Limiting assembly for petroleum drilling piston rod

Abstract

The utility model relates to the technical field of piston rods, in particular to a petroleum drilling piston rod limiting assembly which comprises a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are rotationally connected in a threaded mode, a sealing sleeve is fixedly connected to the inner side of the first connecting rod, and a connecting screw cylinder is fixedly connected to the surface of the second connecting rod. And the surface of the second connecting rod is in threaded connection with an adjusting screw rod. Through the connection of the rotating groove and the rotating clamping ball and the fixed connection of the supporting baffle and the rotating clamping ball, the rotating connection effect of the supporting baffle on the adjusting screw rod is achieved, and under the change of the acting position of the supporting baffle, the limiting operation of the connection between the first connecting rod and the second connecting rod is completed; the quick locking performance of the connecting position is improved, the sealing connection operation between the first connecting rod and the second connecting rod is completed under the action of the sealing sleeve, and the sealing performance and effect of the connection are improved under the action of the shape of the sealing sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rods, in particular to a piston rod limiting component for oil drilling. Background Art

[0002] Oil drilling refers to the work of drilling a cylindrical hole of a certain diameter downward or to one side at a pre-selected surface location using special equipment and technology, and drilling into underground oil and gas layers.

[0003] The piston rod is a component used in oil drilling to achieve the effect of connection limit. However, when the existing piston rod is used, the piston rod does not have a limit mechanism. When connected, it is not easy to perform the connection operation at the specified position, which affects the efficiency of connection. Utility Model Content

[0004] The utility model aims to provide a petroleum drilling piston rod limit assembly to solve the problem in the above background technology that the piston rod has no limit mechanism, which makes it difficult to perform the connection operation at the specified position during connection and affects the connection efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a petroleum drilling piston rod limit assembly, comprising a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are threadedly connected to each other, a sealing sleeve is fixedly connected to the inner side of the first connecting rod, a connecting screw barrel is fixedly connected to the surface of the second connecting rod, an adjusting screw is threadedly connected to the surface of the second connecting rod, a control screw sleeve is fixedly connected to the outer surface of the adjusting screw, a rotating groove is provided on the surface of the adjusting screw, a rotating clamping ball is movably connected to the inner side of the rotating groove, and a support baffle is fixedly connected to the surface of the rotating clamping ball.

[0006] Preferably, the first connecting rod and the second connecting rod have the same shape, and the second connecting rod is threadedly connected to the first connecting rod via a connecting screw barrel.

[0007] Preferably, the cross-section of the sealing sleeve is triangular in shape, the sealing sleeve acts on the inner side of the first connecting rod, and the sealing sleeve and the connecting screw barrel are abutted and sleeved.

[0008] Preferably, the sealing sleeve is made of rubber, and the adjusting screws are evenly distributed on the side where the second connecting rod and the connecting screw barrel are in contact.

[0009] Preferably, a screw groove is provided on the contact surface between the second connecting rod and the adjusting screw, the adjusting screw is threadably connected to the second connecting rod via the screw groove, and the control screw sleeve acts on an end of the adjusting screw away from the second connecting rod.

[0010] Preferably, the rotating groove is in the shape of a spherical groove, and the rotating clamping ball is in the shape of a semi-spherical ball.

[0011] Preferably, the support baffle is in a block shape and acts on an end of the adjusting screw away from the second connecting rod, and the support baffle is rotatably connected to the adjusting screw through a rotating clamping ball and a rotating groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Through the connection between the second connecting rod and the connecting screw barrel, under the connection between the connecting screw barrel and the first connecting rod, the connection operation between the first connecting rod and the second connecting rod is realized. Under the connection between the adjusting screw and the second connecting rod, through the connection between the rotating groove and the rotating clamping ball, the fixed connection between the support baffle and the rotating clamping ball is realized to realize the rotational connection effect of the support baffle on the adjusting screw. Under the change of the action position of the support baffle, the limiting operation of the connection between the first connecting rod and the second connecting rod is completed, thereby improving the rapid locking performance of the connection position.

