Anti-rotation device for polished rod of screw pump
By designing a screw pump rod anti-rotation device, the clamping assembly and anti-rotation structure are used to clamp and limit the rotation of the rod, the rotation problem caused by the residual torque of the rod after unloading is solved, and the operation safety is improved.
Patent Information
- Application Number
- CN202311714318.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2025-06-13
Smart Images
Figure CN120134237A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of oil production equipment in oil fields, and in particular to a polished rod anti-rotation device for screw pumps. Background Art
[0002] Screw pumps are a commonly used oil production machinery in oil field sites. However, during the production process, the drive head of the surface device often fails. When it cannot be repaired on site, the drive head needs to be replaced. During the replacement operation, first remove the polished rod clamp, lower the polished rod to the bottom with a crane, then remove the large flange bolts, and lift the original drive head off the polished rod with a crane. At this time, the polished rod is exposed above the large flange.
[0003] Regarding the above related technology, the inventor believes that although the polished rod has been unloaded, there is often still residual torque, and intermittent rotation of the polished rod occurs on site. Summary of the Invention
[0004] In order to control the unloaded polished rod, reduce the rotation of the polished rod, facilitate on-site operation and eliminate potential safety hazards, the present application provides a polished rod anti-rotation device for screw pumps.
[0005] A polished rod anti-rotation device provided by the present application adopts the following technical solutions:
[0006] A polished rod anti-rotation device for a screw pump includes a polished rod, a flange is coaxially arranged on the polished rod, a clamping assembly is arranged on the flange at a position relative to the polished rod, the clamping assembly can clamp the polished rod, a handle is horizontally arranged on the side wall of the clamping assembly, a through hole is vertically opened on the flange, and a positioning through rod is fixedly connected to the handle at a position relative to the through hole, and the positioning through rod passes through from the position of the through hole.
[0007] Optionally, the clamping assembly includes a first jaw block and a second jaw block arranged oppositely, the first jaw block and the second jaw block are hinged, clamping holes are opened at positions of the first jaw block and the second jaw block opposite to the polished rod, the first jaw block and the second jaw block clamp the polished rod through the clamping holes, and an opening and closing structure is arranged on the first jaw block and the second jaw block.
[0008] Optionally, the opening and closing structure includes a screw rod hinged to the first jaw block, a first avoidance hole is opened in the first jaw block relative to the screw rod, a second avoidance hole is opened in the second jaw block relative to the screw rod, a nut is threadedly connected to the screw rod outside the second jaw block, the outer diameter of the nut is greater than the width of the second avoidance hole, and the nut can abut against the side wall of the second jaw block.
[0009] Optionally, a union joint is provided on the side of the nut facing away from the second slip block. The union joint is fixedly connected to the nut. One side of the union joint is connected to an extension rod in a plug-in manner. A groove is provided at one end of the extension rod close to the union joint. The union joint can extend into the interior of the groove, and the extension rod drives the union joint to rotate through the engagement of the groove and the union joint.
[0010] Optionally, the union joint is of a rectangular structure, the groove is a rectangular groove body adapted to the union joint, and an elastic fastener is provided on the side wall of the union joint. A clamping groove is provided at a position in the groove of the extension rod corresponding to the elastic fastener. When the union joint extends into the interior of the groove, the elastic fastener extends into the interior of the clamping groove.
[0011] Optionally, the length of the extension rod is greater than the diameter of the flange.
[0012] Optionally, a handle is fixedly connected to the end of the extension rod facing away from the union joint.
[0013] Optionally, the length of the handle is greater than the diameter of the flange.
[0014] Optionally, avoidance grooves are respectively provided on the sides of the first slip block and the second slip block opposite to the hinge. A connecting block is horizontally provided inside the avoidance groove. One end of the connecting block extends into the interior of the first slip block, the other end of the connecting block extends into the interior of the second slip block, and the connecting block is respectively rotatably connected to the first slip block and the second slip block.
