Abstract
The present invention relates to a plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, which is applied to suction working conditions in highly deviated well sections. It comprises three pump cylinders, which are combined type including two fixed cylinders and a dynamic cylinder, two centralizers, which are combined type including a dynamic spiral centralizer and fixed spiral centralizer, a fixed cone valve, a cylinder and plug integrated springing fixed cone valve, a fixed plunger and a movable guide rod cone valve to solve the problems such as stuck pump, eccentric wear between plunger and pump cylinder and valve leakage.
Claims
1. An integral three-cylinder cone valve pump, comprising a three-cylinder body, a spring-loaded stationary cone valve, a stationary plunger body, a guide rod movable cone valve, a dual-movable-and-stationary-spiral-bodies centralizer, and a central rod; wherein the three-cylinder body comprises an outer stationary pump cylinder, an intermediate movable pump cylinder, and an inner stationary pump cylinder that are coaxially disposed sequentially from outside to inside, wherein the guide rod movable cone valve and the dual-movable-and-stationary-spiral-bodies centralizer are disposed inside a cylinder cavity of the outer stationary pump cylinder sequentially from top to bottom; wherein the intermediate movable pump cylinder is connected to a bottom of the central rod through the guide rod movable cone valve, allowing the guide rod movable cone valve and the dual-movable-and-stationary-spiral-bodies centralizer to reciprocate up and down along with the central rod; wherein the spring-loaded stationary cone valve and the stationary plunger body are disposed inside a cylinder cavity of the intermediate movable pump cylinder sequentially from up to bottom; the spring-loaded stationary cone valve and the stationary plunger body are integrally formed and they are connected together to the inner stationary pump cylinder; wherein the outer stationary pump cylinder and the inner stationary pump cylinder are fixedly connected together at a bottom of a tubing string through a pump cylinder coupling; wherein a base portion of the pump cylinder coupling defines a coupling guide round hole and a desilting annular groove that are positioned radially from inside to outside; wherein the spring-loaded stationary cone valve comprises a stationary cone valve guide rod, a flow guide centering plate, a stationary cone valve hood, a stationary cone valve spring, and a stationary cone valve body, and a stationary cone valve seat, wherein outer peripheral surface of the stationary cone valve body comprises a lower spring clamping slot and a stationary valve body sealing surface sequentially from top to bottom, wherein an inner wall of an annular cavity of the stationary cone valve seat comprises a stationary valve seat sealing surface and a stationary valve hole along an axial direction sequentially from top to bottom, wherein the stationary cone valve body and the stationary cone valve seat match with each other and operate in conjunction, wherein a stationary cone valve sealing annular band is formed between the stationary valve body sealing surface and the stationary valve seat sealing surface, wherein a base portion of the stationary cone valve hood defines an upper spring clamping slot, and the stationary cone valve spring is arranged between the upper spring clamping slot and the lower spring clamping slot; wherein the spring-loaded stationary cone valve realizes axial alignment through a stationary cone valve seat cavity of the stationary cone valve hood and the inner stationary pump cylinder; wherein the stationary cone valve guide rod comprises a stationary rod cover, a stationary rod body, and a stationary rod joint that are disposed along an axial direction sequentially from top to bottom, wherein the stationary rod joint connected the stationary cone valve guide rod and the stationary cone valve body together through a thread, wherein the stationary rod body passes through the flow guide centering plate and the stationary cone valve hood to form a dual valve cylinder moving pair between the flow guide centering plate and the stationary cone valve hood; wherein the flow guide centering plate is disposed in a cylinder cavity of the intermediate movable pump cylinder and forms a single plate cylinder moving pair between inner walls of the intermediate movable pump cylinder, wherein a central part of the flow guide centering plate is drilled with a round hole and wherein arched guide holes are provided surrounding the flow guide centering plate and are circumferentially and uniformly distributed; wherein the stationary cone valve guide rod and the stationary cone valve spring operate in conjunction to facilitate the opening and closing of the stationary cone valve body; wherein the stationary cone valve body is fixed to and sleeved on the inner stationary pump cylinder, wherein the stationary plunger body comprises a fixed plunger and an anti-wear ring, wherein an outer peripheral surface of the fixed plunger comprises a plunger capturing conical surface and at least one anti-wear groove that are sequentially disposed from top to bottom along an axial direction, wherein the at least one anti-wear groove is inlaid with an anti-wear ring, wherein an annular clearance is defined between the fixed plunger and the intermediate movable ump cylinder, and matching to a layered cylinder surface moving pair; wherein the guide rod movable cone valve comprises a movable cone valve body, a movable cone valve seat, a movable cone valve cover, and a vale movable cone valve guide rod, wherein an outer peripheral surface of the movable cone valve body comprises movable valve body sealing surface, wherein an inner wall of an annular cavity of the movable cone valve seat comprises a movable valve seat sealing surface and a movable valve hole that are sequentially positioned from top to bottom along an axial direction, wherein a movable cone valve sealing annular band is formed between the movable valve body sealing surface and the movable valve seat sealing surface, wherein the guide rod movable cone valve is disposed