Hole opening assembly of pipeline pressure hole opening device

Abstract

The utility model relates to the technical field of pipeline tapping, in particular to a tapping assembly of a pipeline tapping device under pressure. A tapping assembly of the pipeline pressure tapping device comprises a mounting support, a fixing sleeve is mounted on the mounting support, a drill rod is rotationally assembled in the fixing sleeve in a sealed mode, the fixing sleeve is sleeved with a driving sleeve in a threaded mode, and the driving sleeve and the drill rod are relatively fixed in the axial direction and can relatively rotate in the circumferential direction. The tapping assembly of the pipeline pressure tapping device further comprises a driving mechanism, the driving mechanism is in transmission connection with the drill rod to drive the drill rod to rotate, the driving mechanism is in transmission connection with the driving sleeve to drive the driving sleeve to rotate around the fixed sleeve, and when the driving sleeve rotates, the driving sleeve carries the drill rod to linearly act along the fixed sleeve to drive the drill rod to advance and retreat. The drill bit advances and retreats while being driven by the driving mechanism to rotate, manual operation is not needed, and application is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline opening, in particular to a pipeline pressure opening device opening component. Background Art

[0002] Oil well casing is in a sealed state all year round. Due to well repair or other reasons, it is necessary to perform drilling operations on the casing at the wellhead. Since it is impossible to determine whether there is combustible gas and pressure inside the casing, it is not possible to blindly use fire to drill holes. It is necessary to assume that there is high-pressure combustible gas in the casing and perform the drilling operation without fire under controllable conditions.

[0003] A Chinese utility model patent with authorization announcement number CN207131361U discloses a pressure-drilling device, which includes a dowel rod extending in a front-to-back direction. The rear end of the dowel rod is the dowel rod operating end. A pressure tube is provided on the outside of the dowel rod. The pressure tube and the dowel rod rotate in conjunction and the two are stopped in the axial direction of the dowel rod. The outer surface of the pressure tube is threadedly connected to a fixed sleeve. The rear end of the pressure tube extends out of the fixed sleeve to form the pressure tube operating end. The pressure tube operating end is provided with an operating handle. The front end of the dowel rod is provided with a drill clamp for mounting the drill bit. When the device is used, the fixed sleeve is fixed to the wellbore. By rotating the operating handle on the pressure tube, the pressure tube moves forward, and the pressure tube moves forward with the dowel rod, achieving drill bit feeding. The rear end of the dowel rod is the dowel rod operating end. By applying force to the dowel rod operating end, the dowel rod is rotated to drive the drill bit to rotate, achieving rotary drilling. When the device is used, both drill bit rotation and drill bit feeding need to be completed manually, which is relatively inconvenient.

[0004] Chinese utility model patent application number CN205673642U discloses a pipe tapping machine under pressure. The machine comprises a housing with a drill advance / retract mechanism mounted within it. The left end of the mechanism is connected to an operating handle, and the right end is connected to a drive shaft. The drive shaft extends rightward from the housing, and a drill bit is mounted on the right end of the drive shaft. The housing is connected to a reduction gearbox housing, which is connected to an expansion tube. The drive shaft passes through the reduction gearbox housing and extends into the expansion tube, allowing the drill bit to extend out of the expansion tube. A connecting flange is provided at the end of the expansion tube. The drive mechanism is connected to the input shaft of the reduction gearbox, and the output end of the reduction gearbox is in transmission connection with the drive shaft. In use, the expansion tube is fixed to the wellbore. The drive mechanism rotates the drive shaft, which in turn drives the drill bit, achieving rotary drilling. Turning the operating handle advances and retracts the drive shaft, achieving drill advance and withdrawal.

[0005] When the pipeline pressure hole opening machine is used, the driving mechanism can drive the drill bit to rotate, but the drill bit feeding and withdrawal still need to be completed manually, so there is still the problem of inconvenient operation, and manual operation cannot ensure the uniform and continuous advance and retreat of the drill bit. First, it is not conducive to improving the efficiency of the hole opening operation. Second, in some emergency situations, the drill bit withdrawal speed is too slow, which may also lead to safety hazards. Utility Model Content

[0006] The purpose of the utility model is to provide a drilling assembly for a pipeline pressure drilling device, so as to solve the problem that the existing pipeline pressure drilling machine needs manual operation to complete the feeding and withdrawal of the drill bit, which is inconvenient to operate.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A hole-opening assembly for a pipeline pressure-opening device includes a mounting bracket, a fixed sleeve is mounted on the mounting bracket, a drill rod is sealed and rotatably assembled inside the fixed sleeve, a driving sleeve is threadedly sleeved on the outside of the fixed sleeve, the driving sleeve and the drill rod are relatively fixed in the axial direction and can rotate relative to each other in the circumferential direction, and the hole-opening assembly for the pipeline pressure-opening device also includes a driving mechanism, the driving mechanism is transmission-connected to the drill rod to drive the drill rod to rotate, and the driving mechanism is transmission-connected to the driving sleeve to drive the driving sleeve to rotate around the fixed sleeve, and when the driving sleeve rotates, it carries the drill rod to move in a straight line along the fixed sleeve to drive the drill rod forward and backward.

