A reusable in-hole plug packer

Abstract

This utility model discloses a reusable in-hole plug packer, belonging to the field of packer technology. It includes a vertical rod, with a second sleeve fitted onto the upper part of the outer wall of the rod. A longitudinal limiting groove is formed on the inner wall of the second sleeve, and a transverse limiting groove is formed on one side below the longitudinal limiting groove, with the longitudinal and transverse limiting grooves communicating with each other. A fixing plate is fixedly connected to the bottom of the second sleeve, and deflection rods are rotatably connected to all four sides of the fixing plate. Torsion springs are rotatably connected to both sides of the deflection rods. This reusable in-hole plug packer uses the deflection rods to drive the side plates to unfold, and the fixing pins form multi-point distributed anchoring, effectively avoiding the problem of dispersed force points caused by irregular hole walls. The elastic support of the torsion springs gives the side plates a certain degree of self-adjustment capability, ensuring tight contact between the fixing pins and the hole wall, improving overall fixing strength, and effectively preventing axial displacement and packer position deviation during high-pressure operations.

Description

Technical Field

[0001] This utility model relates to the field of packer technology, specifically a reusable in-hole plug packer. Background Technology

[0002] An in-hole plug packer is a precision downhole tool used for temporary, retrievable packing within a borehole. Its core function is to drive the internal sealing element (usually a rubber sleeve) to expand radially through mechanical or hydraulic means, thereby forming a high-pressure sealing barrier between the borehole wall or casing wall, effectively isolating the target well section. The tool mainly consists of a mandrel, anchoring mechanism, expansion rubber sleeve, and setting / unsetting mechanism. During operation, it is lowered to the designated depth by surface delivery tools or hydraulic control, and then the setting process is activated by ball pressurization, mechanical lifting, or cable energization.

[0003] For example, patent CN101761332B discloses a device for verifying the sealing of a pipe jacking column. A connecting hole is provided on the lower connector of an expansion packer. A sealing sleeve is fitted onto the lower connector of the expansion packer, covering the connecting hole. An outer sealing ring is located between the lower connector of the expansion packer and the sealing sleeve. The upper conical opening of the sealing sleeve mates with the outer conical surface of the lower connector of the expansion packer. A connector is installed at the lower part of the lower connector of the expansion packer. A constant pressure spring is located between the sealing sleeve and the connector. A sliding sleeve is installed inside the lower connector of the expansion packer. An upper sealing ring is installed on the upper outer wall of the sliding sleeve, and a lower sealing ring is installed on the lower outer wall of the sliding sleeve. The upper sealing ring is above the pressure transmission hole, and the lower sealing ring is below the connecting hole. The sliding sleeve is fixed to the lower connector of the expansion packer by a pin, and a valve ball sits on the upper port of the sliding sleeve.

[0004] However, when using existing devices, irregular hole walls can cause the force points of the slips to be dispersed, and some slips may not be able to effectively contact the hole wall, resulting in a localized engagement state. Ultimately, this leads to insufficient overall fixing strength of the packer, making it prone to axial displacement during high-pressure operations, and even causing the packer position to shift. Furthermore, although some mechanical slip packers are equipped with simple pressure-applying airbags for auxiliary sealing, these airbags are mostly single-layer thin rubber structures, and they only expand slightly through the accompanying pressure when the slips are fixed. This makes them unsuitable for irregular hole wall areas, easily forming sealing gaps, leading to problems such as fluid cross-contamination and pressure leakage, which seriously affect operational accuracy and safety.

