Anti-jacking oil pipe soft anchor
By designing a soft anchor to prevent tubing from being lifted, and utilizing a combination structure of casing, anchor claws, and double-layer rubber components, the problem of tubing lifting and displacement during downhole operations was solved, achieving stable tubing fixation and extending service life.
Patent Information
- Application Number
- CN202520242703.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-17
AI Technical Summary
During downhole operations, tubing is prone to being lifted, displaced, or ruptured due to external forces, affecting the stability of downhole equipment and the safety of the overall production system.
A soft anchor for preventing tubing from being topped out was designed, comprising a casing, anchor claws, slips, and double-layer rubber components. The elastic deformation of the double-layer rubber components and the drainage grooves increase the flow channel. Combined with the fixing structure of the slips and sleeve, the tubing is stably fixed downhole.
It effectively prevents tubing from lifting and shifting, reduces wear, extends tubing life, improves the stability and safety of downhole equipment, and reduces maintenance costs.
Smart Images
Figure CN223781418U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil pipe anti-overhead technology, and in particular to a soft anchor for oil pipe anti-overhead. Background Technology
[0002] Petroleum is a viscous, dark brown (sometimes greenish) liquid, often referred to as the "blood of industry." During oil extraction, tubing can be lifted by external forces, leading to tubing instability and potential damage to downhole equipment or production interruptions. Therefore, using a soft anchor to prevent tubing from being lifted is essential. This is because the soft anchor provides relatively stable support to the tubing string through its own anchoring action, balancing the axial forces generated by pressure changes within the tubing, reducing tubing expansion and contraction deformation, and ensuring the safe and stable operation of the tubing string. It also effectively reduces the stress and deformation of the tubing string, lowers wear and fatigue levels, extends tubing service life, reduces the frequency and cost of tubing replacement, and improves the economic efficiency of the oil well.
[0003] Tubing anchors are mostly classified into hydraulic, mechanical, and hydraulically expandable types. Hydraulically expandable anchors are the most common, typically consisting of an expansion mechanism and a fixing mechanism. The expansion mechanism uses the pressure difference of the fluid inside the tubing to drive the anchor claws to expand and contract. The fixing mechanism secures the tubing string within the casing, preventing the tubing from pushing upwards or downwards.
[0004] In oilfield development, downhole operations often involve the use of tubing, including various procedures such as oil production, water injection, gas lift, acid washing, casing pressure testing, leak prevention, and downhole workover. Due to the complex downhole environment and drastic pressure and temperature changes, the external stress and internal fluid pressure on the tubing can cause it to lift, shift, or even rupture, making its stability in the well vulnerable and consequently affecting the safety and stability of the entire oil and gas production system. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a soft anchor to prevent tubing from being lifted, displaced, or even ruptured during operation, which could threaten the stability of the tubing downhole.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a soft anchor for preventing oil pipe from being jacked up, comprising a casing, an anchor claw fixedly connected to the inner wall of the casing, a slip plate fixedly connected to one side of the outer wall of the anchor claw, and a fixing component provided on the inner wall of the slip plate;
[0007] The fixing component includes a double-layer rubber component. The outer wall of the double-layer rubber component is fixedly connected to the inner wall of the slip plate. A cavity is opened inside the double-layer rubber component. A drainage groove is opened inside the double-layer rubber component. An oil pipe is fixedly connected to the inner wall of the double-layer rubber component.
[0008] Furthermore, an oil pipe is fixedly connected to the inner wall of the double-layer rubber component, a washer is fixedly connected to one side of the outer wall of the oil pipe, an inner sleeve is fixedly connected to the outer wall of the washer, an outer sleeve is threadedly connected to the outer wall of the inner sleeve, and an anti-slip strip is fixedly connected to the outer wall of the outer sleeve.
[0009] Furthermore, a filter screen is fixedly connected inside the oil pipe, and the oil pipe is used to guide the transportation of oil.
[0010] Furthermore, an inner sleeve is fixedly connected inside the oil pipe, and a water eye is fixedly connected to the outer wall of the inner sleeve.
[0011] Furthermore, one end of the double-layer rubber component is fixedly connected to one end of the washer, and the washer serves to buffer and dampen shocks.
[0012] Furthermore, the outer wall of the double-layer rubber component is fixedly connected to the inner wall of the inner sleeve, and the inner sleeve is used to fix the double-layer rubber component.
[0013] Furthermore, the oil pipe is fixedly connected to the outer wall of the filter screen, and the filter screen together serves to filter out impurities.
[0014] Furthermore, a second filter screen is fixedly connected inside the oil pipe, and the second filter screen serves to filter out impurities.
