CN111894512A - Liner hanger assembly and top mechanical expansion type packer thereof - Google Patents
Liner hanger assembly and top mechanical expansion type packer thereof Download PDFInfo
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- CN111894512A CN111894512A CN202010830737.1A CN202010830737A CN111894512A CN 111894512 A CN111894512 A CN 111894512A CN 202010830737 A CN202010830737 A CN 202010830737A CN 111894512 A CN111894512 A CN 111894512A
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- sleeve
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- 238000007789 sealing Methods 0.000 claims abstract description 110
- 238000001125 extrusion Methods 0.000 claims abstract description 13
- 238000010008 shearing Methods 0.000 claims abstract description 12
- 238000012856 packing Methods 0.000 abstract description 28
- 238000010276 construction Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- 238000003825 pressing Methods 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005465 channeling Effects 0.000 description 3
- 230000009194 climbing Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides a liner hanger assembly and a mechanical expansion type packer at the top of the liner hanger assembly, wherein the mechanical expansion type packer comprises a connecting piece which can be broken under the shearing force, a lower joint, a central pipe, a setting push sleeve, a stop ring, an adjusting screw sleeve, a first expansion ring, a first sealing conical ring, a rubber sleeve, a second sealing conical ring and a second expansion ring, wherein the setting push sleeve, the stop ring, the adjusting screw sleeve, the first expansion ring, the first sealing conical ring, the rubber sleeve, the second sealing conical ring and the second expansion ring are sequentially. The first expansion ring and the second expansion ring can expand radially, and the rubber sleeve can climb to the outer circumference of the first sealing conical ring and/or the second sealing conical ring under the extrusion effect to fill the annular space with the radial dimension of the rubber sleeve so as to realize sealing. In the field of oil and gas field drilling engineering technology and equipment downhole operation tools, the liner hanger assembly and the top mechanical expansion type packer thereof change the covering principle of the traditional compression packer, realize the mechanical packing of a thin-wall rubber sleeve into a larger annular space, realize larger displacement well cementation construction, and are beneficial to improving the well cementation quality and the well cementation anti-channeling effect.
Description
Technical Field
The invention relates to the field of oil and gas field drilling engineering technology and equipment downhole operation tools, in particular to a liner hanger assembly for oil and gas field liner cementing construction and a top mechanical expansion type packer thereof.
Background
In liner cementing construction of oil and gas wells, a packer or a liner hanger with a top packer is often used to prevent channeling of oil, gas, water and the like, effectively realize permanent mechanical annular packing and improve cementing quality. At present, the traditional packer structure used in tail pipe cementing construction of oil and gas wells mainly has the structures of compression type, expansion type and the like.
Chinese patent No. CN209430154U discloses a packing formula liner hanger top packing subassembly, including the center tube, top-down has set gradually on the center tube outer wall and has passed power cover, right ring, go up spacer ring, last holding ring, packing element, lower holding ring and lower spacer ring, and this utility model protects sealed packing element better, and annular space packing ability improves to some extent, but its main tail pipe size design research and development below 7 cun belongs to small-size top packing subassembly. Chinese patent No. CN103437734A discloses a packer structure, which comprises a central tube, a base seal cylinder, a rubber cylinder base and a rubber cylinder, wherein the rubber cylinder base comprises an upper rubber cylinder base and a lower rubber cylinder base, the base seal cylinder, the upper rubber cylinder base, the rubber cylinder and the lower rubber cylinder base are sequentially sleeved on the central tube from top to bottom, a self-locking mechanism is arranged between the base seal cylinder and the upper rubber cylinder base, and two ends of the rubber cylinder are respectively and sequentially provided with an end ring and an expansion ring.
Above two patents are more applicable to packing the less annular space, but can not improve the annular space overflow area of liner hanger, and when the annular space further increased, packing pressure was showing and is descending, and the permanent mechanical packing of annular space will lose efficacy, is unfavorable for improving the well cementation quality.
