CN114922585B - Packer, application of packer and related system - Google Patents
Packer, application of packer and related system Download PDFInfo
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- CN114922585B CN114922585B CN202210247428.0A CN202210247428A CN114922585B CN 114922585 B CN114922585 B CN 114922585B CN 202210247428 A CN202210247428 A CN 202210247428A CN 114922585 B CN114922585 B CN 114922585B
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- packer
- umbrella stand
- rubber cylinder
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- 230000008093 supporting effect Effects 0.000 claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000009471 action Effects 0.000 claims abstract description 24
- 238000012856 packing Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 239000002585 base Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
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- 238000000576 coating method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
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Classifications
-
- 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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/127—Packers; Plugs with inflatable sleeve
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a packer, application of the packer and a related system, wherein the packer comprises: a central tube and a packing mechanism; the packing mechanism includes: at least one supporting component and at least one rubber cylinder which is abutted with the supporting component; the rubber cylinder is nested outside the supporting component; the support assembly includes: the first umbrella stand, the second umbrella stand and the umbrella ribs; the first umbrella stand and the second umbrella stand are respectively nested outside the central tube, the umbrella ribs are distributed on the outer surface of the central tube, and the rubber cylinder is wrapped on the outer surface of the umbrella ribs; the first umbrella stand moves close to the second umbrella stand along the axial direction of the central pipe under the action of external force so as to compress the umbrella ribs, so that one end of the umbrella ribs close to the second umbrella stand is lifted, the umbrella ribs open the rubber cylinder, and the rubber cylinder stores force; under the action of resilience force and external force of the rubber cylinder, the first umbrella stand moves away from the second umbrella stand along the central shaft direction so as to reset the rubber cylinder. Setting is achieved through expanding and extruding the rubber cylinder, and compared with a single expansion type packer and a single compression type packer, the sealing effect of the packer is better.
Description
Technical Field
The invention relates to the technical field of well drilling and completion tools or oilfield oil extraction equipment, in particular to a packer, application of the packer and a related system.
Background
The packer is a downhole tool connected to a downhole string and used for sealing and isolating an annular space between an oil pipe and an oil-gas well casing or an open hole wall. The setting principle is as follows: lowering the tubular column according to the required setting height, compressing the rubber cylinder when the lowering height or the pressure in the tubular column or the hydraulic pressure reaches the setting requirement, so that the diameter of the rubber cylinder is increased, and sealing and isolating oil, the annular space between the sleeve and the central tube of the packer; deblocking principle: and lifting the tubular column to restore the compression rubber cylinder to enable the support slips to retract and unclamp to finish the deblocking.
The current foreign large-size packer is 10 3/4in×95/8 in, the domestic large-size packer is 9 5/8 in multiplied by 7in, and the large-size packer is commonly used in drilling of a salt cavern hydrogen storage warehouse design. Because the underground of the salt cavern hydrogen storage warehouse has the harsh environmental characteristics of multi-media, strong corrosion, periodic variation and the like, the packer can bear different types of media invasion on an underground tubular column in the use process, and corrosion failure in different forms and degrees is very easy to occur, so that the severe hidden danger is brought to the safe operation of the energy storage warehouse. In addition, the energy storage warehouse has frequent cycle alternation, the pressure and temperature in the well are greatly fluctuated, and the stress change can accelerate the development of corrosion, so that the corrosion fatigue of the pipe column occurs. Under the premise, large-size and oxyhydrogen corrosion-resistant underground pipe columns and tools are developed, the parameters of a large-displacement gas injection and halogen discharge process are optimized, and a high-frequency multiple alternate gas injection and production process technology becomes the development trend of future energy storage warehouse well engineering technology.
Disclosure of Invention
The inventor finds that most of the current packer setting modes are lifting, placing and rotating pipe columns, namely when the packer is in operation, setting is realized through extrusion of an upper joint and a cone or expansion of layered water injection, and the packer is easy to cause the rubber cylinder failure of the packer under the working conditions of long-term pressure fluctuation and uneven stress, so that the long-term long-acting operation of the packer is not facilitated. And the traditional packer has long setting time, complex operation and poor sealing quality. The situation causes great damage to the packer and also causes great influence on the aspect of cost investment. Accordingly, the inventors believe that improvements in packers and setting patterns are necessary to reduce costs and increase production benefits. In view of the above, the present invention has been made to provide a packer, a use of a packer and a related system that overcome or at least partially solve the above problems.
