Sucker rod lifting appliance

Abstract

The invention relates to the technical field of well repairing devices, in particular to a sucker rod lifting appliance which comprises a sucker rod elevator provided with an opening groove with a forward opening for a sucker rod to penetrate through, and is characterized by further comprising a sucker rod lifting mechanism and a mounting frame, the sucker rod elevator is mounted on the mounting frame, and the sucker rod lifting mechanism is mounted on the mounting frame. The sucker rod lifting mechanism comprises a pressing weight, a cantilever, a jacking seat and a jacking driving component used for driving the jacking seat to move up and down, the front end of the cantilever is hinged to the pressing weight located over the open groove and used for bearing the end of the sucker rod, the pressing weight is provided with a pressing weight opening allowing the sucker rod to penetrate through, and the rear end of the cantilever is hinged to the mounting frame. And the middle part of the cantilever is hinged with the jacking seat. The sucker rod lifting mechanism is reasonable in structure, and the sucker rod lifting mechanism is arranged, so that the sucker rod can be lifted through the ram when the sucker rod is put down, the sucker rod is prevented from being bent under the action of the gravity of the sucker rod, it is guaranteed that butt joint threads of the sucker rod are aligned, and butt joint wrong buckling of the sucker rod is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of well repair devices and relates to a sucker rod hanger. Background Art

[0002] The sucker rod elevator is a special tool used to lift the sucker rod in oilfield workover operations. During the sucker rod lowering operation, the driller controls the lifting ring to fall, and the sucker rod elevator on the lifting ring lowers the sucker rod. When the lower end of the sucker rod on the sucker rod elevator contacts the upper end of the sucker rod in the wellhead, the driller controls the lifting ring to stop falling, and then controls the hydraulic clamp to tighten the sucker rod with the sucker rod in the wellhead. However, since the lifting ring is manually controlled by the driller, it is difficult to stop the lifting ring from falling immediately when the upper and lower sucker rods touch. In actual operation, the lower end of the sucker rod contacts the upper end of the sucker rod in the wellhead. After the upper end of the oil rod makes contact, the lifting ring will continue to drop two or three centimeters before it actually stops falling. This will cause the sucker rod elevator to loosen the sucker rod. The sucker rod elevator has no upward lifting force on the sucker rod. The weight of the sucker rod itself is borne entirely by its lower end. Moreover, due to the large aspect ratio of the sucker rod, the sucker rod is prone to bending under the action of its own gravity. The upper and lower ends of the bent sucker rod are skewed, resulting in the inability to align the threads of the upper and lower sucker rod joints, resulting in the problem of cross-threading, and then the sucker rod connection thread is damaged when the hydraulic pliers are forcibly buckled. Summary of the Invention

[0003] The present invention provides a sucker rod hanger, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the sucker rod is bent due to its own gravity when the existing sucker rod hanger is used for sucker rod lowering operation, thereby causing the sucker rod to be mis-threaded.

[0004] The technical solution of the present invention is achieved through the following measures: a sucker rod hanger, including a sucker rod elevator, the sucker rod elevator is provided with an open groove facing forward for the sucker rod to pass through, and also includes a sucker rod lifting mechanism and a mounting frame, the sucker rod elevator is installed on the mounting frame, the sucker rod lifting mechanism includes a pressure weight, a cantilever, a lifting seat and a lifting drive component for driving the lifting seat to move up and down, the front end of the cantilever and the pressure weight located directly above the opening groove for supporting the end of the sucker rod are hingedly connected, the pressure weight is provided with a pressure weight opening for the sucker rod to pass through, the rear end of the cantilever is hingedly connected to the mounting frame, the middle part of the cantilever is hingedly connected to the lifting seat, and the lifting drive component is a lifting cylinder or a lifting oil cylinder.

[0005] The following are further optimizations and / or improvements to the above invention: The jacking seat is provided with at least two hinge holes spaced front and back, and the cantilever is provided with a hinge slot matching the hinge holes. The jacking seat and the cantilever are hingedly connected together through the matching hinge holes, the hinge slot and the rotating shaft.

