CN115263226B - Polished rod sealing device with eccentric wear prevention function for oil field - Google Patents
Polished rod sealing device with eccentric wear prevention function for oil field Download PDFInfo
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- CN115263226B CN115263226B CN202211169447.2A CN202211169447A CN115263226B CN 115263226 B CN115263226 B CN 115263226B CN 202211169447 A CN202211169447 A CN 202211169447A CN 115263226 B CN115263226 B CN 115263226B
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- packing
- polished rod
- connecting shell
- movable sleeve
- shell
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention provides a polished rod sealing device with an eccentric wear prevention function for an oil field, and relates to the technical field of polished rod sealing. The axial lead of the polish rod deviates from the axial lead of the oil pumping port, so that the friction force of the polish rod to one side of the packing is increased, the packing is eccentrically worn, and the effect of the packing on the seal of the polish rod is reduced. The utility model provides an oil field is with polished rod sealing device who has anti-eccentric function, and the detachable first connecting shell that is connected with in movable sleeve's upper end, first connecting shell rigid coupling have the second connecting shell, and the second connecting shell rigid coupling has fixed cover, and fixed cover rotates and is connected with the packing box, and the interior symmetrical formula of packing box is provided with first packing. Reciprocating motion is once from top to bottom for the polished rod, and packing box and two first disk root circumferential direction 30 wherein utilize packing box to drive two first disk root circumferential direction, make the polished rod the same to the frictional degree of two first disk root inner ring faces, avoid polished rod skew and then the part of two first disk roots of eccentric wear, two first disk roots reduce the leakproofness of polished rod.
Description
Technical Field
The invention relates to the technical field of polish rod sealing, in particular to a polish rod sealing device with an eccentric wear prevention function for an oil field.
Background
The polish rod sealing device seals an oil extraction well head and a polish rod through packing and polish rod sliding fit, prevents a sealing device that crude oil overflows from an oil pumping port in the pit, but at long-time oil pumping in-process, polish rod reciprocating motion can lead to packing wearing and tearing, reduces the leakproofness of packing to the polish rod, and current polish rod sealing device is many-pass to press the lid to extrude packing to make it take place deformation, improves the leakproofness of packing to the polish rod soon.
In the use of the existing polish rod sealer, the polish rod is not comfortable in mounting position or is subjected to external force to cause polish rod deflection, the axial lead of the polish rod deflects with the axial lead of the oil pumping port, the extrusion force of the polish rod to one side of the packing is increased, the friction force of the polish rod to one side of the packing is increased, and the packing is unevenly stressed and is eccentrically worn for a long time, so that a gap is reserved between the packing and the polish rod, and the effect of the packing on polish rod sealing is reduced.
Disclosure of Invention
In order to overcome the problems, the polish rod sealing device with the eccentric wear prevention function for the oil field is provided.
In order to realize the purpose, the invention provides the following technical scheme: a polish rod sealing device with an eccentric wear prevention function for an oil field comprises a flange mounting seat, wherein a fixed shell is mounted on the flange mounting seat, a circular through hole is formed in the fixed shell, a movable sleeve is connected in the fixed shell in a sliding mode, an extrusion cover plate used for sealing is fixedly connected to the fixed shell, a limiting round hole is formed in the extrusion cover plate, the extrusion cover plate is in sliding fit with the shoulder of the movable sleeve, the upper end of the movable sleeve is detachably connected with a first connecting shell, a circular boss is arranged on the lower side of the first connecting shell, a second connecting shell is fixedly connected to the first connecting shell, a fixing sleeve is in threaded connection with the second connecting shell, a packing box is rotatably connected to the fixing sleeve, a toothed ring is fixedly connected to the lower side of the packing box, a connecting and supporting sleeve used for supporting and stabilizing the packing box is arranged between the packing box and the second connecting shell, a first packing used for sealing a polish rod is symmetrically arranged in the packing box, an extrusion sealing assembly used for continuously extruding the first packing is arranged at the top end of the fixing sleeve, the extrusion sealing assembly is matched with the first packing, the first packing is always attached to the polish rod, an eccentric wear prevention drive assembly is arranged on the second connecting shell, and the polish rod is prevented from being circumferentially and matched with the first packing;
the eccentric wear prevention driving assembly comprises an annular plate, the annular plate is detachably installed on the second connecting shell, the annular plate and the second connecting shell are provided with handles, the annular plate is rotatably connected with a supporting frame, the supporting frame is symmetrical and is connected with a friction wheel through a rotating shaft, the friction wheel is in extrusion fit with a polished rod, the supporting frame is symmetrical and fixedly connected with a small reduction gear box, the power input end of the small reduction gear box and the adjacent friction wheel rotating shaft are in chain wheel and chain transmission, the chain wheel on the rotating shaft of the friction wheel is a one-way chain wheel, a spline sleeve is installed at the power output end of the small reduction gear box, the second connecting shell is symmetrical and is connected with a rotating rod, the upper end of the rotating rod is matched with the adjacent spline sleeve, the lower end of the rotating rod is fixedly connected with a transmission gear meshed with a tooth ring, the rotating rod drives the transmission gear and the tooth ring to be transmitted, and the packing box is in discontinuous circumferential rotation.