In a first aspect, embodiments of the present invention provide a packer, which may include: the sealing device comprises a central pipe and a sealing mechanism nested on the central pipe;
The packing mechanism may include: at least one supporting component and at least one rubber cylinder which is abutted with the supporting component; the rubber cylinder is nested outside the supporting component; the support assembly is used for supporting the rubber cylinder under the action of external force so that the rubber cylinder seals an open hole well or an oil pipe;
The support assembly may include: the umbrella comprises a first umbrella stand, a second umbrella stand and a plurality of umbrella ribs which are respectively and movably connected with the first umbrella stand and the second umbrella stand;
The first umbrella stand and the second umbrella stand are respectively nested outside the central tube, the umbrella ribs are distributed on the outer surface of the central tube, and the rubber cylinder is wrapped on the outer surface of one end, far away from the first umbrella stand, of the umbrella ribs;
The first umbrella stand moves close to the second umbrella stand along the axial direction of the central tube under the action of external force so as to compress the umbrella ribs, so that one end of the umbrella ribs close to the second umbrella stand is lifted, the umbrella ribs are enabled to prop up the rubber cylinder, and the rubber cylinder stores force; under the action of resilience force and external force of the rubber cylinder, the first umbrella stand moves away from the second umbrella stand along the central shaft direction so as to reset the rubber cylinder.
Optionally, the rib may include: an umbrella rib body and an umbrella rib bracket;
One end of the rib body is movably connected with the first umbrella stand, and the other end of the rib body is abutted with the rubber cylinder;
One end of the umbrella rib support is movably connected with the second umbrella stand, and the other end of the umbrella rib support is movably connected with the umbrella rib body.
Optionally, the support assembly may further include: a plurality of support blocks;
the support block is in butt joint or movable connection with one end of the umbrella rib far away from the first umbrella stand;
The supporting blocks are distributed on the outer surface of the central tube, and the rubber cylinder is wrapped on the outer surface of the supporting blocks;
The supporting block is used for expanding the rubber cylinder under the action of the umbrella rib supporting force.
Optionally, the packing mechanism may include: a support assembly and a rubber cylinder abutted with the support assembly; the first umbrella stand or the second umbrella stand of the supporting component is limited on the central pipe;
the packing mechanism may include: at least two support components and at least two rubber barrels abutted with the support components; the number of the supporting components is even, the supporting components are symmetrically arranged, sealing rings are arranged between adjacent rubber cylinders, and the sealing rings are nested on the outer surface of the central tube; a first umbrella frame of the support assembly remote from the end of the central tube is positioned on the central tube; the number of the supporting components is odd, and the second umbrella frames of the supporting components far away from the end part of the central tube are limited on the central tube.
Optionally, the packer may further include: the fixing mechanism is nested outside the central tube;
The fixing mechanism is used for fixing the packer on the wall of a well of a set open hole well or the sleeve wall of an oil pipe.
Alternatively, the fixing mechanism may include: cone assemblies, slip assemblies, and friction assemblies;
The cone assembly is limited on the central tube, and the slip assembly and the friction assembly are respectively nested outside the central tube; the friction assembly drives the slip assembly to move towards the cone assembly under the friction of the well wall or the casing wall so that the slip assembly is spread out under the reaction force of the cone assembly to be fixed on the well wall or the casing wall.
Optionally, the slip assembly may comprise: a slip base and a slip mounted on the slip base;
the friction assembly comprises a clamp and a plurality of friction blocks;
The slip base is provided with a mounting position, and a plurality of friction blocks are mounted on the mounting position and fixed through the clamp.
Alternatively, the cone assembly may comprise: a cone cap and cone body;
the outer surface of the central tube is provided with a step, and the cone cap is limited on the outer surface of the central tube through the step;
the cone cap is provided with a first annular groove, and the cone body is provided with a second annular groove matched with the first annular groove; the cone cap and the cone body are abutted by the first annular groove and the second annular groove.
Optionally, the cone cap may further be provided with a first mounting hole and a second mounting hole, and the second mounting hole penetrates through the first annular groove; a third mounting hole matched with the second mounting hole can be formed in the cone body, and penetrates through the second annular groove;
the cone cap is fixed on the central tube through the first mounting hole and the mounting piece; the cone body is fixed on the cone cap through the second mounting hole, the third mounting hole and the mounting piece.
Optionally, the packer may further include: the reversing sleeve is arranged on the central tube;
the reversing sleeve is detachably connected with the lower joint in an external mode.
