阅读说明：本技术 伸缩机构及抽油杆起放装置 (Telescopic mechanism and sucker rod lifting and releasing device ) 是由 李培江 刘波 张利欣 王凯琦 董净净 于 2019-12-18 设计创作，主要内容包括：本发明提供一种伸缩机构及抽油杆起放装置,用于解决现有技术中抽油杆起放装置举升不同步以及油缸漏油的问题。本发明提供一种伸缩机构,包括：底座,驱动机构,驱动机构安装所述底座上；外筒、中筒和内筒,外筒固定在所述底座上,所述内筒能够轴向直线运动且所述内筒的转动位移被限制,内筒外侧设有外螺纹,中筒外壁上均设有外螺纹,所述驱动机构能够在所述中筒轴向伸缩过程中持续驱动所述中筒转动；所述外筒内固套有第一驱动套,第一驱动套内侧设有内螺纹,第一驱动套的内螺纹和中筒的外螺纹匹配；中筒内固套有第二驱动套,第二驱动套内侧设有内螺纹,第二驱动套的内螺纹和内筒的外螺纹匹配,第二驱动套的内螺纹和中筒的外螺纹旋向相反。(The invention provides a telescopic mechanism and a sucker rod lifting device, which are used for solving the problems of asynchronous lifting of the sucker rod lifting device and oil leakage of an oil cylinder in the prior art. The present invention provides a telescopic mechanism, comprising: the driving mechanism is arranged on the base; the outer cylinder is fixed on the base, the inner cylinder can axially and linearly move, the rotary displacement of the inner cylinder is limited, external threads are arranged on the outer side of the inner cylinder, the outer wall of the middle cylinder is provided with the external threads, and the driving mechanism can continuously drive the middle cylinder to rotate in the axial telescopic process of the middle cylinder; a first driving sleeve is fixedly sleeved in the outer cylinder, an internal thread is arranged on the inner side of the first driving sleeve, and the internal thread of the first driving sleeve is matched with the external thread of the middle cylinder; a second driving sleeve is fixedly sleeved in the middle barrel, an internal thread is arranged on the inner side of the second driving sleeve, the internal thread of the second driving sleeve is matched with the external thread of the inner barrel, and the rotating directions of the internal thread of the second driving sleeve and the external thread of the middle barrel are opposite.)

1. A telescopic mechanism, comprising:

a base seat is arranged on the base seat,

the driving mechanism is arranged on the base;

the inner cylinder is sleeved in the middle cylinder, the middle cylinder is sleeved in the outer cylinder, the outer cylinder is fixed on the base, the inner cylinder can axially move linearly, the rotation displacement of the inner cylinder is limited, external threads are arranged on the outer side of the inner cylinder, external threads are arranged on the outer wall of the middle cylinder, and the driving mechanism can continuously drive the middle cylinder to rotate in the axial displacement change process of the middle cylinder;

a first driving sleeve is fixedly sleeved in the outer cylinder, an internal thread is arranged on the inner side of the first driving sleeve, and the internal thread of the first driving sleeve is matched with the external thread of the middle cylinder;

the inner side of the second driving sleeve is provided with an internal thread, the internal thread of the second driving sleeve is matched with the external thread of the inner barrel, and the rotating directions of the internal thread of the second driving sleeve and the external thread of the middle barrel are opposite.

2. The telescoping mechanism of claim 1, wherein: actuating mechanism includes driving piece, drive rod post and third drive cover, the driving piece is installed on the base, the drive rod post activity penetrates the inner tube just the biggest external diameter of drive rod post is less than the internal diameter of inner tube, the third drive cover is overlapped through spline fit on the drive rod post, the third drive cover with well section of thick bamboo is fixed, the driving piece can drive the drive rod post rotates.

3. The telescoping mechanism of claim 2, wherein: the driving mechanism comprises a transmission set, and the driving piece transmits power to the driving rod column through the transmission set.

4. The telescoping mechanism of claim 3, wherein: the transmission set is in transmission through gears.

5. The telescoping mechanism of claim 2, wherein: the drive comprises a hydraulic motor.

6. The telescopic mechanism according to any one of claims 1 to 5, wherein: the first driving sleeve is fixed at one end, far away from the base, of the outer barrel, and the second driving sleeve is fixed at one end, far away from the base, of the middle barrel.

7. The utility model provides a sucker rod plays and puts device which characterized in that: comprising at least two telescopic mechanisms according to any of claims 1 to 6;

still include horizontal seat and leading wheel, each the inner tube is kept away from the one end of base is with same horizontal seat is fixed, the leading wheel is installed on the horizontal seat, the leading wheel be used for with the cooperation of sucker rod.