inside a movable cone valve seat cavity of the movable cone valve cover, wherein an upper portion of the movable cone valve guide rod is threadedly connected with the movable cone valve cover, and a lower portion of the movable cone valve guide rod passes through the movable cone valve body to form a single valve cylinder moving pair with the movable cone valve body; wherein the guide rod movable cone valve is connected with the intermediate movable pump cylinder through the movable cone valve cover, and wherein the movable cone valve cover comprises a movable valve guide cavity and a movable valve cover hole intercommunicated with each other; wherein the guide rod movable cone valve is driven to operate and stop operating by a guiding action of the movable cone valve guide rod; wherein the dual-moveable-and-stationary-spiral-bodies centralizer comprises an upper movable spiral body, a lower stationary spiral body, a upper movable spiral body limiting collar, and a lower movable spiral body centering coupling; wherein the upper movable spiral body is a rotary spiral tooth impeller consisting of an upper spiral tooth body and an upper centering base tube; the lower stationary spiral body is a stationary spiral tooth impeller consisting of a lower spiral tooth body and a lower centering base tube; wherein a tooth pitch of spiral teeth of the upper spiral tooth body gradually decreases from bottom to top along the respective tooth line, and a cross-sectional area of a lower spiral tooth gap between spiral teeth of the lower spiral tooth body gradually decreases from bottom to top along the respective tooth line; wherein a stable liquid film is disposed between a tooth top surface of the lower spiral tooth body and an inner cylinder wall of the outer stationary pump cylinder; wherein a dynamic pressure liquid film is disposed between the upper movable spiral body and the outer stationary pump cylinder; wherein a lower end of the of the lower centering base tube of the lower stationary spiral body comprises a centering capturing conical surface which matches with the plunger capturing conical surface of the fixed plunger, realizing quick down-hole docking between the dual-movable-and-stationary-spiral-bodies centralizer and the stationary plunger body; wherein a spiral tooth top surface of the lower spiral tooth body comprises an anti-collision conical surface, wherein the upper movable spiral body limiting collar is used to achieve upper limiting of the upper movable spiral body, and the lower movable spiral body centering coupling is used to connect the lower stationary spiral body to the intermediate movable pump cylinder so as to form an integral assembly; wherein the intermediate movable pump cylinder comprises a variable-diameter movable tube joint, an upper cylinder limiting collar, and a lower cylinder limiting collar that are sequentially disposed from top to bottom along the axial direction, wherein the intermediate movable pump cylinder and the guide rod cone valve are axially aligned and fixed through the variable-diameter movable tube joint; wherein the upper cylinder limiting collar is used to realize lower limiting of the upper movable spiral body, and the lower cylinder limiting collar is used to realize axial alignment of the dual movable-cylinder-to-stationary-cylinder centralizer; wherein a diameter of a cylinder where an upper portion of an inner wall of an annular cavity of the variable-diameter movable tube joint is disposed is equal to an aperture of the movable valve hole of the movable cone valve seat, and wherein a cylinder where a lower portion of an inner wall of an annular cavity of the variable-diameter movable tube joint is disposed on a same cylindrical surface as an inner wall of an annular cavity of the intermediate movable pump cylinder; wherein the intermediate movable pump cylinder is operative to precisely slidably reciprocate along a cylinder cavity of the outer stationary pump cylinder depending on the levered cylinder surface moving pair and the single plate cylinder moving pair in conjunction with the dynamic pressure liquid film and the stable liquid film.
2. The integral three-cylinder cone valve pump according to claim 1, wherein the stationary cone valve hood is a round box body with an downward opening, wherein both the upper spring clamping slot and the lower spring clamping slot each match with the stationary cone valve spring, wherein an inner wall of an annular cavity of the stationary cone valve hood comprises a fixed valve seat stationary valve seat cavity, a stationary valve guide cavity, and stationary valve cover holes that are sequentially disposed from top to bottom along the axial direction, wherein the stationary valve cover holes are circular pore canals that are circumferentially and uniformly distributed, wherein a liquid flow in the inner stationary pump cylinder is allowed to flow through the stationary valve holes and the stationary valve guide cavity in turn, and be drained by the stationary valve cover holes and the arched guide holes to the cylinder cavity of the intermediate movable pump cylinder; wherein an outer peripheral surface of the stationary rod body is precisely fitted with a round hole wall of a base portion of the stationary cone valve hood and a round hole wall of the flow guide centering plate, wherein the stationary cone valve guide rod is operative to perform a precise reciprocating slide depending on the dual valve cylinder moving pair, wherein a shaft shoulder is formed at a joint of the stationary rod cover and the stationary rod body, wherein a gap is maintained between the shaft shoulder and an upper end face of the flow guide centering plate; wherein an outer peripheral surface of the flow guide centering plate is precisely fitted with the inner wall of the annular cavity of the intermediate movable pump cylinder, wherein a cross section along an axial direction of each of the arched guide holes is formed as a combination of semicircles and rectangles, wherein a sum of sectional areas of the arched guide holes is equal to a sum of sectional areas of the stationary valve holes and sectional areas of the stationary valve cover holes.
