CN109505728B - Dynamic pushing type rotary motor - Google Patents
Dynamic pushing type rotary motor Download PDFInfo
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- CN109505728B CN109505728B CN201811622897.6A CN201811622897A CN109505728B CN 109505728 B CN109505728 B CN 109505728B CN 201811622897 A CN201811622897 A CN 201811622897A CN 109505728 B CN109505728 B CN 109505728B
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- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 43
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C2/00—Rotary-piston engines
- F03C2/22—Rotary-piston engines of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
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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
- E21B12/00—Accessories for drilling tools
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a dynamic pushing type rotary motor which is matched with a drill bit to be used, and can effectively improve the drilling rate by giving power to the drill bit near the drill bit, and can be used for various drilling processes such as deep drilling, vertical drilling, large-displacement horizontal wells and the like; the dynamic pushing type rotary motor comprises an outer tube, an upper joint, an upper support, an upper centralizing ring, a rotor assembly, a sealing rod, a stator, a flow distribution valve, a lower support ring, a lower support, a connecting shaft, a connecting sleeve, a lower joint and a main shaft, wherein the rotor assembly comprises a rotor main body and four rotor pushing blocks, and a reset block is arranged between the stator and the rotor assembly. All components of the dynamic pushing type rotary motor are metal components and high-temperature resistant components, and the dynamic pushing type rotary motor can be used in a high-temperature environment with the temperature of more than 250 ℃. The positive displacement fluid pressure transmission mechanism is used in the working process of the motor, so that the advantages of the screw motor are well inherited, and the service life of the motor is effectively prolonged because the rubber part is not used for sealing.
Description
Technical Field
The invention belongs to the field of drilling, and particularly relates to a dynamic pushing type rotary motor.
Background
At present, the exploration and development projects of deep mineral resources, geothermal energy, shale oil, shale gas, coalbed methane, natural gas hydrate and other unconventional oil and gas resources in China are increased year by year. Advanced drilling processes such as rope coring, vertical drilling, large-displacement horizontal well, butt well, underbalanced drilling and the like used in drilling have also been greatly developed. The underground power drilling tool is a core tool used in various drilling processes, and practice shows that the underground power drilling tool can enable a drill bit to obtain higher mechanical drilling speed so as to greatly reduce drilling cost.
In the prior art, there are two main types of downhole power drilling tools, namely a vane turbine drilling tool and a volumetric screw drilling tool. The turbine drilling tool mainly comprises a multistage turbine and a multistage thrust bearing which are connected in series, is of a building block structure, is large in general diameter, and is provided with a special speed reducer and other functional sections because of high rotating speed, so that the drilling tool structure is complicated. The bearing group has the defects that the bearing group is concentrated in bearing axial force, particularly the thrust bearing is seriously worn, and the turbine section rotor and the stator are easy to collide with each other to cause failure; in addition, because the turbine drilling tool has the characteristics of high rotating speed and low torque, in order to increase the torque in use, the number of stator and rotor is generally increased, the turbine drilling tool is lengthened or a plurality of turbine sections are combined, so that the length of the whole tool is increased, and the drilling process is negatively influenced. For positive displacement progressive cavity drilling tools, the core component is the progressive cavity motor, which is a positive displacement power machine driven by pressurized mud, having only two elements, a rotor and a stator. The rotor is a steel screw with surface coated with abrasion-resistant material, the stator is a steel pipe with inner wall vulcanized with rubber bushing, the structure requires the rotor and stator curved surface to form space conjugate seal, and a plurality of conjugate seal cavities are formed to contain working medium (slurry). The working characteristics are as follows: the hydraulic pump has the mechanical characteristics of being hard relative to the turbine drilling tool, the overload capacity is strong, the output of power and rotating speed is greatly influenced by the diameter of the drilling tool, the torque is larger, the rotating speed is lower, when the working pressure difference is exceeded, the pump pressure suddenly rises, and the drilling tool can be braked sharply. In addition, the rubber bushing between the stator and the rotor is easy to wear in the working process, so that the motor is lost and fails, the conventional rubber stator is usually resistant to the temperature of less than 120 ℃, and the service life of the screw motor is shorter in some special process blocks needing high temperature resistance.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a dynamic push-back type rotary motor, and a power drilling tool system which uses the pressure difference of working media between closed cavities as driving force is established by utilizing the working mechanism of positive displacement fluid pressure transmission, and the dynamic push-back type rotary motor has the mechanical characteristics of screw motor hardness, avoids the defect of short service life of the motor caused by using a rubber stator for the screw motor, has higher temperature resistance of a turbine motor, avoids the mechanical characteristics of soft turbine motor, does not need a speed reducer, and is simpler in structure than the turbine motor.