8. The sucker rod tripping device of claim 7, wherein: the sucker rod lifting and releasing device is installed on the movable platform or the fixed platform.

9. The sucker rod tripping device of claim 7, wherein: each telescopic machanism's actuating mechanism all includes hydraulic motor, each hydraulic motor shares a hydraulic pressure hydraulic fluid port.

10. The sucker rod tripping device of claim 9, wherein: the telescopic mechanism has two, two telescopic mechanism's hydraulic motor sharing one the hydraulic pressure hydraulic fluid port.

Technical Field

The invention relates to the field of petroleum equipment, in particular to a telescopic mechanism and a sucker rod lifting and releasing device.

Background

In the field of well drilling oil, a sucker rod is used as a slender rod piece used in the operation of an oil pumping well and is usually placed underground for operation, the upper end of the sucker rod is connected with a polished rod, and the lower end of the sucker rod is connected with an oil well pump, so that the sucker rod plays a role in transmitting power. The sucker rod mainly adopts carbon fiber sucker rod, and carbon fiber sucker rod is a flexible sucker rod, has performances such as no coupling, light, high strength, high temperature resistant, corrosion-resistant, adopts carbon fiber sucker rod to replace ordinary steel sucker rod in the pumping well, can reduce oil recovery energy consumption by a wide margin.

Carbon fiber sucker rod operation car can realize the operation down of playing of carbon fiber sucker rod and polished rod, what its sucker rod plays the device and adopts is that the multi-stage cylinder structure lifts, because this structure is that both sides single-action multi-stage cylinder lifts the device simultaneously, there is multi-stage cylinder asynchronous at the lift in-process, the problem such as multi-stage cylinder oil leak, in the actual operation in-process, need to play the device and adjust the limit to the sucker rod and lift simultaneously and realize synchronous, waste time and energy, the oil cylinder oil leak leads to equipment maintenance frequency to increase, consume the cost.

Disclosure of Invention

In view of the above-mentioned shortcomings in the prior art, the present invention provides a telescopic mechanism and a sucker rod lifting device, which are used to solve the problems of asynchronous lifting of the sucker rod lifting device and oil leakage of the oil cylinder in the prior art.

To achieve the above and other related objects, the present invention provides a telescopic mechanism, comprising:

a base seat is arranged on the base seat,

the driving mechanism is arranged on the base;

the inner cylinder is sleeved in the middle cylinder, the middle cylinder is sleeved in the outer cylinder, the outer cylinder is fixed on the base, the inner cylinder can axially move linearly, the rotation displacement of the inner cylinder is limited, external threads are arranged on the outer side of the inner cylinder, external threads are arranged on the outer wall of the middle cylinder, and the driving mechanism can continuously drive the middle cylinder to rotate in the axial displacement change process of the middle cylinder;

a first driving sleeve is fixedly sleeved in the outer cylinder, an internal thread is arranged on the inner side of the first driving sleeve, and the internal thread of the first driving sleeve is matched with the external thread of the middle cylinder;

the inner side of the second driving sleeve is provided with an internal thread, the internal thread of the second driving sleeve is matched with the external thread of the inner barrel, and the rotating directions of the internal thread of the second driving sleeve and the external thread of the middle barrel are opposite.

Optionally, actuating mechanism includes driving piece, drive post and third drive cover, the driving piece is installed on the base, the activity of drive post penetrates the inner tube just the maximum external diameter of drive post is less than the internal diameter of inner tube, the third drive cover is in through spline fit cover on the drive post, the third drive cover with well section of thick bamboo is fixed, the driving piece can drive the drive post rotates.

Optionally, the driving mechanism includes a transmission set, and the driving member transmits power to the driving rod column through the transmission set.

Optionally, the transmission set is driven by gears.

Optionally, the drive comprises a hydraulic motor.

Optionally, the first driving sleeve is fixed to one end, far away from the base, of the outer cylinder, and the second driving sleeve is fixed to one end, far away from the base, of the middle cylinder.

The sucker rod lifting and releasing device at least comprises two telescopic mechanisms;

still include horizontal seat and leading wheel, each the inner tube is kept away from the one end of base is with same horizontal seat is fixed, the leading wheel is installed on the horizontal seat, the leading wheel be used for with the cooperation of sucker rod.

Optionally, the sucker rod lifting and lowering device is mounted on the movable platform or the fixed platform.

Optionally, each driving mechanism of the telescopic mechanism includes a hydraulic motor, and each hydraulic motor shares a hydraulic oil port.

Optionally, the number of the telescopic mechanisms is two, and the hydraulic motors of the two telescopic mechanisms share one hydraulic oil port.

