Torque-balanced multi-screw combined type one-time hole-forming drilling tool for penetrating pipeline

Abstract

The invention discloses a torque-balanced multi-screw combined type one-time hole-forming drilling tool for penetrating through a pipeline, and belongs to the technical field of pipeline engineering. Torques of the multiple screws are synthesized through the crank mechanism, power is divided into a forward rotation part and a reverse rotation part through the gear system, the pilot bit and the reaming bit are driven to rotate forwards and backwards respectively, and therefore the purpose of torque counteracting is achieved. The screw is adopted for direct driving, and the structure is simple and reliable; torque synthesis is achieved through a connecting rod mechanism, and one-time hole-forming drilling of a large-diameter pipeline can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline engineering, in particular to the technical field of pipeline crossing construction, and specifically to a torque-balanced multi-screw combined pipeline crossing one-time hole-forming drilling tool. Background Art

[0002] During the construction of long-distance oil and gas pipelines, it is difficult to avoid crossing rivers, lakes and other areas. The current construction method of drilling a pilot hole first and then gradually expanding it is inefficient and easily causes wellbore instability. Existing screw drilling tools are mainly for conventional drilling. The size of the screw rotor and stator is limited, and it is difficult to meet the size requirements for large-diameter pipeline construction.

[0003] Chinese patent CN201310639410.6 combines screws through a positive and negative parallelogram mechanism, but due to the limitation of the axial crank size in its combination method, the limited number makes it difficult to meet the high torque requirement; and a single rotating drill bit is used at the output end, which cannot offset the counter-torque generated by rock breaking.

[0004] In summary, designing a combined screw drill bit to overcome the drill bit's counter-torque and solve the problem of drill bit torque synthesis can greatly promote the technical level of pipeline crossing construction. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a torque-balanced multi-screw combined pipeline crossing and one-time hole-forming drilling tool, which adopts multiple screw torque synthesis and drives the pilot drill bit and the reamer drill bit to rotate in the opposite direction through the transfer case to offset the rock-breaking torque.

[0006] In order to achieve the above object, the solution provided by the present invention is as follows: The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool is characterized by comprising: The cylinder of the cylindrical structure; Installed in the barrel, it includes at least two screw drills arranged in parallel with the barrel and working in parallel, and a screw assembly that converts the power fluid energy into a rotation output; A coupling connecting the output end of the screw assembly to the input end of the combined force assembly; The combined force assembly is installed in the barrel and combines the rotation output of the screw assembly into a single rotation through a connecting rod mechanism, including: A center plate with a disc-shaped structure connected to the cylinder and having an axial flow hole in the middle; A transmission shaft with an axis parallel to the axis of the cylinder, mounted on and passing through the center plate; A rod-shaped structure, with eccentric rods at both ends having parallel axes and a spacing therebetween; one end of the eccentric rod is circumferentially fixedly connected to the transmission shaft, and the other end is rotatably connected to the translation disk; Disk-type structure, with a translational disk of the resultant force axis installed at the center; One end is connected to the translation plate and the other end is connected to the transfer case input shaft, and at least one end is a resultant shaft for rotational connection; the axis of the resultant shaft is parallel to the axis of the transfer case input shaft and there is a distance therebetween, and the distance is equal to the distance between the axes of the connecting parts at both ends of the eccentric rod; The transfer case is mounted on the end of the cylinder, and an input shaft is arranged at the center position, which converts the rotation output by the combined force assembly into two rotation outputs in opposite directions at the center position and the edge position through the gear system; The drill assembly converts the two rotation outputs at the center and edge of the transfer case into rock breaking action, including: The ring-shaped structure is connected to the reamer bit at the edge of the transfer case for rotation output; The disc-shaped structure is provided with a flow channel connecting the inner cavity of the central shaft with the outside, and is connected to a pilot drill bit for rotating output at the center position of the transfer case.

[0007] The coupling is a universal coupling.

[0008] The screw assembly also includes: A disc-shaped structure connected to the barrel, a rear baffle and a front baffle provided at both ends of the screw drill and connected to the screw drill; The disc-shaped structure is arranged in the middle area of ​​the screw drill and serves as a partition to support and fix the screw drill.

[0009] It also includes a transition plate arranged between the combined force shaft and the input shaft of the transfer case, the combined force shaft is inserted into the transition plate, and the transition plate and the input shaft of the transfer case are circumferentially fixedly connected.

[0010] The side of the reamer drill bit away from the rotary drum is provided with cutting teeth or a drill bit, and the side of the pilot drill bit away from the central axis is provided with cutting teeth or a drill bit.

[0011] The transfer case also includes: Disc-shaped structure, with a rear end cover fixedly connected to the end of the cylinder; A disc-shaped structure, which is placed on the side of the rear end cover away from the cylinder body and is a front end cover fixed relatively to the rear end cover; The axis coincides with the axis of the rear end cover and is installed between the rear end cover and the front end cover; An outer gear ring disposed outside the center wheel; A planetary gear disposed between the center wheel and the outer gear ring and meshing with each other, with the axis relatively fixed to the rear end cover; It runs through the center of the rear cover and the front cover, has a hollow structure, and is provided with a through hole connecting the inner and outer spaces near the side of the combined force component, passes through the center wheel and is fixedly connected to the center wheel in the circumferential direction, and is connected to the center axis of the pilot drill bit; The cylindrical structure is sleeved on the outside of the outer gear ring and is fixedly connected to the outer gear ring in the circumferential direction and connected to the rotating cylinder of the reaming drill bit.

[0012] A circumferential annular groove is arranged on the outer side of the front end cover, and a limiting pin is arranged on the rotating drum at the position of the annular groove, and the limiting pin axially fixes the rotating drum and the front end cover.

[0013] The transfer case further comprises: a cylindrical structure, a spacer sleeve arranged between the rear end cover and the front end cover, and an axis thereof being parallel to the axis of the cylinder.

[0014] The transfer case also includes a bolt assembly that penetrates the rear end cover and the front end cover and axially fixes the rear end cover and the front end cover.

[0015] The transfer case further includes a fixed shaft that passes through the planetary gear and is fixed between the rear end cover and the front end cover.

[0016] Compared with the prior art, the present invention has the following advantages: (1) The present invention uses multiple screws working in parallel, can be implemented using existing screw drilling tools and meet the requirements of large torque for pipeline crossing construction, and has strong feasibility; (2) The torque of multiple screws is synthesized through the connecting rod mechanism, and the kinematic pair of the connecting rod mechanism is in contact with each other, making the connection simple and reliable; (3) The transfer case converts power into rotation of the reamer bit and pilot bit. The two bits rotate in opposite directions, and the rock-breaking torques cancel each other out, thereby reducing the torque of the drill string from the source, which is beneficial to pipeline crossing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an assembly principle diagram of embodiment 1 of the present invention; Figure 2 is a cross-sectional view of embodiment 1 of the present invention; Figure 3 is a cross-sectional view of embodiment 1 of the present invention; Figure 4 is a cross-sectional view of embodiment 1 of the present invention; In the figure: Rear baffle 11, screw drill 12, partition 13, front baffle 14; Transmission shaft 21, center plate 22, eccentric rod 23, pin shaft 24, translation plate 25, combined force shaft 26, transition plate 27; Central shaft 31, rear end cover 32, spacer 33, fixed shaft 34, planetary gear 35, outer gear ring 36, central gear 37; rotating drum 38, front end cover 39, bolt assembly 310, limit pin 311; Cylinder body 4, coupling 5, reaming drill bit 6, cutting teeth 7, pilot drill bit 8. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto. Implementation

[0019] As shown in the attached drawings, a torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool comprises a screw assembly, a force-combining assembly, a transfer assembly, a drill bit assembly, a coupling 5 and a barrel 4.

[0020] The screw assembly is installed in the barrel 4, including at least two screw drills 12 arranged in parallel with the barrel 4 and working in parallel, converting the power fluid energy into rotation output, including: a rear baffle 11, a screw drill 12, a partition 13, and a front baffle 14.

[0021] The barrel 4 is a cylindrical structure, the screw assembly is placed in the barrel 4, and there are at least two screw drill tools 12, and the axis thereof is parallel to the axis of the barrel 4.

[0022] The rear baffle 11 , the partition 13 and the front baffle 14 are all disc-shaped structures, and the two ends of the screw drill 12 are connected to the rear baffle 11 and the front baffle 14 respectively.

[0023] The partition plate 13 is arranged in the middle area of ​​the screw drill 12 to support and strengthen the screw drill 12 .

[0024] The rear baffle 11 and the front baffle 14 are connected to the cylinder 4 and are fixed by screws in this embodiment.

[0025] The coupling 5 connects the output end of the screw assembly and the input end of the combined force assembly. In this embodiment, the coupling 5 is a universal coupling 5.

[0026] The combined force assembly is installed in the barrel 4, and combines the rotation output of the screw assembly into a single rotation through a connecting rod mechanism, including: a transmission shaft 21, a center plate 22, an eccentric rod 23, a pin shaft 24, a translation disk 25, a combined force shaft 26, and a transition disk 27.

[0027] The center plate 22 is a disc-shaped structure and is connected to the cylinder 4. In this embodiment, screws are used to fix the center plate 22. An axial flow hole is provided in the middle of the center plate 22.

[0028] The axis of the transmission shaft 21 is parallel to the axis of the cylinder 4 , and the transmission shaft 21 is mounted on the center plate 22 and passes through the center plate 22 .

[0029] The eccentric rod 23 is a rod-shaped structure, and the axes of the connecting parts at both ends are parallel and spaced. One end of the eccentric rod 23 is fixedly connected to the transmission shaft 21 in the circumferential direction, and the other end is rotatably connected to the translation disk 25. In this embodiment, the pin 24 is arranged between the translation disk 25 and the eccentric rod 23, one end of the pin 24 is inserted into the translation disk 25, and the other end is inserted into the end of the eccentric rod 23; the eccentric rod 23 and the transmission shaft 21 adopt a molded surface to match to transmit torque.

[0030] The translation disk 25 is a disk-shaped structure, the axis of the translation disk 25 is parallel to the axis of the cylinder 4, and the resultant force shaft 26 is installed at the center of the translation disk 25. In this embodiment, the translation disk 25 and the resultant force shaft 26 are matched with cylindrical surfaces.

[0031] One end of the resultant shaft 26 is connected to the translation plate 25, and the other end is connected to the input shaft of the transfer case. In this embodiment, the resultant shaft 26 is connected to the central shaft 31. The axis of the resultant shaft 26 is parallel to the axis of the central shaft 31 and there is a distance between them. The distance between the resultant shaft 26 and the central shaft 31 is equal to the distance between the axis of the connecting parts at both ends of the eccentric rod 23. At least one end of the resultant shaft 26 is a rotation connection.

[0032] A transition plate is provided between the resultant shaft 26 and the central shaft 31 , the resultant shaft 26 is inserted into the transition plate, and the transition plate and the central shaft 31 are circumferentially fixedly connected; in this embodiment, the transition plate and the central shaft 31 are matched with a molded surface to transmit torque.

[0033] The transfer case is installed at the end of the cylinder 4, and the input shaft is set at the center position. The rotation output by the combined force component is converted into two rotation outputs at the center position and the edge position through the gear system, and the rotation directions of the two rotations at the center position and the edge position are opposite. The transfer case includes: a center shaft 31, a rear end cover 32, a spacer sleeve 33, a fixed shaft 34, a planetary gear 35, an outer ring gear 36, a center wheel 37; a rotating cylinder 38, a front end cover 39, a bolt assembly 310, and a limit pin 311.

[0034] The rear end cover 32 is a disc-shaped structure, and the rear end cover 32 is fixedly connected to the end of the cylinder 4.

[0035] The front end cover 39 is a disc-shaped structure. The front end cover 39 is placed on a side of the rear end cover 32 away from the cylinder 4 and is fixed relative to the rear end cover 32 .

[0036] The spacer 33 is a cylindrical structure, and is disposed between the rear end cover 32 and the front end cover 39, and the axis of the spacer 33 is parallel to the axis of the cylinder 4; the bolt assembly 310 penetrates the rear end cover 32 and the front end cover 39, and axially fixes the rear end cover 32 and the front end cover 39. In this embodiment, the bolt assembly 310 passes through the center hole of the spacer 33.

[0037] The axis of the center wheel 37 coincides with the axis of the rear end cover 32. The center wheel 37 is arranged at the center position between the rear end cover 32 and the front end cover 39. The outer gear ring 36 is arranged outside the center wheel 37. The planetary wheel 35 is arranged between the center wheel 37 and the outer gear ring 36 and meshes with each other. The axis of the planetary wheel 35 is relatively fixed to the rear end cover 32.

[0038] The central shaft 31 passes through the center of the rear cover 32 and the front cover 39. The central shaft 31 is a hollow structure. A through hole is set on the side of the central shaft 31 close to the combined force component to connect the inner and outer spaces. The central shaft 31 passes through the central wheel 37 and is fixedly connected in the circumferential direction. In this embodiment, the two are matched with keyways.

[0039] The fixed shaft 34 passes through the planetary gear 35 and is fixed between the rear end cover 32 and the front end cover 39 .

[0040] The rotating drum 38 is a cylindrical structure and is sleeved on the outside of the outer gear ring 36. The rotating drum 38 and the outer gear ring 36 are fixedly connected in the circumferential direction; in this embodiment, the two are matched with a keyway.

[0041] The rotating drum 38 is axially fixedly connected to the front end cover 39 , a circumferential annular groove is arranged on the outer side of the front end cover 39 , and a limiting pin 311 is arranged on the rotating drum 38 at the position of the annular groove.

[0042] The drill bit assembly converts the two rotation outputs at the center and edge of the transfer case into rock breaking action, including: an eye-reaming drill bit 6 and a pilot drill bit 8.

[0043] The reamer 6 is a circular ring structure, and the reamer 6 is connected to the rotation output at the edge of the transfer case. In this embodiment, the reamer 6 is connected to the rotary drum 38, and a cutting tooth 7 or a drill bit is arranged on the side of the reamer 6 away from the rotary drum 38.

[0044] The pilot drill bit 8 is a disc-shaped structure, and the pilot drill bit 8 is connected to the rotation output at the center of the transfer case. In this embodiment, the pilot drill bit 8 is connected to the central shaft 31, and a cutting tooth 7 or a drill bit is provided on the side of the pilot drill bit 8 away from the central shaft 31. The pilot drill bit 8 is provided with a flow channel to connect the inner cavity of the central shaft 31 with the outside.

[0045] The working principle of this embodiment 1 is as follows: The screw assembly is installed in the barrel 4, and at least two screw drills 12 work in parallel to convert the power fluid energy into rotation output.

[0046] The output end of the screw assembly is connected to the input end of the force-combining assembly through a coupling 5.

[0047] The rational assembly combines the rotation output of the screw assembly into a single rotation through a connecting rod mechanism. Multiple eccentric rods 23 rotate synchronously, driving the translation disk 25 to perform translation. The center position of the translation disk 25 performs circular motion. The circular motion drives the input shaft of the transfer case to move through the combined force shaft 26.

[0048] The transfer case is mounted on the end of the cylinder 4, and an input shaft is set at the center position. The rotation output by the combined force assembly is converted into two opposite rotation outputs at the center position and the edge position through a gear system. The two rotation outputs of the transfer case respectively drive the reamer bit 6 and the pilot bit 8 of the drill bit assembly to rotate, and the reamer bit 6 and the pilot bit 8 rotate in opposite directions. Therefore, the counter-torques generated by the drill bit assembly offset each other, and the torque of the rear end pipe string is greatly reduced or even zero, which greatly improves the reliability of drilling.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present invention should be covered within the protection scope of the present invention.

Claims

1. Torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool, characterized in that: include: The cylinder of the cylindrical structure; Installed in the barrel, it includes at least two screw drills arranged in parallel with the barrel and working in parallel, and a screw assembly that converts the power fluid energy into a rotation output; A coupling connecting the output end of the screw assembly to the input end of the combined force assembly; The combined force assembly is installed in the barrel and combines the rotation output of the screw assembly into a single rotation through a connecting rod mechanism, including: A center plate with a disc-shaped structure connected to the cylinder and having an axial flow hole in the middle; A transmission shaft with an axis parallel to the axis of the cylinder, mounted on and passing through the center plate; A rod-shaped structure, with eccentric rods at both ends having parallel axes and a spacing therebetween; one end of the eccentric rod is circumferentially fixedly connected to the transmission shaft, and the other end is rotatably connected to the translation disk; Disk-type structure, with a translational disk of the resultant force axis installed at the center; One end is connected to the translation plate and the other end is connected to the transfer case input shaft, and at least one end is a resultant shaft for rotational connection; the axis of the resultant shaft is parallel to the axis of the transfer case input shaft and there is a distance therebetween, and the distance is equal to the distance between the axes of the connecting parts at both ends of the eccentric rod; The transfer case is mounted on the end of the cylinder, and an input shaft is arranged at the center position, which converts the rotation output by the combined force assembly into two rotation outputs in opposite directions at the center position and the edge position through the gear system; The drill assembly converts the two rotation outputs at the center and edge of the transfer case into rock breaking action, including: The ring-shaped structure is connected to the reamer bit at the edge of the transfer case for rotation output; The disc-shaped structure is provided with a flow channel connecting the inner cavity of the central shaft with the outside, and is connected to a pilot drill bit for rotating output at the center position of the transfer case.

2. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 1 is characterized in that: The coupling is a universal coupling.

3. The torque-balanced multi-screw combined pipe-penetrating one-time hole-forming drilling tool according to claim 1 is characterized in that: The screw assembly also includes: A disc-shaped structure connected to the barrel, a rear baffle and a front baffle provided at both ends of the screw drill and connected to the screw drill; The disc-shaped structure is arranged in the middle area of ​​the screw drill and serves as a partition to support and fix the screw drill.

4. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 1 is characterized in that: It also includes a transition plate arranged between the combined force shaft and the input shaft of the transfer case, the combined force shaft is inserted into the transition plate, and the transition plate and the input shaft of the transfer case are circumferentially fixedly connected.

5. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 1 is characterized in that: The side of the reamer drill bit away from the rotary drum is provided with cutting teeth or a drill bit, and the side of the pilot drill bit away from the central axis is provided with cutting teeth or a drill bit.

6. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 1 is characterized in that: The transfer case also includes: Disc-shaped structure, with a rear end cover fixedly connected to the end of the cylinder; A disc-shaped structure, which is placed on the side of the rear end cover away from the cylinder body and is a front end cover fixed relatively to the rear end cover; The axis coincides with the axis of the rear end cover and is installed between the rear end cover and the front end cover; An outer gear ring disposed outside the center wheel; A planetary gear disposed between the center wheel and the outer gear ring and meshing with each other, with the axis relatively fixed to the rear end cover; It runs through the center of the rear cover and the front cover, has a hollow structure, and is provided with a through hole connecting the inner and outer spaces near the side of the combined force component, passes through the center wheel and is fixedly connected to the center wheel in the circumferential direction, and is connected to the center axis of the pilot drill bit; The cylindrical structure is sleeved on the outside of the outer gear ring and is fixedly connected to the outer gear ring in the circumferential direction and connected to the rotating cylinder of the reaming drill bit.

7. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 6 is characterized in that: A circumferential annular groove is arranged on the outer side of the front end cover, and a limiting pin is arranged on the rotating drum at the position of the annular groove, and the limiting pin axially fixes the rotating drum and the front end cover.

8. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 6 is characterized in that: The transfer case also includes: A cylindrical structure, a spacer sleeve arranged between the rear end cover and the front end cover, with its axis parallel to the axis of the cylinder.

9. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 6, characterized in that: The transfer case also includes: A bolt assembly that penetrates the rear cover and the front cover and axially fixes the rear cover and the front cover.

10. The torque-balanced multi-screw combined type pipeline-crossing one-time hole-forming drilling tool according to claim 6, characterized in that: The transfer case further includes a fixed shaft that passes through the planetary gear and is fixed between the rear end cover and the front end cover.

Images