CN114622838A

CN114622838A - Eccentric wear prevention comprehensive protection device for sucker rod

Info

Publication number: CN114622838A
Application number: CN202210184005.9A
Authority: CN
Inventors: 王超; 王东伟; 张化莱
Original assignee: Huayun Longteng Machinery Manufacturing Co ltd
Current assignee: Huayun Longteng Machinery Manufacturing Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-06-14
Anticipated expiration: 2042-02-28
Also published as: CN114622838B

Abstract

The utility model provides an eccentric wear prevention integrated protection device of sucker rod, relate to oil field oil pumping auxiliary device technical field, which comprises a housin, be provided with direction chute cover and guide post cover in the casing, the guide post cover below is provided with bears the cover, be provided with intermittent stepping drive assembly between bearing cover and the guide post cover, intermittent stepping drive assembly includes the centre ring, install a shifting block on the centre ring, the shifting block stretches out the centre ring outer fringe on the horizontal direction, bear the cover upper end inboard and have the ring gear, the intertooth of ring gear is used for holding the shifting block, thereby restricted centre ring both-way rotation, guide post cover lower extreme fixedly connected with is used for the shifting block from the play part of intertooth play and is used for promoting the shifting block pivoted ejector pad after playing. The invention rotates one step at intervals, greatly reduces the rotation frequency of the sucker rod string, and has the function of preventing the sucker rod string from rotating forwards or reversely accidentally, thereby fully ensuring the friction uniformity and avoiding eccentric wear.

Description

Eccentric wear prevention comprehensive protection device for sucker rod

Technical Field

The invention belongs to the technical field of oil pumping auxiliary devices in oil fields, and particularly relates to an eccentric wear prevention comprehensive protection device for a sucker rod.

Background

Because of well deviation, well bottom deformation and other reasons, the up-and-down reciprocating motion of the sucker rod of the beam pumping unit inevitably generates eccentric wear with an oil pipe, in order to reduce the eccentric wear, the current common practice is to arrange a sucker rod eccentric wear prevention protection device, and the basic principle is to convert the up-and-down reciprocating motion of the sucker rod into the unidirectional rotation motion of the sucker rod, thereby reducing the problem of the eccentric wear. In a specific structure, the reciprocating motion is converted into the rotating motion vertically through the switching of the guide post in the guide slideway. But the sucker rod post is in the rotation state all the time under such circumstances, and when the sucker rod transmitted rotary motion from top to bottom, can make torsion not in time transmit because of the effect of resistance, finally lead to torsion accumulation on the sucker rod post big, the consequence is: on one hand, each threaded connection part of the sucker rod string is excessively pre-tightened, even a thread buckle is damaged, and on the other hand, the torsion can cause the sucker rod to deform and even break.

Disclosure of Invention

In order to solve the problem that the accumulated torsion of the sucker rod is too large because the sucker rod is always in a rotating state, the invention provides the intermittent stepping type sucker rod eccentric wear prevention comprehensive protection device.

