Polish rod lifting buffer device and method for heavy oil pumping unit well

Abstract

The invention relates to the technical field of ground tools, in particular to a lifting buffering device and method for a polished rod of a thickened oil pumping unit well, the lifting buffering device comprises the polished rod, a clamp body, a lifting assembly and a packing box, the clamp body, the lifting assembly and the packing box are sequentially arranged on the outer side of the polished rod from top to bottom, and the clamp body comprises a front clamp and a rear clamp; the left part of the front clamp and the left part of the rear clamp are detachably and fixedly mounted together; the method comprises the following steps that (1) the upper supporting cylinder, the rotating sleeve and the lower supporting cylinder are installed on the outer side of the polish rod through the first long installing groove, the second long installing groove and the third long installing groove respectively. The device is reasonable and compact in structure and ingenious in conception, the upper supporting cylinder ascends by rotating the rotating sleeve, and lifting of the clamp body and the polished rod is completed; by unscrewing the adjusting bolts arranged on the front side and the rear side, the polish rod is slowly lowered through self gravity under the action of friction force of the front rubber pad and the rear rubber pad, and the device has the advantages of being fast, stable and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of well tools, and relates to a light rod lifting buffer device and method for a heavy oil pumping well. Background Art

[0002] In heavy oil production, production wells often use integrated injection-production pumps for production. The two stages of steam injection and oil pumping require lifting and lowering the pump. The company uses integrated injection-production pumps for 3,014 wells, injects steam and pumps 729 wells each year. During the operation of this project, it is necessary to frequently perform operations to install and remove the bare rod clips, and at the same time, frequently start the pumping unit to load and unload the bare rod clips. The labor intensity is high, and each lifting or lowering requires two people to operate for more than 30 minutes. In addition, during the operation, due to improper operation, the clips are not tightened, the brakes are not tightened, etc., safety accidents such as the operator's hands being clamped in the lower part of the bare rod clip causing injury often occur, causing great harm to the company and employees. Summary of the invention

[0003] The present invention provides a light rod lifting buffer device and method for a heavy oil pumping well, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing light rod clips need to be frequently disassembled and assembled.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a light rod lifting buffer device for a heavy oil pumping well, comprising a light rod and a clamp body, a lifting assembly and a packing box arranged on the outside of the light rod in sequence from top to bottom, the clamp body comprising a front clamp and a rear clamp, the right part of the front clamp and the right part of the rear clamp are hinged together, and the left part of the front clamp and the left part of the rear clamp are detachably fixed together; the lifting assembly comprises an upper support cylinder, a rotating sleeve and a lower support cylinder, the outer side of the lower part of the upper support cylinder is provided with a first external thread, the outer side of the upper part of the lower support cylinder is provided with a second external thread, the first external thread and the second external thread are in opposite rotation directions, and the inner side of the upper part of the rotating sleeve is provided with a thread that rotates in the same direction as the first external thread. The outer side of the upper support tube is provided with a first internal thread that matches the external thread, and the lower part of the upper support tube is installed on the inner side of the upper part of the rotating sleeve through a threaded connection. The inner side of the lower part of the rotating sleeve is provided with a second internal thread that matches the second external thread. The upper part of the lower support tube is installed on the inner side of the lower part of the rotating sleeve through a threaded connection. The outer side of the upper support tube is provided with a first loading long groove that runs through the upper and lower parts and can be connected with the inner part thereof. The outer side of the rotating sleeve is provided with a second loading long groove that runs through the upper and lower parts and can be connected with the inner part thereof. The outer side of the lower support tube is provided with a third loading long groove that runs through the upper and lower parts and can be connected with the inner part thereof. The lower side of the clamp body is seated on the upper side of the upper support tube, and the lower side of the lower support tube is installed together with a detachable limiter on the upper side of the packing box.

[0005] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: The above-mentioned clamp body may also include a front rubber pad and a rear rubber pad, a first mounting groove is provided in the center of the rear side of the front clamp, the front rubber pad is provided in the first mounting groove, the front rubber pad is in the shape of a semicircular ring with an opening facing backwards, a second mounting groove is provided in the center of the front side of the rear clamp, the rear rubber pad is provided in the second mounting groove, the rear rubber pad is in the shape of a semicircular ring with an opening facing forwards, and a clamping hole is formed between the front rubber pad and the rear rubber pad for clamping the corresponding position of the outer side of the light rod.

