Water jet cutter device, water jet cutting machine and method for cutting oil-gas well in coal-oil-gas superposition area

Abstract

The invention discloses a water jet cutter device, a water jet cutting machine and a method for cutting an oil-gas well in a coal-oil-gas overlapping area. The water jet cutter device comprises a clamp component, a connecting rod component, a water spraying pipe head and a connecting water pipe. The inner diameter of the clamp component is adjusted according to the outer diameter of the oil-gas well, so that the clamp component can be tightly hooped on the outer circumferential surface of the oil-gas well; the connecting rod component consists of a connecting part and a rotating part capable of circumferentially rotating on the connecting part; the connecting part is fixedly connected with the hoop part; the water spraying pipe head is inserted into the rotating part, and a high-pressure water column ejected from the water spraying pipe head can vertically hit on the outer circumferential surface of the oil and gas well, so that the high-pressure water column can horizontally cut the oil and gas well; the water spraying pipe head is communicated with high-pressure equipment through the connecting water pipe, an operator drives the water spraying pipe head to swing together by swinging the connecting water pipe, and then a spraying area with a fan-shaped section is formed. The water jet cutter is used for cutting an oil and gas well pipeline, no spark is generated, the safety coefficient is high, and the safety requirement of an underground coal mine is better met.

Description

Technical Field

[0001] The invention relates to a water jet device for cutting an oil and gas well in a coal, oil and gas superimposed area, belonging to the technical field of water jet cutting machines. Background Art

[0002] my country's Ordos Basin, Xinjiang's Tarim Basin, and Junggar Basin are comprehensive resource basins where multiple mineral resources such as coal, oil, and gas overlap vertically. At present, the development of coal and oil and gas mineral resources is still dominated by a single mineral (or a single industry). This single development model of oil and gas priority or coal priority not only causes a huge waste of multiple symbiotic minerals, but also causes coal and oil and gas to affect each other during the mining process. Since the coal seam is located in the shallow part of the formation and the oil and gas layer is located in the deep part of the formation (below the coal seam), abandoned vertical oil and gas wells may be exposed during the mining process of the coal mine working face. At this time, the correct method is needed to cut the oil and gas well pipeline to ensure the safe and smooth mining of coal mine resources. This method is of great significance for the coordinated mining of the upper coal seam and the lower oil and gas resources.

[0003] Currently, angle grinders are usually used to cut oil and gas wells. However, sparks are generated during the cutting process, which poses a great safety hazard and does not meet the safety requirements of underground coal mine operations. In addition, the angle grinders produce waste smoke and exhaust gas during the friction with the oil and gas wells, which does not meet environmental protection requirements. Even long-term breathing of waste smoke and exhaust gas by operators can cause harm to the human body. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a water jet device and method for cutting oil and gas wells in coal, oil and gas overlapping areas. Compared with the traditional angle grinder cutting method, the use of water jet to cut oil and gas well pipelines does not generate sparks, has a high safety factor, and is more in line with the safety requirements of underground coal mines. At the same time, the operator can perform remote control, which improves safety and further reduces labor intensity. No waste smoke or waste gas is generated during the water jet cutting process, and the consumables are only water and sand, which meets environmental protection requirements.

[0005] The present invention is implemented according to the following technical solutions: In a first aspect, the present invention provides a water jet device for cutting an oil and gas well in a coal, oil and gas overlapping area, comprising: The clamp component adjusts its inner diameter according to the outer diameter of the oil and gas well, so that the clamp component can be tightly clamped on the outer circumferential surface of the oil and gas well; The connecting rod component is composed of a connecting portion and a rotating portion capable of circumferentially rotating on the connecting portion; wherein the connecting portion is fixedly connected to the clamp component; A water jet head is inserted into the rotating part, and the water jet from the water jet head can vertically hit the outer circumference of the oil and gas well, so that the oil and gas well can be cut horizontally; The water pipe is connected, and the water spray pipe head is connected to the high-pressure water outlet device through the water pipe. The operator drives the water spray pipe head to swing together by swinging the water pipe, thereby forming a spray area with a fan-shaped cross-section.

[0006] In some embodiments, the clamp component includes: A flexible connector capable of being wound around the outer circumference of the oil and gas well; A rigid connector, whose side elevation facing the oil and gas well is an arc-shaped surface, used to fit on the outer circumferential surface of the oil and gas well, and one lateral end of the rigid connector is hinged to a free end of the flexible connector, and the other lateral end of the rigid connector is set as a clamping portion; The locking component is connected between the other free end of the flexible connector and the clamping portion, and is used to adjust the inner diameter of the ring formed by the flexible connector and the rigid connector, and to lock the flexible connector and the rigid connector on the outer circumferential surface of the oil and gas well.

