阅读说明：本技术 抽油杆吊卡 (Sucker rod elevator ) 是由 孙连会 王铁峰 黄树 葛东文 秦虹 杨振涛 陈辉 李纬 马靖国 杨安平 孙连治 于 2020-11-26 设计创作，主要内容包括：本申请实施例公开了一种抽油杆吊卡,属于石油工程设备技术领域。该抽油杆吊卡包括：基台体、杆卡总成、齿动环、限距齿轮、马达、防护罩和动控系统。杆卡总成位于基台体的中心位置,齿动环围绕杆卡总成旋转。马达被防护罩固定在基台体开口方向相反的一侧,限距齿轮安装在马达的驱动轴上,限距齿轮的齿轮部分与齿动环的齿轮部分啮合。防护罩与基台体相连,包围限距齿轮和马达。动控系统与马达相连,用于控制马达工作。该抽油杆吊卡通过马达驱动杆卡总成,实现了抽油杆吊卡的自动挂摘,提高了操作效率,降低了安全风险。(The embodiment of the application discloses a sucker rod elevator belongs to petroleum engineering equipment technical field. This sucker rod elevator includes: the base platform body, pole card assembly, tooth rotating ring, range limiting gear, motor, protection casing and power control system. The rod clamp assembly is located at the center of the base table body, and the toothed movable ring rotates around the rod clamp assembly. The motor is fixed on the opposite side of the opening direction of the base body by the protective cover, the distance limiting gear is arranged on a driving shaft of the motor, and a gear part of the distance limiting gear is meshed with a gear part of the gear moving ring. The protective cover is connected with the base table body and surrounds the distance limiting gear and the motor. The power control system is connected with the motor and used for controlling the motor to work. This sucker rod elevator passes through motor drive pole card assembly, has realized the automation of sucker rod elevator and has hung the plucking, has improved operating efficiency, has reduced the safety risk.)

1. The sucker rod elevator is characterized by comprising a base platform body (1), a rod elevator assembly (2), a tooth moving ring (3), a distance limiting gear (4), a motor (5), a protective cover (6) and a power control system (7);

wherein, the middle of the base table body (1) is an annular structure with an opening at one side; the rod clamp assembly (2) is positioned in the center of the base table body (1); the toothed rotating ring (3) rotates around the rod clamp assembly (2); the distance limiting gear (4) is connected with a driving shaft of the motor (5); the motor (5) is fixed on one side of the middle annular structure of the base table body (1) opposite to the opening direction by the protective cover (6) and is connected with the power control system (7);

the gear part of the pitch limiting gear (4) is meshed with the gear part of the gear moving ring (3);

the protective cover (6) is connected with the base table body (1) and surrounds the distance limiting gear (4) and the motor (5).

2. The sucker rod elevator of claim 1, wherein the base block (1) comprises a tube receiving hole (11), a lifting ring shoulder hole set (12), and a ring groove (13);

the lifting ring shoulder hole groups (12) are positioned on two sides of the ring groove (13); the pipe containing hole (11) is positioned at the circle center of the ring groove (13).

3. The sucker rod elevator of claim 1, wherein the rod clamp assembly (2) comprises a boss portion (21), a rod receiving hole (22), a counter sink (23), a push rod member (24), a positioning hook set (25), a cavity portion (26), a return elastic member (27), a positioning pin (28), and a lead-in set (29);

the rod holding hole (22) is of a tubular structure with an opening on the side surface; the boss body (21) is positioned at the top of the rod containing hole (22); the countersunk head groove (23) is positioned on the upper surface of the boss body (21); the concave cavity part (26) is positioned below the boss body (21), and the pipe wall of one side of the opening of the rod containing hole (22); the push rod piece (24) is in a block shape, one end of the push rod piece (24) is positioned in the cavity part (26), and the other end of the push rod piece (24) is not positioned in the cavity part (26); the return elastic part (27) is positioned in the cavity part (26) and is connected with the push rod part (24); the positioning pin (28) penetrates through the boss part (21), the push rod part (24), the return elastic part (27) and the cavity part (26); the lead-in group (29) is connected with the opening of the rod containing hole (22); the positioning hook groups (25) are symmetrically distributed along the outer edge of the boss part (21).