[0014] 2. Through the connection between the first connecting rod and the sealing sleeve, under the connection between the connecting screw barrel and the first connecting rod, the abutting connection effect between the connecting screw barrel and the sealing sleeve is achieved, and the sealing connection operation between the first connecting rod and the second connecting rod is completed through the action of the sealing sleeve. Through the shape of the sealing sleeve, the sealing performance and effect of the connection are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view stereoscopic schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a partial cross-sectional three-dimensional schematic diagram of the structure of the utility model;

[0017] Figure 3 It is a partially cutaway perspective schematic diagram of the structure of the first connecting rod of the utility model;

[0018] Figure 4 It is a structural stereoscopic schematic diagram of the second connecting rod of the utility model;

[0019] Figure 5 For this utility model Figure 4 A partial three-dimensional schematic diagram of the structure of the middle adjusting screw.

[0020] In the figure: 1. first connecting rod; 2. second connecting rod; 3. sealing sleeve; 4. connecting screw barrel; 5. adjusting screw; 6. control screw sleeve; 7. rotating groove; 8. rotating card ball; 9. supporting baffle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 , an embodiment provided by the utility model:

[0023] A petroleum drilling piston rod limit assembly comprises a first connecting rod 1 and a second connecting rod 2, the first connecting rod 1 and the second connecting rod 2 are threadedly connected, a sealing sleeve 3 is fixedly connected to the inner side of the first connecting rod 1, a connecting screw barrel 4 is fixedly connected to the surface of the second connecting rod 2, an adjusting screw 5 is threadedly connected to the surface of the second connecting rod 2, a control screw sleeve 6 is fixedly connected to the outer surface of the adjusting screw 5, a rotating groove 7 is opened on the surface of the adjusting screw 5, a rotating clamping ball 8 is movably connected to the inner side of the rotating groove 7, and a supporting baffle 9 is fixedly connected to the surface of the rotating clamping ball 8. Through the connection between the second connecting rod 2 and the connecting screw barrel 4, under the action of the connecting screw barrel 4, the connection effect between the first connecting rod 1 and the second connecting rod 2 is achieved, and under the abutment connection between the sealing sleeve 3 and the connecting screw barrel 4, the sealing connection effect between the first connecting rod 1 and the second connecting rod 2 is achieved.

[0024] Furthermore, the first connecting rod 1 and the second connecting rod 2 have the same shape, and the second connecting rod 2 is threadedly connected to the first connecting rod 1 through the connecting screw barrel 4. Through the connection between the second connecting rod 2 and the connecting screw barrel 4, under the action of the connecting screw barrel 4, the threaded connection effect between the first connecting rod 1 and the second connecting rod 2 is achieved.

[0025] Furthermore, the cross-section of the sealing sleeve 3 is triangular in shape, and the sealing sleeve 3 acts on the inner side of the first connecting rod 1. The sealing sleeve 3 and the connecting screw barrel 4 are abutted and sleeved together. Through the connection between the sealing sleeve 3 and the first connecting rod 1, under the action of the sealing sleeve 3, the abutting sealing effect of the connecting screw barrel 4 acting in the first connecting rod 1 is achieved.

[0026] Furthermore, the sealing sleeve 3 is made of rubber, and the adjusting screw 5 is evenly distributed on the side in contact with the second connecting rod 2 and the connecting screw barrel 4. Through the connection between the adjusting screw 5 and the second connecting rod 2, under the action of the adjusting screw 5, a limiting control effect of the connection distance between the first connecting rod 1 and the second connecting rod 2 is achieved.

[0027] Furthermore, a screw groove is provided on the contact surface between the second connecting rod 2 and the adjusting screw 5, and the adjusting screw 5 is threadably connected to the second connecting rod 2 via the screw groove. The control screw sleeve 6 acts on the end of the adjusting screw 5 away from the second connecting rod 2. Through the connection between the adjusting screw 5 and the control screw sleeve 6, under the action of the control screw sleeve 6, it is convenient to rotate the adjusting screw 5 in the screw groove, thereby changing the effective length of the adjusting screw 5 on the second connecting rod 2 and improving its performance and effect.