3. The integral three-cylinder cone valve pump according to claim 1, wherein a compression spring is used for the stationary cone valve hood, and wherein a maximum elastic force is equal to a sum of a gravitational force acted on the stationary cone valve body and a gravitational force acted on the stationary cone valve guide rod; wherein the stationary valve body sealing surface and the stationary valve seat sealing surface use inverted conical surfaces with an identical taper angle, wherein a diameter of a round circular surface of a relatively larger end of the conical surface where the stationary valve body sealing surface is located is less than a diameter of a cylinder where a cavity wall of the stationary valve guide cavity is located, and a diameter of a circular surface of a relatively smaller end o the conical surface where the stationary valve body sealing surface is located is less than the aperture of the stationary valve hole, wherein a variable diameter rotary surface is used for the inner wall of the annular cavity of the stationary cone valve body, and matches with the stationary rod joint; wherein the stationary cone valve seat is a annular ring body, wherein the stationary valve seat sealing surface is precisely fitted with the stationary valve body sealing surface, wherein a width of the stationary cone valve sealing annular band is greater than a third of a cone height of the conical surface where the stationary valve body sealing surface is located.
4. The integral three-cylinder cone valve pump according to claim 1, wherein an inner wall of an annular cavity of the fixed plunger is formed with a thread and is connected to an upper portion of the inner stationary pump cylinder, wherein a profile of the anti-wear groove has a rectangular shape, wherein the anti-wear grooves are arranged in a layered manner at equal intervals, wherein an outer annular wall surface of the fixed plunger between every two adjacent layers of anti-wear grooves is fitted with the inner wall of the annular cavity of the intermediate movable pump cylinder; wherein a material of the anti-wear ring is an anti-friction alloy, wherein a diameter of a cylinder where the outer peripheral surface of the anti-wear ring is disposed is identical with a size of an annular clearance between the intermediate movable pump cylinder and the fixed plunger, and wherein the outer peripheral surface of the anti-wear ring is closely fitted with the inner wall of the annular cavity of the intermediate movable pump cylinder.
5. The integral three-cylinder cone valve pump according to claim 1, wherein a thin-walled cylinder body is used for the movable cone valve cover, wherein an inner wall of an annular cavity of the movable cone valve seat comprises a movable valve seat cavity, a movable valve guide cavity, a movable valve cover hole, and a variable-diameter threaded joint that are sequentially disposed from top to bottom along an axial direction, wherein both ends of the variable-diameter threaded joint are each formed with a thread with different nominal diameters, wherein a cylindrical surface is used for a cavity wall of the movable valve guide cavity, wherein conical pore canals are used for the movable valve cover holes and are circumferentially and uniformly distributed, wherein a liquid flow in the intermediate movable pump cylinder is allowed to flow through the movable valve hole and the movable valve guide cavity in turn, and thereafter be injected into a cylinder cavity of the outer stationary pump cylinder after depression and speedup by the movable valve cover hole, thus avoiding sand deposition; wherein the movable cone valve guide rod comprises a movable rod body and a movable rod joint that are sequentially disposed from top to bottom along an axial direction, wherein an outer peripheral surface of the movable rod body is precisely fitted with an inner wall of an annular cavity of the movable cone valve body, wherein the movable cone valve guide rod is used to provide a guiding effect depending on the single valve cylinder moving pair.
Description
BRIEF DESCRIPTION OF THE PICTURES
(1) The present invention is further described in the following embodiments, but is not limited to these embodiments.
(2) FIG. 1 is a typical structural sketch of the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers proposed by the present invention.
(3) FIG. 2 is a structural sketch of the movable and fixed three-cylinder body in the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers.
(4) FIG. 3 is a structural sketch of the spring-loaded stationary cone valve in the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers.
(5) FIG. 4 is a structural sketch for the stationary cone valve body, the stationary cone valve seat, the stationary cone valve hood and the stationary cone valve guide rod in the spring-loaded stationary cone valve.
(6) FIG. 5 is a structural sketch of the fixed plunger in the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers.
(7) FIG. 6 is a structural sketch of the guide rod movable cone valve in the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers.
(8) FIG. 7 is a structural sketch for the movable cone valve body, the movable cone valve seat, the movable cone valve cover and the movable cone valve guide rod in the movable cone valve guide rod.
