A real-time compensation device for sucker rod packing seal

Abstract

The present invention relates to a sucker rod packing seal follow-up real-time compensation device, the device comprising a fixed mounting seat (1), a follow-up pressing shell (2), a ratchet (3), a packing pressing sleeve (4), a spring mounting sleeve (5), an inner compression spring (6), an outer compression spring (7) and a pressure ring (8), wherein the follow-up pressing shell (2) is sleeved on the upper part of the fixed mounting seat (1), the ratchet (3) is meshed with a ratchet rack (23), the packing pressing sleeve (4) is arranged in a lower opening cavity (21), the spring mounting sleeve (5) is arranged in a stepped mounting hole (41), the inner compression spring (6) is arranged in the stepped mounting hole (41), the outer compression spring (7) is sleeved on the upper part of the spring mounting sleeve (5), and the pressure ring (8) is connected to the sucker rod. The present invention has a simple and novel structure and practical functions, and utilizes the reciprocating motion of the sucker rod to perform real-time compensation on the elastic force of the compression spring, thereby pressurizing and tightening the packing seal ring in real time.

Description

Technical Field

[0001] The invention relates to the technical field of sucker rod seals, and in particular to a sucker rod packing seal follow-up real-time compensation device. Background Art

[0002] The sucker rod is a slender rod in the oil well. It is connected to the oil pump at the top and the oil pump at the bottom. It reciprocates up and down in the oil well and plays the role of transmitting power.

[0003] The seal between the sucker rod and the oil wellhead is sealed with a packing. The packing seal will wear as the sucker rod reciprocates up and down. When the packing seal is worn and the seal is not tight, workers are required to manually pressurize the packing seal to seal it, which increases the labor intensity of workers. If the maintenance and pressurization are not timely, the seal of the packing seal to the sucker rod will be affected, and pressure imbalance will cause oil leakage, which greatly affects the oil pumping efficiency and the oil pumping effect. There is also an improved structure for the sucker rod packing seal, which is to pressurize the packing seal with a compression spring to elastically pressurize the packing seal. When the packing seal is worn and the seal is not tight, the elastic force of the compression spring is used to pressurize the packing seal in real time. However, when the improved structure is actually used, the compression spring will gradually stretch, and the elastic force will gradually weaken and become smaller, and the effect of real-time pressurization and sealing of the packing seal is poor. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and provide a sucker rod packing seal follow-up real-time compensation device, which has a simple and novel structure and practical functions. The device utilizes the up and down reciprocating motion of the sucker rod to compensate for the elastic force of the compression spring in real time, and pressurizes and tightens the packing seal in real time, so that the elastic force of the compression spring is stable. The real-time pressurization and tightening of the packing seal has a good elastic sealing effect, which is beneficial to improving the oil pumping efficiency and the oil pumping effect.

[0005] The technical solution adopted by the present invention is: a sucker rod packing seal follow-up real-time compensation device, including a fixed mounting seat 1, a follow-up pressing shell 2, a ratchet 3, a packing pressing sleeve 4, a spring mounting sleeve 5, an inner compression spring 6, an outer compression spring 7 and a pressure ring 8. The fixed mounting seat 1 has a "convex" shape, and is provided with a lower fixed seat plate 11 and an upper mounting column 12. The middle of the fixed mounting seat 1 is provided with a mounting inner hole 13, and the lower fixed seat plate 11 is evenly provided with a plurality of mounting protrusions 14. A packing seal is installed in the installation inner hole 13, a lower opening cavity 21 is provided in the middle of the follow-up pressing shell 2, a sliding through hole 22 is provided in the middle of the top wall of the follow-up pressing shell 2, and a ratchet rack 23 is provided on the outer side. The follow-up pressing shell 2 is sleeved on the top of the fixed mounting seat 1, and the upper mounting column 12 is inserted into the lower opening cavity 21. The pawl 3 is hingedly connected to the mounting protrusion 14 through a hinge pin, and a torsion spring is provided between the pawl 3 and the mounting protrusion 14. The pawl 3 is meshed with the ratchet rack 23. The packing compression sleeve 4 is arranged in the lower opening cavity 21, and a stepped mounting hole 41 is arranged in the middle of the packing compression sleeve 4. The lower end of the packing compression sleeve 4 is inserted into the mounting inner hole 13, and contacts with the packing sealing ring, and the upper end contacts with the inner side of the top wall of the follower compression housing 2. A positioning convex ring 51 is arranged on the outer side surface of the spring mounting sleeve 5, and the spring mounting sleeve 5 is arranged in the stepped mounting hole 41. The positioning convex ring 51 contacts with the inner side of the top wall of the follower compression housing 2, and the upper part of the spring mounting sleeve 5 passes through the sliding The dynamic hole 22 extends to the outside of the follow-up clamping shell 2, the inner compression spring 6 is arranged in the stepped mounting hole 41, the upper end of the inner compression spring 6 is sleeved on the lower part of the spring mounting sleeve 5, and contacts with the positioning convex ring 51, and the lower end contacts with the step surface of the stepped mounting hole 41, the outer compression spring 7 is sleeved on the upper part of the spring mounting sleeve 5, and the lower end of the outer compression spring 7 contacts with the outer side of the top wall of the follow-up clamping shell 2, the pressure ring 8 is arranged above the spring mounting sleeve 5, and the pressure ring 8 is connected to the sucker rod.