[0015] Optionally, both ends of the connecting block are of an arc chamfer structure.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] 1. The clamping assembly is provided to clamp and fix the polished rod. Through the relative cooperation of the first slip block and the second slip block, it is convenient for the operator to operate. The provided anti-rotation structure can be easily inserted into the through hole of the flange, thereby reducing the rotation of the clamping assembly and the polished rod.
[0018] 2. The provided extension rod and handle facilitate the operator to operate outside the flange, move the operation area away from the dangerous area of the overhead hoisting pump head, and improve the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is an overall structural schematic diagram of a polished rod anti-rotation device for a screw pump in an embodiment of the present application.
[0020] Figure 2It is a schematic structural diagram at the screw position of a polished rod anti-rotation device for a screw pump in an embodiment of the present application.
[0021] Figure 3 It is a cross-sectional view of a first slip block and a second slip block of a polished rod anti-rotation device for a screw pump in an embodiment of the present application.
[0022] Explanation of reference numerals: 1, polished rod; 2, flange; 21, through hole; 3, clamping assembly; 31, first slip block; 311, first avoidance hole; 32, second slip block; 321, second avoidance hole; 33, clamping hole; 34, avoidance groove; 35, connecting block; 36, screw; 37, nut; 371, swivel joint; 372, elastic ball; 38, extension rod; 4, anti-rotation structure; 41, handle; 411, first rod body; 412, second rod body; 42, positioning through rod. Detailed implementation manners
[0023] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0024] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.
[0025] The following combines the attached Figures 1-3 Further detailed description of the present application is made.
[0026] An embodiment of the present application discloses a polished rod anti-rotation device for a screw pump. Refer to Figure 1 、 Figure 2 , a polished rod anti-rotation device for a screw pump includes a vertically arranged polished rod 1, a flange 2 is coaxially sleeved outside the polished rod 1, and a plurality of through holes 21 are equidistantly arranged along the circumferential direction on the upper surface of the flange 2, and the through holes 21 completely penetrate the flange 2.
[0027] A clamping assembly 3 is arranged on the upper surface of the flange 2. The clamping assembly 3 can clamp the polished rod 1, thereby reducing the relative rotation of the polished rod 1 on the flange 2. An anti-rotation structure 4 is arranged on the clamping assembly 3. The anti-rotation structure 4 is inserted into the flange 2, and the rotation of the clamping assembly 3 is reduced through the anti-rotation structure 4, thereby restricting the rotation of the polished rod 1.
[0028] Refer to Figure 2 、 Figure 3, the clamping assembly 3 includes a first slip block 31 and a second slip block 32 which are oppositely arranged. The first slip block 31 and the second slip block 32 are symmetrically arranged along the axis of the optical rod 1. Clamping holes 33 are provided at the positions of the first slip block 31 and the second slip block 32 relative to the optical rod 1. When the first slip block 31 and the second slip block 32 are relatively fitted, the optical rod 1 is located inside the clamping holes 33 and the outer side wall of the optical rod 1 is in relative abutment with the first slip block 31 and the second slip block 32, and the optical rod 1 is clamped and fixed by the first slip block 31 and the second slip block 32.
[0029] Avoidance grooves 34 which are relatively communicated are provided at one ends of the first slip block 31 and the second slip block 32. A connecting block 35 is horizontally arranged inside the avoidance grooves 34. One end of the connecting block 35 is located inside the first slip block 31, and the other end of the connecting block 35 is located inside the second slip block 32.
[0030] One end of the connecting block 35 located inside the first slip block 31 is of a fillet structure and is rotatably connected to the first slip block 31 through a pin shaft. One end of the connecting block 35 located inside the second slip block 32 is of a fillet structure and is rotatably connected to the second slip block 32 through a pin shaft. Thus, the first slip block 31 and the second slip block 32 can relatively rotate through the provided connecting block 35, and the optical rod 1 is clamped inside the clamping holes 33.
