Combined type three-petal clamping block for improving circumferential stress distribution of coiled tubing

Abstract

The utility model discloses a combined type three-section clamping block for improving circumferential stress distribution of a continuous pipe. The combined type three-section clamping block comprises a clamping block base, a first clamping piece and a second clamping piece. The middle of the inner side of the base is connected with the transverse fixing boss of the first clamping piece in a clamped mode through a transverse fixing groove, and the two sides of the base are matched with the lateral fixing bosses of the second clamping piece through lateral fixing grooves and fixed through bolts. A U-shaped groove is formed in the bottom of the base and can be extruded and deformed inwards under hydraulic thrust, the three clamping pieces are driven to be tightened synchronously, the rubber layers of the clamping bosses make close contact with the surface of the continuous pipe, and clamping force is evenly dispersed. According to the split type continuous pipe, the circumferential stress distribution of the continuous pipe is optimized through the split type design, the abrasion rate of the pipe body is reduced, meanwhile, quick disassembly and maintenance are facilitated through the modular structure, and the operation efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of continuous tube operation technology, and in particular to a combined three-lobed clamping block for improving the circumferential force distribution of continuous tubes. Background Technology

[0002] In coiled tubing operations in the oil and gas energy industries, clamping and securing the coiled tubing is a crucial step. The injection head coiled tubing clamping device is a key component of the coiled tubing operation equipment. It is driven by a hydraulic motor that rotates in both directions, which drives a sprocket to work. The clamping components between the chain links clamp the coiled tubing, causing it to move together with the chain, thus enabling the coiled tubing to enter and exit the well.

[0003] Existing clamping blocks mostly adopt a one-piece design, which results in uneven contact area during clamping, leading to localized stress concentration in the continuous pipe. This causes wear, deformation, or damage to the pipe, affecting the safety and efficiency of the operation. Furthermore, one-piece clamping blocks are cumbersome to replace and maintain, increasing operating costs and time. Therefore, developing a clamping device that can evenly distribute force and reduce pipe damage is of great significance. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a combined three-lobed clamping block for improving the circumferential force distribution of continuous pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a combined three-lobed clamping block for improving the circumferential force distribution of a continuous pipe, comprising a base and clamping plates. A first clamping plate is connected to the center of the base, and second clamping plates are connected to the left and right sides of the base. The clamping plates are connected to the base through bosses and grooves. The second clamping plates are bolted to the left and right sides of the base. An installation groove is provided at the bottom of the base, and a U-shaped groove is provided inside the installation groove. Both the first and second clamping plates are provided with multiple clamping grooves.

[0006] This utility model has the following beneficial effects:

[0007] In this invention, the base of the clamping block is first connected to the bracket in the injection head sprocket system, and the continuous tube is located on the clamping protrusion of the clamping block. The injection head drive system increases the thrust, which pushes the base, the first clamping plate and the second clamping plate to clamp the continuous tube while improving the distribution of circumferential force on the continuous tube.

[0008] In this utility model, a fixing groove is provided on the base of the clamping block, a fixing boss is provided on the clamping plate, and an installation buckle is provided on the back of the base. The structural design of the combined clamping block also facilitates disassembly and replacement in the later stage. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, as proposed in this utility model.

[0010] Figure 2 This is a front view of the base of a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, as proposed in this utility model.

[0011] Figure 3 This is a cross-sectional view of the base of a combined three-lobed clamping block for improving the circumferential force distribution of a continuous pipe, as proposed in this utility model.

[0012] Figure 4 This is a front view of the first clamping piece in a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, as proposed in this utility model.

[0013] Figure 5 This is a right view of the first clamping piece in a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, as proposed in this utility model.

[0014] Figure 6 This is a front view of the second clamping piece in a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, as proposed in this utility model.

[0015] Figure 7 This is a left view of the second clamping piece in a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, as proposed in this utility model.

