OMNI-DIRECTIONAL HORIZONTALLY ORIENTAED DEFLECTING TOOL FOR COILED TUBING

Abstract

The disclosure relates to an omni-directional horizontally oriented deflecting tool for a coiled tubing, which includes an inner central pipe, an outer central pipe, a conical outer cylinder, a piston outer cylinder, an anchoring mechanism, a sealing mechanism, a reversing mechanism and a steering mechanism. The anchoring mechanism includes a cone, an O-shaped sealing ring I, a cone spring, a slip, a slip spring, a slip seat, a claw I and a pin shaft I, and the sealing mechanism includes a piston, an O-shaped sealing ring II, a claw II, a pin shaft II, an upper rubber cylinder seat, a rubber cylinder, a connecting cylinder, a lower rubber cylinder seat and a gasket.

Claims

1. An omni-directional horizontally oriented deflecting tool for a coiled tubing, comprising an inner central pipe 2, an outer central pipe 1, a cone outer cylinder 4 connected with the outer central pipe 1 through a shear pin I 3, a piston outer cylinder 12 connected with the outer central pipe 1 through a shear pin II 11, an anchoring mechanism, a sealing mechanism, a transposition mechanism and a steering mechanism, wherein an upper part and a middle-lower part of the outer central pipe 1 are provided with threaded holes 101, a middle-upper part and a lower part thereof are provided with circumferential circular through holes 102, and outer walls of a middle part and the lower part thereof are provided with circumferential rectangular grooves 103, an inner side of a lower part of each rectangular groove 103 is provided with a circular hole 104, and a segment of rectangular groove 105 is provided in both sides of a lower part of the outer central pipe 1; the anchoring mechanism comprises a cone 7, an O-shaped seal ring I 8, a cone spring 10, a slip 30, a slip spring 29, a slip seat 9, a claw I 5 and a pin shaft I 6, wherein an upper part of the cone 7 is provided with a step 701 and a lower part thereof is provided with a conical surface 703 and is circumferentially provided with three rectangular through grooves 702 uniformly, the cone 7 is installed between the outer central pipe 1 and the cone outer cylinder 4, an outer side of an upper part of the slip seat 9 is provided with external thread I 901, and an inner side of the upper part of the slip seat is provided with two annular grooves 902, and the slip seat is circumferentially provided with three groups of rectangular through grooves 903 and an inner side of the slip seat is provided with three circular grooves 904, the slip seat 9 is connected to the cone outer cylinder 4 through thread, the O-shaped seal ring I 8 is arranged between the slip seat 9 and the cone 7 and the O-shaped seal ring I 8 is installed in the annular groove 902 at the inner side of the upper part of the slip seat 9, the cone spring 10 is arranged between the rectangular through groove 702 of the lower part of the cone 7 and the slip seat 9, the slip 30 is installed in the rectangular through groove 903 of the slip seat 9, and the upper part of the slip 30 is in contact with the conical surface 703 of the lower part of the cone 7, the slip spring 29 is arranged between the slip 30 and the circular groove 904 at the inner side of the slip seat 9, and the claw I 5 is installed in the rectangular groove 103 of the middle part of the outer wall of the outer central pipe 1 through the pin shaft I 6; the sealing mechanism comprises a piston 13, an O-shaped sealing ring II 14, a claw II 28, a pin shaft II 27, an upper rubber cylinder seat 15, a rubber cylinder 16, a connecting cylinder 18, a lower rubber cylinder seat 19 and a gasket 17, wherein an upper end of the piston 13 is an annular frustum 1301, a lower part of the annular frustum 1301 is provided with four annular bosses 1302 with a certain radian, the piston 13 is sleeved between the outer central pipe 1 and the piston outer cylinder 12, the O-shaped sealing ring II 14 is arranged between the annular frustum 1301 at the upper end of the piston 13 and the piston outer cylinder 12, and the claw II 28 is installed in the rectangular groove 103 of the lower part of the outer wall of the outer central pipe 1 through the pin shaft II 27, an inner side of an upper part of the upper rubber cylinder seat 15 is provided with thread II 1501, and an inner side of the upper rubber cylinder seat is provided with thread III 1502, the upper rubber cylinder seat 15 is provided with four annular through grooves 1503 with a certain radian, the upper rubber cylinder seat 15 is connected to the piston outer cylinder 12 through thread, the annular boss 1302 of the piston is installed in cooperation with the annular through groove 1503 of the upper rubber cylinder seat, the connecting cylinder 18 is sleeved outside the outer central pipe 1 and connected to the upper rubber cylinder seat 15 through thread, the gasket 17 is sleeved outside the connecting cylinder 18 and is in contact with the upper rubber cylinder seat 15, the rubber cylinder 16 is sleeved outside the connecting cylinder 18 and is in contact with the gasket 17, and the lower rubber cylinder seat 19 is connected to the connecting cylinder 18 through thread; the transposition mechanism comprises a lower outer cylinder 20, a transposition spring 21, a thrust bearing 22 and a transposer 23, wherein the lower outer cylinder 20 is connected to the lower rubber cylinder seat 19 through threads, the transposition spring 21 is arranged between the outer central pipe 1 and the lower outer cylinder 20, an upper end of the transposition spring is in contact with the lower rubber cylinder seat 19 and the lower end of the transposition spring is in contact with the thrust bearing 22, the thrust bearing 22 is sleeved between the outer central pipe 1 and the lower outer cylinder 20, an inner side of a middle of the transposer 23 is provided with six groups of transposition tracks, and each of the six groups of transposition tracks comprises a track I 2302, a track II 2303, a track III 2304 and a track IV 2305, the transposer 23 is installed in the lower outer cylinder 20, and an upper end face of the transposer 23 is in contact with a lower end face of the thrust bearing 22; and the steering mechanism comprises a steering cylinder frame 24, a steering cylinder 26 and a pin shaft III 25, wherein the steering cylinder frame 24 is connected to a lower end of the transposer 23 through threads, and the steering cylinder 26 is installed between the steering cylinder frames 24 through a pin shaft 25, an upper part and an upper-middle part of the inner central pipe 2 are provided with circumferential circular through holes 201, a middle-lower part and a lower part thereof are provided with circumferential pin holes 202, the pins are installed in the pin holes 202, the pin of the middle-lower part of the inner central pipe 2 are matched with the rectangular groove 105 of the lower part of the outer central pipe 1, the pin of the middle-lower part of the inner central pipe 2 move axially along the rectangular groove 105 of the lower part of the outer central pipe 1, the pin of the middle-lower part of the inner central pipe 2 is installed in cooperation with the transposition track, the pin of the middle-lower part of the inner central pipe 2 slides in the transposition track, and the through hole 201 of the inner central pipe are aligned with the through hole 102 of the outer central pipe.