In order to achieve the above purpose, the dynamic pushing type rotary motor provided by the invention comprises an upper joint, an outer pipe, a main shaft connected with a drill bit, a rotor assembly, a sealing rod, a stator, a reset block and a flow distribution valve, wherein the upper joint, the outer pipe and the main shaft are sequentially connected;
The stator is sleeved in the outer tube, the upper part and the lower part of the stator are in contact with the inner surface of the outer tube, and an annulus is reserved between the outer surface of the middle section of the stator and the outer tube;
The stator is sleeved with the rotor assembly, the rotor assembly comprises a rotor main body and four rotor pushing blocks which are connected through a concentric shaft, the four rotor pushing blocks are uniformly distributed on the periphery of the rotor main body, the lengths of the rotor main body and the four rotor pushing blocks are the same, the rotor main body and the four rotor pushing blocks are arranged on the circumference of the rotor main body in an angle mode, a groove for accommodating the rotor pushing blocks is formed in the rotor main body, the groove is matched with the shape of the rotor pushing blocks, and a plurality of flow guide ports penetrating through the inner wall of the rotor main body are formed in the bottom of the groove; the sealing rod is arranged on the rotor pushing block, and the sealing rod enables four areas which are not communicated with each other to be formed between the rotor assembly and the stator;
a flow distribution valve is sleeved in the rotor assembly, the flow distribution valve is cylindrical with a central opening, and fluid flows through the flow distribution valve for flow distribution;
Two circular through holes which are symmetrical in center are formed in the inner wall of the stator, and each circular through hole is connected with one reset block through a screw; the stator is provided with symmetrical flow guiding ports at an angle of 45 degrees with the circular through hole, and the flow guiding ports enable fluid to flow from the flow distributing valve to an annular space between the stator and the outer tube.
Further, the stator assembly further comprises an upper support, wherein the upper support is annular and connected with the stator, the upper support is connected with the distributing valve, and the upper support abuts against the upper joint and the inner wall of the outer tube.
Preferably, the outer wall of the upper joint is provided with a trapezoid external thread, the inner wall of the outer tube is provided with a trapezoid internal thread, and the upper joint is in threaded connection with the outer tube; the upper support is connected with the stator through bolts; the inner wall of the upper support is provided with spline grooves, the upper part of the outer wall of the flow distribution valve is provided with a spline, and the flow distribution valve is connected with the upper support through the spline and the spline grooves.
Further, an upper centering ring is included, fixedly coupled to the rotor assembly, and in close proximity to the stator and the distribution valve.
Further, a connecting shaft is further included, an upper portion of which is connected to the rotor assembly, and a lower portion of which is connected to an upper portion of the main shaft.
Preferably, an upper portion of the connection shaft is connected to the rotor assembly by a flat key.
Preferably, the connecting shaft is annular, and the outer wall of the lower part of the connecting shaft is inserted into the inner wall of the main shaft for socket connection.
Further, the motor rotor comprises a rotor assembly and a connecting shaft, and further comprises a lower supporting ring which is annular and is respectively connected with the rotor assembly and the connecting shaft, and the outer wall of the lower supporting ring abuts against the stator.
Further, the device also comprises a lower support, a lower joint and a connecting sleeve, wherein the lower support, the lower joint and the connecting sleeve are annular, the upper part of the connecting sleeve is connected with the outer tube, the lower support is sleeved on the connecting shaft, the lower support is abutted against the lower part of the stator and the inner wall of the connecting sleeve, the lower joint is sleeved on the main shaft, and the lower joint is connected with the connecting sleeve.
