Pipe pressure containment tilt opening device for oil and gas transport and method of use

Abstract

The present application relates to the technical field of petroleum pipeline maintenance tools, and is a pipeline inclined hole drilling device for oil and gas transmission under pressure and a use method thereof. The pipeline inclined hole drilling device for oil and gas transmission under pressure comprises a guide pipe, a drilling cutter, a drilling driving mechanism and a control unit. The present application has a reasonable and compact structure and is convenient to use. By means of the guide pipe which is fixed in an inclined manner near a pipeline fault point, the drilling cutter which is installed in the guide pipe, the drilling driving system, the cooling liquid circulating system and the control unit, a relatively larger elliptical inclined hole can be drilled on the pipeline wall, the work tools used in the repair operation can be conveniently lowered from the inclined hole, the operation space of the work tools is larger, the repairable area is larger, the operation is easier to control, the repair operation time is saved, the labor intensity and the safety risk level of the repair personnel are effectively reduced, and the work efficiency of the maintenance and repair operation is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil pipeline repair tools, and is a pipeline inclined hole drilling device for oil and gas transmission under pressure and a use method. BACKGROUND

[0002] During oil and gas transmission, it is often necessary to repair or clean the inside of the ground transmission pipeline under pressure. In order to complete this task, the commonly used method is to first drill a hole in the pipeline wall, and then send the repair work tools into the pipeline cavity from the outside. At present, the commonly used method in the industry is the orthogonal cutting method (the drilling channel is perpendicular to the transmission pipeline), that is, the axis of the drilling machine is kept perpendicular to the outer wall of the pipeline, and then the drilling machine is used to drill into the pipeline from the outside to the inside along the radial direction of the pipeline.

[0003] A kind of oil and gas gathering and transportation pipeline under pressure hole drilling device is disclosed in Chinese patent document with publication number CN205816874U, comprising a shell and a drilling mechanism, the shell comprises upper shell and lower shell, both are sealedly connected by flange, the drilling mechanism is installed in upper shell, drilling mechanism includes standard drill chuck, rotating sleeve and guide rod, standard drill chuck and rotating sleeve extend from the round hole in the bottom of upper shell, guide rod extends from the round hole in the top of upper shell, guide rod passes through rotating sleeve from the upper end of rotating sleeve and is connected with standard drill chuck, thrust bearing is arranged between standard drill chuck and rotating sleeve, pedal is arranged on both sides of rotating sleeve, slide is arranged on both sides of upper shell, pedal passes through slide from the outside and is connected with rotating sleeve by screw thread, rotating hand wheel is connected with the top of guide rod by screw thread, adjusting washer is arranged between rotating hand wheel and upper shell, the side of lower shell is provided with flow guide hole, the bottom of lower shell is circular arc structure which is suitable for the surface of pipeline, the edge of circular arc structure is provided with mounting hole and asbestos pad, and the asbestos pad is bonded on the lower shell. It is manually designed, so the structure is simple, convenient to carry and does not need external power.

[0004] Therefore, the existing orthogonal cutting hole drilling has the following disadvantages in actual use: a plurality of detection methods and instruments are needed to accurately locate the fault point; the drilled holes are all circular holes with relatively small diameters; due to the limitation of the radial size of the pipeline and the 90° angle between the drilling channel and the transmission pipeline, the repair work tools are very short, small and compact, the space for use is extremely limited, and the repairable area is very narrow; remote uninterrupted operation cannot be performed; drilling and hole drilling mainly rely on manual operation, which is labor-intensive, high in safety risk and low in work efficiency. SUMMARY

[0005] The application provides a pipeline inclined hole drilling device for oil and gas transportation under pressure and a use method, which overcomes the defects of the prior art, effectively solves the problems of the prior art, such as the need for multiple detection methods and multiple detection instruments to accurately position the fault point, the drilled hole is a circular hole, the hole diameter is relatively small, the repair tool is short, small and compact, the space for operation is extremely limited, the repairable area is very narrow, remote uninterrupted operation cannot be performed, drilling and hole drilling mainly rely on manual operation, the labor intensity is high, the safety risk is high, and the work efficiency is low.