[0005] Therefore, to address this problem, we propose a reusable in-hole plug packer. Utility Model Content

[0006] The purpose of this invention is to provide a reusable in-hole plug packer to solve the problems mentioned in the background art. When using existing devices, irregular hole walls cause the force points of the slips to be dispersed, and some slips cannot effectively contact the hole wall, resulting in a localized interlocking state. Ultimately, this leads to insufficient overall fixing strength of the packer, which is prone to axial displacement during high-pressure operations and may even cause the packer position to shift. Furthermore, although some mechanical slip packers are equipped with simple pressure airbags for auxiliary sealing, these airbags are mostly single-layer thin rubber structures and only expand slightly through the accompanying pressure when the slips are fixed. They cannot adapt to irregular hole wall areas, easily forming sealing gaps, leading to problems such as fluid cross-contamination and pressure leakage, which seriously affect the accuracy and safety of operations.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a reusable in-hole plug packer, comprising a vertical rod, a limiting ball fixedly connected to the outer wall of the vertical rod, a second sleeve sleeved above the outer wall of the vertical rod, a longitudinal limiting groove formed on the inner wall of the second sleeve, a transverse limiting groove formed on one side below the longitudinal limiting groove of the inner wall of the second sleeve, and the longitudinal limiting groove and the transverse limiting groove being connected, a fixing plate fixedly connected to the bottom of the second sleeve, deflecting rods rotatably connected around the fixing plate, torsion springs rotatably connected to both sides of the deflecting rods, side plates fixedly connected to the deflecting rods, and fixing pins uniformly fixedly connected to the outer wall of the side plates.

[0008] Furthermore, the radii of the limiting ball, the longitudinal limiting groove, and the transverse limiting groove are the same, and the upright and the second sleeve are connected by the limiting ball, the longitudinal limiting groove, and the transverse limiting groove.

[0009] Furthermore, a handle is fixedly connected to the top of the pole, and anti-slip grooves are evenly distributed on the outer wall of the handle.

[0010] Furthermore, a compression plate is fixedly connected to the bottom of the upright, and air bladders are evenly fitted onto the outer wall of the upright. Liquid bladders are fixedly connected to the outer wall of the air bladders, and the air bladders and liquid bladders are located above the compression plate.

[0011] Furthermore, a first sleeve is fitted onto the outer wall of the upright, and the bottom of the first sleeve is fixedly connected to the top of the airbag. The top of the first sleeve is evenly provided with mounting grooves, and a telescopic rod is fixedly connected in the mounting grooves. A spring is fitted onto the outer wall of the telescopic rod, and an inclined block is fixedly connected to the top of the telescopic rod.

[0012] Furthermore, a connecting plate is fixedly connected to the outer wall of the second sleeve, and pins are evenly and movably connected to the connecting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: a reusable in-hole plug packer, adopting a novel structural design, the specific details of which are as follows: (1) The reusable in-hole plug packer unfolds the side plate through the deflection rod and forms a multi-point distributed anchoring with the fixing pin. Compared with the traditional slip structure, it can effectively avoid the problem of force point dispersion caused by irregular hole wall. The elastic support of the torsion spring enables the side plate to have a certain self-adjustment capability, ensuring that the fixing pin is in close contact with the hole wall and improving the overall fixing strength. In high-pressure operation, it can effectively prevent axial displacement and packer position deviation. The auxiliary reinforcement design of the connecting plate and the pin further enhances the device's impact resistance and anti-movement capability. It is suitable for deep well and high-pressure well operations under complex geological conditions, and broadens the application range of the device.

[0014] (2) The reusable in-hole plug packer can achieve basic sealing through the elastic expansion of the air bladder. The liquid bladder on the outer wall can fill the gap of the hole wall with high viscosity sealing liquid, which is suitable for irregular areas of the hole wall. Compared with the traditional single-layer thin rubber air bladder, the sealing coverage will be improved, which solves the problems of fluid cross-layering and pressure leakage caused by the sealing gap, and ensures the accuracy and safety of operation. The pre-compression mechanism composed of telescopic rod and spring can dynamically compensate for the sealing pressure fluctuation, maintain the sealing pressure of air bladder and liquid bladder stable, and avoid sealing failure caused by sudden pressure drop. It is suitable for long-term continuous operation scenarios.

