CN103541662A - Novel full-hole reverse circulation down-hole hammer drill - Google Patents
Novel full-hole reverse circulation down-hole hammer drill Download PDFInfo
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- CN103541662A CN103541662A CN201310557398.4A CN201310557398A CN103541662A CN 103541662 A CN103541662 A CN 103541662A CN 201310557398 A CN201310557398 A CN 201310557398A CN 103541662 A CN103541662 A CN 103541662A
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- spray orifice
- hole
- drill bit
- interior spray
- drill
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- 239000011324 bead Substances 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 60
- 239000010410 layer Substances 0.000 claims description 11
- 230000007480 spreading Effects 0.000 claims description 5
- 239000002355 dual-layer Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 9
- 239000011435 rock Substances 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract 10
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a novel full-hole reverse circulation down-hole hammer drill which comprises an air discharge groove, a clamp groove, a spline, a cylindrical face, a core tube inner hole, a center channel, a diffusion groove, an outer edge circular bead and a circular bead face. A plurality of bottom air spraying discharging holes are evenly formed in the bottom lip face of the drill, a plurality of inner spraying holes are evenly formed in a spline groove in the circumferential direction of the spline groove, the inner spraying holes are evenly formed to form two layers in parallel in the circumferential direction of the spline groove, certain angles are formed between the central axes of the inner spraying holes and the central axis of the drill, the inner spraying holes are spiral excursion holes, namely intersection points of the central axes of the inner spraying holes and the inner wall of a central channel serve as base points, and then the inner spraying holes are offset by a certain angle along the circumference of the drill. According to the adjacent inner spraying holes between the upper layer and the lower layer, the inner spraying holes in the lower layer are offset by a certain angle along the circumference of the drill relative to the inner spraying holes in the upper layer. According to the designed reverse circulation down-hole hammer drill, the drilling efficiency is high, the core fetching rate is high, the rock core quality is good, a core is not required to be obtained in a drill lifting mode, and the reverse circulation effect formed by hole bottom fluid is effectively improved.
Description
Technical field
The present invention relates to the anti-continuous coring drilling technology that circulates, specifically relate to the anti-down-hole hammer drill bit that circulates in a kind of novel full hole.
Background technology
Anti-circulation continuous coring drilling technology be a kind of while utilizing drilling well circulatory mediator from shaft bottom cutting carring or rock core, by drilling rod central passage, return the technical method to earth's surface, be referred to as CSR method abroad.The use of double-wall drill pipe is the most general, in addition also has individual layer and three layers of drilling rod.Circulatory mediator is pressed in well by two-tube annular space, from inner tube central passage cutting carring (heart), returns, and institute is in this way called again two-tube anti-circulation.Down-the-hole hammer reverse circulating drill bit is the critical component of the anti-continuous coring drilling technology that circulates of hollow hammer hole, and it not only affects the broken situation of hole bed rock stone, also affects at the bottom of clean-out opening and the effect of carrying landwaste.The reverse circulation drill bit of developing the nineties is used widely in solid mineral deposit exploration and hydrological well probing, obtains better achievement, but when creeping into the stratum of complicated condition, because compressed air is missed from crack and hole, anti-circulation is difficult to form.For solving this difficult problem, the optimization of reverse circulation drill bit structure is modified into for important subject.
Typical hollow pneumatic down-hole hammer reverse circulation industrial is that compressed air enters hollow hammer hole through the annular gap of double wall drill tool as principle, before and after entering respectively through outer, inner casing annular channel, air chamber promotion reciprocating motion of the pistons produces and impacts, and waste gas is discharged through drill bit steam vent by the circular passage between piston and core barrel.Core barrel upper end is connected with double-wall drill pipe, and the core barrel endoporus on drill bit top is inserted in lower end, be stuck on the step between core barrel endoporus and central passage, and tangible sealing ring sealing in seal groove.Core barrel inner via hole and bit central passage have formed the through hole of down-hole hammer, and hollow hammer hole is gained the name thus.
It is to realize by returning in central passage by driving waste gas after impact shock to wash away shaft bottom cutting carring (heart) that down-the-hole hammer reverse circulating creeps into.Drilling tool central passage basal area is little, the migration velocity of the body that can guarantee to backflow, and bore diameter can not exert an influence to it, and it is stable that flow velocity can keep.Outer annular space basal area is far longer than central bore passage basal area, the central passage that diameter is the very little speed that can guarantee to backflow on enough, but the two larger area but makes fluid media (medium), anti-circulation is difficult to form.