[0006] One of the technical solutions of the application is achieved by the following measures: a pipeline inclined hole drilling device for oil and gas transportation under pressure, comprising a guide pipe, a drilling cutter, a drilling driving mechanism and a control unit, the right end of the guide pipe is inclined in a left lower right upper shape, the left end of the guide pipe is detachably installed with the drilling driving mechanism, the drilling driving mechanism comprises a U-shaped support seat, a guide seat, a rotary motor, a sleeve, a sleeve rod, a first mounting seat, a second mounting seat, a linear actuator and a motor fixing seat, the upper inner side of the U-shaped support seat is fixedly installed with the outer side of the left end of the guide pipe through a threaded fastener, the guide seat is detachably installed on the left side of the U-shaped support seat and abuts against the left end of the guide pipe, a stepped hole that is left large right small is arranged on the guide seat corresponding to the middle position of the left end of the guide pipe, a rotary motor is arranged on the left inner side of the left part of the stepped hole and located to the left of the guide seat, the drilling cutter is sequentially arranged through the inner side of the guide pipe and the inner side of the right end of the stepped hole and is in transmission connection with the output end of the rotary motor, the sleeve is fixedly installed at the lower end of the U-shaped support seat, the sleeve rod is slidably installed in the sleeve and located to the left of the sleeve, the first mounting seat is fixedly installed at the lower left end of the sleeve rod, the second mounting seat is fixedly installed at the right lower end of the sleeve corresponding to the position of the first mounting seat, the linear actuator is arranged between the second mounting seat and the first mounting seat and can extend to the left, the motor fixing seat is fixedly installed at the left upper part of the sleeve rod and detachably installed with the left part of the rotary motor; the lower left side of the guide pipe is provided with a cooling liquid inlet, the lower right side of the guide pipe is provided with a cooling liquid outlet, and the cooling liquid circulation system for cooling the drilling cutter is arranged between the cooling liquid inlet and the cooling liquid outlet; the control unit is connected with the drilling driving mechanism and the cooling liquid circulation system.

[0007] The following is a further optimization or / and improvement of the above-mentioned technical solutions of the application:

[0008] The above-mentioned guide pipe can comprise a left guide pipe, a gate valve and a right guide pipe, the right end of the left guide pipe is detachably installed with the left end of the gate valve through a connecting flange, and the right end of the gate valve is detachably installed with the left end of the right guide pipe through a connecting flange.

[0009] The end cap is screwed to the outer side of the left end of the guide pipe after the U-shaped support base and the drilling tool are removed.

[0010] The cooling liquid circulation system can include a pressure detection device, a cooling liquid inlet pipe, a cooling liquid circulation pump, a cooling liquid tank and a cooling liquid outlet pipe. The pressure detection port is provided on the upper side of the right part of the guide pipe, and the pressure detection device is screwed into the pressure detection port. The cooling liquid tank is connected to the cooling liquid inlet port through the cooling liquid inlet pipe. The cooling liquid circulation pump is provided on the cooling liquid inlet pipe. The outlet port is connected to the cooling liquid tank through the cooling liquid outlet pipe. The pressure detection device and the cooling liquid circulation pump are connected to the control unit respectively.

[0011] The combination sealing element can also be included. The sealing ring groove is provided on the inner side of the left end of the guide pipe, and the combination sealing element capable of forming dynamic sealing with the outer side of the left part of the drilling tool is provided in the sealing ring groove.

[0012] The drilling driving mechanism can also include a hydraulic driving system. The rotary motor is a hydraulic motor, and the linear actuator is a hydraulic cylinder. The hydraulic motor and the hydraulic cylinder are connected to the hydraulic driving system respectively. The hydraulic driving system includes an oil tank, an oil pump, a motor control valve and a cylinder control valve. The oil tank is connected to the oil pump. The oil pump is connected to the motor control valve and the cylinder control valve respectively. The motor control valve is connected to the hydraulic motor. The hydraulic motor is connected to the oil tank. The cylinder control valve is connected to the hydraulic cylinder and the oil tank respectively. The motor control valve and the cylinder control valve are electrically connected to the control unit respectively.

[0013] The drilling tool can include a tool shank, a coupling, a drilling tool head and a support ring. The left end of the tool shank is connected to the output end of the rotary motor through the coupling. The drilling tool head is detachably installed at the right end of the tool shank and extends out of the guide pipe. The support ring is fixedly installed on the outer side of the tool shank at intervals. The support ring is provided with apertures for the flow of cooling liquid.

[0014] The guide pipe can also include a support rod and a clamp. The support rod is provided on the lower side of the left part of the guide pipe and is inclined from left to right. The clamp is fixedly installed at the lower end of the support rod.

