CN116335580B - External casing packer with bidirectional extrusion sealing function - Google Patents
External casing packer with bidirectional extrusion sealing function Download PDFInfo
- Publication number
- CN116335580B CN116335580B CN202310616983.0A CN202310616983A CN116335580B CN 116335580 B CN116335580 B CN 116335580B CN 202310616983 A CN202310616983 A CN 202310616983A CN 116335580 B CN116335580 B CN 116335580B
- Authority
- CN
- China
- Prior art keywords
- rods
- distributed
- limiting
- extrusion
- adjacent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 109
- 238000007789 sealing Methods 0.000 title claims abstract description 25
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract 2
- 238000010168 coupling process Methods 0.000 claims abstract 2
- 238000005859 coupling reaction Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 31
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000012856 packing Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 239000000872 buffer Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- 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)
- Pipe Accessories (AREA)
Abstract
The invention relates to the technical field of underground packers, in particular to an external casing packer with a bidirectional extrusion sealing function. The utility model provides an external sleeve packer with two-way extrusion sealing function, including the center tube, the center tube rigid coupling has the sleeve of symmetric distribution, the sleeve of symmetric distribution forms the annular draw-in groove of symmetric distribution with the center tube cooperation, be provided with the expansion packing element in the annular draw-in groove of symmetric distribution, the expansion packing element forms annular cavity with the center tube cooperation, the center tube is provided with equidistant and symmetric distribution's of circumference feed liquor hole, the feed liquor hole communicates with annular cavity in with the center tube, sliding connection has the push rod in the feed liquor hole, the push rod articulates there is equidistant distributed connecting rod, equidistant distributed connecting rod articulates there is first stripper, first stripper and expansion packing element cooperation. According to the invention, the plurality of first extrusion plates are simultaneously expanded by extruding the push rods at two sides, so that the inner side wall of the expansion rubber cylinder is uniformly stressed, and the expansion rubber cylinder is gradually expanded to seal the well wall.
Description
Technical Field
The invention relates to the technical field of petroleum underground, in particular to an external casing packer with a bidirectional extrusion sealing function.
Background
The packer is a downhole tool connected to a downhole tubular column and used for sealing and isolating an annular space between an oil pipe and an oil gas well casing or an open hole well wall, and is divided into an expansion type, a compression type, a self-expansion type and the like according to the working mode of the packer, after the packer is lowered to a designed depth, the packer is pressurized from the inside of the oil pipe, high-pressure liquid acts on an inner cavity of a rubber cylinder through a pressure transmission hole in the packer, the rubber cylinder is expanded under the action of throttling pressure difference, and then the well wall is sealed, so that sealing between the casing and the well wall is formed, and the deblocking is realized by the return force shrinkage and reset of the rubber cylinder during the disassembly.
Because environments such as pressure and temperature are complicated in the pit, the rubber cylinder is in the pit for a long time, and the rubber cylinder and the reasons such as the pressure of the environment in the pit are in the same place, when the rubber cylinder is pushed to expand outwards by means of liquid pressure, the rubber cylinder cannot be evenly expanded, the outer side of the rubber cylinder cannot be fully attached to a well wall, the tightness between the well wall and the rubber cylinder is poor, the pressure in the pit is not invariable, after the packer is sealed, if the pressure in the pit is suddenly reduced, the rubber cylinder contracts by means of the tightening force of the rubber cylinder, and the tightness between the packer and the well wall can be influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a buffer type casing external packer with a bidirectional extrusion sealing function.
The technical proposal is as follows: the sleeve pipe external packer with the bidirectional extrusion sealing function comprises a central pipe, wherein a symmetrically-distributed sleeve is fixedly connected with the central pipe, the symmetrically-distributed sleeve is matched with the central pipe to form a symmetrically-distributed annular clamping groove, an expansion rubber cylinder is arranged in the symmetrically-distributed annular clamping groove, the expansion rubber cylinder is matched with the central pipe to form an annular cavity, the central pipe is provided with circumferentially equidistant and symmetrically-distributed liquid inlet holes, the inside of the central pipe is communicated with the annular cavity, push rods are connected in the liquid inlet holes in a sliding manner, sliding connection positions of the push rods and the central pipe are not sealed, push rods are connected with sliding rods in a penetrating manner, piston discs positioned in adjacent liquid inlet holes are fixedly connected with the sliding rods, the piston discs are in sliding fit with the adjacent liquid inlet holes, a first spring is fixedly connected between each piston disc and each adjacent push rod, the push rods are hinged with equidistant-distributed connecting rods, the equidistant-distributed connecting rods are hinged with first extrusion plates, the first extrusion plates are matched with the expansion rubber cylinder, the symmetrically-distributed push rods are provided with limiting mechanisms, and used for locking the symmetrically-distributed push rods, and the circumferentially-distributed first extrusion plates simultaneously expand and push the expansion rubber cylinder outwards;
the limiting mechanism comprises symmetrically distributed lantern rings, the symmetrically distributed lantern rings are respectively connected with adjacent push rods in a rotating mode, torsion springs are fixedly connected between the lantern rings and the adjacent push rods, the torsion force of the torsion springs is smaller than the elasticity of the first springs, one sides, away from the adjacent push rods, of the lantern rings are fixedly connected with L-shaped rods, first inclined faces are arranged on the L-shaped rods, and unlocking components used for releasing limiting the positions between the symmetrically distributed L-shaped rods are arranged on the sliding rods.
