CN111608583A - Directional drilling hole bottom motor auxiliary branch-opening device - Google Patents
Directional drilling hole bottom motor auxiliary branch-opening device Download PDFInfo
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- CN111608583A CN111608583A CN202010624125.7A CN202010624125A CN111608583A CN 111608583 A CN111608583 A CN 111608583A CN 202010624125 A CN202010624125 A CN 202010624125A CN 111608583 A CN111608583 A CN 111608583A
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- lower joint
- rotating shaft
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- hole
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- 238000005553 drilling Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000005484 gravity 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an auxiliary branch opening device for a directional drilling hole bottom motor, which belongs to the technical field of directional drilling under a coal mine, and comprises a branch opening mechanism, wherein the branch opening mechanism is arranged behind the hole bottom motor and consists of an upper barrel, a rotating shaft assembly, a valve plate, a lower joint and an ejection assembly; the rotating shaft assembly is rotatably arranged in the upper barrel, a valve plate is arranged at the end, facing the lower joint, of the rotating shaft assembly, an ejection assembly is arranged on the outer wall of the lower joint, and a pressure water source is distributed into a flow channel defined in the lower joint through the valve plate and is made to perform telescopic action in the radial direction of the lower joint. When the branch-opening drilling is carried out, the additional thrust can be applied to the upper part of the hole wall, so that the motor elbow at the bottom of the hole can effectively drill downwards, the branch-opening efficiency and the success rate are improved, meanwhile, the auxiliary branch-opening operation can be carried out at any time in the drilling process, and the practicability and the convenience are improved.
Description
Technical Field
The invention belongs to the technical field of directional drilling under a coal mine, and particularly relates to a motor-assisted branch opening device for directional drilling of a hole bottom.
Background
The earliest application scenario of the directional drilling technology is directional drilling along the coal seam of the coal seam, and along with the development of technical equipment, the directional drilling in the rock stratum is also applied more and more. In the coal bed directional drilling of the coal bed, the branch drilling is easy because the common hardness coefficient of the coal bed is smaller. However, in the directional drilling of the rock stratum, if the situation that the branch drilling is necessary is met, the hardness coefficient of the rock stratum is higher or lower than that of the coal stratum, and if the drilling track is not well controlled during the directional drilling of the front section, a branch point is not reserved, the difficulty in successfully performing the branch drilling is quite large. In the existing method, a motor elbow at the bottom of a hole is adjusted to be vertically downward, a position where a drilling track is continuously lifted is selected, the drilling speed is reduced to be low enough, and then the drilling is forcibly performed downwards by means of the self weight of a drilling tool to perform branch drilling. However, this method is time consuming and may also be unsuccessful in branch drilling when hard formations are encountered. Therefore, with the continuous popularization and development of the underground coal mine directional drilling technology in recent years, the technology is more and more widely applied in the field of industry, and meanwhile, the corresponding technical bottleneck is gradually reflected.
Disclosure of Invention
In view of the above, the present invention provides an auxiliary branch opening device for a directional drilling downhole motor, which solves the problem of low efficiency and success rate of downward drilling and branch opening of a downhole motor elbow.
The invention is realized by the following technical scheme:
the invention provides an auxiliary branch opening device for a directional drilling hole bottom motor, which comprises a branch opening mechanism, a branch opening mechanism and a branch opening mechanism, wherein the branch opening mechanism is arranged behind the hole bottom motor and consists of an upper barrel, a rotating shaft assembly, a valve plate, a lower joint and an ejection assembly; the rotating shaft assembly is rotatably arranged in the upper barrel, a valve plate is arranged at the end, facing the lower joint, of the rotating shaft assembly, an ejection assembly is arranged on the outer wall of the lower joint, and a pressure water source is distributed into a flow channel defined in the lower joint through the valve plate and is made to perform telescopic action in the radial direction of the lower joint.
By adopting the scheme, when the directional drilling needs to be carried out by branch drilling, the elbow of the hole bottom motor is adjusted to be completely downward, and the invention additionally connected to the rear end of the hole bottom motor can utilize the pressure water source in the original drill rod as power, input the ejection assembly through the flow distribution channel, extend the ejection assembly and provide an upward pushing acting force, thereby providing a downward reverse acting force for the hole bottom motor and helping the hole bottom motor to finish downward drilling into and out of branch holes. After the branch drilling is finished, the motor elbow at the bottom of the hole is only required to be turned to other directions and is not completely downward, so that the flow distribution channel in the branch drilling device can be closed, the ejection assembly is retracted by means of the extrusion of the hole wall, and the normal directional drilling is not influenced.