2. The omni-directional horizontally oriented deflecting tool for the coiled tubing according to claim 1, wherein a lower part of the claw I 5 is provided with a through hole 502 and an upper part thereof is provided with a protrusion 501.

3. The omni-directional horizontally oriented deflecting tool for the coiled tubing according to claim 1, wherein an outer side of an upper end of the connecting cylinder 18 is provided with thread IV 1801, and an outer side of a lower end of the connecting cylinder is provided with thread V 1802.

4. The coiled tubing omni-directional horizontally oriented deflecting tool according to claim 1, wherein an outer side of an upper end of the lower outer cylinder 20 is provided with thread VI 2001 and a lower end of the lower outer cylinder is provided with a boss 2002.

5. The omni-directional horizontally oriented deflecting tool for the coiled tubing according to claim 1, wherein an outer side of an upper end of the transposer 23 is provided with a step 2301 and an inner side of the lower end of the transposer is provided with thread VII 2306.

6. The omni-directional horizontally oriented deflecting tool for the coiled tubing according to claim 1, wherein an outer side of an upper end of the steering cylinder frame 24 is provided with thread VIII 2401, a lower end of the steering cylinder frame is provided with a rectangular through groove 2403 and a lower part of the steering cylinder frame is provided with a circular through hole 2402.