[0016] Legend:

[0017] 1. Base; 2. First clamping piece; 3. Second clamping piece; 4. Bolt; 5. Rib; 6. Weight reduction groove; 7. Buckle; 8. Clamping groove; 9. Clamping boss; 10. U-shaped groove; 11. Lateral fixing groove; 12. Lateral fixing groove; 13. Threaded hole; 14. Lateral fixing boss; 15. Lateral fixing boss. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0020] like Figures 1 to 7 As shown, one embodiment of this utility model is a combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, including a base 1, a first clamping piece 2, and a second clamping piece 3. The first clamping piece 2 is connected to the bottom surface inside the base 1, and the second clamping piece 3 is symmetrically arranged on an inclined surface inside the base 1. The bottom of the first clamping piece 2 is provided with a transverse fixing boss 14, which forms a snap-fit ​​connection with the transverse fixing groove 11 on the bottom surface of the base. The lateral fixing boss 15 on the vertical plane of the second clamping piece 3 cooperates with the lateral fixing groove 12 on the vertical plane of the base and is connected by bolts 4. The bottom of the base 1 is provided with a U-shaped groove 10, which is squeezed and deformed inward when subjected to the hydraulic thrust of the injection head, so that the first clamping piece and the second clamping piece wrap around the continuous tube.

[0021] Working principle: The base is fixed to the injection head sprocket bracket by installing buckle 7. The transverse fixing boss 14 of the first clamping piece 2 is aligned with the transverse fixing groove 11 of the base 1 and pressed vertically to complete the engagement. The lateral fixing boss 15 of the second clamping piece 3 is inserted into the lateral fixing groove 12 of the base and tightened with bolt 4. The hydraulic system of the injection head pushes the base 1 to move towards the continuous tube. The U-shaped groove 10 is deformed by pressure, driving the first clamping piece 2 and the left and right second clamping pieces 3 to tighten synchronously. The rubber layer of the clamping boss 9 is in close contact with the surface of the continuous tube, and the clamping force in the circumferential direction of the oil tube is evenly distributed.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube, comprising a base (1), a first clamping piece (2), and a second clamping piece (3), characterized in that: The base (1) has a transverse fixing groove (11) in the middle of its inner side, which is engaged with the transverse fixing boss (14) at the bottom of the first clamping piece (2). The base (1) has symmetrical lateral fixing grooves (12) on both sides, which cooperate with the lateral fixing boss (15) of the second clamping piece (3) and are fixed by bolts (4). The base (1) has a U-shaped groove (10) at the bottom, which is used to squeeze and deform inward under hydraulic thrust, driving the clamping piece to wrap the continuous tube.

2. The combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 1, characterized in that: The base (1) has a U-shaped groove (10) on its bottom surface. The first clamping piece (2) and two second clamping pieces (3) are distributed around the continuous tube in the circumferential direction. When the U-shaped groove (10) is deformed by pressure, it is driven by the base (1) to be synchronously tightened radially, thereby uniformly applying clamping force to the circumferential direction of the continuous tube.

3. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 1, characterized in that: The base (1) has a transverse fixing groove (11) in the middle of its inner side and a lateral fixing groove (12) on its side for connecting the clamping piece.

4. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 1, characterized in that: The base (1) has a weight reduction groove (6) on its side to meet the lightweight design of the injection head.

5. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 1, characterized in that: The bottom surface of the first clamping piece (2) is provided with a horizontal fixing boss (14) for connecting with the base.

6. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 1, characterized in that: The second clamping piece (3) has a lateral fixing boss (15) on its bottom surface for connecting with the base.

7. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 1, characterized in that: The first clamping piece (2) and the second clamping piece (3) are provided with multiple clamping grooves (8) and clamping protrusions (9) on their surfaces.

8. A combined three-lobed clamping block for improving the circumferential force distribution of a continuous tube according to claim 7, characterized in that: The clamping boss (9) is embedded with a wear-resistant rubber layer to increase friction with the continuous tube and reduce scratches.

9. The combined three-lobed clamping block according to claim 1, characterized in that: The base (1) has a mounting buckle (7) on the back for quick connection with the bracket of the injection head sprocket system.

Images