CN103161414A - Safe dismantling device of smooth round drill pipe and method thereof - Google Patents
Safe dismantling device of smooth round drill pipe and method thereof Download PDFInfo
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- CN103161414A CN103161414A CN2013100990948A CN201310099094A CN103161414A CN 103161414 A CN103161414 A CN 103161414A CN 2013100990948 A CN2013100990948 A CN 2013100990948A CN 201310099094 A CN201310099094 A CN 201310099094A CN 103161414 A CN103161414 A CN 103161414A
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- inner core
- steel ball
- connecting rod
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- drilling rod
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 210000000078 claw Anatomy 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a safe dismantling device of a smooth round drill pipe and a method thereof. The safe dismantling device comprises a connecting rod, an inner cylinder, a sliding sleeve, a clamping steel ball and a limit bolt. The connecting rod consists of the two parts of a central rod and a claw. One end of the inner cylinder is sleeved on the connecting rod in an inlaid mode and can slide axially on the connecting rod, the claw of the connecting rod is inserted into a notch of the inner cylinder, a round hole is formed at the other end of the inner cylinder, and the clamping steel ball is placed in the hole. The sliding sleeve is sleeved at the holed end of the inner cylinder and can slide axially at the holed end of the inner cylinder to extrude the clamping steel ball so that the clamping steel ball can clamp a square opening of the smooth round drill pipe. According to the safe dismantling device, based on the structural feature that the square opening is formed at the male thread end of the smooth round drill pipe, the clamping steel ball is adopted to clamp the square opening of the drill pipe, and the smooth round drill pipe is dismantled by means of the torque force of a hydraulic drilling rig. Therefore, not only is the dismantling efficiency of the smooth round drill pipe improved, but also hidden safety troubles in the dismantling process of the drill pipe are eliminated.
Description
Technical field
The drill rig components, particularly mining construction extraction borehole that the present invention relates to use in mine production used a kind of light face round bur bar dismounting device and method of hydraulic drill rig.
Background technology
Coal mine gas drainage mainly adopts the hydraulic drill rig extraction borehole of constructing in coal (rock) layer, coal-bed gas is carried out release, reaches the purpose of administering gas.For a long time, the extraction borehole construction adopts preposition water to distinguish that the axle hydraulic drill rig coordinates the construction of light face round bur bar mostly, the extraction borehole of constructing often needs tens to hundreds of root drilling rod, adopt between drilling rod and be threaded, drilling construction is to design attitude, drilling rod need to take apart in the hole by root, main artificial clamper, the fork spanner manpower of adopting of drilling rod dismounting for a long time dismantled, wherein artificial clamper is used for a drilling rod in holes for clamping, the fork spanner chucking manually provides the torsion dismounting after needing the four directions mouth of dismounting drilling rod.Waste time and energy at unloading process, in case and rig operation driver maloperation appears, start rig and drive the fork spanner counter-rotating, very easily cause the employee of dismounting drilling rod injured, even cause death by accident.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency of existing light face round bur bar dismounting technique, provide a kind of light face round bur bar dismounting device, with quick, dismounting light face round bur bar.
Technical scheme of the present invention is as follows:
A kind of light face round bur bar dismounting device, comprise connecting rod, inner core, sliding sleeve, screens steel ball and caging bolt, this device is to utilize light face round bur bar male thread end that the design feature of four directions mouth is arranged, adopt the screens steel ball to block cubic mouthful of drilling rod, by hydraulic drill rig self torsion dismounting light face round bur bar.
Described connecting rod is divided into water and distinguishes axle and claw two parts, wherein water distinguishes that axle is that rig water commonly used is distinguished axle, water is a cylinder axostylus axostyle in the middle of distinguishing axle, front end is the end of thread that is connected with drilling rod, the rear end is the link that is connected with chuck of rig, claw is symmetrically welded at cylinder axostylus axostyle both sides, and claw plays the effect of restriction circumferential movement.
