CN203783490U - Large-diameter double-wall drill pipe - Google Patents
Large-diameter double-wall drill pipe Download PDFInfo
- Publication number
- CN203783490U CN203783490U CN201420111822.2U CN201420111822U CN203783490U CN 203783490 U CN203783490 U CN 203783490U CN 201420111822 U CN201420111822 U CN 201420111822U CN 203783490 U CN203783490 U CN 203783490U
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- sealing
- drilling rod
- inner tube
- joint
- outer tube
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Abstract
The utility model provides a large-diameter double-wall drill pipe which comprises a plurality of drill pipe units, wherein each drill pipe unit comprises an outer pipe and an inner pipe, an external thread joint and an internal thread joint are welded at two ends of a body of the outer pipe respectively, a sealing female joint and a sealing male joint are welded at two ends of a body of the inner pipe respectively, and the inner pipe is suspended in the outer pipe and connected with the outer pipe through a positioning device; the outer pipes of the plurality of drill pipe units are mutually tightened and matched through the external thread joints and the internal thread joints, and the inner pipes are mutually inserted through the sealing female joints and the sealing male joints; inner inserting surfaces are formed in the sealing female joints, each inner inserting surface is provided with two sealing grooves, and sealing rings are embedded into the sealing grooves; outer inserting surfaces are formed in the sealing male joints; and the inner inserting surfaces and the outer inserting surfaces are mutually inserted and matched. The large-diameter double-wall drill pipe has the benefits as follows: mutual rotation and moving between the inner pipes and the outer pipes can be effectively prevented, and the working performance of the drill pipe is improved; and two sealing rings are arranged, so that sealing is guaranteed.
Description
Technical field
The utility model boring tool technical field, refers to a kind of large-caliber double-wall drilling rod especially.
Background technology
Large-caliber double-wall drilling rod is applicable to gas lift reverse circulation and creeps into and down-the-hole hammer reverse circulating drilling process, and traditional drilling rod is made up of inner tube, outer tube and positioner three parts; Outer tube is made up of body, the female adapter that is welded on body two ends and male connection; Inner tube is made up of body and the seal nipple that is welded on body two ends, and inner tube hangs in outer tube, and inner tube relies on positioner and outer tube to be assembled into a complete drilling rod unit.
When drilling rod creeps into work, the internal and external threads of outer tube is worked in coordination and is screwed, the meanwhile seal nipple of inner tube grafting, sealing ring sealing, formation has independent twin-channel drill string, inner and outer pipes annular space is used for to conveying high-pressure air at the bottom of hole, interior pipe orifice is to the gas solid matter that returns cutting carring on earth's surface, creeps into down-the-hole hammer reverse circulating and creeps into thereby implement gas lift reverse circulation.
In above-mentioned drilling rod unit, guarantee that the interior seal of tube is reliable, inner tube does not occur mutually to rotate with outer tube and mutual play is the key point of guaranteeing drilling rod performance and used life, if drilling rod in the time creeping in the seal of tube unreliable, can produce gas leakage pressure release, pressure-air directly enters inner tube from inside and outside annular space, internal and external channel will UNICOM like this, cannot form independently binary channels, affect the performance of drilling rod; In addition, if rotation or play have occurred inner and outer pipes, inner and outer pipes mutually collides and rubs, and is easy to cause inner and outer pipes damage, seal failure, thereby has reduced the application life of drilling rod.Above both of these case all affects carrying out smoothly of drilling rod reverse circulation drilling.
At present, the sealing of double-wall drill pipe and positioning form have a variety of, but mostly have certain deficiency or limitation, are the additional jump rings of inner tube boss such as using maximum a kind of positioning forms, this positioning form can limit inner and outer pipes axial float, but can not limit inner and outer pipes radial rotating; Also having a kind of positioning form is the additional helical structure interference fit of inner tube boss, jump ring, this positioning form can limit rotation can limit again play, locate reliable, but this structure needs interference assembling, can only be applicable to the use of small-bore double-wall drill pipe, for large-caliber double-wall drilling rod, this structure has larger difficulty in the time assembling and the later stage repairs, so also have certain limitation.
In addition, existing double-wall drill pipe generally adopts the sealing of radial seal groove on axle, and the defect of this seal form is the integrality that is difficult for checking sealing ring, after easily causing sealing ring to lose efficacy, because can not find in time it to change, and leak gas, pressure release accident.
Utility model content
The utility model proposes a kind of large-caliber double-wall drilling rod, solved the problem that in prior art, drilling rod inner and outer pipes easily damages, sealing ring easily lost efficacy, application life is short.
The technical solution of the utility model is achieved in that
A kind of large-caliber double-wall drilling rod, comprising: several drilling rod units, and described each drilling rod unit comprises outer tube and inner tube, the body two ends of described outer tube are welded with respectively male connection and female adapter; The body two ends of described inner tube are welded with respectively sealing female joint and sealing male joint; Described inner tube hangs in described outer tube, and is connected with described outer tube by positioner; Described in several, the outer tube of drilling rod unit screws cooperation mutually by described male connection, female adapter, and inner tube is pegged graft mutually by described sealing female joint, sealing male joint; Described sealing female joint is provided with interior plug surface, and described interior plug surface is provided with two seals groove, in described seal groove, is inlaid with sealing ring; Described sealing male joint is provided with outer plug surface; Between described interior plug surface and outer plug surface, mutually peg graft and coordinate.
The first shoulder of described female adapter and the second shoulder of described male connection are bonded to each other; The endoporus of described female adapter is provided with the 3rd shoulder for hanging described inner tube.