The technical scheme provided by the invention is as follows: the sucker rod eccentric wear prevention comprehensive protection device comprises a shell, wherein a guide slideway sleeve and a guide column sleeve are arranged in the shell, the guide slideway sleeve is fixed relative to the shell, a guide slideway is arranged on the inner wall of the guide slideway sleeve, a guide column is arranged on the outer wall of the guide column sleeve, the guide column extends into the guide slideway, so that the vertical reciprocating motion of the guide column sleeve relative to the guide slideway sleeve is converted into relative rotary motion, a bearing sleeve is arranged in the shell below the guide column sleeve, a thrust bearing is arranged between the bearing sleeve and the guide column sleeve, the guide column sleeve and the bearing sleeve are in clearance fit with a sucker rod, a positioning sleeve is arranged between the outer side of the bearing sleeve and the shell, the positioning sleeve is fixed relative to the shell, a linear groove is arranged on the inner wall of the positioning sleeve in the vertical direction, a guide column is arranged on the outer wall of the bearing sleeve, the guide column extends into the linear groove, so that the bearing sleeve generates vertical displacement relative to the positioning sleeve, a disc spring A is arranged between the bearing sleeve and the bottom surface of the shell, and an intermittent stepping transmission assembly is arranged between the bearing sleeve and the guide column sleeve; the intermittent stepping type transmission assembly comprises a center ring, the center ring is fixedly connected with a sucker rod, a thrust bearing is arranged between the center ring and a bearing sleeve, a shifting block is arranged on the center ring, the shifting block extends out of the outer edge of the center ring in the horizontal direction, the shifting block is arranged on the center ring through at least two vertically arranged long studs, a spring A is arranged between the lower end surface of the center ring and the studs, the shifting block has a tendency of leaning against the center ring under the action of the spring A, a gear ring is arranged on the inner side of the upper end of the bearing sleeve, and tooth spaces of the gear ring are used for accommodating the shifting block, so that the bidirectional rotation of the center ring is limited, and a pulling-out part for pulling out the shifting block from the tooth spaces and a pushing block for pushing the pulled-out shifting block to rotate are fixedly connected to the lower end of a guide column sleeve; the lifting component comprises an inclined block, an installation shaft, a connecting rod, a sliding sleeve and a spring B, wherein the installation shaft is positioned on the inclined block, the sliding sleeve is sleeved on the installation shaft in a sliding manner, the lower part of the connecting rod is fixedly connected to the sliding sleeve, the upper part of the fixing rod is fixedly connected to the guide column sleeve, the spring B is sleeved on the installation shaft, and under the action of the spring B, the sliding sleeve has the tendency of being positioned on the upward slope of the inclined block; one end of the shifting block far away from the gear ring is provided with an inclined surface, and the inclined surface is matched with the inclined block to lift the shifting block out of the gear.

The further scheme is as follows: the upper part of the teeth of the toothed ring is of a trapezoidal structure.

The further scheme is as follows: a disc spring B is arranged above the guide column sleeve, the elastic modulus of the disc spring B is smaller than that of the disc spring A, a spacer ring is arranged between the guide column sleeve and the disc spring, the spacer ring is in clearance fit with the sucker rod, and a thrust bearing is arranged between the spacer ring and the guide column sleeve.

The further scheme is as follows: a spacer ring is arranged above the guide column sleeve, a thrust bearing is arranged between the spacer ring and the guide column sleeve, and the upper end of the center ring is pressed on the spacer ring.

Compared with the prior art, the invention has the following beneficial effects:

1. the intermittent stepping type transmission assembly can realize that the guide post sleeve rotates for a circle, and the shifting block rotates for only one tooth width, so that the rotating frequency and the rotating speed of the sucker rod are greatly reduced, the time for digesting the torsion of the sucker rod is prolonged, the torsion existing on the sucker rod is reduced, the thread buckle is prevented from being damaged, and the distortion and the deformation of the sucker rod are avoided.

2. In the prior art, in order to avoid the reverse rotation of the sucker rod, a one-way bearing is generally adopted, but the one-way bearing cannot avoid the accidental forward rotation or accidental reverse rotation of the sucker rod.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged view of a dotted square portion in fig. 1.

Figure 3 is a top view of the center ring and load ring portions of the present invention.

Fig. 4 is a top view of the guide post sleeve.

Fig. 5 is a view from a-a in fig. 4.

Fig. 6 is a schematic perspective view of a lift-out member of the present invention.

Fig. 7 is a schematic perspective view of the dial block of the present invention.

FIG. 8 is a schematic view of the process of the pusher and the ramp pushing the paddle from one tooth to the other.

Icon: 1. a disc spring B; 2. a guide chute sleeve; 3. a spacer ring; 4. a housing; 5. a bearing sleeve; 6. a positioning sleeve; 7. a push block; 8. shifting blocks; 9. a long stud; 10. a center ring; 11. a disc spring A; 12. a sucker rod; 13. a connecting rod; 14. a sloping block; 15. a spring B; 16. installing a shaft; 17. a sliding sleeve; 18. teeth; 19. a guide post sleeve; 20. and a spring A.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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.

The embodiment provides a sucker rod 12 prevents eccentric wear comprehensive protection device, including casing 4, be provided with direction slide way cover 2 and guide post cover 19 in the casing 4, direction slide way cover 2 is fixed for casing 4 relatively, and 2 inner walls of direction slide way cover have a direction slide way, and 19 outer walls of guide post cover have a guide post, and the guide post stretches into in the direction slide way to the guide post cover 19 is relative to the up-and-down motion transformation of direction slide way cover 2 and is relative rotary motion, above for the technique that exists among the prior art, and it is here not repeated.

