CN109184571A - A kind of horizontal directional drill injector formula reacting cycle reamer and system - Google Patents
A kind of horizontal directional drill injector formula reacting cycle reamer and system Download PDFInfo
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- CN109184571A CN109184571A CN201811360548.1A CN201811360548A CN109184571A CN 109184571 A CN109184571 A CN 109184571A CN 201811360548 A CN201811360548 A CN 201811360548A CN 109184571 A CN109184571 A CN 109184571A
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- horizontal directional
- reamer
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- directional drilling
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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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
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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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (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)
- Earth Drilling (AREA)
Abstract
本发明提供一种水平定向钻用引射器式反循环扩孔器及系统，包括本体、环设于所述本体的若干牙轮钻头、设于所述本体前端的扩径段和设于所述本体后端的扩散管，所述扩径段的前端设有扩孔器头部，所述扩孔器头部用于通过一钻杆向前与泥浆泵连接，所述扩散管用于通过另一钻杆向后与出土端泥浆池连接，所述扩径段的侧壁上环设有与外界连通且与所述牙轮钻头一一对准的若干清洗喷孔，所述扩径段的后端设有喷嘴，所述扩径段与所述本体之间设有与外界连通的若干吸渣孔，所述本体内设有与所述扩散管连通的混合管，所述吸渣孔和所述喷嘴与所述混合管连通。
The present invention provides an ejector type reverse circulation reamer and system for horizontal directional drilling, comprising a main body, a plurality of roller cone bits arranged around the main body, a diameter expansion section arranged at the front end of the main body, and a The diffuser pipe at the rear end of the main body, the front end of the diameter expansion section is provided with a reamer head, the reamer head is used to connect forward with a mud pump through a drill pipe, and the diffuser pipe is used to pass another drill pipe. The drill pipe is connected to the mud pool at the unearthed end, and the upper ring of the side wall of the expanding section is provided with several cleaning nozzle holes that communicate with the outside world and are aligned with the roller cone bits one by one. There is a nozzle at the end, a number of slag suction holes communicated with the outside are arranged between the expanding section and the body, a mixing pipe communicated with the diffusion pipe is arranged in the body, and the slag suction holes and the The nozzle communicates with the mixing tube.
Description
Technical field
The present invention relates to horizontal directional drilling technology fields more particularly to a kind of horizontal directional drill injector formula reacting cycle to expand
Hole device.
Background technique
In recent years, it is sent etc. in state keys pipe-line construction engineering in the second west to east gas pipeline project, river gas east, large diameter pipeline construction
Gradually increase, horizontal directional drilling technology is increasingly being used for large diameter pipeline laying work.Current heavy caliber horizontal orientation
It bores reaming construction and generally uses direct circulation reaming, is i.e. reamer is in fractured rock, the high pressure mud that is pumped by earth's surface by drilling rod
Slurry enters drilling through reamer hydrophthalmia, and the drilling cuttings cut is washed from the plane of disruption after cleaning, cooling and lubrication reamer and is taken
Annular space with drilling cuttings between drilling and drilling rod returns in earth's surface mud pit.When horizontal directional drill direct circulation reaming, with laying
Pipe diameter increases, and bore diameter increases, and annular space mud speed rate significantly reduces.Under low annular space mud speed rate, reaming landwaste is easy
Cutting bed is formed in being deposited on foot of hole, drastically reduces Cutting movement efficiency.Talus deposit may cause drilling rod because of torque mistake
It is big and be broken, pipeline because pull-back force is excessive the accidents such as is destroyed, seriously affect duration, increase construction cost.