[0006] A further improvement is that a cover plate 9 is provided at the upper end of the spring mounting sleeve 5 , and the upper end of the external compression spring 7 is in contact with the cover plate 9 .

[0007] A further improvement is that a first telescopic dust cover is provided outside the follow-up pressing shell 2, the upper end of the first telescopic dust cover is connected to the follow-up pressing shell 2, and the lower end is connected to the lower fixed seat plate 11.

[0008] A further improvement is that a second telescopic dust cover is provided on the outside of the outer compression spring 7 , the upper end of the second telescopic dust cover is connected to the cover plate 9 , and the lower end is connected to the follower pressing shell 2 .

[0009] A further improvement is that the pressure ring 8 includes a semicircular ring and a fastening screw, and the two semicircular rings are symmetrically arranged and connected by the fastening screw.

[0010] A further improvement is that the pressure ring 8 includes a semicircular ring, a pin shaft and a fastening screw. The two semicircular rings are symmetrically arranged, one end of which is hingedly connected by a pin shaft, and the other end is connected by a fastening screw.

[0011] Compared with the prior art, the present invention has the following beneficial effects: simple and novel structure, practical functions, and utilizes the up and down reciprocating motion of the sucker rod to compensate for the elastic force of the compression spring in real time, and to pressurize and tighten the packing seal in real time, so that the elastic force of the compression spring is stable, and the real-time pressurization and tightening of the packing seal has a good elastic sealing effect, which is beneficial to improving the oil pumping efficiency and the oil pumping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0014] like Figure 1As shown, a sucker rod packing seal follow-up real-time compensation device includes a fixed mounting seat 1, a follow-up pressing shell 2, a ratchet 3, a packing pressing sleeve 4, a spring mounting sleeve 5, an inner compression spring 6, an outer compression spring 7 and a pressure ring 8. The fixed mounting seat 1 has a "convex" shape, and is provided with a lower fixed seat plate 11 and an upper mounting column 12. An installation inner hole 13 is provided in the middle of the fixed mounting seat 1. A plurality of installation protrusions 14 are evenly provided on the lower fixed seat plate 11. A packing seal is installed in the installation inner hole 13. A lower opening cavity 21 is provided in the middle of the follow-up pressing shell 2. A sliding through hole 22 is provided in the middle of the top wall of the follow-up pressing shell 2. A ratchet rack 23 is provided on the outer side surface. The follow-up pressing shell 2 sets Installed above the fixed mounting seat 1, the upper mounting column 12 is inserted into the lower open cavity 21, the follower pressing shell 2 can slide freely up and down on the upper mounting column 12, and a first telescopic dust cover is provided on the outside of the follower pressing shell 2. The upper end of the first telescopic dust cover is connected to the follower pressing shell 2, and the lower end is connected to the lower fixed seat plate 11. The pawl 3 is hingedly connected to the mounting protrusion 14 through a hinge pin, and a torsion spring is provided between the pawl 3 and the mounting protrusion 14. The pawl 3 is meshed with the ratchet rack 23. The pawl 3 and the ratchet rack 23 constitute a rack ratchet mechanism for the unidirectional intermittent downward movement of the follower pressing shell 2 to prevent the follower pressing shell 2 from moving upward. The packing compression sleeve 4 is arranged in the lower open cavity 21, and the packing A stepped mounting hole 41 is provided in the middle of the packing compression sleeve 4, the lower end of the packing compression sleeve 4 is inserted into the mounting inner hole 13 and contacts the packing sealing ring, and the upper end contacts the inner side of the top wall of the follower compression housing 2. The packing compression sleeve 4 has a compression and sealing effect on the packing sealing ring and a supporting and positioning effect on the follower compression housing 2. A positioning convex ring 51 is provided on the outer side surface of the spring mounting sleeve 5, the spring mounting sleeve 5 is arranged in the stepped mounting hole 41, the positioning convex ring 51 contacts the inner side of the top wall of the follower compression housing 2, the upper part of the spring mounting sleeve 5 extends to the outside of the follower compression housing 2 through the sliding hole 22, the inner compression spring 6 is arranged in the stepped mounting hole 41, and the upper end of the inner compression spring 6 is sleeved on the spring mounting sleeve 5. The lower part of the sleeve 5 contacts with the positioning convex ring 51, and the lower end contacts with the step surface of the stepped mounting hole 41. The external compression spring 7 is sleeved on the upper part of the spring mounting sleeve 5, and the lower end of the external compression spring 7 contacts with the outer side of the top wall of the follow-up clamping shell 2. The pressure ring 8 is arranged above the spring mounting sleeve 5, and the pressure ring 8 is connected to the sucker rod. The pressure ring 8 includes a semicircular ring and a fastening screw. The two semicircular rings are symmetrically arranged and connected by the fastening screws. A cover plate 9 is arranged at the upper end of the spring mounting sleeve 5. The upper end of the external compression spring 7 contacts with the cover plate 9. A second telescopic dust cover is arranged on the outside of the external compression spring 7. The upper end of the second telescopic dust cover is connected to the cover plate 9, and the lower end is connected to the follow-up clamping shell 2.