[0007] In some embodiments, the locking component comprises: A threaded column, one end of which is hinged to the flexible connector, and a middle area of ​​which is clamped in the clamping portion, with a clearance fit between the two; The threaded sleeve is composed of a hollow internally threaded casing and a handle, and has an overall T-shaped structure. The internally threaded casing is screwed into the threaded column. When the handle is rotated, the internally threaded casing is driven to rotate together. Under the action of the internal and external threads, the internally threaded casing converts the circumferential rotational motion into axial linear motion to push the clamping part toward the oil and gas well, thereby tightening the flexible connector and the rigid connector on the outer circumferential surface of the oil and gas well.

[0008] In some embodiments, the rigid connector is composed of a right-angled triangular plate whose hypotenuse is set as a concave arc edge and a U-shaped clamping plate located at the right angle of the right-angled triangular plate, which are integrally cast or welded, and the U-shaped clamping plate is used as the clamping part; a through hole for cooperating with the use is provided in the central area of ​​the right-angled triangular plate, and a reamed hole for inserting a pin shaft for hinged connection with the flexible connector is provided at an acute angle of the right-angled triangular plate.

[0009] In some embodiments, the connecting rod component includes: A vertically arranged connecting rod, the top of which is connected to the clamp component via a first fastener; A horizontally arranged support rod, one end of which is fixed to the bottom of the connecting rod; A vertically arranged rotating rod is located below the support rod, the top of the rotating rod is connected to the middle area of ​​the support rod through a second fastener, and the rotating rod can rotate circumferentially around its center point; a radial through hole is provided in the middle area of ​​the outer circumferential surface of the rotating rod, the water spray pipe head is inserted into the radial through hole, and the water spray pipe head is fixed by a third fastener.

[0010] In some embodiments, the top of the connecting rod is configured as a stepped head with an external thread, and the stepped head is inserted into the through hole of the clamp component from bottom to top; the first fastener is a nut, which is tightened on the stepped head, pressing the shoulder at the stepped head against the clamp component, thereby fixing the connecting rod and the clamp component together.

[0011] In some embodiments, a vertically arranged through hole is opened in the middle area of ​​the support rod, and an axial internal threaded blind hole coaxially arranged with the through hole is provided in the central area of ​​the axial top surface of the rotating rod; the second fastener is a screw, and its threaded rod portion is inserted into the through hole from top to bottom and tightened in the axial internal threaded blind hole; the threaded rod portion of the screw and the through hole are clearance-matched, and the length of the threaded rod portion of the screw is greater than the combined depth of the through hole and the axial internal threaded blind hole, so that the rotating rod and the screw can move axially on the support rod, thereby realizing the circumferential rotation function of the rotating rod; an axial internal threaded mounting hole connected to the radial through hole is provided in the central area of ​​the axial bottom surface of the rotating rod; the third fastener is a screw, and its threaded rod portion is screwed into the axial internal threaded mounting hole and tightened on the water sprinkler head, thereby fixing the water sprinkler head with the adjusted distance between the end of the water sprinkler head and the outer circumferential surface of the oil and gas well on the rotating rod.

[0012] In a second aspect, the present invention provides a cutting method based on the above-mentioned water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas: Determine the pre-cutting position on the outer circumference of the oil and gas well and mark the cutting position; Tighten the clamp assembly onto the oil and gas well above the cutting position mark; After adjusting the position of the connecting rod component, fix it on the clamp component; After adjusting the distance between the water spray pipe head and the outer circumferential surface of the oil and gas well, fix it on the connecting rod component; Two operators are required for cutting, one is responsible for operating the high-voltage equipment and observing its operating status, and the other is responsible for cutting; Open the water inlet valve, and start the high-pressure water outlet device after water flows out of the water spray pipe head. When the mortar jet is basically formed, start cutting. During the cutting process, the operator swings the connecting water pipe to form a fan-shaped jet from the straight jet. After cutting is completed, the incision of the oil and gas well is sealed to prevent gas leakage.

[0013] In a third aspect, the present invention provides a water jet cutting machine, comprising a high-pressure water outlet device and the above-mentioned water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas.

[0014] In a fourth aspect, the present invention provides a construction method based on the above-mentioned water jet cutting machine, which is mainly divided into the following steps: Step 1: Preparation work before uncovering the oil and gas well casing; Step 2: Exploration and exposure of oil and gas wells during the mining process at the coal mine working face; Step 3: Transportation of underground water jet cutting machine; Step 4: Preparation before installing the water jet cutting machine; Step 5: Installation of underground water jet cutting machine; Step 6: Downhole water jet cutting machine test; Step 7: Cutting of underground oil and gas pipelines; Step 8: Recovery of underground water jet cutting machine.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Compared with the traditional angle grinder cutting method, using water jet to cut oil and gas well pipelines does not generate sparks, has a high safety factor, and is more in line with the safety requirements of underground coal mine operations.

[0016] Compared with the traditional angle grinder cutting method, the use of water jet cutting of oil and gas well pipelines allows operators to perform remote control, improve safety, and further reduce labor intensity.

[0017] Compared with the traditional angle grinder cutting method, the use of water jet to cut oil and gas well pipelines does not produce waste smoke or exhaust gas, and the only consumables are water and sand, which meets environmental protection requirements.