Compared to traditional mud direct circulation mode, crossover circulation technique changes mud loop direction, the mud of cutting carring
Earth's surface is returned after entering drilling rod from annular space, Cutting movement efficiency can be increased substantially, reduces Annular Cuttings in the heap of foot of hole
Product.Crossover circulation technique has been successfully applied to the fields such as oil drilling, hydrology and water well drilling, core drilling and pile foundation engineering, and produces
Good economic benefit has been given birth to, but has not yet been applied to horizontal directional drill field.Therefore, a kind of horizontal directional drill of researching and designing is counter follows
Ring reamer, it is aobvious in the application in horizontal directional drill field, Directional Drilling reaming construction efficiency of improving the standard to promotion crossover circulation technique
It obtains most important.
Summary of the invention
In view of this, the embodiment provides a kind of horizontal directional drill injector formula reacting cycle reamer and being
System.
The embodiment of the present invention provides a kind of horizontal directional drill injector formula reacting cycle reamer, including ontology, ring are set
Several rock bit in the ontology, the extension diameter section set on the ontology front end and the diffuser set on the ontology rear end,
The front end of the extension diameter section is equipped with reamer head, and the reamer head is used to connect with slush pump forward by a drilling rod,
The diffuser is used to connect with unearthed end mud pit backward by another drilling rod, is equipped on the side wall of the extension diameter section and outside
The rear end of several cleaning spray orifices that boundary is connected to and is aligned one by one with the rock bit, the extension diameter section is equipped with nozzle, the expansion
It is equipped with several slag absorbing holes for being in communication with the outside between diameter section and the ontology, is equipped in the ontology and is connected to the diffuser
Mixing tube, the slag absorbing hole and the nozzle are connected to the mixing tube.
Further, the ontology front end is recessed with suction chamber backward, and the suction chamber is connected to the mixing tube, described
Nozzle extends rearward into the suction chamber, and the slag absorbing hole is connected to and being connected to the suction chamber with the mixing tube.
Further, between the extension diameter section and the ontology be equipped with one circle buffer part, all slag absorbing holes with it is described
Buffer part connection, and the buffer locations are in the oblique front end in the slag absorbing hole；The buffer part includes from the expanding section surface
The recessed portion being inwardly recessed, the bottom of the recessed portion are arc.
Further, the suction chamber includes front and back setting and cylindrical section interconnected and frustum section, the nozzle are worn
It crosses the cylindrical section and protrudes into the frustum section, the end of the frustum section connects the mixing tube, described in the slag absorbing hole connection
Cylindrical section.
Further, the nozzle is bore gradually tapers up from front to back frustum structure, and the cleaning spray orifice is everywhere
Aperture is identical, and the axis of the cleaning relatively described extension diameter section of spray orifice tilts backwards, the relatively described extension diameter section in slag absorbing hole
Axis turns forward, and the mutual corresponding cleaning spray orifice and the slag absorbing hole constitute "eight" shape；The slag absorbing hole is everywhere
Aperture is identical, and the aperture of the mixing tube everywhere is also identical, and the aperture in the slag absorbing hole is less than the caliber of the mixing tube；Institute
Stating diffuser is the frustum structure that bore is gradually increased from front to back.
Further, the ontology includes the uniform portion of even circumferential and the gradual change portion of circumference gradual change, the uniform portion with
Setting and interconnection before and after the gradual change portion, the outer diameter in the gradual change portion gradually becomes smaller from front to back, before the uniform portion
For end edge along tilting backwards, the rock bit is uniformly distributed in the edge, and the rock bit is conical structure, Mei Yisuo
The bottom surface and the edge for stating rock bit are parallel to each other, and the outermost of the bottom surface of the rock bit and the uniform portion
Circumference is concordant, and the end in the gradual change portion connects the diffuser.
Further, the extension diameter section, which has, thickeies side wall, and the cleaning spray orifice is extraneous through thickening side wall connection
Inside the extension diameter section, the internal diameter on the reamer head is identical as the internal diameter of the extension diameter section, the outer diameter of the extension diameter section
Greater than the outer diameter on the reamer head, while being less than the outer diameter in the uniform portion, the extension diameter section and the reamer head
It is integrally formed, the uniform portion, the gradual change portion and the diffuser are integrally formed.
