CN108442890B - Sediment drilling rod is arranged in release of axial recess pilot hole - Google Patents
Sediment drilling rod is arranged in release of axial recess pilot hole Download PDFInfo
- Publication number
- CN108442890B CN108442890B CN201810488838.8A CN201810488838A CN108442890B CN 108442890 B CN108442890 B CN 108442890B CN 201810488838 A CN201810488838 A CN 201810488838A CN 108442890 B CN108442890 B CN 108442890B
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- rod
- slag
- axial groove
- hole
- drill rod
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
Abstract
The invention discloses an axial groove hole-protecting pressure-relief internal slag-discharging drill rod which comprises a hollow rod body, a flow injection pipe coaxially arranged in the rod body, and a support member for connecting the rod body and the flow injection pipe, wherein a slag-discharging channel is arranged between the inner wall of the rod body and the outer wall of the flow injection pipe, an air inlet channel and a water inlet channel are arranged in the flow injection pipe, an axial groove axially parallel to the outer cylindrical surface of the rod body is arranged on the outer cylindrical surface of the rod body, and a plurality of pressure-relief holes communicated with cavities in the rod body are. When holes are drilled and collapsed, coal slag around the drill rod enters the slag discharging channel through the pressure relief holes, the acting force of the coal slag on the drill rod is released, meanwhile, the axial grooves have the hole digging capacity, the peripheral coal slag is in a loose motion state, and the coal slag enters the slag discharging channel through the pressure relief holes, so that a collapsed hole area is dredged.
Description
Technical Field
The invention belongs to the technical field of coal mine gas extraction drilling, and particularly relates to an axial groove hole protection pressure relief internal slag discharge drill rod suitable for drilling gas extraction drilling of soft coal seams and outburst coal seams.
Background
The drilling of the soft coal seam and the outburst coal seam has the problems of difficult drilling and deslagging, low drilling efficiency, shallow drilling depth, low hole forming rate, poor hole forming effect and the like, and directly influences the drilling and sealing quality and the gas extraction efficiency.
At present, in the aspect of soft outburst coal seam drilling in China, generally adopted drill rods comprise a spiral (low-spiral) drill rod and a triangular drill rod. Because the diameter of the spiral grooving drill rod is far smaller than that of the drill hole, the drill rod has no hole protection capability, and coal on the hole wall is easy to unstably deform or even collapse; when the three-edged drill rod drills, the rotating diameter of the three-edged groove drill rod is close to the diameter of a drilled hole, but the contact area between the three-edged groove drill rod and the drilled hole is small, the hole protection capability is weak, and when the three-edged drill rod adopts a hydraulic slag removal mode, the slag removal effect is not ideal. In addition, the slag discharge channels of the two drill rods are positioned between the outer wall of the drill rod and the wall of the hole, the influence of hole diameter shrinkage or hole collapse on the section of the slag discharge channel is large, and the drill jamming phenomenon is easy to occur in the drilling process.
The invention discloses a dual-channel porous turbulent flow pressure relief drilling tool for soft coal rock drilling, which comprises the following parts: CN203584298U, a double-channel porous turbulent flow pressure-relief drill rod is adopted, so that the drill rod has good effects on hole protection and slag discharge channel protection, but the drill rod does not have the capability of cutting the hole wall to protrude out of a coal body, and the phenomena of drill clamping and drill holding are easy to occur; the number of the pressure relief holes is too large, the strength of the drill rod is low, and the phenomenon of broken drill is easy to occur.
Disclosure of Invention
Aiming at the problems, the axial groove hole-protecting pressure-relief inner slag-discharging drill rod has two layers of hole-protecting capacity, pressure relief and blockage prevention around the drill rod, and provides the axial groove hole-protecting pressure-relief inner slag-discharging drill rod with good hole-forming effect, high drilling efficiency and deep drilling depth according to the principles that the drilling resistance is reduced by coal bodies protruding from the hole-protecting hole of the large-diameter drill rod and the cutting hole wall of the axial groove, and the slag is discharged from a plurality of holes.
In order to achieve the purpose, the following technical scheme is adopted.
