Novel anti-torque connector of sucker rod

Abstract

The utility model discloses a novel anti-torque connector of a sucker rod, which comprises an upper connector of the sucker rod, an upper threaded groove is arranged on the circumferential surface of the bottom of the upper connector of the sucker rod, a polygonal column is arranged at a port of the bottom of the upper connector of the sucker rod, and an inner fixing hole is arranged in the middle of the polygonal column. A lower threaded groove is formed in the circumferential surface of the upper end of the sucker rod lower connector, a polygonal cylinder groove is formed in the top of the sucker rod lower connector, outer fixing holes are formed in the two sides, directly facing the inner fixing holes, of the polygonal cylinder groove, and the outer fixing holes penetrate through the polygonal cylinder groove; the fixing block is arranged between the inner fixing hole and the outer fixing hole in a penetrating manner; and the sleeve is screwed on the outer surface of the connecting end of the sucker rod upper joint and the sucker rod lower joint. Due to the fact that the anti-torque characteristic is added to the sucker rod connector, when the sucker rod connector is stressed, the anti-torque polygonal column and the fixing block are arranged in the sucker rod connector to fix the sucker rod, meanwhile, the sleeve is additionally arranged to protect the fixing connector, and the torque force borne by the sucker rod connector is further reduced.

Description

Technical Field

[0001] The utility model belongs to the application field of sucker rods in the petroleum industry, in particular to a novel sucker rod torque-resistant joint. Background Art

[0002] In oil well collection, the sucker rod is used as a carrier to transmit force to drive the oil pump buried deep underground to pump oil. The direction of drilling the oil well deep underground is not always vertically downward, but extends downward at different angles. Therefore, a multi-section sucker rod is often placed in the well when oil is collected. In the prior art, the sucker rod is often connected in multiple sections, so the sucker rod not only bears the traction force from the vertical direction, but also the torsional torque force applied to the sucker rod by the oil wall. When the torque force is large, the sucker rod joint will break and fall off.

[0003] For example, patent application number CN210118102U discloses a torsion-resistant and anti-detachment sucker rod, in which the plug-in end of the sucker rod is connected to the adjacent sucker rod receiving end, and a locking pin is passed through and fixed at the connection for connection. However, the sucker rod lacks a structure to enhance the tightness of the sucker rod joint, so that the plug-in end in the shape of a rectangular cube has weak torque resistance when subjected to a large torsional force, and is prone to torsional deformation or even breaking, so the sucker rod joint end cannot withstand the torsional force well. Utility Model Content

[0004] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described below.

[0005] In order to achieve these purposes and other advantages according to the utility model, there is provided a method comprising:

[0006] The sucker rod upper joint has an upper threaded groove on its bottom circumferential surface, a polygonal column is provided at the bottom port of the sucker rod upper joint, and an inner fixing hole penetrating the polygonal column is provided in the middle of the polygonal column;

[0007] A sucker rod lower joint, the upper circumferential surface of which is provided with a lower thread groove, a polygonal column groove matching the polygonal column is provided at the top of the sucker rod lower joint, and external fixing holes with the same aperture size as the internal fixing holes are provided on both sides of the polygonal column groove facing the internal fixing hole, and the external fixing holes penetrate the polygonal column groove;

[0008] A fixing block, which is inserted between the inner fixing hole and the outer fixing hole;

[0009] The sleeve is threadedly connected to the outer surface of the connecting end of the upper joint of the sucker rod and the lower joint of the sucker rod.

[0010] Preferably, the outer diameter of the upper thread groove end portion and the outer diameter of the lower thread groove end portion are set to be the same size.

[0011] Preferably, the upper thread groove and the lower thread groove are configured so that the thread groove interfaces are continuous and the groove diameters are the same.

[0012] Preferably, the fixing block is transversely placed between the inner fixing hole and the outer fixing hole, and the horizontal length of the positioning block is smaller than the circular diameter of the screw peak of the inner ring of the sleeve.

[0013] Preferably, a limiting platform is provided at the upper end of the sucker rod lower joint, and the limiting platform is in contact with the bottom of the sleeve.

[0014] The utility model at least has the following beneficial effects:

[0015] The utility model re-arranges the sucker rod joint structure, connects the polygonal column on the sucker rod joint with the polygonal column groove by docking, and then inserts a fixing block into the polygonal column and the polygonal column groove, thereby enhancing the torsional torque resistance of the sucker rod joint, and at the same time tightly locks the fixing block in the polygonal column and the polygonal column groove, and further fixes the sucker rod joint by externally arranging a sleeve at the sucker rod joint, thereby further protecting the sucker rod joint from the torsional torque force of the oil well pipe wall while protecting the connection end structure, thereby enhancing the stability of the sucker rod joint.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a new type of sucker rod torque-resistant joint;

[0018] Figure 2 It is the lower joint and fixing block of the sucker rod;

[0019] Figure 3 It is the lower joint and fixing block of the sucker rod;

[0020] Figure 4 This is the general assembly drawing of the sucker rod joint. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0025] In addition, in the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] like Figures 1 to 4 As shown, a novel sucker rod torque-resistant joint comprises:

