CN116950579B - Underground compensator with bidirectional compensation function - Google Patents
Underground compensator with bidirectional compensation function Download PDFInfo
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- CN116950579B CN116950579B CN202311191471.0A CN202311191471A CN116950579B CN 116950579 B CN116950579 B CN 116950579B CN 202311191471 A CN202311191471 A CN 202311191471A CN 116950579 B CN116950579 B CN 116950579B
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 239000000872 buffer Substances 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 230000003139 buffering effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 85
- 239000007788 liquid Substances 0.000 claims description 51
- 239000010720 hydraulic oil Substances 0.000 claims description 36
- 238000003860 storage Methods 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 238000007667 floating Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to the technical field of compensators, in particular to an underground compensator with a bidirectional compensation function. Including fixed cover, fixed cover slip is equipped with the flange ring, fixed cover slip is equipped with the slip cap, fixed ring is installed to the fixed cover, the slip cap rigid coupling has a plurality of dead levers, the dead lever pierces through the fixed ring and rather than sliding connection, a plurality of the dead lever rigid coupling has the slip ring jointly, the slip ring with the rigid coupling has a plurality of first springs between the fixed ring, the slip of flange ring annular array type is equipped with a plurality of sliding blocks, the sliding block with install the second spring between the flange ring. According to the invention, the first spring is used for compensating and buffering the up-and-down floating of the pipe column, the second spring and the sliding block are used for compensating and buffering the circumferential shaking of the pipe column, so that the bidirectional compensation of the pipe column is realized, and the vibration of the pipe column is absorbed and buffered through the buffer mechanism.
Description
Technical Field
The invention relates to the technical field of compensators, in particular to an underground compensator with a bidirectional compensation function.
Background
In the drilling and production process of an oil well or a gas well, a connecting pipe column is often connected with a casing through a downhole compensator, but the pipe column is easy to shake due to the change of factors such as well depth, well liquid weight and the like, wherein the downhole compensator is used for compensating the up-and-down floating of the pipe column, and adjusting the extrusion force applied to a wellhead so as to reduce adverse effects.
However, the existing underground compensator compensates the vertical fluctuation of the pipe column usually through a spring, but because the pipe column shakes and is usually irregular fluctuation, namely the circumferential fluctuation of the pipe column is easy to be transmitted to the sleeve through the underground compensator, the circumferential fluctuation leads to loose connection between the sleeve and the underground compensator, if the circumferential fluctuation is serious, the underground compensator is easy to damage, the service life of equipment is shortened, the working stability of the pipe column is affected, and aiming at the situations, the underground compensator with the bidirectional compensation function is provided to overcome the defects in the prior art.
Disclosure of Invention
The present invention is directed to a downhole compensator with bi-directional compensation, which solves the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a compensator in pit with two-way compensation function, includes fixed cover, fixed cover is equipped with the ring channel, the annular channel slip of fixed cover is equipped with the flange ring, the flange ring is used for the installation sleeve pipe, be equipped with the annular chamber in the fixed cover, the annular intracavity slip of fixed cover is equipped with the slip cover, the slip cover is used for installing the tubular column, the fixed ring is installed to the annular intracavity of fixed cover, slip cover annular array rigid coupling has a plurality of dead levers, the dead lever pierces through the fixed ring and rather than sliding connection, a plurality of the dead lever rigid coupling has the slip ring jointly, the slip ring is located the annular intracavity of fixed cover, the slip ring with annular array rigid coupling has a plurality of first springs between the fixed ring, the annular array slip of flange ring is equipped with a plurality of sliding blocks, the sliding block with install the second spring between the flange ring.
Further, the buffer mechanism is used for buffering impact force between the sleeve and the tubular column, the buffer mechanism is arranged in the fixed sleeve, the buffer mechanism comprises an elastic ring, the elastic ring is fixedly connected to the fixed ring, the fixed sleeve and the sliding sleeve are matched to form a liquid storage cavity, hydraulic oil is filled in the liquid storage cavity, through holes distributed in an annular array are formed in the sliding sleeve, hydraulic oil is filled between the sliding block and the flange ring, and a sealing assembly used for improving tightness between the sliding block and the sliding sleeve is arranged in the fixed sleeve.
Further, the sealing assembly comprises a first sealing ring, the first sealing ring is installed on the sliding sleeve, the first sealing ring is attached to the fixed sleeve, the second sealing ring and the third sealing ring are embedded in the fixed sleeve, and the third sealing ring and the second sealing ring are located on two sides of the sliding sleeve respectively.