As mentioned above, the telescopic mechanism and the sucker rod lifting and releasing device of the invention at least have the following beneficial effects:

through well section of thick bamboo respectively with the cooperation of the positive and negative screw thread of urceolus and inner tube, and the urceolus is fixed, the rotary displacement of inner tube is injectd and can axial motion, make well section of thick bamboo can take place axial displacement under the pivoted state, the inner tube can be by well section of thick bamboo drive axial rectilinear motion, thereby realize multistage synchronous flexible, and through screw drive, it has higher precision, especially when playing the putting device as the sucker rod, a plurality of telescopic machanism can keep higher synchronism, effectively solve the problem of sucker rod play device lift desynchronized and hydro-cylinder oil leak among the prior art.

Drawings

FIG. 1 is a schematic view of the sucker rod lifting and releasing device of the present invention.

Fig. 2 is a schematic view in the direction of a-a in fig. 1.

Fig. 3 is a partially enlarged view of a in fig. 1.

Fig. 4 is a partially enlarged schematic view of B in fig. 1.

Element number description: the driving mechanism comprises a base 1, a driving mechanism 2, an outer cylinder 3, a middle cylinder 4, an inner cylinder 5, a first driving sleeve 31, a second driving sleeve 41, a driving piece 21, a driving rod column 22, a third driving sleeve 23, a transmission group 24, a driving gear 241, a driven gear 242, a transverse seat 6 and a guide wheel 7.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood by referring to fig. 1-4 that the structures, ratios, sizes, etc. shown in the drawings are only used for understanding and reading the disclosure, and are not used to limit the practical limitations of the present invention, so they have no technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes should fall within the scope of the present invention without affecting the function and the achievable object of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.

Referring to fig. 1, 3 and 4, an embodiment of a telescopic mechanism according to the present invention includes: the device comprises a base 1, a driving mechanism 2, an outer cylinder 3, a middle cylinder 4 and an inner cylinder 5, wherein the driving mechanism 2 is installed on the base 1; the inner cylinder 5 is sleeved in the middle cylinder 4, the middle cylinder 4 is sleeved in the outer cylinder 3, the outer cylinder 3 is fixed on the base 1, the inner cylinders 5 can axially and linearly move and the rotational displacement of the inner cylinders 5 is limited, the rotational displacement of the inner cylinders 5 can be limited through an external structure, for example, two inner cylinders 5 are fixed on a transverse seat mentioned in the following embodiment, the rotational displacement between the two inner cylinders 5 is limited, of course, the rotational displacement can be limited in other forms, for example, a supported product can only axially and linearly move, external threads are arranged on the outer side of the inner cylinders 5, external threads are arranged on the outer wall of the middle cylinder 4, and the driving mechanism 2 can continuously drive the middle cylinder 4 to rotate in the axial displacement process of the middle cylinder 4; a first driving sleeve 31 is fixedly sleeved in the outer barrel 3, inner threads are arranged on the inner side of the first driving sleeve 31, and the inner threads of the first driving sleeve 31 are matched with the outer threads of the middle barrel 4; a second driving sleeve 41 is fixedly sleeved in the middle barrel 4, inner threads are arranged on the inner side of the second driving sleeve 41, the inner threads of the second driving sleeve 41 are matched with the outer threads of the inner barrel 5, and the rotating directions of the inner threads of the second driving sleeve 41 and the outer threads of the middle barrel 4 are opposite.

When the multi-stage telescopic oil cylinder is used, the driving mechanism 2 drives the middle cylinder 4 to continuously rotate, the outer side of the middle cylinder 4 is connected with the inner side of the first driving sleeve 31 fixed on the outer cylinder 3 through threads, the outer cylinder 3 is fixed with the base 1, so that the outer cylinder 3 does not axially displace, the middle cylinder 4 axially displaces while rotating, the inner side of the second driving sleeve 41 fixed on the middle cylinder 4 is matched with the inner cylinder 5 through threads, and the rotational displacement of the inner cylinder 5 is limited, so that the inner cylinder 5 is driven by the middle cylinder 4 in the rotating and axial displacement process of the middle cylinder 4, the rotational displacement of the inner cylinder 5 is limited, so that the inner cylinder 5 can only axially move linearly (the transmission relationship between the inner cylinder 5 and the middle cylinder 4 is similar to that of a screw rod sliding table mechanism), multi-stage telescopic is realized, and compared with the existing multi-stage oil cylinder scheme, the multi-stage telescopic oil cylinder can.