Described inner core one end edge is enclosed within on connecting rod, can do with connecting rod and endwisely slip, the connecting rod claw inserts in the inner core breach, inner core and connecting rod are rotated simultaneously, transmission fluid drilol press torsion, the inner core other end is arranged symmetrically with at least two circular holes, and circular hole bottom arranges limited step, places the screens steel ball that diameter is slightly less than the circular hole opening diameter in circular hole.
Described sliding sleeve is enclosed within inner core and arranges a round-meshed end, can do at this end and endwisely slip, and in the rear and front end of the circular hole position of this end, position limiting structure is set respectively, the front end position limiting structure is arranged on the caging bolt on inner core, the rear end position limiting structure is that processing is at the second limited step of cylinder outer wall, slide over sliding distance on inner core by the restriction of the second limited step and caging bolt, this distance does not drop out in the hole with the screens steel ball and is as the criterion; When sliding into the inner core position of opening when sliding sleeve, extruding screens steel ball can make the screens steel ball radially move in the hole, blocks cubic mouthful of drilling rod, by hydraulic drill rig self torsion dismounting light face round bur bar.
A kind of using method of light face round bur bar dismounting device is characterized in that comprising the following steps:
1) after borehole drilling proceeds to design attitude, take off rig water and distinguish assembly, light face round bur bar dismounting device is installed, after the rig power end is advanced into light face round bur bar position, the chuck of rig forward, make the connecting rod male thread be connected but not tighten with light face round bur bar box thread, light face round bur bar to piece run of steel position in tractor hole;
2) the slip inner core to drilling rod four directions mouthful place, make mouthful position, screens steel ball alignment light face round bur bar four directions, promote sliding sleeve, press down the screens steel ball and make the screens steel ball compress drilling rod four directions mouthful, restriction drilling rod and inner core relative to circumferentially rotating.
3) dismounting personnel operation rig manual clamper makes second of clamper chucking drilling rod four directions mouthful, and rig driver operation rig makes the chuck of rig counter-rotating, unclamps being connected of first drilling rod and second drilling rod.
4) slip sliding sleeve unclamps being connected of inner core and drilling rod four directions mouthful, and the first drilling rod and taking off of manually reversing repeats above step and take off successively and remain drilling rod in the hole in.
Use the present invention, dismounting light face round bur bar can be completed with the rig self power, easy to operate, reduce labor intensive simultaneously, shorten the take-down time, reduce the security risk that adopts the fork spanner artificial unloading, application shows: adopt the present invention, the dismounting light face round bur bar time can shorten 30%, has stopped light face round bur bar dismounting security incident.
Description of drawings
Fig. 1 is the schematic diagram of connecting rod;
Fig. 2 is the schematic diagram of inner core;
Fig. 3 is the sectional drawing of A-A section in Fig. 2;
Fig. 4 is the schematic diagram of sliding sleeve;
Fig. 5 is the sectional drawing for B-B section in Fig. 4;
Fig. 6 is confined state 1 schematic diagram of a kind of light face of the present invention round bur bar dismounting device;
Fig. 7 is confined state 2 schematic diagrames of a kind of light face of the present invention round bur bar dismounting device;
In figure, connecting rod 1, inner core 2, sliding sleeve 3, screens steel ball 4, caging bolt 5, light face round bur bar 6, center-pole 1-1, claw 1-2, breach 2-1, circular hole 2-2, the first limited step 2-3, the second limited step 2-4.
The specific embodiment
Now by reference to the accompanying drawings the present invention is described in further detail.
As Fig. 1～shown in Figure 5, light face round bur bar dismounting device comprises connecting rod 1, inner core 2, sliding sleeve 3, screens steel ball 4 and caging bolt 5, it utilizes light face round bur bar male thread end that the design feature of four directions mouth is arranged, adopt screens steel ball 4 to block cubic mouthful of drilling rod, by hydraulic drill rig self torsion dismounting light face round bur bar 6.
Connecting rod 1 is divided into center-pole 1-1 and claw 1-2 two parts, and wherein center-pole 1-1 is that rig water commonly used is distinguished axle, and claw 1-2 is symmetrically welded at center-pole 1-1 both sides, and connecting rod 1 one ends are connected with chuck of rig, transmit rig torsion.
