Automatic oil supply lubrication anti-leakage pollution device for high-pressure test of oil-gas water well

Abstract

The invention discloses an oil-gas well high-pressure test automatic oil supply lubrication anti-leakage pollution device, and belongs to the technical field of oil-gas well logging engineering. According to the technical scheme, a lubricating section body used for supplying oil to a cable for lubrication is connected with a pressure guiding and drainage section body; the blowout prevention flow choking part is connected with the pressure guide and drainage section main body; a liquid gathering drainage cup is arranged between the blowout prevention flow choking part and the pressure guide drainage section main body; and the liquid receiving disc is connected with the lubricating section main body. The beneficial effects are that oil is automatically supplied for lubrication, and the problem of pollution caused by overflow and accumulation of lubricating grease manually coated on the cable surface is solved; liquid accumulated in the liquid gathering drainage cup naturally releases pressure in the inverted liquid gathering drainage cup, then freely falls into a liquid receiving plate and enters a ground recycling bin along a pipeline; the problems of pollution and high-pressure damage caused by leakage of the anti-spraying head during high-pressure testing are solved; the safety performance is good, the flow choking sealing filler adopts the polyurethane annular packing, the high-pressure performance is high, the elasticity is good, the sealing performance is high, high-pressure sealing can be effectively dealt with, and harm caused by high-pressure leakage can be prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of logging engineering for oil and gas wells, and particularly relates to an automatic oil supply, lubrication, anti-leakage and pollution prevention device for high-pressure testing of oil and gas wells. Background Art

[0002] In the logging industry of oil extraction, the well logging cable sealing blowout preventer pressure cap adopts a single-piece Φ6mm through-hole 45# steel material solid thread tightening pressure cap. In the prior art, the following problems exist in the on-site test construction process:

[0003] (1) High-pressure well fluid sprays out from the through-hole of the cable sealing blowout preventer pressure cap, causing high-pressure injury accidents to operators and equipment and environmental pollution incidents; especially in the initial stage when the instrument enters the well, due to the light weight of the instrument, if the sealing blowout preventer pressure cap is tightened a little, the instrument cannot go down, and it is difficult to lower the instrument into the well. The control degree of the sealing blowout preventer pressure cap is relatively loose, and sudden high-pressure fluid leakage and spraying are extremely likely to occur, resulting in high-pressure injury accidents and environmental pollution incidents, and it cannot be pre-controlled.

[0004] (2) On-site, the method of applying grease on the cable surface is adopted to increase lubrication and thus reduce the resistance of the instrument to be lowered. However, the grease applied on the cable drops to the ground due to the cable shaking, and the overflowing grease accumulates above the wellhead sealing blowout preventer pressure cap and then drops to the ground, causing environmental pollution. Summary of the Invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a high-pressure test anti-leakage and pollution prevention device for oil and gas wells, which can pre-control high-pressure injury accidents and environmental pollution incidents caused by sudden high-pressure fluid leakage and spraying during cable logging, and has an automatic oil supply and lubrication function, effectively realizing the environmental protection construction standard of "no leakage on site, environmental protection and no pollution".

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An automatic oil supply, lubrication, anti-leakage and pollution prevention device for high-pressure testing of oil and gas wells, comprising:

[0008] A lubrication section main body for supplying oil and lubricating the cable, connected to the pressure guiding and drainage section main body;

[0009] A blowout preventer and flow blocker, connected to the pressure guiding and drainage section main body;

[0010] A liquid collecting and drainage cup is provided between the blowout preventer and flow blocker and the pressure guiding and drainage section main body;

[0011] A liquid receiving tray, connected to the lubrication section main body.

[0012] Further, the lubrication section main body includes:

[0013] Hexagonal adjustment section with a central through-hole inside;

[0014] Grease pushing spring, built inside the hexagonal adjustment section;

[0015] Grease filling chamber, arranged below the grease pushing spring;

[0016] Grease pushing baffle, movably arranged up and down in the grease filling chamber, with a central through-hole on the grease pushing baffle.

