CN110552617A - Radial drilling completion method and system for deep well - Google Patents
Radial drilling completion method and system for deep well Download PDFInfo
- Publication number
- CN110552617A CN110552617A CN201810563582.2A CN201810563582A CN110552617A CN 110552617 A CN110552617 A CN 110552617A CN 201810563582 A CN201810563582 A CN 201810563582A CN 110552617 A CN110552617 A CN 110552617A
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- pipeline
- deep well
- reservoir
- radial bore
- target
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 title abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 238000001802 infusion Methods 0.000 claims abstract description 24
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 239000011435 rock Substances 0.000 abstract description 19
- 235000019738 Limestone Nutrition 0.000 abstract description 17
- 238000004891 communication Methods 0.000 abstract description 17
- 239000006028 limestone Substances 0.000 abstract description 17
- 239000012224 working solution Substances 0.000 abstract description 5
- 239000002253 acid Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- E21B7/046—Directional drilling horizontal drilling
-
- 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
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Landscapes
- 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 provides a radial drilling completion method for a deep well, which comprises the following steps: the method comprises the following steps of (1) enabling a pipeline with a steering gear at the bottom to be lowered to a target interval of the deep well; determining the position of a storage body in the target layer section, and determining the target direction of the steering gear according to the position; fixing the pipeline; and (3) lowering the infusion pipeline to the target layer section from the interior of the pipeline, and pumping working fluid into the infusion pipeline to communicate with the reservoir body. The invention can break the rock of the deep well through the working solution and the infusion pipeline, optimize the pressure loss and the friction force of the system to achieve the goal of footage, and can also determine the orientation of the storage body in the target layer section through the positioning device. The invention can realize the targeted communication of the unconsumed reservoir bodies of the deep well oil reservoir and the high-efficiency utilization around the well. For example, the target communication of unconsumed reservoirs of 6500m deep well hard limestone oil reservoirs and the high-efficiency exploitation around the wells are realized.
Description
Technical Field
The invention relates to the field of oil and gas exploitation, in particular to a method and a system for completing a deep well by radial drilling.
Background
In the field of oil and gas exploitation, a large number of cracks and holes exist around a deep-well carbonate reservoir well, the conventional thinking and the conventional process have single communication direction, residual reservoirs around the well cannot be used in an all-round and efficient manner, a targeted communication technical system needs to be constructed, all-round communication is realized, and the reserve utilization degree is greatly improved.
The existing technology for communicating residual reservoirs around a well is limited to a cased well with a depth of 3800m and medium-soft sandstone, and has a plurality of problems in carbonate reservoirs with the depth of 6500m and the like. For example, the deep well has harder rock, the compressive strength of the deep well is more than 5 times that of the shallow well, the pressure consumption of the system is large, and the depth cannot be reached by adopting clean water and a conventional spray head. And the coiled tubing equipment of the shallow well is not suitable for the pressure loss requirement and the acid resistance of the deep well.
Accordingly, the present invention provides a method and system for radial bore completion of a deep well.
disclosure of Invention
To solve the above problems, the present invention provides a method for completing a radial borehole in a deep well, the method comprising the steps of:
lowering the pipeline with the diverter at the bottom to the target interval of the deep well;
Determining the position of a storage body in the target layer section, and determining the target direction of the steering gear according to the position;
Fixing the pipeline;
and (3) descending a liquid conveying pipeline from the interior of the pipeline to the target interval, and pumping working fluid into the liquid conveying pipeline to communicate with the reservoir body.
According to one embodiment of the invention, the orientation of the reservoir within the interval of interest is determined by a high temperature deep well directional gyroscope.
According to one embodiment of the invention, the step of fixing the pipe comprises the steps of:
And sitting and hanging a pipeline anchor on the pipeline to fix the pipeline.
according to one embodiment of the invention, the step of lowering a fluid delivery pipe from the inside of the pipe to the interval of interest and pumping a working fluid into the fluid delivery pipe to communicate with the reservoir comprises the following steps:
And (3) a liquid conveying pipeline with a high-pressure hose at the bottom is lowered to the target layer section from the interior of the pipeline, when the liquid conveying pipeline is lowered to the upper end of the steering gear, the working liquid is pumped into the liquid conveying pipeline, so that the nozzle at the head of the high-pressure hose carries the high-pressure hose into the stratum under the action of self-feeding force until the nozzle is communicated with a reservoir body.
According to one embodiment of the invention, the working fluid is hydrochloric acid.