As Fig. 6, shown in Figure 7, inner core 2 one end edges are enclosed within on connecting rod 1, can do with connecting rod 1 and endwisely slip, connecting rod claw 1-2 inserts in the breach 2-1 of inner core, inner core 2 and connecting rod 1 are rotated simultaneously, transmission fluid drilol press torsion, inner core 2 other ends are arranged symmetrically with 4 circular hole 2-2, the circular hole bottom arranges the first limited step 2-3, places the screens steel ball 4 that 4 diameters are slightly less than the circular hole opening diameter in circular hole.Sliding sleeve 3 is enclosed within inner core 2 and arranges a round-meshed end, can do at this end and endwisely slip, and in the rear and front end of the circular hole position of this end, position limiting structure is set respectively, the front end position limiting structure is arranged on the caging bolt 5 on inner core 2, the rear end position limiting structure is that processing is at the second limited step 2-4 of cylinder 2 outer walls, by the sliding distance of the second limited step 2-4 and caging bolt 5 restriction sliding sleeves 3 on inner core 2, this distance does not drop out in the hole with screens steel ball 4 and is as the criterion; When sliding sleeve 3 slides into inner core 2 position of opening, extruding screens steel ball 4 can make screens steel ball 4 radially move in the hole, blocks cubic mouthful of drilling rod, by hydraulic drill rig self torsion dismounting light face round bur bar 6.
The mode of occupation of this provision for disengagement is as follows:
1) after borehole drilling proceeds to design attitude, take off rig water and distinguish assembly, light face round bur bar dismounting device is installed, after the rig power end is advanced into light face round bur bar 6 positions, the chuck of rig forward, make the male thread of connecting rod 1 be connected but not tighten with the box thread of light face round bur bar 6,6 to one, light face round bur bar run of steel position in tractor hole;
2) slip inner core 2 to drilling rod four directions mouthful place, make 4 screens steel balls 4 alignment light face round bur bar 6 mouthful positions, four directions, promote sliding sleeve 3, press down screens steel ball 4 and make screens steel ball 4 compress drilling rod four directions mouthful, restriction drilling rod and inner core 2 relative to circumferentially rotating.
3) dismounting personnel operation rig manual clamper makes second of clamper chucking drilling rod four directions mouthful, and rig driver operation rig makes the chuck of rig counter-rotating, unclamps being connected of first drilling rod and second drilling rod.
4) the slip sliding sleeve 3, unclamp being connected of inner core 2 and drilling rod four directions mouthful, and the first drilling rod and taking off of manually reversing repeats above step and take off successively and remain drilling rod in the hole in.
Claims (2)
1. a light face round bur bar dismounting device, comprise connecting rod (1), inner core (2), sliding sleeve (3), screens steel ball (4) and caging bolt (5), it is characterized in that:
Described connecting rod (1) has center-pole (1-1) and claw (1-2) two parts, wherein a cylindrical body of rod in the middle of center-pole (1-1), front end is the end of thread that is connected with drilling rod, and the rear end is the link that is connected with chuck of rig, and claw (1-2) is symmetrically welded at cylindrical body of rod both sides;
described inner core (2) one end edges are enclosed within on connecting rod (1), can do with connecting rod (1) and endwisely slip, the claw of connecting rod (1-2) inserts in the breach (2-1) of inner core (2), inner core (2) and connecting rod (1) are rotated simultaneously, transmission fluid drilol press torsion, the other end of inner core (2) is arranged symmetrically with at least two circular holes (2-2), place respectively the screens steel ball (5) that diameter is slightly less than the circular hole opening diameter in circular hole, the circular hole bottom arranges the first limited step (2-3), the diameter in the hole that the first limited step (2-3) surrounds is less than the diameter of screens steel ball,
Described sliding sleeve (3) is enclosed within inner core (2) and arranges a round-meshed end, can do at this end and endwisely slip, and in the rear and front end of the circular hole position of this end, position limiting structure is set respectively, the front end position limiting structure is arranged on the caging bolt (5) on inner core (2), the rear end position limiting structure is that processing is at second limited step (2-4) of cylinder (2) outer wall, by the sliding distance of the second limited step (2-4) and caging bolt (5) restriction sliding sleeve (3) on inner core (2), this distance does not drop out in the hole with screens steel ball (4) and is as the criterion; When sliding into inner core (2) position of opening when sliding sleeve (3), extruding screens steel ball (4) can make screens steel ball (4) radially move in the hole, blocks cubic mouthful of drilling rod, by hydraulic drill rig self torsion dismounting light face round bur bar (6).