Chinese patent No. CN101173601 discloses a rotatable hydraulic expansion type liner hanger, which realizes the structural integration of liner hanger seat hanging, packer seat sealing and liner releasing, thus leading to the completion of seat hanging, seat sealing and releasing after the replacement of the cement slurry in place, and at this time, in the thickening of cement slurry, once the releasing has a complex condition, the cement slurry cannot be rapidly released, thus causing a serious accident. The patent of China' CN200620010274.X discloses a compensation expansion type water injection packer, which is characterized in that fluid is injected into a rubber barrel to radially expand the rubber barrel and fill an annular space to realize packing, the rubber barrel of the packer is thin, the annular space capable of packing is large, but the packer is complex in structure and high in production and manufacturing cost.
In conclusion, the compression packer in the prior art has the defects of large radial design space, small annular packing gap and incapability of obviously increasing the annular flow area; the expanding packer has the defects of complex structure and high cost.
Disclosure of Invention
The present invention aims to address at least one of the above-mentioned deficiencies of the prior art.
In order to achieve the above object, an aspect of the present invention provides a top mechanical expansion type packer for a liner hanger, which includes a connecting member breakable under a shearing force, a lower joint, a central tube, and a setting push sleeve, a stop ring, an adjusting screw sleeve, a first expansion ring, a first sealing cone ring, a rubber sleeve, a second sealing cone ring, and a second expansion ring, which are sequentially sleeved on the central tube from top to bottom. The connecting piece capable of being broken under the shearing force can fixedly connect the seat sealing push cylinder to the upper end of the central tube and can be broken when the seat sealing push cylinder bears the force from top to bottom. The lower end of the seat seal push cylinder is provided with an inner cavity capable of accommodating the anti-return ring and a part of the upper end of the adjusting screw sleeve, and pushing force can be applied to the adjusting screw sleeve. The check ring can prevent the adjusting screw sleeve from moving towards the seat sealing push cylinder. The first expansion ring is provided with a first expansion part which can deform and expand along the radial direction of the central pipe under the extrusion action of the adjusting screw sleeve and the first sealing conical ring, and the second expansion ring is provided with a second expansion part which can deform and expand along the radial direction of the central pipe under the pressure action of the second sealing conical ring. The first expansion ring and the second expansion ring are high in material strength and can bear high-pressure sealing load. The rubber tube is configured to climb onto the outer circumference of the first sealing conical ring and/or the second sealing conical ring under the squeezing action of the first sealing conical ring and the second sealing conical ring, and the radial dimension of the rubber tube can fill the space between the outer circumference of the first sealing conical ring and/or the second sealing conical ring and the inner circumference of the casing.
Another aspect of the invention provides a liner hanger assembly comprising a liner hanger and a liner hanger top mechanical expansion packer as described above.
Compared with the prior art, the beneficial effects of the invention can include: the seat sealing is convenient, the use is safe, the sealing pressure is high, and the sealing is reliable; the mechanical packing of the thin-wall rubber sleeve for a large annular space is realized, and a liner hanger assembly with the packer structure is adopted before the packer is set, so that the annular space flow area is large; the construction throttling pressure can be reduced, the larger-displacement well cementation construction is realized, the liner cementing and channeling prevention are favorably realized, and the well cementation quality is improved.
Drawings
FIG. 1 shows a schematic of the construction of the liner hanger top mechanical inflatable packer of the present invention.
The labels in the figure are:
1-a central tube, 2-a seat sealing push cylinder, 3-a connecting piece which can be broken under the shearing force, 4-a check ring, 5-an adjusting threaded sleeve, 6-a first expansion ring, 7-a third expansion ring, 8-a sealing ring, 9-a first sealing conical ring, 10-a rubber tube, 11-a second sealing conical ring, 12-a fourth expansion ring, 13-a second expansion ring and 14-a lower joint.
Detailed Description
Hereinafter, the liner hanger assembly and its top mechanical inflatable packer of the present invention will be described in detail with reference to exemplary embodiments. Herein, "first," "second," "third," "fourth," and the like are for convenience of description and for ease of distinction only and are not to be construed as indicating or implying relative importance or a strict order of magnitude.
Example 1
In an exemplary embodiment of the invention, the top mechanical expansion type packer of the liner hanger comprises a connecting piece which can be broken by a shearing force, a lower joint, a central pipe, a setting push sleeve, a check ring, an adjusting screw sleeve, a first expansion ring, a first sealing conical ring, a rubber sleeve, a second sealing conical ring and a second expansion ring which are sequentially sleeved on the central pipe from top to bottom.