The utility model provides a row's sediment drilling rod in axial recess eyehole release, includes the hollow body of rod, coaxial setting at the inside notes flow tube of the body of rod, the support piece of connecting the body of rod and notes flow tube, for arranging slag channel between body of rod inner wall and the notes flow tube outer wall, annotate the inside air inlet, the inhalant canal that is of flow tube, be equipped with the axial recess rather than axial parallel on the outer face of cylinder of the body of rod, be equipped with one or many axial recesses on the body of rod. A plurality of pressure relief holes communicated with the inner cavity of the rod body are arranged in the axial groove. The pressure relief hole enables the outside of the drill rod to be communicated with the slag discharge channel.
In order to improve the service life and the cutting effect of the drill rod, the surface of the drill rod can be subjected to abrasion resistance treatment; in order to improve the slag discharge capacity of the first drill rod connected with the drill bit, as many pressure relief holes as possible are arranged in the axial groove of the first drill rod.
And the outer cylindrical surface at one end part of the rod body is provided with an external thread, the inner cylindrical surface at the other end part of the rod body is provided with an internal thread, and the external thread can be matched with the internal thread.
The utility model discloses a water injection pipe, including body of rod, injection pipe, support piece, the body of rod is provided with a plurality ofly in the complete set, carries out the screw thread through internal thread and external screw thread cooperation between the adjacent body of rod and connects, connects through plug-in components between the adjacent injection pipe.
The cross section of the axial groove is arc-shaped, rectangular or trapezoidal, and a chamfer is arranged at the transition position of the axial groove and the outer cylindrical surface of the rod body.
The pressure relief holes are circular holes and strip-shaped holes.
And a single row or double rows of pressure relief holes are arranged in each axial groove.
Support piece is including solid fixed ring and landing leg, gu fixed ring cover in the notes flow tube outside and rather than fixed connection, landing leg one end and solid fixed ring fixed connection, the other end along solid fixed ring radially outwards extend the body of rod and with body of rod fixed connection.
When a soft coal seam is drilled, the coal body on the hole wall is easy to loose and collapse, so that the hole drilling and forming effect is poor and the drilling efficiency is low. By adopting the structure, the slag discharging fluid enters the bottom of the drill hole through the air inlet channel and the water inlet channel, and the slag is carried to discharge out of the drill hole through the slag discharging channel formed by the inner wall of the rod body and the outer wall of the flow injection pipe. According to the principle of hole protection of a large-diameter drill rod and multi-hole slag feeding and pressure relief, when the drill rod rotates at a high speed, the contact surface between the outer wall of a drill hole and the wall of the drill hole is large, the drill rod provides a certain supporting force for the wall of the drill hole, so that loose coal on the wall of the drill hole is not prone to collapse, the hole protection effect is achieved, and meanwhile, a slag discharging channel is located inside the drill rod and protected by the outer wall of the drill rod, and blockage in the drilling. Secondly, the axial grooves can cut loose and protruding coal bodies, and drilling resistance is reduced. In addition, when holes are drilled and collapsed, coal slag around the drill rod enters the slag discharging channel through the pressure relief holes, the acting force of the coal slag on the drill rod is released, meanwhile, the axial grooves have the hole digging capacity, the peripheral coal slag is in a loose motion state, and the coal slag enters the slag discharging channel through the pressure relief holes, so that the collapsed hole area is dredged.
The invention has the advantages that the ① axial groove has the function of cutting coal bodies with convex hole walls, so that the drilling resistance is reduced, the problem that the drill rod is large in drilling resistance and easy to clamp due to the fact that the double-channel multi-turbulence pressure relief drill rod does not have coal bodies with convex cut hole walls is solved, the ② pressure relief holes are arranged at equal intervals, the influence of the pressure relief holes on the strength of the drill rod can be reduced, through field test tests, the axial groove hole-protecting pressure relief internal deslagging drill rod has excellent capacity of cutting coal residues with convex hole walls, the rotation resistance is greatly reduced, the strength is improved by more than 30% compared with that of the double-channel multi-turbulence pressure relief drill rod, the axial groove-protecting pressure relief internal deslagging channel anti-blockage and pressure relief hole slag-feeding anti-clamping advantages are simultaneously achieved, the ③ coal residues entering the deslagging channel through the axial groove are integrally linear, so that deslagging is smoother, blocking is more difficult, and the ④ linear axial groove slag scraping capacity is.