Preferably, the piston disc is provided with a sealing ring for increasing the tightness between the piston disc and the inlet opening.
Preferably, the unlocking component comprises a limiting rod, the limiting rod is fixedly connected to one end of the sliding rod, which is far away from the adjacent piston disc, and the lantern ring is provided with a limiting groove matched with the limiting rod.
Preferably, the limit groove is spiral, and the deflection angle of the symmetrically distributed L-shaped rods on the horizontal plane is twice the deflection angle of the upper end and the lower end of the limit groove on the horizontal plane.
Preferably, the longitudinal length of the limiting groove is smaller than the compressed length of the first spring.
Preferably, the expansion mechanism is arranged on the central tube, the expansion mechanism is used for supporting the expansion rubber cylinder, the expansion mechanism comprises support rods distributed at equal intervals in the circumferential direction, the support rods distributed at equal intervals in the circumferential direction are all in sliding connection with the central tube, the support rods are fixedly connected with second extrusion plates, the second extrusion plates distributed at equal intervals in the circumferential direction are distributed with first extrusion plates distributed at equal intervals in the circumferential direction in a staggered mode, second springs are fixedly connected between the second extrusion plates and the central tube, and locking assemblies used for locking the support rods are arranged between adjacent slide rods.
Preferably, the first pressing plate is provided with second inclined surfaces symmetrically distributed, and the second pressing plate is provided with third inclined surfaces matched with adjacent second inclined surfaces.
Preferably, the bending degree of the outer side surface of the first extrusion plate and the bending degree of the outer side surface of the second extrusion plate are equal to the bending degree of the inner side surface of the expansion rubber cylinder after expansion.
Preferably, the locking assembly comprises a fixed ring, the fixed ring is fixedly connected to slide bars which are circumferentially and equidistantly distributed on the upper side, the fixed ring is fixedly connected with limiting clamping columns which are circumferentially and equidistantly distributed, the limiting clamping columns are slidably connected with limiting columns, a third spring is fixedly connected between each limiting column and each adjacent limiting clamping column, and the supporting rods are provided with limiting holes matched with the adjacent limiting columns.
The invention has the following advantages:
1. the push rods at two sides are extruded to enable the plurality of first extrusion plates to expand simultaneously, the inner side wall of the expansion rubber cylinder is uniformly stressed, and the expansion rubber cylinder gradually expands outwards to seal the well wall.
2. When the pressure suddenly drops in the pit, the expansion rubber cylinder cannot shrink under the limit of the first extrusion plate, so that the tightness of the packer is ensured, and the problem that the tightness is poor due to shrinkage of the expansion rubber cylinder expanded in a traditional hydraulic mode is avoided.
3. When the expansion rubber cylinder expands, different positions of the inner wall of the expansion rubber cylinder are subjected to extrusion forces, so that the tightness between the outer side of the expansion rubber cylinder and the well wall is improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the central tube and sleeve of the present invention.
FIG. 3 is a schematic perspective view of the annular cavity and liquid inlet of the present invention.
Fig. 4 is a schematic perspective view of the expansion cylinder and the first extrusion plate of the present invention.
Fig. 5 is a schematic perspective view of the piston disc, seal ring and other parts of the present invention.
Fig. 6 is a schematic perspective view of a limiting mechanism according to the present invention.
Fig. 7 is a schematic perspective view of an unlocking assembly according to the present invention.
Fig. 8 is a schematic perspective view of the limiting groove, the limiting rod and other parts of the invention.
Fig. 9 is a schematic perspective view of the flaring mechanism of the present invention.
Fig. 10 is a schematic perspective view showing an expanded state of the expansion mechanism and the first pressing plate of the present invention.
Fig. 11 is a schematic perspective view showing a closed state of the expansion mechanism and the first pressing plate according to the present invention.
The reference symbols in the drawings: 1-central tube, 101-annular cavity, 102-liquid inlet, 2-sleeve, 3-expansion rubber cylinder, 4-push rod, 5-slide bar, 501-limit rod, 6-piston disc, 601-sealing ring, 7-first spring, 8-connecting rod, 9-first extrusion plate, 901-second inclined plane, 1001-collar, 10011-limit groove, 1002-torsion spring, 1003-L-shaped rod, 10031-first inclined plane, 1101-support bar, 11011-limit hole, 1102-second extrusion plate, 11021-third inclined plane, 1103-second spring, 1104-fixed ring, 1105-limit clamping column, 1106-limit column, 1107-third spring.
