Packer for oil field well

Abstract

The utility model provides a packer for an oil field well, which relates to the technical field of packers, and comprises a packer shell, a packer pushing block and a pushing cone, a transmission adjusting rod is arranged in the packer shell, a limiting seat is fixedly arranged on the inner wall of the packer shell, the packer pushing block is arranged in the packer shell, and the pushing cone is fixedly arranged on the inner wall of the packer shell. A pushing block is fixedly installed on the surface of the packing piece pushing block, and a connecting rod is fixedly installed at the top end of the packing piece pushing block. According to the packer, the packer pushing block and the pushing cone are arranged, the pushing cone can move through rotation of the transmission adjusting rod, when the pushing cone moves, the pushing cone abuts against the packer pushing block, and therefore the packer pushing block horizontally moves towards the outside; the packing rubber part can be pushed out from the surface of the packer shell, so that the packing rubber part is clamped on the inner wall of an oil field well to complete packing, and the situation that the packing rubber part retracts due to liquid backflow can be prevented in the mode.

Description

Technical Field

[0001] The utility model relates to the technical field of packers, in particular to a packer for oil field wells. Background Art

[0002] The packer is a tool used to isolate the annular space between the oil pipe and the casing of the oil and gas well or the open hole wall. It is a commonly used tool and facility in oil production operations. It can stop or control the mutual channeling of oil, gas and water, so as to ensure that there is no leakage or gas channeling during the circulation and slurry mixing after cementing.

[0003] Defects of traditional packers: Most existing packers are usually driven by hydraulic pressure to expand the packer, so that the packer is attached to the inner wall of the oil field well to complete the isolation. In actual use, when the high-pressure liquid stops being transported, the liquid will flow back, causing the hydraulic oil in the packer to flow back, causing the packer to shrink, resulting in a loose seal.

[0004] Therefore, a packer that can solve the above problems is urgently needed. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to solve the problem that most of the existing packers mentioned in the background technology are driven by hydraulic means, and liquid reflux may occur during use, causing the packing to retract and resulting in loose sealing.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a packer for oilfield wells, comprising a packer shell, a packer push block and a push cone, a transmission adjustment rod is installed inside the packer shell, a limit seat is fixedly installed on the inner wall of the packer shell, a packer push block is installed inside the packer shell, and a push block is fixedly installed on the surface of the packer push block;

[0007] A connecting rod is fixedly installed on the top of the sealing member pushing block, a limiting slider is fixedly installed on the top of the connecting rod, and a mounting frame is fixedly installed on the top of the limiting slider, a return spring is installed on the side of the mounting frame, and a pushing cone is installed on the surface of the transmission adjustment rod.

[0008] Preferably, a placing base is fixedly installed on the bottom end of the packer shell, a connecting frame is fixedly installed on the top end of the packer shell, and a pulling block is fixedly installed on the top end of the connecting frame, a limiting rod is fixedly installed inside the packer shell, and a sealing rubber part is fixedly installed on the surface of the packer shell.

[0009] Preferably, the connecting frame is composed of two hollow rectangles, the interior of the packer shell is a hollow structure, and a group of circular holes are opened at the top of the packer shell.

[0010] Preferably, transmission screws are fixedly installed at both ends of the transmission adjustment rod, a transmission shaft is fixedly installed at the top of the transmission adjustment rod, and an adjustment knob is fixedly installed at the top of the transmission shaft, the transmission shaft is adapted to the size of the circular hole groove opened at the top of the packer shell, and the thread directions of the two sets of transmission screws are opposite to each other.

[0011] Preferably, four groups of the sealing member pushing blocks are installed in total, a group of arc-shaped grooves are opened on the side of the sealing member pushing blocks, a group of rectangular slide grooves are opened inside the limit seat, the limit sliding block is adapted to the size of the rectangular slide grooves opened inside the limit seat, and the other end of the reset spring is fixedly installed on the inner wall of the sealing device shell.

[0012] Preferably, a baffle is fixedly installed on the bottom end of the pushing vertebral body, a threaded fixing seat is fixedly installed inside the pushing vertebral body, two groups of circular hole grooves are opened inside the pushing vertebral body, the limiting rod is adapted to the size of the circular hole grooves opened inside the pushing vertebral body, a group of circular screw holes are opened inside the threaded fixing seat, the transmission screw is adapted to the size of the circular screw holes opened inside the threaded fixing seat, and the transmission screw and the threaded fixing seat are mating components.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: by providing a packing pushing block and a pushing cone, the pushing cone can be moved by rotating the transmission adjustment rod, and when the pushing cone moves, it will resist the packing pushing block, so that the packing pushing block can move horizontally toward the outside, and the packing rubber part can be pushed out from the surface of the packer shell, so that the packing rubber part is engaged with the inner wall of the oil field well to complete the isolation, and in this way, the packing rubber part can be prevented from shrinking due to liquid reflux. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure schematic diagram provided according to the embodiment of the utility model is shown;

[0015] Figure 2 A schematic cross-sectional view of the overall structure provided according to an embodiment of the utility model is shown;

[0016] Figure 3 A schematic diagram of the structure of a packing member push block provided according to an embodiment of the utility model is shown;

[0017] Figure 4 A schematic diagram of the pushing vertebral body structure provided according to an embodiment of the utility model is shown.

