CN116201472A - Multi-stage oscillating screw drilling tool and operation method thereof - Google Patents
Multi-stage oscillating screw drilling tool and operation method thereof Download PDFInfo
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- CN116201472A CN116201472A CN202210764070.9A CN202210764070A CN116201472A CN 116201472 A CN116201472 A CN 116201472A CN 202210764070 A CN202210764070 A CN 202210764070A CN 116201472 A CN116201472 A CN 116201472A
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- 238000005553 drilling Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000003068 static effect Effects 0.000 claims description 23
- 230000000737 periodic effect Effects 0.000 claims description 22
- 238000002955 isolation Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 239000003345 natural gas Substances 0.000 abstract 1
- 239000003209 petroleum derivative Substances 0.000 abstract 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 12
- 235000017491 Bambusa tulda Nutrition 0.000 description 12
- 241001330002 Bambuseae Species 0.000 description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 12
- 239000011425 bamboo Substances 0.000 description 12
- 210000002445 nipple Anatomy 0.000 description 10
- 239000011435 rock Substances 0.000 description 10
- 235000014676 Phragmites communis Nutrition 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a multistage oscillation screw drilling tool and an operation method thereof, belonging to the technical field of petroleum and natural gas drilling. Meanwhile, the invention also discloses an operation method of the multistage oscillating screw drilling tool. The technical scheme of the invention has the characteristics of high safety performance and long service life, and is suitable for popularization and application.
Description
Technical Field
The invention belongs to the technical field of oil and gas drilling, and relates to a multi-stage oscillating screw drilling tool and an operation method thereof.
Background
Along with the continuous increase of the demand of oil and gas resources, drilling is advanced towards deeper stratum, the hardness of rock in drilling is high, the abrasive property is strong, the drillability extremum is high, and in directional wells, horizontal wells and large displacement wells, the phenomenon of pressure supporting, sticking and the like easily occurs to a drill string due to overlarge friction resistance, so that the drilling pressure and torque cannot be truly and effectively applied to the drill bit, the mechanical drilling speed and the oil and gas exploration development speed are reduced, the drilling period and the drilling cost are increased, and the development of the horizontal wells and the large displacement wells is seriously restricted. In order to reduce the drilling cost and solve the problems of pressure supporting, sticking and the like, many institutions and scholars at home and abroad conduct intensive research on the drilling cost.
The rotary drilling technique is a drilling method combining rotation and impact on the basis of conventional rotary drilling, and the principle is that an impactor is arranged on a drill bit, and in the drilling process, high-frequency impact force generated by driving the impactor by drilling fluid is continuously applied to the drill bit, so that the rotary drilling is realized while the impact drilling is realized. The rotary drilling technique better utilizes the characteristics of high brittleness of hard rock, lower shear strength and no impact resistance, thereby achieving the purpose of improving the mechanical drilling speed. However, the rotary impact drilling technology needs to consume energy of drilling fluid and convert the energy into bit impact energy, and especially, as the well depth is deepened, the energy of rock breaking and carrying drilling fluid is insufficient, so that rock fragments are repeatedly cut, and the mechanical drilling speed is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a multi-stage oscillating screw drilling tool and an operation method thereof, wherein the tool combines the screw drilling tool with multi-stage oscillation, so that the drilling capability and the service life of the drilling tool are improved more effectively. The invention has great practical significance for improving the drilling speed of deep wells, ultra-deep wells and wells with complex structures, and reducing the drilling cost.
The multistage oscillation screw drilling tool comprises a screw drilling tool body and a multistage oscillation assembly, wherein the screw drilling tool body comprises a transmission shaft assembly, a universal shaft assembly, a motor assembly and a bypass valve assembly, the bypass valve assembly is used for controlling the flow direction of drilling fluid, the multistage oscillation assembly and the motor assembly are arranged below the bypass valve assembly, the multistage oscillation assembly is arranged above the motor assembly, the bottom of the motor assembly is connected with the transmission shaft assembly through the universal shaft assembly, the motor assembly is used for converting the hydraulic energy of the drilling fluid into mechanical energy for driving the multistage oscillation assembly to work, the transmission shaft assembly downwards transmits torque and rotation speed, and the multistage oscillation assembly downwards transmits axial oscillation load. The invention combines the screw drilling tool with the multi-stage oscillation, thereby more effectively improving the drilling capability and prolonging the service life of the drilling tool.