[0018] Compared with the traditional water jet cutting method with complex structure (such as the disclosed technical solutions CN206105050U, CN217801096U, etc.), the water jet device provided by the present invention has the advantages of simple structure, low production cost, convenient and quick assembly and disassembly, simple angle adjustment, stable clamping, high overall strength, and greatly improved work efficiency.

[0019] The water jet cutting machine provided by the present invention enables the coal mining face to be smoothly pushed and mined, and the upper coal seam in the coal, oil and gas superimposed area to be smoothly mined, thus forming a comprehensive, safe and reliable coal mining pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0021] In the attached picture: Figure 1 The overall structure of the water jet device for cutting oil and gas wells in the coal, oil and gas overlapping area of ​​the present invention is schematically shown. Figure 1 ; Figure 2 The overall structure of the water jet device for cutting oil and gas wells in the coal, oil and gas overlapping area of ​​the present invention is schematically shown. Figure 2 ; Figure 3 Three views of the overall structure of the water jet device for cutting oil and gas wells in the coal, oil and gas overlapping area of ​​the present invention (a is the main view, b is the side view, and c is the top view); Figure 4 A partial cross-sectional view of a water jet device for cutting an oil and gas well in a coal, oil and gas overlap zone according to the present invention Figure 1 ; Figure 5 A partial cross-sectional view of a water jet device for cutting an oil and gas well in a coal, oil and gas overlap zone according to the present invention Figure 2 ; Figure 6 Schematic diagram of the overall structure of the rigid connector of the present invention (a is a three-dimensional diagram, b is a top view).

[0022] Figures are marked: 1-clamp component, 2-connecting rod component, 3-sprinkler head, 4-connecting water pipe, 5-oil and gas well; 11-flexible connector, 12-rigid connector, 13-locking component; 121-right triangle plate, 122-U-shaped card plate, 123-through hole, 124-reaming hole; 131-threaded column, 132-threaded sleeve; 21-connecting rod, 22-supporting rod, 23-rotating rod; 211-Nut, 221-Screw, 231-Screw.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas comprises a clamp component 1, a connecting rod component 2, a water jet pipe head 3 and a connecting water pipe 4; the clamp component 1 adjusts its inner diameter size according to the outer diameter size of the oil and gas well 5, so that the clamp component 1 can be tightly clamped on the outer circumferential surface of the oil and gas well 5; the connecting rod component 2 consists of a connecting portion and a rotating portion that can rotate circumferentially on the connecting portion; wherein the connecting portion is fixedly connected to the clamp component 1; the water jet pipe head 3 is inserted into the rotating portion, and the water column ejected from the water jet pipe head 3 can vertically hit the outer circumferential surface of the oil and gas well 5, so that it can horizontally cut the oil and gas well 5; the water jet pipe head 3 is connected to the high-pressure water outlet equipment through the connecting water pipe 4, and the operator drives the water jet pipe head to swing together by swinging the connecting water pipe 4, thereby forming a spraying area with a fan-shaped cross-section.

[0028] The specific structure of the above-mentioned clamp component is further described below.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the clamp component 1 includes a flexible connector 11, a rigid connector 12 and a locking component 13; the flexible connector 11 can be wound around the outer circumferential surface of the oil and gas well 5; the side elevation of the rigid connector 12 facing the oil and gas well 5 is an arcuate surface, which is used to fit on the outer circumferential surface of the oil and gas well 5, and one lateral end of the rigid connector 12 is hinged to a free end of the flexible connector 11, and the other lateral end of the rigid connector 12 is set as a clamping portion; the locking component 13 is connected between the other free end of the flexible connector 11 and the clamping portion, and is used to adjust the inner diameter size of the ring formed by the flexible connector 11 and the rigid connector 12, and lock the flexible connector 11 and the rigid connector 12 on the outer circumferential surface of the oil and gas well 5.

[0030] It should be noted that the drawings show a preferred embodiment of the flexible connector 11, which is a chain. Of course, in actual use, the flexible connector 11 is not limited to the above-mentioned chain, but can also be a steel wire rope.

[0031] The specific structure of the above-mentioned clamp component is further described below.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the locking component 13 includes a threaded column 131 and a threaded sleeve 132; one end of the threaded column 131 is hinged to the flexible connector 11, and the middle area is clamped in the clamping portion, and the gap between the two is matched; the threaded sleeve 132 is composed of a hollow internally threaded sleeve and a handle, and the whole is a T-shaped structure. The internally threaded sleeve is screwed into the threaded column 131, and the internally threaded sleeve is driven to rotate together after rotating the handle. Under the action of the internal and external threads, the internally threaded sleeve converts the circumferential rotational motion into axial linear motion to push the clamping portion toward the oil and gas well, thereby tightening the flexible connector 11 and the rigid connector 12 on the outer circumferential surface of the oil and gas well 5.

[0033] The specific structure of the above-mentioned rigid connecting member is further described below.