[0015] Furthermore, both setting and unsealing processes are achieved by rotating and pulling the handle, eliminating the need to disassemble the device or replace vulnerable parts. The anti-slip groove design of the handle and the quick-plug structure of the pin simplify the on-site operation process. A single person can complete the lowering, fixing, unsealing, and retrieval of the device, shortening the operation time and improving construction efficiency. Core components such as the upright, second sleeve, and fixing plate are made of high-strength alloy materials, which can withstand high pressure and impact loads. The surface of the fixing pin is hardened to improve wear resistance and extend service life. The air bladder is made of oil-resistant and aging-resistant composite rubber material, and the liquid bladder uses anti-corrosion sealing fluid, which is suitable for different formation fluid environments and reduces the risk of component damage caused by media erosion. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention; Figure 3 This is an exploded three-dimensional schematic diagram of the present invention; Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the fixing plate of this utility model; Figure 6 This is a three-dimensional cross-sectional view of the second sleeve of this utility model; Figure 7This is an exploded schematic diagram of the first sleeve of this utility model.

[0017] In the diagram: 1. Upright pole; 11. Handle; 111. Limiting ball; 12. Squeezing plate; 13. Airbag; 131. Liquid bladder; 14. First sleeve; 141. Telescopic rod; 142. Spring; 143. Inclined block; 15. Second sleeve; 151. Longitudinal limiting groove; 152. Transverse limiting groove; 16. Fixing plate; 17. Deflection rod; 171. Torsion spring; 18. Side plate; 181. Fixing pin; 2. Connecting plate; 21. Pin. 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] Example 1: A reusable in-hole plug packer uses a longitudinal limiting groove 151, a transverse limiting groove 152, and a limiting ball 111 to adjust the longitudinal position of the second sleeve 15. The overall device is fixed by the coordinated action of components such as the deflection rod 17, torsion spring 171, side plate 18, and fixing pin 181. This prevents the force points of the slips from being dispersed due to irregular hole walls, and prevents some slips from effectively contacting the hole walls, resulting in a localized biting state. Ultimately, this leads to insufficient overall fixing strength of the packer, which can easily cause axial displacement during high-pressure operations and even cause the packer position to shift.

