CN204371101U - A kind of hydraulic power three grades of expansion coal bed gas make cave instrument - Google Patents
A kind of hydraulic power three grades of expansion coal bed gas make cave instrument Download PDFInfo
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- CN204371101U CN204371101U CN201420794206.1U CN201420794206U CN204371101U CN 204371101 U CN204371101 U CN 204371101U CN 201420794206 U CN201420794206 U CN 201420794206U CN 204371101 U CN204371101 U CN 204371101U
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Abstract
The utility model provides a kind of hydraulic power three grades of expansion coal bed gas and makes cave instrument.This instrument comprises top connection, main shaft rotary system, level make cave system three part.Main shaft rotary system can promote self to rotate broken rock by the moment that the jetting of high-pressure spray passage produces.Meanwhile, main shaft rotary system is also included in the assisted jet system of tool lower portion, carrys out auxiliary spindle rotary system and rotates broken rock.Level is made cave system and is divided into three grades of extension type drill bits, is launched step by step and the broken rock of self rotation of the moment produced by jetting promotion by hydraulic pressure.Promote by waterpower the rotation that the main shaft rotary system of instrument and level make cave system, make the rotation of both direction cooperatively interact and form feedback mechanism, thus side direction is launched to carry out making cave step by step.This tool operation is easy to be easy to control, making in cave the stability maintaining the borehole wall, can prevent cave-in, produces the cave of comparatively rule, can also be applied to the expanding operation on necking down stratum.
Description
Technical field
The utility model relates to a kind of coal bed gas well and makes corollary apparatus in the operation of cave, and specifically a kind of hydraulic power three grades of expansion coal bed gas make cave instrument.
Background technology
Cbm development is the emphasis of China's energy development.Because the output of coal bed gas straight well exploitation differs too large with Expected Results, " U-shaped well " connection technology is widely used in cbm development, and namely horizontal well and mining well two mouthfuls of well wells are interconnected.In " U-shaped well " connection technology, gone to be communicated with mining well well by horizontal well well.For ensureing connected probability, needing to expand hole diameter in the connectivity part of mining well design and making cave.In addition, in drillng operation, run into enter instrument under necking down stratum also needs and carry out expanding operation.Coal bed gas well caving completion mode also needs to make cave operation.At present conventional cave method of making has three kinds, is respectively that negative pressure makes cave, hydraulic jet makes cave and machine tool makes cave.But from effect, negative pressure makes cave complex process equipment, and technical requirements is high, operation easier is large, and danger coefficient is large; Jet makes cave technology cannot accurately obtain cave diameter, and technological parameter is uncontrollable; Machine tool makes that cave size is little, and intensity is low, and is easily stuck in underground, cannot ensure the stability of the borehole wall.According to new theory, have devised a kind of hydraulic power three grades of expansion coal bed gas and make cave instrument, is make the efficiency of cave operation to improving coal bed gas well or be all extremely important to the reliability ensured in cbm development process.
Summary of the invention:
The purpose of this utility model to provide a kind of hydraulic power three grades of expansion coal bed gas to make cave instrument, this tool needle makes the defect of cave technology existence to existing coal bed gas, there is provided a kind of easy and simple to handle, safe and reliable, the cave of setting diameter can be produced, and the stability on stratum can be ensured, improve efficiency and the reliability of coal bed gas well exploitation.
