CN115217435A - Polished rod sealing device with pressurization function for oil field - Google Patents
Polished rod sealing device with pressurization function for oil field Download PDFInfo
- Publication number
- CN115217435A CN115217435A CN202211143015.4A CN202211143015A CN115217435A CN 115217435 A CN115217435 A CN 115217435A CN 202211143015 A CN202211143015 A CN 202211143015A CN 115217435 A CN115217435 A CN 115217435A
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- sliding
- ring
- packing
- fixing
- polished rod
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- 238000007789 sealing Methods 0.000 title claims abstract description 55
- 238000012856 packing Methods 0.000 claims abstract description 108
- 239000003921 oil Substances 0.000 claims abstract description 33
- 239000010779 crude oil Substances 0.000 claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 15
- 210000004907 gland Anatomy 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 230000002265 prevention Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000033001 locomotion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
- E21B33/062—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a polished rod sealing device with a pressurizing function for an oil field, and relates to the technical field of sealing devices. When the packing receives the unable obvious deformation that takes place of upper and lower extrusion force, the packing can't seal the polished rod, and this in-process packing easily takes place the problem of fold deformation. The utility model provides an oil field is with polished rod sealing device who has pressurization function, is equipped with the gland including the fixed pipe of third, and the lower extreme of gland is equipped with first solid fixed ring, and first solid fixed ring is equipped with the support ring, and the support ring is provided with a plurality of supporting shoe, and the fixed intraductal slip cap that is equipped with of third is equipped with the packing between slip cap and the support ring. According to the packing rod, the packing is tightly held in the circumferential direction by the aid of the supporting blocks which are uniformly arranged in the circumferential direction, the rotating packing is rotated by the aid of the supporting rings, the sealing performance between the packing and the polish rod is improved, the service life of the packing is prolonged, when the polish rod is broken and detached due to fatigue, the crude oil extrudes the ball body to be matched with the third sliding ring, the sealing performance between the ball body and the third sliding ring is enhanced, and crude oil is prevented from overflowing.
Description
Technical Field
The invention relates to the technical field of sealing devices, in particular to a polished rod sealing device with a pressurizing function for an oil field.
Background
In the process of crude oil extraction, underground oil is extracted by driving a polished rod and a sucker rod to reciprocate through an oil pumping unit.
At present, the sealing device of rod-pumped well polished rod is mostly for filling sealed packing disk root structure, sealing between packing and the polished rod is realized through manual rotation gland extrusion packing, need artifical periodic inspection, and current self-regulated formula polished rod is sealed, add the spring between packing and gland, utilize spring pressure to improve the leakproofness between packing and the polished rod, the shortcoming of this mechanism lies in that the packing only receives the extrusion force from top to bottom, sealing between packing and the polished rod relies on the deformation volume realization of packing, along with the frequent up-and-down reciprocating motion of polished rod, the packing is easy to take place serious wearing and tearing, because extrusion dish root deformation volume is limited, if can't make packing and polished rod closely laminate through upper and lower extrusion force, still easily lead to the packing fold deformation, make the leakproofness variation between packing and the polished rod, lead to crude oil leakage, cause wasting of resources and environmental pollution.
Therefore, there is a need to design a polished rod sealing device with pressurization function for oil field, which addresses the shortcomings of the prior art.
Disclosure of Invention
One of the objectives of the present invention is to provide a polished rod sealing device with a pressurization function for an oil field, so as to solve the problems in the prior art that the amount of lateral deformation of a packing is limited, when the packing cannot be significantly deformed by the upward and downward extrusion forces, the packing cannot seal a polished rod, and the packing is prone to wrinkle deformation during the process, which results in poor sealing performance between the packing and the polished rod.