Optionally, at least one spiral groove and a U-shaped groove matched with the spiral groove are arranged at one end, connected with the lower joint, of the reversing sleeve;
the outer surface of the lower joint is provided with a limit column;
The reversing sleeve rotates under the action of external force, so that the limiting column slides to the U-shaped groove along the spiral groove, and the reversing sleeve is connected with the lower connector through the U-shaped groove and the limiting column.
Optionally, the packer may further include: an upper joint detachably connected with the central tube; the upper joint extrudes the first umbrella stand under the action of external force so that the umbrella ribs prop open the rubber cylinder.
In a second aspect, an embodiment of the present invention provides the use of a packer as described in the first aspect in a well completion system or an oilfield recovery system.
In a third aspect, an embodiment of the present invention provides a well completion system comprising a packer as described in the first aspect, wherein a lower joint of the packer is connected to a lower string and an upper joint is connected to an upper string.
In a fourth aspect, an embodiment of the present invention provides an oilfield oil extraction system, including a packer as described in the first aspect, wherein a lower joint of the packer is connected to a lower string, and an upper joint is connected to an upper string.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least the following steps are included:
Embodiments of the present invention provide a packer, applications of the packer, and related systems, the packer may include: the sealing device comprises a central pipe and a sealing mechanism nested on the central pipe; the packing mechanism may include: at least one supporting component and at least one rubber cylinder which is abutted with the supporting component; the rubber cylinder is nested outside the supporting component; the support assembly is used for supporting the rubber cylinder under the action of external force so that the rubber cylinder seals an open hole well or an oil pipe; the support assembly may include: the umbrella comprises a first umbrella stand, a second umbrella stand and a plurality of umbrella ribs which are respectively and movably connected with the first umbrella stand and the second umbrella stand; the first umbrella stand and the second umbrella stand are respectively nested outside the central tube, the umbrella ribs are distributed on the outer surface of the central tube, and the rubber cylinder is wrapped on the outer surface of one end, far away from the first umbrella stand, of the umbrella ribs; the first umbrella stand moves close to the second umbrella stand along the axial direction of the central tube under the action of external force so as to compress the umbrella ribs, so that one end of the umbrella ribs close to the second umbrella stand is lifted, the umbrella ribs are enabled to prop up the rubber cylinder, and the rubber cylinder stores force; under the action of resilience force and external force of the rubber cylinder, the first umbrella stand moves away from the second umbrella stand along the central shaft direction so as to reset the rubber cylinder.
According to the packer provided by the embodiment of the invention, the rubber cylinder can be effectively unfolded by the supporting component in the packing mechanism, and meanwhile, the rubber cylinder is extruded by the first umbrella stand and/or the second umbrella stand, so that the rubber cylinder is compressed in the axial direction and the circumferential direction (radius) is enlarged, and the purpose of setting the packer is achieved. The support component in the packer provided by the embodiment of the invention realizes setting through the purposes of expanding and extruding the rubber cylinder, and has better sealing effect compared with the single expansion type and the single compression type in the prior art.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic illustration of a packer provided in an embodiment of the invention;
FIG. 2 is a partial cross-sectional view of a packer provided in an embodiment of the invention;
FIG. 3 is a schematic diagram of the explosive structure of FIG. 1;
FIG. 4 is a cross-sectional view of a support assembly provided in an embodiment of the present invention in an undeployed state;
FIG. 5 is a cross-sectional view of a support assembly according to an embodiment of the present invention in an expanded state;
FIG. 6 is a schematic illustration of the construction of a cone assembly provided in an embodiment of the present invention;
wherein 1 is a central tube; 2 is a packing mechanism; 3 is a fixing mechanism; 4 is a reversing sleeve; 5 is a lower joint; 6 is an upper joint;
11 is a step;
21 is a supporting component; 22 is a rubber cylinder; 211 is a first umbrella frame; 212 is a second umbrella frame; 213 is an umbrella rib; 214 is a supporting block; 2131 is an umbrella rib body; 2132 is an umbrella rib bracket; 23 is a sealing ring;
31 is a cone assembly; 32 is a slip assembly; 33 is a friction assembly; 311 is a cone cap; 312 is a cone body; 321 is a slip base; 322 is a slip; 331 is a clamp; 332 is a friction block; 3111 is a first annular groove; 3112 is a first mounting hole; 3113 is a second mounting aperture; 3121 is a second annular groove; 3122 is a third mounting hole; 3211 is an installation site;
41 is a spiral groove; 42 is a U-shaped groove; 51 is a stopper.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," "rear," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In an embodiment of the present invention, a packer is provided, as shown in fig. 1 to 3, and the packer may include: a central tube 1, and a packing mechanism 2 nested on the central tube 1;