[0020] like Figure 1 - Figure 6As shown, a reusable in-hole plug packer includes a pole 1, a limiting ball 111 fixedly connected to the outer wall of the pole 1, a second sleeve 15 sleeved above the outer wall of the pole 1, a longitudinal limiting groove 151 formed on the inner wall of the second sleeve 15, and a transverse limiting groove 152 formed on one side below the longitudinal limiting groove 151 on the inner wall of the second sleeve 15, with the longitudinal limiting groove 151 and the transverse limiting groove 152 communicating with each other. The limiting ball 111, the longitudinal limiting groove 151 and the transverse limiting groove 152 have the same radius, and the pole 1 and the second sleeve 15 are limited and connected by the limiting ball 111, the longitudinal limiting groove 151 and the transverse limiting groove 152. The limiting ball 111 on the outer wall of the pole 1 slides down along the longitudinal limiting groove 151 on the inner wall of the second sleeve 15. This allows for initial adjustment of the longitudinal position of the upright 1 within the second sleeve 15. After the limiting ball 111 slides down to the bottom of the longitudinal limiting groove 151, continued rotation of the upright 1 drives the limiting ball 111 to precisely engage with the transverse limiting groove 152. Because all three have the same radius, a tight fit is ensured, thereby locking the longitudinal position of the upright 1 and the second sleeve 15. This structurally eliminates the risk of axial movement of the upright 1 during subsequent operations. A handle 11 is fixedly connected to the top of the upright 1. Anti-slip grooves are evenly distributed on the outer wall of the handle 11, providing a point of force application for the operator, facilitating rotation and lifting of the upright 1. The evenly distributed anti-slip grooves on the outer wall increase the friction between the hand and the handle 11, preventing slippage during operation and ensuring stable force application. The rotation, positioning, and lifting action of the upright 1 are completed. A fixed plate 16 is fixedly connected to the bottom of the second sleeve 15. Deflecting rods 17 are rotatably connected to all four sides of the fixed plate 16. Torsion springs 171 are rotatably connected to both sides of the deflecting rods 17. Side plates 18 are fixedly connected to the deflecting rods 17, and fixing pins 181 are evenly fixed to the outer wall of the side plates 18. When the upright 1 is positioned and lifted upwards, the bottom component drives the first sleeve 14 to move upwards synchronously. The inclined block 143 installed at the top of the first sleeve 14 moves upwards accordingly, creating lateral pressure on the deflecting rods 17 rotatably connected to all four sides of the fixed plate 16. Under the pushing force of the inclined block 143, the deflecting rods 17 deflect outwards around the hinge point of the fixed plate 16, simultaneously compressing the torsion springs 171 on both sides. During this process... The storage of reset force prepares for the reset of the deflection rod 17 during subsequent unsealing. When the deflection rod 17 deflects outward, it drives the side plate 18 fixed to the outer wall to unfold outward synchronously until the fixing pins 181 evenly distributed on the outer wall of the side plate 18 are tightly embedded in the hole wall, forming a multi-point distributed anchoring structure, completing the initial fixation of the device. The multi-point anchoring design can avoid the problem of force point dispersion caused by irregular hole walls, and improve the fixation stability. The extrusion plate 12 fixedly connected to the bottom of the upright 1, the first sleeve 14 sleeved on the outer wall of the upright 1, and the connecting plate 2 fixedly connected to the outer wall of the second sleeve 15 are all connected to the upright 1. When the upright 1 is pulled upward, the extrusion plate 12 at the bottom drives the first sleeve 14 sleeved on the outer wall to move upward synchronously, providing power for the top inclined block 143 of the first sleeve 14 to press the deflection rod 17.The pin 21 on the connecting plate 2 of the outer wall of the second sleeve 15 can be further inserted into a pre-set hole position in the borehole wall or a rock stratum crevice. Together with the previously formed multi-point anchoring structure, it forms a dual fixing structure of multi-point anchoring and pin 21 reinforcement, significantly enhancing the device's resistance to axial displacement and meeting the stability requirements under high-pressure operating conditions.

[0021] Example 2: Unlike Example 1, as the upright 1 moves upward, the compression plate 12 drives the first sleeve 14 to move upward. The first sleeve 14 drives the telescopic rod 141, spring 142, and inclined block 143 to move upward. The inclined block 143 at the top of the first sleeve 14 compresses the side plate 18 at the bottom of the fixing plate 16, making the overall device more secure. As the compression plate 12 moves upward, it compresses the airbag 13, which in turn compresses the liquid bladder 131, thus improving the seal. This prevents some mechanical slip-type packers from being used with simple pressure airbags 13 for auxiliary sealing. However, these airbags 13 are mostly single-layer thin rubber structures and only expand slightly through the pressure of the slips when they are fixed. They cannot adapt to irregular areas of the hole wall and are prone to forming sealing gaps, leading to problems such as fluid cross-layering and pressure leakage, which seriously affect the accuracy and safety of the operation.