The invention has the following beneficial effects:
1. All the components of the dynamic pushing type rotary motor are metal components and high-temperature resistant components, and the dynamic pushing type rotary motor can be used in a high-temperature environment with the temperature of more than 250 ℃;
2. The positive displacement fluid pressure transmission mechanism is utilized, the advantages of the screw motor are well inherited, and the service life of the motor is effectively prolonged because the rubber part is not used for sealing;
3. the underground power drilling tool series suitable for small, medium and large calibers can be developed, and the requirements of various drilling can be met;
4. the structure is simple, each component is relatively independent, the disassembly and the maintenance are convenient, and the corresponding optimization adjustment of the drilling tool structure is also convenient according to specific working conditions.
Drawings
Fig. 1 is a schematic structural view of a dynamic push-back rotary motor in an embodiment.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic structural view of a rotor body in the embodiment.
Fig. 4 is a schematic structural view of a rotor push block in the embodiment.
Fig. 5 is a schematic structural view of a stator in an embodiment.
Fig. 6 is a schematic structural diagram of a distributing valve in the embodiment.
In the figure:
1. the valve comprises an upper joint 2, an outer pipe 3, an upper support 31, a rotor main body 32, a rotor push block 4, an upper centralizing ring 5, a rotor assembly 6, a stator 7, a distributing valve 8, a lower support ring 9, a connecting shaft 10, a lower support 11, a connecting sleeve 12, a lower joint 13, a main shaft 14, a reset block 15 and a sealing rod.
Detailed Description
In order that those skilled in the art will better understand the present invention, the present invention will be described in further detail with reference to specific embodiments.
A dynamic pushing type rotary motor is matched with a drill bit, and can effectively improve the drilling rate by applying power to the drill bit near the drill bit, and can be used for various drilling processes such as deep drilling, vertical drilling, large-displacement horizontal wells and the like.
The dynamic pushing type rotary motor comprises an outer tube 2, an upper joint 1, an upper support 3, an upper centralizing ring 4, a rotor assembly 5, a sealing rod 15, a stator 6, a distributing valve 7, a lower support ring 8, a lower support 10, a connecting shaft 9, a connecting sleeve 11, a lower joint 12 and a main shaft 13, wherein the rotor assembly 5 comprises a rotor main body 31 and four rotor pushing blocks 32, and a reset block 14 is arranged between the stator 6 and the rotor assembly 5.
The outer wall of the upper joint 1 is provided with a trapezoid external thread, the inner wall of the outer tube 2 is provided with a trapezoid internal thread, and the upper joint 1 is connected with the outer tube 2 through the trapezoid external thread and the trapezoid internal thread at the upper part of the outer tube 2; the inner wall of the upper joint 1 is provided with conical pipe internal threads, and the upper joint 1 can be connected with an external drilling tool, a drill rod and the like through the conical pipe internal threads. The outer wall of the upper part of the connecting sleeve 11 is provided with a trapezoid external thread, and the upper part of the connecting sleeve 11 is connected with the outer tube 2 through the trapezoid external thread and the trapezoid internal thread of the lower part of the outer tube 2; the inner wall of the lower part of the connecting sleeve 11 is provided with a trapezoid internal thread, the outer wall of the lower joint 12 is provided with a trapezoid external thread, and the lower part of the connecting sleeve 11 is connected with the lower joint 12 through the trapezoid internal thread and the trapezoid external thread of the lower joint 12; the lower joint 12 is sleeved outside the main shaft 13.
The upper end of the upper support 3 is abutted against the lower surface of the upper joint 1, and the outer side of the circumference of the upper support 3 is abutted against the inner wall of the outer tube 2; the upper support 3 is fixed with the stator 6 through four screws, a hole is formed in the center of the upper support 3 and provided with a spline groove, the flow distribution valve 7 penetrates through the center of the upper support 3, a spline is arranged on the upper portion of the outer wall of the flow distribution valve 7, and the flow distribution valve 7 is connected with the upper support 3 through the spline.
The upper centering ring 4 is cylindrical with a central opening, the upper centering ring 4 is positioned below the upper support 3 and above the rotor assembly 5, the upper centering ring 4 is fixedly connected with the upper part of the rotor assembly 5 through four screws, the outer circumference of the upper centering ring 4 abuts against the stator 6, the inner side of the upper centering ring 4 abuts against the flow distribution valve 7, and the contact relation enables the upper centering ring 4 to rotate together with the rotor assembly 5.