In order to achieve the above technical object, an embodiment of the present invention is achieved as follows:
in one aspect, embodiments of the present invention provide a multi-stage oscillating screw drilling tool, including a screw drilling tool body and a multi-stage oscillating assembly, the screw drilling tool body includes a bypass valve assembly, a motor assembly, a cardan shaft assembly and a transmission shaft assembly, the bypass valve assembly is used for controlling the flow direction of drilling fluid, the multi-stage oscillating assembly and the motor assembly are arranged below the bypass valve assembly, the multi-stage oscillating assembly is located above the motor assembly, the bottom of the motor assembly is connected with the transmission shaft assembly through the cardan shaft assembly, the motor assembly is used for converting the hydraulic energy of the drilling fluid into mechanical energy for driving the multi-stage oscillating assembly to work, the transmission shaft assembly transmits torque and rotation speed downwards, and the multi-stage oscillating assembly axially reciprocates and transmits vibration to a drill string connected with two ends of the multi-stage oscillating screw drilling tool.
Still further, multistage vibration assembly is including the vibration dabber that can follow the reciprocal vibration of axial, the inside of vibration dabber is provided with the middle runner that the axial is link up, the outside of vibration dabber is gone up the position department and is provided with axial evenly distributed's spline structure, the bottom of vibration dabber is provided with the radial through groove of circumference evenly distributed, transmission shell and dish reed section of thick bamboo are established to the outside cover of vibration dabber, the inside of transmission shell is provided with the spline structure of circumference evenly distributed, the inside of dish reed section of thick bamboo is provided with the ladder, the position that goes up between dish reed section of thick bamboo and the vibration dabber sets up the dish spring, the dish spring cover is established on the vibration dabber and is supported on the ladder of dish reed section of thick bamboo inside, the position that goes down between dish reed section of thick bamboo and the vibration dabber sets up piston, keep apart piston and lower piston respectively, go up piston, keep apart piston and lower piston all cover and establish on the vibration dabber, the annular space intercommunication between radial through groove and the last piston and the keep apart piston of dabber, the annular space constitutes first cavity, go up the sleeve between the dish spring, sleeve is established on the vibration dabber.
Still further, upper end and lower extreme of oscillating mandrel all set up the screw thread, carry out threaded connection with last piston and lower piston contact department, the outside of going up the piston and the outside of lower piston and the inside contact department of dish spring section of thick bamboo set up the sealing washer, keep apart outside of piston and oscillating mandrel, the inside contact department of dish spring section of thick bamboo two positions set up the sealing washer.
Still further, the lower extreme of dish spring section of thick bamboo sets up radial through-hole, and the isolation piston is fixed with dish spring section of thick bamboo by the pin that passes dish spring section of thick bamboo through-hole, and dish spring section of thick bamboo sets up circumference evenly distributed's radial through-hole in the position department between isolation piston and lower piston, and the annular space between isolation piston and the lower piston constitutes the second cavity, and the second cavity is linked together with the wall of a well annular space in dish spring section of thick bamboo outside.
Still further, the top of vibration dabber and bypass valve assembly's below junction adopts threaded connection, and the inside of drive shell and the outside contact position department of vibration dabber set up first sealedly, and the inside of drive shell and the outside of vibration dabber all have spline structure and connect through spline structure, and the below of drive shell adopts threaded connection with the top junction of dish reed, and the below of dish reed adopts threaded connection with the top junction of valve body shell.
Still further, the valve body shell is arranged on the static valve and the movable valve in a sleeved mode, is in threaded connection with the lower portion of the disc spring barrel and the upper portion of the motor assembly, the lower end face of the static valve and the upper end face of the movable valve are propped against each other, drilling fluid flow channels are formed in the static valve and the movable valve, movable valve outlets which are evenly distributed in the circumferential direction are formed in the movable valve, through holes are communicated with the drilling fluid flow channels, the lower portion of the movable valve is connected with the motor assembly, and a third cavity is formed between the upper end of the static valve and the bottom of the oscillating mandrel. The drilling fluid flows through the motor assembly, the motor assembly rotates with the movable valve connected with the motor assembly, the overflowing area between the movable valve and the static valve is periodically changed, so that periodic pressure pulses are generated, the pressure pulses transmitted axially periodically change the pressure in the first cavity and the third cavity, the periodic pressure in the first cavity and the periodic pressure in the third cavity respectively act on the lower end faces of the upper piston and the lower piston, the oscillating mandrel is caused to axially reciprocate, and the drill string connected with the two ends of the multi-stage oscillating screw drilling tool is caused to axially reciprocate.