In order to solve the technical problems, the invention adopts the following technical scheme: a polish rod sealing device with a pressurizing function for an oil field comprises a second fixed pipe, wherein the second fixed pipe is arranged at the upper end of a first fixed pipe, the second fixed pipe is fixedly connected with a third fixed pipe, the third fixed pipe is provided with a gland, a polish rod is positioned in the gland, the first fixed pipe, the second fixed pipe and the third fixed pipe, one side of the gland is fixedly connected with a first fixed ring, the lower end of the first fixed ring is provided with a support ring, the lower end of the support ring is circumferentially and uniformly provided with support blocks at intervals, a sliding cavity is arranged in the third fixed pipe, a sliding sleeve is arranged in the third fixed pipe in a sliding manner, the side wall of the sliding sleeve is provided with a convex ring matched with the sliding cavity on the third fixed pipe, and a first spring is arranged between the convex ring of the sliding sleeve and the third fixed pipe, be equipped with the packing between sliding sleeve and the support ring, the packing cover is on the polished rod, the support ring, packing is diversified extruded to supporting shoe and sliding sleeve, the leakproofness between reinforcing packing and the polished rod, be provided with the rotary mechanism that is used for twisting reverse the packing on the first solid fixed ring, rotary mechanism is including the solid fixed ring of second, the solid fixed ring rigid coupling of second is in first solid fixed ring, support ring and the solid fixed ring normal running fit of first, install the torsional spring between support ring and the solid fixed ring of second, the solid fixed ring circumference equidistance of second is provided with the inclined groove, the upper end rigid coupling of supporting shoe has the fixed column, the fixed column is located the solid fixed ring adjacent inclined groove of second, the packing is tightened up in the support ring rotation, make evenly laminate between packing and the polished rod.
More preferably, the packing is set to be frustum-shaped, and the inner side surface of the supporting block is set to be an arc-shaped surface matched with the packing, so that the sealing performance between the packing and the polished rod is improved.
More preferably, the fixed pipe rigid coupling of third has the gas storage shell, the lateral wall of gas storage shell is equipped with the gas injection pipe, and the gas injection pipe of gas storage shell is equipped with the ooff valve, be provided with the air duct of symmetry between gas storage shell and the fixed pipe of third, the one end and the gas storage shell intercommunication of air duct, the other end of air duct is located the fixed pipe of third, and it is provided with the slip post to slide in the air duct, be provided with the spout on the support ring, the support block slides in the spout of adjacent support ring, and the lateral wall of support block slides and is equipped with first slip ring, first slip ring makes the support block draw close together the extrusion packing mutually.
More preferably, the lateral wall of supporting shoe sets up to frustum shape inclined plane, and the inside wall of first sliding ring is for the frustum shape with the lateral wall matched with of supporting shoe, and first sliding ring is used for making the packing bear even circumference extrusion force.
More preferably, the fixed pipe of second is equipped with the closing mechanism who is used for blocking its inside crude oil flow, closing mechanism is including fixed frame, fixed frame sets up on the fixed pipe of second, fixed frame rotates through the backup pad and is provided with the worm, fixed frame rotates and is provided with the pivot, the one end of pivot is provided with the worm wheel, the other end of pivot is provided with the straight-teeth gear, worm wheel and worm meshing, the straight-teeth gear is located fixed frame, it is provided with two racks to slide in the fixed frame, two racks all mesh with the straight-teeth gear, every rack all the rigid coupling has the sliding plate, the contact surface of two sliding plates and polished rod is semicircular groove, and all be equipped with the sealing strip on the contact surface of two sliding plates, the sealing strip is used for increasing the leakproofness between sliding plate and the polished rod, be equipped with the clamping components who is used for increasing the leakproofness between two sliding plates in the fixed intraductal of second.
More preferably, the contact surfaces of the two sliding plates are respectively provided with a triangular projection and a triangular groove, and the triangular projection and the triangular groove are matched to position the two sliding plates to be engaged.
More preferably, clamping component is including the solid fixed ring of third, the solid fixed ring rigid coupling of third is in the fixed pipe of second, it is provided with the sliding frame to slide in the fixed pipe of second, the periphery wall middle part diameter of sliding frame is less than its both ends diameter, the fixed ring of sliding frame and third is fixed, install the second spring between the solid fixed ring of third and the sliding frame, the lower extreme of every sliding plate all is equipped with the fixed block, the lower extreme cooperation of two fixed blocks is frustum shape, the inboard edge of sliding frame upper end cooperates with the frustum shape tip of fixed block, a clamp force for improving between two sliding plates.
More preferably, still including preventing spouting the mechanism, prevent spouting the mechanism and set up in the second fixed tube, prevent spouting the mechanism and be used for preventing that the interior oil of second fixed tube from spouting, prevent spouting the mechanism including the fourth fixed ring, the fourth fixed ring sets up in the second fixed tube, the last symmetry of fourth fixed ring is provided with the blind hole, it is provided with the slip shell to slide respectively in the blind hole of fourth fixed ring, install the third spring between slip shell and the fourth fixed ring, the second slip ring is installed to the slip shell upper end, the rigid coupling has the third slip ring in the second fixed tube, be provided with the spheroid between second slip ring and the third slip ring, spheroid and third slip ring cooperation for self-sealing second fixed tube.