Further, the reamer head, the extension diameter section, the nozzle, the mixing tube and the diffuser are total
Axis.
The embodiment of the present invention provides a kind of horizontal directional drill injector formula reacting cycle reaming system, above-mentioned including weighing
Horizontal directional drill injector formula reacting cycle reamer further includes drilling, slush pump and passes through high-pressure rubber pipe with the slush pump
The horizontal directional drilling machine of connection, the slush pump is for extracting work mud, horizontal directional drill injector formula reacting cycle
Reamer is located in the drilling, and described drill is equipped with close to one end of the horizontal directional drilling machine for providing annular space mud
It buries and holds mud pit, one end far from the horizontal directional drilling machine is equipped with the unearthed end mud for recycling the work mud
The front end in pond, horizontal directional drill injector formula reacting cycle reamer connects the horizontal directional drilling machine by a drilling rod,
Its rear end connects the unearthed end mud pit by another drilling rod.
Further, the extension diameter section diameter is less than the diameter for the drilling that will be counter-bored.
The technical solution that the embodiment of the present invention provides has the benefit that
(1) horizontal directional drill of the present invention cuts the rock bit with injector formula reacting cycle reamer and system
It cuts the landwaste of generation and passes through the drilling rod that is connect with the rear end of the horizontal directional drill injector formula reacting cycle reamer
The native end mud pit of earth's surface is returned to, since the drill pipe diameter is much smaller than bore diameter, the mud of cutting carring is in drilling rod
It is interior easily to obtain high flow rate, so that bulky grain landwaste is easily drained, reduce Annular Cuttings in the accumulation of foot of hole, substantially
Cutting movement efficiency is improved, solves the problem that major diameter horizontal directional drill annular space mud speed rate is low, and landwaste deposits.
(2) rock that horizontal directional drill injector formula reacting cycle reamer of the present invention and system generate reaming
Bits are discharged by the drilling rod that the rear end of the horizontal directional drill injector formula reacting cycle reamer is connected, due to drilling rod
Diameter is smaller, and the mud of cutting carring flow velocity in drilling rod is higher, reduces its requirement to mud suspendability, therefore to mud
Performance requirement is lower.
(3) horizontal directional drill of the present invention injector formula reacting cycle reamer and the extension diameter section diameter of system
Diameter that is larger but being less than the drilling that will be counter-bored can effectively reduce energy damage of the cleaning spray orifice jet stream in annular space
It loses, enhances drill bit cleaning effect, while the possibility that cutting landwaste is migrated to annular space can be reduced, to a certain extent generate cutting
Landwaste be enclosed between the extension diameter section and the ontology between, promote landwaste by the slag absorbing hole aspirate and enter ring reamer
It is interior, improve Annular Cuttings migration efficiency.
Detailed description of the invention
Fig. 1 is the schematic diagram of horizontal directional drill injector formula reacting cycle reamer of the present invention；
Fig. 2 is the schematic diagram of horizontal directional drill injector formula reacting cycle reaming system of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
Fig. 1 and Fig. 2 are please referred to, the embodiment provides a kind of injector formula reacting cycle reamings of horizontal directional drill
Device 6, for carrying out ream operation to drilling, the main several rock bit 12 for including ontology 20, being located on the ontology 20 are set
In the extension diameter section 11 of 20 front end of ontology and diffuser 18 set on 20 rear end of ontology.The rock bit 12 is in reaming
During for cutting ground, landwaste can be generated during cutting ground.The front end of the extension diameter section 11 is equipped with reaming
Device head 9, the reamer head 9 are used to connect with slush pump 1 forward by a drilling rod 5, and the diffuser 18 is for passing through
Another drilling rod 7 is connect with unearthed end mud pit 8 backward.