[0006] The above-mentioned clamp body may also include a front adjusting component and a rear adjusting component, a third mounting slot is provided in the center of the front side of the first mounting slot, a front mounting hole is provided in the center of the front side of the front clamp and can be communicated with the third mounting slot, a fourth mounting slot is provided in the center of the rear side of the second mounting slot, and a rear mounting hole is provided in the center of the rear side of the rear clamp and can be communicated with the fourth mounting slot; the front adjusting component includes an adjusting bolt, a rotating rod, a rotating sleeve and a pushing plate, a pushing plate is provided in the third mounting slot, the pushing plate is an arc plate with an opening facing backwards, and a rotating sleeve is fixedly installed in the center of the front side of the pushing plate and is located in the front mounting hole, a T-shaped notch is provided on the upper side of the rotating sleeve, a rotating rod with a front narrow and rear wide shape is provided, a rotating rod with a front end located in front of it is provided in the T-shaped notch, the rear part of the rotating rod is T-shaped, and the front end of the rotating rod is fixedly installed with an adjusting bolt with the front end located in front of the front clamp, and the adjusting bolt is fixedly installed in the front mounting hole through a threaded connection; a rear adjusting component with the front end located in the fourth mounting slot is provided in the rear mounting hole, and the rear adjusting component has the same structure as the front adjusting component and is symmetrically arranged front and back.

[0007] The second technical solution of the present invention is achieved by the following measures: A method for using the above-mentioned light rod lifting buffer device for heavy oil pumping wells comprises the following steps: (1) Install the upper support tube, the rotating sleeve and the lower support tube on the outer side of the polished rod through the first loading slot, the second loading slot and the third loading slot respectively, and install the upper support tube, the rotating sleeve and the lower support tube together from top to bottom in sequence through threaded connections; (2) Fix the lower side of the lower support tube and the upper side of the packing box together; (3) Clamp the front clamp and the rear clamp on the outer side of the polished rod at the upper side of the upper support tube, and seat the lower sides of the two clamps on the upper side of the upper support tube; (4) The left part of the rear front clamp and the left part of the rear clamp are detachably fixed together; (5) Tighten the adjusting bolts on the front and rear sides so that the front rubber pad and the rear rubber pad can hold the bare rod tightly under the action of the push-pull plate; (6) When the polished rod needs to be lifted to unload the rope hanger clip above the polished rod, the upper support tube, the fixture body and the polished rod are slowly lifted by rotating the rotating sleeve; (7) After the rope hanger clip is unloaded, loosen the adjustment bolts on the front and rear sides appropriately so that the front rubber pad and the rear rubber pad no longer hold the bare rod under the action of the push-pull plate. The bare rod slowly descends under the friction force of the front rubber pad and the rear rubber pad by its own gravity.

[0008] The present invention has a reasonable and compact structure and an ingenious design. By rotating the rotating sleeve, the upper support cylinder can be moved upward, and the lifting of the clamp body and the light rod can be completed; by tightening the adjusting bolts arranged on the front and rear sides, the front rubber pad and the rear rubber pad can hold the light rod under the action of the pushing plate; by loosening the adjusting bolts arranged on the front and rear sides, the light rod can be slowly lowered by its own gravity under the action of the friction force of the front rubber pad and the rear rubber pad, and the invention has the characteristics of being fast, stable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a schematic diagram of the main structure of embodiments 1 to 4.

[0010] Attached Figure 2 For attachment Figure 1 Schematic diagram of the three-dimensional structure.

[0011] Attached Figure 3 For attachment Figure 1 Schematic diagram of the top view and enlarged cross-section of the middle fixture body.

[0012] Attached Figure 4 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the clamp body.

[0013] Attached Figure 5 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the lifting assembly.

[0014] Attached Figure 6 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the mid-front adjustment component.