[0017] Further, the upper part of the hexagonal adjustment section is provided with a connecting thread for the main body of the lubricating section, and the lower part is provided with a connecting thread for the main body of the lubricating section at the bottom.

[0018] Further, the main body of the pressure guiding and drainage section is provided with a pressure guiding hole;

[0019] Inside the main body of the pressure guiding and drainage section, there is an anti-blowout and flow-blocking stuffing box and a pressure guiding chamber.

[0020] Further, the lower part of the main body of the pressure guiding and drainage section is provided with a lower connecting thread for the pressure guiding and drainage section for connecting with the main body of the lubricating section, and the upper part of the main body of the pressure guiding and drainage section is provided with an upper connecting thread for the pressure guiding and drainage section;

[0021] Further, the anti-blowout and flow-blocking part includes:

[0022] Anti-blowout and flow-blocking plate, arranged in the anti-blowout and flow-blocking stuffing box, with a central through-hole on the anti-blowout and flow-blocking plate;

[0023] Hexagonal anti-blowout and flow-blocking compression cap, arranged above the anti-blowout and flow-blocking stuffing box, with a central through-hole in the hexagonal anti-blowout and flow-blocking compression cap.

[0024] Further, the hexagonal anti-blowout and flow-blocking compression cap is provided with a connecting thread for the hexagonal anti-blowout and flow-blocking compression cap that is screwed tightly through the central through-hole of the liquid collecting and draining cup and the upper connecting thread of the pressure guiding and drainage section.

[0025] Further, a liquid collecting chamber is arranged inside the liquid receiving tray; a drainage joint is arranged below the liquid receiving tray.

[0026] Further, the liquid receiving tray is seam-welded to the main body of the lubricating section, and the liquid receiving tray is seamlessly welded to the drainage joint.

[0027] Further, connect the upper connecting thread of the main body of the lubricating section with the lower connecting thread of the pressure guiding and drainage section of the main body of the pressure guiding and drainage section. The grease pushing baffle moves up and down in the grease filling chamber. The grease pushing spring relies on the spring elasticity to push the grease pushing baffle to extrude the grease in the grease filling chamber to contact the cable, automatically supplying oil and lubricating the cable.

[0028] Advantages of the present invention:

[0029] Compared with the prior art, the high-pressure test anti-leakage and pollution prevention device for oil and gas wells of the present invention has the following advantages:

[0030] (1) The design of the sealed automatic oil supply lubrication chamber relies on the natural tension of the spring to push the baffle plate, squeezing the grease in the grease filling chamber to contact the cable, realizing automatic oil supply and lubrication, and solving the problem of overoverflow and accumulation of grease smeared on the cable surface by manual operation and the resulting ground pollution;

[0031] (2) It can pre-control the high-pressure damage and leakage pollution caused by the sudden leakage of high-pressure liquid in the well from the annular gap between the cable and the sealing packing. The suddenly leaked liquid enters the flow-condensing and pressure-guiding section, is blocked by the flow-blocking baffle plate and the flow-blocking sealing packing, then falls back into the liquid accumulation chamber of the flow-condensing and pressure-guiding section, flows out from the drainage and pressure-guiding holes, and enters the liquid-accumulating and drainage cup; the liquid accumulated in the liquid-accumulating and drainage cup is naturally depressurized in the liquid-accumulating and drainage cup installed upside down and then freely falls into the liquid receiving tray, and then enters the ground recovery barrel along the pipeline; it solves the problems of pollution and high-pressure damage caused by anti-spray head leakage during high-pressure testing;

[0032] (3) It has good safety performance. The main materials of the compression nut, liquid-accumulating and drainage cup, flow-blocking baffle plate, flow-condensing section main body, spring baffle plate, and grease filling chamber are 45# steel, and the flow-blocking sealing packing is a polyurethane annular packing. It has strong high-pressure performance, good elasticity and strong sealing performance, and can effectively cope with high-pressure sealing and prevent the hazards caused by high-pressure leakage. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0034] Figure 1 Schematic diagram of problems existing in the prior art;

[0035] Figure 2 Assembly schematic diagram of the present invention;