Referring to FIG. 1, the internal diameter on the reamer head 9 is identical as the internal diameter of the extension diameter section 11, the extension diameter section 11
With thickening side wall 19, thus make the outer diameter of the extension diameter section 11 greater than the outer diameter on the reamer head 9, the thickening side wall
19 outer surface is connect with the outer surface arc on the reamer head 9.
Several cleaning spray orifices 10 are connected to inside the extraneous and extension diameter section 11 through the thickening side wall 19, the cleaning spray
The aperture of hole 10 everywhere is identical, and the axis of the cleaning relatively described extension diameter section 11 of spray orifice 10 tilts backwards.Described expanding 11 sections
Rear end be equipped with nozzle, the nozzle includes front and back setting and nozzle contraction section 14 interconnected and mouth 15, the nozzle
Contraction section 14 is the frustum structure that bore gradually tapers up from front to back, and the mouth 15 is located at the end of the nozzle contraction section 14
End is circular ring structure.
The longitudal section substantially arrow tail shape of the ontology 20, the gradual change in uniform portion 21 and circumference gradual change including even circumferential
Portion 22, the uniform portion 21 and setting before and after the gradual change portion 22 and interconnection.The gradual change portion 22 be outer diameter from front to back
The end of gradually smaller circular cone structure, the gradual change portion 22 connects the diffuser 18.At the outer diameter in the uniform portion 21
Locate identical, the intermediate region of the front end in the uniform portion 21 is recessed backward forms dented space, the front end in the uniform portion 21
Edge 23 tilts backwards, 23 surfacing of edge and the surrounding for being looped around the dented space, and the rock bit 12 is
Even to be distributed in the edge 23, the rock bit 12 is conical structure, the bottom surface of each rock bit 12 with it is described
Edge 23 is parallel to each other, and the outermost of the bottom surface of the rock bit 12 is concordant with the circumference in the uniform portion 21, and described
Be equipped with mixing tube 17 in body 20, the mixing tube 17 runs through the uniform portion 21 and the gradual change portion 22, and with the diffuser
18 connections, while being connected to the nozzle.Extension diameter section 11 described in latter half is located in the dented space, the extension diameter section 11
Rear end and the dented space antetheca between be equipped with several slag absorbing holes 13 for being in communication with the outside, the center of the dented space
Region is suction chamber 16, and the suction chamber 16 includes front and back setting and cylindrical section interconnected and frustum section, the mouth 15
The frustum section is protruded into across the cylindrical section, the end of the frustum section connects and is connected to the mixing tube 17, the slag absorbing
Hole 13 is connected to and being connected to the cylindrical section with the mixing tube 17.
A circle buffer part, all slag absorbing holes 13 and the buffering are equipped between the extension diameter section 11 and the ontology 20
Portion's connection, and the buffer locations are in the oblique front end in the slag absorbing hole 13.The buffer part includes from 11 surface of extension diameter section
The recessed portion being inwardly recessed, the bottom of the recessed portion are arc.The volume of the buffer part is more than or equal to each described
The volume in slag absorbing hole 13, for by extraneous annular space mud, the work mud sprayed by the cleaning spray orifice 10 and by the tooth
The landwaste that wheel drill bit 12 is cut imports the slag absorbing hole 13, and has certain buffer function.The mouth 15 is used for
The work mud high-speed jet of high pressure is entered into the suction chamber 16 to the low pressure in 16 shape of suction chamber, thus in pressure difference
The suction chamber 16 has Involving velocity under effect, can by the slag absorbing hole 13 mud and landwaste suck and described in reaching
In mixing tube 17, work mud, annular space mud and landwaste form landwaste-mud mixing after being sufficiently mixed in the mixing tube 17
Medium, the diffuser 18 is internal diameter gradually smaller frustum structure from front to back, so as to mix the landwaste-mud
Media fraction kinetic energy is changed into pressure energy and extrudes the landwaste-mud blending agent.