[0015] The codes in the accompanying drawings are: 1 is a bare rod, 2 is a packing box, 3 is a front clamp, 4 is a rear clamp, 5 is an upper support cylinder, 6 is a rotating sleeve, 7 is a lower support cylinder, 8 is a first external thread, 9 is a second external thread, 10 is a first loading long groove, 11 is a second loading long groove, 12 is a third loading long groove, 13 is a front rubber pad, 14 is a rear rubber pad, 15 is a first mounting groove, 16 is a second mounting groove, 17 is a third mounting groove, 18 is a fourth mounting groove, 19 is a front mounting hole, 20 is a rear mounting hole, 21 is an adjusting bolt, 22 is a rotating rod, 23 is a rotating sleeve, 24 is a push-against plate, 25 is a T-shaped notch, and 26 is a rear adjustment component. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0018] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figures 1 to 6 As shown, the light rod lifting buffer device for the heavy oil pumping well includes a light rod 1 and a clamp body, a lifting assembly and a packing box 2 arranged on the outside of the light rod 1 in sequence from top to bottom. The clamp body includes a front clamp 3 and a rear clamp 4. The right part of the front clamp 3 and the right part of the rear clamp 4 are hinged together, and the left part of the front clamp 3 and the left part of the rear clamp 4 are detachably fixed together; the lifting assembly includes an upper support tube 5, a rotating sleeve 6 and a lower support tube 7. The outer side of the lower part of the upper support tube 5 is provided with a first external thread 8, and the outer side of the upper part of the lower support tube 7 is provided with a second external thread 9. The first external thread 8 and the second external thread 9 are rotated in opposite directions. The inner side of the upper part of the rotating sleeve 6 is provided with a first internal thread matching the first external thread 8. Thread, the lower part of the upper support tube 5 is installed on the inner side of the upper part of the rotating sleeve 6 through a threaded connection, the inner side of the lower part of the rotating sleeve 6 is provided with a second internal thread matching the second external thread 9, the upper part of the lower support tube 7 is installed on the inner side of the lower part of the rotating sleeve 6 through a threaded connection, the outer side of the upper support tube 5 is provided with a first loading long groove 10 which passes through from top to bottom and can be connected with the inner part thereof, the outer side of the rotating sleeve 6 is provided with a second loading long groove 11 which passes through from top to bottom and can be connected with the inner part thereof, and the outer side of the lower support tube 7 is provided with a third loading long groove 12 which passes through from top to bottom and can be connected with the inner part thereof; the lower side of the clamp body is seated on the upper side of the upper support tube 5, and the lower side of the lower support tube 7 is installed together with a detachable limiter on the upper side of the packing box 2. During use, by rotating the rotating sleeve 6, the upper support tube 5 is moved upward, and the clamp body and the light rod 1 are lifted, so that the rope hanger clip above the light rod 1 is unloaded; by setting the first loading slot 10, the second loading slot 11 and the third loading slot 12, it is convenient to quickly install the lifting assembly on the outside of the light rod 1; the first external thread 8 and the second external thread 9 adopt a trapezoidal thread design, so that the upper support tube 5 can be extended 200mm after rotating the rotating sleeve 6 for several circles. According to the needs, the installation method of the lower support tube 7 and the packing box 2 can be to set a plurality of protrusions on the lower side of the lower support tube 7, and the upper side of the packing box 2 corresponding to each protrusion position is provided with a groove, and each protrusion is located in the groove at the corresponding position, so as to prevent the lower support tube 7 from rotating with the rotating sleeve 6; in addition, the installation method of the lower support tube 7 and the packing box 2 can also be a known detachable fixed installation method, such as flange connection.

[0019] According to actual needs, the above-mentioned light rod lifting buffer device for heavy oil pumping wells can be further optimized and / or improved: Embodiment 2: As attached Figures 1 to 6 As shown, the clamp body also includes a front rubber pad 13 and a rear rubber pad 14, a first mounting groove 15 is provided at the center of the rear side of the front clamp 3, the front rubber pad 13 is provided in the first mounting groove 15, and the front rubber pad 13 is in a semicircular ring shape with an opening facing backwards, a second mounting groove 16 is provided at the center of the front side of the rear clamp 4, the rear rubber pad 14 is provided in the second mounting groove 16, and the rear rubber pad 14 is in a semicircular ring shape with an opening facing forwards, and a clamping hole is formed between the front rubber pad 13 and the rear rubber pad 14 to clamp the corresponding position of the outer side of the polished rod 1. During use, by providing the front rubber pad 13 and the rear rubber pad 14, the stability of the clamp body when clamping the polished rod 1 is enhanced.