(9) FIG. 8 is a structural sketch of the movable and fixed double-centralizer in the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers.
(10) FIG. 9 is a structural sketch of the upper movable spiral body in the movable and fixed double-centralizer.
(11) FIG. 10 is a structural sketch of the lower stationary spiral body in the movable and fixed double-centralizer.
(12) FIG. 11 is a sketch of installation operation work flow for the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers in the pit.
(13) FIG. 12 is a sketch of pumping operation work flow of the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers.
(14) In the Figures, 1—central rod, 2—guide rod movable cone valve, 3—spring-loaded stationary cone valve, 4—fixed plunger, 5—dual-movable-and-stationary-spiral-bodies centralizer, 6—combined three-cylinder body, 7—outer stationary pump cylinder, 8—intermediate movable pump cylinder, 9—inner stationary pump cylinder, 10—pump cylinder coupling, 11—coupling guide hole, 12—desilting annular groove, 13—lower cylinder limiting collar, 14—upper cylinder limiting collar, 15—variable-diameter movable cylinder joint, 16—stationary cone valve guide rod, 17—flow guide centering plate, 18—stationary cone valve hood, 19—stationary cone valve spring, 20—stationary cone valve body, 21—stationary cone valve seat, 22—stationary cone valve sealing annular band, 23—arched guide hole, 24—single plate cylindrical surface moving pair, 25—dual-valve cylindrical surface moving pair, 26—stationary valve guide cavity, 27—stationary valve cover hole, 28—stationary valve seat cavity, 29—stationary valve hole, 30—stationary valve seat sealing surface, 31—stationary valve body sealing surface, 32—lower spring groove, 33—stationary rod joint, 34—upper spring groove, 35—stationary rod body, 36—stationary rod cover, 37—fixed plunger, 38—anti-wear ring, 39—anti-wear groove, 40—layered cylindrical surface moving pair, 41—plunger capturing cone, 42—movable cone valve cover, 43—movable cone valve guide rod, 44—movable cone valve body, 45—movable cone valve seat, 46—single valve cylindrical surface moving pair, 47—movable cone valve sealing annular band, 48—variable-diameter threaded joint, 49—movable valve cover hole, 50—movable valve guide cavity, 51—movable valve seat cavity, 52—movable rod joint, 53—movable rod body, 54—movable valve hole, 55—movable valve seat sealing surface, 56—movable valve body sealing surface, 57—movable spiral body centering limiting collar, 58—upper movable spiral body, 59—lower movable spiral body centering coupling, 60—lower stationary spiral body, 61—upper spiral tooth body, 62—upper centering base tube, 63—upper spiral tooth space, 64—lower spiral tooth body, 65—lower centering base tube, 66—anti-collision conical surface, 67—centering capturing conical surface, 68—lower spiral tooth pitch.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
(15) In FIG. 1, the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers is mainly composed of the movable cone valve integrated with the guide rod 2, the spring-loaded stationary cone valve 3, the fixed plunger 4, the movable and fixed double-centralizer 5 and the combined three-cylinder body 6, the plug and valve integrated cone valve pump uses the combined type two fixed cylinders and one movable cylinder (movable and fixed three-cylinder body 6), combined type a movable spiral centralizer and a fixed spiral centralizer (movable and fixed double-centralizer 5), a fixed cone valve and a plunger integrated spring-loaded stationary cone valve 3, a fixed plunger 4 and a movable cone valve guide rod (guide rod type traveling cone valve 2) to solve the technological difficulties such as stuck pump by sand when production operation in the horizontal wells and inclined wells under condition of low liquid volume, difficult to open and close pump valve under condition of low submergence depth, the eccentric wear of the plunger and the pump cylinder and the leakage of the pump valve in the highly deviated well sections.
(16) In FIG. 1, The plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers adopts an axial symmetry cylinder body structure on the whole, which is connected to the tubing string and the air anchor through the movable and fixed three-cylinder body 6, and is connected with the central rod string 1 through the movable cone valve integrated with the guide rod 2, the movable cone valve integrated with the guide rod 2, the combined type movable and fixed double-centralizer 5, and the intermediate movable pump cylinder of the movable and fixed three-cylinder body 6 move up and down with the central rod 1; the spring-loaded stationary cone valve 3 and the fixed plunger 4 are arranged in the cylinder cavity of the intermediate movable pump cylinder of the movable and fixed three-cylinder body 6 from top to bottom along the axial direction, and the spring-loaded stationary cone valve 3, the fixed plunger 4, the outer stationary pump cylinder and the internal stationary pump cylinder of the movable and fixed three-cylinder body 6 are fixed at the bottom of the tubing string.