4. The sucker rod elevator of claim 1, wherein the power control system (7) comprises an electro-hydraulic valve (71), a set of transfer lines (72), a set of power supply lines (73), a set of wires (74), and a selective switch (75);

the output end of the electro-hydraulic valve (71) is connected with the motor (5) through the transmission pipeline group (72); the input end of the electro-hydraulic valve (71) is connected with a power mechanism through the energy supply pipeline set (73); the electro-hydraulic valve (71) is connected with the selective control switch (75) through the lead group (74).

5. The sucker rod elevator of any one of claims 1 to 4, wherein the toothed ring (3) is an outer wall rack ring.

6. The sucker rod elevator of any one of claims 1 to 4, wherein the length of the gear portion at the outer edge of the toothed rotating ring (3) is one half of the arc length of the outer edge of the toothed rotating ring (3).

7. The sucker rod elevator of any one of claims 1 to 4, wherein the gear portion of the outer rim of the toothed ring (3) is formed with a spur gear.

8. The sucker rod elevator of any one of claims 1 to 4, wherein the pitch gear (4) is a sector gear.

9. The sucker rod elevator of claim 4, wherein the selective switch (75) uses a DC safety voltage.

10. The sucker rod elevator of any one of claims 1-4, wherein the toothed ring (3) performs a limited circular motion around the rod block assembly (2).

Technical Field

The embodiment of the application relates to the technical field of petroleum engineering equipment, in particular to a sucker rod elevator.

Background

In the downhole operation of the domestic petroleum system, a large amount of sucker rod lifting construction exists, and generally comprises a series of work of manually hanging and picking an elevator, pushing and pulling a screw thread hydraulic clamp, retracting and delivering a sucker rod and the like. The sucker rod elevator is key equipment in the construction of lifting and lowering the sucker rod, and is connected with lifting equipment in a rope hook mode, a lifting ring mode and the like to form a lifting system.

The elevator of the sucker rod is self-locking type with a reed and is internally provided with a torsional spring, a front tongue and a rear tongue. In the process of manually hanging and picking the elevator, when the sucker rod needs to be clamped, the rear tongue is manually pressed, and after the rear tongue drives the front tongue to move in place through the torsion spring, the rear tongue is self-locked; when the sucker rod needs to be released, the rear tongue is manually pressed, the self-locking of the rear tongue is released, and the rear tongue drives the front tongue to reset through the torsion spring.

In the implementation process of the present application, the inventors found that the related art has at least the following problems:

the manual hanging and picking elevator has low operation efficiency and has safety risk during wellhead operation.

Disclosure of Invention

In view of this, the embodiment of the present application provides a sucker rod elevator, can overcome the problem that there is the safety risk and operating efficiency is low in the manual hanging of elevator of plucking, technical scheme is as follows:

the embodiment of the application provides a sucker rod elevator, which comprises a base platform body, a rod elevator assembly, a tooth moving ring, a pitch limiting gear, a motor, a protective cover and a power control system, wherein the tooth moving ring is arranged on the base platform body;

wherein, the middle of the base platform body is an annular structure with an opening at one side; the rod clamp assembly is positioned in the center of the base platform body; the toothed movable ring rotates around the rod clamp assembly; the distance limiting gear is connected with a driving shaft of the motor; the motor is fixed on one side of the middle annular structure of the base station body, which is opposite to the opening direction, by the protective cover and is connected with the power control system;

the gear part of the pitch limiting gear is meshed with the gear part of the gear moving ring;

the protective cover is connected with the base table body and surrounds the distance limiting gear and the motor.

Optionally, the base body comprises a pipe containing hole, a lifting ring shoulder hole group and a ring groove;

the lifting ring shoulder hole groups are positioned on two sides of the ring groove; the tube containing hole is positioned at the circle center of the ring groove.