The connecting piece that can break by the shearing force can be with the upper end of seat pusher fixed connection to center tube, and can break under the condition that the seat pusher bears the power from top to bottom. Here, from top to bottom means a direction from the upper end to the lower end of the center pipe along the center axis of the center pipe, which is also a state of the center pipe during operation. For example, a shear force breakable connection is provided on the seat pusher and partially embedded in the outer wall of the center tube. As another example, the connection breakable in shear force may be a pin, e.g., a shear pin-nail.
The lower end of the seat seal push cylinder is provided with an inner cavity which can contain the check ring and a part of the upper end of the adjusting screw sleeve, and the seat seal push cylinder can apply a push force from top to bottom to the adjusting screw sleeve by contacting with the outer wall of the part, which is not contained, of the upper end of the adjusting screw sleeve. For example, the inner wall of the lower end of the seat seal pusher and the outer wall of the accommodated part of the upper end of the adjusting screw sleeve are provided with threads matched with each other, and the outer wall of the non-accommodated part of the upper end of the adjusting screw sleeve is provided with at least one inclined surface with different angles, so that the downward force applied by the seat seal pusher can be reliably transmitted downwards through the adjusting screw sleeve.
The anti-backing ring can prevent the adjusting screw sleeve from moving towards the seat sealing push cylinder. For example, the outer wall of the central tube is provided with first backstop teeth, and the inner wall of the backstop ring is provided with second backstop teeth matched with the first backstop teeth. The first stopping teeth of the stopping ring can only move from top to bottom and cannot move from bottom to top through the matching of the second stopping teeth of the outer pipe wall of the central pipe. Thereby realizing the function of preventing the adjusting screw sleeve from moving from bottom to top, namely preventing the adjusting screw sleeve from retreating. The upper end of the adjusting screw sleeve and the lower end of the anti-backing ring can be provided with a set of chamfers which are matched with each other, such as an inner chamfer at the upper end of the adjusting screw sleeve and an outer chamfer at the lower end of the anti-backing ring. The check ring can effectively control the assembly clearance of each part of the packer, improves the use safety, and can also effectively realize self-locking and check simultaneously, thereby realizing permanent mechanical packing of the packer.
The first expansion ring is provided with a first expansion part which can expand outwards along the radial direction of the central pipe under the action of bearing the extrusion force of the adjusting screw sleeve and the first sealing cone ring. For example, the first expanded portion may have a first inner tapered bore that gradually expands in bore size toward the glue cartridge (which may also be referred to as downward). The first expansion may be a metal or alloy member that is compressed to produce a predetermined amount of radially-expanding deformation. The first inner taper hole can be further provided with a plurality of axially equally-divided narrow gaps on the taper hole wall, so that the first expansion part can better realize stressed expansion deformation. In the use process of the first expansion part, the radial size of the first inner taper hole is expanded and the height size is reduced due to the bearing of extrusion force, so that the first expansion part is changed into an annular belt with a larger diameter due to the radial expansion, and finally the expansion of the first expansion ring is realized. After the first expansion ring expands, the first sealing taper ring or the rubber cylinder can be prevented from sliding out upwards under the action of extrusion force after the seat seal.
The second expansion ring is provided with a second expansion part which can expand outwards along the radial direction of the central pipe under the action of the extrusion force of the second sealing cone ring and the lower joint. For example, the second inflation portion may have a second inner tapered bore that gradually expands in bore size toward the glue cartridge (which may also be referred to as upward). The second expansion may be a metal or alloy member that is compressed to produce a predetermined amount of radially-expanding deformation. The second inner taper hole can be also provided with a plurality of axially equally-divided narrow gaps on the taper hole wall, so that the second expansion part can better realize stressed expansion deformation. In the use process of the second expansion part, the radial size of the second inner taper hole is expanded and the height size is reduced due to the bearing of the extrusion force, so that the second expansion part is changed into an annular belt with a larger diameter due to the radial expansion, and the expansion of the second expansion ring is finally realized. The expansion of the second expansion ring can prevent the second sealing taper ring or the rubber cylinder from sliding out downwards under the action of extrusion force after the seat seal.