[0034] like Figure 6 As shown, the rigid connector 12 is composed of a right-angled triangular plate 121 whose hypotenuse is set as an inward concave arc edge and a U-shaped clamping plate 122 located at the right angle of the right-angled triangular plate 121, which is cast or welded as one piece, and the U-shaped clamping plate 122 is used as a clamping part; a through hole 123 for coordinated use is provided in the central area of ​​the right-angled triangular plate 121, and a reamed hole 124 for inserting a pin shaft for hinged connection with the flexible connector 11 is provided at an acute angle of the right-angled triangular plate 121.

[0035] The specific structure of the above-mentioned connecting rod component is further described below.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the connecting rod component 2 includes a vertically arranged connecting rod 21, a horizontally arranged supporting rod 22 and a vertically arranged rotating rod 23; the top of the connecting rod 21 is connected to the clamp component 1 through a first fastener; one end of the supporting rod 22 is fixed to the bottom of the connecting rod 21; the rotating rod 23 is located below the supporting rod 22, and the top of the rotating rod 23 is connected to the middle area of ​​the supporting rod 22 through a second fastener, and the rotating rod 23 can rotate circumferentially around its center point; a radial through hole is provided in the middle area of ​​the outer circumferential surface of the rotating rod 23, and the water spray pipe head 3 is inserted into the radial through hole, and the water spray pipe head 3 is fixed by a third fastener.

[0037] In a further solution, the top of the connecting rod 21 is set as a stepped head with an external thread, and the stepped head is inserted from bottom to top into the through hole 123 of the right-angled triangular plate 121; the first fastener is a nut 211, which is tightened on the stepped head, and the shoulder at the stepped head is pressed against the right-angled triangular plate 121, thereby fixing the connecting rod 21 and the right-angled triangular plate 121 together.

[0038] A further solution is that a vertically arranged through hole is opened in the middle area of ​​the support rod 22, and an axial internal threaded blind hole coaxially arranged with the through hole is opened in the central area of ​​the axial top surface of the rotating rod 23; the second fastener is a screw 221, and its threaded rod portion is inserted into the through hole from top to bottom and then tightened in the axial internal threaded blind hole; the threaded rod portion of the screw 221 is clearance-matched with the through hole, and the length of the threaded rod portion of the screw 221 is greater than the combined depth of the through hole and the axial internal threaded blind hole, so that the rotating rod 23 and the screw 221 can move axially on the support rod 22, thereby realizing the circumferential rotation function of the rotating rod 23.

[0039] In a further solution, an axial internal threaded mounting hole connected to the radial through hole is provided in the central area of ​​the axial bottom surface of the rotating rod 23; the third fastener is a screw 231, and its threaded rod portion is screwed into the axial internal threaded mounting hole and then tightened on the water sprinkler head 3, thereby fixing the water sprinkler head 3 with the adjusted distance between the end of the water sprinkler head 3 and the outer circumferential surface of the oil and gas well 5 on the rotating rod 23.

[0040] In summary, the present invention provides a water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas. Compared with the traditional angle grinder cutting method, the use of a water jet to cut oil and gas well pipelines does not generate sparks, has a high safety factor, and is more in line with the safety requirements of underground coal mines. At the same time, the operator can perform remote control to further reduce labor intensity. No waste smoke or waste gas is generated during the water jet cutting process, and the consumables are only water and sand, which meets environmental protection requirements.

[0041] The present invention also provides a cutting method based on the above-mentioned water jet device for cutting oil and gas wells in the coal, oil and gas overlapping area, the specific contents of which are as follows: Determine the pre-cutting position on the outer circumference of the oil and gas well and mark the cutting position; Tighten the clamp assembly onto the oil and gas well above the cutting position mark; After adjusting the position of the connecting rod component, fix it on the clamp component; After adjusting the distance between the water spray pipe head and the outer circumferential surface of the oil and gas well, fix it on the connecting rod component; Two operators are required for cutting, one is responsible for operating the high-voltage equipment and observing its operating status, and the other is responsible for cutting; Open the water inlet valve, start the high-pressure equipment after water flows out of the water spray pipe head, and start cutting when the mortar jet is basically formed; during the cutting process, the operator swings the connecting water pipe to form a fan-shaped jet from the straight jet; After cutting is completed, the incision of the oil and gas well is sealed to prevent gas leakage.

[0042] The water jet cutting machine provided by the present invention is described below. The water jet cutting machine described below and the water jet cutting device for cutting oil and gas wells in coal, oil and gas overlapping areas described above can be referred to each other.

[0043] A water jet cutting machine provided by the present invention may include a water jet device for cutting oil and gas wells in a coal, oil and gas overlapping area as described in any one of the above embodiments.

[0044] The beneficial effects achieved by the water jet cutting machine provided by the present invention are consistent with the beneficial effects achieved by the water jet device provided by the present invention for cutting oil and gas wells in coal, oil and gas overlapping areas, and will not be described in detail here.