Drawings
FIG. 1 is a front view of embodiment 1;
FIG. 2 is a longitudinal cross-sectional view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a front view of embodiment 2;
fig. 5 is a longitudinal sectional view of fig. 4.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy or attainment of the same purpose, are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 and 2, embodiment 1 is an axial groove hole protection pressure-relief internal slag-discharge drill rod, which includes a hollow rod body 7, a flow injection pipe 3 coaxially disposed inside the rod body 7, and a support member 4 connecting the rod body 7 and the flow injection pipe 3, wherein a slag discharge passage 6 is disposed between an inner wall of the rod body 7 and an outer wall of the flow injection pipe 3, an air inlet and a water inlet passage 5 are disposed inside the flow injection pipe 3, an axial groove 1 is disposed on an outer cylindrical surface of the rod body 7, and a plurality of pressure-relief holes 2 communicating with the slag discharge passage 6 are disposed in the axial groove 1.
In order to improve the slag discharge capacity of the first drill rod connected with the drill bit, the axial groove 1 of the first drill rod is provided with the pressure relief holes 2 as many as possible, and in order to improve the service life and the cutting effect of the drill rod, the outer surface of the drill rod can be subjected to wear-resistant treatment.
And an external thread 8 is arranged on the outer cylindrical surface of one end part of the rod body 7, an internal thread 9 is arranged on the inner cylindrical surface of the other end part of the rod body, and the external thread 8 can be matched with the internal thread 9.
The utility model discloses a water injection pipe, including body of rod 7, injection pipe 3, support piece 4, the body of rod 7 is provided with a plurality ofly in the complete set, carries out the screw thread through the cooperation of internal thread 9 and external screw thread 8 between the adjacent body of rod 7 and connects, connects through plug-in components 10 between the adjacent injection pipe 3.
The cross section of the axial groove 1 is arc-shaped, rectangular or trapezoidal, and a chamfer is arranged at the transition position of the axial groove 1 and the outer cylindrical surface of the rod body 7.
The pressure relief holes 2 are circular holes and strip-shaped holes.
Each axial groove 1 is internally provided with a row of pressure relief holes.
As shown in fig. 3, the supporting member 4 includes a fixing ring 41 and a leg 42, the fixing ring 41 is sleeved outside the injection tube 3 and is fixedly connected therewith, one end of the leg 42 is fixedly connected with the fixing ring 41, and the other end of the leg 42 radially extends outwards to the rod body 7 along the fixing ring 41 and is fixedly connected with the rod body 7.
As shown in fig. 4 and 5, the embodiment 2 is different from the embodiment 1 in that a double row of pressure relief holes 2 are formed in the axial grooves. Meanwhile, two adjacent axial grooves can be arranged into a single row and a double row.
When a soft coal seam is drilled, the coal body on the hole wall is easy to loose and collapse, so that the hole drilling and forming effect is poor and the drilling efficiency is low. By adopting the structure, the slag-removing fluid enters the bottom of the drill hole through the air inlet channel and the water inlet channel 5, and the slag-removing channel 6 which carries the coal slag and is formed by the inner wall of the rod body 7 and the outer wall of the flow injection pipe 3 discharges the drill hole. According to the principle of hole protection of a large-diameter drill rod and porous slag feeding and pressure relief, when the drill rod rotates at a high speed, the contact surface between the outer wall of a drill hole and the wall of the hole is large, the rod body provides a certain supporting force for the wall of the hole, so that loose coal on the wall of the hole is not easy to collapse, the hole protection effect is achieved, and meanwhile, the slag discharge channel 6 is located inside the drill rod and protected by the outer wall of the drill rod, and blockage in the drilling process is avoided. Secondly, the axial grooves 1 can cut loose and protruding coal bodies, and drilling resistance is reduced. In addition, when holes are drilled and collapsed, coal slag around the rod body 7 enters the slag discharging channel 6 through the pressure relief holes 2, the acting force of the coal slag on the drill rod is released, meanwhile, the axial grooves 1 have the hole digging capacity, the peripheral coal slag is in a loose motion state, and the coal slag enters the slag discharging channel 6 through the pressure relief holes 2, so that the collapsed hole area is dredged.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a row's sediment drilling rod in axial recess pilot hole release which characterized in that: including the hollow body of rod, the coaxial support piece that sets up at the inside notes flow tube of the body of rod, the connecting rod body and notes flow tube, for slag notch between body of rod inner wall and the notes flow tube outer wall, annotate the inside air inlet, inhalant canal that is of the flow tube, be equipped with the axial recess rather than axial parallel on the outer face of cylinder of the body of rod, be provided with the release opening of the inside cavity of a plurality of intercommunication bodies of rod in the axial recess.
2. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 1, wherein: and the outer cylindrical surface at one end part of the rod body is provided with an external thread, the inner cylindrical surface at the other end part of the rod body is provided with an internal thread, and the external thread can be matched with the internal thread.
3. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 2, wherein: the utility model discloses a water injection pipe, including body of rod, injection pipe, support piece, the body of rod is provided with a plurality ofly in the complete set, carries out the screw thread through internal thread and external screw thread cooperation between the adjacent body of rod and connects, connects through plug-in components between the adjacent injection pipe.
4. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 1, wherein: the cross section of the axial groove is arc-shaped, rectangular or trapezoidal, and a chamfer is arranged at the transition position of the axial groove and the outer cylindrical surface of the rod body.
5. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 1, wherein: the pressure relief holes are circular holes and strip-shaped holes.
6. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 1, wherein: a plurality of axial grooves are formed in the rod body.
7. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 6, wherein: and a single row or double rows of pressure relief holes are arranged in each axial groove.
8. The axial groove hole-protecting pressure-relief internal slag-discharging drill rod as claimed in claim 1, wherein: support piece is including solid fixed ring and landing leg, gu fixed ring cover in the notes flow tube outside and rather than fixed connection, landing leg one end and solid fixed ring fixed connection, the other end along solid fixed ring radially outwards extend the body of rod and with body of rod fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488838.8A CN108442890B (en) | 2018-05-21 | 2018-05-21 | Sediment drilling rod is arranged in release of axial recess pilot hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488838.8A CN108442890B (en) | 2018-05-21 | 2018-05-21 | Sediment drilling rod is arranged in release of axial recess pilot hole |
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| Publication Number | Publication Date |
|---|---|
| CN108442890A CN108442890A (en) | 2018-08-24 |
| CN108442890B true CN108442890B (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810488838.8A Active CN108442890B (en) | 2018-05-21 | 2018-05-21 | Sediment drilling rod is arranged in release of axial recess pilot hole |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653689A (en) * | 2019-01-25 | 2019-04-19 | 安徽理工大学 | A kind of water conservancy diversion drilling rod |
| CN111894477B (en) * | 2020-07-08 | 2022-02-22 | 河南理工大学 | Outburst coal seam hole protection and pressure relief combined drilling tool and using method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201705214U (en) * | 2010-03-30 | 2011-01-12 | 河南理工大学 | Multi-arris hot-melt coating wearable drilling rod |
| CN203035104U (en) * | 2013-02-04 | 2013-07-03 | 成都大漠石油机械有限公司 | Oil hollow drill rod |
| CN203584298U (en) * | 2013-11-15 | 2014-05-07 | 河南理工大学 | Soft coal rock drilling dual-channel porous turbulent pressure relief drill |
| CN104314482B (en) * | 2014-10-23 | 2017-04-12 | 河南理工大学 | Closed type helical hole-protecting drill and using method thereof for drilling of soft coal bed |
| CN104405294B (en) * | 2014-10-29 | 2016-06-29 | 成都科盛石油科技有限公司 | It is easy to the oil hollow drill of dust lead |
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| CN108442890A (en) | 2018-08-24 |
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