[0006] The above-mentioned cantilever includes a straight section and a semicircular ring section. The rear end of the straight section is hinged to the mounting frame, the middle part of the straight section is hinged to the lifting seat, the front end of the straight section is fixedly connected to the middle part of the semicircular ring section, and the pressure weight is hinged to the semicircular ring section through two left and right hinge shafts.

[0007] The movable sleeve on the piston rod of the above-mentioned jacking drive component is provided with two upper and lower limit guide sleeves, and the two limit guide sleeves are fixedly connected to the mounting frame respectively. A compression spring is provided on the piston rod of the jacking drive component corresponding to the position between the two limit guide sleeves, and the upper and lower ends of the compression spring are respectively against the upper and lower limit guide sleeves. A spring limit pin is provided on the piston rod of the jacking drive component corresponding to the lower end position of the compression spring.

[0008] The above-mentioned sucker rod elevator includes an elevator seat, a cylindrical pin, a front tongue, a rear tongue and a torsion spring. The elevator seat is provided with an open slot for the sucker rod to pass through. Two front tongues and two rear tongues are symmetrically arranged on the left and right sides of the open slot. The front tongue and the rear tongue are rotatably mounted on the elevator seat through the cylindrical pin and the torsion spring.

[0009] The above-mentioned sucker rod elevator also includes a driving device for driving the two rear tongues to rotate to open the opening groove; the driving device includes two rotating cylinders arranged symmetrically on the left and right, and a sprocket is provided on the output shaft of each rotating cylinder. The sprocket on the left rotating cylinder is connected to the right rear tongue through a chain, and the sprocket on the right rotating cylinder is connected to the left rear tongue through a chain.

[0010] Axle sleeves are rotatably mounted on the left and right sides of the hanging card seat, and an outer ring groove adapted to the hanging ring is provided on the outer side surface of the shaft sleeve.

[0011] The present invention has a reasonable structure. By arranging a sucker rod lifting mechanism, the sucker rod can be lifted by the pressure weight when the sucker rod is lowered, thereby preventing the sucker rod from bending under the action of its own gravity, ensuring that the sucker rod butt threads are aligned, and avoiding wrong threading of the sucker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attachment Figure 1 Schematic diagram of the top view of the best embodiment of the present invention.

[0013] Attachment Figure 2 It is a left-side structural schematic diagram of the best embodiment of the present invention.

[0014] Attachment Figure 3 A perspective view of the best embodiment of the present invention.

[0015] Attachment Figure 4 Schematic diagram of the structure of the pressure weight and cantilever in the best embodiment of the present invention.

[0016] Attachment Figure 5 It is a three-dimensional diagram of the sucker rod elevator in the best embodiment of the present invention.

[0017] Attachment Figure 6 This is a schematic diagram of the main structure of the sucker rod elevator in the best embodiment of the present invention.

[0018] Attachment Figure 7 For attachment Figure 6 Schematic diagram of the cross-section structure along line AA.

[0019] Attachment Figure 8 This is a three-dimensional view of the best embodiment of the present invention when the pressure weight is lifted to support the sucker rod.

[0020] Attachment Figure 9 This is a schematic diagram of the left side structure of the best embodiment of the present invention when the pressure weight is not lifted to support the sucker rod.

[0021] Attachment Figure 10 This is a schematic diagram of the left side structure of the best embodiment of the present invention when the pressure weight is lifted to support the sucker rod.