[0020] Embodiment 3: As attached Figures 1 to 6 As shown, the clamp body also includes a front adjustment component and a rear adjustment component 26, a third mounting groove 17 is provided in the center of the front side of the first mounting groove 15, a front mounting hole 19 which can be connected to the third mounting groove 17 is provided in the center of the front side of the front clamp 3, a fourth mounting groove 18 is provided in the center of the rear side of the second mounting groove 16, and a rear mounting hole 20 which can be connected to the fourth mounting groove 18 is provided in the center of the rear side of the rear clamp 4; the front adjustment component includes an adjusting bolt 21, a rotating rod 22, a rotating sleeve 23 and a push-resistance plate 24, a push-resistance plate 24 is provided in the third mounting groove 17, and the push-resistance plate 24 is an arc-shaped plate with an opening facing backwards, and the front side center of the push-resistance plate 24 A rotating sleeve 23 is fixedly installed in the front mounting hole 19, and a T-shaped notch 25 which is narrow in the front and wide in the back is provided on the upper side of the rotating sleeve 23. A rotating rod 22 with its front end located in front of it is provided in the T-shaped notch 25. The rear part of the rotating rod 22 is in a T-shape which is narrow in the front and wide in the back. An adjusting bolt 21 with its front part located in front of the front clamp 3 is fixedly installed at the front end of the rotating rod 22, and the adjusting bolt 21 is fixedly installed in the front mounting hole 19 by a threaded connection; a rear adjusting component 26 with its front part located in the fourth mounting groove 18 is provided in the rear mounting hole 20, and the rear adjusting component 26 has the same structure as the front adjusting component and is symmetrically arranged front to back. During use, by providing the front adjustment component and the rear adjustment component 26, the adjustment bolts 21 provided on the front and rear sides can be tightened before lifting, so that the front rubber pad 13 and the rear rubber pad 14 can lock the bare rod 1 under the action of the pushing plate 24; by providing the front adjustment component and the rear adjustment component 26, after the rope hanger clip above the bare rod 1 is unloaded, the adjustment bolts 21 provided on the front and rear sides can be appropriately loosened, so that the bare rod 1 is slowly lowered by its own gravity under the friction force of the front rubber pad 13 and the rear rubber pad 14, which plays a buffering role and avoids impact on the wellhead and the oil pump.

[0021] Embodiment 4: As attached Figures 1 to 6 As shown, a method for using the above-mentioned light rod lifting buffer device for heavy oil pumping wells includes the following steps: (1) The upper support tube 5, the rotating sleeve 6 and the lower support tube 7 are installed on the outer side of the polished rod 1 through the first loading slot 10, the second loading slot 11 and the third loading slot 12 respectively, and the upper support tube 5, the rotating sleeve 6 and the lower support tube 7 are installed together from top to bottom in sequence through threaded connections; (2) The lower side of the lower support tube 7 and the upper side of the packing box 2 are fixed together; (3) Clamp the front clamp 3 and the rear clamp 4 onto the outer side of the polished rod 1 at the upper side of the upper support tube 5, and seat the lower sides of the two clamps on the upper side of the upper support tube 5; (4) The left part of the rear front clamp 3 and the left part of the rear clamp 4 are detachably fixed together; (5) Tighten the adjusting bolts 21 provided on the front and rear sides so that the front rubber pad 13 and the rear rubber pad 14 are locked to the bare rod 1 under the action of the push-pull piece 24; (6) When it is necessary to lift the polished rod 1 to unload the rope hanger clip above the polished rod 1, the upper support tube 5, the clamp body and the polished rod 1 are slowly lifted by rotating the rotating sleeve 6; (7) After the rope hanger clip is unloaded, the adjusting bolts 21 arranged on the front and rear sides are loosened appropriately so that the front rubber pad 13 and the rear rubber pad 14 no longer hold the bare rod 1 under the action of the push-pull plate 24. The bare rod 1 is slowly lowered by its own gravity under the action of the friction force of the front rubber pad 13 and the rear rubber pad 14.

[0022] During use, the present invention can effectively reduce the frequency of starting and stopping the oil pump and removing the light rod clamp, and can realize the unloading of the upper clamp of the suspension rope on the ground, and can control the lowering speed of the light rod 1 through the adjusting bolts 21 arranged on the front and rear sides. When the light rod 1 column is lowered to the bottom of the pump, the present invention can be quickly and conveniently removed from the light rod 1.

[0023] 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 reduced according to actual needs to meet the requirements of different situations.