Further, the cross section of the first sealing ring is in a right triangle shape and is used for improving the tightness between the fixed sleeve and the sliding sleeve, and the cross sections of the second sealing ring and the third sealing ring are approximately in a trapezoid shape and are used for improving the tightness between the second sealing ring and the fixed sleeve.
Further, the fixed sleeve is provided with a plurality of first liquid guide holes and a plurality of second liquid guide holes in an annular array mode, the first liquid guide holes are used for guiding hydraulic oil in the liquid storage cavity to contact the second sealing ring, and the second liquid guide holes are used for guiding hydraulic oil in the liquid storage cavity to contact the third sealing ring.
Further, the device also comprises a pressurizing mechanism for improving the pressure in the liquid storage cavity, the pressurizing mechanism is arranged on the fixed ring, the fixed ring is provided with first chambers which are symmetrically distributed, the pressurizing mechanism comprises first sliding frames which are symmetrically distributed, the first sliding frames which are symmetrically distributed are respectively arranged in the corresponding first chambers on the fixed ring in a sliding mode, the fixed sleeve is provided with second chambers which are symmetrically distributed, a second sliding frame is arranged in the second chambers of the fixed sleeve in a sliding mode, a third spring is arranged between the second sliding frame and the fixed sleeve, the second sliding frame penetrates through the fixed ring and is in sliding connection with the fixed ring, and the second sliding frame is provided with guide grooves which are matched with the corresponding first sliding frames.
Further, the automatic pressure regulating mechanism is used for keeping the pressure in the liquid storage cavity, the fixed ring is provided with a first cylindrical cavity, the automatic pressure regulating mechanism is arranged in the first cylindrical cavity of the fixed ring, the automatic pressure regulating mechanism comprises a first sliding plate, the first sliding plate is arranged in the first cylindrical cavity of the fixed ring, a second sliding plate is arranged in the first cylindrical cavity of the fixed ring in a sliding mode, the second sliding plate is located on the lower side of the first sliding plate, and a fourth spring is arranged between the first sliding plate and the second sliding plate.
Further, the device also comprises an adjusting mechanism for adjusting the position of the first sliding plate, the first sliding plate is in sliding connection with the fixed ring, the fixed ring is provided with a second cylindrical cavity, the adjusting mechanism is arranged in the second cylindrical cavity of the fixed ring, the adjusting mechanism comprises a third sliding frame, the third sliding frame is arranged in the second cylindrical cavity of the fixed ring in a sliding manner, the fixed ring is provided with a rotating shaft through a one-way bearing in a rotating manner, one end of the rotating shaft is fixedly connected with a bending rod, the third sliding frame is provided with a sliding groove matched with the bending rod, the other end of the rotating shaft is fixedly connected with a swinging plate, the swinging plate is matched with the first sliding plate, and the fixed ring is provided with a plugging assembly which is used for sealing the first cylindrical cavity on the fixed ring.
Further, the plugging assembly comprises a fixing frame fixedly connected to the first cylindrical cavity of the fixing ring, the fixing frame is slidably provided with a sliding plug, a fifth spring is installed between the sliding plug and the fixing frame, the sliding plug is slidably provided with a sliding shell, and a sixth spring is installed between the sliding shell and the sliding plug.
Further, the elastic coefficient of the sixth spring is larger than that of the fifth spring, and the sliding plug is matched with the first cylindrical cavity on the fixed ring.
The beneficial effects of the invention are as follows: according to the invention, the vertical floating of the pipe column is compensated and buffered through the first spring, the circumferential shaking of the pipe column is compensated and buffered through the second spring and the sliding block, so that the bidirectional compensation of the pipe column is realized, the vibration of the pipe column is absorbed and buffered through hydraulic oil in the buffer mechanism, the tightness between the fixed sleeve and the sliding sleeve is improved through the second sealing ring and the third sealing ring in the sealing assembly, the tight fit between the second sealing ring and the third sealing ring and the sliding sleeve is prolonged through the elastic potential energy of the fourth spring in the self-pressure regulating mechanism, the first sliding plate is extruded through the rotation of the swinging plate in the regulating mechanism, the first cylindrical cavity of the sealing fixed ring is sealed by the sliding plug in the sealing assembly, the extrusion force of the hydraulic oil in the liquid storage cavity by the second sliding plate is always kept, and the tightness between the fixed sleeve and the sliding sleeve is prolonged.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a cross-sectional view of the seal assembly of the present invention;
FIG. 4 is a schematic perspective view of the pressurizing mechanism of the present invention;
FIG. 5 is a schematic perspective view of the self-pressure regulating mechanism of the present invention;
fig. 6 is a cross-sectional view of a closure assembly of the present invention.