[0015] The second technical solution of the present application is realized by the following measures: a method for using a pipeline pressure inclined hole drilling device for oil and gas transportation, which is performed according to the following method: first, a suitable position is selected near the pipeline fault point, and the pipeline surface at the position is cleaned, then the right end of the guide pipe is fixedly installed with the cleaned pipeline surface, and the cooling liquid circulation system is connected and installed on the guide pipe; second, the drilling, drilling driving mechanism and hydraulic driving system are assembled together, and the piston rod of the hydraulic cylinder is controlled to extend to the left by a distance through the control unit, so that the hydraulic motor and the guide seat maintain a certain distance, then the drilling cutter is put into the guide pipe by opening the gate valve, and the combined sealing element is installed to the left outer side of the cutter rod, and then the drilling driving mechanism is installed to the outer side of the left end of the guide pipe; third, the cooling liquid circulation pump is opened to pump the cooling liquid into the guide pipe, and when the cooling liquid fills the guide pipe, the cooling liquid circulation pump is closed, and the sealing performance between the left guide pipe, the gate valve and the right guide pipe, and between the right guide pipe and the pipeline surface is tested, and if the sealing performance is qualified, the next process is performed; fourth, the oil pump is opened to start the rotation of the hydraulic motor, then the cooling liquid circulation pump is opened, and then the piston rod of the hydraulic cylinder is controlled to retract to the right, so that the drilling cutter feeds to the right along the guide pipe in the axial direction, and when the right end of the drilling cutter contacts the pipeline surface, the drilling of the pipeline wall is automatically started, and when the piston rod of the hydraulic cylinder retracts to the right to the minimum stroke, the pipeline wall is drilled, and the inclined hole drilling process is completed; fifth, the cooling liquid circulation pump is closed, the piston rod of the hydraulic cylinder is controlled to extend to the left so that the drilling cutter leaves the inclined hole, the hydraulic motor is closed, the drilling driving mechanism is disassembled from the guide pipe, the drilling driving mechanism is moved to the left to pull out the drilling cutter from the left end of the guide pipe, the drilling cutter is taken out, the gate valve is closed in time during the process of taking out the drilling cutter, the cooling liquid inlet pipe and the cooling liquid outlet pipe are disassembled, the cooling liquid inlet and the cooling liquid outlet are closed by the sealing plug, and finally the left end of the guide pipe is closed by the end cover and the sealing gasket.

[0016] The present application has reasonable and compact structure, and is convenient to use, and the inclined guide pipe fixed near the position of the pipeline fault point, the drilling cutter installed in the guide pipe, the drilling driving system, the cooling liquid circulation system and the control unit can realize the automatic control of the drilling cutter to drill the relatively larger elliptical inclined hole on the pipeline wall, the tools used for the repair operation from the inclined hole are easier and more convenient to use, the operation space left for the tools is larger, the repairable area is larger, and the operation is easier to control; during the drilling, various detection means or detection instruments are not needed to accurately position the fault point, the fixed position of the guide pipe only needs to be selected near the fault point, and the subsequent detection tool from the inclined hole is easier to detect the fault point from the inside of the pipeline, which can effectively save the maintenance operation time and reduce the labor intensity and safety risk level of the repair personnel, and greatly improves the work efficiency of the maintenance and repair operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] ATTACHMENT Figure 1It is a main view partial section structure schematic view of embodiment 1 of the present application.

[0018] Attached Figure 2 It is a working state partial section structure schematic view of embodiment 9 of the present application.

[0019] Attached Figure 3 It is a use state partial section structure schematic view of embodiment 9 of the present application.

[0020] Attached Figure 4 It is a hydraulic principle schematic view of the hydraulic drive system in embodiment 6 of the present application.

[0021] The codes in the drawings are as follows: 1 is a U-shaped support seat, 2 is a guide seat, 3 is a rotary motor, 4 is a sleeve, 5 is a sleeve rod, 6 is a first mounting seat, 7 is a second mounting seat, 8 is a linear actuator, 9 is a motor fixing seat, 10 is a threaded fastener, 11 is a stepped hole, 12 is a cooling liquid inlet, 13 is a cooling liquid outlet, 14 is a pipeline, 15 is a left guide pipe, 16 is a gate valve, 17 is a right guide pipe, 18 is an end cover, 19 is a pressure detection device, 20 is a combined sealing element, 21 is an oil tank, 22 is an oil pump, 23 is a motor control valve, 24 is a cylinder control valve, 25 is a cutter bar, 26 is a coupling, 27 is a drilling cutter head, 28 is a support ring, 29 is a support rod, 30 is a clamp, and 31 is an inclined hole. DETAILED DESCRIPTION

[0022] The present application is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the present application and the actual situation.

[0023] In the present application, in order to facilitate the description, the relative position relationship of each component is described according to the layout mode of the drawings attached to the specification. Figure 1 For example, the position relationship of front, back, top, bottom, left, right, etc. is determined according to the layout direction of the drawings attached to the specification.