The rubber tube is configured to climb to the outer circumferences of the first sealing conical ring and the second sealing conical ring, the outer circumference of the first sealing conical ring or the outer circumference of the second sealing conical ring under the squeezing action of the first sealing conical ring and the second sealing conical ring, and the radial dimension of the rubber tube is set to be capable of just filling up an annular space gap between the first sealing conical ring or the second sealing conical ring and the outer casing after climbing. For example, the rubber cylinder is a ring with an inner chamfer at both ends and a large-gradient inner conical surface, the first sealing conical ring is a ring with an outer chamfer at one end (also called lower end) close to the rubber cylinder, and the second sealing conical ring is a ring with an outer chamfer at one end (also called upper end) close to the rubber cylinder. The matching of the outer chamfer or the large-inclination inner conical surface and the inner chamfer can facilitate the climbing of the rubber cylinder under the extrusion action.
An outer chamfer (also called an inclined plane) can be arranged at one end (also called an upper end) of the first sealing conical ring far away from the rubber cylinder to be matched with the first expansion part of the first expansion ring, so that the first expansion part can be better expanded into a desired shape. The inner wall of the first sealing conical ring can be provided with a sealing ring to achieve a better sealing effect. For example, a first sealing ring is arranged at a first sealing cone ring of the outer wall of the central pipe or a groove is arranged for placing the first sealing ring.
One end (also called lower end) of the second sealing conical ring far away from the rubber cylinder can be provided with an external chamfer angle to be matched with a second expansion part of the second expansion ring, so that the second expansion part can be better expanded into a desired shape. The inner wall of the second sealing conical ring can be provided with a sealing ring to achieve a better sealing effect. For example, a second sealing ring is arranged at the second sealing cone ring of the outer wall of the central pipe or a groove is arranged for placing the second sealing ring.
The lower joint secures the center tube to the liner hanger by connecting the lower end of the center tube to the liner hanger. The lower extreme of lower clutch can be fixed mutually with the liner hanger, and the upper end has the cavity that can hold the center tube, and the screw thread that matches screw thread that sets up through center tube lower extreme outer wall is fixed mutually with the screw thread of this cavity inner wall for lower clutch and center tube can keep relative displacement unchangeable, thereby can provide ascending extrusion force for the second expander under the condition that the seat pusher provided decurrent pressure.
In field use, a liner hanger assembly equipped with the mechanical expansion type packer at the top of the liner hanger of the present invention is lowered into the well. After the preparation of well cementation construction is finished, when cement slurry is injected and replaced, because the annular space overflowing area of the liner hanger assembly is large, construction with large construction displacement can be adopted, so that the construction time is saved, the replacement efficiency of the cement slurry is improved, and the well cementation quality can be improved.
When the cement slurry is finished being injected, the sealing and packing are needed. And pressing the seat seal push cylinder downwards to ensure that the connecting piece which can be broken under the shearing force is broken under the action of the shearing force. And continuously pressing the seat seal push cylinder downwards, and pushing down the first expanding ring, the first sealing conical ring, the rubber cylinder, the second sealing conical ring and the second expanding ring through the adjusting screw sleeve. Under the effect of pressure down, the first inflation portion of first expander and the second inflation portion of second expander can the inflation deformation to prevent the roll-off of first sealed cone ring, packing element and second sealed cone ring. The rubber cylinder expands along the conical surfaces of the first sealing conical ring and the second sealing conical ring and climbs to an annular space gap between the first sealing conical ring and the outer sleeve, an annular space gap between the second sealing conical ring and the outer sleeve or an annular space gap between the first sealing conical ring and the outer sleeve.
In the process of setting, the expansion of the first expansion ring and the second expansion ring and the expansion climbing of the rubber sleeve are synchronously carried out. When the seat sealing push cylinder is pressed down to the right position, the first expansion ring and the second expansion ring are both expanded, an annular space between the central pipe and the outer sleeve can be fully filled, the rubber cylinder can be basically fully filled in annular spaces between the outer sleeve and the first sealing conical ring and between the outer sleeve and the second sealing conical ring without being compressed in the axial direction, and the anti-backing ring and the central pipe are self-locked and anti-backing.
Example 2
The present embodiment is another exemplary embodiment of the present invention, and is a preferable aspect of the present invention, and further includes a third expansion ring and a fourth expansion ring on the basis of embodiment 1.