According to another aspect of the present invention there is also provided a radial bore completion system for a deep well, the system comprising:
a duct with a diverter at its bottom;
A positioning device for determining the orientation of the reservoir within the interval of interest;
A fixing device for fixing the pipe;
and the infusion pipeline is used for pumping working fluid into the infusion pipeline from the interior of the pipeline to the target interval so as to communicate with a reservoir body.
According to one embodiment of the invention, the positioning device is a high temperature deep well directional gyroscope.
According to one embodiment of the invention, the fixing device is a tubing anchor.
According to one embodiment of the invention, the system further comprises: the high-pressure hose is installed at the bottom of the infusion pipeline, the head of the high-pressure hose is provided with a nozzle, and when the working fluid is pumped into the infusion pipeline, the nozzle carries the high-pressure hose to enter a stratum under the action of self-feeding force until communicating with a reservoir body.
According to one embodiment of the invention, the system further comprises: and the jet pump is used for pumping the working fluid to the infusion pipeline.
The method and the system for completing the deep well by the radial drilling can solve the problem of rock breaking of the deep well rock through the working fluid and the infusion pipeline, optimize the pressure loss and the friction force of the system so as to achieve the purpose of footage, and can also determine the orientation of a storage body in a target layer section through the positioning device. The invention can realize the targeted communication of the unconsumed reservoir bodies of the deep well oil reservoir and the high-efficiency utilization around the well. For example, the target communication of unconsumed reservoirs of 6500m deep well hard limestone oil reservoirs and the high-efficiency exploitation around the wells are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
drawings
the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 shows a flow diagram of a radial bore completion method for a deep well according to an embodiment of the present invention;
FIG. 2 shows a flow diagram of a radial bore completion method for a deep well according to another embodiment of the present invention;
FIG. 3 shows a block diagram of a radial bore completion system for a deep well according to an embodiment of the present invention; and
FIG. 4 shows a block diagram of a radial bore completion system for a deep well according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
In the field of oil and gas exploitation, a large number of cracks and holes exist around a deep-well carbonate reservoir well, the conventional thinking and the conventional process have single communication direction, residual reservoirs around the well cannot be used in an all-round and efficient manner, a targeted communication technical system needs to be constructed, all-round communication is realized, and the reserve utilization degree is greatly improved.
the existing technology for communicating residual reservoirs around a well is limited to a cased well with a depth of 3800m and medium-soft sandstone, and has a plurality of problems in carbonate reservoirs with the depth of 6500m and the like. For example, the deep well has harder rock, the compressive strength of the deep well is more than 5 times that of the shallow well, the pressure consumption of the system is large, and the depth cannot be reached by adopting clean water and a conventional spray head. And the coiled tubing equipment of the shallow well is not suitable for the pressure loss requirement and the acid resistance of the deep well.
Accordingly, there is a need for a radial bore completion method and system for deep wells. FIG. 1 shows a flow diagram of a radial bore completion method for a deep well according to one embodiment of the present invention.
In step S101, a pipe with a diverter at the bottom is lowered to a target interval of a deep well. In order to effectively utilize the reservoir bodies in the seam holes around the well, a pipeline with a diverter at the bottom is required to be firstly lowered to a target interval so as to communicate the reservoir bodies through working fluid. The method shown in figure 1 can be applied in a well without casing, eliminating the windowing step and drilling directly in the open hole, as compared to a cased well.
Next, in step S102, the orientation of the storage volume within the target interval is determined, and the target direction of the steering gear is determined based on the orientation. In this step, the orientation of the reservoir within the interval of interest may be determined by the positioning device, and then the diverter may be rotated according to the orientation of the reservoir such that the diverter is oriented to face the reservoir. According to one embodiment of the invention, the orientation of the reservoir within the interval of interest may be determined by a high temperature deep well directional gyroscope.
Then, in step S103, the pipe is fixed. According to one embodiment of the invention, a pipe anchor on a pipe may be hung to secure the pipe.
Finally, in step S104, the infusion tube is lowered from the inside of the tube to the target interval, and a working fluid is pumped into the infusion tube to communicate with the reservoir. In order to inject the working fluid into the open hole to communicate with the reservoir, a fluid delivery conduit is required to run down the conduit from the interior of the conduit to the interval of interest. The working fluid is then pumped, where a jet pump may be used to pump the working fluid. The jet pump is used for pumping working fluid to the infusion pipeline. Hydrochloric acid can be used as working solution, acid reacts with limestone, no sand is deposited at the bottom of the well, and washing operation is omitted.
the method and the system for completing the deep well by the radial drilling can solve the problem of rock breaking of the deep well rock through the working fluid and the infusion pipeline, optimize the pressure loss and the friction force of the system so as to achieve the purpose of footage, and can also determine the orientation of a storage body in a target layer section through the positioning device.