[0022] The codes in the accompanying drawings are: 1 for the opening slot, 2 for the mounting frame, 3 for the pressure weight, 4 for the lifting seat, 5 for the lifting drive component, 6 for the pressure weight opening, 7 for the hinged hole, 8 for the hinged through slot, 9 for the straight section, 10 for the semicircular ring section, 11 for the limiting guide sleeve, 12 for the compression spring, 13 for the hanging card seat, 14 for the cylindrical pin, 15 for the front tongue, 16 for the rear tongue, 17 for the rotating cylinder, 18 for the sprocket, 19 for the chain, 20 for the bushing, and 21 for the sucker rod. DETAILED DESCRIPTION

[0023] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0024] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 For example, the positional relationships of front, back, up, down, left, and right are determined according to the layout directions of the drawings in the specification.

[0025] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: As attached Figure 1-10As shown, the sucker rod hanger includes a sucker rod elevator, which is provided with an open groove 1 with an opening facing forward for the sucker rod 21 to pass through. The sucker rod hanger also includes a sucker rod lifting mechanism and a mounting frame 2. The sucker rod elevator is installed on the mounting frame 2. The sucker rod lifting mechanism includes a pressure weight 3, a cantilever, a lifting seat 4 and a lifting drive component 5 for driving the lifting seat 4 to move up and down. The front end of the cantilever is hingedly connected to the pressure weight 3 located directly above the open groove 1 for supporting the end of the sucker rod 21. The pressure weight 3 is provided with a pressure weight opening 6 for the sucker rod 21 to pass through. The rear end of the cantilever is hingedly connected to the mounting frame 2, and the middle part of the cantilever is hingedly connected to the lifting seat 4. The lifting drive component 5 is a lifting cylinder or a lifting oil cylinder.

[0026] The hinge axes of the cantilever and the mounting frame 2, the pressure weight 3, and the jacking seat 4 are all arranged in the left and right directions. The pressure weight 3 is a "C" shape with the opening facing forward. The inner diameter of the pressure weight 3 is larger than the outer diameter of the rod body of the sucker rod 21 and is smaller than the outer diameter of the joint of the sucker rod 21. The jacking drive component 5 is installed on the mounting frame 2 and the piston rod can be extended vertically upward. The jacking seat 4 is fixedly installed on the top of the piston rod of the jacking drive component 5. Specifically, when the jacking drive component 5 drives the jacking seat 4 to move upward, the lifting force of the pressure weight 3 on the sucker rod 21 is greater than or equal to 75% of the weight of the sucker rod 21 and is less than the weight of the sucker rod 21. When the extended end of the piston rod of the jacking drive component 5 extends from the lowest point to the highest point, the lifting distance of the pressure weight 3 is large. The weight 3 is 4 cm, so when the sucker rod 21 is lifted by the weight 3, it can not only ensure that the sucker rod 21 is in a vertical state, but also ensure that the lower end of the sucker rod 21 is not out of contact with the upper end of the sucker rod in the wellhead. In this embodiment, the piston rod stroke of the jacking drive component 5 is 15 mm, and the maximum lifting height of the weight 3 is 48 mm; specifically, the cantilever includes a straight section 9 and a semicircular ring section 10, the rear end of the straight section 9 is hinged to the mounting frame 2, the middle part of the straight section 9 is hinged to the lifting seat 4, the front end of the straight section 9 is fixedly connected to the middle part of the semicircular ring section 10, and the weight 3 is hinged to the semicircular ring section 10 through the left and right hinge shafts, thereby facilitating that the weight 3 is in a horizontal state when lifting the sucker rod 21 upward relative to the sucker rod elevator.