2. the using method of a light face round bur bar dismounting device is characterized in that comprising the following steps:
1) after borehole drilling proceeds to design attitude, taking off rig water distinguishes, described light face round bur bar dismounting device is installed, specifically connecting rod (1) rear end with light face round bur bar dismounting device is connected with chuck of rig, after light face round bur bar dismounting device is advanced into light face round bur bar (6) position, the chuck of rig forward, make the male thread of connecting rod (1) front end be connected but not tighten with the box thread of light face round bur bar (6), then in tractor hole light face round bur bar (6) to a run of steel position;
2) slip inner core (2) is to mouthful place, four directions of light face round bur bar (6), make mouthful position, screens steel ball (4) alignment light face round bur bar (6) four directions, promote sliding sleeve (3), press down screens steel ball (4) and make screens steel ball (4) compress drilling rod four directions mouthful, restriction drilling rod and inner core (2) relative to circumferentially rotating;
3) operation rig manual clamper makes the four directions mouthful of second drilling rod of clamper chucking, and the operation rig makes the chuck of rig counter-rotating, unclamps being connected of first drilling rod and second drilling rod;
4) slip sliding sleeve (3) unclamps being connected of inner core (2) and drilling rod four directions mouthful, and first drilling rod and taking off of manually reversing repeats above step and take off successively and remain drilling rod in the hole in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100990948A CN103161414A (en) | 2013-03-26 | 2013-03-26 | Safe dismantling device of smooth round drill pipe and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100990948A CN103161414A (en) | 2013-03-26 | 2013-03-26 | Safe dismantling device of smooth round drill pipe and method thereof |
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| Publication Number | Publication Date |
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| CN103161414A true CN103161414A (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013100990948A Pending CN103161414A (en) | 2013-03-26 | 2013-03-26 | Safe dismantling device of smooth round drill pipe and method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064932A (en) * | 2015-06-30 | 2015-11-18 | 中煤科工集团西安研究院有限公司 | Drilling rod loosening device for tunnel drilling machine |
| CN105239937A (en) * | 2015-09-23 | 2016-01-13 | 中煤科工集团西安研究院有限公司 | Multifunctional manual clamp holder for drilling rig |
| CN106014276A (en) * | 2016-04-29 | 2016-10-12 | 河北川安煤矿机械制造有限公司 | Fast-separation drill bushing of pneumatic drilling machine applied in coal mine |
| CN111155947A (en) * | 2019-12-31 | 2020-05-15 | 安徽恒立通液压气动技术有限公司 | Multi-stage drill pipe dismantling device and dismantling method for frame column drilling rig |
| CN111395977A (en) * | 2020-04-22 | 2020-07-10 | 山东聚龙装备制造有限公司 | Quick connecting and separating mechanism for forward and reverse rotation power transmission of vertical shaft and hexagonal rod of drilling machine |
| CN114658377A (en) * | 2022-03-24 | 2022-06-24 | 承德石油高等专科学校 | A well cleaning device for oilfield production wells |
| CN115228556A (en) * | 2022-07-27 | 2022-10-25 | 迈安德集团有限公司 | Split crusher roller and quick disassembling and assembling method thereof |