[0024] The present application will be further described below in combination with embodiments and drawings:

[0025] Embodiment 1: as shown in the attached Figure 1 , 2 ​, 3, 4, the pipeline for oil and gas transmission is provided with a guide pipe, a drilling cutter, a drilling driving mechanism and a control unit, the right end of the guide pipe is inclined in a left lower right upper shape, the left end of the guide pipe is detachably provided with the drilling driving mechanism, the drilling driving mechanism comprises a U-shaped support seat 1, a guide seat 2, a rotary motor 3, a sleeve pipe 4, a sleeve rod 5, a first mounting seat 6, a second mounting seat 7, a linear actuator 8 and a motor fixing seat 9, the inner side of the upper part of the U-shaped support seat 1 is fixedly installed with the outer side of the left end of the guide pipe through a threaded fastener 10, the left side of the U-shaped support seat 1 is detachably provided with the guide seat 2 which is in abutment with the left end of the guide pipe, the guide seat 2 is provided with a stepped hole 11 which is through left and right and in a left large right small shape, the left part of the stepped hole 11 is provided with the rotary motor 3 which is located to the left of the guide seat 2, the drilling cutter is sequentially through the inner side of the guide pipe and the inner side of the right end of the stepped hole 11 from right to left and is in transmission connection with the output end of the rotary motor 3, the lower end of the U-shaped support seat 1 is fixedly installed with the sleeve pipe 4, the sleeve pipe 4 is slidably installed with the sleeve rod 5 which is located to the left of the sleeve pipe 4, the left end of the sleeve rod 5 is fixedly installed with the first mounting seat 6, the right end of the sleeve pipe 4 is fixedly installed with the second mounting seat 7 which is corresponding to the position of the first mounting seat 6, the second mounting seat 7 and the first mounting seat 6 are provided with the linear actuator 8 which can be extended to the left, the left part of the upper side of the sleeve rod 5 is fixedly installed with the motor fixing seat 9 which is detachably installed with the left part of the rotary motor 3 on the right upper end, the left lower side of the guide pipe is provided with a cooling liquid inlet 12, the right lower side of the guide pipe is provided with a cooling liquid outlet 13, the cooling liquid inlet 12 and the cooling liquid outlet 13 are provided with a cooling liquid circulation system which can cool the drilling cutter, the control unit is connected with the drilling driving mechanism and the cooling liquid circulation system.

[0026] By setting in this way, can not be accurate positioning fault point position, only need to select the appropriate position in the pipeline 14 fault point near the right end of the guide tube pipe 14 surface fixed installation together (in this embodiment using the welding), can make the guide tube tilt fixed on the pipeline 14, and then through the drill cutting tool, drill driving device and control unit can realize automatic control drill cutting tool along the guide tube axial feed will drill through the pipe wall 14, drill out a oval or egg shaped oblique hole 31, and the same diameter drill oblique hole diameter compared with the circular hole is larger, more convenient for subsequent detection, cleaning or maintenance tool down into the pipeline 14 in the repair or cleaning or detection work, in addition, when the fault point near the pipeline 14 on the installation of other equipment or pipeline, oblique drilling can effectively avoid drill cutting tool and drill driving device and related equipment interference collision, reduce the drilling difficulty, improve the maintenance efficiency; Cooling liquid circulation system for drill cutting tool cooling in the process of drilling, prevent drill cutting tool and pipe wall friction spark or temperature is too high influence drilling performance, also can avoid the security risk, cooling liquid can be cooling water or existing known technology in machining using cutting fluid; The sleeve rod 5 and sleeve 4 of sliding sleeve together with the linear actuator 8 can make drill cutting tool axial feed or retreat, rotary motor 3 can provide cutting force for drill cutting tool. According to the demand, the right end of the guide tube can be set according to the pipe diameter and fault point position of the pipeline 14, and the right end surface shape can also match the shape of the outer wall of the pipeline 14 at the fault point position. In this embodiment, the inclination angle between the guide tube and the pipeline 14 is 25°. The U-shaped support seat 1 can be a support plate with a U-shaped notch at the upper end, or it can be realized based on the existing known technology of U-shaped buckle or U-shaped bolt. The threaded fastener 10 is used to shrink the opening size of the U-shaped notch to reliably fix the U-shaped support seat 1 on the outside of the left end of the guide tube. The above detachable installation can be realized by the existing known technology of threaded fastener or threaded connection. The rotary motor 3 can be a control motor or a gas motor or a hydraulic motor in the existing known technology. The linear actuator 8 can be an electric push rod or a gas cylinder or a hydraulic rod or a rotary motor gear rack mechanism in the existing known technology. The control unit can be realized by a single chip microcomputer or a single board computer or a computer or a PLC or a DSP in the existing known technology.