Further, the diameter of the circular table at the lower part of the movable sleeve is larger than that of the circular through hole of the fixed shell, the diameter of the circular table at the lower part of the movable sleeve is smaller than that of the fixed shell, a gap is formed between the movable sleeve and the fixed shell, the movable sleeve penetrates through the limit circular hole of the extrusion cover plate, and the diameter of the shoulder part of the movable sleeve is smaller than that of the limit circular hole of the extrusion cover plate.
Further, the first packing of symmetry complex sets up to frustum shape, and first packing is provided with spacing spout, and the medial surface of packing box sets up frustum shape, and the medial surface symmetry of packing box is provided with the deflector, and the spacing spout of first packing cooperates with the deflector in the packing box for prevent that first packing from skidding with the packing box.
Further, the extrusion seal subassembly is including pressing the cap, presses the cap dismantlement formula to install in the top of fixed cover, presses the cap to be provided with circular boss, and circular boss circumference equidistant is provided with circular blind hole, and sliding connection has the slide bar in the circular blind hole of pressure cap, and the slide bar with press to be provided with the first spring that is used for continuously extrudeing first packing between the cap, the lower extreme sliding connection of slide bar has the swivel becket, the swivel becket with the crowded press fit of first packing.
Further, the first connecting shell is internally symmetrically provided with sealing blocks for clamping the sealed polished rod, the lower part of the sealing block in symmetrical fit is set to be in a circular truncated cone shape, the upper part of the sealing block is set to be in a frustum shape, the lower part of the sealing block in symmetrical fit is in sealing fit with the first connecting shell, one of the sealing blocks is symmetrically provided with a circular blind hole, a second spring is arranged in the circular blind hole, the second spring is fixedly connected with the sealing block on the opposite side, and the sealing block and the second connecting shell are in extrusion press fit and are used for sealing the polished rod.
Furthermore, the through hole at the lower part of the second connecting shell is provided with a frustum-shaped inclined surface for extruding the sealing block.
Further, still including the eccentric wear buffer gear who is used for preventing the polished rod vibrations, eccentric wear buffer gear sets up in the fixed casing, eccentric wear buffer gear is including the first gasbag that is used for the buffering, first gasbag sets up in the clearance between fixed casing and the movable sleeve, fixed casing intercommunication has the intake pipe, intake pipe and first gasbag intercommunication, be provided with the valve in the intake pipe, be provided with the second gasbag that is used for continuously providing the extrusion force in the movable sleeve, the movable sleeve is provided with the air vent along axis direction circumference equidistant, first gasbag and second gasbag all communicate with the air vent of movable sleeve, be provided with the second packing on the polished rod in the second gasbag, the boss extrusion fit of second packing and first connecting shell, first connecting shell is used for extrudeing the second packing downwards and seals the polished rod, the detachable first solid fixed ring that installs of extrusion apron, the detachable second solid fixed ring of installing of movable sleeve, the circumference equidistant reset spring that is provided with between second solid fixed ring and the first fixed ring.
The movable sleeve is characterized by further comprising a supporting shell, the supporting shell is fixedly connected to the inner side face of the flange mounting seat, the inner side face of the supporting shell is in a frustum shape, a sealing ball body used for sealing a circular hole in the lower portion of the movable sleeve to penetrate through is arranged in the supporting shell in a rolling mode, the sealing ball body is in rolling contact with the movable sleeve and the polished rod, a magnetic block magnetically connected with the sealing ball body is arranged on the lower portion of the movable sleeve, and an inclined face matched with the sealing ball body is arranged on the circular hole in the lower portion of the movable sleeve.
Furthermore, the packing box also comprises a dustproof ring used for preventing dust from entering the packing box, the dustproof ring is installed at the top of the pressure cap and is made of elastic anti-friction materials, and the dustproof ring is in sliding fit with the polish rod.
Compared with the prior art, the invention has the beneficial effects that:
1. utilize the rotating ring to continue the extrusion downwards, the crowded press fit of the inboard of two first packings and packing box, the frustum shape medial surface of packing box makes two first packings receive the extrusion and draws close to center department, and two first packings closely laminate on the polished rod, prolong the life of first packings.
2. Reciprocating motion is once from top to bottom for the polished rod, and packing box and two first disk root circumferential direction 30 wherein, two first disk roots drive the swivel becket and rotate along the slide bar, utilize packing box to drive two first disk root circumferential direction, make the polished rod the same to the frictional degree of two first disk root internal ring surfaces, avoid at the reciprocal in-process of pumping of polished rod, polished rod skew and then two first disk root parts of eccentric wear, lead to the leakproofness of two first disk roots to the polished rod to reduce.
3. Two sealed pieces seal the polished rod, avoid bottom hole pressure increase to cause the blowout when changing first packing, and high-pressure spun oil gas can cause the injury to the staff.
4. Utilize the gas pressure in the first gasbag to cushion the movable sleeve, reset spring all takes place deformation simultaneously, avoid movable sleeve and fixed casing striking to collide with, the second packing is along with the polished rod skew simultaneously, make the second packing around establishing on the polished rod and even atress all the time, gas pressure and reset spring elastic action in the first gasbag are down, make the polished rod reset, make the axial lead of polished rod and the axial lead coincidence of fixed casing, avoid the polished rod skew to the extrusion force increase of second packing one side, accelerate the wearing and tearing speed of second packing, the second packing lasts the extrusion that receives the second gasbag, make the inseparable laminating of second packing on the polished rod, improve the sealed effect of second packing to the polished rod.