| CN117309465A (en) * | 2023-10-08 | 2023-12-29 | 廊坊市诚信地质服务有限公司 | Deep geological sample sampling device and sampling method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985000634A1 (en) * | 1983-07-28 | 1985-02-14 | Brissonneau Et Lotz Marine | Power tong for the connection of drilling pipes |
| CN2599212Y (en) * | 2003-02-28 | 2004-01-14 | 江源 | Sleeve type drill rod fastener dismount apparatus |
| CN201152426Y (en) * | 2008-01-14 | 2008-11-19 | 河南海力特机电制造有限公司 | Fast joint for pipeline |
| CN102635320A (en) * | 2012-05-21 | 2012-08-15 | 重庆松藻煤电有限责任公司 | Quick arc-shaped raised-edge drill rod dismounting device and method |
| CN102966319A (en) * | 2012-11-23 | 2013-03-13 | 重庆松藻煤电有限责任公司 | Drill rod detaching device for hydraulic rig |
| CN203271635U (en) * | 2013-03-26 | 2013-11-06 | 重庆松藻煤电有限责任公司 | Safe dismounting device for smooth round drill rod |
-
2013
- 2013-03-26 CN CN2013100990948A patent/CN103161414A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985000634A1 (en) * | 1983-07-28 | 1985-02-14 | Brissonneau Et Lotz Marine | Power tong for the connection of drilling pipes |
| CN2599212Y (en) * | 2003-02-28 | 2004-01-14 | 江源 | Sleeve type drill rod fastener dismount apparatus |
| CN201152426Y (en) * | 2008-01-14 | 2008-11-19 | 河南海力特机电制造有限公司 | Fast joint for pipeline |
| CN102635320A (en) * | 2012-05-21 | 2012-08-15 | 重庆松藻煤电有限责任公司 | Quick arc-shaped raised-edge drill rod dismounting device and method |
| CN102966319A (en) * | 2012-11-23 | 2013-03-13 | 重庆松藻煤电有限责任公司 | Drill rod detaching device for hydraulic rig |
| CN203271635U (en) * | 2013-03-26 | 2013-11-06 | 重庆松藻煤电有限责任公司 | Safe dismounting device for smooth round drill rod |
Non-Patent Citations (1)
| Title |
|---|
| 吴万荣: "潜孔钻机全液压接卸钻杆装置的研制", 《中南工业大学学报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064932A (en) * | 2015-06-30 | 2015-11-18 | 中煤科工集团西安研究院有限公司 | Drilling rod loosening device for tunnel drilling machine |
| CN105064932B (en) * | 2015-06-30 | 2017-07-07 | 中煤科工集团西安研究院有限公司 | Underground drill rig drilling rod releases device |
| CN105239937A (en) * | 2015-09-23 | 2016-01-13 | 中煤科工集团西安研究院有限公司 | Multifunctional manual clamp holder for drilling rig |
| CN106014276A (en) * | 2016-04-29 | 2016-10-12 | 河北川安煤矿机械制造有限公司 | Fast-separation drill bushing of pneumatic drilling machine applied in coal mine |
| CN106014276B (en) * | 2016-04-29 | 2024-04-05 | 河北川安煤矿机械制造有限公司 | Quick separation drill bushing of pneumatic drilling machine for coal mine |
| CN111155947A (en) * | 2019-12-31 | 2020-05-15 | 安徽恒立通液压气动技术有限公司 | Multi-stage drill pipe dismantling device and dismantling method for frame column drilling rig |
| CN111395977A (en) * | 2020-04-22 | 2020-07-10 | 山东聚龙装备制造有限公司 | Quick connecting and separating mechanism for forward and reverse rotation power transmission of vertical shaft and hexagonal rod of drilling machine |
| CN114658377A (en) * | 2022-03-24 | 2022-06-24 | 承德石油高等专科学校 | A well cleaning device for oilfield production wells |
| CN114658377B (en) * | 2022-03-24 | 2023-08-18 | 承德石油高等专科学校 | Well flushing device for oilfield production well |
| CN115228556A (en) * | 2022-07-27 | 2022-10-25 | 迈安德集团有限公司 | Split crusher roller and quick disassembling and assembling method thereof |
| CN117309465A (en) * | 2023-10-08 | 2023-12-29 | 廊坊市诚信地质服务有限公司 | Deep geological sample sampling device and sampling method |
| CN117309465B (en) * | 2023-10-08 | 2024-04-05 | 廊坊市诚信地质服务有限公司 | Deep geological sample sampling device and sampling method |
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Application publication date: 20130619 |