In another aspect, embodiments of the present invention provide a method of operating a multi-stage oscillating screw drilling tool, comprising the steps of:
step 1, drilling fluid flows into an intermediate runner of an oscillating mandrel through a bypass valve assembly and flows out through a third cavity and a driven valve outlet of a drilling fluid runner;
and 4, under the action of two parts of periodic pressure, the oscillating mandrel can generate axial vibration displacement, and the vibration displacement is transmitted to the disc spring through the sleeve, so that the disc spring is continuously subjected to the periodic pressure, and meanwhile, the disc spring is reacted to the oscillating mandrel to cause the axial vibration of the oscillating mandrel.
The embodiment of the invention has the beneficial effects that:
the technical scheme of the invention perfectly combines the screw hydraulic oscillator and the screw drilling tool, and has the advantages of the screw hydraulic oscillator and the screw drilling tool. The screw hydraulic oscillator consists of an oscillation nipple, a power nipple and a disc valve nipple, wherein the oscillation nipple adopts a two-stage piston, the power nipple can convert the hydraulic energy of drilling fluid into the kinetic energy of the disc valve nipple, the two valve holes of the disc valve nipple are periodically overlapped and staggered, the flow passing area of the disc valve nipple is continuously changed periodically, so that periodic pressure pulses are generated, the pressure pulses are axially transmitted to the two pistons of the oscillation nipple along the inside of a tool and act on the pistons, the oscillation nipple generates axial reciprocating vibration, drill strings at two ends are driven to periodically vibrate axially, the static friction force between the drill strings and wall rocks is converted into dynamic friction force, and the friction resistance is reduced. The screw drilling tool comprises a bypass valve assembly, a motor assembly, a universal shaft assembly and a transmission shaft assembly, and is used for transmitting rotating speed and torque and increasing the rock breaking efficiency of the drill bit. The multistage oscillation screw drilling tool has the advantages of a screw hydraulic oscillator and the screw drilling tool, can drive drill columns at two ends to axially reciprocate to vibrate, reduces friction resistance of the drill columns at the near drilling position, reduces the problems of pressure supporting, sticking and the like, provides more uniform, stable, real and effective weight on bit for the drill bit, obviously improves rock breaking efficiency and mechanical drilling speed, and reduces drilling period and drilling cost. The invention has great practical significance for improving the drilling speed of deep wells, ultra-deep wells and wells with complex structures, and reducing the drilling cost.
In summary, in the multistage oscillating screw drilling tool, drilling fluid is taken as a medium, and the flow of the flowing drilling fluid is periodically changed through the rotation of the movable valve, so that the oscillating mandrel axially vibrates, the problems of large friction of a near drill bit and low rock breaking efficiency in the prior art can be well solved, the possibility of underground accidents is greatly reduced, the service life of the drill bit can be prolonged, and the drilling cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of a multi-stage oscillating screw drilling tool of the present invention.
Fig. 2 is a schematic diagram of a multi-stage oscillating assembly of the present invention.
In the figure:
100. a multi-stage oscillating screw drilling tool;
101. a bypass valve; 102. a multistage oscillation assembly; 103. a motor assembly; 104. a universal shaft assembly; 105. a drive shaft assembly;
1. oscillating the mandrel;
11. a first seal; 12. an intermediate flow passage; 13. radial penetration grooves; 14. a first cavity;
2. a transmission housing;
21. threaded connection;
3. a disc spring cylinder;
31. a disc spring; 32. a radial through hole; 33. a second cavity; 34. an upper piston; 35. an isolation piston; 36. a lower piston; 37. a second seal 38, a screw connection;
4. a sleeve;
5. a valve body housing;
51. a static valve; 52. a valve; 53. a valve outlet; 54. a drilling fluid flow passage; 55. and a third cavity.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 2, the present invention provides a multistage oscillating screw drilling tool 100, which comprises a screw drilling tool body and a multistage oscillating assembly 102, wherein the screw drilling tool body comprises a transmission shaft assembly 105, a cardan shaft assembly 104, a motor assembly 103 and a bypass valve assembly 101, the bypass valve assembly 101 is used for controlling the flow direction of drilling fluid, the multistage oscillating assembly and the motor assembly are arranged below the bypass valve assembly 101, the multistage oscillating assembly 102 is arranged above the motor assembly 103, the bottom of the motor assembly 103 is connected with the transmission shaft assembly 105 through the cardan shaft assembly 104, the motor assembly 103 is used for converting the hydraulic energy of drilling fluid into mechanical energy for driving the multistage oscillating assembly 102 to work, the transmission shaft assembly 105 downwards transmits torque and rotation speed, and the multistage oscillating assembly 102 downwards transmits axial oscillating load.
