Underground metal packer

Abstract

The utility model relates to the technical field of crude oil extraction, and discloses an underground metal packer which comprises a sliding sleeve, an oil pipe and a packing assembly, the inner side of the sliding sleeve is connected to the outer side of the oil pipe in a sliding mode, the packing assembly is arranged on the outer side of the sliding sleeve, and a positioning assembly is arranged on the outer side of the sliding sleeve. The positioning assembly is used for stabilizing the position of the packer; and the positioning assembly comprises a sliding ring and a cross plate, the cross plate is fixedly connected to the outer side of the sliding sleeve, four sliding grooves are formed in the cross plate, and four connecting rods are rotationally connected to the bottom of the sliding ring. According to the packer, pressure is applied to the pressure applying seat through external hydraulic equipment, so that the rubber block is attached to the well wall to fix the position of the sliding sleeve, meanwhile, the rubber barrel is pressed and deformed to extend towards the well wall and completely block the well wall, packing operation is completed, compared with a traditional packer, operation steps are reduced, quick positioning can be achieved during packing, portability is improved, and the packer is convenient to use and popularize. And the production cost is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crude oil mining, in particular to a downhole metal packer. Background Art

[0002] Downhole metal packers play a vital role in fields such as oil and gas extraction. With the continuous development of oil and gas resources, the performance requirements for downhole packers are becoming increasingly demanding. Downhole metal packers are primarily used to isolate layers in downhole environments such as oil and gas wells, enabling targeted extraction and operations. They effectively control the flow of downhole fluids, ensuring efficient extraction and safe production of oil and gas resources.

[0003] Existing downhole metal packers typically consist of multiple complex components, including a main structure, a sealing assembly, and a positioning device. Installation typically requires the use of a variety of tools and equipment. The sealing assembly is often made of materials such as rubber and achieves a seal with the wellbore wall through mechanical compression and other methods.

[0004] In actual downhole operations, existing downhole metal packers present several significant challenges. First, the installation process is often complex, requiring multiple pre-installation steps. For example, prior to installation, the packer must be positioned in conjunction with the tubing before isolation can be performed. Furthermore, existing packers are complex and often relatively long, requiring significant space during transportation. Therefore, downhole metal packers have been proposed in the art to address these challenges. Utility Model Content

[0005] In order to make up for the above shortcomings, the present invention provides a downhole metal packer, which aims to improve the problems of the metal packer in the prior art in that it has too many operating steps when in use and is too long and inconvenient to transport.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a downhole metal packer, comprising a sliding sleeve, an oil pipe, and a packer assembly, wherein the inner side of the sliding sleeve is slidably connected to the outer side of the oil pipe, the packer assembly is arranged on the outer side of the sliding sleeve, and a positioning assembly is arranged on the outer side of the sliding sleeve, wherein the positioning assembly is used to stabilize the position of the packer;

[0007] The positioning assembly includes a sliding ring and a cross plate. The cross plate is fixedly connected to the outside of the sliding sleeve. Four sliding grooves are opened inside the cross plate. The bottom of the sliding ring is rotatably connected to four connecting rods. One end of the connecting rod is rotatably connected to a slider. The bottom of the slider is fixedly connected to a rubber block.

[0008] Furthermore, the inner side of the sliding ring is slidably connected to the outer side of the sliding sleeve, and the outer side of the sliding block is slidably connected to the inner side of the sliding groove.

[0009] Furthermore, the top of the sliding ring is fixedly connected to a tray, and the top of the sliding sleeve is fixedly connected to a hanging ring.

[0010] Furthermore, the sealing assembly includes a pressure seat and two rubber tubes, and the rubber tubes are sleeved on the outside of the sliding sleeve.

[0011] Furthermore, a pressure seat is slidably connected to the outer side of the sliding sleeve, and the bottom of the pressure seat is in contact with the top of the upper rubber tube.

[0012] Furthermore, the bottom of the rubber tube on the lower side is in contact with the top of the tray, and the outer side of the rubber block is in contact with the outer well wall.

[0013] Furthermore, the rubber tube is in the shape of a ring, and the outer circumference of the rubber tube fits against the outer well wall.

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

[0015] In the utility model, the oil pipe is extended into the oil well, the rope is connected to the hanging ring, and the sliding sleeve is allowed to slide down along the outer wall of the oil pipe to the specified position. The oil pipe anti-slip sleeve is suspended by a rope and continues to slide down. Then, external hydraulic equipment is used to apply pressure to the pressure seat, so that the rubber tube pushes the tray to drive the sliding ring to slide down, and the connecting rod is rotated to push the slider to drive the rubber block to fit the well wall. Continuous pressure is applied to make it fit more tightly, and then the rope tension is removed. The rubber block tightens and fixes the position of the sliding sleeve in the well. At the same time, the rubber tube is deformed under pressure and extends toward the well wall and completely blocks the well wall, completing the sealing operation. Compared with traditional packers, this type of packer reduces the pre-operation steps and can quickly position while sealing. Due to the simplified operation steps and structure, the volume is reduced, which not only improves portability, but also reduces production costs, is more convenient for transportation and installation, and brings better economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the downhole metal packer proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the rubber block structure of the downhole metal packer proposed by the utility model;