Optionally, the rod clamp assembly comprises a boss part, a rod accommodating hole, a countersunk groove, a push rod part, a positioning hook group, a cavity part, a reset elastic part, a positioning pin and a lead-in group;

the rod accommodating hole is of a tubular structure with an opening on the side surface; the boss body is positioned at the top of the rod accommodating hole; the countersunk groove is positioned on the upper surface of the boss body; the concave cavity part is positioned on the pipe wall at one side of the opening of the pipe containing hole below the boss body; the push rod piece is in a block shape, one end of the push rod piece is positioned in the concave cavity part, and the other end of the push rod piece is not positioned in the concave cavity part; the reset elastic part is positioned in the cavity part and connected with the push rod part; the positioning pin penetrates through the boss part, the push rod part, the reset elastic part and the cavity part; the leading-in group is connected with the opening of the rod containing hole; the positioning hook groups are symmetrically distributed along the outer edge of the boss part.

Optionally, the power control system comprises an electro-hydraulic valve, a transmission pipeline set, an energy supply pipeline set, a lead set and a selective control switch;

the output end of the electro-hydraulic valve is connected with the motor through the transmission pipeline group; the input end of the electro-hydraulic valve is connected with a power mechanism through the energy supply pipeline set; the electro-hydraulic valve is connected with the selective control switch through the lead group.

Optionally, the toothed rotating ring is an outer wall rack ring.

Optionally, the length of the gear portion at the outer edge of the toothed rotating ring is half of the arc length of the outer edge of the toothed rotating ring.

Optionally, the tooth shape of the gear part at the outer edge of the toothed rotating ring is a spur gear.

Optionally, the pitch gear is a sector gear.

Optionally, the selective control switch uses a direct current safety voltage.

Optionally, the toothed ring performs a limited circular motion around the rod card assembly.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

the embodiment of the application provides an oil pumping rod elevator for realizing the automatic operation of hanging and picking the elevator by an oil pumping rod. The sucker rod elevator drives the gear movable ring to push the push rod piece through the motor forward driving distance limiting gear, so that the sucker rod elevator can effectively clamp the sucker rod body; this sucker rod elevator drives the tooth rotating ring through motor back drive limit for distance gear and removes the restriction to the push rod piece, utilizes the elastic component that resets to drive the push rod piece and resets, has realized the quick release of sucker rod elevator to the sucker rod elevator. The sucker rod elevator that this application embodiment provided has improved operating efficiency, and has avoided the safety risk that personnel exist at the well head operation, has improved the security.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the embodiments of the present application will be described below.

FIG. 1 is a top view of a schematic structural diagram of a sucker rod elevator provided in an embodiment of the present application;

FIG. 2 is a front view of a schematic structural diagram of a sucker rod elevator provided in an embodiment of the present application;

FIG. 3 is a front view of a schematic structural diagram of a pole clamp assembly provided by an embodiment of the present application;

FIG. 4 is a top view of a schematic structural diagram of a pole clamp assembly provided in an embodiment of the present application;

fig. 5 is a schematic structural view of a pusher member according to an embodiment of the present disclosure.

Wherein the reference numerals denote:

1-a base body;

11-tube-containing hole;

12-a hanging ring shoulder hole group;

13-ring groove;

2-rod clamp assembly;

21-a boss portion;

22-rod containing holes;

23-countersunk groove;

24-a pusher member;

25-positioning hook group;

26-a cavity part;

27-a return spring;

28-positioning pin;

29-introduction group;

3, a toothed moving ring;

4-pitch limited gear;

5-a motor;

6, a protective cover;

7-a power control system;

71-electro-hydraulic valve;

72-group of transfer lines;

73-energy supply line group;

74-wire set;

and 75, selecting and controlling a switch.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following describes the embodiments of the present application with reference to the accompanying drawings. The drawings may be regarded as a block diagram of embodiments of the invention.

As shown in FIG. 1, the embodiment of the application provides a sucker rod elevator, which comprises a base platform body 1, a rod clamp assembly 2, a tooth moving ring 3, a pitch limiting gear 4, a motor 5, a protective cover 6 and a power control system 7.