[0028] Furthermore, the rotating groove 7 is in the shape of a spherical groove, and the rotating clamping ball 8 is in the shape of a semi-spherical ball. Through the connection between the rotating groove 7 and the rotating clamping ball 8, under the action of the rotating groove 7, the rotating clamping ball 8 can achieve the rotation effect on the adjusting screw 5.

[0029] Furthermore, the support baffle 9 is in a block shape and acts on one end of the adjusting screw 5 away from the second connecting rod 2. The support baffle 9 is rotatably connected to the adjusting screw 5 through a rotating clamping ball 8 and a rotating groove 7. Under the connection between the support baffle 9 and the rotating clamping ball 8, the rotating connection of the rotating clamping ball 8 and the rotating groove 7 realizes the rotation effect of the support baffle 9 on the adjusting screw 5.

[0030] Working principle: When the first connecting rod 1 and the second connecting rod 2 are connected, the first connecting rod 1 and the second connecting rod 2 are threadedly connected through the connection between the connecting screw barrel 4 and the second connecting rod 2. Under the connection of the adjusting screw 5 and the second connecting rod 2, the rotating ball 8 and the support baffle 9 are connected, and the rotating connection between the rotating ball 8 and the adjusting screw 5 changes the action angle of the support baffle 9 on the adjusting screw 5, thereby achieving the effect of limiting the connection position between the first connecting rod 1 and the second connecting rod 2. Under the abutment connection between the sealing sleeve 3 and the connecting screw barrel 4, the sealing performance of the connection between the first connecting rod 1 and the second connecting rod 2 is improved.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A petroleum drilling piston rod limit assembly, comprising a first connecting rod (1) and a second connecting rod (2), characterized in that: The first connecting rod (1) and the second connecting rod (2) are connected in a threaded manner. A sealing sleeve (3) is fixedly connected to the inner side of the first connecting rod (1). A connecting screw barrel (4) is fixedly connected to the surface of the second connecting rod (2). An adjusting screw (5) is threadedly connected to the surface of the second connecting rod (2). A control screw sleeve (6) is fixedly connected to the outer surface of the adjusting screw (5). A rotating groove (7) is provided on the surface of the adjusting screw (5). A rotating locking ball (8) is movably connected to the inner side of the rotating groove (7). A supporting baffle (9) is fixedly connected to the surface of the rotating locking ball (8).

2. The oil drilling piston rod limiting assembly according to claim 1, characterized in that: The first connecting rod (1) and the second connecting rod (2) have the same shape, and the second connecting rod (2) is threadedly connected to the first connecting rod (1) via a connecting screw barrel (4).

3. The oil drilling piston rod limiting assembly according to claim 1, characterized in that: The sealing sleeve (3) has a triangular cross-section. The sealing sleeve (3) acts on the inner side of the first connecting rod (1). The sealing sleeve (3) and the connecting screw barrel (4) are in abutment and sleeve connection.

4. The oil drilling piston rod limiting assembly according to claim 1, characterized in that: The sealing sleeve (3) is made of rubber, and the adjusting screw (5) is evenly distributed on the side where the second connecting rod (2) and the connecting screw barrel (4) are in contact.

5. The oil drilling piston rod limiting assembly according to claim 1, characterized in that: A screw groove is provided on the contact surface between the second connecting rod (2) and the adjusting screw (5); the adjusting screw (5) is threadably connected to the second connecting rod (2) via the screw groove; and the control screw sleeve (6) acts on the end of the adjusting screw (5) away from the second connecting rod (2).

6. The oil drilling piston rod limit assembly according to claim 1, characterized in that: The rotating groove (7) is in the shape of a spherical groove, and the rotating clamping ball (8) is in the shape of a semi-spherical ball.

7. The oil drilling piston rod limiting assembly according to claim 1, characterized in that: The support baffle (9) is in a block shape and acts on one end of the adjusting screw (5) away from the second connecting rod (2). The support baffle (9) is rotatably connected to the adjusting screw (5) through a rotating clamping ball (8) and a rotating groove (7).

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