The length of the rotor main body 31 and the length of the four rotor pushing blocks 32 in the rotor assembly 5 are the same, the four rotor pushing blocks 32 are connected with the rotor main body 31 through concentric circular shafts, the four rotor pushing blocks 32 are uniformly distributed on the periphery of the rotor main body 31, the rotor main body 31 and the four rotor pushing blocks 32 are arranged on the circumference of the rotor main body 31 in an angle mode, grooves for accommodating the rotor pushing blocks 32 are formed in the rotor main body 31, and when one pair of rotor pushing blocks 32 and the sealing rod 15 are pushed to the inner wall formed by the stator 6 and the reset block 14, the other pair of rotor pushing blocks 32 are pushed back into the grooves of the rotor main body 31 by the reset block; the rotor main body 31 is provided with flow guide ports according to the positions and angles of the four rotor push blocks 32, and the flow guide ports penetrate from the inner wall of the rotor main body 31 to the outer wall of the rotor main body 31 to form a flow passage capable of pushing the rotor push blocks 32 to rotate. The upper part of the rotor assembly 5 is fixedly connected with the upper centralizing ring 4 through screws, the lower part of the rotor assembly 5 is connected with the lower supporting ring 8 through screws, the upper centralizing ring 4 and the lower supporting ring 8 are fixed with the axial position of the stator 6, so that the axial position of the rotor assembly 5 is relatively fixed, and the rotor assembly 5 cannot axially translate. The rotor body 31 of the rotor assembly 5 is hollow and penetrates through the center of the rotor assembly 5, and the fluid is distributed through the distribution valve 7. The lower part inner wall of rotor subassembly 5 is equipped with the flat key, and the outer wall of connecting axle 9 upper portion is equipped with flat keyway, and rotor subassembly 5 lower part is connected with connecting axle 9 upper portion through the flat key.
The upper part of the stator 6 is connected with the upper support 3 through a screw, the lower part of the stator 6 is contacted with the lower support 10 and the connecting sleeve 11, and the position of the stator 6 is fixed through the jacking force of the lower support 10 and the connecting sleeve 11. The outer surfaces of the upper part and the lower part of the stator 6 are contacted with the inner surface of the outer tube 2, and an annulus is reserved between the outer surface of the middle section of the stator 6 and the outer tube 2. Two circular through holes are formed in the inner wall of the stator 6 at the central symmetry position, each circular through hole is fixedly connected with one reset block 14 through a screw, and the inner wall of the stator 6 is fixedly connected with the two reset blocks 14 through the screw. A centrally symmetrical flow guide port is arranged on the stator at an angle of 45 degrees with the circular through hole, and the flow guide port enables fluid to flow from the flow distribution valve to an annular space between the stator and the outer tube.
The lower support ring 8 is fixed with the connecting shaft 9 through screws, and the outer wall of the lower support ring 8 is abutted against the stator 6; the outer wall of the lower part of the connecting shaft 9 can be inserted into the inner wall of the main shaft 13 for socket connection, so that the shape and the size of the outer wall of the lower part of the connecting shaft 9 and the inner wall of the main shaft 13 are matched, and the outer wall of the lower part of the connecting shaft 9 and the inner wall of the main shaft 13 can be designed into a regular hexagon; the lower support 10 is sleeved on the outer wall of the connecting shaft 9.
The upper side of the lower support 10 is abutted against the lower end of the stator 6, the lower part of the lower support 10 is abutted against a bearing, the outer side of the lower support 10 is abutted against the inner wall of the connecting sleeve 11, the lower support 10 is sleeved on the outer wall of the connecting shaft 9, and the lower support 10 is fixed in position by the contact relation. The outer wall of the bearing abuts against the inner wall of the connecting sleeve 11.
The outer wall of the lower part of the connecting shaft 9 is inserted into the inner wall of the main shaft 13 and connected through a socket, the lower joint 12 is sleeved on the outer side of the main shaft 13, and the inner side of the bearing abuts against the outer wall of the main shaft 13, so that the position of the main shaft 13 is stable, and the central axis of the main shaft 13 is ensured to be kept stable during rotation.
The rotor pushing block 32 of the rotor assembly 5 is connected with the sealing rod 15, the sealing rod 15 is coaxially connected with the rotor pushing block 32, the sealing rod 15 is equal in length with the rotor pushing block 32 and can synchronously rotate, and the rotor assembly 5 and the stator 6 are sealed through the sealing rod 15, so that four areas which are not communicated with each other are formed between the rotor assembly 5 and the stator 6.