the packing mechanism 2 may include: at least one support assembly 21 and at least one rubber cylinder 22 abutting against the support assembly 21; the rubber cylinder 22 is nested outside the supporting component 21; the support assembly 21 stretches the rubber cylinder 22 under the action of external force so that the rubber cylinder 22 seals an open hole well or an oil pipe;
The support assembly 21 may include: a first umbrella stand 211, a second umbrella stand 212, and a plurality of ribs 213 movably connected to the first umbrella stand 211 and the second umbrella stand 212, respectively;
The first umbrella stand 211 and the second umbrella stand 212 are respectively nested outside the central tube 1, umbrella ribs 213 are distributed on the outer surface of the central tube 1, and rubber cylinder 22 wraps the outer surface of one end, far away from the first umbrella stand 211, of the umbrella ribs 213;
the first umbrella stand 211 moves close to the second umbrella stand 212 along the axial direction of the central tube 1 under the action of external force, so as to compress the umbrella ribs 213, so that one end of the umbrella ribs 213 close to the second umbrella stand 212 is lifted, and the umbrella ribs 213 open the rubber cylinder 22 and store the force of the rubber cylinder 22; the first umbrella stand 211 moves away from the second umbrella stand 212 along the central axis direction under the action of the resilience force and the external force of the rubber tube 22, so that the rubber tube 22 is reset.
The working principle of the packer in the embodiment of the invention is as follows: in the setting process, the first umbrella stand is extruded under the action of external force, so that the first umbrella stand is close to the second umbrella stand, and then the umbrella ribs are compressed, so that one end of each umbrella rib is lifted, and then the rubber cylinder is opened, and the rubber cylinder seals an open hole well or an oil pipe (a sleeve pipe); in the deblocking process, the external force is gradually reduced, and the rubber cylinder compresses the umbrella ribs under the action of resilience force so as to lead the first umbrella stand to be far away from the second umbrella stand, and then the rubber cylinder is reset, and the deblocking is completed.
According to the packer provided by the embodiment of the invention, the rubber cylinder can be effectively unfolded by the supporting component in the packing mechanism, and meanwhile, the rubber cylinder is extruded by the first umbrella stand and/or the second umbrella stand, so that the rubber cylinder is compressed in the axial direction and the circumferential direction (radius) is enlarged, and the purpose of setting the packer is achieved. The support component in the packer provided by the embodiment of the invention realizes setting through the purposes of expanding and extruding the rubber cylinder, and has better sealing effect compared with the single expansion type and the single compression type in the prior art.
It should be noted that the ribs can be uniformly distributed on the outer surface of the central tube, so that the supporting effect is more uniform, and the purpose of uniform setting is achieved.
In an alternative embodiment, referring to fig. 4 and 5, where fig. 4 is a cross-sectional view of the support assembly in an undeployed state and fig. 5 is a cross-sectional view of the support assembly in a deployed state, rib 213 can include: rib body 2131 and rib bracket 2132;
one end of the rib body 2131 is movably connected with the first umbrella stand 211, and the other end is abutted with the rubber cylinder 22;
one end of the rib bracket 2132 is movably connected with the second umbrella stand 212, and the other end is movably connected with the rib body 2131.
It should be noted that, the above-mentioned active connection in the embodiment of the present invention includes, but is not limited to, the following connection modes: hole axis connection, articulation, etc. The other end of the rib support is movably connected with the rib body, and as a person skilled in the art can understand, the end of the rib support is not connected with the end of the rib body, and as the end of the rib body needs to be lifted to open the rubber cylinder in the embodiment of the invention, the end of the rib support can be movably connected with the middle part of the rib body.
In an alternative embodiment, the inventor finds that the existing umbrella ribs, especially the structure of the umbrella rib body, are mostly long-strip-shaped, and the rubber barrel is made of rubber, and when the long-strip-shaped umbrella rib body directly acts on the rubber barrel, the rubber barrel is easy to puncture, so that the sealing effect is poor. Therefore, the inventor adds a baffle-shaped component on the contact surface of the umbrella rib body and the rubber cylinder so as to effectively protect the rubber cylinder in a state of expanding the rubber cylinder. Referring also to fig. 4 and 5, the support assembly 21 may further include: a plurality of support blocks 214;
the supporting block 214 is in abutting connection or movable connection with one end of the umbrella rib 213 far away from the first umbrella stand 211; the support blocks 214 are distributed on the outer surface of the central tube 1, and the rubber cylinder 22 is wrapped on the outer surface of the support blocks 214; the support block 214 expands the rubber cylinder 22 under the supporting force of the umbrella ribs 213.