[0009] Beneficial effects: The utility model proposes a new hole-opening assembly for a pressure-opening device for a pipeline, which is a pioneering invention. The mounting bracket serves as the mounting base of the entire device. A fixed sleeve is installed on the mounting bracket. The fixed sleeve is used to be fixedly connected to an outlet short circuit or valve installed on the pressure pipeline. A drill rod is assembled in a sealed and rotatable manner inside the fixed sleeve to ensure that the drill rod maintains a sealed state with the fixed sleeve during rotation, thereby achieving pressure-opening and preventing gas leakage. A drive sleeve is threadedly sleeved on the external surface of the fixed sleeve, and the drive sleeve and the drill rod are relatively fixed in the axial direction and can rotate relative to each other in the circumferential direction, so that when the drive sleeve is rotated, the drive sleeve moves linearly along the fixed sleeve, thereby driving the drill rod forward and backward. By configuring a drive mechanism, the drive mechanism is connected to the drill rod to drive the drill rod to rotate, and the drive mechanism is connected to the drive sleeve to drive the drive sleeve to rotate around the fixed sleeve. When the drive sleeve rotates, it carries the drill rod and moves linearly along the fixed sleeve to drive the drill rod forward and backward, thereby achieving automatic rotation of the drill bit and automatic advancement and retreat of the drill bit, without the need for manual operation, and more convenient application.

[0010] Furthermore, the drive sleeve and the drill rod are relatively rotated by a rotation support structure, and the rotation support structure is assembled together with the drive sleeve and the drill rod in a relatively fixed axial direction.

[0011] Furthermore, the rotation support structure includes a bearing seat fixedly mounted on the drive sleeve, a thrust bearing and a bearing pressure cover for pressing the thrust bearing onto the bearing seat are mounted on the bearing seat, the drill rod is rotatably mounted on the bearing seat through the thrust bearing so that the drill rod and the drive sleeve can rotate relative to each other in the circumferential direction, a limiting boss is provided on the drill rod, and the limiting boss and the bearing pressure cover are stopped and cooperated in the axial direction of the drill rod so that the drill rod and the drive sleeve are axially fixed.

[0012] Furthermore, a screw-in gear is provided on the bearing seat, the driving mechanism has two output ends, one is connected to the drill rod, and the other is connected to the screw-in gear. The driving mechanism is axially fixed to the drill rod, and the driving mechanism is movably installed on the mounting bracket along the axial guide of the drill rod.

[0013] Furthermore, the driving mechanism includes a driving motor and a power diversion mechanism. The input end of the power diversion mechanism is connected to the driving motor. The power diversion mechanism has a high-speed output end and a low-speed output end, and the high-speed output end and the low-speed output end constitute the two output ends of the driving mechanism. The high-speed output end is connected to the drill rod, and the low-speed output end is connected to the screw gear.

[0014] Furthermore, dynamic sealing structures are respectively provided between the inner wall surface of the fixed sleeve near the two ports and the drill rod.

[0015] Furthermore, the inner sides of both ends of the fixed sleeve are stepped structures, and the large diameter section of the stepped structure is arranged outward. The dynamic sealing structure includes a packing sealing assembly installed between the large diameter section and the drill pipe and a pressure cap for pressing the packing sealing assembly onto the step surface of the stepped structure.

[0016] Furthermore, the packing sealing assembly includes guide rings spaced apart in the axial direction and packing arranged between the guide rings. The guide ring on the inner side is engaged with the step surface, and the guide ring on the outer side is tightly engaged with the pressure cap. The guide ring is mounted on the outside of the drill rod to guide the advance and retreat of the drill rod and clamp the packing in the axial direction.

[0017] Furthermore, a sleeve joint is threadedly connected to the front end of the fixed sleeve, and the sleeve joint is pressed tightly onto the end pressure cap.