Referring to fig. 1, the third expander 7 is disposed between the first expander 6 and the first sealing cone 9, and has a third expanded portion that is deformable or expandable in a radial direction of the base pipe 1 by a pressing action. The deformation or expansion of the third expansion portion is easier than that of the first expansion portion. The third expansion part is made of a soft and easily deformable material, such as a copper alloy material. The third expansion part may be in the shape of an inner taper hole, and the taper hole may have a thin-walled trumpet shape with a larger diameter as it approaches the packing element, or may have a cylindrical shape with a flared mouth facing the packing element, or the cylindrical shape may have a larger opening as it approaches the packing element and a smaller opening as it moves away from the packing element. Because of the third inflation portion is changeed deformation than first inflation portion, so the third inflation portion can warp under the squeezing action that receives first expander and first sealed taper ring and fill up the space between first expander and the first sealed taper ring, reach better packing effect.
The fourth expansion ring 12 is disposed between the second expansion ring 13 and the second sealing cone ring 11, and has a fourth expansion portion that can deform or expand in the radial direction of the base pipe 1 by a pressing action. The deformation or expansion of the fourth expansion portion is easier than that of the first expansion portion. The fourth expansion part is made of a soft and easily deformable material, such as a copper alloy material. The fourth expansion part can be in an inner taper hole shape, the taper hole of the fourth expansion part is closer to the rubber cylinder, the diameter of the fourth expansion part is larger, the fourth expansion part can be in a thin-wall trumpet shape, a trumpet opening faces the rubber cylinder, or the fourth expansion part is in a cylinder shape which is closer to the rubber cylinder, the opening of the rubber cylinder is larger, and the opening of the rubber cylinder is farther away from the rubber. Because of the fourth inflation portion is changeed deformation than the second inflation portion, so the fourth inflation portion can warp under the squeezing action that receives second expander and the sealed awl ring of second and fill up the space between second expander 13 and the sealed awl ring of second 11, reach better packing effect.
If a better packing effect is desired, a first sealing ring 8 may be arranged between the inner wall of the first conical sealing ring 9 and the outer wall of the central tube 1, and a second sealing ring may be arranged between the inner wall of the second conical sealing ring 11 and the outer wall of the central tube 1.
The third expansion ring 7, the first expansion ring 6, the fourth expansion ring 12 and the second expansion ring 13 are matched in hardness and hardness, and the strength is complementary, so that the setting is more reliable, an annular seamless protection packer rubber cylinder such as the rubber cylinder 10 is realized, and the packer has stronger supporting force and higher packing pressure.
In field use, a liner hanger assembly equipped with the mechanical expansion type packer at the top of the liner hanger of the present invention is lowered into the well. After the preparation of well cementation construction is finished, when cement slurry is injected and replaced, because the annular space overflowing area of the liner hanger assembly is large, construction with large construction displacement can be adopted, so that the construction time is saved, the replacement efficiency of the cement slurry is improved, and the well cementation quality can be improved.
When the cement slurry is finished being injected, the sealing and packing are needed. The seat sealing push cylinder 2 is pressed downwards, so that the connecting piece 3 which can be broken under the shearing force is broken under the action of the shearing force. And continuously pressing the seat seal push cylinder 2 downwards, and pushing down the first expansion ring 6, the third expansion ring 7, the first sealing conical ring 9, the rubber cylinder 10, the second sealing conical ring 11, the fourth expansion ring 12 and the second expansion ring 13 by adjusting the threaded sleeve 5. Under the action of the downward pressure, the first expansion portion of the first expander 6, the third expansion portion of the third expander 7, the fourth expansion portion of the fourth expander 12, and the second expansion portion of the second expander 13 are subjected to expansion deformation. The first expansion ring 6 and the third expansion ring 7 are overlapped together, the annular surfaces are covered seamlessly, the first sealing conical ring 9 and the rubber cylinder 10 can be prevented from sliding out upwards, the fourth expansion ring 12 and the second expansion ring 13 are overlapped together, and the annular surfaces are covered seamlessly, the second sealing conical ring 11 and the rubber cylinder 10 can be prevented from sliding out downwards. In the process of expanding the first expanding ring 6, the third expanding ring 7, the fourth expanding ring 12 and the second expanding ring 13, the rubber sleeve 10 expands along the conical surfaces of the first sealing conical ring 9 and the second sealing conical ring 11 and climbs to the annular gap between the first sealing conical ring 9 and the outer casing, the annular gap between the second sealing conical ring 11 and the outer casing or the annular gap between the first sealing conical ring 9 and the outer casing and between the second sealing conical ring 11 and the outer casing.