It should be noted that, the supporting block and the rib (rib body) are preferably movably connected, so as to avoid the occurrence of the accident that the supporting block is easy to fall off. Specifically, the support block is provided with a groove, and a connecting hole connected by a hole shaft is arranged in the groove, so that the umbrella rib body is in hole shaft type movable connection or hinged movable connection with the support block.
It should be noted that, in the embodiment of the invention, the surface of the supporting block, which is in butt joint with the rubber cylinder and the central tube, is arc-shaped, so that the structure can not only effectively support the rubber cylinder, but also avoid abrupt damage to the rubber cylinder at the sharp angle of the plate-shaped structure.
In an alternative embodiment, the support assembly and the corresponding rubber sleeve in the embodiment of the present invention may be at least one group, or may be multiple groups, for example, two groups, three groups, etc., and the number of the groups may be adjusted according to the length of the central tube and the tightness requirement of the setting. For example, the packing mechanism may include: the rubber cylinder is abutted with the support assembly; the first umbrella stand or the second umbrella stand of the supporting component is limited on the central tube; the first umbrella stand and the second umbrella stand are used for supporting and installing umbrella ribs, and when in setting, the setting can be realized only by compressing the distance between the first umbrella stand and the second umbrella stand, so that any one of the first umbrella stand or the second umbrella stand is limited on the central tube.
Also for example, the packing mechanism includes: at least two support components and at least two rubber barrels abutted with the support components; the number of the supporting components is even, the supporting components are symmetrically arranged, sealing rings 23 (shown in reference to figure 2) are arranged between adjacent rubber cylinders, and the sealing rings are nested on the outer surface of the central tube; the first umbrella stand of the supporting component far away from the end part of the central tube is limited on the central tube; the number of the supporting components is odd, and the second umbrella frames of the supporting components far away from the end part of the central tube are limited on the central tube.
In an alternative embodiment, referring to FIGS. 1-3, the packer may further comprise: a fixing mechanism 3 nested outside the central tube 1;
The securing mechanism 3 is used to secure the packer to the wall of the borehole being set or to the casing wall of the tubing.
In an alternative embodiment, referring to fig. 1 to 3, the fixing mechanism 3 includes: cone assembly 31, slip assembly 32, and friction assembly 33;
Cone assembly 31 is limited on central tube 1, slip assembly 32 and friction assembly 33 are nested outside central tube 1 respectively; the friction assembly 33 drives the slip assembly 32 toward the cone assembly 31 under the friction of the borehole wall or casing wall to hold the slip assembly 32 open against the borehole wall or casing wall under the reaction force of the cone assembly 31.
In an alternative embodiment, and with reference to FIGS. 2 and 3, the slip assembly 32 may comprise: a slip base 321 and a slip 322 mounted on the slip base 321;
the friction pack 33 may include a yoke 331 and a plurality of friction blocks 332;
The slip base 321 is provided with a mounting location 3211, and a plurality of friction blocks 332 are mounted on the mounting location 3211 and are fixed by a clip 331.
It should be noted that, the slip in the embodiment of the present invention may include components such as a slip body (slip teeth) and a slip spring (leaf spring), which may refer to a slip structure in the prior art, and the embodiment of the present invention is not limited in particular. It should be further noted that the friction assembly according to the embodiments of the present invention may not be mounted on the slip base, and may be disposed in abutment with the slip assembly, for example, the friction block may be annular, which is not particularly limited in this embodiment of the present invention. According to the embodiment of the invention, the structure of the friction block mounting position arranged on the slip base is more stable, and the friction effect is better during use.
The slip assembly in the embodiment of the invention has the effects of guiding and correcting the direction of the pipe column, and avoids the offset of the rubber cylinder, so that the setting effect of the packer is better; meanwhile, the influence of external air pressure on internal air pressure is avoided, and the external air pressure and the internal air pressure are communicated with each other, so that operators can carry out other works on the wellhead.
In an alternative embodiment, and with reference to FIGS. 2, 3 and 6, cone assembly 31 may include: cone cap 311 and cone body 312;
The outer surface of the central tube 1 is provided with a step 11, and the cone cap 311 is limited on the outer surface of the central tube 1 through the step 11;
the cone cap 311 is provided with a first annular groove 3111, and the cone body 312 is provided with a second annular groove 3121 matched with the first annular groove 3111; the cone cap 311 and the cone body 312 are abutted by the first annular groove 3111 and the second annular groove 3121.