In the multistage oscillating screw drilling tool, the drilling fluid is used as a medium, the flow of the flowing drilling fluid is periodically changed through the rotation of the movable valve, so that the oscillating mandrel axially vibrates, the problems of large friction resistance and low rock breaking efficiency of a near drill bit in the prior art can be well solved, the possibility of underground accidents is greatly reduced, the service life of the drill bit can be prolonged, and the drilling cost is reduced.
As shown in fig. 2, the multistage oscillation assembly 102 includes an oscillation mandrel 1 capable of axially reciprocating, an intermediate runner 12 is provided on the oscillation mandrel 1, radial through grooves 13 are provided at the bottom of the oscillation mandrel 1, the transmission housing 2 and the disc spring 3 are sleeved outside the oscillation mandrel 1, a disc spring 31 is provided at an upward position between the disc spring 3 and the oscillation mandrel 1, an upper piston 34, an isolation piston 35 and a lower piston 36 are provided at a downward position between the disc spring 3 and the oscillation mandrel 1, the upper piston 34, the isolation piston 35 and the lower piston 36 are sleeved on the oscillation mandrel 1, the radial through grooves 13 are communicated with an annular space between the upper piston 34 and the isolation piston 35, the annular space forms a first cavity 14, a sleeve 4 is provided between the upper piston 34 and the disc spring 31, and the sleeve 4 is sleeved on the oscillation mandrel 1.
The upper end and the lower end of the oscillating mandrel 1 are provided with threads, the upper piston 34 and the lower piston 36 are in threaded connection, the contact position of the upper piston 34 and the lower piston 36 with the disc spring cylinder 3 is provided with a second seal 37, and the contact position of the isolating piston 35 with the oscillating mandrel 1 and the disc spring cylinder 3 is provided with a seal ring.
The lower end of the disc spring cylinder 3 is provided with circumferentially distributed through holes at the position of the isolation piston 35, the isolation piston 35 is fixed with the disc spring cylinder 3 by a pin penetrating through the through holes, the disc spring cylinder 3 is provided with axially uniformly distributed radial through holes 32 at the position between the isolation piston 35 and the lower piston 36, an annular space between the isolation piston 35 and the lower piston 36 forms a second cavity 33, and the second cavity 33 is communicated with a well wall annular space outside the disc spring cylinder 3.
The position of the upper end of the transmission shell 2, which is contacted with the oscillating mandrel 1, is provided with a first seal 11, the connection between the lower part of the transmission shell 2 and the upper part of the disc spring 3 is in threaded connection 21, and the connection between the lower part of the disc spring and the upper part of the valve body shell is in threaded connection.
The valve body shell 5 is sleeved on the static valve 51 and the movable valve 52, the static valve 51 and the movable valve 52 are in contact with each other, drilling fluid flow passages 54 are formed in the static valve 51 and the movable valve 52, circumferentially and uniformly distributed movable valve outlets 53 are formed in the movable valve 52, through holes are communicated with the drilling fluid flow passages 54, the lower part of the movable valve 52 is connected with the motor assembly 103, and a third cavity 55 is formed by a cavity between the static valve 51 and the bottom of the oscillating mandrel 1. When the drilling fluid passes through the drilling fluid flow passage 54, the movable valve 52 rotates around the static valve 51 while rotating, so that the flow rate of the drilling fluid passing through the movable valve 52 changes periodically, pressure fluctuation occurs in the first cavity 14 and the third cavity 55, the upper piston 34 and the lower piston 36 receive periodic pressure from the first cavity 14 and the third cavity 55 respectively, and the periodic pressure drives the oscillating mandrel 1 to vibrate axially.
In the present embodiment, the valve outlet 53 is disposed obliquely downward, and the oscillating mandrel 1 and the transmission case 2 are continuously pressed against and separated from each other due to continuous vibration.
