A high-efficiency exploitation type anticorrosion drill pipe for oil and gas exploitation

Abstract

The application relates to the technical field of oil and gas exploitation drilling tools, and discloses a high-efficiency exploitation type anticorrosion drill pipe for oil and gas exploitation, which comprises a pipeline, an anticorrosion assembly is arranged in the pipeline, and a liquid discharge assembly is arranged above the pipeline; the anticorrosion assembly comprises zinc blocks which are fixedly installed at the inner end of the pipeline. The high-efficiency exploitation type anticorrosion drill pipe for oil and gas exploitation has the advantages that the anticorrosion assembly is installed and innovated, the seawater corrosion prevention capacity of the drill pipe is improved, when the drill pipe enters seawater, the zinc blocks, seawater and the steel pipeline become a primary cell, the zinc blocks contact seawater to perform a chemical reaction, the voltage difference in the pipeline is 0, the electrons of the pipeline cannot be lost, the pipeline cannot be affected by seawater, the pipeline is anticorrosion by sacrificing the zinc blocks, that is, the anode, and the anticorrosion performance of the high-efficiency exploitation type anticorrosion drill pipe for oil and gas exploitation is improved.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction drilling tools, specifically a high-efficiency, corrosion-resistant drill pipe for oil and gas extraction. Background Technology

[0002] Oil and gas extraction is the process of extracting oil and natural gas from underground reservoirs. The methods of bringing oil and gas from underground to the surface can be categorized based on whether artificial energy replenishment of the wellbore fluid is required: natural flow and artificial lift. Artificial lift oil production includes: gas lift, rod pump oil production, submersible electric centrifugal pump oil production, hydraulic piston pump oil production, and jet pump oil production, among others.

[0003] Oil and gas extraction from underground to the surface can be categorized based on whether or not artificial energy supplementation to the wellbore fluid is required: natural flow and artificial lift. Natural flow occurs when the reservoir has sufficient energy to lift oil to the surface using its own energy. Artificial lift occurs when the reservoir's energy is low, requiring artificial energy supplementation to the wellbore fluid to lift crude oil from the well bottom to the surface. Generally, oil fields with insufficient natural energy may lack natural flow capability, or even if they do, the flow period is short, lasting only about one year, and at most 3 to 5 years. However, an oil field's production lifespan is typically 20 to 30 years or more. Therefore, most crude oil in the reservoir is extracted through artificial lift. Artificial lift oil production includes: gas lift, rod pump oil production, submersible electric centrifugal pump oil production, hydraulic piston pump oil production, and jet pump oil production.

[0004] However, due to the acidic ions in seawater corroding steel drill rods during offshore drilling and mining, the surface of the drill rods rusts after long-term use, especially at the threaded joints, which require regular maintenance and application of anti-corrosion materials. Furthermore, once the threaded joints are corroded, the joints may loosen, leading to rod breakage or deformation. To address this, we have proposed an anti-corrosion drill rod that is easy to install and reduces corrosion at the drill rod joints by using sacrificial anodes. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a high-efficiency, corrosion-resistant drill pipe for oil and gas extraction, in order to solve the problems mentioned in the background art, where acidic ions in seawater corrode steel drill pipes during offshore drilling, causing surface rust after prolonged use. In particular, the threaded joints require regular maintenance and application of anti-corrosion materials, and once the threads are corroded, the joints become loose, leading to rod breakage or deformation.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency, corrosion-resistant drill pipe for oil and gas extraction, comprising a pipe, an anti-corrosion component disposed inside the pipe, and a drainage component disposed above the pipe; the anti-corrosion component comprises a zinc block, the zinc block being fixedly installed at the inner end of the pipe, a connecting rod being fixedly installed at the inner end of the zinc block, the connecting rod being fixedly installed at the inner end of the zinc block, the connecting rod penetrating the upper end of the zinc block and extending to the lower end of the zinc block, a first isolation plate being fixedly connected to the lower end of the connecting rod, the outer end of the first isolation plate being fixedly installed at the inner end of the pipe, a first drainage groove being fixedly disposed at the outer end of the first isolation plate, a first connecting groove being fixedly disposed at the outer end of the pipe, the first connecting groove penetrating the outer end of the pipe and extending to the inner end of the pipe, the first drainage groove and the first connecting groove being correspondingly positioned and connected, and the first drainage groove and the first connecting groove being arranged in a ring.