[0031] A first avoidance hole 311 is provided at one end of the first slip block 31 away from the avoidance groove 34. A second avoidance hole 321 is provided at one end of the second slip block 32 away from the avoidance groove 34. The first avoidance hole 311 and the second avoidance hole 321 are relatively communicated, and one side of the second avoidance hole 321 away from the first avoidance hole 311 completely penetrates the side wall of the second slip block 32.
[0032] A screw rod 36 is rotatably connected inside the first avoidance hole 311 of the first slip block 31 through a pin shaft. The screw rod 36 can rotate into the second avoidance hole 321 and extend out from the second avoidance hole 321. A nut 37 is threadedly connected to the outer side wall of the screw rod 36 located outside the second slip block 32. The nut 37 is located at the part of the screw rod 36 outside the second slip block 32. The outer diameter of the nut 37 is greater than the width of the second avoidance hole 321, so that the side wall of the nut 37 can abut against the side wall of the second slip block 32. By rotating the nut 37, the side wall of the nut 37 is in relative abutment with the side of the second slip block 32 away from the first slip block 31, so as to position the screw rod 36 and clamp and fix the screw rod 36 on the second slip block 32.
[0033] One end of the nut 37 away from the first slip 31 is fixedly connected with a union 371. The union 371 is of a rectangular structure, and one end of the union 371 is provided with an extension rod 38. The length of the extension rod 38 is greater than the diameter of the flange 2, and a groove adapted to the union 371 is opened at one end of the extension rod 38 close to the union 371, so that the union 371 can extend into the interior of the groove.
[0034] Elastic balls 372 are arranged on the side wall of the union 371. The elastic balls 372 can retract into the interior of the union 371. A clamping groove is opened inside the extension rod 38 at the position where it is located in the groove. When the union 371 extends into the interior of the groove, the elastic balls 372 are opposite to the clamping groove, and the elastic balls 372 can extend into the interior of the clamping groove, thereby relatively limiting the extension rod 38 and the union 371. One end of the extension rod 38 away from the first slip 31 is fixedly connected with a handle, and the handle is fixedly connected to the extension rod 38.
[0035] By rotating the extension rod 38, the union 371 is driven to rotate, and then the nut 37 is driven to rotate, so as to adjust the relative position of the adjusting nut 37 on the screw rod 36.
[0036] The anti-rotation structure 4 includes a horizontally arranged handle 41. The handle 41 includes a first rod body 411 fixedly connected to the first slip 31 and a second rod body 412 fixedly connected to the second slip 32. The first rod body 411 and the second rod body 412 are coaxially arranged, and positioning through rods 42 are fixedly connected to the positions of the first rod body 411 and the second rod body 412 relative to the through hole 21. The positioning through rods 42 are vertically arranged and penetrate through the position of the through hole 21. The handle 41 is limited by the positioning through rods 42 to reduce the situation that the handle 41 rotates driven by the polished rod 1.
[0037] The implementation principle of the embodiment of the present application is as follows: By rotating the handle 41, the handle 41 drives the extension rod 38 to rotate, thereby driving the nut 37 to rotate, so that the nut 37 moves on the screw rod 36 toward the side away from the second slip 32. The screw rod 36 is rotated, so that the first slip 31 and the second slip 32 can rotate relatively. The first slip 31 and the second slip 32 are placed on the flange 2, and the polished rod 1 is passed through the clamping hole 33. The positioning through rod 42 is passed through the position of the through hole 21, and then the second slip 32 is rotated to clamp the polished rod 1 through the clamping hole 33. The screw rod 36 is rotated so that the screw rod 36 extends into the interior of the second avoidance hole 321, and the handle 41 is rotated so that the handle 41 drives the extension rod 38 and the nut 37 to rotate, and the nut 37 is abutted against the second slip 32 relatively. The screw rod 36 and the second slip 32 are relatively fixed through the nut 37, thereby clamping the polished rod 1.