Several cleaning spray orifices 10 are aligned one by one with several rock bit 12, and the rock bit 12, which is located at, to be corresponded to
The cleaning spray orifice 10 outside, the axis of the relatively described extension diameter section 11 in the slag absorbing hole 13 turns forward, mutual corresponding
The cleaning spray orifice 10 and the slag absorbing hole 13 constitute "eight" shape, and work mud a part in the extension diameter section 11 is from described
Cleaning spray orifice 10 is directed at the corresponding rock bit 12 and sprays, for rinsing and cooling down the rock bit 12, rest part
Work mud enters the suction chamber 16 from 15 high-speed jet of mouth, for making the suction chamber 16 generate low pressure.The suction
The aperture of cinder hole 13 everywhere is identical, and the aperture of the mixing tube 17 everywhere is also identical, and the aperture in the slag absorbing hole 13 is less than institute
The caliber of mixing tube 17 is stated, is blocked to avoid landwaste in 17 bridging of mixing tube, to be the annular space mud of cutting carring
Flow channel is provided in into reamer.
The extension diameter section 11 is integrally formed with the reamer head 9, the uniform portion 21, the gradual change portion 22 and described
Diffuser 18 is integrally formed.The reamer head 9, the extension diameter section 11, the nozzle, the mixing tube 17 and the diffusion
18 coaxial line of pipe.
Referring to FIG. 2, the embodiment provides a kind of horizontal directional drill injector formula reacting cycle reaming system,
Including above-mentioned horizontal directional drill injector formula reacting cycle reamer 6, further include drilling, slush pump 1 and with the slush pump 1
The horizontal directional drilling machine 3 connected by high-pressure rubber pipe 2, the slush pump 1 are used for extracting work mud, the horizontal directional drill
Injector formula reacting cycle reamer 6 is located in the drilling, and described drill is equipped with use close to one end of the horizontal directional drilling machine 3
Mud pit 4 is held in providing burying for annular space mud, one end far from the horizontal directional drilling machine 3 is equipped with for recycling the work
The front end of the unearthed end mud pit 8 of mud, horizontal directional drill injector formula reacting cycle reamer 6 is connected by a drilling rod 5
The horizontal directional drilling machine 3 is connect, its rear end connects the unearthed end mud pit 8 by another drilling rod 7.
11 diameter of extension diameter section is less than the diameter for the drilling that will be counter-bored, and main purpose is to reduce work
Energy loss of the mud after cleaning spray orifice 10 injection in annular space, so that enhancing rinses the rock bit 12, is cold
But effect.
It buries to hold in the drilling and configures the slush pump 1, high-pressure work mud is pumped by the slush pump 1 to be recycled back to
Road, high-pressure work mud via the high-pressure rubber pipe 2 and the horizontal directional drilling machine 3, and by with the horizontal directional drill use
The drilling rod 5 that 6 front end of injector formula reacting cycle reamer is connected is pumped into the horizontal directional drill injector formula reacting cycle reaming
In device 6.Partial high pressure works mud by flowing to the rock bit 12, cleaning, cooling institute after the cleaning spray orifice 10 at a high speed
Work mud carrying part landwaste in this part passes through the slag absorbing hole 13 entrance suction chamber 16 after stating rock bit 12.Part
High-pressure work mud forms low through the nozzle contraction section 14 at the mouth 15 in the suction chamber 16 after high speed injection
Pressure.Under inside and outside differential pressure effect, described bury holds the mud in mud pit 4 after via the extension diameter section 11, to take by annular space
Band landwaste enters the suction chamber 16 by the slag absorbing hole 13.Into in the mixing tube 17 landwaste and mud in mixing tube
Landwaste-mud blending agent is formed after being sufficiently mixed in 17, the landwaste-mud blending agent simultaneously will in the diffuser 18
Part kinetic energy enters the brill being connect with 6 rear end of horizontal directional drill injector formula reacting cycle reamer after being changed into pressure energy
Bar 7 realizes reaming reacting cycle to be back to the unearthed end mud pit 8.