In the above figures: 1. the casing pipe comprises a casing pipe body, 2, a pipe column, 3, a fixed sleeve, 4, a flange ring, 5, a sliding sleeve, 6, a fixed ring, 7, a fixed rod, 8, a sliding ring, 9, a first spring, 10, a sliding block, 11, a second spring, 12, a liquid storage cavity, 13, a through hole, 14, an elastic ring, 15, a first sealing ring, 16, a second sealing ring, 17, a first liquid guide hole, 18, a third sealing ring, 19, a second liquid guide hole, 20, a first sliding frame, 21, a second sliding frame, 22, a third spring, 23, a first sliding plate, 24, a second sliding plate, 25, a fourth spring, 26, a third sliding frame, 27, a one-way bearing, 28, a rotating shaft, 29, a bending rod, 30, a swinging plate, 31, a fixed frame, 32, a sliding plug, 33, a fifth spring, 34, a sliding shell, 35 and a sixth spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1: the utility model provides a compensator in pit with two-way compensation function, see fig. 1-3, including fixed cover 3, the upper portion of fixed cover 3 is equipped with the ring channel, the ring channel of fixed cover 3 is interior to slide and is equipped with flange ring 4, flange ring 4 is equipped with the rubber circle that is used for improving its and fixed cover 3 between the leakproofness, flange ring 4 is used for installing sleeve pipe 1, the lower part of fixed cover 3 is equipped with the annular chamber, the annular intracavity of fixed cover 3 is slided and is equipped with sliding sleeve 5, the upper portion of sliding sleeve 5 is equipped with the step face, sliding sleeve 5 is used for installing tubular column 2, install fixed ring 6 in the annular chamber of fixed cover 3, fixed ring 6 is located the upper portion of sliding sleeve 5, the annular array rigid coupling of upper end of sliding sleeve 5 has four dead levers 7, dead lever 7 pierces fixed ring 6 and is connected with its sliding, the upper end of four dead levers 7 is fixedly connected with sliding ring 8, sliding ring 8 is located the annular chamber of fixed cover 3 and is located the upside of fixed ring 6, annular array rigid coupling has eight first springs 9 between sliding ring 8 and the fixed ring 6, the annular array is equipped with eight inside annular sliding blocks 10 of flange ring 4 and is equipped with eight sliding blocks 10 and is equipped with the second end of circular arc-shaped sliding block 10, the end is equipped with the protection spring 11.
In the drilling process, an operator gradually puts the pipe column 2 into the casing 1, and is in threaded connection with the sliding sleeve 5 at the tail end of the last pipe column 2, and the flange ring 4 is connected with the casing 1 through bolts, so that the installation of the underground compensator is completed, and drill cuttings and slurry are conveyed to the ground through the pipe column 2 along with the beginning of drilling work.
In the drilling process, the pipe column 2 is correspondingly rocked under the influence of well depth, temperature, pressure and well liquid tightness change, wherein the pipe column 2 drives the sliding sleeve 5 to rock together in the casing 1 in the process of rocking, the sliding sleeve 5 floats up and down in the fixed sleeve 3, meanwhile, the sliding sleeve 5 floats up and down and drives the sliding ring 8 to move together through the four fixed rods 7, the sliding ring 8 floats up and down to enable eight first springs 9 to correspondingly change, the up and down rocking of the pipe column 2 is compensated, and the stability of connection between the pipe column 2 and the casing 1 is guaranteed.
And in the process that the pipe column 2 drives the sliding sleeve 5 and the fixed sleeve 3 to shake circumferentially, the corresponding sliding block 10 moves under the circumferential sliding extrusion of the fixed sleeve 3, the sliding block 10 moves to compress the corresponding second spring 11, and the circumferential sliding of the pipe column 2 is compensated, so that the bidirectional compensation of the pipe column 2 is achieved, the stress and the abrasion suffered by the pipe column 2 are reduced, meanwhile, the deflection and creep of the pipe column 2 are reduced, and the service life of equipment is prolonged.