Furthermore, the rotating shaft assembly is an eccentric counterweight structure and consists of a rotating shaft and an eccentric counterweight. Can rotate by means of self gravity.
Furthermore, an upper end seat and a lower end seat which are respectively provided with two ends of the rotating shaft component are arranged in the upper cylinder, shaft sleeves are respectively arranged between the upper end seat and the rotating shaft and between the lower end seat and the rotating shaft, and the upper end seat and the lower end seat are respectively and fixedly connected with the upper end seat and the lower end seat through fastening screws.
Furthermore, a check ring which is clamped on the rotating shaft and used for fixing the lower end cover is arranged in the upper cylinder. The retainer ring is used for limiting, and axial movement is prevented.
Furthermore, the rotating shaft is also provided with a stepped shaft neck which is fixed with the upper end seat, the lower end seat and the check ring.
Furthermore, the valve plate is fixedly connected with the end part of the rotating shaft through a shaft head screw, a shaft ring and a flat key. And axially limiting and fastening the port plate.
Furthermore, the lower joint is connected with the hole bottom motor in a welding or threaded mode, the upper barrel is inserted into the clamping groove of the lower joint and is connected with the lower joint in a welding mode, and the ejection assembly is connected with the lower joint in a screwing mode.
Furthermore, a distribution through hole for a pressure water source to enter is arranged on the distribution plate, a flow passage defined in the lower joint comprises a distribution passage communicated with the distribution through hole and a discharge passage communicated with the outside, and an input flow passage communicated with the distribution passage is arranged in the ejection assembly.
Furthermore, the aperture of the distribution channel is 2-3 times of that of the discharge channel and 0.4-0.8 time of that of the input channel.
Further, the ejection assembly comprises a top disc, a cylinder cover, a cylinder body and a plunger rod, wherein the cylinder body is provided with the input flow channel, and the movement stroke of the plunger rod is 4-6 mm.
The invention has the beneficial effects that: the device is additionally connected to the rear end of the hole bottom motor through threads, and an additional thrust is applied to the upper part of the hole wall when the branch drilling is carried out, so that the hole bottom motor elbow can drill downwards more effectively, the labor intensity of workers is reduced, the operation flow is simplified, and the branch drilling efficiency and success rate are improved. Simultaneously, be different from the whipstock in the past need withdraw from downthehole drilling rod earlier, put into the whipstock in downthehole again, accomplished the operation process whether take out the whipstock behind the hole depending on the circumstances, this device can be at any time supplementary branch operation of opening of creeping into the in-process, has improved practicality and convenience.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the relative position and angle between the branch opening mechanism and the hole bottom motor according to the present invention.
Fig. 2 is a schematic view of the overall structure of the branch-opening mechanism of the present invention.
Fig. 3 is a schematic structural view of the ejection assembly of the present invention.
Fig. 4 is a schematic structural view of a port plate in the invention, wherein a is a top view and b is a sectional view.
Fig. 5 is a schematic structural diagram of a rotating assembly in the present invention.
Fig. 6 is a schematic view of a lower joint structure of the present invention, wherein a is a right side view and b is a sectional view.
Reference numerals: the branch opening mechanism 1, a hole bottom motor 2, an upper barrel 101, a shaft sleeve 102, an upper end seat 103, an upper end cover 104, a lower end seat 105, a lower end cover 106, a retainer ring 107, a rotating shaft assembly 108, a flat key 109, a valve plate 110, a shaft ring 111, a shaft head screw 112, a lower joint 113 and an ejection assembly 114; top plate 11401, cylinder cover 11402, cylinder body 11403, plunger rod 11404, sealing members 11405, 11406; a shaft 10801, an eccentric weight 10802, a stepped journal 10803; the flow distribution through hole A, the flow distribution channel B, the flow discharge channel C and the input channel D.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
As shown in fig. 1 and 2, the auxiliary branching device for the directional drilling hole bottom motor in the invention comprises a branching mechanism 1, which is installed at the rear part of a hole bottom motor 2 and consists of an upper barrel 101, a rotating shaft assembly 108, a port plate 110, a lower joint 113 and an ejection assembly 114, wherein the lower joint 113 is installed with the upper barrel 101 deviating from the deviating end connected with the hole bottom motor 2, namely the lower joint is welded or screwed with the hole bottom motor, and the upper barrel is inserted into a clamping groove of the lower joint and is welded with the lower joint; the rotating shaft assembly 108 is rotatably arranged in the upper barrel 101, a valve plate 110 is arranged at the corresponding end of the lower joint 113 facing the rotating shaft assembly, the valve plate can be driven to rotate by the rotating assembly 108, an ejection assembly 114 is arranged on the outer wall of the lower joint 113, the ejection direction of the ejection assembly and the direction of the hole bottom motor elbow form 180 degrees, a pressure water source is distributed into a flow channel defined in the lower joint 113 by the valve plate 110, and the ejection assembly 114 makes telescopic action in the radial direction of the lower joint 113.