More preferably, the opposite sides of the second sliding ring and the third sliding ring are each provided with a frustum shape for guiding the ball to move toward the middle of the third sliding ring.
Compared with the prior art, the invention achieves the technical effects that:
1. the packing in the invention is in a frustum shape, is matched with the supporting blocks which are uniformly arranged in the circumferential direction, and is pressed by the sliding sleeve under the action of the first spring and the original oil pressure to simultaneously apply circumferential force, so that the sealing property between the packing and the polish rod is improved;
2. the high-pressure gas in the packing device enables the sliding column to extrude the first sliding ring to move, the first sliding ring moves to extrude the plurality of supporting blocks to approach to each other and circumferentially hold the packing tightly, the sealing performance between the packing and the polished rod is further improved, and meanwhile, the packing is repeatedly utilized, and the service life of the packing device is prolonged;
3. in the process that the plurality of supporting blocks are close to each other and tightly hold the packing in the circumferential direction, the supporting ring is enabled to rotate the rotary packing through the rotating mechanism, so that the contact surface between the packing and the polished rod is smooth in the process that the packing is extruded, and the sealing property between the packing and the polished rod is improved;
4. two sliding plates in the closing mechanism synchronously move to clamp the polished rod, so that the second fixed pipe is closed, the packing is convenient to replace subsequently, and meanwhile, under the action of the original oil pressure, the sliding frame moves to extrude the two fixed blocks, so that the sealing property between the two sliding plates and the polished rod is improved;
5. the blowout prevention mechanism utilizes the pressure of crude oil to enhance the sealing property between the ball body and the third sliding ring, and crude oil is prevented from overflowing and being jetted when the polished rod is broken and separated due to fatigue.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a partial cross-sectional view of the present invention.
Fig. 3 is a partially enlarged view of the present invention.
FIG. 4 is an enlarged view of a portion of the support block of the present invention.
Fig. 5 is a schematic perspective view of a second retaining ring according to the present invention.
Figure 6 is an enlarged view of the frame according to the invention.
Fig. 7 is a sectional view of the sliding frame of the present invention.
Fig. 8 is a cross-sectional view of a blowout preventer mechanism according to the present invention.
Reference numbers in the figures: 1-first fixed tube, 101-second fixed tube, 102-third fixed tube, 103-gland, 104-polish rod, 105-first fixed ring, 106-support ring, 107-support block, 108-sliding sleeve, 109-first spring, 110-packing, 2-gas storage shell, 201-gas guide tube, 202-sliding column, 203-first sliding ring, 3-second fixed ring, 301-torsion spring, 302-tilting groove, 303-fixed column, 4-fixed ring, 401-worm, 402-rotating shaft, 403-worm wheel, 404-spur gear, 405-rack, 406-sliding plate, 5-third fixed ring, 501-sliding frame, 502-second spring, 503-fixed block, 6-fourth fixed ring, 601-sliding shell, 602-third spring, 603-second sliding ring, 604-sphere, 605-third sliding ring.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A polish rod sealing device with a pressurizing function for an oil field is disclosed, and shown in figures 1-8, the polish rod sealing device comprises a second fixed pipe 101, the second fixed pipe 101 is bolted on the upper end of a first fixed pipe 1, the upper end of the second fixed pipe 101 is connected with a third fixed pipe 102 in a threaded manner, the upper end of the third fixed pipe 102 is connected with a gland 103 in a threaded manner, a polish rod 104 is positioned in the gland 103, the first fixed pipe 1, the second fixed pipe 101 and the third fixed pipe 102, the lower end of the gland 103 is welded with a first fixed ring 105, the lower end of the first fixed ring 105 is provided with a support ring 106, the lower end of the support ring 106 is provided with six support blocks 107 at uniform intervals in the circumferential direction, a sliding cavity is arranged in the third fixed pipe 102, the inner lower part of the third fixed pipe 102 is connected with a sliding sleeve 108 in a sliding manner, the side wall of the sliding sleeve 108 is provided with a convex ring matched with the sliding cavity on the third fixed pipe 102, a first spring 109 is fixedly connected between a convex ring of the sliding sleeve 108 and the third fixing pipe 102, a packing 110 is installed between the sliding sleeve 108 and the supporting ring 106, the first spring 109 is used for enabling the sliding sleeve 108 to be in close contact with the packing 110, the packing 110 is in a frustum shape, the inner side surfaces of the six supporting blocks 107 are arranged to be arc-shaped surfaces matched with the packing 110, the packing 110 is extruded by the supporting blocks 107, the circumferential extrusion force of the packing 110 is increased, the sealing performance between the packing 110 and the polished rod 104 is improved, the packing 110 is sleeved on the polished rod 104 to achieve multi-directional extrusion of the packing 110, the sealing performance between the packing 110 and the polished rod 104 is enhanced, the service life of the packing 110 is prolonged, a rotating mechanism used for twisting the packing 110 is arranged on the first fixing ring 105, the packing 110 after being extruded is convenient to keep flat and tightly attached to the polished rod 104, and a closing mechanism used for blocking the flow of crude oil inside the second fixing pipe 101 is arranged.