Example 2: based on embodiment 1, referring to fig. 2-4, the hydraulic pipe column further comprises a buffer mechanism, the buffer mechanism is arranged on the fixed sleeve 3, the buffer mechanism is used for buffering impact force between the casing 1 and the pipe column 2, the buffer mechanism comprises an elastic ring 14, the elastic ring 14 is fixedly connected to the lower side face of the fixed ring 6, the elastic ring 14 is used for buffering the sliding sleeve 5, the fixed ring 6, the fixed sleeve 3 and the sliding sleeve 5 are matched to form a liquid storage cavity 12, at this time, the liquid storage cavity 12 is an annular cavity on the fixed sleeve 3 and located at the lower side of the fixed ring 6, hydraulic oil is filled in the liquid storage cavity 12 and used for absorbing vibration of the pipe column 2, the sliding sleeve 5 is provided with through holes 13 distributed in an annular array, hydraulic oil is filled between the sliding block 10 and the flange ring 4, the fixed sleeve 3 is provided with a sealing component, the sealing component is used for improving sealing performance between the fixed sleeve 3 and the sliding sleeve 5, and double compensation is performed on variation of the pipe column 2 by using the hydraulic oil, the first spring 9 and the second spring 11, and working stability is improved.
Referring to fig. 3 and 4, the sealing assembly includes a first sealing ring 15, the first sealing ring 15 is mounted on the upper surface of the sliding sleeve 5, and the first sealing ring 15 is attached to the fixed sleeve 3, the cross section of the first sealing ring 15 is in a right triangle shape, so as to improve the tightness between the fixed sleeve 3 and the sliding sleeve 5, the fixed sleeve 3 is embedded with a second sealing ring 16 and a third sealing ring 18, the third sealing ring 18 and the second sealing ring 16 are respectively located at two sides of the sliding sleeve 5, the cross sections of the second sealing ring 16 and the third sealing ring 18 are approximately trapezoid, so that the tightness between the second sealing ring 16 and the fixed sleeve 3 is improved, and the service life is prolonged.
Referring to fig. 4 and 5, the fixed sleeve 3 is provided with a plurality of first liquid guiding holes 17 and a plurality of second liquid guiding holes 19 in an annular array, the first liquid guiding holes 17 are used for guiding hydraulic oil in the liquid storage cavity 12 to contact with the second sealing ring 16, the second liquid guiding holes 19 are used for guiding hydraulic oil in the liquid storage cavity 12 to contact with the third sealing ring 18, and in the process of floating the sliding sleeve 5 up and down, the sliding sleeve 5 extrudes hydraulic oil in the liquid storage cavity 12, so that the hydraulic oil extrudes the second sealing ring 16 or the third sealing ring 18 through the first liquid guiding holes 17 or the second liquid guiding holes 19, and the tightness between the sliding sleeve 5 and the fixed sleeve 3 is further improved.
In the process of compensating the shaking change of the pipe column 2, the work is carried out in the same way, but in the process, the hydraulic oil in the liquid storage cavity 12 is blocked by the action of blocking the hydraulic oil in the liquid storage cavity 12, the hydraulic oil in the liquid storage cavity 12 correspondingly flows through eight through holes 13 in the vertical floating process of the sliding sleeve 5, the hydraulic oil absorbs and buffers the vibration on the pipe column 2, meanwhile, the hydraulic oil between the fixed sleeve 3 and the flange ring 4 absorbs and buffers the vibration in the same way, the connection firmness between the flange ring 4 and the sleeve 1 is ensured, and meanwhile, under the limiting action of eight through holes 13, the vertical floating of the sliding sleeve 5 is blocked, namely, the reciprocating change of eight first springs 9 is blocked, the vibration frequency of the first springs 9 is weakened, and the stability of connection between the flange ring 4 and the sleeve 1 is further ensured.
Simultaneously in the process of floating up and down the sliding sleeve 5, under the blocking effect of hydraulic oil, the first sealing ring 15 is tightly attached to the fixed sleeve 3, the tightness between the fixed sleeve 3 and the sliding sleeve 5 is improved, meanwhile, the sliding sleeve 5 floats up and down to push the hydraulic oil, part of the hydraulic oil respectively extrudes the second sealing ring 16 and the third sealing ring 18 through the first liquid guide hole 17 and the second liquid guide hole 19, and under the action of the trapezoid structures of the second sealing ring 16 and the third sealing ring 18, the second sealing ring 16 and the third sealing ring 18 deform and bulge and are tightly attached to the inner side wall and the outer side wall of the sliding sleeve 5, the tightness between the fixed sleeve 3 and the sliding sleeve 5 is further provided, and the stability of conveying well liquid by the tubular column 2 is guaranteed.