[0018] Furthermore, an annular gap is provided between the driving sleeve and the fixed sleeve, and a threaded sleeve is provided at one end of the driving sleeve and is threadedly mounted on the outside of the fixed sleeve through the threaded sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of the opening component of the pressure-opening device for pipes of the utility model when in use;

[0020] Figure 2 It is a structural diagram of the power diversion mechanism;

[0021] Figure 3 This is a structural diagram of the outlet short-circuit welded on the fastening slip;

[0022] In the figure: 1. Drill bit; 2. Drill rod; 3. Sleeve clamp; 4. Pressure cap; 5. Guide ring; 6. Packing; 7. Fixed sleeve; 8. Screw sleeve; 9. Drive sleeve; 10. Bearing cover; 11. Bearing seat; 14. Thrust bearing; 15. Power diversion mechanism; 15-1. Bracket plate; 15-2. Screw; 15-3. Transmission shaft; 15-4. Reduction gear pair; 15-5. Output gear; 16. Drive motor; 17. Valve; 18. Short-circuit clamp; 19. Outlet short-circuit; 20. Threaded short-circuit; 21. Vent valve; 22. Pressure gauge; 23. Pressurized pipeline; 24. Mounting bracket; 25. Screw-in gear; 26. Fixing bolt; 27. Rubber gasket; 28. O-type copper sealing ring; 29. ​​Fastening slips. DETAILED DESCRIPTION

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] Existing pipeline pressure tapping machines require manual operation to complete the drill bit feeding and retracting, which is inconvenient to operate. The utility model provides a drilling assembly for a pipeline pressure tapping device, which drives the drill bit to rotate and simultaneously advance and retract the drill bit through a driving mechanism, making operation more convenient.

[0025] The basic principle of the drilling assembly of the present invention's pressurized pipeline drilling device is as follows: a fixed sleeve is mounted on a mounting bracket and is used to securely connect to an outlet short circuit or valve installed on the pressurized pipeline. A drill rod is mounted within the fixed sleeve for sealing and rotation, allowing the drill rod to rotate freely and forming a dynamic seal with the fixed sleeve during rotation. A drive sleeve is threadedly mounted on the fixed sleeve's exterior. The drive sleeve and the drill rod are relatively fixed in the axial direction of the drill rod and can rotate relative to each other in the circumferential direction. As the drive sleeve rotates, the drive sleeve advances or retreats along the fixed sleeve, driving the drill rod to move together, thereby advancing and retreating the drill bit. A drive mechanism is configured to be transmission-connected to the drill rod to drive rotation of the drill rod, and the drive mechanism is transmission-connected to the drive sleeve to drive rotation of the drive sleeve. As the drive sleeve rotates, it carries the drill rod in a linear motion along the fixed sleeve, thereby advancing and retreating the drill rod. The drive mechanism drives the drill bit to rotate, enabling automatic advancement and retreat of the drill bit, eliminating the need for manual operation and making it more convenient to use.

[0026] Based on the principle of the above scheme, the specific embodiment of the hole-opening component of the pipeline pressure hole-opening device of the present invention is introduced in detail below.

[0027] like Figure 1As shown, the drilling assembly of the pressurized pipeline drilling device of the present invention includes a mounting bracket 24, on which a fixed sleeve 7 is mounted. The fixed sleeve 7 is made of a steel pipe, and the mounting bracket 24 is welded and formed using angle steel. The fixed sleeve 7 is welded to one end of the mounting bracket 24. The extension direction of the pressurized pipeline 23 is defined as the up-down direction. The fixed sleeve 7 extends in the front-to-back direction. The fixed sleeve 7 is used to be fixedly connected to the valve 17 installed on the pressurized pipeline 23. The fixed sleeve 7 is internally sealed and rotatably assembled with a drill rod 2. The front end of the drill rod 2 is provided with a drill bit 1. The diameter of the drill rod 2 is smaller than the inner diameter of the fixed sleeve 7, forming an annular gap between the two. A dynamic sealing structure is provided between the drill rod 2 and the fixed sleeve 7 to achieve a sealed fit between the two. Specifically, the inner sides of both ends of the fixed sleeve 7 are stepped structures, with the large diameter section of the stepped structure facing outward. A dynamic sealing structure is provided at the large diameter section of the stepped structure. The dynamic sealing structure includes a packing seal assembly installed between the large diameter section and the drill pipe 2, and a pressure cap 4 that presses the packing seal assembly against the step surface of the stepped structure. The pressure cap 4 is threadedly connected to the end of the fixed sleeve 7. The pressure cap 4 presses the packing seal assembly against the step surface of the stepped structure so that the packing seal assembly fits and seals against the outer surface of the drill pipe 2. The packing seal assembly includes two guide rings 5 ​​spaced apart in the axial direction and a packing 6 arranged between the two guide rings 5. The inner guide ring 5 is engaged with the step surface, and the outer guide ring 5 is tightly engaged with the pressure cap 4. The two guide rings 5 ​​clamp the packing 6 in the axial direction. The two guide rings 5 ​​are mounted on the outside of the drill pipe 2 to straighten and center the drill pipe 2, guiding the advance and retreat of the drill pipe 2. By clamping the packing 6 in the axial direction through two guide rings 5 ​​set at intervals, it is possible to better prevent the packing 6 from being offset in position and causing a weakening of the seal or a failure of the seal. The two guide rings 5 ​​jointly guide the drill pipe 2, which is more conducive to ensuring that the drill pipe 2 moves in a straight line along the axial direction, and avoiding the drill pipe 2 from being deflected and causing a failure of the seal.