FIG. 2 shows a flow diagram of a method for radial bore completion of a deep well according to another embodiment of the present invention.
in step S201, a fluid delivery pipe with a high pressure hose at the bottom is lowered from the inside of the pipe to the target interval. According to one embodiment of the invention, in a 6500m deep well hard straight limestone reservoir, a liquid conveying pipeline with a high-pressure hose at the bottom can be lowered from the inside of the pipeline to a target interval.
In one embodiment, the high pressure hose can be a high pressure hose with high temperature resistance, low friction and low pressure loss, which can work normally at 150 ℃ in the well, and has a smaller friction force with the hole, so as to meet the self-feeding requirement of the nozzle.
Next, in step S202, when the infusion tube is lowered to the upper end of the steering gear, the working fluid is pumped into the infusion tube. According to an embodiment of the invention, the system may further comprise a jet pump for pumping the working fluid to the high pressure hose. Hydrochloric acid can be used as working solution, acid reacts with limestone, no sand is deposited at the bottom of the well, and washing operation is omitted.
finally, in step S203, the nozzle of the high-pressure hose head carries the high-pressure hose into the bottom layer under the action of self-feeding force until communicating with the reservoir. According to one embodiment of the invention, the nozzle is arranged at the head of the high-pressure hose, the nozzle can be a hard limestone high-efficiency rock breaking nozzle, the acid resistance is good, the rock breaking rate of 6500m of limestone in the well can reach 3m/h under the acid liquor condition, the mechanical design is balanced, the drilling track can be kept regular, smooth and straight, and the aperture is about 50 mm.
The invention can realize the targeted communication of the unconsumed reservoir bodies of the deep well oil reservoir and the high-efficiency utilization around the well. For example, the target communication of unconsumed reservoirs of 6500m deep well hard limestone oil reservoirs and the high-efficiency exploitation around the wells are realized.
FIG. 3 shows a block diagram of a radial bore completion system for a deep well according to one embodiment of the present invention. As shown in FIG. 3, the system includes a tube 301, a positioning device 302, a fixation device 303, and an infusion tube 304.
The bottom of the pipeline 301 is provided with a diverter that needs to be carried down to the interval of interest. According to one embodiment of the present invention, the system provided in fig. 3 can be applied in a deep well without casing, eliminating the windowing step and drilling directly in the open hole.
In addition, the positioning device 302 is used to determine the orientation of the reservoir within the interval of interest. According to an embodiment of the present invention, the positioning device 302 may be a high temperature deep well directional gyroscope, which can work at a high temperature of 150 degrees celsius, and the working precision error is within 10 °.
The fixture 303 is used to secure the pipe. According to one embodiment of the invention, the conduit 301 may be tubing and the fixture 303 may be a tubing anchor that secures the tubing by setting the tubing anchor.
The infusion line 304 is used to pump the working fluid into the infusion line from the interior of the line down to the interval of interest to communicate with the reservoir. According to one embodiment of the invention, the fluid delivery conduit 304 may be a coiled tubing that is run down the conduit to the interval of interest to communicate with the reservoir via the pumped working fluid.
According to one embodiment of the invention, the coiled tubing is fitted with a high pressure hose at the bottom. The high-pressure hose can be a high-pressure hose with high temperature resistance, low friction and low pressure consumption, can normally work at the temperature of 150 ℃ underground, has smaller friction force with the hole, and meets the self-feeding requirement of the nozzle.
According to one embodiment of the invention, the nozzle is arranged at the head of the high-pressure hose, the nozzle can be a hard limestone high-efficiency rock breaking nozzle, the acid resistance is good, the rock breaking rate of 6500m of limestone in the well can reach 3m/h under the acid liquor condition, the mechanical design is balanced, the drilling track can be kept regular, smooth and straight, and the aperture is about 50 mm.
According to an embodiment of the invention, the system may further comprise a jet pump for pumping the working fluid to the high pressure hose. Hydrochloric acid can be used as working solution, acid reacts with limestone, no sand is deposited at the bottom of the well, and washing operation is omitted.