[0018] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0019] Legend:

[0020] 1. Sliding sleeve; 2. Oil pipe; 3. Sliding ring; 4. Tray; 5. Connecting rod; 6. Cross plate; 7. Slide groove; 8. Slider; 9. Rubber block; 10. Hanging ring; 11. Pressure seat; 12. Rubber tube. DETAILED DESCRIPTION

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

[0022] Reference Figure 1-Figure 3The utility model provides a kind of embodiment: downhole metal packer, including sliding sleeve 1, oil pipe 2 and packer subassembly, the inside of sliding sleeve 1 is slidably connected in the outside of oil pipe 2, packer subassembly is arranged in the outside of sliding sleeve 1, sliding sleeve 1 is usually made of high-strength metal material, with good wear resistance and corrosion resistance.The inside of sliding sleeve 1 is slidably connected in the outside of oil pipe 2, can slide up and down along oil pipe 2, to adjust the position of packer in oil well.Oil pipe 2 is the important passage for sending packer into the inside of oil well.Oil pipe 2 is usually made of high-strength steel material, with enough strength and sealing, can withstand high-pressure environment in the inside of oil well.Packer subassembly is arranged in the outside of sliding sleeve 1, the outside of sliding sleeve 1 is provided with positioning assembly, and positioning assembly is used to make the position of packer stable.Positioning assembly includes sliding ring 3 and cross plate 6.Cross plate 6 is fixedly connected in the outside of sliding sleeve 1, and cross plate 6 is usually made of metal material, with higher strength and stability.Four slide grooves 7 are opened in the inside of cross plate 6, and slide groove 7 provides track for the sliding of sliding block 8.Four connecting rods 5 are rotatably connected to the bottom of sliding ring 3.Connecting rod 5 is usually made of metal material, with higher strength and wear resistance.One end of connecting rod 5 is rotatably connected with sliding block 8, and sliding block 8 is usually made of metal material, with higher strength and wear resistance.Rubber block 9 is fixedly connected to the bottom of sliding block 8, and rubber block 9 is usually made of elastic material, such as rubber or silica gel.The outside of rubber block 9 is attached with external well wall, can provide friction, so that packer keeps stable in well.The inside of sliding ring 3 is slidably connected with the outside of sliding sleeve 1, can slide up and down along sliding sleeve 1.The outside of sliding block 8 is slidably connected with the inside of slide groove 7, ensures that sliding block 8 can stably slide on cross plate 6.The top of sliding ring 3 is fixedly connected with tray 4.Tray 4 is usually made of metal material, with higher strength and stability.Tray 4 can support rubber tube 12, so that it can stably deform when being pressed.The top of sliding sleeve 1 is fixedly connected with hanging ring 10.Hanging ring 10 is usually made of metal material, with higher strength and wear resistance.Hanging ring 10 is used to connect rope, so that it can be hung when installing packer, prevent the position of sliding sleeve 1 from continuing to drop.Packer subassembly includes pressure seat 11 and two rubber tubes 12.Rubber tube 12 is sleeved in the outside of sliding sleeve 1, and is usually made of rubber material, with good elasticity and sealing.The outside of sliding sleeve 1 is slidably connected with pressure seat 11, and pressure seat 11 is usually made of metal material, with higher strength and stability.The bottom of pressure seat 11 is attached with the top of upper rubber tube 12, can transmit external pressure to rubber tube 12.The bottom of lower rubber tube 12 is attached with the top of tray 4, ensures that rubber tube 12 can stably deform when being pressed.Rubber tube 12 is circular, and the periphery of rubber tube 12 is attached with external well wall, can extend to well wall when being pressed, completely blocks well wall, realizes packer effect.