Referring to fig. 1 and 3, a gas storage shell 2 is welded to a third fixed pipe 102, a gas injection pipe for installing a switch valve is arranged on the side wall of the right portion of the gas storage shell 2, the upper end of the gas storage shell 2 is communicated with two gas guide pipes 201, the two gas guide pipes 201 penetrate through the third fixed pipe 102 and are fixedly connected with the third fixed pipe 102, a sliding column 202 is slidably connected to each gas guide pipe 201, high-pressure gas is stored in the gas storage shell 2, the gas extrudes the sliding column 202 to move upwards through the gas guide pipes 201, six sliding grooves are formed in a support ring 106, the six support blocks 107 respectively slide in the six sliding grooves of the support ring 106, first sliding rings 203 are arranged on the outer side walls of the six support blocks 107, the outer side walls of the support blocks 107 are frustum-shaped inclined surfaces, the inner side walls of the first sliding rings 203 are frustum-shaped and are matched with the outer side walls of the support blocks 107, the sliding columns 202 upwardly extrude the first sliding rings 203 to close the support blocks 107, the support blocks 107 to tighten the packing 110 circumferentially, circumferential extrusion force of the packing 110 is increased, and the sealing performance between the polish rod 110 and the packing 104 is improved.
Referring to fig. 3 to 5, the rotating mechanism includes a second fixing ring 3, the second fixing ring 3 is welded in the first fixing ring 105, the support ring 106 is rotatably connected to the first fixing ring 105, a torsion spring 301 is fixedly connected between the support ring 106 and the second fixing ring 3, six inclined grooves 302 are equidistantly arranged in the circumferential direction of the second fixing ring 3, fixed columns 303 are respectively arranged at the upper ends of the six support blocks 107, the six fixed columns 303 are respectively located in the six inclined grooves 302 of the second fixing ring 3, under the action of the torsion spring 301, in an initial state, the six support blocks 107 are expanded outwards to support and fix the first sliding ring 203, and in a process that the first sliding ring 203 moves to press the support blocks 107, under the action of the inclined grooves 302, the six support blocks 107 are drawn together inwards, and at the same time, the support ring 106 and the six support blocks 107 are rotated to tighten the packing 110, so that the packing 110 is uniformly attached to the polish rod 104, and the sealing performance between the packing 110 and the polish rod 104 is further increased.
Referring to fig. 6 and 7, the closing mechanism includes a fixed frame 4, the fixed frame 4 is fixedly connected to the rear portion of the second fixed pipe 101, the fixed frame 4 is rotatably connected to a worm 401 through a support plate, a rotating shaft 402 is rotatably connected to the fixed frame 4, a worm wheel 403 is fixedly connected to the rear portion of the rotating shaft 402, a spur gear 404 is fixedly connected to the front portion of the rotating shaft 402, the worm wheel 403 is meshed with the worm 401, self-locking exists between the two, the rotating shaft 402 is prevented from rotating freely, the spur gear 404 is located in the fixed frame 4, two racks 405 are slidably connected to the fixed frame 4, the two racks 405 are both meshed with the spur gear 404, a sliding plate 406 is fixedly connected to each rack 405, the contact surfaces of the two sliding plates 406 and the polish rod 104 are provided with semicircular grooves, the two sliding plates 406 are driven by the rotation of the spur gear 404 to synchronously move and clamp the polish rod 104 through the two sliding plates 406, so that the pressing forces of the two sliding plates 406 to the polish rod 104 are equal, and the contact surfaces of the two sliding plates 406 are provided with sealing strips, so as to improve the sealing performance between the two sliding plates 406 and the polish rod 104 is further improved, and the sealing performance between the two sliding plates is increased by the two sliding plates 406.