[0027] This invention features a reasonable and compact structure, making it easy to use. It utilizes a guide tube fixed at an angle near the fault point in pipe 14, along with a drilling tool installed within the guide tube. This, combined with a drilling drive system, coolant circulation system, and control unit, enables remote automatic control to create a relatively larger elliptical inclined hole 31 in the pipe wall of pipe 14. This allows for easier and more convenient access to repair tools through the inclined hole 31, providing a larger working space and enabling the repair of a larger area. Furthermore, drilling eliminates the need for multiple detection methods or instruments to precisely locate the fault point; the guide tube only needs to be fixed near the fault point. Subsequent access to the detection tool through the inclined hole 31 makes it easier to detect the fault point from inside pipe 14. This effectively saves maintenance time, reduces the labor intensity and safety risks for repair personnel, and significantly improves the efficiency of maintenance and repair work.

[0028] The above-mentioned pressurized inclined orifice opening device for oil and gas transportation can be further optimized and / or improved according to actual needs:

[0029] Example 2: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the guide pipe includes a left guide pipe 15, a gate valve 16, and a right guide pipe 17. The right end of the left guide pipe 15 is detachably connected to the left end of the gate valve 16 via a connecting flange, and the right end of the gate valve 16 is detachably connected to the left end of the right guide pipe 17 via a connecting flange. With this configuration, timely closure of the gate valve 16 during the removal of the drilling tool effectively prevents the liquid in the pipe 14 from flowing out of the guide pipe.

[0030] Example 3: As shown in the attached document Figure 3 As shown, it also includes an end cap 18. After removing the U-shaped support 1 and the drilling tool, the end cap 18 is screwed onto the outer side of the left end of the guide tube. With this configuration, when the oblique hole 31 is not used, the end cap 18 and the sealing gasket can effectively prevent dust from entering the guide tube or liquid from seeping out of the guide tube and polluting the environment.

[0031] Example 4: As shown in the appendix Figure 1 , 2 As shown in Figure 3, the coolant circulation system includes a pressure detection device 19, a coolant inlet pipe, a coolant circulation pump, a coolant tank, and a coolant outlet pipe. A pressure detection port is provided on the upper right side of the guide pipe, and the pressure detection device 19 is screwed into the pressure detection port. The coolant tank and the coolant inlet 12 are connected by a coolant inlet pipe, and a coolant circulation pump is provided on the coolant inlet pipe. The outlet is connected to the coolant tank by a coolant outlet pipe. The pressure detection device 19 and the coolant circulation pump are respectively connected to the control unit.

[0032] Through such a setting, the pressure detection device 19 can monitor the pressure in the guide pipe at any time, and when the cooling liquid overheats and the pressure in the guide pipe is too large, the control unit can adjust the cooling liquid circulating pump to speed up the flow of the cooling liquid, better cooling the drill tool and the pipe 14 wall.

[0033] Embodiment 5: as shown in Figs. 4 and 5, the drill driving mechanism further comprises a combined sealing element 20, and a sealing ring groove is arranged on the inner side of the left end of the guide pipe, and the combined sealing element 20 capable of forming a dynamic seal with the outer side of the left part of the drill tool is arranged in the sealing ring groove. According to requirements, the sealing combination can be realized by a sealing gasket and a sealing ring assembly or a sealing packing stacked together through the existing known technology, so as to prevent the liquid in the guide pipe from flowing out of the guide pipe and polluting the environment. Figure 1 2 Embodiment 5: as shown in Figs. 4 and 5, the drill driving mechanism further comprises a combined sealing element 20, and a sealing ring groove is arranged on the inner side of the left end of the guide pipe, and the combined sealing element 20 capable of forming a dynamic seal with the outer side of the left part of the drill tool is arranged in the sealing ring groove. According to requirements, the sealing combination can be realized by a sealing gasket and a sealing ring assembly or a sealing packing stacked together through the existing known technology, so as to prevent the liquid in the guide pipe from flowing out of the guide pipe and polluting the environment.