[0028] Dynamic sealing structures are provided between the fixed sleeve 7 and the drill pipe 2 at both ends, achieving a double seal to prevent pressure leakage after pressure drilling, further improving safety. In the prior art, a sealing ring is used at one end between the drill pipe and the outer sleeve, and the other end is the operating end. This has a low pressure resistance, generally below 4 MPa. In the present utility model, a double dynamic seal is achieved by compressing a packing seal assembly with a pressure cap at each end of the fixed sleeve, enabling high-pressure drilling of 20 MPa under pressure, with a higher safety factor. In addition, the sealing structure uses a packing seal assembly, which has better sealing performance and more reliable sealing than using a sealing ring.

[0029] The front end of the fixed sleeve 7 is threadedly connected to a sleeve joint, specifically a sleeve clamp 3, which is used to seal and securely connect with the valve clamp to secure the fixed sleeve 7 to the valve 17. The sleeve clamp 3 is pressed against the front end pressure cap 4, further preventing the front end pressure cap 4 from loosening and causing a loose seal between the front packing seal assembly and the drill pipe 2, further improving sealing reliability. Of course, the sleeve clamp 3 can also be simply fixedly connected to the front end of the fixed sleeve 7, without pressing against the front end pressure cap 4.

[0030] The fixed sleeve 7 is externally threaded with a drive sleeve 9. Drive sleeve 9 is made of steel pipe. The inner diameter of drive sleeve 9 is larger than the outer diameter of fixed sleeve 7, forming an annular gap between the two. A threaded sleeve 8 is welded to the front end of drive sleeve 9, which is internally threaded. Drive sleeve 9 is threaded onto the exterior of fixed sleeve 7 via threaded sleeve 8. Rotating drive sleeve 9 allows drive sleeve 9 to move linearly along fixed sleeve 7. Drive sleeve 9 and drill rod 2 are axially fixed and circumferentially rotatable relative to each other. Relative rotation between drive sleeve 9 and drill rod 2 is achieved via a rotational support structure, which is assembled to axially fix the drive sleeve 9 and drill rod 2. Specifically, the rotational support structure includes a bearing seat 11 and a thrust bearing 14 mounted on bearing seat 11. Bearing seat 11 is threadedly mounted on the rear end of drive sleeve 9. Bearing seat 11 has bearing mounting grooves on its front and rear sides. Thrust bearing 14 is mounted in the bearing mounting grooves and is compressed by a bearing gland 10, which is threadedly connected to bearing seat 11. The assembled bearing seat 11 is placed over the rear end of the drill rod 2. The drill rod 2 is rotatably mounted on the bearing seat 11 via the thrust bearing 14, enabling the drill rod 2 and the drive sleeve 9 to rotate relative to each other in the circumferential direction. A rearward-facing limit boss is provided on the drill rod 2. The limit boss mates with the front bearing gland 10 to form a stop in the axial direction of the drill rod 2, thereby securing the drill rod 2 and the drive sleeve 9 relative to each other in the axial direction of the drill rod 2.