Referring to fig. 2 and 7, the clamping assembly includes a third fixing ring 5, the third fixing ring 5 is fixedly connected to the inner lower portion of the second fixing pipe 101, a sliding frame 501 is slidably connected to the second fixing pipe 101, the diameter of the middle portion of the outer peripheral wall of the sliding frame 501 is smaller than the diameters of the two ends of the outer peripheral wall of the sliding frame 501, the sliding frame 501 slides in a limited manner with the third fixing ring 5, a second spring 502 is fixedly connected between the third fixing ring 5 and the sliding frame 501, the second spring 502 pushes the sliding frame 501 upwards, a fixing block 503 is fixedly connected to the lower end of each sliding plate 406, the lower ends of the two fixing blocks 503 are in a frustum shape after being matched, the inner side edge of the upper end of the sliding frame 501 is matched with the frustum-shaped end of the fixing block 503, and under the action of the second spring 502, the sliding frame 501 presses the two fixing blocks 503 after the two sliding plates 406 are closed, so as to improve the clamping force between the two sliding plates 406 and the two fixing blocks 503.
After the device is installed, a user injects high-pressure gas into the gas storage shell 2, at the moment, the first spring 109 is in a compression state, namely, the sliding sleeve 108 moves upwards to extrude the packing 110, and then the packing 110 is subjected to uniform circumferential extrusion force by combining with the inclined shape at the inner end of the supporting block 107, so that the sealing performance between the packing 110 and the polish rod 104 is improved.
Then the polish rod 104 reciprocates up and down to carry out oil extraction operation, along with the reciprocating movement of the polish rod 104, abrasion occurs between the packing 110 and the polish rod 104, under the action of high-pressure gas in the gas storage shell 2, the high-pressure gas pushes the sliding column 202 to move by pushing the gas guide pipe 201, the sliding column 202 moves to push the first sliding ring 203 to move, as the inner end surface of the first sliding ring 203 is in a frustum shape, the first sliding ring 203 moves to extrude the six supporting blocks 107 to synchronously move together, the six supporting blocks 107 approach to each other to extrude the packing 110 to tightly hold the polish rod 104, the sealing performance between the packing 110 and the polish rod 104 is automatically adjusted, and crude oil overflow is avoided.
Meanwhile, in the process of drawing the six supporting blocks 107 together, the six supporting blocks 107 are acted by the inclined grooves 302, the six supporting blocks 107 and the supporting ring 106 synchronously rotate along with the movement of the supporting blocks 107, the supporting ring 106 rotates to accumulate the force of the torsion spring 301, and the packing 110 is tightened by the rotation of the supporting blocks 107 and the supporting ring 106, so that the packing 110 tightly holds the polished rod 104, and crude oil overflow caused by wrinkling of the packing 110 due to extrusion is avoided.
Meanwhile, in the working process of the polish rod 104, crude oil flows upwards through gaps in the first fixing pipe 1, the second fixing pipe 101 and the third fixing pipe 102 to extrude the sliding sleeve 108, the sliding sleeve 108 moves upwards under the action of the pressure of the crude oil, the extrusion force between the sliding sleeve 108 and the packing 110 is improved, the holding strength of the packing 110 to the polish rod 104 is further improved, and the sealing performance between the packing 110 and the polish rod 104 is improved.
After the sealing between polished rod 104 long-time work and packing 110 worsens, the user rotates gland 103 and screws, make first solid fixed ring 105 and support ring 106 remove downwards and rotate, support ring 106 extrudes packing 110 downwards, and rotate and tighten up packing 110, through the manual regulation to packing 110, improve the leakproofness between packing 110 and polished rod 104 once more, the user compensates the gas pressure in the gas storage shell 2 simultaneously, ensure that sliding column 202 receives the gas pressure effect in gas storage shell 2 and the air duct 201, make sliding column 202 continuously extrude first slip ring 203, improve the circumference of support block 107 to packing 110 and embrace tight power.
When the packing 110 is excessively worn, the packing 110 cannot seal the polish rod 104, a user needs to replace the packing 110 in time, the user rotates the worm 401, the worm 401 rotates to drive the spur gear 404 to rotate through the worm wheel 403 and the rotating shaft 402, the spur gear 404 rotates to drive the two racks 405 to synchronously move, the two racks 405 drive the adjacent sliding plates 406 to synchronously move to approach the polish rod 104, the sliding plates 406 are tightly attached under the positioning action of the triangular convex blocks and the triangular grooves on the sliding plates 406, and the semicircular grooves of the two sliding plates 406 relatively move and extrude the polish rod 104.