(17) In FIG. 1, before the assembly of the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, the externally stationary pump cylinder of the movable and fixed three-cylinder body 6 and the outer peripheral surface of the pump cylinder coupling are painted to prevent corrosion, the annular cavity inner walls of the outer stationary pump cylinder, the intermediate movable pump cylinder and the internal stationary pump cylinder of the movable and fixed three-cylinder body 6 are respectively to conduct chemical plating treatment, the outer peripheral surfaces of the intermediate movable pump cylinder and the internal stationary pump cylinder, and the outer peripheral surface of the fixed plunger of the stationary plunger body 4, and the upper movable spiral body and the lower stationary spiral body of the movable and fixed double-centralizer 5 are to conduct spraying welding treatment respectively. The fixed plunger of the stationary plunger body 4 is placed in the intermediate movable pump cylinder of the movable and fixed three-cylinder body 6, at the same time, the upper movable spiral body and the lower stationary spiral body of the movable and fixed double-centralizer 5 are placed in the outer stationary pump cylinder of the movable and fixed three-cylinder body 6, when the devices above are pulled back and forth, they should be flexible to rotate and slide without obstruction. The stationary cone valve guide rod of the spring-loaded stationary cone valve 3 is inserted into the guide centering plate and the stationary cone valve hood, and the movable cone valve guide rod of the movable cone valve integrated with the guide rod 2 inserts the movable cone valve body, when the devices above are pulled back and forth, they should be flexible to rotate and slide without obstruction. Keep the inner walls of the outer stationary pump cylinder, the intermediate movable pump cylinder and the internal stationary pump cylinder of the movable and fixed three-cylinder body 6, the lower stationary spiral body of the movable and fixed double-centralizer 5 and the movable cone valve cover of the movable cone valve integrated with the guide rod 2 and the stationary cone valve hood of the spring-loaded stationary cone valve 3 clean, and finally check whether the upper movable spiral body and the lower stationary spiral body of the movable and fixed double-centralizer 5 are damaged, and check whether all threaded connections are firm and non-rust.
(18) In FIG. 1, in the assembly operation of the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, the anti-wear ring of the stationary plunger body 4 is embedded into the anti-wear groove of the fixed plunger, and the stationary cone valve spring of the fixed cone valve 3 is integrated with the stationary cone valve hood and the stationary cone valve body. The stationary cone valve guide rod of the spring-loaded stationary cone valve 3 is inserted into the guide centering plate and the stationary cone valve hood and is connected with the stationary cone valve body through threads, and then the stationary cone valve seat is placed in the stationary cone valve hood and successively connects the stationary plunger body 4 and the spring-loaded stationary cone valve 3 with the upper part of the internal stationary pump cylinder of the movable and fixed three-cylinder body 6 through threads, after that, the outer stationary pump cylinder and the internal stationary pump cylinder of the movable and fixed three-cylinder body 6 are connected together as a whole through the pump cylinder coupling. Next, the lower stationary spiral body of the movable and fixed double-centralizer 5 is connected to the bottom of the intermediate movable pump cylinder through a lower movable spiral body centering coupling, the upper movable spiral body is sleeved on the upper part of the intermediate movable pump cylinder and the movable spiral body centering limiting collar is tightened, after that, the movable cone valve guide rod of the guide rod movable cone valve 2 is connected with the movable cone valve cover through threads, and then the movable cone valve body and the movable cone valve seat are successively placed into the movable cone valve cover, and the guide rod movable cone valve 2 is connected to the top of the intermediate movable pump cylinder through threads.
(19) In FIG. 2, the movable and fixed three-cylinder body 6 includes the outer stationary pump cylinder 7, the intermediate movable pump cylinder 8, the internal stationary pump cylinder 9 and the pump cylinder coupling 10. The specifications of the outer stationary pump cylinder 7 and the pump cylinder coupling 10 are adjusted with the pipe diameter of the tubing string. Factors such as the maximum stroke length of the plug valve integrated cone valve pump, the axial length of the stationary plunger body 4 and the anti-impact stroke need to be considered for the axial length design of the intermediate movable pump cylinder 8. Factors such as liquid production capacity in the oil field and bottom pressure need to be considered for the diameter design of the coupling guide hole 11 and the inner diameter design of the internal stationary pump cylinder 9.
(20) In FIG. 2, in the movable and fixed three-cylinder body 6, the spring-loaded stationary cone valve 3 and the stationary plunger body 4 are connected together as a whole relied on the internal stationary pump cylinder 9, and the guide rod movable cone valve 2 and the movable and fixed double-centralizer 5 are connected together as a whole through the intermediate movable pump cylinder 8 to avoid sand from falling into the annular clearance between the intermediate movable pump cylinder 8 and the stationary plunger body 4 to cause wear. The outer stationary pump cylinder 7 and the internal stationary pump cylinder 9 are connected together as a whole through the pump cylinder coupling 10. The box bottom of the pump cylinder coupling 10 is successively provided with the coupling guide hole 11 and the desilting annular groove 12 from the inside to the outside along the radial direction. The lower cylinder limiting collar 13 realizes the axial alignment of the lower movable spiral body centering coupling of the movable and fixed double-centralizer 5, the upper cylinder limiting collar 14 realizes the lower limit of the upper movable spiral body of the movable and fixed double-centralizer 5, and the outer wall of the variable-diameter movable cylinder joint 15 is connected with the movable cone valve cover of the guide rod movable cone valve 2 and the movable spiral body centering limiting collar of the movable and fixed double-centralizer 5 respectively through threads.
