Tubular wire mesh for loss circulation and wellbore stability
11078749 · 2021-08-03
Assignee
Inventors
Cpc classification
E21B33/138
FIXED CONSTRUCTIONS
International classification
E21B33/138
FIXED CONSTRUCTIONS
Abstract
Systems and methods for sealing a problem zone of a subterranean well include a wire mesh member with a tubular shape and a plurality of openings. The wire mesh member has an initial orientation with an initial outer diameter that is greater than an inner diameter of the wellbore, a reduced orientation with a reduced outer diameter that is less than the inner diameter of the wellbore and an induced bending stress, and an installed orientation with an installed outer diameter that is generally equal to the inner diameter of the wellbore and a residual bending stress. The wire mesh member is positioned within the problem zone and moved to the installed orientation so that an outer surface of the wire mesh member engages an inner surface of the wellbore. The plurality of openings are plugged to prevent a flow of fluid radially through the wire mesh member.
Claims
1. A method for sealing a problem zone of a subterranean well, the method including: delivering a wire mesh member formed of a rolled wire mesh sheet into a wellbore of the subterranean well, where the wire mesh member has a tubular shape and a plurality of openings, and where the wire mesh member has: an initial orientation where the wire mesh member has an initial outer diameter that is greater than an inner diameter of the wellbore; a reduced orientation where the wire mesh member has a reduced outer diameter that is less than the inner diameter of the wellbore and where the wire mesh member has an induced bending stress, where an end of the wire mesh member has reduced orientation overlap that is greater than a circumference of the wire mesh member, such that the wire mesh member has at least two layers of the wire mesh member over the entire circumference of the wire mesh member; and an installed orientation where the wire mesh member has an installed outer diameter that is generally equal to the inner diameter of the wellbore, where the end of the wire mesh member has an installed overlap that is less than the circumference of the wire mesh member, such that the wire mesh member has two layers of the wire mesh member over a length of the circumference of the installed overlap and a single layer of the wire mesh member over a remaining circumference, and where the wire mesh member has a residual bending stress; positioning the wire mesh member within the problem zone of the subterranean well; moving the wire mesh member from the reduced orientation to the installed orientation so that the end of the wire mesh member moves a distance that is longer than the circumference of the wire mesh member from the reduced orientation overlap to the installed overlap, and so that an outer surface of the wire mesh member engages an inner surface of the wellbore; and plugging the plurality of openings to prevent a flow of fluid radially through the wire mesh member.
2. The method of claim 1, further including before delivering the wire mesh member into the wellbore, maintaining the wire mesh member in the reduced orientation with a removable fastener.
3. The method of claim 2, where the removable fastener is selected from a group consisting of a glue, a weld, and a strap.
4. The method of claim 2, where moving the wire mesh member from the reduced orientation to the installed orientation includes dissolving the removable fastener.
5. The method of claim 1, where the plurality of openings are located between parallel longitudinal wires and parallel cross wires.
6. The method of claim 1, where plugging the plurality of openings includes sealing around an entire circumference of the wire mesh member over an entire length of the wire mesh member.
7. The method of claim 1, where plugging the plurality of openings includes delivering a plugging material through the wellbore to the wire mesh member, where the plurality of openings are sized to be larger than the largest size of the plugging material, and the plugging material is sized to bridge a across the plurality of openings.
8. The method of claim 1, where the wire mesh member is coated with a swellable material and where plugging the plurality of openings includes activating the swellable material so that the swellable material fills the plurality of openings and the plurality of openings are sealed around the entire circumference of the wire mesh member so that the wire mesh member forms a solid tubular member.
9. The method of claim 1, where in the installed orientation the wire mesh member has a wire inner bore with an installed inner diameter, and where the method further includes after moving the wire mesh member from the reduced orientation to the installed orientation, passing a drill string through the wire inner bore of the wire mesh member.
10. A method for sealing a problem zone of a subterranean well, the method including: delivering a wire mesh member into a wellbore of the subterranean well, where the wire mesh member has a tubular shape and a plurality of openings, where delivering the wire mesh member into the wellbore of the subterranean well includes delivering wire mesh member through a drill string, and where the wire mesh member has: an initial orientation where the wire mesh member has an initial outer diameter that is greater than an inner diameter of the wellbore; a reduced orientation where the wire mesh member has a reduced outer diameter that is less than the inner diameter of the wellbore and where the wire mesh member has an induced bending stress; and an installed orientation where the wire mesh member has an installed outer diameter that is generally equal to the inner diameter of the wellbore and where the wire mesh member has a residual bending stress; positioning the wire mesh member within the problem zone of the subterranean well; moving the wire mesh member from the reduced orientation to the installed orientation so that an outer surface of the wire mesh member engages an inner surface of the wellbore; and plugging the plurality of openings to prevent a flow of fluid radially through the wire mesh member.