Example 3: on the basis of embodiment 2, referring to fig. 4, the hydraulic pump further comprises a pressurizing mechanism, the pressurizing mechanism is arranged on the fixed ring 6, the pressurizing mechanism is used for improving the pressure in the liquid storage cavity 12, the fixed ring 6 is provided with two first chambers which are bilaterally symmetrical, the pressurizing mechanism comprises two first sliding frames 20 which are bilaterally symmetrical, the two first sliding frames 20 are respectively arranged in the corresponding first chambers on the fixed ring 6 in a sliding manner, the upper part of the first sliding frames 20 is in a T shape, the fixed sleeve 3 is provided with two second chambers which are bilaterally symmetrical, the two second chambers are positioned on the inner sides of the two first chambers, the second chambers of the fixed sleeve 3 are slidably provided with a second sliding frame 21, a third spring 22 is installed between the second sliding frames 21 and the fixed sleeve 3, the third spring 22 is positioned in the corresponding second chambers, the second sliding frames 21 penetrate through the fixed ring 6 and are slidably connected with the fixed ring, the second sliding frames 21 are provided with guide grooves, the guide grooves of the second sliding frames 21 are matched with the T-shaped ends of the corresponding first sliding frames 20, when the hydraulic pressure of a well to be conveyed in the pipe column 2 changes, the second sliding frames 21 are enabled to be extruded by the first sliding frames 20, and the hydraulic oil is further extruded by the second sliding frames 20 to move between the first sliding frames 20 and the fixed sleeve 3, and the fixed sleeve 3 is further ensured, and the stability is improved.
When the pressure of the well fluid conveyed in the pipe column 2 changes, the liquid inlet extrudes two second sliding frames 21, the two second sliding frames 21 correspondingly move, the second sliding frames 21 move and compress the corresponding third springs 22, meanwhile, under the extrusion action of the inclined grooves on the second sliding frames 21, the first sliding frames 20 move downwards to pressurize the liquid storage cavity 12, the pressure in the liquid storage cavity 12 is improved, namely hydraulic oil is respectively pressurized to the second sealing ring 16 and the third sealing ring 18 through the first liquid guide holes 17 and the second liquid guide holes 19, the tightness between the fixed sleeve 3 and the sliding sleeve 5 is further improved, and the well fluid conveyed by the pipe column 2 is prevented from flowing into the casing 1.
Example 4: on the basis of embodiment 3, referring to fig. 5 and 6, the hydraulic pump further comprises a self-pressure regulating mechanism, a first cylindrical cavity is arranged at the front part of the fixed ring 6, the self-pressure regulating mechanism is arranged in the first cylindrical cavity of the fixed ring 6 and is used for keeping the pressure in the liquid storage cavity 12, the self-pressure regulating mechanism comprises a first sliding plate 23, the first sliding plate 23 is arranged in the first cylindrical cavity of the fixed ring 6, a second sliding plate 24 is arranged in the first cylindrical cavity of the fixed ring 6 in a sliding manner, the second sliding plate 24 is positioned at the lower side of the first sliding plate 23, a fourth spring 25 is arranged between the first sliding plate 23 and the second sliding plate 24, and the second sliding plate 24 continuously extrudes hydraulic oil in the liquid storage cavity 12 by using the elastic potential energy of the fourth spring 25, so that the tightness between the fixed sleeve 3 and the sliding sleeve 5 is kept.
In the initial state, the first sliding plate 23 keeps fixed relative to the fixed ring 6, meanwhile, the fourth spring 25 is in a contracted state, under the elastic force of the fourth spring 25, the second sliding plate 24 always extrudes hydraulic oil in the liquid storage cavity 12, namely, the hydraulic oil always applies certain pressure to the second sealing ring 16 and the third sealing ring 18, so that the second sealing ring 16 and the third sealing ring 18 always cling to the sliding sleeve 5, the tightness between the fixed sleeve 3 and the sliding sleeve 5 is always kept, and the service life of the device is prolonged.