(21) In FIGS. 3 and 4, the spring-loaded stationary cone valve 3 includes the stationary cone valve guide rod 16, the flow guide centering plate 17, the stationary cone valve hood 18, the stationary cone valve spring 19, the stationary cone valve body 20 and the stationary cone valve seat 21, the stationary cone valve body 20 and the stationary cone valve seat 21 are matched and selected based on the diameter of the coupling guide hole 11 and the inner diameter of the internal stationary pump cylinder 9. The specification of the flow guide centering plate 17 is consistent with the inner diameter of the intermediate movable pump cylinder 8. When selecting the specification of the stationary cone valve spring 19, factor such as the sum of the gravity of the stationary cone valve guide rod 16 and the stationary cone valve body 20 need to be considered, when designing the sum of the cross-sectional area of the flow guide centering plate 17 and each arched guide hole 23, the cross-sectional area of the stationary valve hole 29 of the stationary cone valve seat 21, and the sum of the cross-sectional area of each stationary valve cover hole 27 of the stationary cone valve hood 18, factors such as liquid production capacity in the oil field, bottom hole pressure need to be considered.
(22) In FIGS. 3 and 4, the spring-loaded stationary cone valve 3 assists the stationary cone valve body 20 on the stationary cone valve seat 21 to smoothly open and close through the stationary cone valve guide rod 16 and the stationary cone valve spring 19, so as to solve the problem of difficulty in opening of the pump valve and loose closing of the pump valve in the highly inclined well sections, the spring-loaded stationary cone valve 3 is opened in the upstroke and is closed in the down stroke, the stationary cone valve body sealing surface 31 of the stationary cone valve body 20 and the stationary valve seat sealing surface 30 of the stationary cone valve seat 21 form the stationary cone valve sealing annular band 22, the upper spring groove 34 of the stationary cone valve hood 18 and the lower spring groove 32 of the stationary cone valve body 20 are simultaneously matched with the stationary cone valve spring 19 to realize the upper and lower bidirectional limit of the stationary cone valve spring 19, the sum of the cross-sectional area of each arched guide hole 23 of the guide centering plate 17, the cross-sectional area of the stationary valve hole 29 of the stationary cone valve seat 21 and the sum of the cross-sectional area of each stationary valve cover hole 27 of the stationary cone valve hood 18 are equal, the flow guide centering plate 17 and the intermediate movable pump cylinder 8 form the single-plate cylindrical sliding pair 24. The stationary rod joint 33 is connected with the stationary cone valve guide rod 16 and the stationary cone valve body 20 together as a whole. The stationary rod body 35, the stationary cone valve hood 18 and the flow guide centering plate 17 form the dual-valve cylindrical surface moving pair 25, and the stationary cone valve guide rod 16 is based on the double-valve cylindrical sliding pair 25 to achieve precise reciprocating sliding, the stationary rod body 35 and the stationary rod cover 36 form a shaft shoulder where the cross section changes, the stationary cone valve seat 21 is placed in the stationary valve seat cavity 28 and is axially fixed through the internal stationary pump cylinder 9, and the stationary valve guide cavity 26 is in communication with the stationary valve cover hole 27.
(23) In FIG. 5, the specifications of the fixed plunger 37 and the anti-wear ring 38 of the stationary plunger body 4 are consistent with the inner diameter of the intermediate movable pump cylinder 8. The specifications of the anti-wear ring 38 are adjusted based on the annular clearance between the fixed plunger 37 and the intermediate movable pump cylinder 8.
(24) In FIG. 5, the stationary plunger body 4 is matched with the intermediate movable pump cylinder 8 to realize the suction and lifting of the liquid flow, and prevent sand from depositing on the fixed plunger 37, the anti-wear groove 39 of the fixed plunger 37 is embedded the anti-attrition ring 38 to reduce the friction loss between the fixed plunger 37 and the intermediate movable pump cylinder 8. The fixed plunger 37 between anti-wear grooves 39 and the intermediate movable pump cylinder 8 form the annular clearance, which is matched with the layered cylindrical surface moving pair 40. The upper part of the outer peripheral surface of the fixed plunger 37 is provided with the plunger capturing conical surface 41.