Detailed Description
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Example 1: 1-6, including a central tube 1, the central tube 1 is installed at the lower end of the sleeve, the central tube 1 is fixedly connected with two sleeves 2 which are symmetrically distributed up and down, the two sleeves 2 are positioned at the outer side of the central tube 1, the two sleeves 2 are matched with the central tube 1 to form symmetrical distributed annular clamping grooves, an expansion rubber cylinder 3 is arranged in the symmetrical distributed annular clamping grooves, the expansion rubber cylinder 3 is matched with the central tube 1 to form an annular cavity 101, the central tube 1 is provided with liquid inlet holes 102 which are circumferentially equidistant and symmetrically distributed up and down, the liquid inlet holes 102 are L-shaped, the liquid inlet holes 102 are communicated with the annular cavity 101 in the central tube 1, a push rod 4 is connected in a sliding way in the liquid inlet holes 102, the diameter of the push rod 4 is smaller than the aperture of the vertical part of the liquid inlet holes, and the sliding connection part of the push rod 4 and the central tube 1 is not sealed, the push rod 4 is connected with a slide bar 5 in a penetrating sliding way, the slide bar 5 is fixedly connected with a piston disc 6 positioned in an adjacent liquid inlet hole 102, the piston disc 6 is in sliding fit with the adjacent liquid inlet hole 102, the piston disc 6 is provided with a sealing ring 601 for increasing the tightness between the piston disc 6 and the liquid inlet hole 102, a first spring 7 is fixedly connected between the piston disc 6 and the adjacent push rod 4, the push rod 4 is hinged with connecting rods 8 distributed at equal intervals, the connecting rods 8 distributed at equal intervals are hinged with first extrusion plates 9, the gap between the adjacent first extrusion plates 9 is smaller, the first extrusion plates 9 are positioned in an annular cavity 101, the first extrusion plates 9 are matched with the inner side surfaces of the expansion rubber barrels 3, the push rod 4 moves relatively, the push rod 4 drives the adjacent first extrusion plates 9 to expand outwards through the adjacent connecting rods 8, the first extrusion plates 9 in an expanded state form an approximate circular ring, the inner side walls of the expansion rubber barrels 3 are uniformly stressed, gradually expanding outwards to seal the well wall, wherein symmetrically distributed push rods 4 are provided with limiting mechanisms, and the limiting mechanisms are used for locking the symmetrically distributed push rods 4.
As shown in fig. 5-8, the limiting mechanism includes symmetrically distributed collars 1001, the symmetrically distributed collars 1001 are respectively rotationally connected to adjacent push rods 4, the collars 1001 are located at one side of the adjacent push rods 4 away from the adjacent liquid inlet holes 102, torsion springs 1002 are fixedly connected between the collars 1001 and the adjacent push rods 4, torsion forces of the torsion springs 1002 are smaller than elastic forces of the first springs 7, the torsion springs 1002 in an initial state are in a force accumulation state, L-shaped rods 1003 are fixedly connected at one side of the collars 1001 away from the adjacent push rods 4, the L-shaped rods 1003 are provided with first inclined surfaces 10031, the two push rods 4 which are vertically symmetrical drive the L-shaped rods 1003 to relatively move through the collars 1001, when the first inclined surfaces 10031 of the two L-shaped rods 1003 are contacted, the two L-shaped rods 1003 are mutually extruded, the two L-shaped rods 1003 are gradually dislocated, and the slide rods 5 are provided with unlocking components for releasing limiting between the L-shaped rods 1003 which are symmetrically distributed.
As shown in fig. 7 and 8, the unlocking assembly includes a stop lever 501, the stop lever 501 is fixedly connected to one end of the slide bar 5 far away from the adjacent piston disc 6, a stop groove 10011 matched with the stop lever 501 is provided on the inner side wall of the collar 1001, the stop groove 10011 is spiral, the deflection angle of the upper end and the lower end of the stop groove 10011 on the horizontal plane is 15 °, the deflection angle of the symmetrically distributed L-shaped rods 1003 on the horizontal plane is 30 °, and the longitudinal length of the stop groove 10011 is smaller than the compressed length of the first spring 7.
The external sleeve packer is arranged at the lower end of the sleeve and is used for sealing an annular cavity 101 between the sleeve and a well wall, an operator puts the packer into a designated position, a first extruding plate 9 contacts with the inner side wall of an expansion rubber cylinder 3 in an initial state, then injection operation is carried out, the pressure in a central tube 1 is increased, liquid in the central tube 1 enters a liquid inlet hole 102, the pressure borne by the upper surface of an upper piston disc 6 and the lower surface of a lower piston disc 6 is increased simultaneously, two piston discs 6 which are symmetrical up and down relatively move, a sealing ring 601 increases the tightness between the piston discs 6 and the liquid inlet hole 102 in the process of moving the piston discs 6 in the liquid inlet hole 102, the liquid pressure is ensured to act on the piston discs 6, and the two piston discs 6 which are symmetrical up and down on the left side are taken as an example, because the expansion rubber cylinder 3 has a certain tightening force, therefore, the two first springs 7 are compressed first, the upper piston disc 6 moves downwards relative to the upper push rod 4, the lower piston disc 6 moves upwards corresponding to the lower push rod 4, the two push rods 4 do not move relatively, when the two first springs 7 are compressed to a certain value, the two first springs 7 cannot be compressed, as the two piston discs 6 continue to move relatively, the two piston discs 6 drive the push rods 4 to move relatively through the adjacent first springs 7, the two push rods 4 drive the first extrusion plates 9 to move leftwards through the connecting rods 8, the circumferentially distributed first extrusion plates 9 are mutually far away and extrude the inner side wall of the expansion rubber cylinder 3, the middle part of the expansion rubber cylinder 3 expands outwards, the upper end and the lower end of the expansion rubber cylinder 3 move relatively, the upper end of the expansion rubber cylinder 3 moves downwards from the annular clamping groove at the upper side, the lower end of the expansion rubber cylinder 3 moves upwards from the annular clamping groove at the lower side, the depth of the annular clamping groove is limited through the diameter of a well wall, the two ends of the expansion rubber cylinder 3 cannot be moved out of the adjacent annular clamping grooves.