5. The sealing ball body is moved to the lower part of the through hole of the movable sleeve by magnetic attraction, and the sealing ball body blocks the movable sleeve, so that the phenomenon that the underground pressure is increased to cause blowout of crude oil from the underground to cause resource waste is avoided.
6. The dust ring is in sealing fit with the polish rod, so that dust and impurities are prevented from entering the packing box, and the service life of the first packing is prolonged.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic sectional perspective view of the present invention.
Fig. 3 is a schematic perspective view of an anti-eccentric driving assembly according to the present invention.
Fig. 4 is a schematic cross-sectional perspective view of the extrusion sealing assembly of the present invention.
Fig. 5 is a schematic sectional perspective view of a second connecting shell according to the present invention.
Fig. 6 is a schematic cross-sectional perspective structure of the sealing block of the present invention.
Fig. 7 is a schematic sectional perspective view of the eccentric wear buffering mechanism of the present invention.
Fig. 8 is a partially sectional perspective view of the eccentric wear buffering mechanism of the present invention.
Fig. 9 is a schematic sectional three-dimensional structure of the support shell of the present invention.
In the reference symbols: 101-flange mounting seat, 102-fixed shell, 103-movable sleeve, 1031-pressing cover plate, 104-first connecting shell, 105-second connecting shell, 106-fixed sleeve, 107-packing box, 108-toothed ring, 109-connecting support sleeve, 110-first packing, 111-pressing cap, 112-sliding rod, 113-first spring, 114-rotating ring, 201-annular plate, 202-supporting frame, 203-friction wheel, 204-small reduction gearbox, 205-spline sleeve, 206-rotating rod, 207-transmission gear, 301-sealing block, 302-second spring, 401-first air bag, 402-air inlet pipe, 403-second air bag, 404-second packing, 405-first fixed ring, 406-second fixed ring, 407-reset spring, 501-supporting shell, 502-sealing ball and 6-dust-proof ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The terms "first" and "second" in the description of the present invention are merely used for convenience in describing the present invention based on the embodiments of the present invention, and are not to be construed as indicating or implying relative importance. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.
Example 1
A polish rod sealing device with an eccentric wear prevention function for an oil field is disclosed, and comprises a flange mounting seat 101, a fixed shell 102 is welded on the flange mounting seat 101, the fixed shell 102 is provided with a circular through hole, a movable sleeve 103 is slidably connected in the fixed shell 102, the fixed shell 102 is in bolted connection with a pressing cover plate 1031 for sealing, the pressing cover plate 1031 is provided with a limit circular hole, the pressing cover plate 1031 is in sliding fit with a shoulder of the movable sleeve 103, the diameter of a circular platform at the lower part of the movable sleeve 103 is larger than that of the circular through hole of the fixed shell 102, the diameter of the circular platform at the lower part of the movable sleeve 103 is smaller than that of the fixed shell 102, a gap is arranged between the movable sleeve 103 and the fixed shell 102, the movable sleeve 103 passes through the limit circular hole of the pressing cover plate 1031 and is in circumferential limit fit, the diameter of the shoulder of the movable sleeve 103 is smaller than that of the limiting circular hole of the pressing cover plate 1031, the movable sleeve 103 moves between the fixed shell 102 and the extrusion cover plate 1031, the movable sleeve 103 is always in sealing fit with the fixed shell 102 and the extrusion cover plate 1031, the upper end of the movable sleeve 103 is connected with a first connecting shell 104 through bolts, a circular boss is arranged on the lower side of the first connecting shell 104, the first connecting shell 104 is in threaded connection with a second connecting shell 105, a fixing sleeve 106 is welded on the second connecting shell 105, the fixing sleeve 106 is rotatably connected with a packing box 107, a toothed ring 108 is welded on the lower side of the packing box 107, a connecting and supporting sleeve 109 for supporting and stabilizing the packing box 107 is arranged between the packing box 107 and the second connecting shell 105, the supporting sleeve 109 supports the packing box 107 to prevent the packing box 107 from shaking in the rotating process, the supporting sleeve 109 is rotatably connected with the packing box 107, two first packing 110 for sealing a polished rod are arranged in the packing box 107, the two first packing 110 which are symmetrically matched are in a frustum shape, first packing 110 is provided with spacing spout, the medial surface of packing box 107 sets up to the frustum shape, two first packing 110 receive the extrusion, under the frustum shape cavity effect in packing box 107, make two first packing shape diversion centre draw close, the medial surface symmetric welding of packing box 107 has the deflector, the spacing spout of first packing 110 and the deflector sliding limit fit in the packing box 107, deflector in the packing box 107 avoids first packing 110 to take place to skid, the upper end of fixed cover 106 is provided with the extrusion seal subassembly that is used for continuously extruding first packing 110, extrusion seal subassembly and the cooperation of first packing 110, make first packing 110 laminate with the polished rod all the time, second connecting shell 105 is provided with anti-eccentric wear drive assembly, polished rod reciprocating motion and anti-eccentric wear drive assembly cooperation, make packing box 107 and its inside first packing 110 along with circumferential direction, prevent that first packing 110 from receiving the polished rod eccentric wear, lead to the appearance clearance between first packing 110 and the polished rod.