In the embodiment of the present invention, the cone cap and the cone body are designed separately, so that the cone cap and the cone body are easy to assemble, disassemble and clean, and the annular groove is convenient to dock the cone cap and the cone body, as shown in fig. 6, the first annular groove 3111 is disposed on the inner surface of the cone cap, and the second annular groove 3121 is disposed on the outer surface of the cone body. Of course, the first annular groove may also be disposed on the outer surface of the cone cap, and the second annular groove may be disposed on the inner surface of the cone body, which is only required to be capable of being connected in a matching manner, which is not particularly limited in the embodiment of the present invention.
In an alternative embodiment, referring to fig. 3 and 6, the cone cap 311 is further provided with a first mounting hole 3112 and a second mounting hole 3113, the second mounting hole 3113 penetrating the first annular groove 3111; the cone body 312 is provided with a third mounting hole 3122 matched with the second mounting hole 3113, and the third mounting hole 3122 penetrates the second annular groove 3121;
The cone cap 311 is fixed to the central tube 1 through the first mounting hole 3112 and a mounting member (not shown in the drawings); the cone body 312 is fixed to the cone cap 311 through the second mounting hole 3113, the third mounting hole 3122, and a mounting member (not shown in the drawings).
The mounting holes in the embodiment of the invention can be used for conveniently mounting the cone assembly in the central tube through bolts, and are convenient to detach after being mounted. It should be noted that, the cone assembly in the embodiment of the present invention may include a cone cap and a cone body, or may be an integrally formed structure, which is not limited in particular by the embodiment of the present invention.
In an alternative embodiment, referring to FIGS. 1-3, the packer may further comprise: a reversing sleeve 4 arranged on the central tube 1; the reversing sleeve 4 is detachably connected with the lower joint 5 in an external mode.
In an alternative embodiment, referring to fig. 1 to 3, at least one spiral groove 41 and a U-shaped groove 42 matching the spiral groove 41 are provided at the end of the reversing sleeve 4 connected to the lower joint 5;
the outer surface of the lower joint 5 is provided with a limit post 51;
After the reversing sleeve 4 rotates under the action of external force so that the limit post 51 slides to the U-shaped groove 42 along the spiral groove 41, the reversing sleeve 4 and the lower joint 5 are connected with the limit post 51 through the U-shaped groove 42.
The connecting structure of the reversing sleeve and the lower joint provided by the embodiment of the invention can facilitate the detachable connection of the packer and the lower pipe column, and the limit column can be quickly connected into the U-shaped groove through the guiding function of the spiral groove, so that the function of quick installation and detachment is realized.
In an alternative embodiment, referring to FIGS. 1-3, the packer may further comprise: an upper joint 6 detachably connected to the center tube 1; the upper joint 6 presses the first umbrella stand 211 under the action of external force, so that the umbrella ribs 213 open the rubber cylinder 22.
It should be noted that, the upper joint in the embodiment of the invention can be in threaded connection with the central pipe, the threaded connection is convenient for an operator to rotate the upper joint, so that the umbrella-shaped support assembly can prop up the rubber cylinder, and meanwhile, certain pressure is applied to the rubber cylinder, so that the rubber cylinder is compressed, the radius is enlarged, and the oil annulus is sealed, thereby realizing the setting of the packer.
The working principle of the fixing mechanism and the reversing sleeve in the embodiment of the invention is as follows: when the well is in the well, the upper part of the packer is connected with the oil pipe compensator, and the reversing sleeve hook is hung on the limit column of the lower joint. After reaching the design degree of depth, lift the oil pipe right-hand member, make spacing post on the lower clutch rotate out the switching-over cover couple, lower oil pipe, at this moment under the frictional action of friction block and sleeve wall or shaft wall, the cone body struts the slips, continue to lower oil pipe, make lower umbrella stand shift up, through the rib transmission, go up the umbrella stand and shift down, squeeze the packing element, the packing element is propped up to the supporting shoe simultaneously, the packing element is compressed gradually, the slips is propped up on the shaft wall by the cone, fix the umbrella stand from top to bottom, pin cone body and center tube relative position, the packing element can not kick-back.
During deblocking, the oil pipe column is lifted up, parts such as the packer jacket and the like are static due to the friction force between the rubber sleeve and the friction block of the casing wall and the well wall or the casing wall, after the upper pressure and the lower pressure of the packer are balanced, the lifting is continued, the slips are released, the rubber sleeve of the packer is restored under the action of elastic force, and the packer is deblocked.