[0015] Furthermore, a water eye is provided inside the oil pipe to guide the flow of liquid.
[0016] Furthermore, the inner wall of the sleeve is fixedly connected to the outer wall of the anti-slip strip, which is used to enhance the fixation of the double-layer rubber parts.
[0017] This utility model has the following beneficial effects:
[0018] 1. In this utility model, a cavity is opened in the middle of the double-layer rubber parts to achieve better elastic deformation of the double-layer rubber parts. At this time, a flow channel is opened on the outside of the double-layer rubber parts to increase the flow passage. At this time, a vulcanized slip plate is installed on the outside of the double-layer rubber parts to fix them in the double-layer rubber parts. At this time, the upper rubber parts are expanded by pressing to make the anchor claw stick to the sleeve wall, thereby preventing the oil pipe from rising.
[0019] 2. In this utility model, by installing a gasket on the outer wall of the oil pipe, the gasket can play a buffering and shock-absorbing role in subsequent use. At this time, by installing the inner sleeve on the outer wall of the gasket, the installation position of the outer sleeve is provided. The inner sleeve and the outer sleeve are connected together by threads. At the same time, the outer wall of the outer sleeve is equipped with anti-slip strips, thereby increasing the strength of the lower part and making it less prone to expansion under pressure, so as to achieve normal expansion under pressure at the upper part, and the overall shape is like a cup. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of a soft anchor for preventing oil pipe from jacking up, as proposed in this utility model.
[0021] Figure 2 This is a schematic diagram of the oil pipe section structure of an anti-overhead soft anchor proposed in this utility model;
[0022] Figure 3 This is a schematic diagram of the slip plate part of the anti-oil pipe soft anchor proposed in this utility model;
[0023] Figure 4 This is a schematic diagram of the inner sleeve structure of a soft anchor for preventing oil pipe from rotting, as proposed in this utility model.
[0024] Figure 5 for Figure 3 Enlarged view of point A in the image.
[0025] Legend:
[0026] 1. Sleeve; 2. Oil pipe; 3. Slip plate; 4. Anchor claw; 5. Double-layer rubber parts; 6. Cavity; 7. Drainage channel; 8. Water eye; 9. Filter screen one; 10. Washer; 11. Inner ferrule; 12. Outer ferrule; 13. Anti-slip strip; 14. Filter screen two. Detailed Implementation
[0027] 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.
[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5This utility model provides an embodiment of a soft anchor for preventing oil pipe from being pushed up, comprising a sleeve 1, which serves as the solid outer shell of the entire soft anchor. Anchor claws 4 are fixedly connected to the inner wall of the sleeve 1, and the anchor claws 4 are used to fix slip plates 3. Slip plates 3 are fixedly connected to one side of the outer wall of the anchor claws 4, and slip plates 3 serve as a connector. A fixing component is provided on the inner wall of the slip plates 3, and the fixing component includes a double-layer rubber component 5, which is used to fix the slip plates 3. The outer wall of the double-layer rubber component 5 is fixedly connected to the inner wall of the slip plates 3. A cavity 6 is opened inside the double-layer rubber component 5, which can effectively buffer the pressure when the oil pipe is subjected to pressure impact by its own elastic deformation space. The double-layer rubber component 5 has a flow channel 7 inside, which increases the flow passage of the double-layer rubber component 5. An oil pipe 2 is fixedly connected to the inner wall of the double-layer rubber component 5. A filter screen 9 is fixedly connected inside the oil pipe 2. The oil pipe 2 is used to guide the transport of oil. An inner sleeve 11 is fixedly connected inside the oil pipe 2. A water eye 8 is fixedly connected to the outer wall of the inner sleeve 11. The filter screen 9 is fixedly connected to the outer wall of the oil pipe 2. The filter screen 9 serves to filter impurities. A second filter screen 14 is fixedly connected inside the oil pipe 2. The filter screen 14 serves to filter impurities. A water eye 8 is opened inside the oil pipe 2. The water eye 8 is used to guide the flow of liquid.
[0029] Reference Figure 2 and Figure 4 An oil pipe 2 is fixedly connected to the inner wall of the double-layer rubber component 5. A washer 10 is fixedly connected to one side of the outer wall of the oil pipe 2. An inner sleeve 11 is fixedly connected to the outer wall of the washer 10. An outer sleeve 12 is threadedly connected to the outer wall of the inner sleeve 11. The outer sleeve 12 ensures that the components maintain their relative positions during operation, preventing components from loosening or shifting due to oil flow impact or external vibration, and ensuring the stability and reliability of the anti-overhead oil pipe soft anchor system. An anti-slip strip 13 is fixedly connected to the outer wall of the outer sleeve 12. One end of the double-layer rubber component 5 is fixedly connected to one end of the washer 10. The washer 10 plays a role in buffering and shock absorption. The outer wall of the double-layer rubber component 5 is fixedly connected to the inner wall of the inner sleeve 11. The inner sleeve 11 is used to fix the double-layer rubber component 5. The inner wall of the sleeve 1 is fixedly connected to the outer wall of the anti-slip strip 13. The anti-slip strip 13 is used to enhance the fixation of the double-layer rubber component 5.