In the process of the relative movement of the two piston discs 6, taking the piston disc 6 on the upper side as an example, the piston disc 6 drives the slide rod 5 to move downwards, the first spring 7 is compressed, the slide rod 5 drives the limit rod 501 to move downwards, the limit rod 501 slides downwards along the limit groove 10011, the limit rod 501 drives the lantern ring 1001 to rotate anticlockwise (in the direction of the top view) through the limit groove 10011, the lantern ring 1001 drives the L-shaped rod 1003 to rotate anticlockwise, the torsion spring 1002 in the force accumulating state gradually resets, when the limit rod 501 is located at the lower part of the limit groove 10011, the lantern ring 1001 rotates anticlockwise by 15 degrees, the L-shaped rod 1003 rotates anticlockwise by 15 degrees relative to the initial position, the torsion spring 1002 completes the reset, and at this time, the limit rod 501 continues to move downwards and slides out of the limit groove 10011, and at this moment, the limit rod 501 is aligned with the lower end inlet of the limit groove 10011 in the vertical direction, because the longitudinal length of the limit rod 10011 is smaller than the compressed length of the first spring 7, therefore when the first spring 7 cannot be compressed, the limit rod 501 is located at the lower side of 1001, the lantern ring 1001, and likewise the lower side of the limit rod 501 is located at the upper side of the lantern ring 1001, and the limit rod 1001, the limit rod is located at a certain distance from the lantern ring 501.
In the process that the upper L-shaped rod 1003 rotates anticlockwise, the lower L-shaped rod 1003 rotates clockwise, finally, hooks of the two L-shaped rods 1003 are aligned in the vertical direction, as the two push rods 4 approach each other, the two push rods 4 drive the L-shaped rods 1003 to move relatively through the sleeve ring 1001, when the first inclined surfaces 10031 of the two L-shaped rods 1003 contact, the two L-shaped rods 1003 squeeze each other, the two L-shaped rods 1003 are gradually dislocated, the sleeve ring 1001 is not limited by the limiting rod 501 because the two limiting rods 501 are not positioned in the adjacent limiting grooves 10011, the two L-shaped rods 1003 drive the adjacent sleeve rings 1001 to rotate respectively, the two torsion springs 1002 store force, when the two L-shaped rods 1003 do not squeeze each other any more, the two torsion springs 1002 are reset, the hooks of the two L-shaped rods 1003 are locked, and the state is shown in fig. 8.
When two L-shaped rods 1003 are spacing each other, the outside of expansion rubber cylinder 3 contacts with the wall of a well, annular cavity between the wall of a well and the sleeve pipe is sealed, make a plurality of first stripper plates 9 expand simultaneously through push rod 4 of extrusion both sides, because the clearance between the adjacent first stripper plates 9 is less, the first stripper plates 9 of expanding the state form approximately circular ring, the inside wall atress of expansion rubber cylinder 3 is even, expand gradually and seal the wall of a well outward, avoid only relying on hydraulic expansion to lead to expansion rubber cylinder 3 to expand incompletely (expansion rubber cylinder 3 receives self and external pressure environment etc. cause, can't prop up completely, and too little deformation can lead to expansion rubber cylinder 3 and the leakproofness of wall of a well inefficacy).
Because the pressure of the injected liquid is not constant, when the liquid pressure suddenly decreases, the tightness of the packer is ensured, the problem that the tightness is poor due to shrinkage of the expansion rubber cylinder 3 expanded in a hydraulic mode in the prior art is avoided, and in order to eliminate the influence of the sudden decrease of the hydraulic pressure, the following operations are performed: because two L-shaped rods 1003 are spacing each other, two push rods 4 are spacing, simultaneously, two push rods 4 carry out spacing through connecting rod 8 to first stripper plate 9, first stripper plate 9 that circumference distributes can not be close to each other, therefore, expansion rubber tube 3 can not take place to shrink, when the hydraulic pressure suddenly drops in center tube 1, two first springs 7 can preferential reset, take the first spring 7 of upside as an example, first spring 7 passes through piston disc 6 and slide bar 5 drive gag lever post 501 and upwards move, because gag lever post 501 is at a certain distance from lantern ring 1001, therefore the gag lever post 501 can not get into in spacing groove 10011, thereby make lantern ring 1001 can not drive adjacent L-shaped rod 1003 to rotate and relieve the spacing, guarantee that first stripper plate 9 supports expansion rubber tube 3, when the liquid appears little range fluctuation in center tube 1, piston disc 6 drives gag lever post 501 through slide bar 5 and reciprocates little range, first spring 7 passes through piston disc 6 and buffers pressure.