[0045] The present invention also provides a construction method based on the above-mentioned water jet cutting machine, the specific contents of which are as follows: Step 1: Preparation before exposing oil and gas well pipelines According to geological data, when pushing the mining face to 50m from the oil and gas well, each shift needs to strengthen the observation of the water dripping on the coal wall and roof near the oil and gas well, and report any abnormal situation in time.

[0046] Carry out maintenance work on hydraulic supports in areas affected by oil and gas wells to ensure that the supports do not have self-unloading, fluid leakage, or other phenomena, and that the initial support force of all supports must meet the specified requirements.

[0047] Before the operation, personnel must evacuate the downwind working face, return air chute, and return air main tunnel. A cordon must be set up 30m before and after the construction site. Personnel not related to the construction are strictly prohibited from entering the cordon. Operating personnel must not stand directly below the hole opening, and standing on the downwind side is strictly prohibited. At the same time, check that there are no explosion failures in the electrical equipment on the working face, and only proceed with the operation after confirming that it is intact.

[0048] Prepare the anchor net. If the roof is not intact, you must use the anchor net to support the roof and make up the initial support force to prevent the roof from leaking during the cutting process. Before cutting, check that the equipment is intact and there is no water leakage. Only start the operation after confirming that everything is correct.

[0049] Step 2: Oil and gas drilling exploration and disclosure during the production process According to the location of oil and gas drilling, when the working face is 50m away, mark the oil and gas well drilling hole and the starting exploration line at the corresponding position of the rubber transport and return air chute.

[0050] After mining to the starting exploration line, mark the drilling position of the oil and gas well on the corresponding coal wall of the working face. When the remaining exposure distance of the working face is 5m, start to use a handheld pneumatic drill to find out the specific location of the oil and gas well pipeline, and construct exploration holes from the working face to the mining direction. At the same time, reduce the mining cycle progress of the working face to 0.5m. When the remaining exposure distance of the working face is 0.5m or less, forward mining is strictly prohibited.

[0051] According to the on-site determination of the location of the oil and gas well pipeline, make markings and mark the contour lines on both sides of the pipeline (the contour line is 0.3m-0.5m away from the center line of the pipeline). Use a coal mining machine to break and transport the coal walls on both sides of the pipeline contour line, and use a pneumatic pick to break the coal body around the oil and gas well pipeline manually.

[0052] Step 3: Transportation of underground water jet cutting machine Before transporting the water jet cutting machine into the well, arrange for someone to check its integrity. Use a forklift to smoothly lift the water jet cutting machine into the compartment of the explosion-proof engineering vehicle and secure it securely; before starting the explosion-proof material truck, the driver of the explosion-proof material truck must wait until all personnel have evacuated to a range of 5m before starting the explosion-proof material truck.

[0053] When loading and unloading the water jet cutting machine, personnel must wait until the explosion-proof material truck stops steadily and the driver gives a signal that they can approach the vehicle for operation before they can approach the vehicle for operation; when the explosion-proof material truck is operating in the lane, the "no pedestrians while vehicles are driving and no vehicles while pedestrians are driving" rule must be strictly implemented.

[0054] When an explosion-proof material truck breaks down, the driver should stop the car immediately, pull the parking brake, turn on the double flash warning lights, prevent the vehicle from being blocked, and place a reflective triangular warning sign 30-60m behind the vehicle, and report to the mine dispatch room in a timely manner.

[0055] Step 4: Preparation before installing the water jet cutting machine Place the water jet cutting machine in a relatively flat area in the machine path and place it securely. Ensure that the water inlet temperature is between 0℃ and 50℃, the water inlet flow rate is less than or equal to 22 liters per minute, and the cable should be 660V 10 square millimeter cable. The diameter of the cable entering the wiring cavity should match the aperture of the sealing ring. At the same time, prepare the matching high and low pressure hoses, auxiliary cutters and water jet devices.

[0056] Step 5: Installation of underground water jet cutting machine Open the top cover of the water jet cutting machine, insert the cable through the hole on the left side panel and connect it to the motor.

[0057] Connect the water pipe from the adjacent hydraulic support, select a DN10 to DN25 transformer with a DN25 male connector, connect it to the water cutting machine, and ensure that the water inlet pressure and flow are within the specified range; connect the external water source to the low-pressure hose with a connector; remove the dust-proof plug at the water inlet valve, insert the low-pressure hose connector, and insert the buckle to connect the low-pressure hose connector to the quick pull rod at the water inlet valve of the equipment.

[0058] To connect the high-pressure hose, insert the high-pressure quick connector at one end of the high-pressure hose into the high-pressure quick connector of the equipment and tighten it (if it gets stuck, gently vibrate the high-pressure quick connector); connect the high-pressure quick connector at the other end of the high-pressure hose to the high-pressure quick connector at the water jet device.

[0059] To load the abrasive, rotate the upper valve body of the upper cover of the mortar mixing device (clockwise to tighten, counterclockwise to loosen), and place the funnel on the tank mouth for filling; clean the tank mouth, tighten the upper valve body and the pressure relief valve. The tank mouth surface and the sealing ring groove should be rinsed clean to prevent leakage of the working medium and affect the service life of the O-type rubber sealing ring; at the same time, ensure that no debris enters the system to prevent the water spray pipe head of the water knife device from being blocked.