(25) In FIGS. 6 and 7, the guide rod movable cone valve 2 includes the movable cone valve cover 42, the movable cone valve guide rod 43, the movable cone valve body 44 and the movable cone valve seat 45. The specification of the movable cone valve cover 42 is consistent with the central rod diameter of the central rod 1, the movable cone valve body 44 is matched with the movable cone valve seat 45, the specification of the movable cone valve body 44 is selected based on the diameter of the cylindrical surface where the upper part of the annular cavity inner wall of the variable-diameter movable cylinder joint 15 is located. Factors such as liquid production capacity in the oil field and bottom hole pressure need to be considered for the design of the cross-sectional area of the movable valve hole 54 of the movable valve cover seat 45 and the sum of the cross-sectional area of each movable valve cover hole 49 of the movable cone valve cover 42.
(26) In FIG. 6 and FIG. 7, the guide rod movable cone valve 2 opens and closes smoothly relied on the guiding function of the movable cone valve guide rod 43, which solves the problem of pump valve leakage in the highly inclined well section, and the guide rod movable cone valve 2 is opened in the down stroke and closed in the upstroke. The movable valve body sealing surface 56 of the movable cone valve body 44 and the movable valve seat sealing surface 55 of the movable cone valve seat 45 form the movable cone valve sealing annular band 47, the movable rod body 53 and the movable cone valve body 44 form the single valve cylindrical surface moving pair 46, the movable cone valve guide rod 43 realizes the guiding function relied on the single valve cylindrical surface moving pair 46, the movable cone valve guide rod 43 is connected with movable rod joint 52 and rod 1 together as a whole through the variable-diameter threaded joint 48, the movable cone valve seat 45 is placed in the movable valve seat cavity 51 and is axially fixed through the variable diameter movable fixed cylinder joint 15, the movable valve cover hole 49 is communicated with the movable valve guide cavity 50, the cross-sectional area of the movable valve hole 54 of the movable cone valve seat 45 is equal to the sum of the cross-sectional area of each movable valve cover hole 49 of the movable cone valve cover 42.
(27) In FIG. 8 to 10, the movable and fixed double-centralizer 5 includes the movable spiral body centering limiting collar 57, the upper movable spiral body 58, the lower movable spiral body centering coupling 59 and the lower stationary spiral body 60, the specifications of the upper movable spiral body 58 and the lower stationary spiral body 60 are consistent with the size of the ring cavity between the outer stationary pump cylinder 7 and the intermediate movable pump cylinder 8 of the movable and fixed three-cylinder body 6, and the specifications of the movable spiral body centering limiting collar 57 and the lower movable spiral body centering coupling 59 are the same as the outer diameter of the intermediate movable pump cylinder 8.
(28) In FIGS. 8 to 10, dynamic pressure liquid films are formed between the upper movable spiral body 58 of the movable and fixed double-centralizer 5 and the outer stationary pump cylinder 7 to realize the follow-up centering of the intermediate movable pump cylinder 8, stable liquid films are formed between the tooth top surface of the lower spiral tooth body 64 of the spiral body 60 and the cylinder wall of the outer stationary pump cylinder 7 to realize the spiral centering of the intermediate movable pump cylinder 8, the lower stationary spiral body 60 drains the sand at the bottom of the outer stationary pump cylinder 7 into the desilting annular groove 12 of the pump cylinder coupling 10, so as to solve the problem of eccentric wear between the fixed plunger 37 and the intermediate movable pump cylinder 8. The movable spiral body centering limiting collar 57 realizes the upper limit of the upper movable spiral body 58, the lower movable spiral body centering coupling 59 connects the lower stationary spiral body 60 and the intermediate movable pump cylinder 8 together as a whole. The upper spiral tooth body 61 is evenly distributed on the outer peripheral surface of the upper centering base tube 62 along the circumferential direction, and the lower spiral tooth body 64 is evenly distributed on the outer peripheral surface of the lower centering base tube 65 along the circumferential direction, the upper spiral tooth body 61 drains the liquid flow carrying sand in the upper spiral tooth space 63 into the upper cylinder cavity of the intermediate movable pump cylinder 8 in time. The sectional area of the lower spiral tooth pitch 68 is gradually decreased from bottom to top along the tooth line, the centering capturing conical surface 67 of the lower stationary spiral body 60 matches the plunger catching conical surface 41 of the fixed plunger 37, and the anti-collision conical surface 66 avoids the movable and fixed double-centralizer 5 colliding the tubing string wall or the cylinder wall of the outer stationary pump cylinder 7 during the installation operation in the pit with the central rod 1.