When the packer is not required to be sealed, the pressure in the central tube 1 is reduced, the first spring 7 at the left side of the upper part is reset, the piston disc 6 moves upwards relative to the push rod 4, the piston disc 6 drives the limiting rod 501 to move upwards through the sliding rod 5, the limiting rod 501 enters the limiting groove 10011 from the lower end of the limiting groove 10011, the limiting rod 501 drives the lantern ring 1001 to rotate clockwise in the process that the limiting rod 501 slides upwards along the limiting groove 10011, the torsion spring 1002 stores force, the lantern ring 1001 drives the L-shaped rod 1003 to rotate clockwise, the L-shaped rod 1003 at the lower side rotates anticlockwise, when the limiting rod 501 is positioned at the upper part of the limiting groove 10011, the first spring 7 is reset, the torsion spring 1002 is in a force storage state, the limit between the two L-shaped rods 1003 is released, at the moment, the expansion rubber cylinder 3 presses the first extrusion plate 9 by means of self tightening force, the first extrusion plate 9 drives the push rod 4 which is symmetrical up and down to be away from each other through the connecting rod 8, and the sealing between the packer and a well wall is released in the process that the expansion rubber cylinder 3 resets.
Example 2: on the basis of embodiment 1, as shown in fig. 9-11, the device further comprises an external expansion mechanism, the external expansion mechanism is arranged on the central tube 1, the external expansion mechanism is used for supporting the expansion rubber cylinder 3, the external expansion mechanism comprises supporting rods 1101 distributed at equal intervals in the circumferential direction, the supporting rods 1101 distributed at equal intervals are slidably connected on the central tube 1, the supporting rods 1101 are fixedly connected with second extrusion plates 1102, the distance between the second extrusion plates 1102 and the central tube 1 is smaller than the distance between the first extrusion plates 9 and the central tube 1, the first extrusion plates 9 distributed at equal intervals in the circumferential direction are distributed in a staggered mode, the size of the second extrusion plates 1102 is actually smaller than the size of the first extrusion plates 9, in the figure, only the position relation between the second extrusion plates 1102 and the first extrusion plates 9 is conveniently understood, the first extrusion plates 9 are provided with second inclined surfaces 901 distributed symmetrically, the second extrusion plates 1103 are provided with third inclined surfaces 11021 matched with the adjacent second inclined surfaces, the outer side surfaces of the first extrusion plates 1102 and the second extrusion plates 1102 are smaller than the distance between the first extrusion plates 9 and the central tube 1, the outer side surfaces of the second extrusion plates 1102 and the first extrusion plates and the inner side surfaces of the expansion rubber cylinder 3 are bent at equal to the inner side surfaces of the second extrusion plates 3, the expansion rubber cylinder is completely compressed between the inner side surfaces of the expansion rubber cylinder and the second extrusion plates 3 and the inner side surfaces 3 and the expansion cylinder is completely compressed and the inner side surfaces of the expansion cylinder 3 is in a locking state is completely, and the compression assembly is arranged between the compression springs 3 and the compression springs is completely and is completely locked between the compression springs and the compression cylinder 3 and the compression cylinder is in a compression cylinder 3 is in a state is in a sealed between the compression cylinder 3.
As shown in fig. 9, the locking assembly includes a fixed ring 1104, the fixed ring 1104 is fixedly connected to the lower end of the sliding rod 5 circumferentially equidistant from the upper side, the fixed ring 1104 is located on the upper side of the supporting rod 1101, the lower side of the fixed ring 1104 is fixedly connected with spacing clamping columns 1105 circumferentially equidistant from the lower side, the spacing clamping columns 1105 circumferentially equidistant from the sliding rod 5 are alternately distributed, the spacing clamping columns 1105 are slidably connected with spacing columns 1106, a third spring 1107 is fixedly connected between each spacing column 1106 and each adjacent spacing clamping column 1105, the supporting rod 1101 is provided with a spacing hole 11011 matched with each adjacent spacing column 1106, and when each spacing column 1106 is inserted into each spacing hole 11011, the supporting rod 1101 is spacing and cannot move.