[0038] In the present invention, the term "a plurality of" means at least two or more than two, unless otherwise clearly defined. Terms such as "mounted", "connected", "coupled", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
Claims
1. A screw pump polished rod anti-rotation device, comprising a polished rod (1), wherein a flange (2) is coaxially arranged on the polished rod (1), Features: A clamping assembly (3) is arranged on the flange (2) at a position relative to the light rod (1), and the clamping assembly (3) is capable of clamping the light rod (1). A handle (41) is horizontally arranged on the side wall of the clamping assembly (3). A through hole (21) is vertically opened on the flange (2). A positioning through rod (42) is fixedly connected to the handle (41) at a position relative to the through hole (21), and the positioning through rod (42) passes through the through hole (21).
2. According to claim 1, a screw pump polished rod anti-rotation device, Features: The clamping assembly (3) comprises a first cava block (31) and a second cava block (32) which are arranged opposite to each other. The first cava block (31) and the second cava block (32) are hingedly arranged. Clamping holes (33) are provided at positions of the first cava block (31) and the second cava block (32) which are opposite to the bare rod (1). The first cava block (31) and the second cava block (32) clamp the bare rod (1) through the clamping holes (33). The first cava block (31) and the second cava block (32) are provided with opening and closing structures.
3. According to claim 2, a screw pump polished rod anti-rotation device, Features: The opening and closing structure comprises a screw rod (36) hingedly connected to the first cava block (31); a first avoidance hole (311) is provided inside the first cava block (31) relative to the screw rod (36); a second avoidance hole (321) is provided in the second cava block (32) relative to the screw rod (36); the screw rod (36) is threadedly connected to a nut (37) on the outer side of the second cava block (32); the outer diameter of the nut (37) is greater than the width of the second avoidance hole (321); and the nut (37) can abut against the side wall of the second cava block (32).
4. According to claim 3, a screw pump polished rod anti-rotation device, Features: A flexible joint (371) is provided on the side of the nut (37) facing away from the second cava block (32), and the flexible joint (371) is fixedly connected to the nut (37). An extension rod (38) is plugged into one side of the flexible joint (371), and a groove is provided at one end of the extension rod (38) close to the flexible joint (371). The flexible joint (371) can extend into the interior of the groove, and the extension rod (38) drives the flexible joint (371) to rotate through the engagement of the groove with the flexible joint (371).
5. According to claim 4, a screw pump polished rod anti-rotation device, Features: The movable joint (371) is a rectangular structure, the groove is a rectangular groove body adapted to the movable joint (371), and the side wall of the movable joint (371) is provided with an elastic clamping piece, and a clamping groove is provided inside the groove of the extension rod (38) at a position relative to the elastic clamping piece, and when the movable joint (371) extends into the interior of the groove, the elastic clamping piece extends into the interior of the clamping groove.
6. According to claim 4, a screw pump polished rod anti-rotation device, Features: The length of the extension rod (38) is greater than the diameter of the flange (2).
7. According to claim 4, a screw pump polished rod anti-rotation device, Features: One end of the extension rod (38) away from the movable joint (371) is fixedly connected to a handle.
8. According to claim 1, a screw pump polished rod anti-rotation device, Features: The length of the handle (41) is greater than the diameter of the flange (2).
9. The device for preventing the smooth rod from rotating of a screw pump according to claim 1, Features: An avoidance groove (34) is respectively provided on one side of the first cava block (31) and the second cava block (32) which are relatively hinged, and a connecting block (35) is horizontally arranged inside the avoidance groove (34), one end of the connecting block (35) extends into the interior of the first cava block (31), and the other end of the connecting block (35) extends into the interior of the second cava block (32), and the connecting block (35) is rotatably connected to the first cava block (31) and the second cava block (32), respectively.
10. A screw pump polished rod anti-rotation device according to claim 9, Features: Both ends of the connecting block (35) are arc-shaped chamfered structures.