When the multistage oscillation screw drilling tool 100 is used for drilling, drilling fluid flows into the middle runner 12 of the oscillation mandrel 1 through the bypass valve assembly 101 and flows out through the third cavity 55 and the driven valve outlet 53 of the drilling fluid runner 54; under the action of drilling fluid, the movable valve 52 rotates and revolves around the static valve 51; thereby causing a change in the flow area of the drilling fluid as it passes through the static valve 51 and the dynamic valve 52, thereby creating a periodic pressure; a first portion of the cyclic pressure acts on the lower piston 36 through the third chamber 55 and a second portion of the cyclic pressure acts on the upper piston 34 through the first chamber 14; since the lower piston 36 is in threaded connection with the oscillating mandrel 1, a first part of the pressure is transmitted to the oscillating mandrel 1 through the lower piston 36; the upper piston 34 is in threaded connection with the oscillating mandrel 1, so that the second partial pressure is transmitted to the oscillating mandrel 1 through the upper piston 34; under the action of the two parts of periodic pressure, the oscillating mandrel can generate axial vibration displacement, and the vibration displacement is transmitted to the disc spring 31 through the sleeve 4, so that the disc spring 31 is continuously subjected to the periodic pressure, and meanwhile, the disc spring 31 acts against the oscillating mandrel 1 to cause the axial vibration of the oscillating mandrel 1. Under the continuous vibration action of the multi-stage oscillating screw drilling tool 100, friction at the position close to the drill bit is reduced, and axial vibration force has a certain damage effect on rock at the position of the drill bit, so that the drilling speed and drilling capacity of the drilling tool are improved more effectively.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (7)
1. The utility model provides a multistage vibration screw drilling tool which characterized in that, including screw drilling tool body and multistage vibration assembly, screw drilling tool body includes bypass valve assembly, motor assembly, cardan shaft assembly and transmission shaft assembly, bypass valve assembly is used for controlling drilling fluid flow direction, the below of bypass valve assembly sets up multistage vibration assembly and motor assembly, multistage vibration assembly is located the top of motor assembly, the bottom of motor assembly is connected with the transmission shaft assembly through cardan shaft assembly, the motor assembly is used for converting the hydraulic energy of drilling fluid into the mechanical energy that drives multistage vibration assembly work, transmission shaft assembly downward transmission moment of torsion and rotational speed, multistage vibration assembly axial reciprocating vibration and with the vibration transmission to multistage vibration screw drilling tool both ends connect on the drilling string.
2. The multistage oscillating screw drilling tool according to claim 1, wherein the multistage oscillating assembly comprises an oscillating mandrel capable of axially oscillating in a reciprocating manner, an axially penetrating middle runner is arranged in the oscillating mandrel, axially evenly distributed spline structures are arranged at the position, which is above the outside of the oscillating mandrel, radial through grooves which are evenly distributed in the circumferential direction are formed in the bottom of the oscillating mandrel, a transmission shell and a disc spring cylinder are sleeved outside the oscillating mandrel, circumferentially evenly distributed spline structures are arranged in the transmission shell, steps are arranged in the disc spring cylinder, a disc spring is arranged at the position, which is above the oscillating mandrel, between the disc spring cylinder and the oscillating mandrel, a disc spring is sleeved on the oscillating mandrel and abuts against the steps in the disc spring cylinder, an upper piston, an isolating piston and a lower piston are respectively arranged at the position, which is below the oscillating mandrel, the radial through grooves of the oscillating mandrel are communicated with the annular space between the upper piston and the isolating piston, a first cavity is formed, a sleeve is arranged between the upper piston and the disc spring, and the sleeve is sleeved on the oscillating mandrel.
3. The multi-stage oscillating screw drilling tool of claim 2, wherein the upper end and the lower end of the oscillating mandrel are provided with threads, the threads are connected with the contact positions of the upper piston and the lower piston, the contact positions of the outer part of the upper piston and the outer part of the lower piston and the inner part of the disc spring barrel are provided with sealing rings, and the two positions of the contact positions of the isolating piston and the outer part of the oscillating mandrel and the inner part of the disc spring barrel are provided with sealing rings.
4. The multi-stage oscillating screw drilling tool of claim 3, wherein the lower end of the disc spring is provided with radial through holes, the isolation piston is fixed with the disc spring by pins penetrating through the through holes of the disc spring, the disc spring is provided with radial through holes which are uniformly distributed circumferentially at a position between the isolation piston and the lower piston, an annulus between the isolation piston and the lower piston forms a second cavity, and the second cavity is communicated with a well wall annulus outside the disc spring.