In the process of expanding the circumferentially distributed first extrusion plates 9, since the interval between the two adjacent first extrusion plates 9 is gradually increased, the interval between the two adjacent first extrusion plates 9 on the inner side surface of the expansion rubber cylinder 3 cannot be supported, and in order to fill the gap between the two adjacent first extrusion plates 9, the following operations are performed: before the first extrusion plates 9 are expanded, the first extrusion plates 9 distributed at equal intervals in the circumferential direction and the second extrusion plates 1102 distributed at equal intervals in the circumferential direction are in a state as shown in fig. 10, at this time, the distance between two adjacent first extrusion plates 9 is smaller, the second extrusion plates 1102 cannot be clamped between the two adjacent first extrusion plates 9, the distance between the second extrusion plates 1102 and the central tube 1 is smaller than the distance between the first extrusion plates 9 and the central tube 1, in the process of expanding the first extrusion plates 9, taking the second extrusion plates 1102 on the left side as an example, the limit of the second extrusion is released, the second springs 1103 in a compressed state reset, and the second springs 1103 extrude the second extrusion plates 1102 so that the second extrusion plates 1102 are tightly attached to the two adjacent first extrusion plates 9, and the second extrusion plates 1102 drive the supporting rods 1101 to be far away from the central tube 1.
In the process that the symmetrically distributed slide bars 5 are mutually close, the upper slide bar 5 drives the fixed ring 1104 to move downwards, the fixed ring 1104 drives the limit clamping column 1105 to move downwards, the limit clamping column 1105 on the left side is taken as an example, the limit clamping column 1105 drives the limit column 1106 to move downwards through the third spring 1107, before the two L-shaped rods 1003 are not limited mutually, the lower end of the limit column 1106 is contacted with the upper surface of the support rod 1101, at the moment, the limit hole 11011 is positioned on the right side of the limit column 1106, along with the continuous downward movement of the limit clamping column 1105, the third spring 1107 is compressed, in the process that the second extrusion plate 1102 moves leftwards, when the limit hole 11011 is aligned with the limit column 1106, the limit of the limit column 1106 is released, the third spring 1107 resets to drive the limit column 1106 to move downwards and be inserted into the limit hole 11011, the support rod 1101 is limited by the limit column 1106, at the moment, the second extrusion plate 1102 is clamped between the adjacent first extrusion plates 9, the second inclined surface 901 is completely attached to the third inclined surface 11021, the second extrusion plate 1102 fills gaps between the adjacent first extrusion plates 9, the tightness of the space between the adjacent two first extrusion plates 9 on the inner side surface of the expansion rubber cylinder 3 is improved, the second extrusion plates 1102 distributed at equal intervals circumferentially are matched with the first extrusion plates 9 distributed at equal intervals circumferentially to form a complete ring, the state is shown in fig. 11, the bending degree of the outer side surface of the first extrusion plate 9 and the bending degree of the outer side surface of the second extrusion plate 1102 are equal to the bending degree of the inner side surface of the expansion rubber cylinder 3 after expansion, the second extrusion plate 1102 and the first extrusion plate 9 are completely attached to the inner side surface of the expansion rubber cylinder 3, the inner wall of the expansion rubber cylinder 3 is subjected to extrusion forces at different positions, and the tightness between the outer side of the expansion rubber cylinder 3 and the well wall is improved.
When the packer is recovered, the limit between the two L-shaped rods 1003 is not released yet, the upper slide rod 5 moves upwards relative to the push rod 4, the slide rod 5 drives the fixed ring 1104 to move upwards, the fixed ring 1104 drives the limit clamping column 1105 to move upwards, the limit clamping column 1105 drives the limit column 1106 to move upwards through the third spring 1107, the limit column 1106 gradually moves out of the limit hole 11011, the limit column 1106 gradually releases the limit on the support rod 1101, when the limit rod 501 is positioned at the upper part of the limit groove 10011, the limit column 1106 moves out of the limit hole 11011, the limit on the support rod 1101 is released, in the process that the first extrusion plates 9 are mutually close, the first extrusion presses the adjacent second extrusion plates 1102 through the second inclined surfaces 901, the two third inclined surfaces 11021 of the second extrusion plates 1102 are pressed to be gradually close to the central tube 1, the circumferentially distributed second extrusion plates 1102 are mutually close, the circumferentially distributed second extrusion plates 1102 drive the adjacent support rods 1101 to be mutually close, the second springs 1103 are compressed, and after the first extrusion reset, the second extrusion plates 1102 are reset, and the state is completed as shown in fig. 10.
While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made therein without departing from the spirit and scope of the invention as defined in the following claims. Accordingly, the detailed description of the disclosed embodiments is to be taken only by way of illustration and not by way of limitation, and the scope of protection is defined by the content of the claims.