[0031] By fixing a bearing seat 11 at the rear end of the drive sleeve 9 and installing a thrust bearing 14 on the bearing seat 11, the drill rod 2 is inserted into the thrust bearing 14 to achieve relative rotation of the drill rod 2 and the drive sleeve 9 in the circumferential direction. The right end of the drill rod 2 is supported by the bearing seat 11, which can make the rotation support between the drive sleeve 9 and the drill rod 2 more reliable and more conducive to ensuring the horizontality of the drill rod 2. Of course, in other embodiments, the bearing seat 11 can also be omitted, and the drive sleeve 9 and the drill rod 2 can directly achieve relative rotation through the bearing. The drill rod 2 is connected to the inner ring of the bearing, and the drive sleeve 9 is connected to the outer ring of the bearing. In this case, the bearing constitutes a rotation support structure, and the bearing, the drive sleeve 9, and the drill rod 2 are relatively fixed axially.

[0032] The hole-opening assembly of the pipeline pressure hole-opening device also includes a driving mechanism, which is connected to the drill rod 2 to drive the drill rod 2 to rotate. At the same time, the driving mechanism is connected to the driving sleeve 9 to drive the driving sleeve 9 to rotate around the fixed sleeve 7. Since the driving sleeve 9 is threadedly mounted on the outside of the fixed sleeve 7, when the driving sleeve 9 rotates around the fixed sleeve 7, it will rotate axially along the fixed sleeve 7, thereby driving the drill rod 2 to make axial displacement, thereby realizing the advance and retreat of the drill bit 1.

[0033] The drive mechanism includes a drive motor 16 and a power diversion mechanism 15. The drive motor 16 is an explosion-proof motor. The input end of the power diversion mechanism 15 is transmission-connected to the drive motor 16. The power diversion mechanism 15 has a high-speed output end and a low-speed output end, which constitute the two output ends of the drive mechanism. The high-speed output end is transmission-connected to the drill rod 2 to drive the drill rod 2 to rotate at high speed, thereby achieving high-speed rotary drilling of the drill bit 1. The rear end of the drive sleeve 9 is fixedly mounted with a bearing seat 11. The rear end surface of the bearing seat 11 is mounted with a screw-in gear 25. The low-speed output end is transmission-connected to the screw-in gear 25 to drive the screw-in gear 25, thereby driving the bearing seat 11 and the drive sleeve 9 to rotate at low speed. When the drive sleeve 9 rotates at low speed, it carries the drill rod 2 forward and backward axially along the fixed sleeve 7 at low speed. By controlling the feed speed of the drill rod 2 to adapt it to the high-speed rotation of the drill bit 1, the drilling quality and drilling efficiency are guaranteed. The driving mechanism is axially fixed to the drill rod 2 , and is movably mounted on the mounting bracket 24 along the axial direction of the drill rod 2 , advancing and retreating together with the drill rod 2 .

[0034] like Figure 2As shown, the power splitter mechanism 15 comprises two symmetrically arranged bracket plates 15-1, secured together by screws 15-2 and nuts to form a box-like structure. A drive shaft 15-3 is rotatably mounted on the bracket plates 15-1. A reduction gear pair 15-4 is located within the space enclosed by the bracket plates 15-1, which is in driving connection with the drive shaft 15-3. Drive shaft 15-3 has internal holes at each end. Its front end is connected to the drill rod 2, while its rear end is connected to the output shaft of the drive motor 16, thereby axially securing the drive mechanism to the drill rod 2. The rear end of drive shaft 15-3 forms the input end of the power splitter mechanism 15, while the front end of drive shaft 15-3 forms the high-speed output end of the power splitter mechanism 15. The reduction gear pair 15-4 includes a pinion mounted on the transmission shaft 15-3, an output gear 15-5 mounted on the outside of the bracket plate 15-1 near the bearing seat 11, and a gear set connected between the pinion and the output gear 15-5. The output gear 15-5 constitutes the low-speed output end of the power diversion mechanism 15 and meshes with the precession gear 25 on the bearing seat 11. The ratio of the input speed at the input end to the output speed at the low-speed output end is 120:1. In other words, when the drive motor 16 drives the drill rod 2 to rotate 120 times, the output gear 15-5 rotates one turn, the drive sleeve 9 precesses one turn on the fixed sleeve 7, and the drill rod 2 moves one pitch. By controlling the feed speed of the drill rod 2 to match the high-speed rotation of the drill bit 1, the drilling quality and efficiency are guaranteed, and the drill bit 1 is automatically fed while being driven to rotate.

[0035] The power diversion mechanism 15 and the drive motor 16 are both movably mounted on the mounting bracket 24 along the axial guide of the drill pipe 2. The mounting bracket 24 is mainly used to support the power diversion mechanism 15 and the drive motor 16 and enable the power diversion mechanism 15 and the drive motor 16 to be movable on the mounting bracket 24.