[0027] When the sucker rod is lowered, the present application is installed on the lifting ring. Initially, the extended end of the piston rod of the jacking drive component 5 is at the lowest point, and the weight 3 sits on the sucker rod elevator. The upper end of the sucker rod 21 is lifted by the sucker rod elevator, and the upper end joint of the sucker rod 21 is supported on the weight 3. The driller controls the lifting ring to fall, and the sucker rod elevator hangs the sucker rod 21 down. When the lower end joint of the sucker rod 21 on the sucker rod elevator contacts the upper end joint of the sucker rod in the wellhead, the driller controls the lifting ring to stop falling. When the lifting ring really stops falling, the sucker rod hanger has been separated from the pumping rod. 2 to 3 cm from the upper end of the oil rod 21, the hydraulic clamp and the jacking drive component 5 are started after the lifting ring stops falling. The piston rod of the jacking drive component 5 extends upward to jack up the jacking seat 4. Under the action of the lever principle, the pressure weight 3 moves upward to contact the upper end of the sucker rod 21, and generates an upward lifting force on the upper end of the sucker rod 21. The sucker rod 21 is in a vertical state under the lifting action of the pressure weight 3, thereby preventing the sucker rod 21 from bending under the action of its own gravity, ensuring that the upper and lower sucker rods are connected and threaded, and avoiding the upper and lower sucker rods from being connected and buckled.

[0028] The above embodiments may be further optimized and / or improved according to actual needs: As attached Figure 2-4 As shown, the lifting seat 4 is provided with at least two hinge holes 7 spaced apart from each other, and the cantilever is provided with a hinge slot 8 that matches the hinge holes 7. The lifting seat 4 and the cantilever are hingedly connected together through the matching hinge holes 7, the hinge slot 8 and the rotating shaft.

[0029] When the jacking seat 4 and the cantilever are hinged together through different hinge holes 7, the hinge point of the jacking seat 4 and the cantilever is at a different distance from the hinge point of the mounting frame 2 and the cantilever, that is, the length of the jacking force arm is different. Therefore, when the jacking force of the jacking drive component 5 is the same, the lifting force generated by the pressure weight 3 is different. Therefore, different hinge holes 7 can be selected according to different types of sucker rods to enhance the applicability of this application. The diameters of common sucker rods on the market are 16mm, 19mm, 22mm, and 25mm, respectively, and their masses are 12.6kg, 17.8kg, 23.9kg, and 30.8kg, respectively. In this embodiment, the jacking The driving component 5 is a lifting cylinder with a cylinder diameter of 50mm and a lifting force of 78 kg. The lifting seat 4 is provided with four hinge holes 7 spaced front and back. The four hinge holes 7 are the first hinge hole, the second hinge hole, the third hinge hole and the fourth hinge hole from front to back. When the lifting seat 4 and the cantilever are hinged together through the first hinge hole, the lifting force generated by the pressure weight 3 is 24.5 kg, which is about 80% of the weight of a sucker rod with a diameter of 25mm. Under this lifting force, the sucker rod with a diameter of 25mm can be kept in a vertical state and the lower end will not be out of contact with the upper end of the sucker rod in the wellhead. Therefore, the first hinge hole 7 is suitable for lifting. Lift a sucker rod with a diameter of 25 mm; when the lifting seat 4 and the cantilever are hinged together through the second hinge hole, the lifting force generated by the pressure weight 3 is 18 kg, which is about 75% of the weight of a sucker rod with a diameter of 22 mm. At this lifting force, a sucker rod with a diameter of 22 mm can be kept in a vertical state and the lower end will not be out of contact with the upper end of the sucker rod in the wellhead. Therefore, the second hinge hole is suitable for lifting a sucker rod with a diameter of 22 mm; when the lifting seat 4 and the cantilever are hinged together through the third hinge hole, the lifting force generated by the pressure weight 3 is 14 kg, which is about 75% of the weight of a sucker rod with a diameter of 19 mm. 8%. At this lifting force, a sucker rod with a diameter of 19 mm can be kept in a vertical state, and the lower end will not be out of contact with the upper end of the sucker rod in the wellhead. Therefore, the third hinge hole is suitable for lifting a sucker rod with a diameter of 19 mm; when the lifting seat 4 and the cantilever are hinged together through the fourth hinge hole, the lifting force generated by the pressure weight 3 is 10 kg, which is about 80% of the weight of a sucker rod with a diameter of 16 mm. At this lifting force, a sucker rod with a diameter of 16 mm can be kept in a vertical state, and the lower end will not be out of contact with the upper end of the sucker rod in the wellhead. Therefore, the first hinge hole is suitable for lifting a sucker rod with a diameter of 16 mm.