11. A method for sealing a problem zone of a subterranean well, the method including: rolling a wire mesh sheet into a tubular shape to form a wire mesh member having an initial orientation, where in the initial orientation the wire mesh member has an initial outer diameter that is greater than an inner diameter of a wellbore of the subterranean well and where the wire mesh member is free of bending stresses; moving the wire mesh sheet from the initial orientation to a reduced orientation, where in the reduced orientation the wire mesh member has a reduced outer diameter that is less than the inner diameter of the wellbore and where the wire mesh member has an induced bending stress, where an end of the wire mesh member has reduced orientation overlap that is greater than a circumference of the wire mesh member, such that the wire mesh member has at least two layers of the wire mesh member over the entire circumference of the wire mesh member; maintaining the wire mesh member in the reduced orientation with a removable fastener; delivering the wire mesh member into the wellbore of the subterranean well and positioning the wire mesh member within the problem zone of the subterranean well; dissolving the removable fastener so that the wire mesh member moves from the reduced orientation to an installed orientation and an outer surface of the where mesh member engages an inner surface of the wellbore, where in the installed orientation the wire mesh member has an installed outer diameter that is generally equal to the inner diameter of the wellbore, where the end of the wire mesh member has an installed overlap that is less than the circumference of the wire mesh member, such that the wire mesh member has two layers of the wire mesh member over a length of the circumference of the installed overlap and a single layer of the wire mesh member over a remaining circumference, and where the wire mesh member has a residual bending stress; and plugging a plurality of openings of the wire mesh member to prevent a flow of fluid radially through the wire mesh member between the problem zone of the subterranean well and a wire inner bore of the wire mesh member; where moving the wire mesh member from the reduced orientation to the installed orientation causes the end of the wire mesh member to move a distance that is longer than the circumference of the wire mesh member from the reduced orientation overlap to the installed overlap.
12. A system for sealing a problem zone of a subterranean well, the system including: a wire mesh member formed of a rolled wire mesh sheet and having a tubular shape and a plurality of openings and positioned within the problem zone of the subterranean well, where the wire mesh member has: an initial orientation where the wire mesh member has an initial outer diameter that is greater than an inner diameter of the wellbore; a reduced orientation where the wire mesh member has a reduced outer diameter that is less than the inner diameter of the wellbore and where the wire mesh member has an induced bending stress, where an end of the wire mesh member has reduced orientation overlap that is greater than a circumference of the wire mesh member, such that the wire mesh member has at least two layers of the wire mesh member over the entire circumference of the wire mesh member; and an installed orientation where the wire mesh member has an installed outer diameter that is generally equal to the inner diameter of the wellbore, where the end of the wire mesh member has an installed overlap that is less than the circumference of the wire mesh member, such that the wire mesh member has two layers of the wire mesh member over a length of the circumference of the installed overlap and a single layer of the wire mesh member over a remaining circumference, and where the wire mesh member has a residual bending stress; where the wire mesh member is moveable from the reduced orientation to the installed orientation with an outer surface of the wire mesh member engaging an inner surface of the wellbore, the end of the wire mesh member moving a distance that is longer than the circumference of the wire mesh member from the reduced orientation overlap to the installed overlap; and the system further includes a plugging material positioned to plug the plurality of openings and operable to prevent a flow of fluid radially through the wire mesh member.
13. The system of claim 12, further including a removable fastener operable to maintain the wire mesh member in the reduced orientation.
14. The system of claim 13, where the removable fastener is selected from a group consisting of a glue, a weld, and a strap.
15. The system of claim 13, where the removable fastener is dissolvable to move the wire mesh member from the reduced orientation to the installed orientation.
16. The system of claim 12, where the plurality of openings are located between parallel longitudinal wires and parallel cross wires.
17. The system of claim 12, where an entire circumference of the wire mesh member over an entire length of the wire mesh member is plugged with the plugging material.