According to fig. 4, the extrusion seal assembly comprises a pressing cap 111, the pressing cap 111 is in threaded connection with the upper end of the fixing sleeve 106, the pressing cap 111 is provided with a circular boss, circular blind holes are formed in the circumferential direction of the circular boss at equal intervals, a sliding rod 112 is connected in the circular blind hole of the pressing cap 111 in a sliding mode, a first spring 113 used for continuously extruding the first packing 110 is connected between the sliding rod 112 and the pressing cap 111, the first spring 113 is used for downwards extruding, the two first packing 110 and the packing box 107 are in inner side extrusion fit, two first packing 110 are close to the center after being extruded by the frustum-shaped inner side face of the packing box 107, the two first packing 110 are tightly attached to the polish rod, the service life of the first packing 110 is prolonged, the lower end of the sliding rod 112 is connected with a rotating ring 114, and the rotating ring 114 is in extrusion fit with the first packing 110.
According to fig. 3, the anti-eccentric driving assembly includes an annular plate 201, the annular plate 201 is connected to the second connecting shell 105 through a thread, both the annular plate 201 and the second connecting shell 105 are connected to a handle through a thread, the annular plate 201 is connected to a support frame 202 in a rotating manner, the support frame 202 is symmetrically connected to a friction wheel 203 through a rotating shaft, a rubber sheet made of rubber anti-friction material is installed on the outer side surface of the friction wheel 203 to prevent the friction wheel 203 from slipping with a polish rod, the friction wheel 203 is in extrusion fit with the polish rod, the support frame 202 is symmetrically bolted connection with a small reduction gearbox 204, a power input end of the small reduction gearbox 204 is in sprocket and chain transmission with an adjacent friction wheel 203, a sprocket on the rotating shaft of the friction wheel 203 is a one-way sprocket (the one-way sprocket is an existing part and not described herein too much), a spline housing 205 is welded on a power output end of the small reduction gearbox 204, a 206 is connected to the second connecting shell 105 in a rotating manner, an upper end of the rotating shaft 206 is matched with the spline housing 205 on the adjacent rotating shaft, a power output end of the small reduction gearbox 204 drives the adjacent shaft 206 to rotate an intermittent transmission gear through the spline housing 206, a transmission gear 207 is connected to the transmission gear 108, and a transmission gear 107.
According to fig. 5 and 6, sealing blocks 301 for clamping and sealing the polish rod are symmetrically arranged in the first connecting shell 104, the lower parts of the two sealing blocks 301 which are symmetrically matched are arranged to be in a circular truncated cone shape, the upper parts of the two sealing blocks 301 are arranged to be in a frustum shape, the two sealing blocks 301 are extruded by the second connecting shell 105, the two sealing blocks 301 are drawn together towards the middle and attached to the polish rod, the sealing blocks 301 are matched with the first connecting shell 104 to seal the polish rod, the circular truncated cones at the lower parts of the two sealing blocks 301 which are symmetrically matched are in a sealing matching with the first connecting shell 104, one of the sealing blocks 301 is symmetrically provided with a circular blind hole, a second spring 302 is arranged in the circular blind hole, the two sealing blocks 301 are separated by the elasticity of the second spring 302, the two sealing blocks 301 are prevented from being adhered and separated difficultly, the second spring 302 is fixedly connected with the sealing block 301 at the opposite side, the sealing blocks 301 are in an extrusion matching with the second connecting shell 105, and the through hole at the lower part of the second connecting shell 105 is arranged to be in a sealing frustum-shaped inclined plane which is used for enabling the polish rod 301 to be moved close to be matched with the sealing frustum-shaped inclined plane of the second connecting shell 105.
The flange mounting base 101 is connected to a pumping port of a Christmas tree by a worker, the polish rod sequentially passes through the pressing cap 111, the second connecting shell 105, the first connecting shell 104, the movable sleeve 103 and the flange mounting base 101, in the process of moving up and down of the polish rod, the two first packing 110 are sealed against the polish rod, the two first packing 110 are continuously pressed downwards by the sliding rod 112 and the rotating ring 114 under the elastic force of the first spring 113, after the two first packing 110 are used for a period of time, the rotating ring 114 is continuously pressed downwards, the two first packing 110 and the packing box 107 are in extrusion fit inside, the two first packing 110 are close to the center after being pressed by the frustum-shaped inner side surface of the packing box 107, the two first packing 110 are tightly attached to the polish rod, the inspection time interval of the worker is prolonged, the worker rotates the pressing cap 111 again by using a wrench when inspecting, the worker simultaneously holds the grip of the second connecting shell 105 to prevent the polish rod from rotating along with the polish rod, the pressing cap 111 moves downwards, the first spring 113 is further compressed, and the two first packing 110 are continuously sealed and inspected.