7. The omni-directional horizontally oriented deflecting tool for the coiled tubing according to claim 1, wherein an outer part of the steering cylinder 26 is provided with a arc surface 2601 with a certain radian, an inner part of the steering cylinder is provided with a circular channel 2602 with a certain curvature, and circular holes 2603 are provided outside of two sides of the steering cylinder.

8. The omni-directional horizontally oriented deflecting tool for the coiled tubing according to claim 1, wherein a transposition method of the transposition mechanism comprises following steps: S1, the inner central pipe 2 moving to trip out the coiled tubing and the drill bit 31, the coiled tubing and the drill bit 31 driving the inner central pipe 2 to move axially upwards; S2, the pin sliding and the inner central pipe 2 moving axially upwards, and the pin of the lower part of the inner central pipe 2 sliding in the rail I 2302 in the transposition rail of the transposer 23; S3, the transposer peforming transposition, in which the pin of the low part of the inner central pipe 2 slides into the rail II 2303 from the rail I 2302, and the pin of the lower part of the inner central pipe 2 moves axially upwards to drive the transposer 23 to rotate; S4, finishing transposition, in which after the pin of the lower part of the inner central pipe 2 slides into the rail III 2304 from the rail II 2303, tripping out of the coiled tubing and the drill bit 31 is stopped; S5: completing the transposition, in which the coiled tubing and the drill bit 31 are tripped in after the transposition is completed, the inner central pipe 2 moves downwards, and the pin of the lower part of the inner central pipe 2 slides from the rail III 2304 to the rail IV 2305, so as to perform the transposition once; and S6, repeating the steps Si to S5 when transposition is performed again until drilling in various directions at a same horizontal height is completed.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 is a half sectional view of a tool according to the present disclosure;

[0031] FIG. 2 is an overall sectional view of the tool according to the present disclosure;

[0032] FIG. 3 is a structural diagram of an inner central pipe according to the present disclosure;

[0033] FIG. 4 is a structural diagram of an outer central pipe according to the present disclosure;

[0034] FIG. 5 is an outside view of a cone according to the present disclosure;

[0035] FIG. 6 is an outside view of a claw according to the present disclosure;

[0036] FIG. 7 is a structural diagram of a slip seat according to the present disclosure;

[0037] FIG. 8 is an outside view of a piston according to the present disclosure;

[0038] FIG. 9 is an outside view of an upper rubber cylinder according to the present disclosure;

[0039] FIG. 10 is an outside view of a connecting cylinder according to the present disclosure;

[0040] FIG. 11 is a structural schematic diagram of an outer cylinder according to the present invention;

[0041] FIG. 12 is a structural diagram of a transposer according to the present disclosure;

[0042] FIG. 13 is an outside view of a steering cylinder frame according to the present disclosure;

[0043] FIG. 14 is a structural schematic diagram of a steering cylinder according to the present disclosure;

[0044] FIG. 15 is a schematic diagram of anchoring and sealing according to the present disclosure;

[0045] FIG. 16 is a schematic diagram of deflecting according to the present disclosure; and

[0046] FIG. 17 is a flowchart of a transposition process according to the present disclosure.

[0047] Reference numbers are as follows: 1Outer Center Tube, 2Inner Center Tube, 3Shear Pin I, 4Cone Outer Cylinder, 5Jaw I, 6Pin Shaft I, 7Cone, 8O-shaped Seal Ring I, 9Slip Seat, 10Cone Spring, 11Shear Pin Shaft II, 12Piston Outer Cylinder, 13Piston, 14O-shaped Seal Ring II, 15Upper Rubber Cylinder Seat, 16Rubber Cylinder, 17Gasket, 18Connecting Cylinder, 19Lower Rubber Cylinder Seat, 20Lower Outer Cylinder, 21Transposition Spring, 22Thrust Bearing, 23Transporter, 24Steering Cylinder Frame, 25Pin Shaft III, 26Steering Cylinder, 27Pin Shaft II, 28Jaw II, 29Slip Spring, 30Slip, 31Coiled Tubing and Drill Bit, 101Threaded Hole, 102Through Hole, 103Rectangular Groove, 104Circular Hole, 105Rectangular Groove, 201Through Hole, 202Pin Hole, 501Protrusion, 502Through Hole, 701Step, 702Rectangular Through Groove, 703Conical Surface, 901Thread I, 902Annular Groove, 903Rectangular Through Groove, 904Circular Groove, 1301Annular Frustum, 1302Annular Boss, 1501Thread II, 1502Thread III, 1503Annular Through Groove, 1801Thread IV, 1802Thread V, 2001Thread VI, 2002Boss, 2301Boss, 2302Rail I, 2303Rail II, 2304Rail III, 2305Rail IV, 2306Thread VII, 2401Thread VIII, 2402Circular Through Hole, 2403Rectangular Through Groove, 2601Arc Surface, 2602Circular channel, 2603Circular Hole.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0048] The disclosure will be further described with reference to the drawings in the following.