[0015] In order to facilitate the installation and use of the pressure ring 8, the technical solution is further improved as follows: the pressure ring 8 includes a semicircular ring, a pin shaft and a fastening screw. The two semicircular rings are symmetrically arranged, one end of which is hingedly connected by a pin shaft, and the other end is connected by a fastening screw.

[0016] The sucker rod packing seal follow-up real-time compensation device is fixedly installed on the oil well head through the lower fixed seat plate 11, and the sucker rod is inserted into the inner hole of the cover pressure plate 9, the inner hole of the spring mounting sleeve 5, the inner compression spring 6, the stepped mounting hole 41, the packing seal and the mounting inner hole 13 in the device from top to bottom.

[0017] The first telescopic dustproof sleeve in the sucker rod packing seal follow-up real-time compensation device plays a role in dust and water protection for the rack ratchet mechanism formed by the pawl 3 and the ratchet rack 23, and the second telescopic dustproof sleeve plays a role in dust and water protection for the external compression spring 7, which is beneficial to improving the service life and operation effect of the device.

[0018] The working principle of the sucker rod packing seal follow-up real-time compensation device is as follows: when the sucker rod drives the pressure ring 8 to move upward and the pressure ring 8 is separated from the cover pressure plate 9, the device is in a pre-pressurized state. At this time, the outer compression spring 7 is in an extended and non-pressurized state, the inner compression spring 6 is in a pre-pressurized state, the pawl 3 is engaged with the lower ratchet teeth of the ratchet rack 23, the upper end of the packing compression sleeve 4 is in contact with the inner side of the top wall of the follow-up compression shell 2, the positioning convex ring 51 is in contact with the inner side of the top wall of the follow-up compression shell 2, and the inner compression spring 6 pre-presses the packing seal ring through the packing compression sleeve 4;

[0019] When the sucker rod drives the pressure ring 8 to move downward, and the pressure ring 8 contacts and presses down with the cover pressure plate 9, the device is in a pressurized compensation state. At this time, the external compression spring 7 is in a contracted pressurized state, and the follower pressing shell 2 is elastically pressurized. The spring mounting sleeve 5 moves downward, and the positioning convex ring 51 is separated from the inner side of the top wall of the follower pressing shell 2, and the internal compression spring 6 is compressed downward. The internal compression spring 6 is in a heavily pressurized state, and the internal compression spring 6 presses the packing seal ring heavily through the packing pressing sleeve 4;

[0020] When the packing seal is worn and not sealed tightly, under the pre-stressed or re-stressed elastic force of the internal compression spring 6, the packing compression sleeve 4 moves downward to compress and seal the packing seal. When the device is in the pre-stressed state, the pre-stressed height of the internal compression spring 6 becomes higher, the pre-stressed elastic force of the internal compression spring 6 is weakened, and the upper end of the packing compression sleeve 4 is separated from the inner side of the top wall of the follow-up compression shell 2 to form a gap. When the device is in the pressurized compensation state, the follow-up compression shell 2 moves downward under the pressurized elastic force of the external compression spring 7, and the pawl 3 is separated from the lower ratchet tooth of the ratchet rack 23, slides over the lower ratchet tooth and meshes with the upper ratchet tooth. At this time, the unidirectional intermittent downward movement of the follow-up compression shell 2 causes the upper end of the packing compression sleeve 4 to contact the inner side of the top wall of the follow-up compression shell 2 again, thereby restoring the support and positioning of the follow-up compression shell 2, and compressing and restoring the pre-stressed height and pre-stressed elastic force of the internal compression spring 6;