When the polish rod moves downwards, the polish rod drives the two friction wheels 203 to rotate, the friction wheels 203 transmit power to the power input end of the adjacent small reduction gear box 204 through chain and sprocket transmission, the small reduction gear box 204 transmits the power of the input end to the power output end after reducing the speed, the power output end of the small reduction gear box 204 drives the adjacent rotating rod 206 and the transmission gear 207 to rotate through the spline sleeve 205 on the power output end, the two transmission gear 207 drives the toothed ring 108 and the packing box 107 to rotate circumferentially along the fixed sleeve 106 and the connecting support sleeve 109, the packing box 107 drives the two first packing 110 therein to rotate through the guide plate, the polish rod reciprocates up and down once, the packing box 107 and the two first packing 110 therein rotate circumferentially 30 degrees, the two first packing 110 drive the rotating ring 114 to slide along the sliding rod 112, the packing box 107 drives the two first packing 110 to rotate circumferentially, so that the friction degree of the polish rod to the inner annular surfaces of the two first packing 110 is the same, and in the process of reciprocating oil pumping of the polish rod, the polish rod deviates and then grinds the local parts of the two first packing 110, which results in that the sealing performance of the two first packing 110 is reduced, and when the polish rod moves upwards, the two friction wheels 203 cannot drive the sprocket wheel to rotate.
When a worker replaces the first packing 110, the worker stops the work of the oil pumping unit, firstly, the worker limits the first connecting shell 104 by using a wrench, secondly, the worker rotates the handle of the second connecting shell 105 anticlockwise to enable the second connecting shell 105 to move downwards along the first connecting shell 104 through threads, the frustum-shaped inclined plane at the lower end of the second connecting shell 105 downwards extrudes the two sealing blocks 301, the inclined plane on the upper portion of the sealing block 301 is extruded and then drawn close to the middle and extruded on the polished rod, the two second springs 302 are compressed, the two sealing blocks 301 seal the polished rod, blowout caused by the increase of bottom pressure when the first packing 110 is replaced is avoided, after the first packing 110 is replaced, the worker rotates the handle of the second connecting shell 105 clockwise to reset the second connecting shell 105, and the two sealing blocks 301 reset under the elastic force of the second spring 302.
One worker firstly holds the handle of the annular plate 201 to rotate clockwise, meanwhile, the other worker holds the handle of the second connecting shell 105 to limit the handle, follow-up rotation between the second connecting shell 105 and the first connecting shell 104 is avoided, the annular plate 201 moves upwards through thread rotation and is separated from the second connecting shell 105, the worker upwards lifts the annular plate 201, the annular plate 201 drives the supporting frame 202 and parts on the supporting frame to move upwards along a polished rod, the output ends of the two small reduction gear boxes 204 are respectively out of fit with the adjacent rotating rods 206, the worker uses a wrench to rotate the pressing cap 111 clockwise, the pressing cap 111 and the parts on the pressing cap 111 move upwards to be far away from the fixed sleeve 106, the first spring 113 drives the sliding rod 112 and the rotating ring 114 to reset, the worker takes out the worn first packing 110 from the packing box 107, cleans impurities in the packing box 107, places the new first packing 110 into the limiting groove in the packing box 107, the worker resets the pressing cap 111 and the annular plate 201, the spline sleeve 205 at the power output end of the small reduction gear boxes 204 is matched with the adjacent spline sleeve 206 again, and then the pumping unit continues to work.
Example 2
Based on embodiment 1, as shown in fig. 7 and 8, the optical polish rod further includes an eccentric wear buffering mechanism for preventing vibration of the polish rod, the eccentric wear buffering mechanism is disposed in the fixed housing 102, the eccentric wear buffering mechanism includes a first air bag 401 for buffering, the first air bag 401 is filled in a gap between the fixed housing 102 and the movable sleeve 103, the first air bag 401 is pressed by the movable sleeve 103, the movable sleeve 103 is buffered by using air pressure in the first air bag 401, the fixed housing 102 is communicated with an air inlet pipe 402, the air inlet pipe 402 is communicated with the first air bag 401, a valve is disposed in the air inlet pipe 402, a second air bag 403 for continuously providing pressing force is filled in the movable sleeve 103, vent holes are circumferentially disposed in the movable sleeve 103 at equal intervals along the axial direction, the first air bag 401 and the second air bag 403 are both communicated with the vent holes of the movable sleeve 103, the second packing 404 wound on the polished rod is arranged in the second air bag 403, after the second packing 404 is worn, the second packing 404 is continuously extruded by air pressure in the second air bag 403, so that the second packing 404 is always attached to the polished rod, the service life of the second packing 404 is prolonged, the second packing 404 is a spiral packing, the second packing 404 is in extrusion fit with a boss of the first connecting shell 104, the boss of the first connecting shell 104 downwards extrudes the second packing 404, so that the second packing 404 is extruded and shrunk on the polished rod, the extrusion cover plate 1031 is in bolted connection with a first fixing ring 405, the movable sleeve 103 can be in bolted connection with a second fixing ring 406, reset springs 407 are arranged at equal intervals in the circumferential direction between the second fixing ring 406 and the first fixing ring 405, after the polished rod is deviated, the polished rod is reset by the elastic force of the reset springs 407, and the axial lead of the polished rod to be coincided with the axial lead of the pumping port.