The sliding plates 406 move and simultaneously drive the fixing blocks 503 to move, the fixing blocks 503 move to tightly hold the polished rod 104, the contact area between the sliding plates 406 and the polished rod 104 is increased, meanwhile, under the pressure action of crude oil in the second fixing pipe 101, the crude oil extrudes the two fixing blocks 503 to be close to and extruded towards the middle part, the clamping force between the two sliding plates 406 is further improved, namely, the separation sealing of the second fixing pipe 101 is further improved, then a user rotates the pressing cover 103 to take down the pressing cover 103 and parts connected with the pressing cover 103 together, in the taking-out process, the torsional spring 301 releases the torsional force, the support ring 106 and the six support blocks 107 reversely rotate to restore the initial state, meanwhile, the six support blocks 107 outwards expand to support and fix the fixing column 303, then the user namely the packing 110 can be replaced, then the pressing cover 103 is rotated to be installed and reset, and the packing 110 and the polished rod 104 are improved by subsequently repeating the operations.
In the process of replacing the packing 110, the two fixing blocks 503 are limited to the sliding frame 501 in a moving contact manner, under the action of the second spring 502, the sliding frame 501 moves upwards to be in contact fit with the two fixing blocks 503, the sealing performance among the two fixing blocks 503, the two sliding plates 406 and the polished rod 104 is improved, and crude oil pressure fluctuation in the second fixing pipe 101 is avoided, so that crude oil overflow is caused.
Example 2
On the basis of the embodiment 1, as shown in fig. 2 and 8, the oil injection prevention device further comprises an oil injection prevention mechanism, the oil injection prevention mechanism is arranged in the second fixed pipe 101 and is used for preventing oil injection in the second fixed pipe 101, the oil injection prevention mechanism comprises a fourth fixed ring 6, the fourth fixed ring 6 is fixedly connected in the second fixed pipe 101, two blind holes are symmetrically arranged on the fourth fixed ring 6, two blind holes of the fourth fixed ring 6 are respectively and slidably connected with a sliding shell 601, a third spring 602 is fixedly connected between the two sliding shells 601 and the fourth fixed ring 6, the upper ends of the two sliding shells 601 are fixedly connected with a second sliding ring 603, a third sliding ring 605 is welded in the second fixed pipe 101, a ball 604 is arranged between the second sliding ring 603 and the third sliding ring 605 and is acted by the third spring 602, the sliding shells 601 and the second sliding ring 603 move to extrude the ball 604, the opposite sides of the second sliding ring 603 and the third sliding ring 605 are both arranged in a frustum shape, the sliding shells 601 and the second sliding ring 603 extrude the ball 604, the sliding rings, the ball 605 moves to extrude the middle part of the third sliding ring 605, and the sliding ring 605 to further seal the sliding ring 101, and improve the sealing performance of the sliding ring, and seal the sliding ring 101.
When the polish rod 104 is broken due to fatigue, the polish rod 104 releases the restriction on the ball 604, under the action of the third spring 602, the sliding shell 601 drives the second sliding ring 603 to move upwards, the second sliding ring 603 moves to extrude the ball 604 to move towards the middle of the third sliding ring 605, so that the ball 604 blocks the third sliding ring 605, and under the action of crude oil pressure, the crude oil pressure extrudes the ball 604 to enhance the sealing property between the ball 604 and the third sliding ring 605 and prevent crude oil from being sprayed.