When the seat sealing push cylinder 2 is pressed down to the right position, the first expansion ring 6, the third expansion ring 7, the fourth expansion ring 12 and the second expansion ring 13 are fully expanded, an annular space between the central tube 1 and the outer sleeve can be fully filled, the rubber cylinder 10 can fully fill an annular space between the outer sleeve and the first sealing conical ring 9 and/or the second sealing conical ring 11 basically without compression in the axial direction, and the anti-backing ring 4 and the central tube 1 are self-locked and anti-backing.
In conclusion, the mechanical expansion type packer used for the liner hanger assembly or the top of the liner hanger can realize convenient setting, safe use, high packing pressure and reliable sealing. Meanwhile, the mechanical sealing of a large annular space by using a thin-wall rubber cylinder can be realized. The liner hanger assembly adopting the packer structure before the packer setting has larger annular space overflowing area, can reduce construction throttling pressure, realizes larger displacement well cementation construction, is favorable for realizing liner cementing channeling prevention and improves the well cementation quality.
Claims (8)
1. A mechanical expansion type packer at the top of a tail pipe hanger is characterized by comprising a connecting piece which can be broken under the shearing force, a lower joint, a central pipe, a seat sealing push cylinder, a stop ring, an adjusting threaded sleeve, a first expansion ring, a first sealing conical ring, a rubber cylinder, a second sealing conical ring and a second expansion ring which are sequentially sleeved on the central pipe from top to bottom, wherein,
the connecting piece which can be broken under the shearing force can fixedly connect the seat sealing push cylinder to the upper end of the central tube and can be broken under the condition of bearing the force of the seat sealing push cylinder from top to bottom;
the lower end of the seat seal push cylinder is provided with an inner cavity capable of accommodating a part of the upper ends of the check ring and the adjusting screw sleeve, the seat seal push cylinder can apply thrust to the adjusting screw sleeve, and the check ring can prevent the adjusting screw sleeve from moving towards the seat seal push cylinder;
the first expansion ring is provided with a first expansion part which can deform or expand along the radial direction of the central pipe under the extrusion action of the adjusting screw sleeve and the first sealing cone ring, the second expansion ring is provided with a second expansion part which can deform or expand along the radial direction of the central pipe under the pressure action of the second sealing cone ring, the rubber sleeve is configured to climb onto the outer circumference of the first sealing cone ring and/or the second sealing cone ring under the extrusion action of the first sealing cone ring and the second sealing cone ring, and the radial dimension of the rubber sleeve can fill the space between the outer circumference of the first sealing cone ring and/or the second sealing cone ring and the inner circumference of the sleeve;
the lower joint is configured to connect a lower end of the center tube to a liner hanger.
2. The liner hanger top mechanical expansion packer according to claim 1, wherein the shear force breakable connection is provided on a setting sleeve and embedded in a base pipe, an inner wall of a lower end of the setting sleeve and an outer wall of an upper end of an adjusting nut are provided with matching threads, and the outer wall of the adjusting nut has at least one inclined surface of different angle.
3. The liner hanger top mechanical expansion packer according to claim 1, wherein an outer wall of the base pipe is provided with first backstop teeth, and an inner wall of the backstop ring is provided with second backstop teeth that mate with the first backstop teeth.
4. The liner hanger top mechanical expansion packer of claim 1, wherein the first and second expansions have first and second inner tapered holes, respectively, of gradually expanding bore diameter toward the rubber sleeve.
5. The liner hanger top mechanical expansion packer according to claim 1, further comprising a third expansion ring and/or a fourth expansion ring, wherein the third expansion ring is provided between the first expansion ring and the first sealing cone ring, and has a third expansion portion that is deformable and expandable in a radial direction of the base pipe by a squeezing action, and the deformation and expansion of the third expansion portion are easier than those of the first expansion portion; the fourth expansion ring is arranged between the second sealing cone ring and the second expansion ring and is provided with a fourth expansion part which can deform and expand along the radial direction of the central pipe under the extrusion action, and the deformation and the expansion of the fourth expansion part are easier than those of the second expansion part.