[0009] Preferably, the drainage assembly includes a splicing pipe, the lower end of which is fixedly installed on the upper end of a pipe. An inclined groove is fixedly provided on the outer end of the pipe, the inclined groove passing through the outer end of the splicing pipe and extending to the inner end of the splicing pipe. The inclined groove is distributed in a ring. A sealing ring is fixedly and movably installed on the inner end of the splicing pipe. A movable piece is fixedly installed on the inner end of the sealing ring. A liquid storage tank is fixedly provided on the outer end of the movable piece. A positioning block is fixedly installed on the upper end of the movable piece. A semi-circular groove is fixedly provided on the upper end of the positioning block.

[0010] Preferably, a limiting block is fixedly installed at the lower end of the movable piece, a spring is movably installed at the outer end of the limiting block, a fixing block is movably installed at the lower end of the outer end of the spring, a limiting groove is fixedly provided at the upper end of the fixing block, the lower end of the spring is movably installed at the inner end of the limiting groove, a support block is fixedly installed at the outer end of the fixing block, the support blocks are distributed in a ring, and the outer end of the support blocks is fixedly installed at the inner end of the pipe.

[0011] Preferably, the drainage assembly further includes a second isolation plate, which is fixedly installed at the inner end of the pipe. The lower end of the second isolation plate is fixedly connected to the upper end of the connecting rod. A second drainage groove is fixedly provided at the outer end of the connecting rod. A second connecting groove is fixedly provided at the outer end of the pipe. The second connecting groove passes through the outer end of the pipe and extends to the inner end of the pipe. The second connecting groove corresponds to and communicates with the second drainage groove. An installation assembly is provided below the pipe.

[0012] Preferably, the installation component includes an installation block, which is fixedly connected to the lower end of the pipe. A semi-circular block is fixedly installed at the lower end of the installation block, and a locking block is fixedly installed at the outer end of the installation block.

[0013] Preferably, an annular groove is fixedly provided at the inner end of the upper end of the splicing pipe, a first vertical sliding groove is fixedly provided at the inner end of the annular groove, a rotating sliding groove is provided at the inner end of the first vertical sliding groove, and a second vertical sliding groove is provided at the inner end of the rotating sliding groove.

[0014] Preferably, the inner end face of the semicircular groove matches the outer end face of the semicircular block, the liquid storage tank is annular, and the cross-section of the liquid storage tank is semicircular.

[0015] Preferably, the outer end face of the card block matches the inner end face of the first vertical groove, the outer end face of the card block matches the second vertical groove, and the card block is arc-shaped and symmetrically distributed on the outer end of the connecting block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This high-efficiency anti-corrosion drill pipe for oil and gas extraction improves the ability to prevent seawater corrosion through the installation and innovation of anti-corrosion components. In actual use, when the drill pipe enters seawater, the zinc block, seawater, and steel pipe become a galvanic cell. The zinc block reacts with the seawater to make the voltage difference in the pipe zero, so that the pipe's own electrons will not be lost and will not interact with the seawater. The pipe is protected against corrosion by sacrificing the zinc block, which is the anode, thus improving the anti-corrosion performance of this high-efficiency anti-corrosion drill pipe for oil and gas extraction.

[0018] 2. This high-efficiency, corrosion-resistant drill pipe for oil and gas extraction improves the service life of the interface by installing and innovating the drainage component. In actual use, seawater entering the interface can be discharged through the inclined groove. When the drill pipe is pulled out of the well, the seawater in the splicing pipe is discharged from the inclined groove, preventing a large amount of seawater from remaining in the splicing pipe and being exposed to the air to corrode the splicing pipe. This improves the corrosion resistance of the interface of the high-efficiency, corrosion-resistant drill pipe for oil and gas extraction.