[0018] Legend:

[0019] 1. Packer housing; 101. Placement base; 102. Connecting frame; 103. Pulling block; 104. Limiting rod; 105. Packer rubber part; 2. Transmission adjustment rod; 201. Transmission screw; 202. Transmission shaft; 203. Adjustment knob; 3. Limiting seat; 4. Packer push block; 401. Push block; 402. Connecting rod; 403. Limiting slider; 404. Installation frame; 405. Reset spring; 5. Pushing vertebral body; 501. Baffle; 502. Threaded fixing seat. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] like Figure 1-4 As shown, in an embodiment of the utility model: a packer for oil field wells includes a packer housing 1, a packer pushing block 4 and a pushing cone 5.

[0023] In specific operation, a transmission adjustment rod 2 is installed inside the packer housing 1, a limit seat 3 is fixedly installed on the inner wall of the packer housing 1, a packer push block 4 is installed inside the packer housing 1, and a push block 401 is fixedly installed on the surface of the packer push block 4;

[0024] A connecting rod 402 is fixedly installed on the top of the sealing member pushing block 4, a limiting slider 403 is fixedly installed on the top of the connecting rod 402, and a mounting frame 404 is fixedly installed on the top of the limiting slider 403. A return spring 405 is installed on the side of the mounting frame 404, and a pushing cone 5 is installed on the surface of the transmission adjustment rod 2.

[0025] A placing base 101 is fixedly installed at the bottom end of the packer housing 1, a connecting frame 102 is fixedly installed at the top end of the packer housing 1, and a pulling block 103 is fixedly installed at the top end of the connecting frame 102, a limiting rod 104 is fixedly installed inside the packer housing 1, and a sealing rubber part 105 is fixedly installed on the surface of the packer housing 1.

[0026] The connecting frame 102 is composed of two hollow rectangles. The interior of the packer shell 1 is a hollow structure. A group of circular holes are opened at the top of the packer shell 1.

[0027] By installing a retractable connecting frame 102 on the top of the packer housing 1, the packer can be easily placed in the oil field well to be isolated during use, and after use, the packer can be easily taken out of the oil field well.

[0028] Transmission screws 201 are fixedly installed at both ends of the transmission adjustment rod 2, a transmission shaft 202 is fixedly installed at the top of the transmission adjustment rod 2, and an adjustment knob 203 is fixedly installed at the top of the transmission shaft 202. The transmission shaft 202 is adapted to the size of the circular hole groove opened at the top of the packer shell 1, and the thread directions of the two sets of transmission screws 201 are opposite to each other.

[0029] In this way, the transmission adjustment rod 2 can be installed and penetrated throughout the interior of the packer, and the transmission shaft 202 can be rotated at the top of the packer shell 1. The transmission adjustment rod 2 can be rotated by rotating the transmission shaft 202, thereby completing the expansion adjustment of the isolation rubber member 105.

[0030] A total of four groups of sealing member push blocks 4 are installed. A group of arc-shaped grooves are opened on the side of the sealing member push blocks 4, and a group of rectangular slide grooves are opened inside the limit seat 3. The limit slider 403 is adapted to the size of the rectangular slide groove opened inside the limit seat 3, and the other end of the reset spring 405 is fixedly installed on the inner wall of the sealing device shell 1.

[0031] By arranging four groups of packer pushing blocks 4 inside the packer housing 1, when the packer pushing blocks 4 are pushed outward together, the packer pushing blocks 4 can apply the same force to the packer rubber member 105, so that the packer rubber member 105 can be expanded evenly. The oil field well can be isolated by utilizing the even expansion of the packer rubber member 105.

[0032] A baffle 501 is fixedly installed at the bottom end of the pushing vertebral body 5, a threaded fixing seat 502 is fixedly installed inside the pushing vertebral body 5, two groups of circular hole grooves are opened inside the pushing vertebral body 5, the limiting rod 104 is adapted to the size of the circular hole grooves opened inside the pushing vertebral body 5, a group of circular screw holes are opened inside the threaded fixing seat 502, the transmission screw 201 is adapted to the size of the circular screw holes opened inside the threaded fixing seat 502, and the transmission screw 201 and the threaded fixing seat 502 are matching components.