By adopting the scheme, when the directional drilling needs to be carried out by branch drilling, the elbow of the hole bottom motor is adjusted to be completely downward, and the invention additionally connected to the rear end of the hole bottom motor can utilize the pressure water source in the original drill rod as power, input the ejection assembly through the flow distribution channel, extend the ejection assembly and provide an upward pushing acting force, thereby providing a downward reverse acting force for the hole bottom motor and helping the hole bottom motor to finish downward drilling into and out of branch holes. After the branch drilling is finished, the motor elbow at the bottom of the hole is only required to be turned to other directions and is not completely downward, so that the flow distribution channel in the branch drilling device can be closed, the ejection assembly is retracted by means of the extrusion of the hole wall, and the normal directional drilling is not influenced.
Referring to fig. 4 and 5, an upper end seat 104 is designed at the upper part in the upper barrel 101, the shaft sleeve 102 is installed, the upper end cover 103 is fastened on the upper end seat 104 by fastening screws, the installation and positioning of the shaft sleeve 102 at the upper end are completed, the same shaft sleeve 102 is installed in the lower end seat 105 similarly, the lower end cover 106 is fastened on the lower end seat 105 by fastening screws, the installation and positioning of the shaft sleeve 102 at the lower end are completed, two ends of a rotating assembly 108 are respectively installed in the shaft sleeves 102 at the upper and lower ends, the lower end is connected with a valve plate 110 by a flat key 109 to transmit a rotating force, and the valve plate 110 is fastened on the lower shaft end of the rotating assembly 108 by a shaft head screw 112 and a shaft ring 111, and the rotating assembly 108 is an eccentric weight structure, and is composed of a rotating shaft 10801 and an eccentric weight 10802 welded along the axial direction of the rotating shaft, and can drive the valve. A retainer ring 107 that is engaged with the rotating shaft 10801 and fixes the lower end cover 106 is provided in the upper cylinder 101, and is restricted by the retainer ring to prevent axial movement. The shaft 10801 is further provided with a stepped journal 10803, which is fixed with the upper end seat 104, the lower end seat 105 and the retaining ring 107. The upper end seat and the upper barrel are of an integrated structure so as to enhance the structural stability of the device.
Referring to fig. 3 and 6, a distribution through hole a into which a pressure water source enters is formed in the distribution plate 110, a flow channel defined in the lower joint 113 includes a distribution channel B communicated with the distribution through hole a and a discharge channel C communicated with the distribution channel B and the outside, an input flow channel D communicated with the distribution channel B is formed in the ejection assembly 114, that is, the distribution through hole a is designed at the top of the distribution plate 110, the distribution channel B is designed at the top of the lower joint 113, and when the rotation assembly 108 drives the distribution plate 110 to rotate by rotating the hole bottom motor 2, so that the distribution through hole a of the distribution plate 110 and the distribution channel B of the lower joint 113 are axially overlapped, power water enters the distribution channel B of the lower joint 113; when the axial direction is not coincident, the power water can not enter the distributing channel B of the lower joint 113. The ejection assembly 114 consists of a top disc 11401, a cylinder cover 11402, a cylinder body 11403, a plunger rod 11404, sealing elements 11405 and 11406, an input flow channel D is arranged on the cylinder body, the diameter of the flow channel B of the lower joint 113 is 6mm, the diameter of the flow channel C is 2mm, and the diameter of the input flow channel D in the ejection assembly 114 is 10mm, when power water enters the flow channel B of the lower joint 113, most of the power water enters the cylinder body 11403 through the input flow channel D in the ejection assembly 114, the plunger rod 11404 is pushed to move upwards, the stroke is 5mm, so that the top disc 11401 is ejected on the hole wall, a downward acting force is applied to the whole device, and the ejection action is completed; when the power water can not enter the flow distribution channel B of the lower joint 113 by rotating the hole bottom motor 2, the top disc 11401 is pressed by the hole wall to drive the plunger rod 11404 to move downwards, and the water in the cylinder 11403 is extruded out of the ejection assembly 114 and is discharged through the drain channel C of the lower joint 113 to complete the retraction action.