Example 5: on the basis of embodiment 4, referring to fig. 6, the device further comprises an adjusting mechanism, the first sliding plate 23 is slidably connected with the fixed ring 6, a second cylindrical cavity is arranged at the front part of the fixed ring 6, the second cylindrical cavity is located at the right part of the first cylindrical cavity, the adjusting mechanism is arranged in the second cylindrical cavity of the fixed ring 6, the adjusting mechanism is used for adjusting the position of the first sliding plate 23, the adjusting mechanism comprises a third sliding frame 26, the third sliding frame 26 is slidably arranged in the second cylindrical cavity of the fixed ring 6, the fixed ring 6 is rotatably provided with a rotating shaft 28 through a one-way bearing 27, two ends of the rotating shaft 28 are respectively inserted into the second cylindrical cavity and the first cylindrical cavity, a bending rod 29 is fixedly connected to the right end of the rotating shaft 28, the third sliding frame 26 is provided with a sliding groove, the sliding groove of the third sliding frame 26 is slidably matched with the bending rod 29, a swinging plate 30 matched with the first sliding plate 23 is fixedly connected to the left end of the rotating shaft 28, the fixed ring 6 is provided with a plugging component for sealing the first cylindrical cavity on the fixed ring 6, and the swinging plate 30 is enabled to swing and move by utilizing unidirectional rotation of the one-way bearing 27, so that the swinging plate 30 swings and presses the first sliding plate 23, thereby maintaining the fourth sliding plate 23 and the elastic sealing ring 25 and the sealing ring 18 are kept in contact with the third sealing ring 18.
Referring to fig. 6, the plugging assembly includes a fixing frame 31, the fixing frame 31 is fixedly connected to the lower portion of the first cylindrical cavity on the fixing ring 6, the fixing frame 31 is slidably provided with a sliding plug 32, the upper portion of the sliding plug 32 is in a circular truncated cone shape, an annular inclined surface matched with the sliding plug 32 is arranged at the lower portion of the first cylindrical cavity, a fifth spring 33 is installed between the sliding plug 32 and the fixing frame 31, a sliding shell 34 is slidably arranged at the lower portion of the sliding plug 32, a sixth spring 35 is installed between the sliding shell 34 and the sliding plug 32, and the elastic coefficient of the sixth spring 35 is greater than that of the fifth spring 33, so that the sliding plug 32 moves to plug the first cylindrical cavity of the fixing ring 6 first, and subsequent adjustment of the first sliding plate 23 is facilitated.
In the above working process, the first sliding plate 23 is located in the first cylindrical cavity of the fixed ring 6 and slides, under the limiting action of the swinging plate 30 and the elastic action of the fourth spring 25, in the initial state, the second sliding plate 24 applies pressure to the hydraulic oil in the liquid storage cavity 12 in the same way, but as the sliding sleeve 5 reciprocates and floats, the second sealing ring 16 and the third sealing ring 18 are gradually worn, so that the hydraulic oil is continuously fed into the first liquid guide hole 17 and the second liquid guide hole 19, that is, at this time, the second sliding plate 24 moves downwards to reduce the elastic potential energy of the fourth spring 25.
However, as the sliding sleeve 5 floats up and down, during the process of moving up the sliding sleeve 5, because the cross sections of the eight through holes 13 on the sliding sleeve 5 are smaller, hydraulic oil on the upper portion of the sliding sleeve 5 is extruded when moving up, the sliding sleeve 5 moves up to contact the extrusion sliding shell 34, but because the elastic coefficient of the sixth spring 35 is larger than that of the fifth spring 33, the sliding sleeve 5 moves up to enable the sliding plug 32 to move up through the sliding shell 34 and the sixth spring 35 and compress the fifth spring 33 to deform, the sliding plug 32 is firstly enabled to contact the first cylindrical cavity of the sealing fixed ring 6, then the sliding sleeve 5 continues to extrude the sliding shell 34 to move up and compress the sixth spring 35 to deform, and at the moment, hydraulic oil on the upper portion of the sliding sleeve 5 is reduced.