The worker utilizes the inflator pump to inflate the air inlet pipe 402, gas enters the first air bag 401 and the second air bag 403, when the air pressure reaches a brake value, the worker closes the inflator pump, in the process of up-and-down reciprocating movement of the polish rod, when the mounting position of the flange mounting seat 101 deviates or the polish rod is subjected to external force to cause the polish rod to deviate, the polish rod drives the movable sleeve 103 to move along the fixed shell 102 and the extrusion cover plate 1031 towards the deviation direction, the first air bag 401 is extruded by the movable sleeve 103, the movable sleeve 103 is buffered by utilizing the gas pressure in the first air bag 401, meanwhile, the reset spring 407 deforms, collision between the movable sleeve 103 and the fixed shell 102 is avoided, meanwhile, the second packing 404 is along with the deviation of the polish rod, the second packing 404 is always wound on the polish rod and uniformly stressed, the axial line of the polish rod is reset under the action of the gas pressure in the first air bag 401 and the elastic force of the reset spring 407, the axial line of the polish rod is coincided with the axial line of the fixed shell 102, the extrusion force of the packing on one side of the second packing 404 is avoided from increasing, the abrasion speed of the second packing 404, the second packing 404 continues to be continuously stressed by the second air bag 403, and the effect of the second air bag is improved by the second air bag 403, and the second packing 404 is tightly sealed effect of the second packing 404.
When the second packing 404 needs to be replaced, the worker discharges the gas discs in the first air bag 401 and the second air bag 403, the worker firstly unscrews the bolt between the fixed shell 102 and the first connecting shell 104 through the wrench, lifts the first connecting shell 104 and parts on the first connecting shell 104, the circular boss on the lower side of the first connecting shell 104 loses extrusion with the second packing 404, the second packing 404 is taken out of the second air bag 403, meanwhile, the inside of the second air bag 403 is cleaned, the worker replaces the new second packing 404 and resets the first connecting shell 104.
According to fig. 9, the portable oil-gas seal device further comprises a supporting shell 501, the supporting shell 501 is welded on the inner side surface of the flange mounting seat 101, the inner side surface of the supporting shell 501 is in a frustum shape, the sealing sphere 502 is guided, the position deviation of the sealing sphere 502 is prevented, the sealing sphere 502 used for sealing a circular hole at the lower part of the movable sleeve 103 is arranged in the supporting shell 501 in a rolling mode, after a polish rod is broken off, the sealing sphere 502 moves to a through hole of the movable sleeve 103 through magnetic attraction and is sealed, the diameter of the through hole of the movable sleeve 103 is smaller than that of the sealing sphere 502, a cavity is arranged in the middle of the sealing sphere 502, the cavity of the sealing sphere 502 is subjected to extrusion force and buoyancy force of crude oil, the sealing effect of the sealing sphere 502 on the movable sleeve 103 is improved, the sealing sphere 502 is in rolling contact with the movable sleeve 103 and the polish rod, a magnetic block magnetically connected with the sealing sphere 502 is welded at the lower part of the movable sleeve 103, and an inclined surface matched with the sealing sphere 502 is arranged at the circular hole at the lower part of the movable sleeve 103.
The polished rod uses for a long time and can cause fatigue fracture, in the polished rod fracture falls into, sealed spheroid 502 receives magnetic attraction to remove the through-hole lower part of moving sleeve 103, sealed spheroid 502 blocks moving sleeve 103, avoid the increase of downhole pressure to take place the blowout and cause crude oil to spout from the underground and cause the wasting of resources, because the diameter of moving sleeve 103's through-hole is less than sealed spheroid 502's diameter, the increase of downhole pressure makes sealed spheroid 502 to the extrusion force of moving sleeve 103's through-hole, increase sealed spheroid 502 to moving sleeve 103's sealed effect.