[0021] The downward movement of the sucker rod is used as the power drive, and the unidirectional intermittent downward movement mechanism function of the rack-type ratchet mechanism composed of the pawl 3 and the ratchet rack 23 is used to make the follower compression housing 2 move downward unidirectionally and intermittently, so that the pre-stressed elastic force of the internal compression spring 6 is stabilized, thereby realizing real-time compensation for the elastic force of the internal compression spring 6 and real-time pressurization and sealing of the packing seal.

[0022] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A sucker rod packing seal follow-up real-time compensation device, characterized in that: The invention comprises a fixed mounting seat (1), a follower pressing shell (2), a ratchet (3), a packing pressing sleeve (4), a spring mounting sleeve (5), an inner compression spring (6), an outer compression spring (7) and a pressure ring (8); the fixed mounting seat (1) has a "convex" shape and is provided with a lower fixed seat plate (11) and an upper mounting column (12); a mounting inner hole (13) is provided in the middle of the fixed mounting seat (1); a plurality of mounting protrusions (14) are evenly provided on the lower fixed seat plate (11); a packing sealing ring is installed in the mounting inner hole (13); a lower opening cavity (21) is provided in the middle of the follower pressing shell (2); a sliding through hole is provided in the middle of the top wall of the follower pressing shell (2) (22), a ratchet rack (23) is arranged on the outer side surface, the follower pressing shell (2) is sleeved on the top of the fixed mounting seat (1), the upper mounting column (12) is inserted into the lower open cavity (21), the pawl (3) is hingedly connected with the mounting protrusion (14) through a hinge pin, a torsion spring is arranged between the pawl (3) and the mounting protrusion (14), the pawl (3) is meshed with the ratchet rack (23), the packing pressing sleeve (4) is arranged in the lower open cavity (21), a stepped mounting hole (41) is arranged in the middle of the packing pressing sleeve (4), the lower end of the packing pressing sleeve (4) is inserted into the mounting inner hole (13) and contacts with the packing sealing ring, and the upper end is in contact with the top wall of the follower pressing shell (2). The spring mounting sleeve (5) is provided with a positioning convex ring (51) on its outer side. The spring mounting sleeve (5) is arranged in the stepped mounting hole (41). The positioning convex ring (51) contacts the inner side of the top wall of the follower pressing housing (2). The upper part of the spring mounting sleeve (5) passes through the sliding hole (22) and extends to the outside of the follower pressing housing (2). The inner compression spring (6) is arranged in the stepped mounting hole (41). The upper end of the inner compression spring (6) is sleeved on the lower part of the spring mounting sleeve (5) and contacts the positioning convex ring (51). The lower end of the inner compression spring (6) contacts the step surface of the stepped mounting hole (41). The outer compression spring (7) is sleeved on the upper part of the spring mounting sleeve (5). The lower end of the spring (7) contacts the outer side of the top wall of the follow-up pressing shell (2); the pressure ring (8) is arranged above the spring mounting sleeve (5); the pressure ring (8) is connected to the sucker rod; the upper end of the spring mounting sleeve (5) is provided with a cover pressure plate (9); the upper end of the external compression spring (7) contacts the cover pressure plate (9); the outside of the follow-up pressing shell (2) is provided with a first telescopic dustproof sleeve; the upper end of the first telescopic dustproof sleeve is connected to the follow-up pressing shell (2); and the lower end is connected to the lower fixed seat plate (11); the outside of the external compression spring (7) is provided with a second telescopic dustproof sleeve; the upper end of the second telescopic dustproof sleeve is connected to the cover pressure plate (9); and the lower end is connected to the follow-up pressing shell (2).

2. The sucker rod packing seal follow-up real-time compensation device according to claim 1 is characterized in that: The pressure ring (8) comprises a semicircular ring and a fastening screw, and the two semicircular rings are symmetrically arranged and connected by the fastening screw.

3. The sucker rod packing seal follow-up real-time compensation device according to claim 1, characterized in that: The pressure ring (8) comprises a semicircular ring, a pin shaft and a fastening screw. The two semicircular rings are symmetrically arranged, one end of which is hingedly connected by the pin shaft, and the other end of which is connected by the fastening screw.

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