The flow distribution through hole is designed right above the flow distribution plate in the embodiment, the flow distribution through hole is communicated with the lower joint flow distribution channel and then passes through a pressure water source, a key groove is designed in a direction of 180 degrees with the flow distribution through hole, the rotating assembly and the flow distribution plate rotate together through flat key connection, the flow distribution hole in the flow distribution plate and the eccentric balancing weight of the rotating assembly form 180 degrees, the shaft head screw is used for installing the shaft ring at the shaft end of the rotating assembly, and the axial limiting and fastening are carried out on the flow distribution plate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The auxiliary branch opening device for the directional drilling hole bottom motor is characterized by comprising a branch opening mechanism (1), wherein the branch opening mechanism (1) is arranged behind a hole bottom motor (2) and consists of an upper barrel (101), a rotating shaft assembly (108), a valve plate (110), a lower joint (113) and an ejection assembly (114), and the lower joint is provided with the upper barrel by deviating from the deviating end of the lower joint connected with the hole bottom motor; the rotating shaft assembly is rotatably arranged in the upper barrel, a valve plate is arranged at the end, facing the lower joint, of the rotating shaft assembly, an ejection assembly is arranged on the outer wall of the lower joint, and a pressure water source is distributed into a flow channel defined in the lower joint through the valve plate and is made to perform telescopic action in the radial direction of the lower joint.
2. The directional drilling downhole motor assisted branch opening device according to claim 1, wherein the rotating shaft assembly is an eccentric weight structure and is composed of a rotating shaft (10801) and an eccentric weight (10802).
3. The bottom motor branch device of the directional drilling hole according to claim 2, wherein the upper cylinder is provided with an upper end seat (103) and a lower end seat (105) for respectively mounting two ends of the rotating shaft assembly, a shaft sleeve (102) is respectively arranged between the upper end seat and the rotating shaft and between the lower end seat and the rotating shaft, and the upper end seat and the lower end seat are respectively and fixedly connected with the upper end seat and the lower end seat through fastening screws by an upper end cover (104) and a lower end cover (106).
4. The directional drilling downhole motor assisted branch opening device according to claim 3, wherein a retaining ring (107) is arranged in the upper cylinder, and the retaining ring is clamped on the rotating shaft and used for fixing the lower end cover.
5. The bottom-hole motor assisted branch opening device for directional drilling according to claim 4, wherein the rotating shaft is further provided with a stepped journal (10803) which is assisted with the stepped journal to be fixed with the upper end seat, the lower end seat and the retainer ring.
6. The directional drilling hole bottom motor auxiliary branch device according to claim 2, characterized in that the port plate is fixedly connected with the end of the rotating shaft through a spindle head screw (112), a spindle ring (111) and a flat key (109).
7. The device of claim 1, wherein the lower joint is connected to the downhole motor by welding or screwing, the upper barrel is inserted into the slot of the lower joint and connected thereto by welding, and the ejection assembly is connected to the lower joint by screwing.
8. The bottom-hole motor auxiliary branch opening device for directional drilling according to claim 1, wherein the port plate is provided with a port hole (a) for pressure water to enter, the flow channel defined in the lower joint comprises a port channel (B) communicated with the port hole and a drain channel (C) communicated with the outside, and the ejection assembly is provided with an input flow channel (D) communicated with the port channel.
9. The device of claim 8, wherein the aperture of the distribution channel is 2-3 times of the aperture of the discharge channel and 0.4-0.8 times of the aperture of the input channel.
10. The directional drilling downhole motor auxiliary branch-off device according to claim 8 or 9, wherein the ejection assembly is composed of a top plate (11401), a cylinder cover (11402), a cylinder body (11403), a plunger rod (11404) and a sealing element (11405, 11406), the cylinder body is provided with the input flow passage, and the movement stroke of the plunger rod is 4-6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624125.7A CN111608583A (en) | 2020-06-30 | 2020-06-30 | Directional drilling hole bottom motor auxiliary branch-opening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624125.7A CN111608583A (en) | 2020-06-30 | 2020-06-30 | Directional drilling hole bottom motor auxiliary branch-opening device |
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| Publication Number | Publication Date |
|---|---|
| CN111608583A true CN111608583A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010624125.7A Pending CN111608583A (en) | 2020-06-30 | 2020-06-30 | Directional drilling hole bottom motor auxiliary branch-opening device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118049138A (en) * | 2024-04-16 | 2024-05-17 | 中国石油大学(华东) | Rotary steering drilling system and drilling method for geological drilling of high-temperature thick target layer |
-
2020
- 2020-06-30 CN CN202010624125.7A patent/CN111608583A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118049138A (en) * | 2024-04-16 | 2024-05-17 | 中国石油大学(华东) | Rotary steering drilling system and drilling method for geological drilling of high-temperature thick target layer |
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