Example 3
The user communicates gas storage shell 2 with first fixed pipe 1 through the pipeline, make the crude oil in the first fixed pipe 1 fill gas storage shell 2 and with the contact of slip post 202, both utilize the pressure extrusion slip post 202 of crude oil in the first fixed pipe 1 to remove, slip post 202 removes and carries out above-mentioned operation, six supporting shoe 107 synchronous motion that make circumference set up draw close together mutually, the completion is held tightly to the circumference of packing 110, increase the leakproofness between packing 110 and polished rod 104.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (9)
1. The utility model provides an oil field is with polished rod sealing device who has pressurization function, including the fixed pipe of second (101), the upper end at first fixed pipe (1) is installed in the fixed pipe of second (101), the fixed pipe of second (101) rigid coupling has the fixed pipe of third (102), gland (103) are installed in the fixed pipe of third (102), polished rod (104) are located gland (103), first fixed pipe (1), the fixed pipe of second (101) and the fixed pipe of third (102), its characterized in that: a first fixing ring (105) is fixedly connected to one side of a gland (103), a support ring (106) is arranged on the lower side of the first fixing ring (105), support blocks (107) are uniformly arranged on the lower side of the support ring (106) at intervals in the circumferential direction, a sliding cavity is arranged in a third fixing tube (102), a sliding sleeve (108) is arranged in the third fixing tube (102) in a sliding manner, a convex ring matched with the sliding cavity on the third fixing tube (102) is arranged on the side wall of the sliding sleeve (108), a first spring (109) is arranged between the convex ring of the sliding sleeve (108) and the third fixing tube (102), a packing (110) is arranged between the sliding sleeve (108) and the support ring (106), the packing (110) is sleeved on a polished rod (104), the support ring (106), the support block (107) and the sliding sleeve (108) are pressed in a multidirectional mode, the sealing performance between the packing (110) and the polished rod (104) is enhanced, a rotating mechanism for twisting the packing (110) is arranged on the first fixing ring (105), the rotating mechanism comprises a second fixing ring (3), the second fixing ring (3) is fixedly connected in the first fixing ring (105), a second fixing ring (106) is arranged between the support ring (106) and a second fixing ring (301) in an equidistant manner, the upper end rigid coupling of supporting shoe (107) has fixed column (303), and fixed column (303) are located the adjacent inclined groove (302) of second solid fixed ring (3), and support ring (106) rotate and tighten up packing (110), make evenly laminating between packing (110) and polished rod (104).
2. The polished rod sealing device with pressurization function for oil field according to claim 1, characterized in that: packing (110) sets up to the frustum shape, and the medial surface of supporting shoe (107) sets up to the arcwall face with packing (110) complex for improve the leakproofness between packing (110) and polished rod (104).
3. The polished rod sealing device with pressurization function for oil field according to claim 2, characterized in that: the third fixing pipe (102) is fixedly connected with an air storage shell (2), the side wall of the air storage shell (2) is provided with an air injection pipe, the air injection pipe of the air storage shell (2) is provided with a switch valve, symmetrical air guide pipes (201) are arranged between the air storage shell (2) and the third fixing pipe (102), one end of each air guide pipe (201) is communicated with the air storage shell (2), the other end of each air guide pipe (201) is located in the third fixing pipe (102), a sliding column (202) is arranged in the air guide pipes (201) in a sliding mode, sliding grooves are formed in the support rings (106), the support blocks (107) slide in the sliding grooves of the adjacent support rings (106), the outer side walls of the support blocks (107) are provided with first sliding rings (203) in a sliding mode, and the first sliding rings (203) enable the support blocks (107) to be close to each other to extrude packing (110).
4. The polished rod sealing device with pressurization function for oil field according to claim 3, characterized in that: the lateral wall of supporting shoe (107) sets up to frustum shape inclined plane, and the inside wall of first sliding ring (203) is for the frustum shape with the lateral wall matched with of supporting shoe (107), and first sliding ring (203) are used for making packing (110) bear even circumferential extrusion force.
5. The polished rod sealing device with pressurization function for oil field according to claim 4, characterized in that: the second fixing pipe (101) is provided with a closing mechanism for blocking the flow of crude oil inside the second fixing pipe, the closing mechanism comprises a fixing frame (4), the fixing frame (4) is arranged on the second fixing pipe (101), the fixing frame (4) is provided with a worm (401) in a rotating mode through a supporting plate, the fixing frame (4) is provided with a rotating shaft (402) in a rotating mode, one end of the rotating shaft (402) is provided with a worm gear (403), the other end of the rotating shaft (402) is provided with a straight gear (404), the worm gear (403) is meshed with the worm (401), the straight gear (404) is located in the fixing frame (4), two racks (405) are arranged in the fixing frame (4) in a sliding mode, the two racks (405) are both meshed with the straight gear (404), each rack (405) is fixedly connected with a sliding plate (406), the contact surfaces of the two sliding plates (406) and the polished rod (104) are semicircular grooves, sealing strips are arranged on the contact surfaces of the two sliding plates (406), the sealing strips are used for increasing the sealing performance between the sliding plates (406) and the sliding plates (104) and clamping assemblies are arranged in the second fixing pipe (101).
6. The polished rod sealing device with pressurization function for oil field according to claim 5, characterized in that: the contact surfaces of the two sliding plates (406) are respectively provided with a triangular convex block and a triangular groove which are matched with each other to position the meshing of the two sliding plates (406).