In the process of moving up the sliding sleeve 5, pressure is applied to the third sliding frame 26 through hydraulic oil, the elastic potential energy of the fourth spring 25 is reduced, the third sliding frame 26 moves up and presses the bending rod 29 through the upper sliding groove to drive the rotating shaft 28 and the swinging plate 30 to rotate, the swinging plate 30 rotates to press the first sliding plate 23 to move down, the sliding plug 32 seals the first cylindrical cavity of the fixed ring 6, the second sliding plate 24 keeps still, the first sliding plate 23 moves down to further compress the fourth spring 25 to deform, the elastic potential energy of the fourth spring 25 is recovered, the rotating shaft 28 is limited to rotate reversely by the one-way bearing 27, finally, the swinging plate 30 keeps a swinging state, the subsequent sliding sleeve 5 moves down to reset, the sliding plug 32 recovers an initial state, the second sliding plate 24 recovers the pressing force applied to the hydraulic oil in the liquid storage cavity 12 again, and accordingly the fit between the second sealing ring 16 and the third sealing ring 18 and the sliding sleeve 5 is ensured, namely the sealing performance between the sliding sleeve 5 and the fixed sleeve 3 is ensured.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a compensator in pit with two-way compensation function, characterized by, including fixed cover (3), fixed cover (3) are equipped with the ring channel, the ring channel of fixed cover (3) is interior to slide and is equipped with flange ring (4), flange ring (4) are used for installing sleeve pipe (1), be equipped with annular chamber in fixed cover (3), the annular intracavity of fixed cover (3) is slided and is equipped with slip cap (5), slip cap (5) are used for installing tubular column (2), fixed ring (6) are installed in the annular chamber of fixed cover (3), slip cap (5) annular array rigid coupling has a plurality of dead levers (7), dead lever (7) are penetrated fixed ring (6) and rather than sliding connection, a plurality of dead lever (7) rigid coupling have slip ring (8) jointly, slip ring (8) are located the annular intracavity of fixed cover (3), slip ring (8) with annular array rigid coupling has a plurality of first spring (9) between fixed ring (6), annular array (4) are equipped with a plurality of sliding blocks (10) and two-way flange (10) are installed between slip block (4).
2. The underground compensator with the bidirectional compensation function according to claim 1, further comprising a buffer mechanism for buffering impact force between the casing (1) and the tubular column (2), wherein the buffer mechanism is arranged on the fixed sleeve (3), the buffer mechanism comprises an elastic ring (14), the elastic ring (14) is fixedly connected with the fixed ring (6), the fixed sleeve (3) and the sliding sleeve (5) are matched to form a liquid storage cavity (12), the liquid storage cavity (12) is filled with hydraulic oil, the sliding sleeve (5) is provided with through holes (13) distributed in an annular array, hydraulic oil is filled between the sliding block (10) and the flange ring (4), and the fixed sleeve (3) is provided with a sealing assembly for improving tightness between the sliding block and the sliding sleeve (5).
3. A downhole compensator with bi-directional compensation according to claim 2, wherein the sealing assembly comprises a first sealing ring (15), the first sealing ring (15) is mounted on the sliding sleeve (5), the first sealing ring (15) is attached to the fixed sleeve (3), the fixed sleeve (3) is embedded with a second sealing ring (16) and a third sealing ring (18), and the third sealing ring (18) and the second sealing ring (16) are respectively located on two sides of the sliding sleeve (5).
4. A downhole compensator with bi-directional compensation according to claim 3, wherein the cross section of the first sealing ring (15) is right triangle for improving the tightness between the fixed sleeve (3) and the sliding sleeve (5), and the cross section of the second sealing ring (16) and the third sealing ring (18) is approximately trapezoid for improving the tightness between the two and the fixed sleeve (3).
5. A downhole compensator with bi-directional compensation according to claim 3, wherein the fixed sleeve (3) is provided with a plurality of first fluid guiding holes (17) and a plurality of second fluid guiding holes (19) in a ring-shaped array, the first fluid guiding holes (17) are used for guiding hydraulic oil in the fluid storage cavity (12) to contact the second sealing ring (16), and the second fluid guiding holes (19) are used for guiding hydraulic oil in the fluid storage cavity (12) to contact the third sealing ring (18).
6. The underground compensator with the bidirectional compensation function according to claim 2, further comprising a pressurizing mechanism for increasing the pressure in the liquid storage cavity (12), wherein the pressurizing mechanism is arranged on the fixed ring (6), the fixed ring (6) is provided with first chambers which are symmetrically distributed, the pressurizing mechanism comprises first sliding frames (20) which are symmetrically distributed, the first sliding frames (20) which are symmetrically distributed are respectively arranged in the corresponding first chambers on the fixed ring (6) in a sliding mode, the fixed sleeve (3) is provided with second chambers which are symmetrically distributed, a second sliding frame (21) is arranged in the second chambers of the fixed sleeve (3) in a sliding mode, a third spring (22) is arranged between the second sliding frame (21) and the fixed sleeve (3), the second sliding frame (21) penetrates through the fixed ring (6) and is connected with the fixed ring in a sliding mode, the second sliding frame (21) is provided with guide grooves, and the guide grooves of the second sliding frame (21) are matched with the corresponding first sliding frames (20).