The innovation points of the embodiment are as follows: a bearing sleeve 5 is arranged in the shell 4 below the guide column sleeve 19, and the bearing sleeve 5 is used for bearing the weight of the sucker rod 12 column. A thrust bearing is arranged between the bearing sleeve 5 and the guide post sleeve 19, and the guide post sleeve 19 can rotate relative to the bearing sleeve 5 under the condition that the bearing sleeve does not rotate. The guide post sleeve 19 and the bearing sleeve 5 are in clearance fit with the sucker rod 12. The positioning sleeve 6 is arranged between the outer side of the bearing sleeve 5 and the shell 4, the positioning sleeve 6 is fixed relative to the shell 4, a linear groove is formed in the vertical direction of the inner wall of the positioning sleeve 6, a guide post is arranged on the outer wall of the bearing sleeve 5 and extends into the linear groove, the positioning sleeve 6 is used for providing a vertical guide track for the bearing sleeve 5, and when the load of the upper stroke and the lower stroke of the sucker rod 12 are changed, due to the fact that the disc spring A11 is arranged between the bearing sleeve 5 and the bottom surface of the shell 4, the bearing sleeve 5 can vertically displace relative to the shell 4 under the effect of the disc spring A11. The intermittent stepping transmission assembly is arranged between the bearing sleeve 5 and the guide post sleeve 19, is the greatest innovation point of the invention, and has the functions of reducing the rotation frequency of the sucker rod 12, increasing the time for the sucker rod 12 to digest torsion, reducing the torsion existing on the sucker rod 12, avoiding the damage of a thread buckle caused by large torsion and avoiding the distortion and deformation of the sucker rod 12.

The intermittent stepping transmission assembly comprises a center ring 10, wherein the center ring 10 is fixedly connected with a sucker rod 12, so that the center ring and the sucker rod 12 synchronously move. A thrust bearing is arranged between the central ring 10 and the bearing sleeve 5, so that the central ring 10 can rotate relative to the bearing sleeve 5 when the bearing sleeve 5 does not rotate. The central ring 10 is provided with a shifting block 8, the shifting block 8 extends out of the outer edge of the central ring 10 in the horizontal direction, the shifting block 8 is arranged on the central ring 10 through at least two vertically arranged long studs 9, the two studs can ensure that the shifting block 8 does not rotate on the central ring 10, a spring A20 is arranged between the lower end face of the central ring 10 and the studs, the shifting block 8 has the tendency of leaning against the central ring 10 under the action of a spring A20, but the shifting block 8 is pulled upwards by overcoming the elasticity of the spring, and the shifting block 8 can be raised to a certain height. The inner side of the upper end of the bearing sleeve 5 is provided with a gear ring, the tooth space of the gear ring is used for accommodating the shifting block 8, and the shifting block 8 is positioned between the tooth spaces under the normal state, so that the accidental bidirectional rotation of the central ring 10 and the accidental bidirectional rotation of the sucker rod 12 are limited. The lower end of the guide column sleeve 19 is fixedly connected with a pulling-out component used for pulling the shifting block 8 out of the tooth space and a pushing block 7 used for pushing the pulled-out shifting block 8 to rotate. The lifting part comprises an inclined block 14, a mounting shaft 16, a connecting rod 13, a sliding sleeve 17 and a spring B15, wherein the mounting shaft 16 is positioned on the inclined block 14, the sliding sleeve is sleeved on the mounting shaft 16 in a sliding manner, the lower part of the connecting rod 13 is fixedly connected to the sliding sleeve, the upper part of the fixing rod is fixedly connected to a guide column sleeve 19, the spring B15 is sleeved on the mounting shaft 16, and the sliding sleeve has a tendency of being positioned on the upward slope of the inclined block 14 under the action of a spring B15; the end of the shifting block 8 far away from the gear ring is provided with an inclined surface, the inclined surface is matched with the inclined block 14 to lift the shifting block 8 out of the tooth space, and particularly, after the inclined block 14 is contacted with the inclined surface of the shifting block 8, the spring B15 is compressed in the process of pulling out the shifting block 8, so that as shown in fig. 8, the actual position of the inclined block 14 lags behind the position of the inclined block 14 when the spring is not compressed in a theoretical state, and thus after the shifting block 8 is separated from the inclined block 14, the inclined block 14 is reset by the elastic force of the spring B15, a space is provided for the shifting block 8 to fall back again after resetting, and the shifting block 8 is prevented from impacting the inclined block 14 when falling back. In reality, the meaning of limiting the accidental bidirectional rotation of the sucker rod 12 is very important, and if the bidirectional rotation of the sucker rod 12 is not limited, the sucker rod 12 is likely to be just pulled to rotate by one tooth space, but because the accidental rotation is not limited, the sucker rod 12 rotates by one angle under the conditions of well conditions and self positions, or the sucker rod 12 rotates by one angle in the forward direction, the condition that the sucker rod 12 still has eccentric wear at a certain angle is caused, so that in order to thoroughly play a role of preventing the eccentric wear, the intermittent stepping type transmission assembly in the embodiment plays a role of preventing the accidental forward rotation or accidental reverse rotation of the sucker rod 12 column, the uniformity of friction is fully ensured, and the eccentric wear is avoided.