When the dynamic pushing-leaning rotary motor is used as a novel underground power drilling tool, the upper joint 1 is connected with a drill rod or other drilling tool combinations during drilling, the main shaft 13 is connected with a drill bit, working fluid (slurry) flows from the upper joint 1 to the flow distribution valve 7, the slurry flows to the flow guide opening of the rotor assembly 5 after being distributed by the flow distribution valve 7, the rotor pushing blocks 32 of the rotor assembly 5 are pushed outwards under the action of fluid thrust until the rotor pushing blocks 32 and the sealing rod 15 are pushed to the inner wall formed by the stator 6 and the resetting block 14, the other two rotor pushing blocks 32 cannot be pushed out due to the obstruction of the resetting block 14, the space formed by the rotor assembly 5, the stator 6 and the resetting block 14 can be divided into four cavities by the two rotor pushing blocks 32 pushed to the inner wall of the stator 6 under the sealing action of the sealing rod 15, and the two cavities are communicated with the annular space formed by the stator 6 and the stator 2 through the flow guide opening on the stator 6, so that two high-pressure cavities and two low-pressure cavities are formed according with the principle of the motor. Under the action of the pressure difference, the fluid pushes the rotor assembly 5 to rotate, and during the rotation process, two completely pushed-out rotor push blocks 32 are pushed back when encountering the reset block 14, while the other two not pushed-out rotor push blocks 32 are completely pushed out, so that the actions of forming four cavities are repeated. Under the rotation of the rotor assembly 5, power is transmitted to the main shaft 13 through the connecting shaft 9, and the main shaft 13 drives the drill bit connected with the main shaft to rotate, so that the function of the underground power drilling tool is realized.
All components of the dynamic pushing type rotary motor are metal components and high-temperature resistant components, and the dynamic pushing type rotary motor can be used in a high-temperature environment with the temperature of more than 250 ℃. The positive displacement fluid pressure transmission mechanism is used in the working process of the motor, so that the advantages of the screw motor are well inherited, and the service life of the motor is effectively prolonged because the rubber part is not used for sealing. According to the working mechanism, the drilling tool can develop underground power drilling tool series suitable for small, medium and large calibers, meets the requirements of various drilling wells, has a simple structure, is relatively independent in each component part, is convenient to assemble, disassemble and maintain, and is also convenient to make corresponding optimization adjustment on the drilling tool structure according to specific working condition.
Specific examples are set forth herein to illustrate the invention in detail, and the description of the above examples is only for the purpose of aiding in understanding the core concept of the invention. It should be noted that any obvious modifications, equivalents, or other improvements to those skilled in the art without departing from the inventive concept are intended to be included in the scope of the present invention.
Claims (7)
1. The dynamic pushing type rotary motor comprises an upper joint, an outer pipe, a main shaft, a rotor assembly, a sealing rod, a stator, a reset block, a flow distribution valve, an upper support and an upper centering ring, wherein the upper joint, the outer pipe and the main shaft are sequentially connected;
The stator is sleeved in the outer tube, the upper part and the lower part of the stator are in contact with the inner surface of the outer tube, and an annulus is reserved between the outer surface of the middle section of the stator and the outer tube;
The stator is sleeved with the rotor assembly, the rotor assembly comprises a rotor main body and four rotor pushing blocks which are connected through a concentric shaft, the four rotor pushing blocks are uniformly distributed on the periphery of the rotor main body, the lengths of the rotor main body and the four rotor pushing blocks are the same, the rotor main body and the four rotor pushing blocks are arranged on the circumference of the rotor main body in an angle mode, a groove for accommodating the rotor pushing blocks is formed in the rotor main body, the groove is matched with the shape of the rotor pushing blocks, and a plurality of flow guide ports penetrating through the inner wall of the rotor main body are formed in the bottom of the groove; the sealing rod is arranged on the rotor pushing block, and the sealing rod enables four areas which are not communicated with each other to be formed between the rotor assembly and the stator;
a flow distribution valve is sleeved in the rotor assembly, the flow distribution valve is cylindrical with a central opening, and fluid flows through the flow distribution valve for flow distribution;
Two circular through holes which are symmetrical in center are formed in the inner wall of the stator, and each circular through hole is connected with one reset block through a screw; the stator is provided with symmetrical flow guiding ports at an angle of 45 degrees with the circular through hole, and the flow guiding ports enable fluid to flow from the flow distributing valve to an annular space between the stator and the outer tube;
The upper support is annular and connected with the stator, the upper support is connected with the flow distribution valve, and the upper support abuts against the upper joint and the inner wall of the outer tube;
The upper centering ring is fixedly connected to the rotor assembly and abuts the stator and the distribution valve.