[0060] Step 6: Downhole water jet cutting machine test After transporting the water jet cutting machine to the designated location by a conveyor, confirm that all parts of the water jet cutting machine are complete and not missing or damaged. Check whether the safety equipment is intact and working properly. Ensure that the power supply is stable, the contact is good, and the power cables are intact. Check that the spray water pipe at the hydraulic support is supplying water normally and the water pressure meets the minimum pressure of the water jet cutting machine. Connect the power supply required by the equipment, 660V power supply. Connect the water source correctly to ensure there is no leakage.

[0061] Conduct no-load test run: First, confirm that the "high pressure", "emergency stop" and other buttons are functioning normally and effectively, then run the water pump to check whether the pressure gauge on the water pump can reach the minimum pressure required by the equipment, and finally run the pump motor for at least 5 minutes. Check whether there are any leaks in the system.

[0062] Conduct a high-pressure water test run: First, remove the sprinkler head at the cutting end. Adjust the overflow valve to reduce the system pressure to prevent a sudden increase in pressure from damaging the sealing device. Then run the low-pressure water pump until water flows out of the sprinkler head, and then stop the water pump. Start the high-pressure button to make water flow out of the sprinkler head for a while. Install the sprinkler head, slowly adjust the overflow valve to increase the system pressure, and check the sprinkler head and joints for leaks after each increase. During the test run, observe the pressure gauge, gradually increase the system pressure, and check the sprinkler head and joints for leaks several times. If leaks or abnormalities are found, stop the test run immediately, troubleshoot and solve the problem.

[0063] Step 7: Downhole oil and gas pipeline cutting Before high-pressure water cutting, use reflective tape to secure the pump body of the hydraulic cutting machine. Two operators are required for cutting, one for cutting and the other for observing the operation of the main machine. Open the water inlet valve and start the machine only after water flows out of the water jet head. When the mortar jet is basically formed, start cutting. Other personnel are strictly prohibited from entering during operation. After cutting, seal the upper and lower ends to prevent leakage of the chute or gas. Fix the pipeline outside the conveyor chute to transport it out of the working surface.

[0064] Step 8: Recycling of underground water jet cutting machine When retrieving the water jet cutting machine, the chain hoisting is also used, and a trial hoisting operation is carried out. After confirmation, it can be officially hoisted and placed on the vehicle. During the hoisting operation, it is strictly forbidden for personnel to work or walk within the swing range of the water jet cutting machine, and it is also strictly forbidden to work under the water jet cutting machine.

[0065] It should be noted that the approximate location of the oil and gas well pipeline is determined based on geological exploration data. When the remaining exposure distance of the working face is 5m, the specific location of the oil and gas well pipeline is found from the working face to the construction position of the push mining direction. The coal wall on both sides of the pipeline outline is broken and transported by a coal mining machine. The coal body around the oil and gas well pipeline is broken manually by a pneumatic pick. The following safety measures must be observed during push mining: When using a coal mining machine to expose oil and gas well pipelines, coal must be cut strictly according to the marked contour lines, and it is strictly forbidden to directly cut the pipeline beyond the marked lines.

[0066] Use two handheld pneumatic drills for exploration. Pay attention to your position during exploration. When constructing the conveyor runway, personnel must lock the conveyor, knock on the sides and check the top. If the top is not intact, support it before proceeding. Personnel must face the sides and hold the drill well during operation to prevent damage from being caused by the drill.

[0067] Attention must be paid to the top wall, drilling rig and drill rod at all times. If any unsafe hidden danger is found, drilling must be stopped and dealt with in time. Normal construction can only be continued after the hidden danger is eliminated.

[0068] When the remaining exposure distance of the working face is 2.5m, the coal mining machine slows down when entering the detection area (20m on each side) to cut coal. When entering the 5m range, it cuts coal at a speed of 2m / min. The coal mining machine driver observes the coal wall conditions at any time.

[0069] When using a manual pneumatic pick to break the coal around the pipeline, work from top to bottom and back to back. It is strictly forbidden to work from both sides facing each other. No one is allowed to be within 10m before and after the lower part of the work site. Stop immediately when encountering a pipeline.

[0070] The vehicle transporting the water jet cutter enters the return air trough and is transported to the advance bracket. It is strictly forbidden to unload the vehicle by rolling down from the carriage. The water jet cutter is hoisted and unloaded from the carriage with a hand chain hoist: a special lifting anchor rod is used as a device to hang the hand chain hoist. A 40T chain is inserted into the exposed anchor cable to install the tray and lock. The two ends of the 40T chain are connected with horseshoe rings. The hand chain hoist is hung in the 40T chain. The vehicle is reversed so that the water jet cutter is under the hand chain hoist. After the vehicle is turned off, the horse trough of the carriage is opened, and the hand chain hoist hook is hung on the water jet cutter. The small chain is pulled to make the water jet cutter 100mm higher than the carriage floor. Instruct the driver to drive forward slowly for 10m, and the operator pulls the hand chain hoist small chain to place the water jet cutter on the floor.