Wherein, the middle of the base table body 1 is an annular structure with one side opened; the rod clamp assembly 2 is positioned in the pipe containing hole 11 in the middle of the base table body 1; the gear moving ring 3 is positioned in the ring groove 13 of the base table body 1;

the distance limiting gear 4 is connected with a driving shaft of a motor 5; the motor 5 is fixed on one side of the middle annular structure of the base table body 1 opposite to the opening direction by a protective cover 6 and is connected with a power control system 7; the gear part of the pitch limiting gear 4 is meshed with the gear part of the gear moving ring 3 at the opposite side of the opening direction of the annular structure of the base body 1; the shield 6 is connected to the base 1 and surrounds the pitch gear 4 and the motor 5.

The base body 1 is used for accommodating the rod card assembly 2 and is integrated into a lifting system.

The toothed rotating ring 3 is used for pushing the push rod piece 24 to move and limiting the position of the push rod piece 24.

The pitch limiting gear 4 is used for driving the gear rotating ring 3 to rotate in the ring groove 13 in a limited way.

The motor 5 is used for driving the pitch limiting gear 4 to rotate.

The guard 6 is used to protect the pitch gear 4 and the stationary motor 5.

The power control system 7 is connected with the motor 5 and is used for controlling the operation of the motor 5.

In an alternative embodiment, as shown in fig. 1 and 2, the abutment body 1 includes a tube receiving hole 11, a ring shoulder hole group 12, and a ring groove 13. The lifting ring shoulder hole group 12 is positioned at two sides of the ring groove 13; the vessel aperture 11 is located at the center of the ring groove 13.

In an alternative embodiment, as shown in fig. 3, the lever card assembly 2 includes a boss portion 21, a lever receiving hole 22, a countersunk groove 23, a pusher member 24, a positioning hook group 25, a cavity portion 26, a return elastic member 27, a positioning pin 28, and a lead-in group 29.

As shown in FIG. 3, the rod-receiving hole 22 is a tubular structure with an opening on the side, and has an outward gap for receiving the body below the top end of the sucker rod; the boss body 21 is positioned at the top of the rod containing hole 22 and is used for hanging the rod clamp assembly 2 at the top of the rod containing hole 11 so as not to slide along the axial direction of the rod containing hole 11; the countersunk groove 23 is located at the top of the convex body 21 for seating the convex body at the lower part of the top end of the sucker rod, thereby realizing the stabilization of the sucker rod body.

The lead-in group 29 is connected with the opening of the rod containing hole 22 to form a trumpet-shaped inlet, the inner wall of the trumpet-shaped inlet is smoothly transited with the inner wall of the opening of the rod containing hole 22 to form a trumpet-shaped opening, and the trumpet-shaped opening is used for guiding the body below the top end of the sucker rod into the rod containing hole 22.

As shown in FIG. 3, the cavity 26 is located below the boss body 21 and on the wall of the tube on the side where the rod-receiving hole 22 opens. The push rod piece 24 is block-shaped and has a hole at one end, the hole end of the push rod piece 24 is positioned in the cavity part 26, the other end of the push rod piece 24 is not positioned in the cavity part 26 and can rotate limitedly around the positioning pin 28 for pushing the sucker rod body to close to the center of the rod containing hole 22. The return elastic member 27 is located inside the cavity portion 26, is connected to the pusher member 24, and can rotate limitedly around the positioning pin 28, and elastically drives the pusher member 24 to return to the initial position by itself.

The positioning hook sets 25 are symmetrically distributed along the outer edge of the boss portion 21.

Illustratively, as shown in FIG. 5, the pusher member 24 is block-shaped with a cylindrical bore at one end and located within the pocket 26. Two sides of the pusher member 24 are orthogonal planes and the other side of the pusher member 24 connects the ends of the two orthogonal planes.

Illustratively, as shown in fig. 1, the pusher member 24 has a width that does not exceed the width of the pocket portion 26. When the push rod piece 24 is not in operation, one of the side planes coincides with the plane at the notch of the rod containing hole 22.