According to fig. 4, still including being used for preventing that the dust from entering into the dirt proof ring 6 in the packing box 107, dirt proof ring 6 is installed in the top of pressing cap 111, dirt proof ring 6 sets up to elasticity antifriction material, dirt proof ring 6 and polished rod sliding fit, dirt proof ring 6 and polished rod sealing fit, prevent that dust impurity from entering into in the packing box 107, the life of first packing 110 has been improved, solid particle in the dust is to first packing 110 reciprocating friction, solid particle in the dust not only causes first packing 110 degree of wear to increase, and it is serious to cause polished rod wearing and tearing for a long time.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an oil field is with polished rod sealing device who has eccentric wear prevention function, including flange mount pad (101), fixed casing (102) are installed to flange mount pad (101), and fixed casing (102) are provided with circular through-hole, its characterized in that: a movable sleeve (103) is connected in the fixed shell (102) in a sliding manner, an extrusion cover plate (1031) used for sealing is fixedly connected to the fixed shell (102), the extrusion cover plate (1031) is provided with a limiting round hole, the extrusion cover plate (1031) is in sliding fit with the shoulder of the movable sleeve (103), the upper end of the movable sleeve (103) is detachably connected with a first connecting shell (104), a round boss is arranged at the lower side of the first connecting shell (104), the first connecting shell (104) is in threaded connection with a second connecting shell (105), the second connecting shell (105) is fixedly connected with a fixed sleeve (106), the fixed sleeve (106) is rotatably connected with a packing box (107), a gear ring (108) is fixedly connected to the lower side of the packing box (107), a connecting and supporting sleeve (109) used for supporting and stabilizing the packing box (107) is arranged between the packing box (107) and the second connecting shell (105), first packing (110) used for sealing the polished rod is symmetrically arranged in the packing box (107), an extrusion sealing assembly used for continuously extruding the first packing (110) is arranged at the top end of the fixing sleeve (106), the extrusion sealing assembly is matched with the first packing (110) to ensure that the first packing (110) is always attached to the polished rod, an eccentric wear prevention driving assembly is arranged on the second connecting shell (105), the polished rod moves in a reciprocating manner and is matched with the eccentric wear prevention driving assembly to ensure that the packing box (107) and the first packing (110) inside the packing box rotate along with the circumferential direction of the polished rod, the first disk root (110) is prevented from being partially worn by the polish rod;
the eccentric wear prevention driving assembly comprises an annular plate (201), the annular plate (201) is detachably mounted on a second connecting shell (105), handles are arranged on the annular plate (201) and the second connecting shell (105), the annular plate (201) is rotatably connected with a support frame (202), the support frame (202) is symmetrically connected with a friction wheel (203) through a rotating shaft, the friction wheel (203) is in extrusion fit with a polished rod, a small reduction gear box (204) is symmetrically and fixedly connected with the support frame (202), a power input end of the small reduction gear box (204) is in transmission with a rotating shaft of the adjacent friction wheel (203) through a chain wheel and a chain, the chain wheel on the rotating shaft of the friction wheel (203) is a one-way chain wheel, a spline sleeve (205) is mounted at a power output end of the small reduction gear box (204), a rotating rod (206) is symmetrically and rotatably connected with the second connecting shell (105), the upper end of the rotating rod (206) is matched with the adjacent spline sleeve (205), a transmission gear (207) meshed with a tooth ring (108) is fixedly connected at the lower end of the rotating rod (206), and the transmission gear (207) and the packing box (107) is in an intermittent rotation mode;
the extrusion seal assembly comprises a pressing cap (111), the pressing cap (111) is detachably mounted on the top end of a fixed sleeve (106), the pressing cap (111) is provided with a circular boss, circular blind holes are formed in the circumferential direction of the circular boss at equal intervals, a sliding rod (112) is slidably connected in the circular blind hole of the pressing cap (111), a first spring (113) used for continuously extruding a first disc root (110) is arranged between the sliding rod (112) and the pressing cap (111), the lower end of the sliding rod (112) is slidably connected with a rotating ring (114), and the rotating ring (114) is in extrusion fit with the first disc root (110).
2. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 1, wherein: the diameter of the circular platform at the lower part of the movable sleeve (103) is larger than that of the circular through hole of the fixed shell (102), the diameter of the circular platform at the lower part of the movable sleeve (103) is smaller than that of the fixed shell (102), a gap is formed between the movable sleeve (103) and the fixed shell (102), the movable sleeve (103) penetrates through the limiting circular hole of the extrusion cover plate (1031), and the diameter of the shoulder part of the movable sleeve (103) is smaller than that of the limiting circular hole of the extrusion cover plate (1031).
3. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 1, wherein: first packing of symmetry complex (110) sets up to the frustum shape, and first packing (110) is provided with spacing spout, and the medial surface of packing box (107) sets up to the frustum shape, and the medial surface symmetry of packing box (107) is provided with the deflector, and the spacing spout of first packing (110) cooperates with the deflector in packing box (107) for prevent that first packing (110) and packing box (107) from skidding.
4. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 1, wherein: symmetrical formula is provided with sealed piece (301) that are used for pressing from both sides tight sealed polished rod in first connecting shell (104), symmetrical complex sealed piece (301) lower part sets up to round platform shape and upper portion and sets up to the frustum shape, symmetrical complex sealed piece (301) lower part round platform and first connecting shell (104) sealed cooperation, one of them sealed piece (301) symmetry is provided with circular blind hole, and be provided with second spring (302) in the circular blind hole, second spring (302) and offside sealed piece (301) rigid coupling, sealed piece (301) and second connecting shell (105) extrusion fit, be used for sealed polished rod.
5. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 4, wherein: the through hole at the lower part of the second connecting shell (105) is provided with a frustum-shaped inclined surface for extruding the sealing block (301).
6. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 2, wherein: the device is characterized by further comprising a partial wear buffering mechanism for preventing the polished rod from vibrating, the partial wear buffering mechanism is arranged in the fixed shell (102), the partial wear buffering mechanism comprises a first air bag (401) used for buffering, the first air bag (401) is arranged in a gap between the fixed shell (102) and the movable sleeve (103), the fixed shell (102) is communicated with an air inlet pipe (402), the air inlet pipe (402) is communicated with the first air bag (401), a valve is arranged in the air inlet pipe (402), a second air bag (403) used for continuously providing extrusion force is arranged in the movable sleeve (103), vent holes are formed in the movable sleeve (103) at equal intervals along the axis direction, the first air bag (401) and the second air bag (403) are communicated with the vent holes of the movable sleeve (103), a second packing (404) wound on the polished rod is arranged in the second air bag (403), the second packing (404) is matched with a boss of the first connecting shell (104) in an extruding mode, the first connecting shell (104) is used for extruding the second packing (404) downwards to seal the polished rod, a first extruding cover plate (1031) is provided with a first fixing ring (405), and a second fixing ring (405) is arranged between the detachable fixing ring (406), and a fixing ring (405) and a fixing ring (406).
7. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 1, wherein: still including supporting shell (501), supporting shell (501) rigid coupling in flange mount pad (101) medial surface, the medial surface of supporting shell (501) sets up to the frustum shape, it is provided with sealed spheroid (502) that are used for sealed movable sleeve (103) lower part round hole to roll in supporting shell (501), sealed spheroid (502) and movable sleeve (103) and polished rod rolling contact, the lower part of movable sleeve (103) is provided with the magnetic block of being connected with sealed spheroid (502) magnetism, movable sleeve (103) lower part round hole department is provided with the inclined plane with sealed spheroid (502) complex.
8. The polish rod sealing device with the eccentric wear prevention function for the oilfield according to claim 1, wherein: still including being used for preventing that the dust from entering into dust ring (6) in packing box (107), dust ring (6) are installed in the top of pressing cap (111), and dust ring (6) set up to the anti friction material of elasticity, and dust ring (6) and polished rod sliding fit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211169447.2A CN115263226B (en) | 2022-09-26 | 2022-09-26 | Polished rod sealing device with eccentric wear prevention function for oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211169447.2A CN115263226B (en) | 2022-09-26 | 2022-09-26 | Polished rod sealing device with eccentric wear prevention function for oil field |
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| CN115263226A CN115263226A (en) | 2022-11-01 |
| CN115263226B true CN115263226B (en) | 2022-12-20 |
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| CN202211169447.2A Active CN115263226B (en) | 2022-09-26 | 2022-09-26 | Polished rod sealing device with eccentric wear prevention function for oil field |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116717211B (en) * | 2023-08-10 | 2023-11-28 | 陕西斯锐明天智能设备有限公司 | Self-sealing packing box |
| CN116971744B (en) * | 2023-09-20 | 2023-12-15 | 盐城市荣嘉机械制造有限公司 | Rotary self-sealing blowout preventer with external clamping mechanism |
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| CN101158277A (en) * | 2007-11-09 | 2008-04-09 | 张建国 | Multifunctional polish rod sealing device |
| CN201065748Y (en) * | 2007-06-29 | 2008-05-28 | 田君华 | Eccentric wear prevention stuffing box |
| CN101725329A (en) * | 2008-10-29 | 2010-06-09 | 天津东日机械有限责任公司 | Wellhead sealing device |
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| CN101963050A (en) * | 2010-10-08 | 2011-02-02 | 高洪江 | Sucker rod deviation-based anti-eccentric wear sealing packing box |
| CN103790544A (en) * | 2014-01-09 | 2014-05-14 | 常州大学 | Airtight leak-prevention method for sealing gaps between wellhead packing box and polished rod |
| CN206091925U (en) * | 2016-10-26 | 2017-04-12 | 刘恩 | Eccentric wear prevention sealing load automatic tracking beam -pumping unit polished rod packing box |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1195242A (en) * | 1982-05-06 | 1985-10-15 | Allen E. Harris | High temperature packer with low temperature setting capabilities |
| CN201065748Y (en) * | 2007-06-29 | 2008-05-28 | 田君华 | Eccentric wear prevention stuffing box |
| CN101158277A (en) * | 2007-11-09 | 2008-04-09 | 张建国 | Multifunctional polish rod sealing device |
| CN101725329A (en) * | 2008-10-29 | 2010-06-09 | 天津东日机械有限责任公司 | Wellhead sealing device |
| CN101864917A (en) * | 2010-06-25 | 2010-10-20 | 辽宁中瑞科技有限公司 | Random and automatic regulating polished rod sealing device of oil pumping machine |
| CN101963050A (en) * | 2010-10-08 | 2011-02-02 | 高洪江 | Sucker rod deviation-based anti-eccentric wear sealing packing box |
| CN103790544A (en) * | 2014-01-09 | 2014-05-14 | 常州大学 | Airtight leak-prevention method for sealing gaps between wellhead packing box and polished rod |
| CN206091925U (en) * | 2016-10-26 | 2017-04-12 | 刘恩 | Eccentric wear prevention sealing load automatic tracking beam -pumping unit polished rod packing box |
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| CN115263226A (en) | 2022-11-01 |
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Inventor after: Wang Ying Inventor after: Zhang Kai Inventor after: Zhuang Hao Inventor after: Shi Shaoshuai Inventor after: Li Wenwen Inventor after: Zhu Cuixiang Inventor after: Li Xiangxiang Inventor after: Gao Jingwei Inventor before: ShangGuan Dean Inventor before: Zhu Cuixiang Inventor before: Li Xiangxiang Inventor before: Gao Jingwei Inventor before: Yu Jijun Inventor before: Qi Guangjun Inventor before: Peng Guibin Inventor before: Wang Ying Inventor before: Zhang Kai Inventor before: Zhuang Hao Inventor before: Shi Shaoshuai Inventor before: Li Wenwen |
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