FIG. 4 shows a block diagram of a radial bore completion system for a deep well according to another embodiment of the present invention. As shown in fig. 4, the system comprises tubing 401, a high pressure deep well directional gyroscope 402, a tubing anchor 403, coiled tubing 404, a diverter 405, a high pressure hose 406, a nozzle 407, and a jet pump 408.
The current radial water jet technology is limited to cased wells with 3800m well depth and medium soft sandstone, and the following problems exist in carbonate reservoirs with 6500m depth:
1) The deep well has harder rock, the compressive strength of the deep well is more than 5 times of that of the shallow well, the pressure consumption of the system is larger, and the footage cannot be obtained by adopting clean water and a conventional spray head.
2) The existing tool is not acid-resistant and has no high-temperature and high-pressure resistance.
3) The coiled tubing equipment of shallow wells is not suitable for the pressure consumption requirement and the acid resistance of deep wells.
4) the well bore size of shallow wells is small and the existing tools do not meet the larger open hole of deep wells.
Therefore, the system shown in fig. 4 is provided, is applied to a 6500m deep well hard limestone open hole, and adopts acid liquor to carry out radial injection to drill a multi-branch hole which is perpendicular to a shaft and has the length of 50-100m and the diameter of 50mm, so as to achieve the purpose of well completion method for efficiently using around the well and communicating with a reservoir in a targeted manner.
The system shown in figure 4 eliminates the windowing step and the borehole is drilled directly in the open hole as compared to a cased hole. And compared with sandstone, can adopt hydrochloric acid as the working solution, the reaction takes place between acid and limestone, there is no sand setting at the bottom of the well, has saved and washed the operation.
In addition, compared with the clastic rock reservoir, the system shown in fig. 4 is mainly used for target communication and three-dimensional communication of reservoir bodies to form network coverage, and acid etching can transform or unblock a near wellbore zone to a certain extent.
The nozzle 407 can be a hard limestone high-efficiency rock breaking nozzle, has good acid resistance, can enable the rock breaking rate of 6500m underground limestone to reach 3m/h under the acid liquor condition, has balanced mechanical design, and can keep the drilling track to be regular, smooth and straight, and the aperture is about 50 mm.
According to one embodiment of the invention, the high-pressure hose can adopt a high-pressure hose with high temperature resistance, low friction and low pressure loss, so that the high-pressure hose can normally work at 150 ℃ underground, the friction force between the high-pressure hose and a hole is smaller, and the self-feeding requirement of the nozzle is met.
According to one embodiment of the invention, the steering gear can adopt a low-friction acid-resistant steering gear, the requirement of 149.7mm or 165.1mm naked eye running is met, the friction force between the high-pressure hose and the high-pressure hose is small, and the self-advancing force requirement of the nozzle is met.
In addition, the high-temperature deep well directional gyroscope can meet the requirement of high-temperature directional operation at 150 ℃, and the precision error is within 10 degrees.
the steps for communicating the reservoir through the system shown in FIG. 4 are: firstly, an oil pipe with a steering gear at the bottom is lowered to a target layer section, and a tubing anchor is hung after the orientation of the oil pipe is determined by a gyroscope. Then, the bottom of the lower coiled tubing is provided with a high-pressure hose and a rock breaking nozzle, when the lower coiled tubing is lowered to the upper end of the steering gear, acid liquor pumping is adopted, and the nozzle drives the hose to enter the open hole stratum under the action of self-feeding force until communicating with a reservoir body.
The radial hydraulic drilling is carried out by adopting acid liquor, so that the problem of high-efficiency rock breaking of the hard limestone of the deep well can be solved, and the targeted and three-dimensional communication of the reservoir body is realized. The purpose of releasing the difficult-to-use reservoir body and greatly improving the reserve utilization degree is achieved.
The method and the system for completing the deep well by the radial drilling can solve the problem of rock breaking of the deep well rock through the working fluid and the infusion pipeline, optimize the pressure loss and the friction force of the system so as to achieve the purpose of footage, and can also determine the orientation of a storage body in a target layer section through the positioning device. The invention can realize the targeted communication of the unconsumed reservoir bodies of the deep well oil reservoir and the high-efficiency utilization around the well. For example, the target communication of unconsumed reservoirs of 6500m deep well hard limestone oil reservoirs and the high-efficiency exploitation around the wells are realized.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures, process steps, or materials disclosed herein but are extended to equivalents thereof as would be understood by those ordinarily skilled in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. a method of radial bore completion for a deep well, the method comprising the steps of:
Lowering the pipeline with the diverter at the bottom to the target interval of the deep well;
Determining the position of a storage body in the target layer section, and determining the target direction of the steering gear according to the position;
Fixing the pipeline;
And (3) descending a liquid conveying pipeline from the interior of the pipeline to the target interval, and pumping working fluid into the liquid conveying pipeline to communicate with the reservoir body.