18. The system of claim 12, where the plugging material is a lost circulation material, where the plurality of openings are sized to be larger than the largest size of the plugging material, and the plugging material is sized to bridge a across the plurality of openings.
19. The system of claim 12, where the wire mesh member is coated with a swellable material and where the plugging material is the swellable material, the swellable material filling the plurality of openings, such that the plurality of openings are sealed around the entire circumference of the wire mesh member so that the wire mesh member forms a solid tubular member.
20. The system of claim 12, where in the installed orientation the wire mesh member has a wire inner bore with an installed inner diameter sized for a drill string to pass through the wire inner bore.
21. A system for sealing a problem zone of a subterranean well, the system including: a wire mesh member having a tubular shape and a plurality of openings and positioned within the problem zone of the subterranean well, where the wire mesh member has: an initial orientation where the wire mesh member has an initial outer diameter that is greater than an inner diameter of the wellbore; a reduced orientation where the wire mesh member has a reduced outer diameter that is less than the inner diameter of the wellbore and where the wire mesh member has an induced bending stress; and an installed orientation where the wire mesh member has an installed outer diameter that is generally equal to the inner diameter of the wellbore and where the wire mesh member has a residual bending stress; where the wire mesh member is moveable from the reduced orientation to the installed orientation with an outer surface of the wire mesh member engaging an inner surface of the wellbore; where in the reduced orientation the wire mesh member is sized to move through a drill string; and the system further includes a plugging material positioned to plug the plurality of openings and operable to prevent a flow of fluid radially through the wire mesh member.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) So that the manner in which the features, aspects and advantages of the embodiments of this disclosure, as well as others that will become apparent, are attained and can be understood in detail, a more particular description of the disclosure may be had by reference to the embodiments thereof that are illustrated in the drawings that form a part of this specification. It is to be noted, however, that the appended drawings illustrate only certain embodiments of the disclosure and are, therefore, not to be considered limiting of the disclosure's scope, for the disclosure may admit to other equally effective embodiments.
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DETAILED DESCRIPTION
(15) The disclosure refers to particular features, including process or method steps. Those of skill in the art understand that the disclosure is not limited to or by the description of embodiments given in the specification. The subject matter of this disclosure is not restricted except only in the spirit of the specification and appended Claims.
(16) Those of skill in the art also understand that the terminology used for describing particular embodiments does not limit the scope or breadth of the embodiments of the disclosure. In interpreting the specification and appended Claims, all terms should be interpreted in the broadest possible manner consistent with the context of each term. All technical and scientific terms used in the specification and appended Claims have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless defined otherwise.
(17) As used in the Specification and appended Claims, the singular forms “a”, “an”, and “the” include plural references unless the context clearly indicates otherwise.
(18) As used, the words “comprise,” “has,” “includes”, and all other grammatical variations are each intended to have an open, non-limiting meaning that does not exclude additional elements, components or steps. Embodiments of the present disclosure may suitably “comprise”, “consist” or “consist essentially of” the limiting features disclosed, and may be practiced in the absence of a limiting feature not disclosed. For example, it can be recognized by those skilled in the art that certain steps can be combined into a single step.
(19) Where a range of values is provided in the Specification or in the appended Claims, it is understood that the interval encompasses each intervening value between the upper limit and the lower limit as well as the upper limit and the lower limit. The disclosure encompasses and bounds smaller ranges of the interval subject to any specific exclusion provided.
(20) Where reference is made in the specification and appended Claims to a method comprising two or more defined steps, the defined steps can be carried out in any order or simultaneously except where the context excludes that possibility.
(21) Looking at
(22) Wellbore 12 can be drilled from surface 14 and into and through various formation zones 22 of subterranean formations. Formation zones 22 can include layers of reservoir that are production zones, such as an uphole production zone 24 and a downhole production zone 26. Formation zones 22 can also include an unstable or loss circulation zone, such as problem zone 28. In the example embodiments of
(23) The formation zones 22 can be at an elevation of uncased open hole bore 30 of subterranean well 10. Drill string 16 can pass though cased bore 32 of subterranean well 10 in order to reach uncased open hole bore 30. Alternately, the entire wellbore 12 can be an uncased open hole bore.