[0036] Figure 3 Part assembly drawing of the present invention;

[0037] Figure 4 For Figure 3 A-A sectional view;

[0038] Figure 5 For Figure 3 B-B sectional view;

[0039] Description of the attached reference numerals: 101 - main body of the lubrication section, 102 - hexagonal adjustment section, 103 - lower connecting thread of the lubrication section main body, 104 - middle through hole, 105 - grease pushing spring, 106 - grease pushing baffle, 107 - grease filling chamber, 108 - middle through hole of the grease pushing baffle, 109 - upper connecting thread of the lubrication section main body, 201 - main body of the pressure guiding and drainage section, 202 - pressure guiding hole, 203 - pressure guiding chamber, 204 - lower connecting thread of the pressure guiding and drainage section, 205 - upper connecting thread of the pressure guiding and drainage section, 206 - blowout prevention and flow resistance packing chamber, 301 - liquid collecting and drainage cup, 401 - blowout prevention and flow resistance plate, 402 - middle through hole of the blowout prevention and flow resistance plate, 403 - hexagonal connection thread of the blowout prevention and flow resistance pressure cap, 404 - middle through hole of the hexagonal blowout prevention and flow resistance pressure cap, 405 - hexagonal blowout prevention and flow resistance pressure cap, 501 - liquid receiving tray, 502 - drainage joint, 503 - liquid collecting bin. Detailed implementation mode

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The following is in conjunction with the attached Figures 1-5 A further description is made of the automatic oil supply, lubrication, leakage prevention and pollution prevention device for high-pressure testing of oil and gas wells.

[0041] The technical solution adopted by the present invention to solve its technical problems is an automatic oil supply, lubrication, leakage prevention and pollution prevention device for high-pressure testing of oil and gas wells. The automatic oil supply, lubrication, leakage prevention and pollution prevention device for high-pressure testing of oil and gas wells includes a main body 101 of the lubrication section, a hexagonal adjustment section 102, a lower connecting thread 103 of the main body of the lubrication section, a middle through hole 104, a grease pushing spring 105, a grease pushing baffle 106, a grease filling chamber 107, a middle through hole 108 of the grease pushing baffle, an upper connecting thread 109 of the main body of the lubrication section, a main body 201 of the pressure guiding and drainage section, a pressure guiding hole 202, a pressure guiding chamber 203, a lower connecting thread 204 of the pressure guiding and drainage section, an upper connecting thread 205 of the pressure guiding and drainage section, a blowout prevention and flow resistance packing chamber 206, a liquid collecting and drainage cup 301, a blowout prevention and flow resistance plate 401, a middle through hole 402 of the blowout prevention and flow resistance plate, a hexagonal connection thread 403 of the blowout prevention and flow resistance pressure cap, a middle through hole 404 of the hexagonal blowout prevention and flow resistance pressure cap, a hexagonal blowout prevention and flow resistance pressure cap 405, a liquid receiving tray 501, a drainage joint 502, and a liquid collecting bin 503.

[0042] The main body 101 of the lubricating section includes a hexagonal adjustment section 102, a lower connecting thread 103 of the main body of the lubricating section, a through hole 104 in the middle of the main body of the lubricating section, a grease pushing spring 105, a grease pushing baffle 106, a grease adding chamber 107, a through hole 108 in the middle of the grease pushing baffle, and an upper connecting thread 109 of the main body of the lubricating section. Among them, the lower connecting thread 103 of the main body of the lubricating section is screwed and connected with the sealing packing chamber of the blowout prevention plug. Grease is added to the grease adding chamber 107, and the grease pushing baffle 106 and the grease pushing spring 105 are sequentially installed. The upper connecting thread 109 of the main body of the lubricating section is screwed and connected with the lower connecting thread 204 of the pressure guiding and drainage section. The grease pushing baffle 106 can move up and down in the grease adding chamber 107. The grease pushing spring 105 relies on the elasticity of the spring to push the grease pushing baffle 106 to extrude the grease in the grease adding chamber 107 to contact the cable, automatically supplying oil and lubricating the cable.