2. the method of radial bore completion for a deep well of claim 1, wherein the orientation of the reservoir within the interval of interest is determined by a high temperature deep well directional gyroscope.
3. The method of radial bore completion for a deep well according to claim 1, wherein the step of securing the tubing comprises the steps of:
And sitting and hanging a pipeline anchor on the pipeline to fix the pipeline.
4. The method of claim 1, wherein the step of lowering a fluid delivery conduit from the interior of the conduit to the interval of interest and pumping a working fluid into the fluid delivery conduit to communicate with the reservoir comprises the steps of:
And (3) a liquid conveying pipeline with a high-pressure hose at the bottom is lowered to the target layer section from the interior of the pipeline, when the liquid conveying pipeline is lowered to the upper end of the steering gear, the working liquid is pumped into the liquid conveying pipeline, so that the nozzle at the head of the high-pressure hose carries the high-pressure hose into the stratum under the action of self-feeding force until the nozzle is communicated with a reservoir body.
5. The method of radial bore completion for a deep well of claim 1, wherein the working fluid is hydrochloric acid.
6. A radial bore completion system for a deep well, the system comprising:
A duct with a diverter at its bottom;
a positioning device for determining the orientation of the reservoir within the interval of interest;
a fixing device for fixing the pipe;
And the infusion pipeline is used for pumping working fluid into the infusion pipeline from the interior of the pipeline to the target interval so as to communicate with a reservoir body.
7. The radial bore completion system for a deep well of claim 6, wherein the positioning device is a high temperature deep well directional gyroscope.
8. The radial bore completion system for a deep well of claim 6, wherein the fixation device is a tubing anchor.
9. The radial bore completion system for a deep well of claim 6, further comprising: the high-pressure hose is installed at the bottom of the infusion pipeline, the head of the high-pressure hose is provided with a nozzle, and when the working fluid is pumped into the infusion pipeline, the nozzle carries the high-pressure hose to enter a stratum under the action of self-feeding force until communicating with a reservoir body.
10. the radial bore completion system for a deep well of claim 6, further comprising: and the jet pump is used for pumping the working fluid to the infusion pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563582.2A CN110552617B (en) | 2018-06-04 | 2018-06-04 | Radial drilling completion method and system for deep well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563582.2A CN110552617B (en) | 2018-06-04 | 2018-06-04 | Radial drilling completion method and system for deep well |
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| Publication Number | Publication Date |
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| CN110552617A true CN110552617A (en) | 2019-12-10 |
| CN110552617B CN110552617B (en) | 2022-10-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660391A (en) * | 2008-08-29 | 2010-03-03 | 中国石油天然气集团公司 | Radial horizontal drilling device |
| CN102155187A (en) * | 2011-03-22 | 2011-08-17 | 上海宏睿油气田径向井技术服务有限公司 | Method for treating coal bed bottom plate karst water through hydraulic jetting and radial drilling |
| CN202596579U (en) * | 2012-04-13 | 2012-12-12 | 中国石油天然气集团公司 | Device reducing annular confining pressure at bottom of well and improving rock breaking efficiency of horizontal well |
| CN105089500A (en) * | 2015-09-11 | 2015-11-25 | 重庆大学 | Coal mine downhole hydraulic jet tree-shaped drill hole way-type drilling unit |
-
2018
- 2018-06-04 CN CN201810563582.2A patent/CN110552617B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660391A (en) * | 2008-08-29 | 2010-03-03 | 中国石油天然气集团公司 | Radial horizontal drilling device |
| CN102155187A (en) * | 2011-03-22 | 2011-08-17 | 上海宏睿油气田径向井技术服务有限公司 | Method for treating coal bed bottom plate karst water through hydraulic jetting and radial drilling |
| CN202596579U (en) * | 2012-04-13 | 2012-12-12 | 中国石油天然气集团公司 | Device reducing annular confining pressure at bottom of well and improving rock breaking efficiency of horizontal well |
| CN105089500A (en) * | 2015-09-11 | 2015-11-25 | 重庆大学 | Coal mine downhole hydraulic jet tree-shaped drill hole way-type drilling unit |
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| CN110552617B (en) | 2022-10-11 |
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