[0034] Embodiment 6: as shown in Figs. 6 and 7, the drill driving mechanism further comprises a hydraulic driving system, the rotary motor 3 is a hydraulic motor, and the linear actuator 8 is a hydraulic cylinder, and the hydraulic motor and the hydraulic cylinder are respectively connected with the hydraulic driving system, the hydraulic driving system comprises an oil tank 21, an oil pump 22, a motor control valve 23 and a cylinder control valve 24, the oil tank 21 is connected with the oil pump 22, the oil pump 22 is respectively connected with the motor control valve 23 and the cylinder control valve 24, the motor control valve 23 is connected with the hydraulic motor, the hydraulic motor is connected with the oil tank 21, the cylinder control valve 24 is respectively connected with the hydraulic cylinder and the oil tank 21, and the motor control valve 23 and the cylinder control valve 24 are respectively electrically connected with the control unit. Figure 1 2 Through such a setting, the hydraulic motor and the hydraulic cylinder can avoid the safety hazards brought by electrical equipment, and the load of the hydraulic actuator is larger than that of the pneumatic actuator, which is more suitable for the device; according to requirements, the hydraulic driving system can also be realized by a pump truck provided with a hydraulic pump through the existing known technology, the motor control valve 23 in the embodiment can be realized by a two-position two-way valve, the cylinder control valve 24 can be realized by a three-position four-way valve, and the hydraulic cylinder can be a double-acting hydraulic cylinder, so that the reaction action is faster when the feed and retreat of the drill tool are controlled.

[0035] Embodiment 6: as shown in Figs. 6 and 7, the drill driving mechanism further comprises a hydraulic driving system, the rotary motor 3 is a hydraulic motor, and the linear actuator 8 is a hydraulic cylinder, and the hydraulic motor and the hydraulic cylinder are respectively connected with the hydraulic driving system, the hydraulic driving system comprises an oil tank 21, an oil pump 22, a motor control valve 23 and a cylinder control valve 24, the oil tank 21 is connected with the oil pump 22, the oil pump 22 is respectively connected with the motor control valve 23 and the cylinder control valve 24, the motor control valve 23 is connected with the hydraulic motor, the hydraulic motor is connected with the oil tank 21, the cylinder control valve 24 is respectively connected with the hydraulic cylinder and the oil tank 21, and the motor control valve 23 and the cylinder control valve 24 are respectively electrically connected with the control unit.

[0036] Embodiment 7: as shown in Figs. 8 and 9, the drill tool comprises a tool rod 25, a coupling 26, a drill bit 27 and a support ring 28, the left end of the tool rod 25 is connected together with the output end of the rotary motor 3 through the coupling 26, the drill bit 27 extending out of the guide pipe is detachably installed at the right end of the tool rod 25, the support ring 28 is fixedly installed on the outer side of the tool rod 25 at intervals, and the support ring 28 is provided with apertures for the flow of the cooling liquid. Figure 1 2 Through such a setting, the hydraulic motor and the hydraulic cylinder can avoid the safety hazards brought by electrical equipment, and the load of the hydraulic actuator is larger than that of the pneumatic actuator, which is more suitable for the device; according to requirements, the hydraulic driving system can also be realized by a pump truck provided with a hydraulic pump through the existing known technology, the motor control valve 23 in the embodiment can be realized by a two-position two-way valve, the cylinder control valve 24 can be realized by a three-position four-way valve, and the hydraulic cylinder can be a double-acting hydraulic cylinder, so that the reaction action is faster when the feed and retreat of the drill tool are controlled.

[0037] ​​​With this configuration, when the drill bit 27 is severely worn, only the drill bit 27 needs to be replaced, which can effectively reduce the cost of use. The support ring 28 is used to prevent the excessively long tool bar 25 from bending and deforming, which would affect the drilling effect. In this embodiment, the support ring 28 is implemented by a rolling bearing. The inner ring of the rolling bearing is fixed together with the tool bar 25 by an interference fit. When the tool bar 25 rotates, the outer ring of the bearing rotates, which can reduce the wear of the outer side of the support ring 28 on the inner wall of the guide tube and reliably support the tool bar 25, preventing the tool bar 25 from becoming unstable. The gap between the balls also facilitates the flow of coolant. In order to facilitate the monitoring of the pressure of the coolant before and after the support ring 28, a pressure detection device 19 can also be set on the upper left side of the guide tube.

[0038] Example 8: As attached Figure 1 , 2 As shown in Figure 3, it also includes a support rod 29 and a clamp 30. A support rod 29, oriented with an upper left and lower right inclination, is located on the lower left side of the guide tube. A clamp 30 is fixedly installed at the lower end of the support rod 29. During use, after the clamp 30 is installed on the pipe 14, the support rod 29, the pipe 14, and the guide tube can form a triangular support. When the drilling tool is working, this effectively prevents loosening or cracking at the connection between the right end of the guide tube and the pipe 14. Depending on the requirements, the clamp 30 is a split clamp used in existing known technologies for connecting valves or pipelines.