(24) In order to support the sidewall of wellbore 12 at problem zone 28 and further prevent the flow of fluids radially between wellbore 12 and problem zone 28, a system for sealing problem zone 28 of subterranean well 10 can be installed within wellbore 12. The system for sealing problem zone 28 of subterranean well 10 can include wire mesh member 34.
(25) Looking at
(26) Wire mesh member 34 has a plurality of openings 38. Each of the openings 38 can have a size in a range of a number of millimeters (mm). In an example embodiment each of the openings 38 can have a size in a range of 1 mm to 5 mm. In alternate embodiments an opening 38 can have a size that is smaller than 1 mm or larger than 5 mm. Wire mesh member 34 can be formed of a thin wire mesh having parallel longitudinal wires 40 and parallel cross wires 42. Wire mesh member 34 can have a thickness in a range of a number of mm. In an example embodiment wire mesh member 34 can have a thickness in a range of 1 mm to 5 mm. In alternate embodiments wire mesh member 34 can have a thickness that is smaller than 1 mm or larger than 5 mm.
(27) Wire mesh member 34 can be a flexible member formed of a strong and flexible material that enables wire mesh member 34 to bend without deformation. The material used to form wire mesh member can bend, maintain potential energy in a bent configuration, and return to an original shape when unbent. The material that forms wire mesh member 34 will withstand downhole conditions such as formation pressure and temperature, wellbore hydrostatic pressure and formation fluids such hydrocarbon and corrosive fluids such hydrogen sulfide and carbon dioxide. The material forming wire mesh member 34 can also have an internal yield pressure that can withstand the temperature and pressure of a downhole environment, while having a Young modulus to allow for sufficient flexibility. As an example, wire mesh member can be formed of steel. Alternately, wire mesh member 34 could be formed, for example, of steel alloys, or nickel titanium.
(28) In the Example of
(29) Looking at
(30) In the reduced orientation, wire mesh member 34 has an induced bending stress. If no external force is applied to wire mesh member 34 in the reduced orientation, wire mesh member 34 will expand and return to the initial orientation. Removable fastener 48 can be used to maintain wire mesh member 34 in the reduced orientation so that wire mesh member 34 can be delivered into wellbore 12. Removable fastener 48 can be a tie such as a strap, a weld, glue or other destructible, dissolvable, or disappearing material. In embodiments of this disclosure, removable fastener 48 is a glue, a weld, or a strap that can be dissolved to remove removable fastener 48. Looking at
(31) With wire mesh member 34 in the reduced orientation, wire mesh member 34 can be delivered into wellbore 12 of subterranean well 10. Wire mesh member 34 can be delivered into wellbore 12 with a wireline, coiled tubing, or other cable or tubular member. In alternate embodiments, wire mesh member 34 can be delivered into wellbore 12 by fluid forces of a fluid that is pumped into wellbore 12. In embodiments where there are no internal strings within wellbore 12, wire mesh member 34 can be lowered within or dropped into wellbore 12 alone.
(32) Looking at
(33) Looking at
(34) Wire mesh member 34 can be delivered into wellbore 12 to problem zone 28 of subterranean well 10. In embodiments where wire mesh member 34 can be lowered through drill string 16, the time required to deliver wire mesh member 34 to problem zone 28 is reduced compared to currently available technology that requires the removal of drill string 16 in order to deliver wire mesh member 34 to problem zone 28 of wellbore 12.
(35) After wire mesh member 34 reaches problem zone 28, removable fastener 48 can be removed. In embodiments where removable fastener 48 is dissolvable, removable fastener 48 can be dissolved, such as with the temperature downhole. Alternately a hot fluid, acid, or other fluid capable of weakening, breaking or dissolving removable fastener 48 can be pumped within wellbore 12 to remove removable fastener 48. With the removal of removable fastener 48, wire mesh member will move from the reduced orientation to the installed orientation due to the induced bending stress.
(36) Looking at
(37) Installed outer diameter 52 is less than initial outer diameter 44 so that wire mesh member 34 has a residual bending stress. This residual bending stress of wire mesh member 34 will act radially outwards on the inner diameter surface of wellbore 12, which will help to maintain the position of wire mesh member 34 within problem zone 28 of wellbore 12. In certain embodiments, problem zone 28 is later cased with a casing that is cemented in place so that the residual bending stress is used to maintain the position of wire mesh member 34 until problem zone 28 is cased.