The purpose of this utility model realizes by following technical scheme:
A kind of hydraulic power three grades of expansion coal bed gas make cave instrument, mainly comprise top connection, main shaft rotary system, horizontally rotate system, top connection top has the screw thread of combining closely with drilling rod, bottom is connected with main shaft rotary system by rolling bearing, main shaft rotary system upper position is uniformly distributed three high-pressure spray passages, be fluid course in the middle of main shaft, connect drilling rod inner passage outside fluid course upper end, be communicated with high-pressure spray passage from top to bottom respectively, horizontally rotate system liquid circulation road and assisted jet passage.Medium position connection horizontally rotates system, it has three grades of drill bits, the drill bit of internal minimum inner diameter is one-level drill bit, radius increases successively and is respectively secondary and three grades of drill bits, every one-level drill bit is divided into rotating bottom board, spring, drill bit three part, spring one end connects drill bit, on the spacing rolling bearing of other end connection encapsulation on main shaft rotary system, one-level rotating bottom board is stuck between secondary base plate and main shaft, joining place is rolling bearing, secondary rotating bottom board is stuck between three grades of base plates and one-level base plate, joining place is rolling bearing, three grades of rotating bottom boards are stuck between main shaft and secondary base plate, joining place is rolling bearing, horizontally rotate system, during every one-level bit, the moment of torsion relying on drill bit to drive spring to be formed drives the spacing rolling bearing annulus be encapsulated on main shaft rotary system to rotate.Chisel edge at different levels is all provided with spiral jet passage, and when fluid is by this fluidic channel, the moment produced orders about the axle rotation of this grade of drill bit along oneself.Main shaft rotary system internal main fluid course has main shaft spring, spring one end is fixed on bottom main shaft, one end linking springs plug, main shaft rotary system lower position is uniformly distributed three assisted jet passages and corresponding three additional jet flow passages, assisted jet passage, inside has additonal pressure spring and spring plug, play the function regulating assisted jet passage switching according to pressure, and main shaft spring failure can be prevented to cause instrument normally to work, when hydraulic pressure increases to a certain degree, spring is pressed off, additional jet flow passage is opened, fluid is gone out by additional jet flow channel injection.The medium position of assisted jet passage is connected with additional jet flow passage, and assisted jet channel interior has additonal pressure spring and spring plug, plays the function regulating assisted jet passage switching according to pressure.High-pressure spray passage and assisted jet passage are uniformly distributed three spiral jet passages in the horizontal direction, and fluid penetrates from this passage, and the moment produced is ordered about main shaft and rotated.
During tool work, cleaner for high-pressure drilling fluid enters from fluid course and makes cave instrument, and main shaft rotary system is driven by the moment that the jetting of high-pressure spray passage produces and self rotates; Liquid flows through horizontal fluid course and the spiral jet channel connection crossing one-level rotary drilling-head, from fluidic channel inject high pressure fluid, produces moment and drives one-level rotary drilling-head to rotate.After one-level rotary drilling-head all stretches, the fluid course of one-level and two-level spin system is opened, liquid flows to into secondary rotary drilling-head, from the spiral jet channel injection high-pressure fluid of secondary rotary drilling-head, produce moment and drive secondary to rotate bit, after secondary rotary drilling-head all launches, and then the fluid course of secondary and three grades of rotary systems is opened, liquid flows to into three grades of rotary drilling-heads, the fluidic channel inject high pressure fluid of three grades of rotary drilling-heads, produces active force and drives three grades of rotary drilling-heads to rotate.
When the system of horizontally rotating be subject to resistance cannot launch time, its three grades of expansion are restricted, thus to make in main shaft fluid course hydraulic pressure increase.Hydraulic pressure increase can make main shaft high-pressure spray channel velocity increase, thus main shaft rotates acceleration, and main shaft spring plug moves down simultaneously, additional jet flow passage spring plug is pressed off, assisted jet passage is opened, and now high-pressure spray passage and assisted jet passage inject high pressure fluid simultaneously, accelerates main shaft and rotate.When the main shaft circumgyration incision borehole wall makes horizontal direction obtain greater room, horizontal drill bit continues to launch, and main shaft fluid course pressure reduces, and additional fluidic channel is closed.Thus main shaft rotary system and the system that horizontally rotates form feedback mechanism, work in coordination.After cave is caused, reduce the fluid pressure injected, the three grades of drill bits horizontally rotating system are retracted by spring contraction, and main shaft spring plug also gets back to initial position because the fluid pressure value be subject to reduces.