[0039] The method for using the pipeline pressure inclined hole drilling device for oil and gas transmission is performed in the following manner. First, a suitable position is selected near the fault point of the pipeline 14, and the surface of the pipeline 14 at the position is cleaned. Then, the right end of the guide pipe is fixedly installed with the cleaned surface of the pipeline 14, and a cooling liquid circulating system is connected and installed to the guide pipe. Second, the drilling, drilling driving mechanism and hydraulic driving system are assembled together, and the piston rod of the hydraulic cylinder is controlled to extend to the left by a certain distance through the control unit, so that a certain distance is maintained between the hydraulic motor and the guide seat 2. Then, the drilling cutter is put into the guide pipe by opening the gate valve 16, and the combined sealing member 20 is installed to the left outer side of the cutter rod 25. Then, the drilling driving mechanism is installed to the outer side of the left end of the guide pipe. Third, the cooling liquid circulating pump is opened to pump the cooling liquid into the guide pipe. When the cooling liquid fills the guide pipe, the cooling liquid circulating pump is closed. The sealing performance between the left guide pipe 15, the gate valve 16 and the right guide pipe 17, and between the right guide pipe 17 and the surface of the pipeline 14 is tested. If the sealing performance is qualified, the next process is performed. Fourth, the oil pump 22 is opened to start the rotation of the hydraulic motor. Then, the cooling liquid circulating pump is opened. Then, the piston rod of the hydraulic cylinder is controlled to retract to the right, so that the drilling cutter is fed to the right along the guide pipe in the axial direction. When the right end of the drilling cutter contacts the surface of the pipeline 14, the pipeline wall is automatically started to be drilled. When the piston rod of the hydraulic cylinder is retracted to the right to the minimum stroke, the pipeline 14 is drilled, and the inclined hole 31 is drilled and processed. Fifth, the cooling liquid circulating pump is closed. The piston rod of the hydraulic cylinder is controlled to extend to the left, so that the drilling cutter is separated from the inclined hole 31. The hydraulic motor is closed. The drilling driving mechanism is detached from the guide pipe. The drilling driving mechanism is moved to the left, so that the drilling cutter is pulled out from the left end of the guide pipe. The gate valve 16 is closed in time during the process of taking out the drilling cutter. Then, the cooling liquid inlet pipe and the cooling liquid outlet pipe are detached. The cooling liquid inlet 12 and the cooling liquid outlet 13 are closed by the sealing plug. Finally, the left end of the guide pipe is closed by the end cover 18 and the sealing gasket.

[0040] The above drilling method can effectively solve the problems of the orthogonal drilling method, such as accurate positioning of the fault point, small size of the drilled circular hole, small operation space of the maintenance worker and tools, limited drilling position, high labor intensity of manual drilling, long operation time and low operation efficiency. The inclined hole 31 has a larger diameter, and is at a certain angle with the pipeline 14. The inclined hole 31 is more convenient for the downhole tools to carry out the axial maintenance, repair and detection operation along the pipeline 14.