[0033] Since the surface of the pushing vertebral body 5 is adapted to the arc-shaped groove opened on the side of the sealing member pushing block 4, the sealing member pushing block 4 can be pushed as the pushing vertebral body 5 moves. By pushing the circular hole groove opened on the surface of the vertebral body 5, the limiting rod 104 can be used to limit the pushing vertebral body 5, so that the pushing vertebral body 5 can move up and down. Since the threaded fixing seat 502 and the transmission screw 201 are mutually mating components, the rotation of the transmission screw 201 can drive the threaded fixing seat 502 to move on its surface, thereby making the pushing vertebral body 5 rise and fall.

[0034] In summary, the working principle of the utility model is as follows: when it is necessary to prevent the sealing rubber member 105 from shrinking and causing a loose seal, first put the device into the oil field well that needs to be sealed, and after determining the position where the device needs to be placed, rotate the adjusting knob 203, and the transmission shaft 202 can be rotated by rotating the adjusting knob 203, and the transmission adjustment rod 2 and the transmission screw 201 can be rotated by rotating the transmission shaft 202. When the transmission screw 201 is rotating, the pushing vertebral body 5 will slide, and the two groups of pushing vertebral bodies 5 will slide toward the two ends of the transmission adjustment rod 2, and the pushing vertebral body 5 can be used to push the packing piece 4 into The packing push block 4 is pressed and pushed. When the packing push block 4 is pressed and pushed, the packing push block 4 moves horizontally toward the outside. When the packing push block 4 moves horizontally, the push block 401 squeezes and pushes the packing rubber member 105. In this way, the packing rubber member 105 can be pushed out from the surface of the packer housing 1. In this way, the packing rubber member 105 can be expanded and engaged with the inner wall of the oil field well, so that the oil field well can be isolated. Sealing the oil field well in this way can effectively prevent the packing rubber member 105 from shrinking due to liquid reflux, and can prevent the oil field well from being poorly sealed.

[0035] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A packer for oilfield wells, comprising a packer housing, a packer push block and a push cone, characterized in that: A transmission adjustment rod is installed inside the packer shell, a limit seat is fixedly installed on the inner wall of the packer shell, a packer push block is installed inside the packer shell, and a push block is fixedly installed on the surface of the packer push block; A connecting rod is fixedly installed on the top of the sealing member pushing block, a limiting slider is fixedly installed on the top of the connecting rod, and a mounting frame is fixedly installed on the top of the limiting slider, a return spring is installed on the side of the mounting frame, and a pushing cone is installed on the surface of the transmission adjustment rod.

2. The oilfield well packer according to claim 1, characterized in that: A placing base is fixedly installed at the bottom end of the packer shell, a connecting frame is fixedly installed at the top end of the packer shell, and a pulling block is fixedly installed at the top end of the connecting frame. A limiting rod is fixedly installed inside the packer shell, and a sealing rubber piece is fixedly installed on the surface of the packer shell.

3. The oilfield well packer according to claim 2, characterized in that: The connecting frame is composed of two hollow rectangles, the interior of the packer shell is a hollow structure, and a group of circular holes are opened on the top of the packer shell.

4. The oilfield well packer according to claim 3, characterized in that: Transmission screws are fixedly installed at both ends of the transmission adjustment rod, a transmission shaft is fixedly installed at the top of the transmission adjustment rod, and an adjustment knob is fixedly installed at the top of the transmission shaft. The transmission shaft is adapted to the size of the circular hole groove opened at the top of the packer shell, and the thread directions of the two sets of transmission screws are opposite to each other.

5. The oilfield well packer according to claim 4, characterized in that: A total of four groups of the sealing member pushing blocks are installed. A group of arc-shaped grooves are opened on the side of the sealing member pushing blocks, and a group of rectangular slide grooves are opened inside the limit seat. The limit sliding block is adapted to the size of the rectangular slide groove opened inside the limit seat, and the other end of the reset spring is fixedly installed on the inner wall of the sealing device shell.

6. The packer for oilfield wells according to claim 5, characterized in that: A baffle is fixedly installed on the bottom end of the pushing vertebral body, a threaded fixing seat is fixedly installed inside the pushing vertebral body, two groups of circular hole grooves are opened inside the pushing vertebral body, the limit rod is adapted to the size of the circular hole grooves opened inside the pushing vertebral body, a group of circular screw holes are opened inside the threaded fixing seat, the transmission screw is adapted to the size of the circular screw holes opened inside the threaded fixing seat, and the transmission screw and the threaded fixing seat are mating components.

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