[0023] Specifically, the oil pipe 2 is inserted into the oil well. The length and diameter of the oil pipe 2 are typically selected based on the well's depth and diameter to ensure smooth insertion of the packer. A rope is connected to the hanging ring 10, and the sliding sleeve 1 is then lowered down the outer wall of the oil pipe 2 to the designated position. During this lowering process, the sliding connection between the sliding sleeve 1 and the oil pipe 2 ensures smooth movement. The oil pipe 2 is then secured with a rope to prevent the sliding sleeve 1 from further descending. The rope's strength and length are typically selected based on the packer's weight and the well's depth to ensure stable support of the oil pipe 2 and sliding sleeve 1. External hydraulic equipment is then used to directly apply pressure to the pressure seat 11. External hydraulic equipment typically has a high pressure output capability, providing sufficient pressure for the packer's sealing operation. Two rubber tubes 12 then push the tray 4, driving the sliding ring 3 downward. The rubber tube 12 deforms under pressure, transmitting the pressure to the tray 4. The tray 4 then drives the sliding ring 3 downward along the sliding sleeve 1. This causes the four connecting rods 5 to rotate, pushing the slider 8, which in turn causes the rubber block 9 to slide, allowing the outer side of the rubber block 9 to conform to the wellbore wall. The rotation of the connecting rod 5 converts the downward motion of the sliding ring 3 into horizontal motion of the slider 8, allowing the rubber block 9 to conform tightly to the wellbore wall. With continued pressure, the rubber block 9 conforms even more tightly to the wellbore wall. The elasticity of the rubber block 9 ensures sufficient friction between it and the wellbore wall, keeping the packer stable within the wellbore. At this point, the tension of the rope on the hanging ring 10 can be removed, and the four rubber blocks 9 can be tightened inside the wellbore, stabilizing the position of the sliding sleeve 1. Simultaneously, the two rubber tubes 12 begin to deform under the pressure, their outer circumference extending toward the wellbore wall and completely blocking it. The deformation of the rubber tube 12 can adapt to wellbore walls of varying diameters, ensuring the effective isolation. This completes the isolation operation. Compared to traditional packers, this design reduces multiple pre-operation steps and allows for quick positioning during the isolation operation. While traditional packers require multiple, complex installation steps, this new packer simplifies the installation process through its ingenious structural design. With fewer steps and fewer components, the overall size is smaller. This reduced size and simplicity allow for a smaller packer, improving portability while also reducing production costs. This smaller size facilitates transportation and installation, lowering production costs and improving economic efficiency.

[0024] Working principle: First, extend the oil pipe 2 into the oil well, connect the rope to the hanging ring 10, and then slide the sliding sleeve 1 down along the outer wall of the oil pipe 2 to the specified position. At this time, use the rope to hang the oil pipe 2 to prevent the position of the sliding sleeve 1 from continuing to drop. Then use external hydraulic equipment to directly apply pressure to the pressure seat 11, and then let the two rubber tubes 12 push the tray 4 to drive the sliding ring 3 to slide down, so that the four connecting rods 5 rotate, and push the slider 8 to drive the rubber block 9 to slide, so that the outer side of the rubber block 9 fits the well wall. As the pressure continues to be applied, the rubber block 9 will fit more closely to the well wall. Tight, at this time the tension of the rope on the hanging ring 10 can be removed, the four rubber blocks 9 can be tightened inside the well, so that the position of the sliding sleeve 1 is stable, and at the same time the two rubber tubes 12 begin to deform under the pressure, and the outer circumference of the rubber tube 12 extends toward the well wall and completely blocks the well wall, thus completing the sealing operation. Compared with the traditional packer, this design of the packer reduces multiple pre-operation steps and can perform quick positioning during the sealing operation, with fewer operating steps, fewer structures and a smaller overall volume, which improves portability while reducing production costs.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A downhole metal packer, comprising a sliding sleeve (1), an oil pipe (2) and a packer assembly, characterized in that: The inner side of the sliding sleeve (1) is slidably connected to the outer side of the oil pipe (2), the packer assembly is arranged on the outer side of the sliding sleeve (1), and a positioning assembly is provided on the outer side of the sliding sleeve (1), and the positioning assembly is used to stabilize the position of the packer; The positioning assembly comprises a sliding ring (3) and a cross plate (6), wherein the cross plate (6) is fixedly connected to the outside of the sliding sleeve (1), and four sliding grooves (7) are provided inside the cross plate (6). The bottom of the sliding ring (3) is rotatably connected to four connecting rods (5), one end of the connecting rod (5) is rotatably connected to a slider (8), and the bottom of the slider (8) is fixedly connected to a rubber block (9).

2. The downhole metal packer according to claim 1, characterized in that: The inner side of the sliding ring (3) is slidably connected to the outer side of the sliding sleeve (1), and the outer side of the sliding block (8) is slidably connected to the inner side of the sliding groove (7).

3. The downhole metal packer according to claim 1, characterized in that: The top of the sliding ring (3) is fixedly connected to a tray (4), and the top of the sliding sleeve (1) is fixedly connected to a hanging ring (10).

4. The downhole metal packer according to claim 1, characterized in that: The sealing assembly comprises a pressure seat (11) and two rubber tubes (12), wherein the rubber tubes (12) are sleeved on the outside of the sliding sleeve (1).

5. The downhole metal packer according to claim 4, characterized in that: The outer side of the sliding sleeve (1) is slidably connected to a pressure seat (11), and the bottom of the pressure seat (11) is in contact with the top of the upper rubber tube (12).

6. The downhole metal packer according to claim 5, characterized in that: The bottom of the rubber tube (12) on the lower side is in contact with the top of the tray (4), and the outer side of the rubber block (9) is in contact with the outer well wall.

7. The downhole metal packer according to claim 4, characterized in that: The rubber tube (12) is annular, and the outer periphery of the rubber tube (12) fits against the outer well wall.

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