Even if the down-hole hammer drill bit adapted hollow hammer hole of ordinary construction, is also difficult to realize the anti-circulation of fluid media (medium).Compressed air from spray orifice ejection at the bottom of drill bit, because pressure is excessive, will inevitably be large to basal area, path motion that resistance is less, and the central passage fluid resistance of hollow hammer hole is far longer than outer annulus access.To this, the external technical measures that adopt mainly contain two: the one, and shutoff outer annular space gap, blocks outer annulus access, allows fluid discharge earth's surface by outer annular space; The 2nd, adopt drilling tool grating, use the supporting of drill bit that diameter is poor very little and drilling rod, realize grating, distance between drilling rod and hole wall is dwindled, reduce annular space basal area and increase fluid resistance, force fluid along returning in central passage, CSR sampling core technology has applied this principle.When application down-the-hole hammer reverse circulating technology Drilling well, due to bore diameter very large (160～311mm), therefore cannot use the method for drilling tool grating.Principle simple possible on the theoretical method of shutoff boring outer ring channel, but actual Consideration is more, complex structure, the difficulty that makes a trip, hinders and normally creep into operation, and cost is higher, and application life is low.
Summary of the invention
In view of the defect that prior art exists, the object of the invention is to provide a kind of simple in structure, anti-down-hole hammer drill bit that circulates of long service life and the excellent novel full hole of anti-circulating effect.
To achieve these goals, technical scheme of the present invention:
The anti-down-hole hammer drill bit that circulates in full hole, comprises and lets out wind groove, draw-in groove, spline, the face of cylinder, core barrel endoporus, central passage, spreading grooves, outer rim shoulder and circular bead surface, it is characterized in that: uniform some end spray steam vents on bit bottom lip surface; In described spline along the circumferential uniform some interior spray orifices of spline, described interior spray orifice is circumferentially parallel uniform two-layer along spline, the central axis of described interior spray orifice and drill bit central axis are at an angle, and described interior spray orifice is helical offset hole, the intersection point of interior orifice center axis and central passage inwall of take is basic point, again by interior spray orifice along drill bit circumferential backlash certain angle.
The diameter of described interior spray orifice is 5mm, the central axis of interior spray orifice to drill bit central axis angle angular range be 20 °---25 °, described interior spray orifice is 5 ° along the angle of drill bit circumferential backlash.
Described interior spray orifice upper and lower between two-layer in contiguous interior spray orifice ，Qi lower floor spray orifice compared with spray orifice in upper strata along drill bit circumferential backlash certain angle.
In described Dual-layer, between spray orifice, circumferential backlash angle is 20 °.
Compared with prior art, beneficial effect of the present invention:
The designed anti-circulation down-hole hammer drill bit drilling efficiency of the present invention is high, the rate of coring is high, rock core quality is good, without carrying, drill through the heart; And can effectively improve hole underflow body and form anti-circulating effect, significantly increase outer annular space air inflow, improve rig and creep into stability.
Accompanying drawing explanation
Fig. 1 is existing anti-circulation down-the-hole hammer drill header structure schematic diagram;
Fig. 2 is the anti-down-the-hole hammer drill header structure schematic diagram that circulates in the full hole of the present invention.
In figure:: 1, let out wind groove, 2, draw-in groove, 3, spline, 4, core barrel endoporus, 5, central passage, 6, end spray steam vent, 7, the face of cylinder, 8, outer rim shoulder, 9, spreading grooves, 10, alloy column tooth, 11, the upper conical surface, 12, circular bead surface, 13, interior spray orifice, spray orifice in spray orifice, B, lower floor in A, upper strata.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the present invention is further elaborated.
Typical hollow pneumatic down-hole hammer is as Fig. 1, its anti-periodic duty principle is that compressed air enters hollow hammer hole through the annular gap of double wall drill tool, before and after entering respectively through outer, inner casing annular channel, air chamber promotion reciprocating motion of the pistons produces and impacts, and waste gas is discharged through drill bit steam vent by the circular passage between piston and core barrel.Core barrel upper end is connected with double-wall drill pipe, and the core barrel endoporus 4 on drill bit top is inserted in lower end, is stuck on the step between core barrel endoporus 4 and central passage, and core barrel inner via hole and bit central passage 5 have formed the through hole of down-hole hammer.
The present invention has carried out further improvement on the architecture basics of existing anti-circulation down-hole hammer drill bit, comprises as shown in Figure 1 and lets out wind groove 1, draw-in groove 2, spline 3, the face of cylinder 7, core barrel endoporus 4, central passage 5, outer rim shoulder 8, spreading grooves 9 and circular bead surface 12 etc.; Improvements of the present invention are embodied in: uniform some end spray steam vents 6 on the face of cylinder 7 of drill bit bottom; Described end spray steam vent 6 runs through bit body.Drill bit arranges the design of end spray steam vent 6, the effect of entrainmenting that high velocity air by spray orifice ejection gas at the bottom of drill bit is produced surrounding fluid, near causing steam vent, form low-pressure area, externally annular clearance aspirates, a plurality of steam vents constantly rotate with drill bit, form ring-type low-pressure area at the bottom of hole, can effectively stop the formation of direct circulation, make air-flow cutting carring (heart) enter bit central hole by water conservancy diversion and spreading grooves 9, form stable anti-circulation.