5. The multi-stage oscillating screw drilling tool of claim 4, wherein the junction of the upper side of the oscillating mandrel and the lower side of the bypass valve assembly is in threaded connection, a first seal is arranged at the contact position between the interior of the transmission shell and the exterior of the oscillating mandrel, the interior of the transmission shell and the exterior of the oscillating mandrel are both provided with spline structures and are connected through the spline structures, the junction of the lower side of the transmission shell and the upper side of the disc spring is in threaded connection, and the junction of the lower side of the disc spring and the upper side of the valve body shell is in threaded connection.
6. The multi-stage oscillating screw drilling tool according to claim 5, wherein the valve body shell is sleeved on the static valve and the movable valve and is in threaded connection with the lower part of the disc spring barrel and the upper part of the motor assembly, the lower end face of the static valve and the upper end face of the movable valve are mutually propped against each other, drilling fluid flow passages are arranged in the static valve and the movable valve, movable valve outlets which are uniformly distributed in the circumferential direction are arranged on the movable valve, the through holes are communicated with the drilling fluid flow passages, the lower part of the movable valve is connected with the motor assembly, and a cavity between the upper end of the static valve and the bottom of the oscillating mandrel forms a third cavity; the drilling fluid flows through the motor assembly, the motor assembly rotates with the movable valve connected with the motor assembly, the overflowing area between the movable valve and the static valve is periodically changed, so that periodic pressure pulses are generated, the pressure pulses transmitted axially periodically change the pressure in the first cavity and the third cavity, the periodic pressure in the first cavity and the periodic pressure in the third cavity respectively act on the lower end faces of the upper piston and the lower piston, the oscillating mandrel is caused to axially reciprocate, and the drill string connected with the two ends of the multi-stage oscillating screw drilling tool is caused to axially reciprocate.
7. A method of operating a multi-stage oscillating screw drilling tool according to any one of claims 1 to 6, comprising the steps of:
step 1, drilling fluid flows into an intermediate runner of an oscillating mandrel through a bypass valve assembly and flows out through a third cavity and a driven valve outlet of a drilling fluid runner;
step 2, under the action of drilling fluid, the movable valve rotates and revolves around the static valve; thereby causing the change of the flow area of the drilling fluid when passing through the static valve and the dynamic valve, and further forming periodic pressure;
step 3, the first part of periodic pressure acts on the lower piston through the third cavity, and the second part of periodic pressure acts on the upper piston through the first cavity; because the lower piston is in threaded connection with the oscillating mandrel, the first partial pressure is transmitted to the oscillating mandrel through the lower piston; the upper piston is in threaded connection with the oscillating mandrel, and the second partial pressure is transmitted to the oscillating mandrel through the upper piston;
and 4, under the action of two parts of periodic pressure, the oscillating mandrel can generate axial vibration displacement, and the vibration displacement is transmitted to the disc spring through the sleeve, so that the disc spring is continuously subjected to the periodic pressure, and meanwhile, the disc spring is reacted to the oscillating mandrel to cause the axial vibration of the oscillating mandrel.
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| CN202210764070.9A CN116201472A (en) | 2022-06-29 | 2022-06-29 | Multi-stage oscillating screw drilling tool and operation method thereof |
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| CN202210764070.9A CN116201472A (en) | 2022-06-29 | 2022-06-29 | Multi-stage oscillating screw drilling tool and operation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117328810A (en) * | 2023-10-30 | 2024-01-02 | 西南石油大学 | A multi-stage pulse oscillation screw |
| CN118835952A (en) * | 2024-07-30 | 2024-10-25 | 西南石油大学 | Ball throwing type hydraulic oscillator |
| CN118911592A (en) * | 2024-10-11 | 2024-11-08 | 潍坊盛德石油机械制造有限公司 | Screw drilling tool with multifunctional bypass valve |
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2022
- 2022-06-29 CN CN202210764070.9A patent/CN116201472A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117328810A (en) * | 2023-10-30 | 2024-01-02 | 西南石油大学 | A multi-stage pulse oscillation screw |
| CN118835952A (en) * | 2024-07-30 | 2024-10-25 | 西南石油大学 | Ball throwing type hydraulic oscillator |
| CN118911592A (en) * | 2024-10-11 | 2024-11-08 | 潍坊盛德石油机械制造有限公司 | Screw drilling tool with multifunctional bypass valve |
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