The technical solution that the embodiment of the present invention provides has the benefit that
(1) horizontal directional drill injector formula reacting cycle reamer of the present invention and system make the rock bit 12
Landwaste caused by cutting passes through the brill that is connect with the rear end of the horizontal directional drill injector formula reacting cycle reamer 6
Bar 7 returns to the native end mud pit 8 of earth's surface, since the diameter of the drilling rod 7 is much smaller than bore diameter, the mud of cutting carring
High flow rate can be easily obtained in drilling rod 7, so that bulky grain landwaste is easily drained, reduce Annular Cuttings in the heap of foot of hole
Product, greatly improves Cutting movement efficiency, solves the problem that major diameter horizontal directional drill annular space mud speed rate is low, and landwaste deposits.
(2) rock that horizontal directional drill injector formula reacting cycle reamer of the present invention and system generate reaming
Bits are discharged by the drilling rod 7 that the rear end of the horizontal directional drill injector formula reacting cycle reamer 6 is connected, due to boring
7 diameter of bar is smaller, and the mud of cutting carring flow velocity in drilling rod 7 is higher, reduces its requirement to mud suspendability, therefore right
Mud property requires lower.
(3) horizontal directional drill of the present invention injector formula reacting cycle reamer and the extension diameter section 11 of system are straight
Diameter is larger but is less than the diameter for the drilling that will be counter-bored, and can effectively reduce energy damage of the cleaning spray orifice jet stream in annular space
It loses, enhances 12 cleaning effect of drill bit, while the possibility that cutting landwaste is migrated to annular space can be reduced, to a certain extent produce cutting
Between raw landwaste is enclosed between the extension diameter section 11 and the ontology 20, landwaste is promoted to be aspirated and entered by the slag absorbing hole 13
In reamer 6, Annular Cuttings migration efficiency is improved.
Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360548.1A CN109184571B (en) | 2018-11-15 | 2018-11-15 | An ejector type reverse circulation reamer and system for horizontal directional drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360548.1A CN109184571B (en) | 2018-11-15 | 2018-11-15 | An ejector type reverse circulation reamer and system for horizontal directional drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109184571A true CN109184571A (en) | 2019-01-11 |
| CN109184571B CN109184571B (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811360548.1A Expired - Fee Related CN109184571B (en) | 2018-11-15 | 2018-11-15 | An ejector type reverse circulation reamer and system for horizontal directional drilling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852336A (en) * | 2020-08-27 | 2020-10-30 | 安徽建筑大学 | A drilling tool for horizontal directional drilling and reaming |
| CN112647880A (en) * | 2020-12-23 | 2021-04-13 | 中国地质大学（武汉） | Reverse circulation continuous non-integral coring method for horizontal directional drilling investigation |
| CN114278230A (en) * | 2021-12-30 | 2022-04-05 | 库尔勒施得石油技术服务有限公司 | A reverse circulation drill |
| CN114718453A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气集团有限公司 | Ditching device, ditching system and ditching method for leveling back section |
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| CN205605119U (en) * | 2016-05-04 | 2016-09-28 | 廊坊华元机电工程有限公司 | Pass through reducing enlarger for pipeline |
| CN207879247U (en) * | 2018-02-08 | 2018-09-18 | 佘翀 | It combines reducing and sprays Pump breath countercirculate boundling down-hole hammer |
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| CN111852336A (en) * | 2020-08-27 | 2020-10-30 | 安徽建筑大学 | A drilling tool for horizontal directional drilling and reaming |
| CN112647880A (en) * | 2020-12-23 | 2021-04-13 | 中国地质大学（武汉） | Reverse circulation continuous non-integral coring method for horizontal directional drilling investigation |
| CN114718453A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气集团有限公司 | Ditching device, ditching system and ditching method for leveling back section |
| CN114278230A (en) * | 2021-12-30 | 2022-04-05 | 库尔勒施得石油技术服务有限公司 | A reverse circulation drill |
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