It should be noted that, the outer surfaces of the parts related to the packer in the embodiment of the invention are coated with the anti-chloride ion coating, the anti-chloride ion anticorrosive coating has high bonding strength with metal, is a coating special for preventing chloride ion corrosion, is coated on the metal surface, is not easy to fall off, is easy to repair after falling off, and has high bonding strength with metal. The anti-chloride ion coating has no reaction taste; the anti-corrosion performance is good, and various acid and alkali resistance can be realized; the paint in the embodiment of the invention has less material consumption, and can meet the anti-corrosion requirement with the thickness of 0.6 mm; long service life, which can be more than ten years.
Based on the same inventive concept, the embodiment of the invention also provides application of the packer in a well drilling and completion system or an oil extraction system of an oil field, wherein a lower joint of the packer is connected with a lower tubular column, and an upper joint of the packer is connected with an upper tubular column.
Based on the same inventive concept, the embodiment of the invention also provides a well drilling and completion system, which can comprise the packer, wherein the lower joint of the packer is connected with a lower tubular column, and the upper joint is connected with an upper tubular column.
Based on the same inventive concept, the embodiment of the invention also provides an oilfield oil extraction system, which can comprise the packer.
The principles of the application and the system of the packer in the embodiment of the invention for solving the problems are similar to those of the packer, so that the implementation of the packer can be referred to the implementation of the packer, and the repetition is omitted.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. The present disclosure is not limited to the precise construction that has been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (13)
1. A packer, comprising: the sealing device comprises a central pipe and a sealing mechanism nested on the central pipe;
The packing mechanism includes: at least one supporting component and at least one rubber cylinder which is abutted with the supporting component; the support assembly includes: the umbrella comprises a first umbrella stand, a second umbrella stand, a plurality of umbrella ribs and a plurality of supporting blocks, wherein the umbrella ribs are respectively and movably connected with the first umbrella stand and the second umbrella stand;
The first umbrella stand and the second umbrella stand are respectively nested outside the central tube, and the umbrella ribs and the supporting blocks are distributed on the outer surface of the central tube; the rib includes: an umbrella rib body and an umbrella rib bracket; one end of the umbrella rib body is movably connected with the first umbrella stand, and the other end of the umbrella rib body is abutted or movably connected with the supporting block; one end of the umbrella rib support is movably connected with the second umbrella stand, and the other end of the umbrella rib support is movably connected with the umbrella rib body; the rubber cylinder is wrapped on the outer surface of the supporting block;
The first umbrella stand moves close to the second umbrella stand along the axial direction of the central pipe under the action of external force so as to compress the umbrella ribs, so that one end of the umbrella rib body close to the second umbrella stand is lifted, the umbrella rib body acts on the supporting block to enable the supporting block to open the rubber cylinder, the first umbrella stand and/or the second umbrella stand squeeze the rubber cylinder, and the rubber cylinder stores force and seals an open hole or an oil pipe; under the action of resilience force and external force of the rubber cylinder, the first umbrella stand moves away from the second umbrella stand along the axial direction of the central tube so as to reset the rubber cylinder.
2. The packer of claim 1, wherein:
The packing mechanism includes: a support assembly and a rubber cylinder abutted with the support assembly; the first umbrella stand or the second umbrella stand of the supporting component is limited on the central pipe; or alternatively, the first and second heat exchangers may be,
The packing mechanism includes: at least two support components and at least two rubber barrels abutted with the support components; in the state that the number of the supporting components is even, the supporting components are symmetrically arranged, sealing rings are arranged between adjacent rubber cylinders, and the sealing rings are nested on the outer surface of the central pipe; a first umbrella frame of the support assembly remote from the end of the central tube is positioned on the central tube; and in the odd number of support assemblies, the second umbrella stand of the support assembly far away from the end part of the central tube is limited on the central tube.
3. The packer of claim 1 or 2, wherein the packer further comprises: the fixing mechanism is nested outside the central tube;
The fixing mechanism is used for fixing the packer on the wall of a well of a set open hole well or the sleeve wall of an oil pipe.
4. A packer according to claim 3, wherein the securing mechanism comprises: cone assemblies, slip assemblies, and friction assemblies;
The cone assembly is limited on the central tube, and the slip assembly and the friction assembly are respectively nested outside the central tube; the friction assembly drives the slip assembly to move towards the cone assembly under the friction of the well wall or the casing wall so that the slip assembly is spread out under the reaction force of the cone assembly to be fixed on the well wall or the casing wall.