[0030] Working principle: When using the anti-overhead soft anchor to fix the oil pipe, a vulcanized slip plate 3 is installed on the outside of the double-layer rubber component 5, thereby fixing the slip plate 3 inside the double-layer rubber component 5. The double-layer rubber component 5 has a hollow annular shape in the middle, and a fixing component is provided at the bottom of the double-layer rubber component 5. At this time, a gasket 10 is installed on the outer wall of the oil pipe 2, thereby effectively achieving a buffering and shock absorption effect in subsequent use. The inner sleeve 11 is installed on the outer wall of the gasket 10, and the outer sleeve 12 and the inner sleeve 11 are engaged. The threaded connection increases the strength of the lower part, allowing the upper part to expand under pressure, resulting in a cup-shaped overall shape. By pressing and expanding the upper rubber part of the double-layer rubber part 5, the anchor claw 4 is made to adhere to the wall of the casing 1, thus preventing the oil pipe from pushing up. The flow channel is increased by using a drainage groove 7 on the outside of the double-layer rubber part 5. The filter screen 1 9 and filter screen 2 14 are installed on the inner wall of the water eye 8 to prevent debris from entering the cavity 6.
[0031] 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 soft anchor for preventing oil pipe from jacking up, comprising a casing (1), characterized in that: An anchor claw (4) is fixedly connected to the inner wall of the sleeve (1), and a slip plate (3) is fixedly connected to one side of the outer wall of the anchor claw (4). A fixing component is provided on the inner wall of the slip plate (3). The fixing component includes a double-layer rubber component (5), the outer wall of which is fixedly connected to the inner wall of the slip plate (3), a cavity (6) is provided inside the double-layer rubber component (5), a drainage groove (7) is provided inside the double-layer rubber component (5), and an oil pipe (2) is fixedly connected to the inner wall of the double-layer rubber component (5).
2. The anti-oil pipe soft anchor according to claim 1, characterized in that: The inner wall of the double-layer rubber part (5) is fixedly connected to an oil pipe (2), and a washer (10) is fixedly connected to one side of the outer wall of the oil pipe (2). An inner sleeve (11) is fixedly connected to the outer wall of the washer (10), and an outer sleeve (12) is threadedly connected to the outer wall of the inner sleeve (11). An anti-slip strip (13) is fixedly connected to the outer wall of the outer sleeve (12).
3. The anti-oil pipe soft anchor according to claim 1, characterized in that: The oil pipe (2) is fixedly connected to a filter screen (9), and the oil pipe (2) is used to guide the transport of oil.
4. A soft anchor for preventing oil pipe from jacking up according to claim 3, characterized in that: The oil pipe (2) is fixedly connected to an inner sleeve (11), and the outer wall of the inner sleeve (11) is fixedly connected to a water eye (8).
5. A soft anchor for preventing oil pipe from jacking up according to claim 4, characterized in that: One end of the double-layer rubber component (5) is fixedly connected to one end of the washer (10), and the washer (10) plays the role of buffering and shock absorption.
6. A soft anchor for preventing oil pipe from jacking up according to claim 5, characterized in that: The outer wall of the double-layer rubber component (5) is fixedly connected to the inner wall of the inner sleeve (11), and the inner sleeve (11) is used to fix the double-layer rubber component (5).
7. A soft anchor for preventing oil pipe from jacking up according to claim 1, characterized in that: The oil pipe (2) is fixedly connected to the outer wall of the filter screen (9), which serves to filter out impurities.
8. A soft anchor for preventing oil pipe from jacking up according to claim 7, characterized in that: The oil pipe (2) is fixedly connected to a filter screen (14), which serves to filter out impurities.
9. A soft anchor for preventing oil pipe from jacking up according to claim 1, characterized in that: The oil pipe (2) has a water eye (8) inside, which is used to guide the flow of liquid.
10. A soft anchor for preventing oil pipe from jacking up according to claim 1, characterized in that: The inner wall of the sleeve (1) is fixedly connected to the outer wall of the anti-slip strip (13), which is used to enhance the fixation of the double-layer rubber part (5).