[0022] like Figure 7As shown, a compression plate 12 is fixedly connected to the bottom of the upright 1. Airbags 13 are uniformly sleeved on the outer wall of the upright 1. Liquid bladders 131 are fixedly connected to the outer wall of the airbags 13, and the airbags 13 and liquid bladders 131 are located above the compression plate 12. When the first sleeve 14 moves upward, because its bottom is fixedly connected to the top of the airbags 13, it can synchronously drive the airbags 13 to move upward. At the same time, the compression plate 12 at the bottom of the upright 1 forms a stable reverse support for the bottom of the airbags 13. Under the dual action of upward traction and bottom support, the internal pressure of the airbags 13 rises rapidly and undergoes radial expansion, forming a basic elastic sealing layer, initially blocking the fluid flow path in the hole. The liquid bladders 131 will synchronously conform to the hole wall according to the shape of the airbags 13. For irregular areas with unevenness and gaps in the hole wall, the liquid bladders 131 can fully fill the sealing gap through their own deformation, together with the airbags 13, forming an elastic seal of the airbags 13 and a gap filling of the liquid bladders 131. The double sealing structure completely eliminates the defects of traditional single-layer airbags 13 that are prone to gaps, effectively avoiding fluid cross-layering and pressure leakage problems. A first sleeve 14 is sleeved on the outer wall of the upright 1, and the bottom of the first sleeve 14 is fixedly connected to the top of the airbag 13. The top of the first sleeve 14 is evenly provided with mounting grooves, and a telescopic rod 141 is fixedly connected in the mounting groove. A spring 142 is sleeved on the outer wall of the telescopic rod 141, and an inclined block 143 is fixedly connected to the top of the telescopic rod 141. The telescopic rod 141 and the spring 142 work together to continuously provide pre-pressure after the airbag 13 expands. This pre-pressure can dynamically offset the fluctuation of sealing pressure during operation, ensuring that the airbag 13 and the liquid bladder 131 are always tightly attached to the hole wall, maintaining a stable and long-lasting sealing effect, and adapting to the needs of long-term continuous operation. A connecting plate 2 is fixedly connected to the outer wall of the second sleeve 15, and pins 21 are evenly and movably connected to the connecting plate 2.

[0023] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reusable in-hole plug packer, comprising a pole (1), characterized in that: A limiting ball (111) is fixedly connected to the outer wall of the upright (1). A second sleeve (15) is sleeved on the upper part of the outer wall of the upright (1). A longitudinal limiting groove (151) is opened on the inner wall of the second sleeve (15). A transverse limiting groove (152) is opened on one side below the longitudinal limiting groove (151) on the inner wall of the second sleeve (15). The longitudinal limiting groove (151) and the transverse limiting groove (152) are connected. A fixing plate (16) is fixedly connected to the bottom of the second sleeve (15). A deflection rod (17) is rotatably connected around the fixing plate (16). A torsion spring (171) is rotatably connected to both sides of the deflection rod (17). A side plate (18) is fixedly connected to the deflection rod (17). A fixing pin (181) is evenly fixedly connected to the outer wall of the side plate (18).

2. A reusable in-hole plug packer according to claim 1, characterized in that: The radii of the limiting ball (111), the longitudinal limiting groove (151), and the transverse limiting groove (152) are the same, and the upright (1) and the second sleeve (15) are connected by the limiting ball (111), the longitudinal limiting groove (151), and the transverse limiting groove (152).

3. A reusable in-hole plug packer according to claim 1, characterized in that: The top of the pole (1) is fixedly connected to a handle (11), and anti-slip grooves are evenly provided on the outer wall of the handle (11).

4. A reusable in-hole plug packer according to claim 1, characterized in that: The bottom of the upright (1) is fixedly connected to a compression plate (12), and air bags (13) are evenly sleeved on the outer wall of the upright (1). A liquid bag (131) is fixedly connected to the outer wall of the air bag (13), and the air bag (13) and the liquid bag (131) are located above the compression plate (12).

5. A reusable in-hole plug packer according to claim 1, characterized in that: The first sleeve (14) is fitted onto the outer wall of the pole (1), and the bottom of the first sleeve (14) is fixedly connected to the top of the airbag (13). The top of the first sleeve (14) is evenly provided with mounting grooves, and a telescopic rod (141) is fixedly connected in the mounting groove. A spring (142) is fitted onto the outer wall of the telescopic rod (141), and an inclined block (143) is fixedly connected to the top of the telescopic rod (141).

6. A reusable in-hole plug packer according to claim 1, characterized in that: A connecting plate (2) is fixedly connected to the outer wall of the second sleeve (15), and pins (21) are evenly and movably connected to the connecting plate (2).

Images