Claims (9)
1. The utility model provides an external sleeve packer with two-way extrusion sealing function, includes center tube (1), and center tube (1) rigid coupling has sleeve (2) of symmetric distribution, characterized by: the sleeve (2) and the central tube (1) which are symmetrically distributed are matched to form an annular clamping groove which is symmetrically distributed, an expansion rubber cylinder (3) is arranged in the annular clamping groove which is symmetrically distributed, the expansion rubber cylinder (3) and the central tube (1) are matched to form an annular cavity (101), the central tube (1) is provided with circumferentially equidistant and symmetrically distributed liquid inlet holes (102), the liquid inlet holes (102) are communicated with the annular cavity (101) in the central tube (1), push rods (4) are connected in a sliding manner in the liquid inlet holes (102), sliding joints of the push rods (4) and the central tube (1) are not sealed, sliding rods (5) are connected in a penetrating manner, piston discs (6) are fixedly connected in adjacent liquid inlet holes (102), the piston discs (6) are in sliding fit with adjacent liquid inlet holes (102), first springs (7) are fixedly connected between the piston discs (6) and the adjacent push rods (4), the connecting rods (8) which are distributed at equal intervals are hinged, the equidistant connecting rods (8) are hinged with first extruding plates (9), the first extruding plates (9) are arranged in a sliding manner, the first extruding plates (9) are arranged in a hinged manner, the equidistant connecting rods (8) are distributed in a sliding manner, and are used for limiting the expansion mechanism (4), the first extrusion plates (9) distributed circumferentially simultaneously expand and push the expansion rubber cylinder (3) to expand;
the limiting mechanism comprises symmetrically distributed lantern rings (1001), the symmetrically distributed lantern rings (1001) are respectively connected with adjacent push rods (4) in a rotating mode, torsion springs (1002) are fixedly connected between the lantern rings (1001) and the adjacent push rods (4), torsion forces of the torsion springs (1002) are smaller than the elastic force of the first springs (7), one sides, far away from the adjacent push rods (4), of the lantern rings (1001) are fixedly connected with L-shaped rods (1003), the L-shaped rods (1003) are provided with first inclined faces (10031), and unlocking components used for releasing limiting between the symmetrically distributed L-shaped rods (1003) are arranged on the sliding rods (5).
2. The external casing packer with bidirectional extrusion sealing function as set forth in claim 1, wherein: the piston disc (6) is provided with a sealing ring (601) for increasing the tightness between the piston disc (6) and the liquid inlet hole (102).
3. The external casing packer with bidirectional extrusion sealing function as set forth in claim 2, wherein: the unlocking component comprises a limiting rod (501), the limiting rod (501) is fixedly connected to one end of the sliding rod (5) far away from the adjacent piston disc (6), and the lantern ring (1001) is provided with a limiting groove (10011) matched with the limiting rod (501).
4. The external casing packer with bidirectional extrusion sealing function as set forth in claim 3, wherein: the limiting groove (10011) is spiral, and the deflection angle of the symmetrically distributed L-shaped rods (1003) on the horizontal plane is twice the deflection angle of the upper end and the lower end of the limiting groove (10011) on the horizontal plane.
5. The external casing packer with the bidirectional extrusion sealing function as set forth in claim 4, wherein: the longitudinal length of the limit groove (10011) is smaller than the compressed length of the first spring (7).
6. The external casing packer with bidirectional extrusion sealing function as set forth in claim 1, wherein: the expansion mechanism is arranged on the central tube (1), the expansion mechanism is used for supporting the expansion rubber cylinder (3), the expansion mechanism comprises support rods (1101) distributed at equal intervals in the circumferential direction, the support rods (1101) distributed at equal intervals in the circumferential direction are slidably connected to the central tube (1), the support rods (1101) are fixedly connected with second extrusion plates (1102), the second extrusion plates (1102) distributed at equal intervals in the circumferential direction are distributed in a staggered mode with first extrusion plates (9) distributed at equal intervals in the circumferential direction, second springs (1103) are fixedly connected between the second extrusion plates (1102) and the central tube (1), and locking assemblies used for locking the support rods (1101) are arranged between adjacent slide rods (5).
7. The external casing packer with the bidirectional extrusion sealing function as set forth in claim 6, wherein: the first extrusion plate (9) is provided with second inclined surfaces (901) which are symmetrically distributed, and the second extrusion plate (1102) is provided with third inclined surfaces (11021) which are matched with the adjacent second inclined surfaces (901).
8. The external casing packer with bidirectional extrusion sealing function as set forth in claim 7, wherein: the bending degree of the outer side surface of the first extrusion plate (9) and the bending degree of the outer side surface of the second extrusion plate (1102) are equal to the bending degree of the inner side surface of the expansion rubber cylinder (3) after expansion.
