CN100582433C - Hole bottom annular spacing strong suction device of through type down-the-hole hammer - Google Patents
Hole bottom annular spacing strong suction device of through type down-the-hole hammer Download PDFInfo
- Publication number
- CN100582433C CN100582433C CN200810050994A CN200810050994A CN100582433C CN 100582433 C CN100582433 C CN 100582433C CN 200810050994 A CN200810050994 A CN 200810050994A CN 200810050994 A CN200810050994 A CN 200810050994A CN 100582433 C CN100582433 C CN 100582433C
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- China
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- drill bit
- spline housing
- hole
- reverse circulation
- spray nozzle
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Abstract
The invention relates to an oil-gas well hard rock drilling tool and other drilling and tunneling tools, in particular to a through-type pneumatic down-the-hole hammer hole-bottom circular space powerful suction device. A reverse circulation drill bit is provided with a drill bit accepting cavity and a drill bit mixing spray nozzle; re-absorption spacing is arranged between a spline housing and the reverse circulation drill bit; the spline housing is provided with a spline housing injection spray nozzle; the spline housing injection spray nozzle is communicated with an air exhaust channel between the reverse circulation drill bit and the spline housing; the drill bit accepting cavity is communicated with the drill bit mixing spray nozzle. According to the injection principle, because of the entrainment of high-speed fluid, the waste gas and the rock powder returning to the circular spacing between the drill bit and the hole wall is entrained from the re-absorption spacing to the drill bit accepting cavity, and is mixed with the high-speed air flow from the spline housing injection spray nozzle in the drill bit mixing spray nozzle, to form the mixed jet fluid. The invention improves the through-type down-the-hole hammer reverse circulation forming capability, and solves the problems of hole shrinkage, sticking and the loss of partial ore samples caused by escaping of partial gas with small particles of rock debris and rock powder from the circular spacing of a drill hole.
Description
Technical field
The present invention relates to a kind of oil gas well hard-rock boring and other drilling machine tool, especially through pneumatic down hole hammer bottom annular spacing strong suction device.
Background technology
The anti-continuous coring technology that circulates of hollow hammer hole is a kind of advanced person's a drilling process.Its operating principle is: the outer ring channel of compressed air by double-wall drill pipe enters the acting of down-the-hole hammer driven plunger, behind the reverse circulation drill bit of the waste gas after the acting through the multiinjector principle, produces negative pressuren zone at the bottom of the hole, forms that full hole is counter circulates.Because this technology core recovery percentage height, the anti-circulation in full hole and little to ground disturbance are so have bigger advantage at the difficult problem of creeping into that solves bad ground.In recent years, in the stratum of different geological conditions, test, obtained good effect.
The principal character that the structure of hollow hammer hole is different from common down-the-hole hammer is; The design of hollow type.Mainly inner chamber is divided into preceding air chamber, rear gas chamber, produces impact energy, realize creeping into by the compressed air-driven reciprocating motion of the pistons by outer shell, inner casing, piston and core barrel.Waste gas after the acting carries rock core and returns to the face of land on the inner via hole of core barrel through anti-circulation target drill, realizes anti-circulation continuous coring.In the anti-continuous coring detritus drilling process that circulates of existing hollow hammer hole, when drill bit was pressed close at the bottom of the hole, gas-entrained hole bed rock sample ore returned on the through hole of drill bit, and this moment, anti-circulating effect was good, annular gap between drilling tool and the hole wall is crossed air quantity seldom, and is also very little to the disturbance of hole wall.In the time of at the bottom of drilling tool is lifted from the hole, the down-the-hole hammer is not worked, blow the hole by force to forming at the bottom of the hole, overwhelming majority gas expands suddenly and anti-circulation canal returns to the face of land from the center, has good deslagging ability this moment, but exist fraction gas to overflow from outer czermak space, carrying the fine grained rock dust runs away by direct circulation, cause fraction rock sample ore to be lost, and because this part is also little from outer shroud escaping gas flow, the landwaste rock dust removing ability that hole wall is adhered to is strong inadequately, causes the part rock dust to be deposited in the step place of down-the-hole hammer and double-wall drill pipe handing-over, accumulation causes the undergauge and the stick of tool of boring easily for a long time, and serious underground drilling accident may take place.When having low amounts of water in the hole, the probability of undergauge and stick of tool increases.The undergauge that the portion gas that the outer czermak space of holing is overflowed causes and the problem of stick of tool, it is the more typical difficult point that counter this advanced technologies of continuous coring that circulates of present stage hollow hammer hole occurs in applying process, only address this problem, could improve this technology better.