Improvements of the present invention are embodied in: as shown in Figure 2, the present invention has designed jet orifice structure in double-layer spiral skew, i.e. the processing of interior spray orifice needs helical offset once, and the angle at this circumferential backlash angle is 5 degree; Upper and lower two-layer adjacent interior spray orifice is also offset an angle mutually, and this angle is 20 degree.
Concrete described spline 3 is interior along the circumferential uniform some central axis of spline 3 and drill bit central axis interior spray orifice 13 at an angle, described interior spray orifice is circumferentially parallel uniform two-layer along spline, the central axis of described interior spray orifice and drill bit central axis are at an angle, and described interior spray orifice is helical offset hole, the intersection point of interior orifice center axis and central passage inwall of take is basic point, again by interior spray orifice along 5 ° of drill bit circumferential backlash angles.The diameter of described interior spray orifice is 5mm, the central axis of interior spray orifice to drill bit central axis angle angular range be 20 °---25 °, contiguous interior spray orifice between described interior spray orifice is upper and lower two-layer, in its lower floor, spray orifice B is compared with spray orifice A in upper strata along drill bit circumferential backlash certain angle, and circumferential backlash angle is 20 °.
Such structure make the outer rim of interior spray orifice and the circle of central passage tangent, tangent object is to allow the high-velocity fluid that enters interior spray orifice 13 move along the arc track of central bore passage, reaches buffering, reduces jet energy loss, and form spiralling effect, be similar to " cyclone " principle.The stagger interior spray orifice of Dual-layer helical offset of certain angle of use can increase substantially the ability of screw lifting, makes suction effect more remarkable.
Evidence: end spray steam vent 6 diameter 3mm, quantity is 2; The diameter of interior spray orifice 13 is 5mm, and spray orifice is 4 in every layer, and the central axis of interior spray orifice and drill bit central axis angle angular range are 20 °---25 °, during 5 ° of interior spray orifice circumferential backlash angles, anti-circulating effect is optimum.
Principle is: due to the effect of entrainmenting, again form low-pressure area in central passage 5, therefore, enter landwaste (heart) in centre bore under the effect of upper and lower pressure differential, further accelerated, be more conducive to reverse circulating formation.And serious in compressed air leakage, end spray orifice cannot form in the situation of negative pressure, and the negative pressure that landwaste (heart) also can form due to interior spray orifice in central passage enters centre bore under differential pressure action, forms anti-circulation.
The above; it is only the preferably specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. the anti-down-hole hammer drill bit that circulates in novel full hole, comprises and lets out wind groove, draw-in groove, spline, the face of cylinder, core barrel endoporus, central passage, spreading grooves, outer rim shoulder and circular bead surface, it is characterized in that: uniform some end spray steam vents on bit bottom lip surface; In described spline along the circumferential uniform some interior spray orifices of spline, described interior spray orifice is circumferentially parallel uniform two-layer along spline, the central axis of described interior spray orifice and drill bit central axis are at an angle, and described interior spray orifice is helical offset hole, the intersection point of interior orifice center axis and central passage inwall of take is basic point, again by interior spray orifice along drill bit circumferential backlash certain angle.
2. the anti-down-hole hammer drill bit that circulates in novel full hole according to claim 1, it is characterized in that: the diameter of described interior spray orifice is 5mm, the central axis of interior spray orifice to drill bit central axis angle angular range be 20 °---25 °, described interior spray orifice is 5 ° along the angle of drill bit circumferential backlash.
3. the anti-down-hole hammer drill bit that circulates in novel full hole according to claim 1 and 2, is characterized in that: between described interior spray orifice is upper and lower two-layer in contiguous interior spray orifice ，Qi lower floor spray orifice compared with spray orifice in upper strata along drill bit circumferential backlash certain angle.