(38) In embodiments of this disclosure, the inner diameter of wellbore 12 at problem zone 28 is not enlarged relative to adjacent portions of wellbore 12. Enlarging the inner diameter of wellbore 12 would require additional time and equipment compared to embodiments of this disclosure where no enlargements of wellbore 12 at problem zone 28 is performed. Because wire mesh member 34 is formed of a thin wire sheet, the inner diameter of wire inner bore 58 of wire mesh member 34 is not significantly smaller than the inner diameter of wellbore 12, therefore wellbore 12 does not have to be enlarged at problem zone 28 in order to install wire mesh member 34. Because wire mesh member 34 is flexible and can conform to the inner surface of wellbore 12, wire mesh member 34 will decrease the inner diameter of wellbore 12 by an amount that is within the tolerance range for the variations in wellbore diameter from normal drilling operations. As an example, a diameter of wellbore 12 can be up to 4% larger than the drill bit used to drill wellbore 12. In embodiments, wire mesh member can decrease the inner diameter of wellbore 12 by an amount that is less than 4% of the diameter of the drill bit used to drill wellbore 12, even when the inner diameter of wellbore 12 is non-uniform.
(39) In order to seal problem zone 28 and prevent the flow of fluids between wellbore 12 and problem zone 28, the plurality of openings 38 can be plugged. With the openings 38 plugged, a flow of fluid radially through wire mesh member 34 is prevented. Plugging openings 38 with plugging material 54 will result sealing around an entire circumference of wire mesh member 34 over an entire length of wire mesh member 34. As a result, wire mesh member 34 will act or be equivalent to a solid blank pipe member.
(40) Looking at
(41) Plugging material 54 can include a product of various shapes and sizes to ensure proper plugging of the wire mesh. In general, biggest size of plugging material 54 will be about one third of the wire mesh opening. As an example, if the wire mesh has an opening size of 5 mm, plugging material will have a largest size in a range of 1500-2000 micron. Plugging material 54 can include smaller sized material, such as material with a size in a range of 200-500 microns. Plugging material 54 can include fibers, flakes, round, and granules. Plugging material 54 can be formed of calcium carbonate (CaCO3), graphite, nut shells, wood, cotton hulls, and other known types of lost circulation material. Plugging material 54 will be formed of a mixture of types, sizes and shapes is to effectively bridge off openings 38 of wire mesh member 34. The fibers will create a net that can trap other smaller shapers. The larger sized material will plug openings 38 first, then the smaller sized material can fill in the gaps in openings 38.
(42) Looking at
(43) With problem zone 28 sealed and the sidewall of wellbore supported at problem zone 28, operations within subterranean well 10 can continue. As an example, drilling operations within wellbore 12 can be resumed. Looking at
(44) In an example of operation and looking at
(45) When wire mesh member 34 has reached problem zone 28, removable fastener 48 can be removed, such as by being destructed, dissolved, worn out, or by disappearing. In the reduced orientation, wire mesh member 34 has an induced bending stress so that after removable fastener is removed, wire mesh member 34 moves to the installed orientation. In the installed orientation an outer surface of wire mesh member 34 engages an inner surface of wellbore 12. Such engagement retains wire mesh member 34 in position within wellbore 12 at problem zone 28. The openings 38 through wire mesh member 34 can then be plugged, such as with plugging material 54 or swellable material 56. Plugging openings 38 prevents a flow of fluid radially through wire mesh member 34 and supports the sidewall of wellbore 12 at problem zone 28.
(46) Embodiments described in this disclosure therefore provide a thin wire mesh that becomes the equivalent of a solid pipe for sealing and supporting a problem zone. Because the wire mesh is thin, there is no need to enlarge the problem zone of the wellbore. If a minor hole enlargement would be required, then a simple acid or other well treatment can be used to enlarge the wellbore just enough to accommodate the wire mesh member. The bending stress of the wire mesh will be sufficient to retain the wire mesh in the desired position within the wellbore so that no slips or other anchoring elastomers or devices are required to retain the wire mesh.
(47) Embodiments of this disclosure, therefore, are well adapted to carry out the objects and attain the ends and advantages mentioned, as well as others that are inherent. While embodiments of the disclosure has been given for purposes of disclosure, numerous changes exist in the details of procedures for accomplishing the desired results. These and other similar modifications will readily suggest themselves to those skilled in the art, and are intended to be encompassed within the spirit of the present disclosure and the scope of the appended claims.