[0049] As shown in FIGS. 1 to 14, an omni-directional horizontally oriented deflecting tool for a coiled tubing includes an inner central pipe 2, an outer central pipe 1, a cone outer cylinder 4 connected with the outer central pipe 1 through a shear pin I 3, a piston outer cylinder 12 connected with the outer central pipe 1 through a shear pin II 11, an anchoring mechanism, a sealing mechanism, a transposition mechanism and a steering mechanism. An upper part and a middle-lower part of the outer central pipe 1 are provided with threaded holes 101, a middle-upper part and a lower part thereof are provided with circumferential circular through holes 102, and outer walls of a middle part and the lower part thereof are provided with circumferential rectangular grooves 103, an inner side of a lower part of each rectangular groove 103 is provided with a circular hole 104, and a segment of rectangular groove 105 is provided in both sides of a lower part of the outer central pipe 1. The anchoring mechanism includes a cone 7, an O-shaped seal ring I 8, a cone spring 10, a slip 30, a slip spring 29, a slip seat 9, a claw I 5 and a pin shaft I 6. An upper part of the cone 7 is provided with a step 701 and a lower part thereof is provided with a conical surface 703 and is circumferentially provided with three rectangular through grooves 702 uniformly, the cone 7 is installed between the outer central pipe 1 and the cone outer cylinder 4, an outer side of an upper part of the slip seat 9 is provided with external thread I 901, and an inner side of the upper part of the slip seat is provided with two annular grooves 902, and the slip seat is circumferentially provided with three groups of rectangular through grooves 903 and an inner side of the slip seat is provided with three circular grooves 904, the slip seat 9 is connected to the cone outer cylinder 4 through thread, the O-shaped seal ring I 8 is arranged between the slip seat 9 and the cone 7 and the O-shaped seal ring I 8 is installed in the annular groove 902 at the inner side of the upper part of the slip seat 9, the cone spring 10 is arranged between the rectangular through groove 702 of the lower part of the cone 7 and the slip seat 9, the slip 30 is installed in the rectangular through groove 903 of the slip seat 9, and the upper part of the slip 30 is in contact with the conical surface 703 of the lower part of the cone 7, the slip spring 29 is arranged between the slip 30 and the circular groove 904 at the inner side of the slip seat 9, a lower part of the claw I 5 is provided with a through hole 502 and an upper part of the claw is provided with a protrusion 501, and the claw I 5 is installed in the rectangular groove 103 of the middle part of the outer wall of the outer central pipe 1 through the pin shaft I 6. The sealing mechanism includes a piston 13, an O-shaped sealing ring II 14, a claw II 28, a pin shaft II 27, an upper rubber cylinder seat 15, a rubber cylinder 16, a connecting cylinder 18, a lower rubber cylinder seat 19 and a gasket 17. An upper end of the piston 13 is an annular frustum 1301, a lower part of the annular frustum 1301 is provided with four annular bosses 1302 with a certain radian, the piston 13 is sleeved between the outer central pipe 1 and the piston outer cylinder 12, the O-shaped sealing ring II 14 is arranged between the annular frustum 1301 at the upper end of the piston 13 and the piston outer cylinder 12, and the claw II 28 is installed in the rectangular groove 103 of the lower part of the outer wall of the outer central pipe 1 through the pin shaft II 27, an inner side of an upper part of the upper rubber cylinder seat 15 is provided with thread II 1501, and an inner side of the upper rubber cylinder seat is provided with thread III 1502, the upper rubber cylinder seat 15 is provided with four annular through grooves 1503 with a certain radian, the upper rubber cylinder seat 15 is connected to