Referring to fig. 1 to 4, an embodiment of the driving mechanism 2 includes a driving member 21, a driving rod 22 and a third driving sleeve 23, wherein the driving member 21 is mounted on the base 1; in order to avoid interference between the driving rod post 22 and the inner cylinder 5, the driving rod post 22 movably penetrates into the inner cylinder 5 and the maximum outer diameter of the driving rod post 22 is smaller than the inner diameter of the inner cylinder 5; the third driving sleeve 23 is sleeved on the driving rod column 22 through spline fit, the third driving sleeve 23 and the middle barrel 4 are fixed, and the driving piece 21 can drive the driving rod column 22 to rotate. The spline fit can effectively drive the third driving sleeve 23 to rotate, meanwhile, the axial movement of the third driving sleeve 23 on the driving rod column 22 is not influenced, and the third driving sleeve 23 and the middle barrel 4 can be fixed by welding. The third driving sleeve 23 can move axially along with the middle cylinder 4, and the third driving sleeve 23 is positioned at the lower end of the middle cylinder 4 in fig. 1 and can effectively adapt to the telescopic length of the middle cylinder 4.

Referring to fig. 1, 3 and 4, an embodiment of the driving mechanism 2 may further include a transmission set 24, and the driving member 21 transmits power to the driving rod 22 through the transmission set 24. Alternatively, the transmission set 24 is driven by gears. The transmission set 24 can effectively change the rotating speed and can change the arrangement position of the driving member 21, the transmission set 24 is driven by gears, and the transmission is more stable and reliable, in fig. 1, the driving gear 241 and the driven gear 242 are included, and the driving gear 241 and the driven gear 242 are meshed.

Referring to fig. 1, 3 and 4, the driving member 21 may be a hydraulic motor. The hydraulic motor drives the telescopic mechanism, and the bearing capacity of the telescopic mechanism is improved.

Referring to fig. 1, 3 and 4, in another embodiment of the driving mechanism 2, the first driving sleeve 31 is fixed at an end of the outer cylinder 3 away from the base 1, and the second driving sleeve 41 is fixed at an end of the middle cylinder 4 away from the base 1. The first driving sleeve 31 and the second driving sleeve 41 are arranged to enable the middle barrel 4 and the inner barrel 5 to extend and contract for a longer distance.

Referring to fig. 1, 3 and 4, an embodiment of a sucker rod lifting and releasing device at least includes two or more telescopic mechanisms according to any of the embodiments; the inner cylinder fixing device further comprises a transverse seat 6 and guide wheels 7, one end of each inner cylinder 5, which is far away from the base 1, is fixed with the same transverse seat 6, the inner cylinders 5 and the transverse seats 6 can be fixed by welding or by structural matching such as pin shafts or bolts, and the like, and the fixing is not limited; the guide wheel 7 is installed on the transverse seat 6, and the guide wheel 7 is used for being matched with the sucker rod. Horizontal seat 6 is fixed with each inner tube 5 for the rotary displacement of inner tube 5 is restricted by horizontal seat 6, and leading wheel 7 is fixed on horizontal seat 6, and when horizontal seat 6 was by the jacking, leading wheel 7 also rose in step, and leading wheel 7 is walked around to the sucker rod, and leading wheel 7 rises and descends and realizes playing and putting the sucker rod.

In this embodiment, the sucker rod lifting and lowering device is mounted on a movable platform or a fixed platform. The lifting device can be arranged on a vehicle or at a fixed position, and can be selected according to requirements.

In this embodiment, the driving mechanism 2 of each telescopic mechanism includes a hydraulic motor, and each hydraulic motor shares a hydraulic oil port. Optionally, the number of the telescopic mechanisms is two, and the hydraulic motors of the two telescopic mechanisms share one hydraulic oil port. A hydraulic pressure hydraulic fluid port of sharing for each hydraulic motor can synchronous drive, and when telescopic machanism had two, hydraulic motor was only two, and it can guarantee that driven power is enough, has guaranteed the synchronism again simultaneously.

In conclusion, the middle cylinder 4 is respectively matched with the positive and negative threads of the outer cylinder 3 and the inner cylinder 5, the outer cylinder 3 is fixed, the rotary displacement of the inner cylinder 5 is limited, so that the middle cylinder 4 can extend and retract in a rotary state, the inner cylinder 5 can be driven by the middle cylinder 4 to axially and linearly extend and retract, multi-stage synchronous extension and retraction are achieved, high precision is achieved through thread transmission, particularly when the telescopic mechanism is used as a sucker rod lifting and releasing device, high synchronism can be kept through a plurality of telescopic mechanisms, and the problems that the sucker rod lifting and releasing device is asynchronous in lifting and oil leakage of an oil cylinder in the prior art are effectively solved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.