[0036] The drill bit 1 is a tapered drill bit mounted at the front end of the drill rod 2. Drilling begins with a small hole, followed by expansion, effectively preventing damage to the drill bit 1 during the drilling process. After the drive motor 16 is activated, an initial hole is drilled at the opening of the pressurized pipeline 23, acting as both a pilot hole and a positioning hole. After drilling under pressure, the presence of pressure within the pipeline is first tested. When expansion is decided, the pilot hole serves as a positioning hole for the next stage of drilling, providing increased safety.

[0037] When the hole-opening assembly of the pipeline pressure hole-opening device of the present invention is used, it needs to be used in conjunction with the outlet short circuit 19 and the valve 17 to realize the pipeline pressure hole-opening.

[0038] like Figure 1As shown, the outlet short-circuit 19 is prefabricated, and a short-circuit clamp 18 is provided at one end of the outlet short-circuit 19 for fixed connection with the valve 17. Holes are respectively opened on the upper and lower sides of the outlet short-circuit 19 and a thread short-circuit 20 is connected at the openings. A pressure gauge 22 is installed at the upper thread short-circuit 20 for detecting the pipeline pressure after the opening, and a vent valve 21 is installed at the lower thread short-circuit 20 for releasing the pressure in the pipeline after the pressurized opening. The outlet short-circuit 19 is pre-fixed on one side of the pressurized pipeline 23, and the center position of the outlet short-circuit 19 is the pressurized opening position. Figure 3 As shown, the outlet short-circuit 19 can be welded to the fastening slips 29, and fixed to one side of the pressurized pipeline 23 by the fastening slips 29. The fastening slips 29 are fastened to the pressurized pipeline 23 by means of fixing bolts 26. A rubber gasket 27 is used to seal the fastening slips 29 and the pressurized pipeline 23. At the same time, an O-type copper sealing ring 28 is installed at the end of the outlet short-circuit 19 to achieve effective sealing between the outlet short-circuit 19 and the pressurized pipeline 23.

[0039] After fixing the outlet short-circuit 19 to one side of the pressurized pipeline 23, install the valve 17 on the outlet short-circuit 19 and make the valve 17 in the fully open state, pass the drill bit 1 at the front end of the drill rod 2 through the valve 17, so that the drill bit 1 is inside the outlet short-circuit 19, and install the hole-opening component of the pipeline pressure opening device of the present invention on the rear end of the valve 17. Adjust the screw-in length of the screw sleeve 8 so that the relative distance between the drill bit 1 and the pressurized pipeline 23 is maintained at about 10 mm. Check that all components are fastened in place, check that the connection between the valve 17 and the outlet short section, the connection between the valve 17 and the fixed sleeve 7, and the pressure caps 4 at both ends of the fixed sleeve 7 are all in a sealed state, check that the connection between the drive sleeve 9 and the bearing seat 11, the power diversion mechanism 15, and the drive motor 16 is firm, and check that the output gear 15-5 of the power diversion mechanism 15 is correctly engaged with the screw-in gear 25 on the bearing seat 11. After all checks are complete, drive motor 16 is turned on. This drives drive shaft 15-3 of power splitter 15, which in turn rotates drill rod 2 clockwise. This in turn rotates drill bit 1. The power from drive motor 16 is transmitted to the input of power splitter 15. After a 120:1 reduction, output gear 15-5 rotates pre-engagement gear 25, which in turn rotates drive sleeve 9 around fixed sleeve 7. The rotation of drive sleeve 9 carries drill rod 2 forward along fixed sleeve 7, which in turn feeds drill bit 1 forward until drill bit 1 contacts pressurized pipeline 23 and drilling begins. After pressurized pipeline 23 is drilled through, the fluid inside leaks into the inner cavity of outlet short-circuit 19. The internal pressure is monitored using pressure gauge 22. If the pressure is too high, drilling can be stopped and vent valve 21 can be used to vent the fluid, controlling the internal pressure of outlet short-circuit 19. If the diameter of the hole needs to be increased, the drive motor 16 is kept on and the drilling is continued until a hole that meets the size requirements is drilled on the pressurized pipe 23, and then the drilling is stopped.

[0040] When the device needs to be dismantled after drilling is completed, the drive motor 16 is turned on to make the drive motor 16 rotate in the opposite direction, thereby driving the drill rod 2 to rotate in the opposite direction, and at the same time driving the drive sleeve 9 to rotate in the opposite direction. The drive sleeve 9 is rotated backward along the fixed sleeve 7 and drives the drill rod 2 to move backward until the drill bit 1 retreats to the outside of the valve 17, closes the valve 17, removes the hole-opening component of the pipeline pressure-opening device of the present invention, and completes the pressure-opening operation.