[0030] As attached Figure 2As shown, an upper and lower limiting guide sleeves 11 are provided on the movable sleeve of the piston rod of the jacking drive component 5. The two limiting guide sleeves 11 are respectively fixedly connected to the mounting frame 2. A compression spring 12 is provided on the piston rod of the jacking drive component 5 corresponding to the position between the two limiting guide sleeves 11. The upper and lower ends of the compression spring 12 are respectively abutted against the upper and lower limiting guide sleeves 11. A spring limiting pin is provided on the piston rod of the jacking drive component 5 corresponding to the lower end position of the compression spring 12.

[0031] As attached Figure 1-3 As shown in Figures 5-8, the sucker rod elevator includes an elevator seat 13, a cylindrical pin 14, a front tongue 15, a rear tongue 16 and a torsion spring. The elevator seat 13 is provided with an open slot 1 for the sucker rod to pass through. Two front tongues 15 and two rear tongues 16 are symmetrically provided on the left and right sides of the open slot 1. The front tongue 15 and the rear tongue 16 are rotatably mounted on the elevator seat 13 through the cylindrical pin 14 and the torsion spring. When the front parts of the two rear tongues 16 are opened to the left and right sides, the rear parts of the two front tongues 15 can be pushed to open to the left and right sides. Under normal conditions, the rear parts of the two front tongues 15 are close to each other under the action of the torsion spring to close the opening slot 1. When the sucker rod is to be placed in the sucker rod elevator, the opening slot 1 is aligned with the sucker rod and the elevator seat 13 is pushed close to the sucker rod. The sucker rod and the rear parts of the front tongues 15 are abutted and pushed to open the opening slot 1 to the left and right sides. After the sucker rod enters the opening slot 1, the two front tongues 15 are reset and close the opening slot 1 again under the action of the torsion spring. When the sucker rod is to be withdrawn, the two rear tongues 16 are moved to make the rear parts of the two front tongues 15 open to the left and right sides, thereby opening the opening slot 1.

[0032] As attached Figure 1-3 As shown in Figures 5-8, the sucker rod elevator also includes a drive device for rotating the two rear tongues 16 to open the opening slot 1. The drive device includes two symmetrically arranged rotary cylinders 17. Each rotary cylinder 17 has a sprocket 18 on its output shaft. The sprocket 18 on the left rotary cylinder 17 is connected to the right rear tongue 16 via a chain 19, while the sprocket 18 on the right rotary cylinder 17 is connected to the left rear tongue 16 via a chain 19. The rotary cylinders 17 control the rotation of the two rear tongues 16, thereby achieving automatic opening and closing of the sucker rod elevator, providing the hardware foundation for automated operations of hooking and unhooking the sucker rod elevator.

[0033] As attached Figure 1-3 As shown in Figures 5-8, the left and right sides of the hanging card seat 13 are rotatably mounted with shaft sleeves 20, and the outer surface of the shaft sleeve 20 is provided with an outer ring groove adapted to the hanging ring. Thus, the present application can be hung on the hanging ring through the shaft sleeve 20 and can rotate relative to the hanging ring.

[0034] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A sucker rod hanger, comprising a sucker rod elevator, wherein the sucker rod elevator is provided with an opening groove with an opening facing forward for the sucker rod to pass through, characterized in that It also includes a sucker rod lifting mechanism and a mounting frame. The sucker rod elevator is installed on the mounting frame. The sucker rod lifting mechanism includes a pressure weight, a cantilever, a lifting seat and a lifting drive component for driving the lifting seat to move up and down. The front end of the cantilever is hingedly connected to the pressure weight located directly above the opening groove for supporting the end of the sucker rod. A pressure weight opening for the sucker rod to pass through is provided on the pressure weight. The rear end of the cantilever is hingedly connected to the mounting frame, and the middle part of the cantilever is hingedly connected to the lifting seat. The lifting drive component is a lifting cylinder or a lifting oil cylinder.