4. the anti-down-hole hammer drill bit that circulates in novel full hole according to claim 3, is characterized in that: in described Dual-layer, between spray orifice, circumferential backlash angle is 20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310557398.4A CN103541662B (en) | 2013-11-08 | 2013-11-08 | A kind of Novel full-hole reverse circulation down-hole hammer drill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310557398.4A CN103541662B (en) | 2013-11-08 | 2013-11-08 | A kind of Novel full-hole reverse circulation down-hole hammer drill |
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| Publication Number | Publication Date |
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| CN103541662A true CN103541662A (en) | 2014-01-29 |
| CN103541662B CN103541662B (en) | 2016-03-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967421A (en) * | 2014-05-28 | 2014-08-06 | 吉林大学 | Strong suction type reverse-circulation coring drill bit |
| CN105350917A (en) * | 2015-12-04 | 2016-02-24 | 吉林大学 | Spiral flow strong suction type reverse circulation coring drill bit |
| CN107035329A (en) * | 2017-05-27 | 2017-08-11 | 重庆泛嘉晟禾工程技术检测有限公司 | A kind of coal mine gas extraction borehole presses wind reacting cycle inward turning emitter |
| CN111535749A (en) * | 2020-06-23 | 2020-08-14 | 西南石油大学 | High-efficient suction drainage type reverse circulation PDC drill bit |
| CN113309472A (en) * | 2021-07-02 | 2021-08-27 | 重庆大学 | Three-channel reverse circulation drill bit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2118150U (en) * | 1992-05-19 | 1992-10-07 | 长春地质学院 | Hydraulic penetrating type impactor |
| US20080029307A1 (en) * | 2004-04-07 | 2008-02-07 | Christopher James Green | Rock Drilling Equipment |
| CN101158266A (en) * | 2007-11-15 | 2008-04-09 | 吉林大学 | Hollow hammer hole bottom strong suction apparatus |
| WO2008055349A1 (en) * | 2006-11-08 | 2008-05-15 | Nd Downhole Technology Ltd. | Reverse nozzle drill bit |
| CN101319599A (en) * | 2008-07-22 | 2008-12-10 | 吉林大学 | Side suction type reverse circulation drilling bit |
| CN102213078A (en) * | 2011-05-16 | 2011-10-12 | 刘展 | Internal spiral nozzle with diversion trench |
| CN103147708A (en) * | 2013-03-27 | 2013-06-12 | 中国水利水电第七工程局成都水电建设工程有限公司 | Through type down hole hammer reverse circulation drilling dust collection device |
-
2013
- 2013-11-08 CN CN201310557398.4A patent/CN103541662B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2118150U (en) * | 1992-05-19 | 1992-10-07 | 长春地质学院 | Hydraulic penetrating type impactor |
| US20080029307A1 (en) * | 2004-04-07 | 2008-02-07 | Christopher James Green | Rock Drilling Equipment |
| WO2008055349A1 (en) * | 2006-11-08 | 2008-05-15 | Nd Downhole Technology Ltd. | Reverse nozzle drill bit |
| CN101158266A (en) * | 2007-11-15 | 2008-04-09 | 吉林大学 | Hollow hammer hole bottom strong suction apparatus |
| CN101319599A (en) * | 2008-07-22 | 2008-12-10 | 吉林大学 | Side suction type reverse circulation drilling bit |
| CN102213078A (en) * | 2011-05-16 | 2011-10-12 | 刘展 | Internal spiral nozzle with diversion trench |
| CN103147708A (en) * | 2013-03-27 | 2013-06-12 | 中国水利水电第七工程局成都水电建设工程有限公司 | Through type down hole hammer reverse circulation drilling dust collection device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967421A (en) * | 2014-05-28 | 2014-08-06 | 吉林大学 | Strong suction type reverse-circulation coring drill bit |
| CN103967421B (en) * | 2014-05-28 | 2016-05-25 | 吉林大学 | A kind of strong pumping formula reverse cycle coring drill bit |
| CN105350917A (en) * | 2015-12-04 | 2016-02-24 | 吉林大学 | Spiral flow strong suction type reverse circulation coring drill bit |
| CN107035329A (en) * | 2017-05-27 | 2017-08-11 | 重庆泛嘉晟禾工程技术检测有限公司 | A kind of coal mine gas extraction borehole presses wind reacting cycle inward turning emitter |
| CN111535749A (en) * | 2020-06-23 | 2020-08-14 | 西南石油大学 | High-efficient suction drainage type reverse circulation PDC drill bit |
| CN113309472A (en) * | 2021-07-02 | 2021-08-27 | 重庆大学 | Three-channel reverse circulation drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103541662B (en) | 2016-03-30 |
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Address after: 116021 No. 1, Floor 2, No. 1, Floor 3, No. 1, Floor 4, No. 186 Shengli Road, Shahekou District, Dalian, Liaoning Patentee after: Dalian survey and Mapping Research Institute Group Co.,Ltd. Address before: 4-5/F, Jindihaijing, No. 188, Shengli Road, Shahekou District, Dalian City, Liaoning Province, 116000 Patentee before: DALIAN ACADEMY OF RECONNAISSANCE AND MAPPING Co.,Ltd. |