Illustratively, as shown in fig. 4, the 4 positioning hooks of the positioning hook set 25 are symmetrically distributed along the outer edge of the boss portion 21 for limiting the lateral displacement of the lever card assembly 2.

As shown in fig. 1, the rod clamp assembly 2 is installed in the tube receiving hole 11 of the base body 1. The lead-in group 29 of the rod clamp assembly 2 protrudes outside the opening of the tube receiving hole 11. The positioning hook group 25 of the rod clamp assembly 2 is hooked on the outer wall of the base platform body 1.

The toothed rotating ring 3 is mounted in a ring groove 13 on the surface of the base body 1 and can perform limited circular motion around the rod clamp assembly 2.

The toothed moving ring 3 is illustratively an outer wall rack ring. The length of the gear part at the outer edge of the gear moving ring 3 accounts for one half of the arc length of the outer edge of the gear moving ring 3, and the tooth form is a straight gear.

The tooth profile of the pitch limiting gear 4 is the same as that of the gear part of the toothed movable ring 3.

The motor 5 is fixed on the opposite side of the opening direction of the middle ring structure of the base table body 1 by a protective cover 6. The pitch gear 4 is mounted on the drive shaft of the motor 5. The gear portion of the pitch gear 4 meshes with the gear portion of the gear ring 3 at the groove on the surface of the base body 1 on the opposite side of the annular structure opening direction.

Illustratively, when the motor 5 rotates in the forward direction, the pitch gear 4 is driven to rotate in the forward direction and the toothed ring 3 is driven to rotate in the forward direction. When the ring gear 3 rotates in the forward direction, one end of the ring gear 3 pushes the pusher member 24 to rotate about the positioning pin 28. The push rod piece 24 is pushed by the toothed ring 3 and rotates to a position of completely blocking the gap of the rod containing hole 22. When the rod accommodating hole 22 is blocked by the push rod piece 24, the motor 5 stops driving the distance limiting gear 4, and the tooth moving ring 3 props against the push rod piece 24, so that the sucker rod body is locked.

Illustratively, when the motor 5 rotates in reverse, the drive pitch gear 4 rotates in reverse and drives the toothed ring 3 to rotate in reverse. The tooth moving ring 3 of the locking push rod piece 24 rotates reversely, and one end of the tooth moving ring 3 releases the locking of the push rod piece 24. The push rod member 24 rotates around the positioning pin 28 under the action of the return elastic member 27 to return to the initial position, and the sucker rod body is unlocked.

The shield 6 is connected to the base 1, and surrounds the pitch gear 4 and the motor 5 to protect the pitch gear 4 and the motor 5.

The pitch gear 4 is illustratively a sector gear.

In an alternative embodiment, as shown in FIG. 1, the control system 7 includes an electro-hydraulic valve 71, a set of transfer lines 72, a set of power supply lines 73, a set of wires 74, and a selective switch 75. Wherein, the output end of the electro-hydraulic valve 71 is connected with the motor 5 through the transmission line group 72; the input end of the electro-hydraulic valve 71 is connected with the power mechanism through an energy supply pipeline set 73; the electro-hydraulic valve 71 is connected to a selection switch 75 by a set of leads 74.

The electro-hydraulic valve 71 includes a plurality of valves for controlling the communication of the set of transfer lines 72 in the control system 7 and the direction of transfer of the pressurized medium in the set of transfer lines 72.

The line set 72 is used for feeding the medium under pressure to the motor 5.

The power supply line set 73 is used for connecting the power mechanism.

The selective switch 75 is used for controlling the opening and closing of different valves in the electro-hydraulic valve 71 through a lead group 74 so as to control the output direction of the medium under pressure.

The electrohydraulic valve 71 receives a pressurized medium supplied by the drive unit via a supply line set 73 and supplies the pressurized medium to the motor 5 via a supply line set 72.

The selection switch 75 is illustratively powered by the vehicle battery of the workover rig using a dc safety voltage. The selective switch 75 selectively supplies power to the electrohydraulic valve 71 through the lead group 74.

Illustratively, the power mechanism is a hydraulic system of a workover rig.