[0041] The opening component of the pipeline pressure opening device of the utility model can be connected to the control component when in use to realize remote control operation and avoid high-pressure injury accidents.

[0042] The valve 17 can be designed with either a clamp or flange connection, and can be a gate valve or a ball valve. These connection options allow for adaptability to varying pressures and media conditions. By varying the diameter of the outlet short-circuit 19, the drill bit 1 can be matched to accommodate various hole diameters.

[0043] In the above-mentioned embodiment, the drive sleeve and the drill rod are relatively rotated by means of a rotation support structure, and the rotation support structure is assembled with the drive sleeve and the drill rod in an axially relatively fixed manner. The advantage of such an arrangement is that it can provide reliable support for the drill rod, making the drill rod more stable during rotation and forward and backward movement. In other embodiments, the drive sleeve and the drill rod can also be directly rotated together and relatively fixed in the axial direction. For example, the drive sleeve is a cylindrical body with an open end and an end cap at the other end. The open end of the drive sleeve is provided with a threaded sleeve and is threadedly mounted on the outside of the fixed sleeve through the threaded sleeve. The middle of the end cap is provided with a through hole, and the drill rod is rotatably installed in the through hole. The end cap and the limit boss on the drill rod are engaged in the axial direction of the drill rod to achieve axial relative fixation of the drill rod and the drive sleeve.

[0044] In the above embodiment, a precession gear is provided on the bearing seat, the driving mechanism has two output ends, one of which is transmission-connected to the drill rod and the other is transmission-connected to the precession gear. The driving mechanism is axially fixed to the drill rod and is mounted on the mounting bracket so as to be movable along the axial direction of the drill rod. When the driving mechanism drives the drill rod forward or backward, the driving mechanism moves along with the drill rod. In other embodiments, the precession gear may not be provided on the bearing seat, and the driving mechanism may be fixedly mounted on the mounting bracket. The driving mechanism has two output ends, one of which is circumferentially fixed relative to the drill rod and movable relative to the axial direction, and the other of which is circumferentially fixed relative to the drive sleeve and movable relative to the axial direction. The drill rod and the drive sleeve are axially fixed and rotatable relative to each other, so that one output end of the driving mechanism drives the drill rod to rotate, while the other output end drives the drive sleeve to rotate about the fixed sleeve. When the drive sleeve rotates, it carries the drill rod in a linear motion along the fixed sleeve to drive the drill rod forward or backward.

[0045] In the above-described embodiment, the drive mechanism includes a drive motor and a power splitting mechanism. The input end of the power splitting mechanism is transmission-connected to the drive motor. The power splitting mechanism has a high-speed output end and a low-speed output end. The high-speed output end is transmission-connected to the drill rod, and the low-speed output end is transmission-connected to the feed gear. The main purpose of the power splitting mechanism is to control the feed speed of the drill rod to match the high-speed rotation of the drill bit, thereby ensuring the quality of the drilled hole. In other embodiments, both output ends of the power splitting mechanism can be high-speed output ends, one of which is transmission-connected to the drill rod, and the other is transmission-connected to the bearing seat or drive sleeve via a reduction transmission structure. Of course, the reduction transmission structure can also be omitted, and the other output end can be transmission-connected to the bearing seat or drive sleeve, with the drive sleeve rotating at the same speed as the drill rod.

[0046] In the above embodiment, dynamic sealing structures are provided between both ends of the fixed sleeve and the drill rod, achieving double sealing and further improving safety. In other embodiments, a dynamic sealing structure may be provided only between one end of the fixed sleeve and the drill rod.

[0047] In the above embodiment, the dynamic sealing structure adopts a packing seal assembly as the sealing member, which is more reliable. In other embodiments, a sealing ring can also be adopted, which wears out quickly and only needs to be replaced regularly.

[0048] In the above embodiment, the packing seal assembly includes two guide rings spaced axially apart and a packing disposed between the two guide rings. The inner guide ring engages with a stepped surface stop, while the outer guide ring abuts against a pressure cap. The two guide rings axially clamp the packing and work together to straighten and center the drill pipe. In other embodiments, only one guide ring may be provided, engaging the stepped surface stop, with the pressure cap directly pressing against the packing, thereby axially clamping the packing through the pressure cap and guide rings.

[0049] In the above embodiment, an annular gap is provided between the driving sleeve and the fixed sleeve, and a threaded sleeve is provided at one end of the driving sleeve and is threadedly mounted on the exterior of the fixed sleeve via the threaded sleeve. The advantage of this arrangement is that a gap is provided between the driving sleeve and the fixed sleeve, and the two are not directly threadedly connected. Instead, the driving sleeve is threadedly mounted on the exterior of the fixed sleeve via the threaded sleeve, eliminating the need for a large threaded mating section between the driving sleeve and the fixed sleeve. This reduces the driving force required by the driving mechanism to rotate the driving sleeve, making driving more convenient and labor-saving. Of course, in other embodiments, an internal thread may be provided inside the driving sleeve, and the driving sleeve may be directly threadedly mounted on the exterior of the fixed sleeve.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A hole-opening assembly for a pipeline pressure hole-opening device, characterized in that: The device comprises a mounting bracket, on which a fixed sleeve is mounted, a drill rod is sealably and rotatably mounted inside the fixed sleeve, a driving sleeve is threadedly mounted outside the fixed sleeve, the driving sleeve and the drill rod are relatively fixed in the axial direction and can rotate relatively in the circumferential direction, and the hole-opening assembly of the pipeline pressure hole-opening device also comprises a driving mechanism, the driving mechanism is transmission-connected to the drill rod to drive the drill rod to rotate, and the driving mechanism is transmission-connected to the driving sleeve to drive the driving sleeve to rotate around the fixed sleeve, and when the driving sleeve rotates, it carries the drill rod to move in a straight line along the fixed sleeve to drive the drill rod to advance and retreat.

2. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 1, characterized in that: The driving sleeve and the drill rod are relatively rotated via a rotating support structure, and the rotating support structure is assembled with the driving sleeve and the drill rod in a relatively fixed manner in the axial direction.

3. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 2, characterized in that: The rotating support structure includes a bearing seat fixedly mounted on the driving sleeve, a thrust bearing and a bearing pressure cover for pressing the thrust bearing onto the bearing seat are mounted on the bearing seat, the drill rod is rotatably mounted on the bearing seat via the thrust bearing so that the drill rod and the driving sleeve can rotate relative to each other in the circumferential direction, a limiting boss is provided on the drill rod, and the limiting boss and the bearing pressure cover are stopped and matched in the axial direction of the drill rod so that the drill rod and the driving sleeve are relatively fixed in the axial direction.

4. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 3, characterized in that: A screw-in gear is arranged on the bearing seat, the driving mechanism has two output ends, one of which is connected to the drill rod and the other is connected to the screw-in gear. The driving mechanism is axially fixed to the drill rod and is movably installed on the mounting bracket along the axial guide of the drill rod.

5. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 4, characterized in that: The driving mechanism includes a driving motor and a power splitting mechanism. The input end of the power splitting mechanism is transmission-connected to the driving motor. The power splitting mechanism has a high-speed output end and a low-speed output end, and the high-speed output end and the low-speed output end constitute the two output ends of the driving mechanism. The high-speed output end is transmission-connected to the drill rod, and the low-speed output end is transmission-connected to the screw-in gear.

6. The hole-opening assembly of the pipeline pressure hole-opening device according to any one of claims 1 to 5, characterized in that: The fixed sleeve is provided with dynamic sealing structures respectively between the inner wall surface near the two ports and the drill rod.

7. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 6, characterized in that: The inner sides of both ends of the fixed sleeve are stepped structures, and the large diameter section of the stepped structure is arranged outward. The dynamic sealing structure includes a packing sealing assembly installed between the large diameter section and the drill pipe and a pressure cap for pressing the packing sealing assembly onto the step surface of the stepped structure.

8. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 7, characterized in that: The packing sealing assembly includes guide rings spaced apart in the axial direction and packings arranged between the guide rings. The inner guide ring is engaged with the step surface for stopping, and the outer guide ring is tightly engaged with the pressure cap. The guide ring is sleeved on the outside of the drill pipe to guide the advance and retreat of the drill pipe and clamp the packing in the axial direction.

9. The hole-opening assembly of the pipeline pressure hole-opening device according to claim 7, characterized in that: The front end of the fixed sleeve is threadedly connected with a sleeve joint, and the sleeve joint is pressed tightly on the end pressure cap.

10. The hole-punching assembly of the pipeline pressure-punching device according to any one of claims 1 to 5, characterized in that: An annular gap is provided between the driving sleeve and the fixing sleeve. A threaded sleeve is provided at one end of the driving sleeve and is threadedly sleeved on the outside of the fixing sleeve.

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