[0043] The main body 201 of the pressure guiding and drainage section includes a pressure guiding hole 202, a pressure guiding chamber 203, a lower connecting thread 204 of the pressure guiding and drainage section, an upper connecting thread 205 of the pressure guiding and drainage section, and a blowout prevention and flow resistance packing chamber 206. Among them, the lower connecting thread 204 of the pressure guiding and drainage section is screwed and connected with the upper connecting thread 109 of the main body of the lubricating section.

[0044] The liquid collecting and draining cup 301 is located between the main body 201 of the pressure guiding and drainage section and the hexagonal blowout prevention and flow resistance pressure cap 405. The connecting thread 403 of the hexagonal blowout prevention and flow resistance pressure cap passes through the through hole in the liquid collecting and draining cup 301 and is screwed and connected with the upper connecting thread 205 of the pressure guiding and drainage section.

[0045] The blowout prevention and flow resistance part includes a blowout prevention and flow resistance plate 401, a through hole 402 in the blowout prevention and flow resistance plate, a connecting thread 403 of the hexagonal blowout prevention and flow resistance pressure cap, a through hole 404 in the middle of the hexagonal blowout prevention and flow resistance pressure cap, and a hexagonal blowout prevention and flow resistance pressure cap 405. Among them, the connecting thread 403 of the hexagonal blowout prevention and flow resistance pressure cap passes through the through hole in the liquid collecting and draining cup 301 and is screwed and connected with the upper connecting thread 205 of the pressure guiding and drainage section.

[0046] The liquid receiving tray 501 includes a drainage joint 502 and a liquid collecting chamber 503. Among them, the liquid receiving tray 501 is seamlessly welded to the main body 101 of the lubricating section, and the liquid receiving tray 501 is seamlessly welded to the drainage joint 502.

[0047] When the automatic oil supply, lubrication, leakage prevention and pollution prevention device for high-pressure testing of oil and gas wells works properly, the high-pressure leakage suddenly occurring in the well enters the pressure guiding chamber 203, is sealed and blocked by the blowout prevention and flow resistance plate 401 and the blowout prevention and flow resistance packing in the blowout prevention and flow resistance stuffing box 206, enters the liquid accumulation and drainage cup 301 through the pressure guiding hole 202 for natural pressure relief, naturally falls vertically into the liquid accumulation chamber 503 of the liquid receiving tray 501 after pressure relief, accumulates, is discharged from the drainage joint 502, flows into the pipeline, and enters the ground recovery device for pre-control to avoid the formation of high-pressure leakage. It effectively protects the safety of equipment, personnel and the surrounding environment.

[0048] The usage method of the automatic oil supply, lubrication, leakage prevention and pollution prevention device for high-pressure testing of oil and gas wells described in the present invention includes the following steps:

[0049] 1. When used on-site, the logging cable is successively passed through the through hole 404 in the hexagonal blowout prevention and flow resistance cap, the through hole 402 in the blowout prevention and flow resistance plate, the through hole 108 in the grease pushing baffle, the through hole 104 in the lubrication section main body and the through hole in the blowout prevention plug main body. The lower connection thread 103 of the lubrication section main body is screwed tightly with the sealing stuffing box thread of the blowout prevention plug main body.

[0050] 2. Separate the pressure guiding and drainage section main body 201 from the lubrication section main body 101, successively take out the grease pushing spring 105 and the grease pushing baffle 106, add an appropriate amount of grease into the grease adding chamber 107, successively install the grease pushing baffle 106 and the grease pushing spring 105 into the grease adding chamber 107, and screw the upper connection thread 109 of the lubrication section main body tightly with the lower connection thread 204 of the pressure guiding and drainage section.

[0051] 3. Add an appropriate amount of polyurethane sealing packing into the blowout prevention and flow resistance stuffing box 206, and screw the connection thread 403 of the hexagonal blowout prevention and flow resistance cap through the through hole in the liquid accumulation and drainage cup 301 tightly with the upper connection thread 205 of the pressure guiding and drainage section.

[0052] 4. Connect the pipeline of the ground recovery device with the drainage joint 502.