the piston outer cylinder 12 through thread, the annular boss 1302 of the piston is installed in cooperation with the annular through groove 1503 of the upper rubber cylinder seat, an outer side of an upper end of the connecting cylinder 18 is provided with thread IV 1801, and an outer side of a lower end of the connecting cylinder is provided with thread V 1802, the connecting cylinder 18 is sleeved outside the outer central pipe 1 and connected to the upper rubber cylinder seat 15 through thread, the gasket 17 is sleeved outside the connecting cylinder 18 and is in contact with the upper rubber cylinder seat 15, the rubber cylinder 16 is sleeved outside the connecting cylinder 18 and is in contact with the gasket 17, and the lower rubber cylinder seat 19 is connected to the connecting cylinder 18 through thread. The transposition mechanism includes a lower outer cylinder 20, a transposition spring 21, a thrust bearing 22 and a transposer 23, an outer side of an upper end of the lower outer cylinder 20 is provided with thread VI 2001, and a lower end of the lower outer cylinder is provided with a boss 2002, the lower outer cylinder 20 is connected to the lower rubber cylinder seat 19 through thread, the transposition spring 21 is arranged between the outer central pipe 1 and the lower outer cylinder 20, an upper end of the transposition spring is in contact with the lower rubber cylinder seat 19 and a lower end of the transposition spring is in contact with the thrust bearing 22, the thrust bearing 22 is sleeved between the outer central pipe 1 and the lower outer cylinder 20, an outer side of an upper end of the transposer 23 is provided with a step 2301 and an inner side of a lower end of the transposer is provided with thread VII 2306, an inner side of a middle of the transposer is provided with six groups of transposition rails, and each of the six groups of transposition rails includes a rail I 2302, a rail II 2303, a rail III 2304 and a rail IV 2305, the transposer 23 is installed in the lower outer cylinder 20, and an upper end face of the transposer 23 is in contact with a lower end face of the thrust bearing 22. The steering mechanism includes a steering cylinder frame 24, a steering cylinder 26 and a pin shaft III 25. An outer side of an upper end of the steering cylinder frame 24 is provided with thread VIII 2401, a lower end of the steering cylinder frame is provided with a rectangular through groove 2403, and a lower part of the steering cylinder frame is provided with a circular through hole 2402, the steering cylinder frame 24 is connected to a lower end of the transposer 23 by thread, an outer part of the steering cylinder 26 is provided with an arc surface 2601 with a certain curvature, an inner part of the steering cylinder is provided with a circular channel 2602 with a certain curvature, and circular holes 2603 are provided outside of two sides of the steering cylinder, the steering cylinder 26 is installed between the steering cylinder frames 24 through a pin shaft III 25, an upper part and an upper-middle part of the inner central pipe 2 are provided with circumferential circular through holes 201, a middle-lower part and a lower part thereof are provided with circumferential pin holes 202, the pins are installed in the pin holes 202, the pin of the middle-lower part of the inner central pipe 2 are matched with the rectangular groove 105 of the lower part of the outer central pipe 1, the pin of the middle-lower part of the inner central pipe 2 move axially along the rectangular groove 105 of the lower part of the outer central pipe 1, the pin of the middle-lower part of the inner central pipe 2 is installed in cooperation with the transposition track, the pin of the middle-lower part of the inner central pipe 2 slides in the transposition track, and the through hole 201 of the inner central pipe are aligned with the through hole 102 of the outer central pipe.