[0027] The sucker rod upper joint 1 has an upper thread groove 6 on its bottom circumferential surface, a polygonal column 5 is provided at the bottom port of the sucker rod upper joint 1, and an inner fixing hole 7 penetrating the polygonal column 5 is provided in the middle of the polygonal column 5;

[0028] The sucker rod lower joint 2 has a lower thread groove 8 on its upper circumferential surface, a polygonal column groove 9 matching the polygonal column 5 is provided on the top of the sucker rod lower joint 2, and external fixing holes 10 having the same aperture size as the internal fixing hole 7 are provided on both sides of the polygonal column groove 9 facing the internal fixing hole 7, and the external fixing hole 10 passes through the polygonal column groove 9;

[0029] A fixing block 3 is inserted between the inner fixing hole 7 and the outer fixing hole 10;

[0030] The sleeve 4 is threadedly connected to the outer surface of the connecting end of the upper joint 1 and the lower joint 2 of the sucker rod.

[0031] Working principle: a polygonal column 5 is provided at the bottom of the sucker rod upper joint 1, and a polygonal column groove 9 is provided at the upper end of the sucker rod lower joint 2. When the polygonal column 5 is placed in the polygonal column groove 9, the inner fixing hole 7 is directly opposite to the outer fixing holes 10 on both sides, and the fixing block 3 is inserted into the inner fixing hole 7 and the outer fixing hole 10. At this time, the sucker rod upper joint 1 is fixedly connected with the sucker rod lower joint 2, and the sleeve 4 is spirally connected to the upper thread groove 6 and the lower thread groove 8 from top to bottom in sequence, and the sucker rod joint is further fixed. Through the above connection method, the stability and firmness of the sucker rod joint are enhanced, and the torsional torque resistance of the sucker rod joint is improved. At the same time, the sleeve 4 locks the fixing block 3 in the inner fixing hole 7 and the outer fixing hole 10, which enhances the structural stability. At the same time, the sucker rod joint end is not affected by the torsional torque force applied by the oil well pipe wall, which enhances the torque resistance of the sucker rod joint.

[0032] In the above technical solution, the outer diameter of the end of the upper thread groove 6 and the outer diameter of the end of the lower thread groove 8 are set to be the same. Through the above setting, the influence of the outer diameter of the sucker rod joint on the screw connection of the sleeve 4 to the sucker rod joint is avoided.

[0033] In the above technical solution, the upper thread groove 6 and the lower thread groove 8 are arranged so that the thread groove interface is continuous and the groove diameter is the same. Through the above arrangement, the sleeve 4 can be smoothly threaded on the outer surface of the sucker rod joint.

[0034] In the above technical solution, when the fixing block 3 is horizontally placed in the inner fixing hole 7 and the outer fixing hole 10, the horizontal length of the positioning block 3 is smaller than the circular diameter of the inner thread peak of the sleeve 4. Through the above arrangement, it is avoided that the fixing block 3 protrudes out of the outer fixing hole 10 due to excessive horizontal length, thereby affecting the sleeve 4 threaded connection with the sucker rod joint.

[0035] In the above technical solution, a limit platform 11 is provided at the upper end of the sucker rod lower joint 2, and the limit platform 11 is in contact with the bottom of the sleeve 4. Through the above arrangement, it is avoided that the torsional torque force applied by the oil well pipe wall causes the sleeve 4 to rotate excessively and thus damage the sleeve 4 cylinder.

[0036] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A new type of sucker rod torque-resistant joint, characterized in that: include: The sucker rod upper joint has an upper threaded groove on its bottom circumferential surface, a polygonal column is provided at the bottom port of the sucker rod upper joint, and an inner fixing hole penetrating the polygonal column is provided in the middle of the polygonal column; A sucker rod lower joint, the upper circumferential surface of which is provided with a lower thread groove, a polygonal column groove matching the polygonal column is provided at the top of the sucker rod lower joint, and external fixing holes with the same aperture size as the internal fixing holes are provided on both sides of the polygonal column groove facing the internal fixing hole, and the external fixing holes penetrate the polygonal column groove; A fixing block, which is inserted between the inner fixing hole and the outer fixing hole; The sleeve is threadedly connected to the outer surface of the connecting end of the upper joint of the sucker rod and the lower joint of the sucker rod.

2. The novel sucker rod torque-resistant joint according to claim 1 is characterized in that: The outer diameter of the upper thread groove end portion and the outer diameter of the lower thread groove end portion are both set to be the same size.

3. The novel sucker rod torque-resistant joint according to claim 1 is characterized in that: The upper thread groove and the lower thread groove are configured so that the thread groove interfaces are continuous and the groove diameters are the same.

4. The novel sucker rod torque-resistant joint according to claim 1 is characterized in that: When the fixing block is transversely placed in the inner fixing hole and the outer fixing hole, the horizontal length of the fixing block is smaller than the circular diameter of the screw peak of the inner ring of the sleeve.

5. The novel sucker rod torque-resistant joint according to claim 1 is characterized in that: A limiting platform is arranged at the upper end of the lower joint of the sucker rod, and the limiting platform is abutted against and connected to the bottom of the sleeve.

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