[0053] 5. Observe the running condition of the cable entering the well, check the tight connection condition of the lower connection thread 103 of the lubrication section main body and the sealing stuffing box thread of the blowout prevention plug main body, and whether the logging cable runs into the well normally.

[0054] In 2022, 4 sets of this device were put into use in the Tertiary Oil Recovery Experiment Brigade of Shenyang Oil Production Plant, Liaohe Oilfield Company, and the running state was good.

[0055] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. An automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells, Characterized in that, Comprising: A lubrication section main body (101) for supplying oil and lubrication to the cable, connected to the pressure guiding and drainage section main body (201); An anti-blowout and flow-blocking part, connected to the pressure guiding and drainage section main body (201); A liquid accumulation and drainage cup (301) is provided between the anti-blowout and flow-blocking part and the pressure guiding and drainage section main body (201); A liquid receiving tray (501), connected to the lubrication section main body (101).

2. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells according to claim 1, Characterized in that, The lubrication section main body (101) comprises: A hexagonal adjustment section (102) with a central through hole (104) inside; A grease pushing spring (105), built inside the hexagonal adjustment section (102); A grease adding chamber (107), arranged below the grease pushing spring (105); A grease pushing baffle (106), which can move up and down in the grease adding chamber (107), and a grease pushing baffle central through hole (108) is provided on the grease pushing baffle (106).

3. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells according to claim 2, Characterized in that, The hexagonal adjustment section (102) is provided with a lubrication section main body upper connection thread (109) at its upper part and a lubrication section main body lower connection thread (103) at its lower part.

4. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells according to claim 1, Characterized in that, A pressure guiding hole (202) is provided on the pressure guiding and drainage section main body (201); An anti-blowout and flow-blocking packing chamber (206) and a pressure guiding chamber (203) are arranged inside the pressure guiding and drainage section main body (201).

5. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells according to claim 4, Characterized in that, The pressure guiding and drainage section main body (201) is provided with a pressure guiding and drainage section lower connection thread (204) for connecting with the lubrication section main body (101) at its lower part and a pressure guiding and drainage section upper connection thread (205) at its upper part.

6. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells according to claim 4, Characterized in that, The anti-blowout and flow-blocking part comprises: An anti-blowout and flow-blocking plate (401), arranged in the anti-blowout and flow-blocking packing chamber (206), and an anti-blowout and flow-blocking plate central through hole (402) is provided on the anti-blowout and flow-blocking plate (401); A hexagonal anti-blowout and flow-blocking compression cap (405), arranged above the anti-blowout and flow-blocking packing chamber (206), and a hexagonal anti-blowout and flow-blocking compression cap central through hole (404) is provided in the hexagonal anti-blowout and flow-blocking compression cap (405).

7. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells according to claim 6, Characterized in that, The hexagonal anti-blowout and flow-blocking compression cap (405) is provided with a hexagonal anti-blowout and flow-blocking compression cap connection thread (403) that is screwed tightly with the pressure guiding and drainage section upper connection thread (205) through the central through hole of the liquid accumulation and drainage cup (301).

8. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells as described in claim 1, characterized in that, a liquid collecting bin (503) is arranged inside the liquid receiving tray (501); a drainage connector (502) is arranged below the liquid receiving tray (501).

9. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells as described in claim 5, characterized in that, the liquid receiving tray (501) is seamlessly welded to the lubrication section main body (101), and the liquid receiving tray (501) is seamlessly welded to the drainage connector (502).

10. The automatic oil supply, lubrication, anti-leakage and anti-pollution device for high-pressure testing of oil and gas wells as described in claim 3, characterized in that, the connecting thread (109) on the lubrication section main body is connected to the lower connecting guide pressure and drainage section main body (201) of the guide pressure and drainage section. The grease pushing baffle (106) moves up and down in the grease adding chamber (107). The grease pushing spring (105) relies on the elasticity of the spring to push the grease pushing baffle (106) to extrude the grease in the grease adding chamber (107) to contact the cable, automatically supplying oil and lubricating the cable.

Images