The subject matter that exists in the hollow hammer hole application process is at present: drill bit breaks away from the bottom of the hole in the process of blowing the hole by force, gas volume expands rapidly, part gas-entrained molecule rock dust is overflowed from the annular gap of drilling tool and boring, be not enough to rock dust is discharged boring owing to return wind speed on the gas flow of outer czermak space is little, rock dust is suspended on hole wall and is deposited in the step place that drilling tool is connected.Not only cause losing of rock sample ore, and rock dust piles up for a long time, when especially meeting water in the hole, cause problems such as undergauge and stick of tool easily.
Summary of the invention
Purpose of the present invention just is at above-mentioned the deficiencies in the prior art, provides a kind of and loses the hole bottom annular spacing strong suction device of through type down-the-hole hammer of problem to solve undergauge, stick of tool and the part sample ore that a part of gas-entrained granule landwaste rock dust causes from boring outer ring-like gap ease.
The objective of the invention is to realize in the following manner:
Be provided with spline housing driving nozzle 3 in the spline housing 2, reverse circulation drill bit 1 is provided with drill bit receptive cavity 5 and drill bit mixing nozzle 6, offer between spline housing 2 and the reverse circulation drill bit 1 and heavily absorb gap 4, spline housing driving nozzle 3 is connected with exhaust passage between reverse circulation drill bit 1 and the spline housing 2, and drill bit receptive cavity 5 is connected with drill bit mixing nozzle 6.
Good effect: the present invention has improved the anti-ability that circulates and form of present hollow hammer hole, has solved undergauge, stick of tool and the part sample ore that a part of gas-entrained granule landwaste rock dust causes from boring outer ring-like gap ease and has lost problem.
Description of drawings
Accompanying drawing: hole bottom annular spacing strong suction device of through type down-the-hole hammer sectional view
1 reverse circulation drill bit, 2 spline housings, 3 spline housing driving nozzles, 4 heavily absorb the gap, 5 drill bit receptive cavities, 6 drill bit mixing nozzles
The specific embodiment
Below in conjunction with accompanying drawing and example the present invention is described in further detail:
Be provided with spline housing driving nozzle 3 in the spline housing 2, reverse circulation drill bit 1 is provided with drill bit receptive cavity 5 and drill bit mixing nozzle 6, offer between spline housing 2 and the reverse circulation drill bit 1 and heavily absorb gap 4, spline housing driving nozzle 3 is connected with exhaust passage between reverse circulation drill bit 1 and the spline housing 2, and drill bit receptive cavity 5 is connected with drill bit mixing nozzle 6.
When down-the-hole is hammered normal percussion drilling into shape, a part of waste gas that driven plunger is impacted after the acting enters spline housing driving nozzle 3 by the exhaust passage between reverse circulation drill bit 1 and the spline housing 2, drill bit receptive cavity 5 is advanced in the high-speed gas direct injection, according to injection principle, in this process, because the effect of entrainmenting of high-velocity fluid, will entrainment waste gas that returns on the annular gap between drill bit and the hole wall and rock dust in the drill bit receptive cavity 5 from heavily absorbing gap 4, and and mix in drill bit mixing nozzle 6 from the high velocity air of spline housing driving nozzle, form the mixing jetting fluid.This mixing jetting fluid is through the guide functions of drill bit mixing nozzle 6, directly acts on the landwaste at the bottom of the hole, plays the effect of deslagging and cooling drill bit.By heavily absorbing gap 4, the gas and the rock dust of running away from annulus carried out heavily absorbing, the generation that undergauge, stick of tool and the part sample ore that effectively prevents a part of gas-entrained granule landwaste rock dust from escaping from boring outer ring-like gap and cause lost, also effectively raise simultaneously the ability that anti-circulation forms in whole the creeping into, improve drilling efficiency and core recovery percentage greatly.