2. The dynamic push-back rotary motor according to claim 1, wherein the outer wall of the upper joint is provided with trapezoidal external threads, the inner wall of the outer tube is provided with trapezoidal internal threads, and the upper joint is in threaded connection with the outer tube; the upper support is connected with the stator through bolts; the inner wall of the upper support is provided with spline grooves, the upper part of the outer wall of the flow distribution valve is provided with a spline, and the flow distribution valve is connected with the upper support through the spline and the spline grooves.
3. The dynamic push-back rotary motor of claim 1 further comprising a connecting shaft, an upper portion of the connecting shaft connecting the rotor assembly and a lower portion connecting an upper portion of the main shaft.
4. A dynamic push-back rotary motor as claimed in claim 3 wherein the upper portion of the connecting shaft is connected to the rotor assembly by a flat key.
5. A dynamic push-back rotary motor according to claim 3, wherein the connecting shaft is annular, and the outer wall of the lower part of the connecting shaft is inserted into the inner wall of the main shaft for socket connection.
6. A dynamic push-back rotary motor as claimed in claim 3 further comprising a lower support ring, the lower support ring being annular, the lower support ring being connected to the rotor assembly, the connecting shaft, respectively, an outer wall of the lower support ring abutting the stator.
7. A dynamic push-back rotary motor according to claim 3, further comprising a lower support, a lower joint and a connecting sleeve, wherein the lower support, the lower joint and the connecting sleeve are all annular, the upper part of the connecting sleeve is connected with the outer tube, the lower support is sleeved on the connecting shaft, the lower support abuts against the lower part of the stator and the inner wall of the connecting sleeve, the lower joint is sleeved on the main shaft, and the lower joint is connected with the connecting sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622897.6A CN109505728B (en) | 2018-12-28 | 2018-12-28 | Dynamic pushing type rotary motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622897.6A CN109505728B (en) | 2018-12-28 | 2018-12-28 | Dynamic pushing type rotary motor |
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| Publication Number | Publication Date |
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| CN109505728A CN109505728A (en) | 2019-03-22 |
| CN109505728B true CN109505728B (en) | 2024-07-30 |
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| CN201811622897.6A Active CN109505728B (en) | 2018-12-28 | 2018-12-28 | Dynamic pushing type rotary motor |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219603B (en) * | 2019-07-17 | 2024-05-10 | 中国地质大学（北京） | Thrust actuator of small-diameter coring type vertical drilling tool |
| CN110593752B (en) * | 2019-10-22 | 2024-03-22 | 中国地质大学（北京） | All-metal underground power drilling tool based on multistage double-plunger-eccentric gear mechanism |
| CN113389681A (en) | 2021-06-08 | 2021-09-14 | 中国地质大学（北京） | All-metal dynamic seal concentric centralizing type downhole volume motor |
| CN113217267B (en) * | 2021-06-08 | 2022-02-11 | 中国地质大学（北京） | All-metal high-temperature-resistant cycloid type downhole motor |
| CN113503128B (en) * | 2021-07-12 | 2022-01-04 | 中国地质大学（北京） | All-metal concentric forced flow distribution positive displacement downhole motor |
| CN115370282A (en) * | 2022-08-09 | 2022-11-22 | 中国地质大学（北京） | Vane type downhole power drilling tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2660402A (en) * | 1949-12-19 | 1953-11-24 | Verbol J Devine | Core drilling apparatus |
| US6976832B1 (en) * | 1999-05-31 | 2005-12-20 | Merlin Corporation Pty. Ltd. | Fluid rotary machine |
| CN209244724U (en) * | 2018-12-28 | 2019-08-13 | 中国地质大学（北京） | Dynamic pushing type rotary motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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