(29) In FIG. 11, in the down hole installation operation process of the plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, the outer stationary pump cylinder 7, the internal stationary pump cylinder 9 and the pump cylinder coupling 10, the spring-loaded stationary cone valve 3, and the stationary plunger body 4 of the movable and fixed three-cylinder body 6 are connected to the bottom end of the tubing string and go down into the wellbore fluid production part with the tubing string, and then the intermediate movable pump cylinder 8 of the movable and fixed three-cylinder body 6, the guide rod movable cone valve 2 and the movable and fixed double-centralizer 5 are connected to the bottom end of the central rod 1 and go down the annular cavity between the outer stationary pump cylinder 7 and the internal stationary pump cylinder 9 with the central rod 1, after the plunger capturing conical surface 41 of the fixed plunger 37 is matched with the centering capturing conical surface 67 of the lower spiral body 60, the movable and fixed double-centralizer 5 quickly dock with the stationary plunger body 4 down hole, until the bottom end of the lower stationary spiral body 60 fits the pump cylinder coupling 10, the intermediate movable pump cylinder 8, guide rod movable cone valve 2 and the movable fixed double-centralizer 5 are moved up together with the central rod 1.
(30) In FIG. 12, in the plug-valve integrated cone valve suction operation upstroke of plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, dynamic pressure liquid films are formed between the upper movable spiral body 58 of the movable and fixed double-centralizer 5 and the outer stationary pump cylinder 7, at the same time, stable liquid films are formed between the tooth top surface of the lower spiral tooth body 64 of the spiral body 60 and the cylinder cavity of the outer stationary pump cylinder 7, the intermediate movable pump cylinder 8 of the movable and fixed three-cylinder body 6 realizes follow-up centering and spiral centering, at the same time, relied on the layered cylindrical surface moving pair 40 of the fixed plunger 37 and the single-plate cylindrical sliding pair 24 of the flow guide centering plate 17, the intermediate movable pump cylinder 8, the central rod 1, the guide rod movable cone valve 2 and the movable and fixed double-centralizer 5 accurately slide upward along the cylinder cavity of the externally stationary pump cylinder 7, and the flow pressure in the cylinder cavity of the intermediate movable pump cylinder 8 decreases, the guide rod movable cone valve 2 is in the closed state relied on the guiding function of the movable cone valve guide rod 43, and the spring-loaded stationary cone valve 3 is smoothly opened through the assists of the stationary cone valve guide rod 16 and the liquid flows through the coupling guide hole 11 into the cylinder cavity of the internal stationary pump cylinder 9, and then the liquid flows through the stationary valve hole 29 and the stationary valve guide cavity 26, and is diverted to the cylinder cavity of the intermediate movable pump cylinder 8 passed through the stationary valve cover hole 27 and the arched guide hole 23, at the same time, the liquid flow above the upper movable spiral body 58 enters the pipe cavity of the tubing string with the central rod 1.
(31) In FIG. 12, in the plug-valve integrated cone valve suction operation down stroke of plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, dynamic pressure liquid films are formed between the upper movable spiral body 58 and the outer stationary pump cylinder 7, at the same time, stable liquid films are formed between the tooth top surface of the lower spiral tooth body 64 and the outer stationary pump cylinder 7, the intermediate movable pump cylinder 8 realizes follow-up centering and spiral centering, at the same time, relied on the layered cylindrical surface moving pair 40 and the single-plate cylindrical sliding pair 24, the intermediate movable pump cylinder 8, the central rod 1, the guide rod movable cone valve 2 and the movable and fixed double-centralizer 5 accurately slide downward along the cylinder cavity of the externally stationary pump cylinder 7. The flow pressure in the cylinder cavity of the intermediate movable pump cylinder 8 increases, the spring-loaded stationary cone valve 3 assists the stationary cone valve body 20 in the closed state through the stationary cone valve guide rod 16 and the stationary cone valve spring 19, and the guide rod movable cone valve 2 opens smoothly relied on the guiding function of the movable cone valve guide rod 43, the liquid flows through the cylinder cavity of the intermediate movable pump cylinder 8 and enters the variable-diameter movable cylinder joint 15, and then the liquid successively flows through the movable valve hole 54 and the movable valve guide cavity 50, which are decompressed and accelerated passed through the movable valve cover hole 49 and then injected into the cylinder cavity of the outer stationary pump cylinder 7, the upper spiral tooth body 61 of the upper movable spiral body 58 drains the liquid flow carrying sand in the upper spiral tooth space 63 into the upper cylinder cavity of the intermediate movable pump cylinder 8 in time, and the lower spiral tooth body 64 of the lower spiral body 60 spirally stirs the liquid flow at the bottom of the annular cavity between the outer stationary pump cylinder 7 and the internal stationary pump cylinder 9 and in time and drains the sand to the desilting annular groove 12 of the pump cylinder coupling 10.
(32) The embodiments above are only used to illustrate the present invention, where the structure and connection mode of each component may be changed. All equivalent transformation and improvement made on the basis of the technical solution of the present invention should not be excluded from the scope of the present invention.