[0071] Before high-pressure water cutting, when entering the conveyor, the power is turned off, locked and locked, knocking and asking the top, only the water pump and lighting power supply are retained, and the water cutting machine must be fixed firmly in advance with special pipe clamps, hand hoists and 40T chain rings. When fixing the pipeline, the 40T chain ring is connected with horseshoe rings. The horseshoe ring must be locked with high-strength screws. The high-strength screws are exposed to the nut for at least 2cm. It is strictly forbidden to use open rings.

[0072] During high-pressure water cutting, operators must stay away from the direction of high-pressure mortar water jet spray and reflection to prevent injury. When cutting, judge the cutting condition according to the reflection of the jet (high jet reflection means that the workpiece is not cut through; the jet oblique downward state is the best cutting state; if the jet is vertically downward, it means that the cutting speed can be increased).

[0073] During high-pressure water cutting, hang the portable four-in-one gas detector 5m away from the downwind side of the work point. When the cut on the pipeline is more than 1cm, stop cutting immediately. The rescue team will check the gas and water conditions. If there are any abnormalities, take on-site treatment measures.

[0074] During high-pressure water cutting, the ground monitoring and control console closely monitors the sensor alarm at the tail safety exit of the working face sensor or the return air chute. When the gas concentration exceeds 1.0%, the ground monitoring and control console notifies the underground through broadcasting to immediately stop construction, cut off power, evacuate personnel, and promptly report to the ventilation technology management room and production scheduling management room to take measures to deal with it; if the gas concentration exceeds 1%, immediately stop construction, cut off power, evacuate personnel, and take measures to deal with it.

[0075] The order of cutting oil and gas wells is to cut the bottom first and then the top. Tie the anti-fall rope to the hydraulic support to prevent the well section from falling and injuring people after the upper and lower parts of the oil and gas well are completely cut off. Use a water jet cutter to cut the oil and gas well pipeline, cut 20cm grooves in the upper and lower parts of the oil and gas well, fix the upper end with a 40T chain and a hand winch, cut the bottom of the oil and gas pipe first, and cut the upper pipeline after the gas and water are processed. The oil and gas well pipeline must be kept firm during the whole process to prevent harm to the operating personnel (the personnel are working at a distance of 1m). The warning must be set 30m away. Except for the operating personnel, other personnel are strictly prohibited from entering during the operation. After cutting, the upper and lower ends are blocked to prevent pipe slip or gas leakage.

[0076] After the pipeline is cut, the bottom plate is sealed and covered, and the top plate is welded tightly with a matching iron plate (the diameter of the iron plate disc is slightly larger than the outer diameter of the outer casing of the oil and gas well to ensure that it can cover the cutting surface of the oil and gas well) to prevent the residual oil and gas in the well from escaping and leaking after the top plate collapses, causing toxic and harmful gases in the goaf and working face to exceed the standard, and even the goaf spontaneously ignites and fixes the pipeline in the conveyor chute to be transported out of the working face.

[0077] From the above, it can be seen that through the water jet device and water jet cutting machine for cutting oil and gas wells in the coal, oil and gas superimposed area provided by the present invention, the coal mining working face can be smoothly pushed for mining, and the upper coal seam in the coal, oil and gas superimposed area can be smoothly mined, forming a pattern of comprehensive utilization, safe and reliable coordinated mining of coal mines and deep oil and natural gas.

[0078] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0079] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0080] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas, characterized in that: include: The clamp component adjusts its inner diameter according to the outer diameter of the oil and gas well, so that the clamp component can be tightly clamped on the outer circumferential surface of the oil and gas well; The connecting rod component is composed of a connecting portion and a rotating portion capable of circumferentially rotating on the connecting portion; wherein the connecting portion is fixedly connected to the clamp component; A water jet head is inserted into the rotating part, and a high-pressure water jet ejected from the water jet head can vertically hit the outer circumference of the oil and gas well, so that the oil and gas well can be cut horizontally; The water pipe is connected, and the water spray pipe head is connected to the high-pressure water outlet device through the water pipe. The operator drives the water spray pipe head to swing together by swinging the water pipe, thereby forming a spray area with a fan-shaped cross-section.

2. A water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas according to claim 1, characterized in that: The clamp component comprises: A flexible connector capable of being wound around the outer circumference of the oil and gas well; A rigid connector, whose side elevation facing the oil and gas well is an arc-shaped surface, used to fit on the outer circumferential surface of the oil and gas well, and one lateral end of the rigid connector is hinged to a free end of the flexible connector, and the other lateral end of the rigid connector is set as a clamping portion; The locking component is connected between the other free end of the flexible connector and the clamping portion, and is used to adjust the inner diameter of the ring formed by the flexible connector and the rigid connector, and to lock the flexible connector and the rigid connector on the outer circumferential surface of the oil and gas well.