[0050] An operation process of the disclosure is as follows.

Anchoring Process:

[0051] The drill bit and the tool are tripped in to a predetermined deflection depth, and drilling fluid is injected into the tool through the coiled tubing and the drill bit 31 to pressurize it. The drilling fluid enters annular spaces between the outer central pipe 1 and the cone outer cylinder 4 and between the outer central pipe 1 and the piston outer cylinder 12 from the inner central pipe 2 through the horizontal through hole 201 and the horizontal through hole 102 of the outer central pipe. The drilling fluid, when pressurized to a certain hydraulic pressure, pushes the cone 7 downward, and hydraulically push the piston 13 placed in the piston outer cylinder 12 downward at the same time. The cone 7 descends to spread the slip 30 to anchor the slip 30 to an inner wall of the casing, and the piston 13 descends to compress the rubber cylinder 16 to expand, thus sealing an annular space between the tool and the casing. When the tool is anchored and sealed, the cone 7 and the piston 13 descend to a certain position. At this time, the claws 5 and 28 installed in the rectangular groove 103 on an outer wall of the outer center tube extend out to grasp the cone 7 and the piston 13, so as to prevent the cone 7 from going upward due to rebound of the lower part of the cone spring 10 and the rubber cylinder 16 from driving the piston 13 to go upward due to its own elastic rebound after compression. At this time, the deflecting tool completes anchoring and sealing, and the tool is fixed at a predetermined depth.

Deflecting Process:

[0052] After the anchoring and sealing of the deflecting tool is completed, the coiled tubing and the drill bit 31 are tripped in. Due to flexible characteristics of the coiled tubing and when the drill bit and the coiled tubing 31 are tripped into the circular channel 2602 in the steering cylinder 26, the steering cylinder 26 rotates for a certain angle during continuous tripping in of the drill bit since the steering cylinder 26 is eccentrically arranged, and the coiled tubing bends in a wellbore, so that an advancing direction of the drill bit is deviated from a tool axis so as to achieve a purpose of deflecting.

Drilling Azimuth Changing Process:

[0053] When drilling in a certain direction by the drill bit is complete, the coiled tubing and the drill bit 31 are recovered into the deflecting tool and then tripped out, and the coiled tubing and the drill bit 31 will drive the inner central pipe 2 to move axially upward in the outer central pipe 1, and the pin at the lower part of the inner central pipe 2 slides in the rail I 2302 of the transposition rail of the transposer 23. When the pin moves to the rail II 2303 of the transposition rail and since the inner central pipe 2 can only move axially, the pin drives the transposer 23 to rotate when it moves axially upward at the rail II 2303 of the indexing rail. When the pin moves to the rail III 2304, tripping-out of the coiled tubing and the drill bit 31 is stopped, and then the coiled tubing and the drill bit 31 are tripped in, the inner central pipe 2 descends along the rail III 2304 under action of gravity, and the pin wipe in the rail IV 2305 from the rail III 2304. At this time, the tool completes azimuth changing once.

Unsealing Process:

[0054] When the casing needs to be taken out for the deflecting tool, the coiled tubing and the drill bit 31 are recovered into the deflecting tool. When the coiled tubing and the drill bit 31 are tripped out continuously, the inner central pipe 2 will be driven upward. When the coiled tubing and the drill bit 31 are tripped out so that the inner central pipe 2 is in contact with an end face of the outer central pipe 1, a tripping-out force may be increased until the shear pins I 3 and II 11 at joints of the outer central pipe 1 and the outer cone tube 4 and of the outer central pipe 1 and the outer piston tube 12 are sheared, and at this time the outer central tube 1 and the cone outer cylinder 4 can axially move relatively. The coiled tubing and the drill bit 31 is continued to be tripped out to drive the inner central pipe 2 and the outer central pipe 1 upward. Because the jaws 5 and 28 are arranged in the outer wall of the outer central pipe 1, when the outer central pipe 1 goes upward, the jaws 5 and 28 also go upward, so the cone 7 goes upward due to rebound of the cone spring 10, the slip 30 is recovered due to rebound of the slip spring 29 between the slip 30 and the slip seat 9, and the piston 13 ascends due to recovery of the compressed rubber cylinder 16, thus effecting unsealing, and extraction of the tool.