The beneficial effects of the utility model are: (1) operates this instrument and only need control pump pressure well and just can realize all operations, simple and easy to operate; (2) this tool system is rotary structure, and easy to process, structure is simple, stable performance; (3) system that horizontally rotates is divided into three grades, and three grades of expansive bits launch step by step, does not need to strut as conventional cave making tool, can reach and make the stable object in cave, can keep the stability of the borehole wall; (4) instrument build-up process is all rotary structure rotary motion, and structural strength is high, stress equalization.And drill bit retractable, according to stressed self-control position.Thus it is not tool construction is reliable, easily damaged, high life; (5) make cave process smooth-going, cave-in possibility is little.Meanwhile, make cave complete after system horizontal shrink back under the action of the spring in instrument.Thus instrument there will not be the situation blocked and can not get, operate reliable and secure; (6) spring be connected with drill bit can play the effect of damper, can reduce the harm that frequent vibration produces, greatly extend life tools when system works; (7) by main shaft rotary system with horizontally rotate system and cooperatively interact, controlled by parameters such as the main shaft hydraulic pressure sizes of borehole wall stress, supply, form degenerative mechanism, better maintain the wellbore stability in drilling process, make to make cave process more steady; (8) by the borehole wall pressure that test is different, the spring strength of the spring of required main shaft spring and horizontal development system can be calculated, be adapted to the borehole wall of different coal bed gas by the spring loading varying strength; (9) instrument can directly be connected on drill string, compact volume and convenience, can be used for the expanding operation of the borehole wall of easy undergauge, has vast potential for future development.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the non-deployed condition of entirety of the present invention;
Fig. 2 is the structural representation of the present invention's one-level deployed condition when working;
Fig. 3 is the structural representation of the present invention's secondary deployed condition when working;
Fig. 4 is the structural representation of the present invention's three grades of deployed conditions when working;
Fig. 5 is that partial cutaway schematic is looked on a left side of the present invention;
Fig. 6 is that this cave making tool level makes cave system level system architecture schematic diagram;
Fig. 7 is that this cave making tool level makes cave system level two structural representation;
Fig. 8 is that this cave making tool level makes cave system three-level system structural representation;
Fig. 9 is that this cave making tool level makes the rear overall structure schematic diagram of one, two, three assembling of cave system;
Figure 10 is that this cave making tool level makes cave system level system A-A generalized section;
Figure 11 is that this cave making tool level makes cave system level system B-B generalized section;
Figure 12 is that this cave making tool level makes cave system level system C-C generalized section;
Figure 13 is the generalized section at this cave making tool main shaft D-D place;
Figure 14 is the generalized section at this cave making tool main shaft E-E place;
Figure 15 is the structural representation that this cave making tool level makes the hydraulic jet passage of cave system level system drill bit;
Figure 16 is the structural representation that this cave making tool level makes the hydraulic jet passage of cave system level two drill bit;
Figure 17 is the structural representation that this cave making tool level makes the hydraulic jet passage of cave system three-level system drill bit;
In figure: 1-top connection; 2-fluid course; 3-rolling bearing; 4-main shaft rotating jet passage; 5-main shaft spring plug; The rolling bearing of 6-three grades of rotary drilling-heads and main shaft; The rolling bearing of 7-secondary and three grades of rotary drilling-heads; The rolling bearing of 8-one-level and secondary rotary drilling-head; 9-three grades of rotary drilling-heads; 10-secondary rotary drilling-head; 11-one-level rotary drilling-head; 12-horizontal fluid course; The fluidic channel of 13-secondary rotary drilling-head; The fluidic channel of 14-three grades of rotary drilling-heads; The fluidic channel of 15-one-level rotary drilling-head; 16-additional jet flow passage spring plug; 17-additional jet flow passage; 18-additonal pressure spring and spring channels; 19-main shaft spring; 20-main shaft; The fluid course of 21-one-level and two-level spin system; The fluid course of 22-secondary and three grades of rotary systems; 23-three grades of rotating bottom board rolling bearings; The spring of 24-control, three grades of rotation expansion and contraction; 25-secondary rotating bottom board rolling bearing; The spring of 26-control secondary rotation expansion and contraction; 27-one-level rotating bottom board rolling bearing; The spring of 28-control one-level rotation expansion and contraction; 29-one-level rotating bottom board; 30-secondary rotating bottom board; 31-three grades of rotating bottom boards.
Described hydraulic power three grades of expansion coal bed gas make cave instrument, can produce the cave that diameter is 0.68m.Instrument total length 2m, top connection total length 500mm.Main shaft upper part is with 3 fluidic channel, and lower part is with three assisted jet passages.Level three grades of every one-levels of drill bit are with 3 fluidic channel.Fluidic channel diameter is 10mm.Major axis diameter 210mm, tertiary effluent flat drill head (9) (10) (11) horizontal direction spread length is respectively 70mm, 80mm, 90mm, Primary plateaus bit diameter 30mm, the horizontal bit diameter 90mm of secondary, the flat bit diameter 210mm of tertiary effluent.