7. The polished rod sealing device with pressurization function for oil field according to claim 6, characterized in that: the clamping assembly comprises a third fixing ring (5), the third fixing ring (5) is fixedly connected in a second fixing pipe (101), a sliding frame (501) is arranged in the second fixing pipe (101) in a sliding mode, the diameter of the middle of the outer peripheral wall of the sliding frame (501) is smaller than the diameters of two ends of the outer peripheral wall of the sliding frame (501), the sliding frame (501) slides in a limiting mode with the third fixing ring (5), a second spring (502) is installed between the third fixing ring (5) and the sliding frame (501), a fixing block (503) is arranged at the lower end of each sliding plate (406), the two fixing blocks (503) are matched in a frustum shape, the inner side edge of the upper end of the sliding frame (501) is matched with the end portion of the frustum shape of the fixing block (503), and the clamping force between the two sliding plates (406) is improved.
8. The polished rod sealing device with pressurization function for oil field according to claim 1, characterized in that: the oil injection prevention device is characterized by further comprising an oil injection prevention mechanism, the oil injection prevention mechanism is arranged in the second fixed pipe (101), the oil injection prevention mechanism is used for preventing oil injection in the second fixed pipe (101), the oil injection prevention mechanism comprises a fourth fixed ring (6), the fourth fixed ring (6) is arranged in the second fixed pipe (101), blind holes are symmetrically formed in the fourth fixed ring (6), sliding shells (601) are respectively arranged in the blind holes of the fourth fixed ring (6) in a sliding mode, third springs (602) are installed between the sliding shells (601) and the fourth fixed ring (6), second sliding rings (603) are installed at the upper ends of the sliding shells (601), third sliding rings (605) are fixedly connected in the second fixed pipe (101), spheres (604) are arranged between the second sliding rings (603) and the third sliding rings (605), and are matched with the third sliding rings (605), and are used for automatically closing the second fixed pipe (101).
9. The polish rod sealing device for an oilfield tool having a pressurizing function of claim 8, wherein: (603) And (605) is arranged in a frustum shape and used for moving the sphere (604) to the middle part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211143015.4A CN115217435B (en) | 2022-09-20 | 2022-09-20 | Polished rod sealing device with pressurization function for oil field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211143015.4A CN115217435B (en) | 2022-09-20 | 2022-09-20 | Polished rod sealing device with pressurization function for oil field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117905410A (en) * | 2024-03-20 | 2024-04-19 | 大庆强弘科技有限公司 | Blowout-preventing sealing protection device for petroleum wellhead |
| CN117927175A (en) * | 2024-03-21 | 2024-04-26 | 东营华辰石油装备有限公司 | Polished rod sealer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117905410B (en) * | 2024-03-20 | 2024-05-28 | 大庆强弘科技有限公司 | Blowout-preventing sealing protection device for petroleum wellhead |
| CN117927175A (en) * | 2024-03-21 | 2024-04-26 | 东营华辰石油装备有限公司 | Polished rod sealer |
| CN117927175B (en) * | 2024-03-21 | 2024-06-04 | 东营华辰石油装备有限公司 | Polished rod sealer |
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| CN115217435B (en) | 2022-11-25 |
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Inventor after: Wang Limin Inventor after: Zhu Cuixiang Inventor after: Zhuang Hao Inventor after: Han Lei Inventor after: Zhang Kai Inventor after: Wang Haiyan Inventor after: Yang Mei Inventor after: Gao Jingwei Inventor after: Wang Ying Inventor after: Li Xiangxiang Inventor after: Li Wenwen Inventor before: Wang Limin Inventor before: Li Wenwen Inventor before: Zhu Cuixiang Inventor before: Zhuang Hao Inventor before: Dang Ruofei Inventor before: Han Lei Inventor before: Zhang Kai Inventor before: Wang Haiyan Inventor before: Yang Mei Inventor before: Gao Jingwei Inventor before: Wang Ying Inventor before: Li Xiangxiang |
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Denomination of invention: A light rod sealing device with pressurization function for oil fields Granted publication date: 20221125 Pledgee: Shandong Kenli Rural Commercial Bank Co.,Ltd. Pledgor: SHENGLI OILFIELD DONGQIANG MECHANICAL AND ELECTRICAL EQUIPMENT MANUFACTURING CO.,LTD. Registration number: Y2024980022206 |