The working state of the sucker rod elevator is divided into two different working states of hanging and picking. "hanging" means adding sucker rod elevator to the body below the top of sucker rod; "picking" means removing the sucker rod elevator from the body below the top end of the sucker rod.

Exemplarily, the sucker rod elevator needs to be hung and picked up when the sucker rod is lifted up, and the operation process of hanging and picking the sucker rod elevator is as follows:

the preparation work is completed, including the use of a lifting ring or a cable hook to enable the sucker rod elevator to be integrated into the lifting system through the lifting ring shoulder hole group 12 of the base platform body 1, the upstream of a selective control switch 75 to be connected with an on-board storage battery of the workover rig, and the upstream of an electro-hydraulic valve 71 to be connected with a hydraulic system of the workover rig. After the sucker rod body is pre-lifted out of the well to expose a certain height, the sucker rod body is fixed by fixed clamping equipment of a well head.

The sucker rod elevator is moved to align the gap of the rod receiving hole 22 with the exposed body of the sucker rod, and then moved close to the exposed body of the sucker rod to enter the gap of the rod receiving hole 22 under the guidance of the lead-in group 29.

The selection switch 75 is operated to forward current to the electro-hydraulic valve 71 via the set of conductors 74, and the electro-hydraulic valve 71 forward feeds medium under pressure to the motor 5 via the set of transfer lines 72.

The motor 5 drives the pitch limiting gear 4 to rotate in the forward direction under the driving of the pressure medium, and the pitch limiting gear 4 drives the tooth moving ring 3 meshed with the pitch limiting gear to rotate around the rod clamp assembly 2. The toothed ring 3 pushes the push rod 24 of the rod clip assembly 2 to rotate limitedly around the positioning pin 28, so as to push the sucker rod body in the opening of the rod containing hole 22 to close to the center of the rod containing hole 22.

When the sucker rod body enters the rod containing hole 22 and the circle center of the sucker rod body coincides with the circle center of the rod containing hole 22, the selective switch 75 is closed, so that the motor 5 stops rotating. When the motor 5 stops rotating, the pitch gear 4 and the toothed movable ring 3 stop rotating. The toothed ring 3 is pressed against the pushing rod 24 to complete the locking of the sucker rod body, so as to prevent the sucker rod body from sliding down along the radial direction of the rod containing hole 22.

The sucker rod elevator is moved so that the lower flange body at the top end of the sucker rod is seated in the countersunk groove 23 to prevent the sucker rod from sliding off transversely to damage the push rod member 24. The fixed clamping device is released, and the lifting system is operated to drive the sucker rod elevator to slowly rise at a constant speed until the bottom of the sucker rod body is higher than the well mouth.

After the screw thread of the sucker rod is removed, the lifting system is operated to enter the ground transferring procedure of the sucker rod, namely, the bottom of the sucker rod body is pulled in the descending process of the lifter, so that the sucker rod gradually enters a horizontal posture and is far away from a well mouth.

When the elevator descends to the top end of the sucker rod close to the height of a wellhead, the selection switch 75 is operated to reversely input current to the electro-hydraulic valve 71 through the lead group 74, and the electro-hydraulic valve 71 reversely transmits medium under pressure to the motor 5 through the transmission line group 72. The motor 5 drives the gear moving ring 3 to rotate reversely through the pitch limiting gear 4 under the driving of a pressure medium, and the control of the gear moving ring 3 on the push rod piece 24 is released. The push rod piece 24 rotates around the positioning pin 28 under the action of the reset elastic piece 27 to return to the initial position, and the blockage of the rod containing hole 22 is removed, so that the sucker rod is separated from the sucker rod elevator under the action of self weight.

Exemplarily, the sucker rod elevator needs to be hung and picked up when the sucker rod is dropped, and the operation process of hanging and picking the sucker rod elevator is as follows:

the preparation work is completed, including the use of a lifting ring or a cable hook to enable the sucker rod elevator to be integrated into the lifting system through the lifting ring shoulder hole group 12 of the base platform body 1, the upstream of a selective control switch 75 to be connected with an on-board storage battery of the workover rig, and the upstream of an electro-hydraulic valve 71 to be connected with a hydraulic system of the workover rig. The sucker rod body which is put into the well is exposed to a certain height and fixed by fixed clamping equipment of the well mouth, and the sucker rod which is put into the well in advance is inclined from the ground to the well mouth and the top end of the sucker rod is close to the well mouth sucker rod.