3. A water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas according to claim 2, characterized in that: The locking component comprises: A threaded column, one end of which is hinged to the flexible connector, and a middle area of ​​which is clamped in the clamping portion, with a clearance fit between the two; The threaded sleeve is composed of a hollow internally threaded casing and a handle, and has an overall T-shaped structure. The internally threaded casing is screwed into the threaded column. When the handle is rotated, the internally threaded casing is driven to rotate together. Under the action of the internal and external threads, the internally threaded casing converts the circumferential rotational motion into axial linear motion to push the clamping part toward the oil and gas well, thereby tightening the flexible connector and the rigid connector on the outer circumferential surface of the oil and gas well.

4. A water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas according to claim 2, characterized in that: The rigid connector is composed of a right-angled triangular plate whose hypotenuse is set as an inward concave arc edge and a U-shaped clamping plate located at the right angle of the right-angled triangular plate, which are integrally cast or welded, and the U-shaped clamping plate is used as the clamping part; A through hole for cooperating with the use is provided in the central area of ​​the right-angled triangular plate, and a reaming hole for inserting a pin shaft for hinged connection with the flexible connecting piece is provided at an acute angle of the right-angled triangular plate.

5. The water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas according to claim 1, characterized in that: The connecting rod component comprises: A vertically arranged connecting rod, the top of which is connected to the clamp component via a first fastener; A horizontally arranged support rod, one end of which is fixed to the bottom of the connecting rod; A vertically arranged rotating rod is located below the support rod, the top of the rotating rod is connected to the middle area of ​​the support rod through a second fastener, and the rotating rod can rotate circumferentially around its center point; a radial through hole is provided in the middle area of ​​the outer circumferential surface of the rotating rod, the water spray pipe head is inserted into the radial through hole, and the water spray pipe head is fixed by a third fastener.

6. A water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas according to claim 5, characterized in that: The top of the connecting rod is configured as a stepped head with external threads, and the stepped head is inserted into the through hole of the clamp component from bottom to top; The first fastener is a nut, which is screwed onto the step head to press the shoulder at the step head against the clamp component, thereby fixing the connecting rod and the clamp component together.

7. The water jet device for cutting oil and gas wells in coal, oil and gas overlapping areas according to claim 5, characterized in that: A vertically arranged through hole is provided in the middle area of ​​the support rod, and an axial internal threaded blind hole coaxially arranged with the through hole is provided in the central area of ​​the axial top surface of the rotating rod; The second fastener is a screw, whose threaded rod is inserted into the through hole from top to bottom and then tightened in the axial internal threaded blind hole; the threaded rod of the screw and the through hole are clearance-matched, and the length of the threaded rod of the screw is greater than the combined depth of the through hole and the axial internal threaded blind hole, so that the rotating rod and the screw can move axially on the support rod, thereby realizing the circumferential rotation function of the rotating rod; An axial internal threaded mounting hole communicating with the radial through hole is provided in the central area of ​​the axial bottom surface of the rotating rod; The third fastener is a screw, and its threaded rod is screwed into the axial internal threaded mounting hole and then tightened on the water sprinkler head, thereby fixing the water sprinkler head with the distance between the end of the water sprinkler head and the outer circumferential surface of the oil and gas well adjusted on the rotating rod.

8. A cutting method for cutting an oil and gas well in a coal, oil and gas overlapping area using a water jet device according to any one of claims 1 to 7, characterized in that: Determine the pre-cutting position on the outer circumference of the oil and gas well and mark the cutting position; Tighten the clamp assembly onto the oil and gas well above the cutting position mark; After adjusting the position of the connecting rod component, fix it on the clamp component; After adjusting the distance between the water spray pipe head and the outer circumferential surface of the oil and gas well, fix it on the connecting rod component; Two operators are required for cutting, one is responsible for operating the high-voltage equipment and observing its operating status, and the other is responsible for cutting; Open the water inlet valve, and start the high-pressure water outlet device after water flows out of the water spray pipe head. When the mortar jet is basically formed, start cutting. During the cutting process, the operator swings the connecting water pipe to form a fan-shaped jet from the straight jet. After cutting is completed, the incision of the oil and gas well is sealed to prevent gas leakage.

9. A water jet cutting machine, comprising a high pressure water outlet device, characterized in that: It also includes the water jet device for cutting oil and gas wells in coal, oil and gas superposition areas as described in any one of claims 1 to 7.

10. A construction method based on the water jet cutting machine according to claim 9, characterized in that: It is mainly divided into the following steps: Step 1: Preparation work before uncovering the oil and gas well casing; Step 2: Exploration and exposure of oil and gas wells during the mining process at the coal mine working face; Step 3: Transportation of underground water jet cutting machine; Step 4: Preparation before installing the water jet cutting machine; Step 5: Installation of underground water jet cutting machine; Step 6: Downhole water jet cutting machine test; Step 7: Cutting of underground oil and gas pipelines; Step 8: Recovery of underground water jet cutting machine.

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