6. The liner hanger top mechanical expansion packer according to claim 5, wherein the third and/or fourth inflation section has a third and fourth inner tapered hole, respectively, having a hole diameter gradually expanding toward the rubber sleeve.
7. The liner hanger top mechanical expansion packer of claim 1, further comprising a first seal ring disposed between an inner wall of the first seal cone ring and an outer wall of the base pipe, and a second seal ring disposed between an inner wall of the second seal cone ring and an outer wall of the base pipe.
8. A liner hanger assembly with a mechanical expansion packer, the liner hanger assembly comprising a liner hanger, wherein the liner hanger assembly further comprises the liner hanger top mechanical expansion packer of any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830737.1A CN111894512B (en) | 2020-08-18 | 2020-08-18 | Tail pipe hanger assembly and top mechanical expansion packer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830737.1A CN111894512B (en) | 2020-08-18 | 2020-08-18 | Tail pipe hanger assembly and top mechanical expansion packer thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111894512A true CN111894512A (en) | 2020-11-06 |
| CN111894512B CN111894512B (en) | 2024-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010830737.1A Active CN111894512B (en) | 2020-08-18 | 2020-08-18 | Tail pipe hanger assembly and top mechanical expansion packer thereof |
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| CN (1) | CN111894512B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112253021A (en) * | 2020-11-25 | 2021-01-22 | 中国石油天然气集团有限公司 | Liner hanger and anti-abrasion sealing structure thereof |
| CN114458222A (en) * | 2022-02-15 | 2022-05-10 | 大庆长垣能源科技有限公司 | Oil gas engineering integration well completion system |
| CN115977578A (en) * | 2022-11-30 | 2023-04-18 | 中国石油天然气集团有限公司 | Liner cementing tool assembly and composite sealing packer thereof |
| CN116446820A (en) * | 2023-04-27 | 2023-07-18 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
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| US20090200041A1 (en) * | 2008-02-07 | 2009-08-13 | Halliburton Energy Services, Inc. | Expansion Cone for Expandable Liner Hanger |
| CN202325389U (en) * | 2011-10-13 | 2012-07-11 | 中国石油化工股份有限公司 | Top packer for tail pipe |
| CN103437734A (en) * | 2013-09-22 | 2013-12-11 | 中国石油集团川庆钻探工程有限公司 | Packer structure |
| CN104005729A (en) * | 2013-02-21 | 2014-08-27 | 中国石油化工股份有限公司 | Metal expansion type tail tube top packer |
| CN212389306U (en) * | 2020-08-18 | 2021-01-22 | 中国石油天然气集团有限公司 | Liner hanger assembly and top mechanical expansion type packer thereof |
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| US20090200041A1 (en) * | 2008-02-07 | 2009-08-13 | Halliburton Energy Services, Inc. | Expansion Cone for Expandable Liner Hanger |
| CN202325389U (en) * | 2011-10-13 | 2012-07-11 | 中国石油化工股份有限公司 | Top packer for tail pipe |
| CN104005729A (en) * | 2013-02-21 | 2014-08-27 | 中国石油化工股份有限公司 | Metal expansion type tail tube top packer |
| CN103437734A (en) * | 2013-09-22 | 2013-12-11 | 中国石油集团川庆钻探工程有限公司 | Packer structure |
| CN212389306U (en) * | 2020-08-18 | 2021-01-22 | 中国石油天然气集团有限公司 | Liner hanger assembly and top mechanical expansion type packer thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253021A (en) * | 2020-11-25 | 2021-01-22 | 中国石油天然气集团有限公司 | Liner hanger and anti-abrasion sealing structure thereof |
| CN114458222A (en) * | 2022-02-15 | 2022-05-10 | 大庆长垣能源科技有限公司 | Oil gas engineering integration well completion system |
| CN115977578A (en) * | 2022-11-30 | 2023-04-18 | 中国石油天然气集团有限公司 | Liner cementing tool assembly and composite sealing packer thereof |
| CN116446820A (en) * | 2023-04-27 | 2023-07-18 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
| CN116446820B (en) * | 2023-04-27 | 2023-10-31 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
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|---|---|
| CN111894512B (en) | 2024-08-27 |
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