The working principle of the intermittent stepping transmission assembly is as follows: in the process of the reciprocating motion of the sucker rod 12, the guide column sleeve 19 continuously converts the reciprocating motion into rotary motion, and when the guide column sleeve 19 rotates for a circle, the push block 7 and the pulling-out part below the guide column sleeve are contacted with the shifting block 8 and push the shifting block 8 to rotate once, as shown in fig. 8, the whole process of 'the inclined block 14 pulls out the shifting block 8-the push block 7 pushes the shifting block 8-the shifting block 8 falls into the space between the teeth again' is recorded in fig. 8, wherein: the dashed triangle represents the position of the swash block 14 if the spring B15 is not compressed; the bold line triangle represents the position of the swash block 14 in the actual state; the bold line box represents the push block 7 position; the thin line trapezoidal structure represents a tooth; the thin line rectangle with oblique line represents the shifting block 8 with oblique plane. Specifically, the method comprises the following steps: the inclined block 14 of the pulling-out part is firstly contacted with the inclined plane of the shifting block 8, the shifting block 8 is pulled out from the space between the teeth under the action of the inclined plane, the push block 7 is contacted with the shifting block 8 after the bottom height of the shifting block 8 exceeds the inclined plane of the teeth, the push block 7 completely pushes the shifting block 8 out of the space between the teeth under the guiding action of the inclined plane, the inclined block 14 and the shifting block 8 are separated at the moment, and the inclined block 14 is reset under the elastic force action of the spring B; with the rotation of the guide post sleeve 19, the push block 7, the shifting block 8 and the inclined block 14 synchronously rotate, and when the shifting block 8 reaches the next tooth space, under the action of the spring A20, no obstacle exists below the shifting block 8, so that the shifting block enters the tooth space again.

The upper part of the teeth 18 of the gear ring is of a trapezoidal structure, and as long as the shifting block 8 is lifted out and highly contacts with the inclined edge of the trapezoid, the pushing block 7 can push the shifting block 8 under the guidance of the inclined surface.

When the sucker rod 12 is in the up stroke, the disc spring A11 is compressed most, the bearing sleeve 5 moves downwards, in order to make the guide column sleeve 19 move downwards, the disc spring B1 is arranged above the guide column sleeve 19, the spacing ring 3 is arranged between the guide column sleeve 19 and the disc spring, the spacing ring 3 is in clearance fit with the sucker rod 12, a thrust bearing is arranged between the spacing ring 3 and the guide column sleeve 19, in the down stroke moment of the sucker rod 12, the disc spring A11 is compressed most downwards, the bearing sleeve 5 moves upwards, and in order to make the guide column sleeve 19 move upwards, the elastic modulus of the disc spring A11 must be larger than that of the disc spring B1.

As an alternative to the disc spring B1, a spacer ring 3 is disposed above the guide post sleeve 19, a thrust bearing is disposed between the spacer ring 3 and the guide post sleeve 19, and the upper end of the center ring 10 is press-fitted on the spacer ring 3, so that the guide post sleeve 19 and the bearing sleeve 5 move axially in synchronization.