[0041] The above technical features constitute the embodiments of the present application, which have strong adaptability and implementation effect. The unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A pressurized inclined orifice opening device for oil and gas transportation pipelines, characterized in that... The system includes a guide tube, a drilling tool, a drilling drive mechanism, and a control unit. The right end of the guide tube is inclined to the lower left and upper right. The drilling drive mechanism is detachably mounted on the left end of the guide tube. The drilling drive mechanism includes a U-shaped support, a guide seat, a rotary motor, a sleeve, a sleeve rod, a first mounting base, a second mounting base, a linear actuator, and a motor mounting base. The upper inner side of the U-shaped support is fixedly mounted to the outer side of the left end of the guide tube by threaded fasteners. A guide seat with its right side abutting against the left end of the guide tube is detachably mounted on the left side of the U-shaped support. The guide seat, corresponding to the middle position of the left end of the guide tube, has a stepped hole that runs through both sides and is larger on the left and smaller on the right. The rotary motor, with its left end located to the left of the guide seat, is located on the inner side of the left part of the stepped hole. The drilling tool passes through the inner side of the guide tube and the inner side of the right end of the stepped hole from right to left. It is then connected to the output end of the rotary motor. A sleeve is fixedly installed at the lower end of the U-shaped support. A sleeve rod with its left end located on the left side of the sleeve is slidably installed inside the sleeve. A first mounting seat is fixedly installed on the lower side of the left end of the sleeve rod. A second mounting seat is fixedly installed on the lower side of the right end of the sleeve corresponding to the position of the first mounting seat. A linear actuator that can extend to the left is provided between the second mounting seat and the first mounting seat. A motor mounting seat that can be detachably installed on the upper side of the left part of the sleeve rod is fixedly installed on the upper right side of the sleeve rod. A coolant inlet is provided on the lower side of the left part of the guide tube, and a coolant outlet is provided on the lower side of the right part of the guide tube. A coolant circulation system that can cool the drilling tool is provided between the coolant inlet and the coolant outlet. The control unit is connected to the drilling drive mechanism and the coolant circulation system respectively. The guide tube includes a left guide tube, a gate valve, and a right guide tube. The right end of the left guide tube is detachably connected to the left end of the gate valve via a connecting flange, and the right end of the gate valve is detachably connected to the left end of the right guide tube via a connecting flange. It also includes an end cap. After removing the U-shaped support and the drilling tool, an end cap is screwed onto the outer side of the left end of the guide tube. The coolant circulation system includes a pressure detection device, a coolant inlet pipe, a coolant circulation pump, a coolant tank, and a coolant outlet pipe. A pressure detection port is located on the upper right side of the guide pipe, and a pressure detection device is screwed into the pressure detection port. The coolant tank and the coolant inlet are connected by a coolant inlet pipe, which is equipped with a coolant circulation pump. The outlet is connected to the coolant tank via a coolant outlet pipe. The pressure detection device and the coolant circulation pump are respectively connected to the control unit. It also includes a combined seal, with a sealing ring groove provided on the inner side of the left end of the guide tube, and a combined seal that can form a dynamic seal with the outer side of the left part of the drilling tool in the sealing ring groove; The drilling drive mechanism also includes a hydraulic drive system. The rotary motor is a hydraulic motor, and the linear actuator is a hydraulic cylinder. The hydraulic motor and the hydraulic cylinder are respectively connected to the hydraulic drive system. The hydraulic drive system includes an oil tank, an oil pump, a motor control valve, and a cylinder control valve. The oil tank is connected to the oil pump, and the oil pump is connected to both the motor control valve and the cylinder control valve. The motor control valve is connected to the hydraulic motor, and the hydraulic motor is connected to the oil tank. The cylinder control valve is connected to both the hydraulic cylinder and the oil tank. The motor control valve and the cylinder control valve are electrically connected to the control unit. The drilling tool includes a tool holder, a coupling, a drilling head, and a support ring. The outer side of the left end of the tool holder is connected to the output end of the rotary motor through the coupling. The right end of the tool holder is detachably equipped with a drilling head that extends out of the guide tube. Support rings are fixedly installed on the outer side of the tool holder at intervals on the left and right. The support rings are provided with holes that allow coolant to flow. It also includes a support rod and a clamp. The lower left side of the guide tube is provided with a support rod that is inclined in the shape of upper left and lower right, and a clamp is fixedly installed at the lower end of the support rod.

2. A method of using the pressurized inclined orifice opening device for oil and gas transportation according to claim 1, characterized in that... The procedure is as follows: First, select a suitable location near the pipeline fault point and clean the pipeline surface at that location. Then, fix the right end of the guide tube to the cleaned pipeline surface and connect the coolant circulation system to the guide tube. Second, assemble the drilling tool, drilling drive mechanism, and hydraulic drive system. Control the piston rod of the hydraulic cylinder to extend to the left a certain distance through the control unit, maintaining a certain distance between the hydraulic motor and the guide seat. Then, open the gate valve to place the drilling tool into the guide tube, and simultaneously install the combined seal on the outer left side of the tool holder. Then, install the drilling drive mechanism on the outer left side of the guide tube. Third, turn on the coolant circulation pump to pump coolant into the guide tube. After the guide tube is full of coolant, turn off the coolant circulation pump and test the sealing performance between the left guide tube, the gate valve, and the right guide tube, as well as between the right guide tube and the pipeline surface. If the test is successful, proceed to the next step; the fourth step is to first turn on the oil pump to start the hydraulic motor to rotate, then turn on the coolant circulation pump, and then control the piston rod of the hydraulic cylinder to retract to the right, so that the drill bit feeds to the right along the guide tube axis. When the right end of the drill bit contacts the pipe surface, it will automatically start drilling the pipe wall. When the piston rod of the hydraulic cylinder retracts to the right to the minimum stroke, the pipe wall is drilled through, and the inclined hole drilling is completed; the fifth step is to turn off the coolant circulation pump, then control the piston rod of the hydraulic cylinder to extend to the left so that the drill bit leaves the inclined hole, turn off the hydraulic motor, and disconnect the drilling drive mechanism from the guide tube. Move the drilling drive mechanism to the left to pull the drill bit out from the left end of the guide tube. During the removal of the drill bit, close the gate valve in time, then remove the coolant inlet pipe and coolant outlet pipe, and seal the coolant inlet and outlet with sealing plugs. Finally, seal the left end of the guide tube with end caps and sealing gaskets.

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