[0019] 3. This high-efficiency, corrosion-resistant drill pipe for oil and gas extraction improves loading and unloading efficiency and corrosion resistance through innovative installation components. In practical use, the connection method has been changed from threaded connection to clamp connection, which facilitates installation and disassembly while strengthening the joint of the drill pipe. Threaded connections are relatively precise, making installation difficult after corrosion and requiring regular maintenance. The clamps reduce the degree of corrosion at the interface by changing the wall thickness. The clamps have a higher fault tolerance and longer service life than threads, thus improving the stability and installation efficiency of this high-efficiency, corrosion-resistant drill pipe for oil and gas extraction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic cross-sectional view of the present invention. Figure 1 ;

[0022] Figure 3 This is a schematic cross-sectional view of the present invention. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 5 This is a schematic cross-sectional view of the present invention. Figure 3 ;

[0025] Figure 6 This is a schematic diagram showing a partial structural detail of the present invention.

[0026] In the diagram: 1. Pipeline; 2. Corrosion-resistant component; 201. Zinc block; 202. Connecting rod; 203. First isolation plate; 204. First drainage channel; 205. First connecting channel; 3. Drainage component; 301. Splicing pipe; 302. Inclined channel; 303. Sealing ring; 304. Movable plate; 305. Storage tank; 306. Positioning block; 307. Semicircular channel; 308. Second isolation plate; 309. Second drainage channel; 310. Second connecting channel; 4. Limiting block; 5. Spring; 6. Fixing block; 7. Limiting channel; 8. Support block; 9. Installation component; 901. Installation block; 902. Semicircular block; 903. Locking block; 10. Annular groove; 11. First vertical slide; 12. Rotating slide; 13. Second vertical slide. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-6This invention provides a technical solution: a high-efficiency, corrosion-resistant drill pipe for oil and gas extraction, comprising a pipe 1, an anti-corrosion component 2 disposed inside the pipe 1, and a drainage component 3 disposed above the pipe 1; the anti-corrosion component 2 includes a zinc block 201, which is fixedly installed at the inner end of the pipe 1, and a connecting rod 202 is fixedly installed at the inner end of the zinc block 201, extending through the upper end of the zinc block 201 and reaching the lower end of the zinc block 201. At the end of the connecting rod 202, a first isolation plate 203 is fixedly connected to the lower end. The outer end of the first isolation plate 203 is fixedly installed at the inner end of the pipe 1. A first drainage groove 204 is fixedly provided at the outer end of the first isolation plate 203. A first connecting groove 205 is fixedly provided at the outer end of the pipe 1. The first connecting groove 205 penetrates the outer end of the pipe 1 and extends to the inner end of the pipe 1. The first drainage groove 204 and the first connecting groove 205 are in corresponding positions and connected. The first drainage groove 204 and the first connecting groove 205 are arranged in a ring.

[0029] The drainage assembly 3 includes a splicing pipe 301, the lower end of which is fixedly installed on the upper end of a pipe 1. A sloping groove 302 is fixedly provided on the outer end of the pipe 1, penetrating the outer end of the splicing pipe 301 and extending to its inner end. The sloping groove 302 is annularly distributed. A sealing ring 303 is fixedly and movably installed on the inner end of the splicing pipe 301. A movable piece 304 is fixedly installed on the inner end of the sealing ring 303. A liquid storage tank 305 is fixedly provided on the outer end of the movable piece 304. A positioning block 306 is fixedly installed on the upper end of the movable piece 304. A semi-circular groove 307 is fixedly provided at the upper end of 306. A limiting block 4 is fixedly installed at the lower end of the movable piece 304. A spring 5 is movably installed at the outer end of the limiting block 4. A fixing block 6 is movably installed at the lower end of the outer end of the spring 5. A limiting groove 7 is fixedly provided at the upper end of the fixing block 6. The lower end of the spring 5 is movably installed at the inner end of the limiting groove 7. A support block 8 is fixedly installed at the outer end of the fixing block 6. The support blocks 8 are arranged in a ring. The outer end of the support block 8 is fixedly installed at the inner end of the pipe 1. The drainage assembly 3 also includes a second isolation piece 308, which is fixedly installed at... The lower end of the second isolation plate 308 is fixedly connected to the upper end of the connecting rod 202 at the inner end of the pipe 1. A second drainage groove 309 is fixedly installed at the outer end of the connecting rod 202. A second connecting groove 310 is fixedly installed at the outer end of the pipe 1. The second connecting groove 310 passes through the outer end of the pipe 1 and extends to the inner end of the pipe 1. The second connecting groove 310 corresponds to and communicates with the second drainage groove 309. An installation component 9 is installed below the pipe 1. When the pipe 1 enters the drilling process, seawater enters the first isolation plate 208 from the first drainage groove 204 and the first connecting groove 205 into the pipe 1. Between the second isolation plate 308, seawater, zinc block 201 and steel pipe 1 form a galvanic cell. Through the corrosion of zinc block 201 by seawater, the zinc block 201 is sacrificed to reduce the corrosion of pipe 1 by seawater. When the rod is pulled out of the well, the pipe 1 is pulled up by sliding along the inner wall of the pipe 1 through the sealing ring, so that the sealing ring moves to the bottom of the inclined groove 302, so that the seawater in the splicing pipe 301 is discharged from the inclined groove 302, so that the seawater does not accumulate inside, reducing the residual seawater, and making it easier for the pipe 1 to reduce its corrosion when stored or when not in drilling operations.