Detailed description of the invention:
Below in conjunction with accompanying drawing 1-17, the invention will be further described:
The present invention proposes a kind of hydraulic power three grades of expansion coal bed gas and makes cave instrument: can produce the cave that diameter is 0.68m, and easy to operate and safe, can keep the stability on stratum.
Stratum is entered under instrument:
Make cave instrument and be connected to drilling rod by top connection, under enter object stratum, level of control rotary system aim at make cave target spot, cave making tool is in non-deployed condition, as shown in Figure 1.
Three grades of expansion processes:
High-pressure fluid is passed in fluid course 2, main shaft spring plug 5 is pulled to horizontal fluid course less than 12, main shaft fluidic channel 4 is all opened with horizontal fluid course 12 and is communicated with main fluid course 2, main shaft fluidic channel 4 inject high pressure fluid, the active force produced drives main shaft circumgyration incision stratum, liquid flows through horizontal fluid course 12 and is communicated with the helical form fluidic channel 15 crossing one-level rotary drilling-head 11, thus fluidic channel inject high pressure fluid, producing active force drives one-level rotary drilling-head 11 to rotate, as shown in Figure 2.
After one-level rotary drilling-head 11 all stretches, the fluid course 21 of one-level and two-level spin system is opened, liquid flows to into secondary rotary drilling-head 10, thus the fluidic channel 13 inject high pressure fluid of secondary rotary drilling-head, produce active force and drive secondary rotary drilling-head 10 to rotate.After secondary rotary drilling-head 10 all launches, and then the fluid course 22 of secondary and three grades of rotary systems is opened, and liquid flows to into three grades of rotary drilling-heads 9.The fluidic channel 14 inject high pressure fluid of three grades of rotary drilling-heads, produces active force and drives three grades of rotary drilling-heads 9 to rotate, shown in Fig. 2 Fig. 3.
Feedback mechanism:
Launch blocked rotation when horizontally rotating drill bit, its fluidic channel cannot be opened, thus hydraulic pressure in main shaft fluid course 2 is increased.Hydraulic pressure increase can make main shaft fluidic channel 4 flow velocity increase, main shaft 20 spin even faster.Main shaft spring plug 5 moves down under hydraulic drive simultaneously, and additional jet flow passage 17 is communicated with fluid course 2, and main shaft fluidic channel 4 and additional jet flow passage 17 inject high pressure fluid simultaneously, accelerates main shaft and rotate.When the main shaft circumgyration incision borehole wall makes horizontal direction obtain greater room, horizontal drill bit continues to launch to rotate, and main shaft fluid course 2 pressure reduces, and assisted jet passage 17 is closed.Thus main shaft rotary system and the system that horizontally rotates form feedback mechanism, work in coordination.
Make cave to complete:
When tertiary effluent flat drill head all launches, make cave and complete, as shown in Figure 4.Stop pumping into high-pressure fluid, the system that horizontally rotates is under the pulling force of horizontal spring in income instrument, and instrument can rise and be raised to ground, and operation completes.
Claims (5)
1. a hydraulic power three grades of expansion coal bed gas make cave instrument, mainly comprise top connection, main shaft rotary system, horizontally rotate system, it is characterized in that: top connection top has the screw thread of combining closely with drilling rod, bottom is connected with main shaft rotary system by rolling bearing, main shaft rotary system upper position is uniformly distributed three high-pressure spray passages, medium position connection horizontally rotates system, it has three grades of drill bits, the drill bit of internal minimum inner diameter is one-level drill bit, radius increases successively and is respectively secondary and three grades of drill bits, every one-level drill bit is divided into rotating bottom board, spring, drill bit three part, spring one end connects drill bit, on the spacing rolling bearing of other end connection encapsulation on main shaft rotary system, one-level rotating bottom board is stuck between secondary base plate and main shaft, joining place is rolling bearing, secondary rotating bottom board is stuck between three grades of base plates and one-level base plate, joining place is rolling bearing, three grades of rotating bottom boards are stuck between main shaft and secondary base plate, joining place is rolling bearing, main shaft rotary system internal main fluid course has main shaft spring, spring one end is fixed on bottom main shaft, one end linking springs plug, main shaft rotary system lower position is uniformly distributed three assisted jet passages and corresponding three additional jet flow passages, the medium position of assisted jet passage is connected with additional jet flow passage, assisted jet channel interior has additonal pressure spring and spring plug, play the function regulating assisted jet passage switching according to pressure.