5. The packer of claim 4, wherein the slip assembly comprises: a slip base and a slip mounted on the slip base;
the friction assembly comprises a clamp and a plurality of friction blocks;
The slip base is provided with a mounting position, and a plurality of friction blocks are mounted on the mounting position and fixed through the clamp.
6. The packer of claim 4, wherein the cone assembly comprises: a cone cap and cone body;
the outer surface of the central tube is provided with a step, and the cone cap is limited on the outer surface of the central tube through the step;
the cone cap is provided with a first annular groove, and the cone body is provided with a second annular groove matched with the first annular groove; the cone cap and the cone body are abutted by the first annular groove and the second annular groove.
7. The packer of claim 6, wherein the cone cap further has a first mounting hole and a second mounting hole disposed therein, the second mounting hole extending through the first annular groove; a third mounting hole matched with the second mounting hole is formed in the cone body, and the third mounting hole penetrates through the second annular groove;
the cone cap is fixed on the central tube through the first mounting hole and the mounting piece; the cone body is fixed on the cone cap through the second mounting hole, the third mounting hole and the mounting piece.
8. The packer of claim 1 or 2, wherein the packer further comprises: the reversing sleeve is arranged on the central tube;
the reversing sleeve is detachably connected with the lower joint in an external mode.
9. The packer of claim 8, wherein an end of the reversing sleeve connected to the lower joint is provided with at least one helical groove and a U-shaped groove matching the helical groove;
the outer surface of the lower joint is provided with a limit column;
The reversing sleeve rotates under the action of external force, so that the limiting column slides to the U-shaped groove along the spiral groove, and the reversing sleeve is connected with the lower connector through the U-shaped groove and the limiting column.
10. The packer of claim 1, wherein the packer further comprises: an upper joint detachably connected with the central tube; the upper joint extrudes the first umbrella stand under the action of external force so that the umbrella ribs prop open the rubber cylinder.
11. Use of a packer according to any one of claims 1-10 in a well completion system or an oilfield recovery system.
12. A well drilling and completion system, comprising the packer according to any one of claims 1-10, wherein a lower joint of the packer is connected to a lower string and an upper joint is connected to an upper string.
13. An oilfield oil extraction system, comprising the packer of any one of claims 1-10, wherein a lower joint of the packer is connected to a lower string, and an upper joint is connected to an upper string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247428.0A CN114922585B (en) | 2022-03-14 | 2022-03-14 | Packer, application of packer and related system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210247428.0A CN114922585B (en) | 2022-03-14 | 2022-03-14 | Packer, application of packer and related system |
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| Publication Number | Publication Date |
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| CN114922585A CN114922585A (en) | 2022-08-19 |
| CN114922585B true CN114922585B (en) | 2024-04-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116906004B (en) * | 2023-09-08 | 2023-11-14 | 山东巨辉石油科技有限公司 | Packer for well cementation |
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| CN102235158A (en) * | 2011-05-26 | 2011-11-09 | 西南石油大学 | Underground annular blowout preventer and assembly process thereof |
| CN204960877U (en) * | 2015-09-21 | 2016-01-13 | 濮阳市东昊机械电子有限公司 | Two anchor packer of mechanical type |
| CN205063891U (en) * | 2015-10-22 | 2016-03-02 | 盐城市弘通石油机械有限公司 | Deep well packer |
| CN105804689A (en) * | 2016-04-20 | 2016-07-27 | 西南石油大学 | Packer |
| CN112031697A (en) * | 2020-11-04 | 2020-12-04 | 东营政阳自动化科技有限公司 | Self-expansion packer with stable anchoring |
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2022
- 2022-03-14 CN CN202210247428.0A patent/CN114922585B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235158A (en) * | 2011-05-26 | 2011-11-09 | 西南石油大学 | Underground annular blowout preventer and assembly process thereof |
| WO2012159466A1 (en) * | 2011-05-26 | 2012-11-29 | 西南石油大学 | Underground annular blowout preventer and assembly process thereof |
| CN204960877U (en) * | 2015-09-21 | 2016-01-13 | 濮阳市东昊机械电子有限公司 | Two anchor packer of mechanical type |
| CN205063891U (en) * | 2015-10-22 | 2016-03-02 | 盐城市弘通石油机械有限公司 | Deep well packer |
| CN105804689A (en) * | 2016-04-20 | 2016-07-27 | 西南石油大学 | Packer |
| CN112031697A (en) * | 2020-11-04 | 2020-12-04 | 东营政阳自动化科技有限公司 | Self-expansion packer with stable anchoring |
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| CN114922585A (en) | 2022-08-19 |
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