[0030] The mounting component 9 includes a mounting block 901, which is fixedly connected to the lower end of the pipe 1. A semi-circular block 902 is fixedly mounted on the lower end of the mounting block 901, and a locking block 903 is fixedly mounted on the outer end of the mounting block 901. An annular groove 10 is fixedly provided on the inner end of the upper end of the splicing pipe 301. A first vertical slide groove 11 is fixedly provided on the inner end of the annular groove 10. A rotating slide groove 12 is provided on the inner end of the first vertical slide groove 11, and a second vertical slide groove 13 is provided on the inner end of the rotating slide groove 12. When it is necessary to install and splice the pipe 1, the two pipes 1 are connected end to end. The semicircular block 902, the locking block 903, and the mounting block 901 are aligned with the splicing pipe 301, so that the semicircular block 902 fits into the semicircular groove 307. The upper pipe 1 is pressed down, causing the locking block 903 to slide and move downward in the first vertical slide groove 11 against the force of the spring 5 until it enters the rotating slide groove 12. Then, the upper pipe 1 is rotated, causing the locking block 903 in the rotating slide groove 12 to rotate and align with the second vertical slide groove 13. Under the force of the spring 5, the pipe 1 is pushed upward, so that the locking block 903 is locked in the inner end of the second vertical slide groove 13.

[0031] The inner end face of the semicircular groove 307 matches the outer end face of the semicircular block 902. The liquid storage tank 305 is annular and has a semicircular cross-section. The outer end face of the locking block 903 matches the inner end face of the first vertical groove and the outer end face of the locking block 903 matches the second vertical groove. The locking blocks 903 are arc-shaped and symmetrically distributed on the outer end of the connecting block.

[0032] Working principle: When it is necessary to install and splice pipe 1, the two ends of the two pipes 1 are connected end to end, so that the semi-circular block 902, the clamping block 903 and the installation block 901 are connected with the splicing pipe 301, so that the semi-circular block 902 fits into the semi-circular groove 307. The upper pipe 1 is pressed down, so that the clamping block 903 overcomes the force of the spring 5 and slides in the first vertical slide groove 11 and moves downward until it enters the rotating slide groove 12. Then the upper pipe 1 is rotated, so that the clamping block 903 in the rotating slide groove 12 rotates in the rotating slide groove 12 and corresponds to the second vertical slide groove 13. Under the force of the spring 5, the pipe 1 is pushed upward, so that the clamping block 903 is locked in the inner end of the second vertical slide groove 13.

[0033] When the pipeline 1 enters the drilling process, seawater enters the pipeline 1 from the first drainage tank 204 and the first connecting tank 205 between the first isolation plate 203 and the second isolation plate 308, so that the seawater, zinc block 201 and steel pipeline 1 form a galvanic cell. Through the corrosion of zinc block 201 by seawater, the corrosion of seawater on pipeline 1 is reduced by sacrificing zinc block 201.

[0034] When the pipe is pulled out of the well, the sealing ring slides up along the inner wall of the pipe 1 and moves to the bottom of the inclined groove 302, so that the seawater in the splicing pipe 301 is discharged from the inclined groove 302, so that the seawater does not accumulate inside and reduces the residual seawater. This makes it easier for the pipe 1 to reduce its corrosion when stored or when not in drilling operations.