The sucker rod elevator is moved to align the gap of the rod receiving hole 22 with the pre-well sucker rod body, and then the sucker rod elevator is moved to approach the pre-well sucker rod body, so that the sucker rod body enters the gap of the rod receiving hole 22 under the guidance of the lead-in group 29.

The selection switch 75 is operated to forward current to the electro-hydraulic valve 71 via the set of conductors 74, and the electro-hydraulic valve 71 forward feeds medium under pressure to the motor 5 via the set of transfer lines 72.

The motor 5 drives the pitch limiting gear 4 to rotate in the forward direction under the driving of the pressure medium, and the pitch limiting gear 4 drives the tooth moving ring 3 meshed with the pitch limiting gear to rotate around the rod clamp assembly 2. The toothed ring 3 pushes the push rod 24 of the rod clip assembly 2 to rotate limitedly around the positioning pin 28, so as to push the sucker rod body in the gap of the rod containing hole 22 to close to the center of the rod containing hole 22.

When the sucker rod body enters the rod containing hole 22 and the circle center of the sucker rod body coincides with the circle center of the rod containing hole 22, the selective switch 75 is closed, so that the motor 5 stops rotating. When the motor 5 stops rotating, the pitch gear 4 and the toothed movable ring 3 stop rotating. The toothed movable ring 3 is pressed against the push rod piece 24 to complete the locking of the sucker rod body, so as to prevent the sucker rod body from sliding down along the radial direction of the rod containing hole 22.

The sucker rod elevator is moved so that the lower flange body at the top end of the sucker rod is seated in the countersunk groove 23 to prevent the sucker rod from sliding off transversely to damage the push rod member 24. The lifting system is operated to drive the pumping rod elevator to slowly rise at a constant speed until the bottom of the pumping rod body is close to the top end of the oil pumping pipe which is lowered into the well. The elevator is operated to slowly cooperate with the screw thread at uniform speed to complete the screwing operation of the screw thread of the sucker rod.

The fixed clamping equipment of the well mouth is released, and when the operation lifter slowly descends to the top end of the sucker rod and is close to the height of the well mouth, the fixed clamping equipment of the well mouth is used for fixing the sucker rod body again.

The selection switch 75 is operated to reverse the current input to the electro-hydraulic valve 71 through the set of conductors 74, and the electro-hydraulic valve 71 reverses the transmission of the medium under pressure to the motor 5 through the set of transmission lines 72.

The motor 5 drives the gear moving ring 3 to rotate reversely through the pitch limiting gear 4 under the driving of a pressure medium, and the control of the gear moving ring 3 on the push rod piece 24 is released. The push rod piece 24 returns to the initial position under the action of the reset elastic piece 27 and removes the blockage of the rod containing hole 22, and the sucker rod hanging card is separated from the sucker rod body of the wellhead under the action of self weight.

The elevator of the movable sucker rod is close to the next sucker rod to be put into the well. And repeating the operations to complete the continuous operation of putting the sucker rod.

To sum up the sucker rod elevator that this application embodiment provided has realized the operation of automatic card and holding, release sucker rod through the direction of rotation of accuse system control motor. The sucker rod elevator drives the gear movable ring to push the push rod piece through the motor forward driving distance limiting gear, so that the sucker rod elevator can effectively clamp the sucker rod body; this sucker rod elevator drives the tooth rotating ring through motor back drive limit for distance gear and removes the restriction to the push rod piece, utilizes the elastic component that resets to drive the push rod piece and resets, has realized the quick release of sucker rod elevator to the sucker rod elevator. The sucker rod elevator that this application embodiment provided has improved the operating efficiency who picks the sucker rod elevator of having hung down the sucker rod in-process, has reduced the safety risk of manual work at the well head operation.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.