Claims

1. A light rod lifting buffer device for a heavy oil pumping well, characterized in that The utility model comprises a polished rod and a clamp body, a lifting assembly and a packing box which are sequentially arranged on the outside of the clamp body from top to bottom. The clamp body comprises a front clamp and a rear clamp. The right part of the front clamp and the right part of the rear clamp are hinged together, and the left part of the front clamp and the left part of the rear clamp are detachably fixed together. The lifting assembly comprises an upper support tube, a rotating sleeve and a lower support tube. The outer side of the lower part of the upper support tube is provided with a first external thread, the outer side of the upper part of the lower support tube is provided with a second external thread, the first external thread and the second external thread are rotated in opposite directions, the inner side of the upper part of the rotating sleeve is provided with a first internal thread matching the first external thread, and the lower part of the upper support tube is provided with a first internal thread matching the first external thread. The cam is installed on the inner side of the upper part of the rotating sleeve through a threaded connection, and the inner side of the lower part of the rotating sleeve is provided with a second internal thread matching the second external thread. The upper part of the lower support tube is installed on the inner side of the lower part of the rotating sleeve through a threaded connection. The outer side of the upper support tube is provided with a first long loading groove which runs through the upper and lower parts and can be connected with the inner part thereof. The outer side of the rotating sleeve is provided with a second long loading groove which runs through the upper and lower parts and can be connected with the inner part thereof. The outer side of the lower support tube is provided with a third long loading groove which runs through the upper and lower parts and can be connected with the inner part thereof. The lower side of the clamp body is seated on the upper side of the upper support tube, and the lower side of the lower support tube is installed together with a detachable limiter on the upper side of the packing box.

2. The light rod lifting buffer device for heavy oil pumping wells according to claim 1 is characterized in that The clamp body also includes a front rubber pad and a rear rubber pad. A first mounting groove is provided in the center of the rear side of the front clamp, and the front rubber pad is arranged in the first mounting groove. The front rubber pad is in the shape of a semicircular ring with an opening facing backward. A second mounting groove is provided in the center of the front side of the rear clamp, and the rear rubber pad is arranged in the second mounting groove. The rear rubber pad is in the shape of a semicircular ring with an opening facing forward. A clamping hole is formed between the front rubber pad and the rear rubber pad, which can clamp the corresponding position on the outer side of the light rod.

3. The light rod lifting buffer device for heavy oil pumping wells according to claim 2 is characterized in that The clamp body also includes a front adjusting component and a rear adjusting component, a third mounting slot is provided in the center of the front side of the first mounting slot, a front mounting hole which can be communicated with the third mounting slot is provided in the center of the front side of the front clamp, a fourth mounting slot is provided in the center of the rear side of the second mounting slot, and a rear mounting hole which can be communicated with the fourth mounting slot is provided in the center of the rear side of the rear clamp; the front adjusting component includes an adjusting bolt, a rotating rod, a rotating sleeve and a pushing plate, a pushing plate is provided in the third mounting slot, the pushing plate is an arc plate opening backward, and the rotating sleeve is fixedly installed in the center of the front side of the pushing plate and is located in the front mounting hole, a T-shaped notch which is narrow in front and wide in back is provided on the upper side of the rotating sleeve, a rotating rod which is located in front of it is provided in the T-shaped notch, and a rotating rod which is located in front of it is provided in the T-shaped notch, and the rear part of the rotating rod is T-shaped which is narrow in front and wide in back, and an adjusting bolt whose front part is located in front of the front clamp is fixedly installed at the front end of the rotating rod, and the adjusting bolt is fixedly installed in the front mounting hole by threaded connection; a rear adjusting component whose front part is located in the fourth mounting slot is provided in the rear mounting hole, and the rear adjusting component has the same structure as the front adjusting component and is symmetrically arranged front and back.

4. A method for lifting a smooth rod buffer device for a heavy oil pumping well as claimed in claim 3, characterized in that The steps include: (1) Install the upper support tube, the rotating sleeve and the lower support tube on the outer side of the polished rod through the first loading slot, the second loading slot and the third loading slot respectively, and install the upper support tube, the rotating sleeve and the lower support tube together from top to bottom in sequence through threaded connections; (2) Fix the lower side of the lower support tube and the upper side of the packing box together; (3) Clamp the front clamp and the rear clamp on the outer side of the polished rod at the upper side of the upper support tube, and seat the lower sides of the two clamps on the upper side of the upper support tube; (4) The left part of the rear front clamp and the left part of the rear clamp are detachably fixed together; (5) Tighten the adjusting bolts on the front and rear sides so that the front rubber pad and the rear rubber pad can hold the bare rod tightly under the action of the push-pull plate; (6) When the polished rod needs to be lifted to unload the rope hanger clip above the polished rod, the upper support tube, the fixture body and the polished rod are slowly lifted by rotating the rotating sleeve; (7) After the rope hanger clip is unloaded, loosen the adjustment bolts on the front and rear sides appropriately so that the front rubber pad and the rear rubber pad no longer hold the bare rod under the action of the push-pull plate. The bare rod slowly descends under the friction force of the front rubber pad and the rear rubber pad by its own gravity.

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