Claims

1. The utility model provides a sucker rod eccentric wear prevention integrated protection device, including casing (4), be provided with direction slide cover (2) and guide post cover (19) in casing (4), direction slide cover (2) are fixed relative casing (4), direction slide cover (2) inner wall has the direction slide, guide post cover (19) outer wall has the guide post, the guide post stretches into in the direction slide, thereby the up-and-down reciprocating motion of guide post cover (19) relative direction slide cover (2) turns into relative rotary motion, its characterized in that: a bearing sleeve (5) is arranged in the shell (4) below the guide column sleeve (19), a thrust bearing is arranged between the bearing sleeve (5) and the guide column sleeve (19), the guide column sleeve (19) and the bearing sleeve (5) are in clearance fit with the sucker rod (12), a positioning sleeve (6) is arranged between the outer side of the bearing sleeve (5) and the shell (4), the positioning sleeve (6) is fixed relative to the shell (4), a linear groove is formed in the vertical direction of the inner wall of the positioning sleeve (6), a guide column is arranged on the outer wall of the bearing sleeve (5), the guide column extends into the linear groove, so that the bearing sleeve (5) generates vertical displacement relative to the positioning sleeve (6), a disc spring A (11) is arranged between the bearing sleeve (5) and the bottom surface of the shell (4), and an intermittent stepping type transmission assembly is arranged between the bearing sleeve (5) and the guide column sleeve (19); the intermittent stepping type transmission assembly comprises a center ring (10), the center ring (10) is fixedly connected with a sucker rod (12), a thrust bearing is arranged between the center ring (10) and a bearing sleeve (5), a shifting block (8) is installed on the center ring (10), the shifting block (8) extends out of the outer edge of the center ring (10) in the horizontal direction, the shifting block (8) is installed on the center ring (10) through at least two vertically arranged long studs (9), a spring A (20) is arranged between the lower end face of the center ring (10) and the studs, under the action of the spring A (20), the shifting block (8) has a tendency of leaning against the center ring (10), a toothed ring is arranged on the inner side of the upper end of the bearing sleeve (5), and a shifting block (8) is contained in a tooth space of the toothed ring, so that the center ring (10) is limited from rotating in two directions, a pushing part used for pushing the shifting block (8) out of a tooth space which is pushed out from the shifting block (8) and used for pushing the shifting block (8) to rotate after being pushed out is fixedly connected to the lower end of the guide column sleeve (19) A block (7); the lifting part comprises an inclined block (14), an installation shaft (16), a connecting rod (13), a sliding sleeve (17) and a spring B (15), the installation shaft (16) is positioned on the inclined block (14), the sliding sleeve is sleeved on the installation shaft (16) in a sliding manner, the lower part of the connecting rod (13) is fixedly connected onto the sliding sleeve, the upper part of the fixing rod is fixedly connected onto a guide column sleeve (19), the spring B (15) is sleeved on the installation shaft (16), and the sliding sleeve has a tendency of being positioned at the uphill part of the inclined block (14) under the action of the spring B (15); one end of the shifting block (8) far away from the gear ring is provided with an inclined surface, and the inclined surface is matched with the inclined block (14) to lift the shifting block (8) out of the teeth.

2. The sucker rod eccentric wear prevention comprehensive protection device of claim 1, which is characterized in that: the upper part of the teeth (18) of the toothed ring is of a trapezoidal structure.

3. The sucker rod eccentric wear prevention comprehensive protection device of claim 1, which is characterized in that: a disc spring B (1) is arranged above the guide column sleeve (19), the elastic modulus of the disc spring B (1) is smaller than that of the disc spring A (11), a spacer ring (3) is arranged between the guide column sleeve (19) and the disc spring, the spacer ring (3) is in clearance fit with the sucker rod (12), and a thrust bearing is arranged between the spacer ring (3) and the guide column sleeve (19).

4. The sucker rod eccentric wear prevention comprehensive protection device of claim 1, which is characterized in that: a spacer ring (3) is arranged above the guide column sleeve (19), a thrust bearing is arranged between the spacer ring (3) and the guide column sleeve (19), and the upper end of the central ring (10) is pressed on the spacer ring (3).