Claims (1)
1, a kind of hole bottom annular spacing strong suction device of through type down-the-hole hammer, it is characterized in that, reverse circulation drill bit (1) is provided with drill bit receptive cavity (5) and drill bit mixing nozzle (6), offer between spline housing (2) and the reverse circulation drill bit (1) and heavily absorb gap (4), be provided with spline housing driving nozzle (3) in the spline housing (2), spline housing driving nozzle (3) is connected with exhaust passage between reverse circulation drill bit (1) and the spline housing (2), drill bit receptive cavity (5) is connected with drill bit mixing nozzle (6), when down-the-hole is hammered normal percussion drilling into shape, a part of waste gas that driven plunger is impacted after the acting enters spline housing driving nozzle (3) by the exhaust passage between reverse circulation drill bit (1) and the spline housing (2), drill bit receptive cavity (5) is advanced in the high-speed gas direct injection, waste gas that returns on the annular gap between drill bit and the hole wall and rock dust are entrainmented in the drill bit receptive cavity (5) from heavily absorbing gap (4), and and mix in drill bit mixing nozzle (6) from the high velocity air of spline housing driving nozzle, form the mixing jetting fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810050994A CN100582433C (en) | 2008-07-22 | 2008-07-22 | Hole bottom annular spacing strong suction device of through type down-the-hole hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810050994A CN100582433C (en) | 2008-07-22 | 2008-07-22 | Hole bottom annular spacing strong suction device of through type down-the-hole hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101319598A CN101319598A (en) | 2008-12-10 |
| CN100582433C true CN100582433C (en) | 2010-01-20 |
Family
ID=40179835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810050994A Expired - Fee Related CN100582433C (en) | 2008-07-22 | 2008-07-22 | Hole bottom annular spacing strong suction device of through type down-the-hole hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100582433C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886521B (en) * | 2009-05-17 | 2013-01-09 | 辽宁有色一0一勘测工程公司 | Pneumatic reverse circulating drilling tool for fixing holes |
| CN101956525B (en) * | 2010-09-08 | 2013-05-08 | 吉林大学 | Down-the-hole hammer reverse concentric casing drilling tool |
| CN102966304B (en) * | 2012-11-28 | 2014-12-31 | 吉林大学 | Mud retaining wall and air down-the-hole hammer drilling tool and drilling technology |
| CN104405280B (en) * | 2014-12-10 | 2016-09-07 | 吉林大学 | Stroke differential type high energy surges down-the-hole air hammer |
| CN115110949B (en) * | 2020-04-10 | 2023-03-31 | 中国地质科学院探矿工艺研究所 | Forward and reverse circulation remote control device of continuous sampling drilling system |
| CN115234186B (en) * | 2022-08-12 | 2024-02-27 | 中国铁建重工集团股份有限公司 | Combined coring drilling machine and working method thereof |
-
2008
- 2008-07-22 CN CN200810050994A patent/CN100582433C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 贯通式潜孔锤反循环钻进技术在复杂地层中的应用. 殷其雷，博坤，李忠.探矿工程（岩土钻掘工程）. 2008 |
| 贯通式潜孔锤反循环钻进技术在复杂地层中的应用. 殷其雷，博坤，李忠.探矿工程（岩土钻掘工程）. 2008 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101319598A (en) | 2008-12-10 |
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Granted publication date: 20100120 Termination date: 20110722 |