7. The downhole compensator with the bidirectional compensation function according to claim 2, further comprising a self-pressure regulating mechanism for maintaining the pressure in the liquid storage cavity (12), wherein the fixed ring (6) is provided with a first cylindrical cavity, the self-pressure regulating mechanism is arranged in the first cylindrical cavity of the fixed ring (6), the self-pressure regulating mechanism comprises a first sliding plate (23), the first sliding plate (23) is arranged in the first cylindrical cavity of the fixed ring (6), a second sliding plate (24) is arranged in the first cylindrical cavity of the fixed ring (6) in a sliding manner, the second sliding plate (24) is positioned on the lower side of the first sliding plate (23), and a fourth spring (25) is arranged between the first sliding plate (23) and the second sliding plate (24).
8. The underground compensator with the bidirectional compensation function according to claim 7, further comprising an adjusting mechanism for adjusting the position of the first sliding plate (23), wherein the first sliding plate (23) is slidably connected with the fixed ring (6), the fixed ring (6) is provided with a second cylindrical cavity, the adjusting mechanism is arranged in the second cylindrical cavity of the fixed ring (6), the adjusting mechanism comprises a third sliding frame (26), the third sliding frame (26) is slidably arranged in the second cylindrical cavity of the fixed ring (6), the fixed ring (6) is rotatably provided with a rotating shaft (28) through a one-way bearing (27), one end of the rotating shaft (28) is fixedly connected with a bending rod (29), the third sliding frame (26) is provided with a sliding groove matched with the bending rod (29), the other end of the rotating shaft (28) is fixedly connected with a swinging plate (30), the swinging plate (30) is matched with the first sliding plate (23), the fixed ring (6) is provided with a sealing component, and the sealing component is used for sealing the first cylindrical cavity.
9. A downhole compensator with bi-directional compensation according to claim 8, wherein the plugging assembly comprises a fixing frame (31), the fixing frame (31) is fixedly connected to the first cylindrical cavity of the fixing ring (6), the fixing frame (31) is slidably provided with a sliding plug (32), a fifth spring (33) is arranged between the sliding plug (32) and the fixing frame (31), the sliding plug (32) is slidably provided with a sliding shell (34), and a sixth spring (35) is arranged between the sliding shell (34) and the sliding plug (32).
10. A downhole compensator with bi-directional compensation according to claim 9, wherein the sixth spring (35) has a higher spring constant than the fifth spring (33) for the sliding plug (32) to engage the first cylindrical cavity of the stationary ring (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311191471.0A CN116950579B (en) | 2023-09-15 | 2023-09-15 | Underground compensator with bidirectional compensation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311191471.0A CN116950579B (en) | 2023-09-15 | 2023-09-15 | Underground compensator with bidirectional compensation function |
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| CN116950579B true CN116950579B (en) | 2023-11-21 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502781A (en) * | 2002-11-22 | 2004-06-09 | 石油大学(北京) | Storage lubricant compensated rubber sealed transmission shaft with cylinder roller thrust bearing |
| CN216617489U (en) * | 2022-02-09 | 2022-05-27 | 胜利油田利丰石油设备制造有限公司 | Deep well stress self-adaptive compensation fracturing process pipe column |
| CN116181854A (en) * | 2022-11-14 | 2023-05-30 | 中国船舶集团有限公司第七〇四研究所 | Integrated integrated cable type gas-liquid compensator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387749B (en) * | 2022-08-25 | 2023-08-15 | 湖南科技大学 | Miniature core test platform that drills into under high pressure environment |
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- 2023-09-15 CN CN202311191471.0A patent/CN116950579B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502781A (en) * | 2002-11-22 | 2004-06-09 | 石油大学(北京) | Storage lubricant compensated rubber sealed transmission shaft with cylinder roller thrust bearing |
| CN216617489U (en) * | 2022-02-09 | 2022-05-27 | 胜利油田利丰石油设备制造有限公司 | Deep well stress self-adaptive compensation fracturing process pipe column |
| CN116181854A (en) * | 2022-11-14 | 2023-05-30 | 中国船舶集团有限公司第七〇四研究所 | Integrated integrated cable type gas-liquid compensator |
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| CN116950579A (en) | 2023-10-27 |
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