9. The external casing packer with bidirectional extrusion sealing function as set forth in claim 7, wherein: the locking assembly comprises a fixed ring (1104), the fixed ring (1104) is fixedly connected to a sliding rod (5) which is circumferentially and equidistantly distributed at the upper side, the fixed ring (1104) is fixedly connected with a limiting clamping column (1105) which is circumferentially and equidistantly distributed, the limiting clamping column (1105) is slidably connected with a limiting column (1106), a third spring (1107) is fixedly connected between the limiting column (1106) and the adjacent limiting clamping column (1105), and the supporting rod (1101) is provided with a limiting hole (11011) which is matched with the adjacent limiting column (1106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310616983.0A CN116335580B (en) | 2023-05-29 | 2023-05-29 | External casing packer with bidirectional extrusion sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310616983.0A CN116335580B (en) | 2023-05-29 | 2023-05-29 | External casing packer with bidirectional extrusion sealing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116335580A CN116335580A (en) | 2023-06-27 |
| CN116335580B true CN116335580B (en) | 2023-07-21 |
Family
ID=86891550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310616983.0A Active CN116335580B (en) | 2023-05-29 | 2023-05-29 | External casing packer with bidirectional extrusion sealing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116335580B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116873740B (en) * | 2023-09-05 | 2023-11-14 | 江苏迈奇重工机械有限公司 | Lifting device with locking function |
| CN116906004B (en) * | 2023-09-08 | 2023-11-14 | 山东巨辉石油科技有限公司 | Packer for well cementation |
| CN117703303B (en) * | 2024-02-06 | 2024-04-05 | 东营市华科石油科技开发有限责任公司 | Screw expansion type casing external packer |
| CN117738592B (en) * | 2024-02-21 | 2024-04-16 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion oil pipe with sealing structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101818136B1 (en) * | 2017-09-11 | 2018-01-12 | 셀파이엔씨 주식회사 | Groundwater automatic monitoring apparatus |
| CN109751010A (en) * | 2017-11-06 | 2019-05-14 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | packer |
| CN212317924U (en) * | 2020-05-18 | 2021-01-08 | 大庆市龙兴石油机械有限公司 | Outer packer of expansion sleeve of inner pipe string tool |
| CN114482910A (en) * | 2022-04-16 | 2022-05-13 | 山东恒驰石油装备有限责任公司 | Packer rubber cylinder and packer |
| CN114658386A (en) * | 2022-05-24 | 2022-06-24 | 纬达石油装备有限公司 | Expansion packer and using method thereof |
| CN114718499A (en) * | 2022-03-17 | 2022-07-08 | 江苏柯沣石化机械有限公司 | Reinforced packer for butt joint of oil pipes |
| CN218347362U (en) * | 2022-06-08 | 2023-01-20 | 西安鼎正电气有限公司 | Protection packer packing element with telescopic machanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100170682A1 (en) * | 2009-01-02 | 2010-07-08 | Brennan Iii William E | Inflatable packer assembly |
| FR2958966B1 (en) * | 2010-04-20 | 2016-02-12 | Saltel Ind | METHOD AND DEVICE FOR SEALING A WELL USING AN EXPANDABLE PLUG, PLUG FOR CARRYING OUT THE METHOD, AND EXTRACTOR TOOL FOR REMOVING IT |
-
2023
- 2023-05-29 CN CN202310616983.0A patent/CN116335580B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101818136B1 (en) * | 2017-09-11 | 2018-01-12 | 셀파이엔씨 주식회사 | Groundwater automatic monitoring apparatus |
| CN109751010A (en) * | 2017-11-06 | 2019-05-14 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | packer |
| CN212317924U (en) * | 2020-05-18 | 2021-01-08 | 大庆市龙兴石油机械有限公司 | Outer packer of expansion sleeve of inner pipe string tool |
| CN114718499A (en) * | 2022-03-17 | 2022-07-08 | 江苏柯沣石化机械有限公司 | Reinforced packer for butt joint of oil pipes |
| CN114482910A (en) * | 2022-04-16 | 2022-05-13 | 山东恒驰石油装备有限责任公司 | Packer rubber cylinder and packer |
| CN114658386A (en) * | 2022-05-24 | 2022-06-24 | 纬达石油装备有限公司 | Expansion packer and using method thereof |
| CN218347362U (en) * | 2022-06-08 | 2023-01-20 | 西安鼎正电气有限公司 | Protection packer packing element with telescopic machanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116335580A (en) | 2023-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116335580B (en) | External casing packer with bidirectional extrusion sealing function | |
| DK2652243T3 (en) | Plugging | |
| NO315720B1 (en) | Retractable, expandable packing device with anti-extortion system for sealing a substantially annular space between a cylindrical object and a bore | |
| CN111963098B (en) | Compression packer | |
| CN111927380B (en) | Long-acting double-rubber-barrel double-deblocking expansion packer | |
| CN116084879B (en) | Tail pipe suspension packer with anti-impact function for well cementation | |
| CN102337856A (en) | Novel thermally-expanded extrusion packer for viscous oil steam-injection well | |
| CN109751010A (en) | packer | |
| CN111852383A (en) | Oil field downhole tool packer | |
| US20170241568A1 (en) | Pipe repair apparatus and method | |
| CN111075389B (en) | Packer with radial support function | |
| CN111622708A (en) | Airtight production packer | |
| CN216617470U (en) | Packer(s) | |
| CN211623380U (en) | Packer with radial supporting function | |
| CN219081546U (en) | Packer with long service life | |
| RU2101461C1 (en) | Packer | |
| RU2292442C1 (en) | Interval packer device, hydro-mechanical packer and repression-depression action hydraulic packer (its variants) | |
| CN219495629U (en) | Setting/differential pressure performance testing device of superhigh Wen Jiaotong assembly | |
| CN115217439B (en) | High temperature resistant carbon fiber packing element packer of thermal recovery | |
| CN117090536B (en) | Independent compression type multi-rubber-cylinder packer | |
| CN111502585B (en) | Internal sealing tool for fireflooding | |
| CN116624123B (en) | Underground sealing rubber cylinder for oil and gas field | |
| CN115940075B (en) | Communication cable joint connecting device | |
| CN116906004B (en) | Packer for well cementation | |
| CN115012872A (en) | Packer and method for manufacturing packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |