CN214997415U - Torsion pulse screw drilling tool - Google Patents
Torsion pulse screw drilling tool Download PDFInfo
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- CN214997415U CN214997415U CN202023336954.XU CN202023336954U CN214997415U CN 214997415 U CN214997415 U CN 214997415U CN 202023336954 U CN202023336954 U CN 202023336954U CN 214997415 U CN214997415 U CN 214997415U
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Abstract
The utility model relates to a torsion pulse screw drilling tool belongs to oil, natural gas geology drilling equipment technical field, includes: the screw drill comprises a shell and a screw rotor which is rotationally connected in the shell, wherein a central through hole is formed in the screw rotor along the axial direction of the screw rotor; the pulse valve comprises a fixed valve and a movable valve which are arranged in the shell and positioned at the top of the screw rotor, and the movable valve is positioned at the bottom of the fixed valve and is mutually abutted against the fixed valve; the fixed valve is of a hollow pipe body structure with an opening at the top, the bottom of the fixed valve is provided with an eccentric hole, and the side wall of the fixed valve is provided with a shunting hole; the movable valve is provided with a pressure reducing hole communicated with the central through hole of the screw rotor, and the movable valve rotates along with the screw rotor so as to enable the pressure reducing hole to be communicated with the eccentric hole. The utility model provides a pulse valve makes the rotational speed of screw rotor take place periodic change, can provide circumferential rotational acceleration for the drill bit, improves the broken rock moment of torsion of drill bit, eliminates the stick-slip vibration and the motor braking of well drilling in-process drill bit.
Description
Technical Field
The application relates to the technical field of petroleum and natural gas geological drilling equipment, in particular to a torsion pulse screw drilling tool.
Background
At present, screw drilling tools are widely applied in the drilling process of petroleum and natural gas. The working principle of the screw drill is as follows: the mud pumped by the mud pump flows through the bypass valve and enters the motor, a certain pressure difference is formed between the inlet and the outlet of the motor, the motor rotor is pushed to rotate, and the rotating speed and the torque are transmitted to the drill bit through the universal shaft and the transmission shaft, so that the screw drilling tool can convert the hydraulic pressure energy into the mechanical energy for drilling.
In the drilling operation process, the screw drilling tool drives the drill bit to cut rock stratum and needs certain energy, and in the process, when the output torque of the motor is smaller than the cutting torque needed by rock breaking, the phenomena of stick-slip vibration of the drill bit and braking of the motor can occur. The main performance is that in the drilling process, the drill bit suddenly accelerates or decelerates, the required drilling torque is unstable, the drilling footage of the drill bit is reduced, the instrument signal is unstable, and the drilling efficiency is reduced.
In the related art, in order to solve a series of problems caused by the stick-slip vibration phenomenon of a drill bit during the operation of a screw drill, the measures mainly adopted at present are to adopt a lengthened motor, develop high-performance and high-hardness rubber to improve the torque of the screw motor, or adopt a torque impactor and other drilling speed-increasing tools, which increase the research, development, processing and manufacturing costs and increase the cost of the drilling tools.
The rotary impact screw drilling tool is provided with a transmission shaft which generates axial impact force in rotation through changing the structure of a transmission shaft assembly on the basis of the original screw drilling tool, so that the torque required by rock breaking of a drill bit is reduced to a certain extent, but the strength of the transmission shaft is weakened greatly by the structure, parts are easy to lose effectiveness in early stage, and the drilling and tripping times are increased.
Disclosure of Invention
The embodiment of the application provides a torsion pulse screw drilling tool to solve among the correlation technique screw drilling tool operation in-process, can appear drill bit stick-slip vibration, motor braking phenomenon, lead to drill bit footage to reduce, instrument signal is unstable, creeps into the problem that efficiency reduces.
The embodiment of the application provides a torsion pulse screw rod drilling tool, includes:
the screw drill comprises a shell and a screw rotor which is rotationally connected in the shell, wherein a central through hole is formed in the screw rotor along the axial direction of the screw rotor;
the pulse valve comprises a fixed valve and a movable valve, the fixed valve and the movable valve are both arranged in the shell and positioned at the top of the screw rotor, and the movable valve is positioned at the bottom of the fixed valve and is mutually abutted against the fixed valve;
the fixed valve is fixedly connected with the shell in the circumferential direction, the fixed valve is of a hollow pipe body structure with an opening at the top, an eccentric hole is formed in the bottom of the fixed valve, and a shunting hole is formed in the side wall of the fixed valve;
the movable valve is provided with a pressure reducing hole communicated with the central through hole of the screw rotor, and the movable valve rotates along with the screw rotor so as to enable the pressure reducing hole to be communicated with the eccentric hole.
In some embodiments: the fixed valve comprises a fixed valve seat and a fixed valve plate fixed at the bottom of the fixed valve seat, the fixed valve seat is of a hollow pipe structure and is circumferentially and fixedly connected with the shell, and the eccentric hole is located on the fixed valve plate.
In some embodiments: the fixed valve seat consists of an upper pipe body and a lower pipe body, and the upper pipe body is circumferentially fixed and hermetically connected with the inner wall of the shell;
the outer diameter of the lower pipe body is smaller than the inner diameter of the shell so that an annular channel is formed between the lower pipe body and the shell, and the shunting hole is located on the lower pipe body and communicated with the annular channel.
In some embodiments: the outer wall of the upper pipe body is provided with a plurality of positioning grooves along the circumferential direction of the upper pipe body, the positioning grooves are long grooves and extend along the axis direction of the upper pipe body, the outer wall of the shell is provided with a plurality of radial threaded holes, and the threaded holes are connected with screws connected with the positioning grooves in an internal thread mode.
In some embodiments: go up the outer wall of body with be equipped with multichannel sealing washer between the inner wall of casing, the multichannel the sealing washer is along the axis direction interval arrangement of casing.
In some embodiments: the top of the fixed valve plate is provided with a tapered hole communicated with the eccentric hole, the fixed valve plate is in interference connection with the fixed valve seat, and the fixed valve plate is made of hard alloy materials.
In some embodiments: the movable valve comprises a movable valve seat and a movable valve plate positioned at the top of the movable valve seat, the movable valve seat is of a hollow pipe body structure, the movable valve plate is in interference connection with the movable valve seat, and the pressure reducing hole is positioned on the movable valve plate.
In some embodiments: the bottom of moving the valve block is equipped with the bush, the bush is located and moves the disk seat and with moving disk seat fixed connection, the material of moving valve block and bush is carbide material.
In some embodiments: an anti-falling rod is connected between the movable valve seat and the screw rotor, and a transition through hole communicated with the pressure reducing hole and the central through hole is formed in the anti-falling rod;
the top of the anti-falling rod is in threaded connection with the movable valve seat, and the bottom of the anti-falling rod is in threaded connection with the screw rotor.
In some embodiments: the anti-falling valve is characterized in that a limiting ring is arranged in the shell, the anti-falling rod is located in the limiting ring, the outer wall of the movable valve seat is provided with a limiting plate with the diameter larger than the inner diameter of the limiting ring, the outer wall of the movable valve seat is further provided with a hexagonal head, and the hexagonal head is located at the top of the limiting plate.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a torsion pulse screw drill tool, which is provided with a screw drill tool and comprises a shell and a screw rotor rotationally connected in the shell, wherein a central through hole is formed in the screw rotor along the axial direction of the screw rotor; the pulse valve comprises a fixed valve and a movable valve which are arranged in the shell and positioned at the top of the screw rotor, and the movable valve is positioned at the bottom of the fixed valve and is mutually abutted against the fixed valve; the fixed valve is fixedly connected with the shell in the circumferential direction, the fixed valve is of a hollow pipe body structure with an opening at the top, an eccentric hole is formed in the bottom of the fixed valve, and a shunting hole is formed in the side wall of the fixed valve; the movable valve is provided with a pressure reducing hole communicated with the central through hole of the screw rotor, and the movable valve rotates along with the screw rotor so as to enable the pressure reducing hole to be communicated with the eccentric hole.
Therefore, the torsion pulse screw drill of the application is provided with the pulse valve in the shell of the screw drill, the pulse valve is positioned at the top of the screw rotor, and the pulse valve enables the pulse valve to periodically change the flow of drilling fluid flowing between the shell and the screw rotor and the flow of drilling fluid flowing through the central through hole of the screw rotor through the eccentric rotation motion of the screw rotor. The pulse valve enables the rotating speed of the screw rotor to change periodically, and the 'suddenly large and suddenly small' rotating speed can provide circumferential rotating acceleration for the drill bit, improve the rock breaking torque of the drill bit, and eliminate stick-slip vibration and motor braking of the drill bit in the drilling process.
In addition, the pulse valve can generate pulse pressure above the screw rotor by changing the flow area between the pressure reducing hole of the movable valve and the eccentric hole of the fixed valve and changing periodically, and the pulse pressure can provide the effect of an axial impact hammer for the drill bit, so that the rock breaking efficiency of the drill bit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
fig. 2 is an enlarged view of a portion a of fig. 1.
1. A screw drill; 2. a pulse valve; 3. the anti-dropping rod; 11. a housing; 12. a screw rotor; 13. a central through hole; 14. a screw; 15. a limiting ring; 31. a transition through hole;
21. valve fixing; 22. a valve; 211. a valve seat is fixed; 212. a fixed valve plate; 213. an eccentric hole; 214. a shunt hole; 215. a tapered hole; 216. an annular channel; 217. positioning a groove; 218. a seal ring;
221. a movable valve seat; 222. a movable valve plate; 223. a pressure relief vent; 224. a bushing; 225. and a limiting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a torsion pulse screw drilling tool, which can solve the problems that in the operation process of the screw drilling tool in the related technology, the phenomena of stick-slip vibration and motor braking of a drill bit can occur, the drilling footage is reduced, the instrument signal is unstable, and the drilling efficiency is reduced.
Referring to fig. 1 and 2, an embodiment of the present application provides a torsional pulse screw drill, including:
the screw drill 1 comprises a shell 11 and a screw rotor 12 which is rotatably connected in the shell 11, wherein the shell 11 is of a hollow pipe structure, the shell 11 of the embodiment comprises a drop-proof shell and a motor shell, and the drop-proof shell is positioned at the top of the motor shell and is connected through a screw thread. The screw rotor 12 is located in the motor housing, and a central through hole 13 is formed in the screw rotor 12 along the axial direction of the screw rotor 12.
The pulse valve 2 comprises a fixed valve 21 and a movable valve 22 which are arranged in the anti-falling shell and positioned at the top of the screw rotor 12, and the movable valve 22 is positioned at the bottom of the fixed valve 21 and is mutually butted with the fixed valve 21.
The fixed valve 21 is fixedly connected with the circumference of the anti-drop shell to prevent the fixed valve 21 from rotating in the anti-drop shell. The fixed valve 21 is a hollow pipe structure with an open top, the bottom of the fixed valve 21 is provided with an eccentric hole 213, the eccentric hole 213 ensures that the flow of drilling fluid entering the central through hole 13 of the screw rotor 12 realizes size change in a working period of the screw rotor 12 rotating around the motor shell, and the offset distance is related to the aperture of the eccentric hole 213 and the aperture of the pressure reducing hole 223 and related to the eccentric distance between the screw rotor 12 and the motor shell. The offset distance of the eccentric hole 213 in this embodiment is designed on the principle that the minimum flow rate of the drilling fluid into the central through hole 13 of the screw rotor 12 is zero in one period.
The side wall of the fixed valve 21 is provided with a plurality of diversion holes 214, and the diversion holes 214 are uniformly distributed and arranged along the circumference of the fixed valve 21. Decide valve 21 and set up to open-top's hollow pipe body structure, seted up a plurality of reposition of redundant personnel holes 214 on the lateral wall of deciding valve 21, increased the flow area of drilling fluid, but the more large-traffic drilling fluid of circulation improves the output torque of screw rod drilling tool.
The movable valve 22 is provided with a pressure reducing hole 223 communicating with the central through hole 13 of the screw rotor 12, and the movable valve 22 rotates following the screw rotor 12 to communicate the pressure reducing hole 223 with the eccentric hole 213. The movable valve 22 changes the torque of the screw rotor 12 and the drill by eccentrically rotating following the screw rotor 12 to periodically open and close the relief hole 223 and the eccentric hole 213.
The torsion pulse screw drill of the embodiment of the application is provided with the pulse valve 2 in the shell 11 of the screw drill 1, the pulse valve 2 is positioned at the top of the screw rotor 12, and the pulse valve 2 enables the pulse valve 2 to periodically change the flow of drilling fluid flowing between the shell 11 and the screw rotor 12 and the flow of drilling fluid flowing through the central through hole 13 of the screw rotor 12 through the eccentric rotation motion of the screw rotor 12.
When the pressure reducing hole 223 of the pulse valve 2 is disconnected from the eccentric hole 213, the flow area between the pressure reducing hole 223 of the movable valve 22 and the eccentric hole 213 of the fixed valve 21 is zero. All drilling fluid flows between the housing 11 and the screw rotor 12 and is all converted into rotational torque of the screw rotor 12.
When the pressure reducing hole 223 of the pulse valve 2 communicates with the eccentric hole 213, a part of the drilling fluid flows between the housing 11 and the screw rotor 12 and is converted into the rotational torque of the screw rotor 12, and the other part of the drilling fluid flows through the central through hole 13 of the screw rotor 12 and then joins the drilling fluid between the housing 11 and the screw rotor 12 from the lower end of the central through hole 13 of the screw rotor 12, thereby reducing the rotational speed and the rotational torque of the screw rotor 12.
Therefore, the pulse valve 2 enables the rotating speed and the torque of the screw rotor 12 to change periodically, and the rotating speed and the torque which are 'suddenly large and small' can provide circumferential rotating acceleration for the drill bit, improve the rock breaking torque of the drill bit and eliminate the stick-slip vibration and the motor brake of the drill bit in the drilling process.
The pulse valve 2 can also change the flow area between the pressure reducing hole 223 of the movable valve 22 and the eccentric hole 213 of the fixed valve 21 periodically, when the pressure reducing hole 223 of the pulse valve 2 is gradually disconnected with the eccentric hole 213, the drilling fluid entering the eccentric hole 213 can generate pulse pressure above the screw rotor 12, and the pulse pressure can provide an axial impact hammer effect for a drill bit, so that the rock breaking efficiency of the drill bit is improved.
In some alternative embodiments: referring to fig. 1 and 2, the present embodiment provides a torsion pulse screw drill, in which a fixed valve 21 of the torsion pulse screw drill includes a fixed valve seat 211 and a fixed valve plate 212 circumferentially fixed at the bottom of the fixed valve seat 211, the fixed valve plate 212 is a cylindrical structure, and an eccentric hole 213 is located on the fixed valve plate 212.
The top of the fixed valve plate 212 is provided with a tapered hole 215 communicated with the eccentric hole 213, the tapered hole 215 is of a structure with a large upper part and a small lower part, and the small end of the tapered hole 215 is communicated with the eccentric hole 213 of the fixed valve plate 212. The purpose of the tapered bore 215 is to improve the flow field of fluid flowing through the stationary seat 211, preventing erosion and cavitation of the stationary seat 211.
The fixed valve plate 212 is in interference fit connection with the fixed valve seat 211 through hot fitting, the interference is 0-0.2mm, and the fixed valve plate 212 and the fixed valve seat 211 are used for preventing the fixed valve plate 212 and the fixed valve seat 211 from loosening and preventing drilling fluid from entering a matching surface between the fixed valve plate 212 and the fixed valve seat 211 to generate erosion and leakage. The fixed valve plate 212 is preferably made of hard alloy materials, so that the structural strength between the fixed valve plate 212 and the movable valve plate 222 is improved, and the wear resistance and the erosion resistance are improved.
In some alternative embodiments: referring to fig. 1 and 2, an embodiment of the present application provides a torsion pulse screw drill, in which a fixed valve seat 211 of the torsion pulse screw drill is a hollow pipe structure and is circumferentially and fixedly connected with an anti-drop shell, the fixed valve seat 211 is composed of an upper pipe body and a lower pipe body, the upper pipe body and the lower pipe body are integrally formed, and the upper pipe body is circumferentially and fixedly and hermetically connected with an inner wall of the anti-drop shell.
A plurality of locating grooves 217 are formed in the outer wall of the upper pipe body along the circumferential direction of the upper pipe body, and the locating grooves 217 are long grooves and extend along the axis direction of the upper pipe body. The outer wall of the anti-falling shell is provided with a plurality of radial threaded holes, and the threaded holes are internally threaded with screws 14 connected with the positioning grooves 217. By providing the screw hole on the anti-drop housing, the screw 14 can be inserted into the positioning slot 217 through the screw hole, so as to prevent the positioning valve seat 211 from rotating relative to the anti-drop housing.
The positioning slot 217 is an elongated slot and extends along the axial direction of the upper tube body, and the positioning seat 211 can move axially in the drop-proof housing. When the fixed valve plate 212 and the movable valve plate 222 are worn, the fixed valve seat 211 moves downward along the length direction of the positioning groove 217 under the action of gravity of the fixed valve seat 211, and the fixed valve plate 212 and the movable valve plate 222 are guaranteed to be in a collision state all the time.
The outer diameter of the lower pipe body is smaller than the inner diameter of the anti-drop housing so that an annular channel 216 is formed between the lower pipe body and the anti-drop housing, and the diversion hole 214 is located on the lower pipe body and communicated with the annular channel 216. The drilling fluid enters from the top opening of the fixed valve seat 211 and then flows out of the diversion holes 214, the drilling fluid flows out of the diversion holes 214 and then enters the annular channel 216, and the drilling fluid in the annular channel 216 flows between the anti-falling shell and the screw rotor 12 and is converted into the rotating torque of the screw rotor 12.
In some alternative embodiments: referring to fig. 1 and 2, in the embodiment of the present invention, a plurality of sealing rings 218 are disposed between an outer wall of an upper pipe body of a fixed valve seat 211 of the torsion pulse screw drilling tool and an inner wall of an anti-drop casing, and the plurality of sealing rings 218 are arranged at intervals along an axial direction of the anti-drop casing to prevent drilling fluid from entering a gap between the upper pipe body and the anti-drop casing. At least two sealing rings 218 of the plurality of sealing rings 218 are positioned at the upper side and the lower side of the positioning groove 217, so that the drilling fluid is prevented from leaking from the threaded hole formed in the anti-drop shell.
In some alternative embodiments: referring to fig. 1 and 2, the embodiment of the present application provides a torsion pulse screw drill, in which the movable valve 22 of the torsion pulse screw drill includes a movable valve seat 221 and a movable valve plate 222 located at the top of the movable valve seat 221, the movable valve plate 222 is a cylindrical structure, and a pressure relief hole 223 is located on the movable valve plate 222.
The movable valve seat 221 is of a hollow pipe structure, the movable valve sheet 222 is connected with the movable valve seat 221 in a hot-pressing interference mode, the interference magnitude is 0-0.2mm, the movable valve sheet 222 and the movable valve seat 221 are prevented from loosening, and drilling fluid is prevented from entering a matching surface between the movable valve sheet 222 and the movable valve seat 221 to generate erosion and leakage.
The bottom of the movable valve plate 222 is provided with a bushing 224, the bushing 224 is located in the movable valve seat 221 and is fixedly connected with the movable valve seat 221, and the movable valve plate 222 and the bushing 224 are both made of hard alloy materials. The bushing 224 is used for preventing drilling fluid entering the movable valve plate 222 from eroding an inner hole of the movable valve seat 221, and the movable valve plate 222 is made of hard alloy materials and used for improving the structural strength between the movable valve plate 222 and the fixed valve plate 212 and improving the wear resistance and the erosion resistance.
In some alternative embodiments: referring to fig. 1 and 2, the embodiment of the present invention provides a torsion pulse screw drill, wherein a drop-proof rod 3 is connected between a movable valve seat 221 and a screw rotor 12 of the torsion pulse screw drill, and a transition through hole 31 communicated with a pressure reducing hole 223 and a central through hole 13 is formed in the drop-proof rod 3. The drilling fluid flowing out of the pressure reducing holes 223 flows through the central through hole 13 after entering the transition through holes 31.
The outer wall of the movable valve seat 221 is provided with an external thread connected with the top thread of the anti-falling rod 3, the top of the anti-falling rod 3 is connected with the movable valve seat 221 in a threaded manner, the top of the screw rotor 12 is provided with an internal thread connected with the bottom thread of the anti-falling rod 3, and the bottom of the anti-falling rod 3 is connected with the screw rotor in a threaded manner.
Be equipped with spacing ring 15 in preventing falling the casing, prevent that falling pole 3 is located in the spacing ring, be equipped with the limiting plate 225 that the diameter is greater than 15 internal diameters of spacing ring at the outer wall that moves valve seat 221, prevent the well when casing 11 fracture or dropout to make the pump pressure rise and make the ground in time discover the problem and avoid causing the accident. The outer wall of the movable valve seat 221 is further provided with a hexagonal head, and the hexagonal head is located at the top of the limiting plate 225, so that the movable valve seat 221 and the anti-falling rod 3 can be conveniently mounted and dismounted.
Principle of operation
The embodiment of the application provides a torsion pulse screw drill, and the torsion pulse screw drill is provided with a screw drill 1 which comprises a shell 11 and a screw rotor 12 rotationally connected in the shell 11, wherein a central through hole 13 is formed in the screw rotor 12 along the axial direction of the screw rotor 12; the pulse valve 2 comprises a fixed valve 21 and a movable valve 22 which are arranged in the shell 11 and positioned at the top of the screw rotor 12, and the movable valve 22 is positioned at the bottom of the fixed valve 21 and is mutually abutted against the fixed valve 21; the fixed valve 21 is circumferentially and fixedly connected with the shell 11, the fixed valve 21 is a hollow pipe structure with an open top, the bottom of the fixed valve 21 is provided with an eccentric hole 213, and the side wall of the fixed valve 21 is provided with a diversion hole 214; the movable valve 22 is provided with a pressure reducing hole 223 communicating with the central through hole 13 of the screw rotor 12, and the movable valve 22 rotates following the screw rotor 12 to communicate the pressure reducing hole 223 with the eccentric hole 213.
Therefore, the torsion pulse screw drill of the present application is provided with the pulse valve 2 in the housing 11 of the screw drill 1, the pulse valve 2 is located at the top of the screw rotor 12, and the pulse valve 2 makes the pulse valve 2 periodically change the flow rate of the drilling fluid flowing between the housing 11 and the screw rotor 12 and the flow rate flowing through the central through hole 13 of the screw rotor 12 through the eccentric rotation motion of the screw rotor 12. The pulse valve 2 enables the rotating speed of the screw rotor 12 to change periodically, and the 'suddenly small' rotating speed can provide circumferential rotating acceleration for the drill bit, improve the rock breaking torque of the drill bit, and eliminate stick-slip vibration and motor braking of the drill bit in the drilling process.
In addition, the pulse valve 2 generates pulse pressure above the screw rotor 12 by changing the flow area between the pressure reducing hole 223 of the movable valve 22 and the eccentric hole 213 of the fixed valve 21 periodically, and the pulse pressure can provide an axial impact hammer effect for the drill bit, thereby improving the rock breaking efficiency of the drill bit.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A torsional pulse screw drill, comprising:
the screw drill (1) comprises a shell (11) and a screw rotor (12) which is rotatably connected in the shell (11), wherein a central through hole (13) is formed in the screw rotor (12) along the axial direction of the screw rotor (12);
the pulse valve (2) comprises a fixed valve (21) and a movable valve (22), the fixed valve (21) and the movable valve (22) are both arranged in the shell (11) and positioned at the top of the screw rotor (12), and the movable valve (22) is positioned at the bottom of the fixed valve (21) and is mutually abutted against the fixed valve (21);
the fixed valve (21) is fixedly connected with the shell (11) in the circumferential direction, the fixed valve (21) is of a hollow pipe body structure with an open top, an eccentric hole (213) is formed in the bottom of the fixed valve (21), and a shunt hole (214) is formed in the side wall of the fixed valve (21);
the movable valve (22) is provided with a pressure reducing hole (223) communicated with the central through hole (13) of the screw rotor (12), and the movable valve (22) rotates along with the screw rotor (12) to enable the pressure reducing hole (223) to be communicated with the eccentric hole (213).