2. The sucker rod hanger according to claim 1, characterized in that The lifting seat is provided with at least two hinge holes spaced front and back, the cantilever is provided with a hinge slot matched with the hinge holes, and the lifting seat and the cantilever are hingedly connected together through the matching hinge holes, the hinge slot and the rotating shaft.

3. The sucker rod hanger according to claim 1 or 2, characterized in that The cantilever includes a straight section and a semicircular ring section. The rear end of the straight section is hinged to the mounting frame, the middle part of the straight section is hinged to the lifting seat, the front end of the straight section is fixedly connected to the middle part of the semicircular ring section, and the pressure weight is hinged to the semicircular ring section through two left and right hinge shafts.

4. The sucker rod hanger according to claim 1 or 2, characterized in that The movable sleeve on the piston rod of the jacking drive component is provided with an upper and lower limit guide sleeves, and the two limit guide sleeves are fixedly connected to the mounting frame respectively. A compression spring is provided on the piston rod of the jacking drive component corresponding to the position between the two limit guide sleeves. The upper and lower ends of the compression spring are respectively against the upper and lower limit guide sleeves, and a spring limit pin is provided on the piston rod of the jacking drive component corresponding to the lower end position of the compression spring.

5. The sucker rod hanger according to claim 3, characterized in that The movable sleeve on the piston rod of the jacking drive component is provided with an upper and lower limit guide sleeves, and the two limit guide sleeves are fixedly connected to the mounting frame respectively. A compression spring is provided on the piston rod of the jacking drive component corresponding to the position between the two limit guide sleeves. The upper and lower ends of the compression spring are respectively against the upper and lower limit guide sleeves, and a spring limit pin is provided on the piston rod of the jacking drive component corresponding to the lower end position of the compression spring.

6. The sucker rod hanger according to claim 1, 2 or 5, characterized in that The sucker rod elevator includes an elevator seat, a cylindrical pin, a front tongue, a rear tongue and a torsion spring. The elevator seat is provided with an open slot for the sucker rod to pass through. Two front tongues and two rear tongues are symmetrically arranged on the left and right sides of the open slot. The front tongue and the rear tongue are rotatably mounted on the elevator seat through the cylindrical pin and the torsion spring.

7. The sucker rod hanger according to claim 3, characterized in that The sucker rod elevator includes an elevator seat, a cylindrical pin, a front tongue, a rear tongue and a torsion spring. The elevator seat is provided with an open slot for the sucker rod to pass through. Two front tongues and two rear tongues are symmetrically arranged on the left and right sides of the open slot. The front tongue and the rear tongue are rotatably mounted on the elevator seat through the cylindrical pin and the torsion spring.

8. The sucker rod hanger according to claim 6, characterized in that The sucker rod elevator also includes a driving device for driving the two rear tongues to rotate to open the opening groove; the driving device includes two rotary cylinders symmetrically arranged on the left and right, and a sprocket is provided on the output shaft of each rotary cylinder. The sprocket on the left rotary cylinder is connected to the right rear tongue through a chain, and the sprocket on the right rotary cylinder is connected to the left rear tongue through a chain.

9. The sucker rod hanger according to claim 7, characterized in that The sucker rod elevator also includes a driving device for driving the two rear tongues to rotate to open the opening groove; the driving device includes two rotary cylinders symmetrically arranged on the left and right, and a sprocket is provided on the output shaft of each rotary cylinder. The sprocket on the left rotary cylinder is connected to the right rear tongue through a chain, and the sprocket on the right rotary cylinder is connected to the left rear tongue through a chain.

10. The sucker rod hanger according to claim 1, 2, 5, 7, 8 or 9, characterized in that A shaft sleeve is rotatably mounted on the left and right sides of the hanging card seat, and an outer ring groove adapted to the hanging ring is provided on the outer side of the shaft sleeve.

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