2. hydraulic power three grades of expansion coal bed gas make cave instrument as claimed in claim 1, it is characterized in that: described main shaft rotary system, centre is fluid course, connect drilling rod inner passage outside fluid course upper end, be communicated with high-pressure spray passage from top to bottom respectively, horizontally rotate system liquid circulation road and assisted jet passage.
3. hydraulic power three grades of expansion coal bed gas make cave instrument as claimed in claim 1, it is characterized in that: described high-pressure spray passage and assisted jet passage are uniformly distributed three spiral jet passages in the horizontal direction.
4. hydraulic power three grades of expansion coal bed gas make cave instrument as claimed in claim 1, it is characterized in that: described assisted jet passage, inside has additonal pressure spring and spring plug, play the function regulating assisted jet passage switching according to pressure, and main shaft spring failure can be prevented to cause instrument normally to work, when hydraulic pressure increases to a certain degree, spring is pressed off, additional jet flow passage is opened, and fluid is gone out by additional jet flow channel injection.
5. hydraulic power three grades of expansion coal bed gas make cave instrument as claimed in claim 1, it is characterized in that: described in horizontally rotate system, during every one-level bit, the moment of torsion relying on drill bit to drive spring to be formed drives the spacing rolling bearing annulus be encapsulated on main shaft rotary system to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420794206.1U CN204371101U (en) | 2014-12-12 | 2014-12-12 | A kind of hydraulic power three grades of expansion coal bed gas make cave instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420794206.1U CN204371101U (en) | 2014-12-12 | 2014-12-12 | A kind of hydraulic power three grades of expansion coal bed gas make cave instrument |
Publications (1)
| Publication Number | Publication Date |
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| CN204371101U true CN204371101U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420794206.1U Expired - Fee Related CN204371101U (en) | 2014-12-12 | 2014-12-12 | A kind of hydraulic power three grades of expansion coal bed gas make cave instrument |
Country Status (1)
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| CN (1) | CN204371101U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109184728A (en) * | 2018-10-30 | 2019-01-11 | 浙江科技学院 | The vertical combined type multidimensional of flank-for soft or hard stratum freezes drilling method |
| CN109268025A (en) * | 2018-10-30 | 2019-01-25 | 浙江科技学院 | The vertical combined type multidimensional of flank-for soft or hard stratum freezes cutting arrangement |
| CN111810052A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Coal seam hydraulic reaming drilling tool and reaming process |
| CN111810086A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Front-end power type hydraulic large-diameter grading cave-making pressure-relief permeability-increasing device and method |
| CN113187536A (en) * | 2021-04-21 | 2021-07-30 | 山东科技大学 | Retreating type coal seam hydraulic reaming cave-making permeability-increasing device and permeability-increasing method |
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2014
- 2014-12-12 CN CN201420794206.1U patent/CN204371101U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184728A (en) * | 2018-10-30 | 2019-01-11 | 浙江科技学院 | The vertical combined type multidimensional of flank-for soft or hard stratum freezes drilling method |
| CN109268025A (en) * | 2018-10-30 | 2019-01-25 | 浙江科技学院 | The vertical combined type multidimensional of flank-for soft or hard stratum freezes cutting arrangement |
| CN109184728B (en) * | 2018-10-30 | 2020-07-24 | 浙江科技学院 | Side wing-vertical combined type multi-dimensional freezing drilling and cutting method for soft and hard stratum |
| CN111810052A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Coal seam hydraulic reaming drilling tool and reaming process |
| CN111810086A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Front-end power type hydraulic large-diameter grading cave-making pressure-relief permeability-increasing device and method |
| CN111810086B (en) * | 2020-06-12 | 2022-04-08 | 中煤科工集团沈阳研究院有限公司 | Front-end power type hydraulic large-diameter grading cave-making pressure-relief permeability-increasing device and method |
| CN113187536A (en) * | 2021-04-21 | 2021-07-30 | 山东科技大学 | Retreating type coal seam hydraulic reaming cave-making permeability-increasing device and permeability-increasing method |
| CN113187536B (en) * | 2021-04-21 | 2022-07-19 | 山东科技大学 | Retreating type coal seam hydraulic reaming cave-making permeability-increasing device and permeability-increasing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20151212 |
|
| EXPY | Termination of patent right or utility model |