2. A torsional pulse screw drill as claimed in claim 1, wherein:
decide valve (21) including deciding valve seat (211) and fixing decide valve block (212) of deciding valve seat (211) bottom, decide valve seat (211) for hollow pipe body structure and with casing (11) circumference fixed connection, eccentric orfice (213) are located on deciding valve block (212).
3. A torsional pulse screw drill as claimed in claim 2, wherein:
the fixed valve seat (211) consists of an upper pipe body and a lower pipe body, and the upper pipe body is circumferentially fixed and hermetically connected with the inner wall of the shell (11);
the outer diameter of the lower pipe body is smaller than the inner diameter of the shell (11) so that an annular channel (216) is formed between the lower pipe body and the shell (11), and the shunting holes (214) are located on the lower pipe body and communicated with the annular channel (216).
4. A torsional pulse screw drill as claimed in claim 3, wherein:
a plurality of constant head tanks (217) have been seted up along the circumferencial direction of last body to the outer wall of going up the body, constant head tank (217) are microscler groove and extend along the axis direction of going up the body, a plurality of radial screw holes have been seted up on casing (11) outer wall, screw hole female connection have with screw (14) that constant head tank (217) are connected.
5. A torsional pulse screw drill as claimed in claim 3, wherein:
go up the outer wall of body with be equipped with multichannel sealing washer (218) between the inner wall of casing (11), multichannel sealing washer (218) are along the axis direction interval arrangement of casing (11).
6. A torsional pulse screw drill as claimed in claim 2, wherein:
the top of fixed valve piece (212) be equipped with communicating bell mouth (215) of eccentric orfice (213), fixed valve piece (212) with fixed valve seat (211) interference fit connects, the material of fixed valve piece (212) is the carbide material.
7. A torsional pulse screw drill as claimed in claim 1, wherein:
the movable valve (22) comprises a movable valve seat (221) and a movable valve plate (222) located at the top of the movable valve seat (221), the movable valve seat (221) is of a hollow pipe structure, the movable valve plate (222) is in interference connection with the movable valve seat (221), and the pressure reducing hole (223) is located on the movable valve plate (222).
8. A torsional pulse screw drill as claimed in claim 7, wherein:
the bottom of the movable valve plate (222) is provided with a lining (224), the lining (224) is positioned in the movable valve seat (221) and fixedly connected with the movable valve seat (221), and the movable valve plate (222) and the lining (224) are made of hard alloy materials.
9. A torsional pulse screw drill as claimed in claim 7, wherein:
an anti-falling rod (3) is connected between the movable valve seat (221) and the screw rotor (12), and a transition through hole (31) communicated with the pressure reducing hole (223) and the central through hole (13) is formed in the anti-falling rod (3);
the top of the anti-falling rod (3) is in threaded connection with the movable valve seat (221), and the bottom of the anti-falling rod (3) is in threaded connection with the screw rotor (12).
10. A torsional pulse screw drill as claimed in claim 9, wherein:
be equipped with spacing ring (15) in casing (11), prevent falling pole (3) and be located in spacing ring (15), the outer wall that moves disk seat (221) is equipped with the diameter and is greater than limiting plate (225) of spacing ring (15) internal diameter, the outer wall that moves disk seat (221) still is equipped with the hexagonal head, the hexagonal head is located the top of limiting plate (225).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023336954.XU CN214997415U (en) | 2020-12-31 | 2020-12-31 | Torsion pulse screw drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023336954.XU CN214997415U (en) | 2020-12-31 | 2020-12-31 | Torsion pulse screw drilling tool |
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| Publication Number | Publication Date |
|---|---|
| CN214997415U true CN214997415U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023336954.XU Active CN214997415U (en) | 2020-12-31 | 2020-12-31 | Torsion pulse screw drilling tool |
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| CN (1) | CN214997415U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115628025A (en) * | 2022-12-21 | 2023-01-20 | 中国石油集团川庆钻探工程有限公司 | Downhole tractor and coiled tubing tool |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115628025A (en) * | 2022-12-21 | 2023-01-20 | 中国石油集团川庆钻探工程有限公司 | Downhole tractor and coiled tubing tool |
| CN115628025B (en) * | 2022-12-21 | 2023-08-18 | 中国石油集团川庆钻探工程有限公司 | Downhole tractor and coiled tubing tool |
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