[0035] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A high-efficiency, corrosion-resistant drill pipe for oil and gas extraction, comprising a pipe (1), characterized in that: The inside of the pipe (1) is provided with an anti-corrosion component (2), and the top of the pipe (1) is provided with a drainage component (3); The anti-corrosion component (2) includes a zinc block (201), which is fixedly installed at the inner end of the pipe (1). A connecting rod (202) is fixedly installed at the inner end of the zinc block (201). The connecting rod (202) passes through the upper end of the zinc block (201) and extends to the lower end of the zinc block (201). A first isolation plate (203) is fixedly connected to the lower end of the connecting rod (202). 03) The outer end is fixedly installed at the inner end of the pipe (1). The outer end of the first isolation plate (203) is fixedly provided with a first drain groove (204). The outer end of the pipe (1) is fixedly provided with a first connecting groove (205). The first connecting groove (205) penetrates the outer end of the pipe (1) and extends to the inner end of the pipe (1). The first drain groove (204) and the first connecting groove (205) are in corresponding positions and connected. The first drain groove (204) and the first connecting groove (205) are arranged in a ring.

2. The high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 1, characterized in that: The drainage assembly (3) includes a splicing pipe (301), the lower end of which is fixedly installed on the upper end of the pipe (1). An inclined groove (302) is fixedly provided on the outer end of the pipe (1). The inclined groove (302) penetrates the outer end of the splicing pipe (301) and extends to the inner end of the splicing pipe (301). The inclined groove (302) is distributed in a ring. A sealing ring (303) is fixedly and movably installed on the inner end of the splicing pipe (301). A movable piece (304) is fixedly installed on the inner end of the sealing ring (303). A liquid storage tank (305) is fixedly provided on the outer end of the movable piece (304). A positioning block (306) is fixedly installed on the upper end of the movable piece (304). A semi-circular groove (307) is fixedly provided on the upper end of the positioning block (306).

3. The high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 2, characterized in that: A limiting block (4) is fixedly installed at the lower end of the movable piece (304). A spring (5) is movably installed at the outer end of the limiting block (4). A fixing block (6) is movably installed at the lower end of the outer end of the spring (5). A limiting groove (7) is fixedly provided at the upper end of the fixing block (6). The lower end of the spring (5) is movably installed at the inner end of the limiting groove (7). A support block (8) is fixedly installed at the outer end of the fixing block (6). The support blocks (8) are arranged in a ring. The outer end of the support block (8) is fixedly installed at the inner end of the pipe (1).

4. The high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 3, characterized in that: The drainage assembly (3) further includes a second isolation plate (308), which is fixedly installed at the inner end of the pipe (1). The lower end of the second isolation plate (308) is fixedly connected to the upper end of the connecting rod (202). A second drainage groove (309) is fixedly provided at the outer end of the connecting rod (202). A second connecting groove (310) is fixedly provided at the outer end of the pipe (1). The second connecting groove (310) penetrates the outer end of the pipe (1) and extends to the inner end of the pipe (1). The second connecting groove (310) corresponds to and is connected to the second drainage groove (309). An installation assembly (9) is provided below the pipe (1).

5. The high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 4, characterized in that: The installation component (9) includes an installation block (901), which is fixedly connected to the lower end of the pipe (1). A semi-circular block (902) is fixedly installed at the lower end of the installation block (901), and a locking block (903) is fixedly installed at the outer end of the installation block (901).

6. The high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 2, characterized in that: The upper end of the splicing pipe (301) is fixedly provided with an annular groove (10), the inner end of the annular groove (10) is fixedly provided with a first vertical slide groove (11), the inner end of the first vertical slide groove (11) is provided with a rotating slide groove (12), and the inner end of the rotating slide groove (12) is provided with a second vertical slide groove (13).

7. The high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 2, characterized in that: The inner end face of the semicircular groove (307) matches the outer end face of the semicircular block (902), the liquid storage tank (305) is annular, and the cross-section of the liquid storage tank (305) is semicircular.

8. A high-efficiency, corrosion-resistant drill pipe for oil and gas extraction according to claim 5, characterized in that: The outer end face of the card block (903) matches the inner end face of the first vertical groove, and the outer end face of the card block (903) matches the second vertical groove. The card block (903) is arc-shaped and symmetrically distributed on the outer end of the connecting block.

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