In described sealing female joint and sealing male joint, be respectively equipped with 4 for supporting the boss of described inner tube; Described boss is interrupted distribution.
Described positioner comprises jump ring for limiting described outer tube, inner tube axial float and for limiting the bearing pin of described outer tube, inner tube radial rotating.
The top of described the 3rd shoulder be provided with two symmetrical for placing 1/4 hole of bearing pin.
The described boss of described sealing female joint is provided with two for placing 3/4 hole of bearing pin.
The beneficial effects of the utility model are:
By positioner is set between inner and outer pipes, can effectively prevent mutual rotation and play between inner and outer pipes, improve the service behaviour of drilling rod;
By two seals circle is set, make sealing more secure, the sealing means of radial seal groove on hole is more conducive to check and change sealing ring, improve the operating efficiency of changing, can realize reliable location and the sealing of inner and outer tubes, concerning large-caliber double-wall drilling rod, it is more convenient and efficient to assemble, and improves the application life of drilling rod.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of large-caliber double-wall drilling rod described in the utility model;
Fig. 2 is the local structure for amplifying schematic diagram at drill pipe box place in Fig. 1.
In figure:
1, outer tube, 2, inner tube, 3, positioner, 4, male connection, 5, female adapter, 6, sealing female joint, 7, sealing male joint, 8, sealing ring, 9, jump ring, 10, pad, 11, the first shoulder, 12, the second shoulder, 13, the 3rd shoulder, 14, interior plug surface, 15, outer plug surface, 16, boss.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment is as shown in Figure 1 and Figure 2 known, a kind of large-caliber double-wall drilling rod described in the utility model, comprise: several drilling rod units, each drilling rod unit comprises outer tube 1 and inner tube 2, the body two ends of outer tube 1 are welded with respectively male connection 4 and female adapter 5, and the internal thread of joint and external screw thread are the rotation shoulder type screw threads with identical tapering, pitch and geometric parameter; Internal and external threads cooperatively interacts and screws, and under the effect of certain prefastening torque, the first shoulder 11 of female adapter 5 is bonded to each other with the second shoulder 12 of male connection 4, plays sealing function; The endoporus of female adapter 5 is provided with the 3rd shoulder 13 for hanging inner tube 2; The top of the 3rd shoulder 13 be provided with two symmetrical for placing 1/4 hole of bearing pin.
The body two ends of inner tube 2 are welded with respectively sealing female joint 6 and sealing male joint 7, and sealing female joint 6 is provided with interior plug surface 14, and interior plug surface 14 is provided with two seals groove, is inlaid with sealing ring 8 in seal groove; Sealing male joint 7 is provided with outer plug surface 15; Between interior plug surface 14 and outer plug surface 15, mutually peg graft and coordinate, adopt the sealing of radial seal groove on hole, realize the grafting sealing between inner tube.In sealing female joint 6 and sealing male joint 7, be respectively equipped with 4 for supporting the boss 16 of inner tube 2, guarantee that inner tube 2 is positioned at the axial location of outer tube 1 endoporus; Boss 16 is interrupted distribution, still has enough gas passages excessively between guarantee inner tube 2 and outer tube 1; The described boss 16 of sealing female joint 6 is provided with two for placing 3/4 hole of bearing pin.
Above-mentioned inner tube 2 hangs in outer tube 1, and is connected with outer tube 1 by positioner 3, forms a complete drilling rod unit; The outer tube 1 of several drilling rod units screws cooperation mutually by male connection 4, female adapter 5, and the seal nipple of inner tube 2 is pegged graft mutually, and sealing ring 8 seals, and forms and has twin-channel drill string.
Positioner 3 comprises jump ring 9 for limiting outer tube 1, inner tube 2 axial floats and for limiting the bearing pin of outer tube 1, inner tube 2 radial rotatings, within inner tube 2 is set in outer tube 1 time, boss 16 in sealing female joint 6 is fitted with endoporus the 3rd shoulder 13 of outer tube 1 female adapter 5, make 1/4 hole on 3/4 hole and the 3rd shoulder 13 on boss 16 align two complete holes of formation, in hole, penetrate bearing pin, put into again pad 10 and jump ring 9, realized the function of restriction inner tube 2 and outer tube 1 radial rotating and axial float.
In addition, two seals circle 8 is set makes sealing more secure, the sealing means of radial seal groove on hole is more conducive to check and change sealing ring, improve the operating efficiency of changing, can realize reliable location and the sealing of inner tube 2 and outer tube 1, concerning large-caliber double-wall drilling rod, it is more convenient and efficient to assemble.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a large-caliber double-wall drilling rod, it is characterized in that, comprise: several drilling rod units, described each drilling rod unit comprises outer tube (1) and inner tube (2), the body two ends of described outer tube (1) are welded with respectively male connection (4) and female adapter (5); The body two ends of described inner tube (2) are welded with respectively sealing female joint (6) and sealing male joint (7); Described inner tube (2) hangs in described outer tube (1), and is connected with described outer tube (1) by positioner (3); Described in several, the outer tube of drilling rod unit (1) screws cooperation mutually by described male connection (4), female adapter (5), and inner tube (2) is pegged graft mutually by described sealing female joint (6), sealing male joint (7); Described sealing female joint (6) is provided with interior plug surface (14), and described interior plug surface (14) is provided with two seals groove, is inlaid with sealing ring (8) in described seal groove; Described sealing male joint (7) is provided with outer plug surface (15); Between described interior plug surface (14) and outer plug surface (15), mutually peg graft and coordinate.
2. a kind of large-caliber double-wall drilling rod according to claim 1, is characterized in that, first shoulder (11) of described female adapter (5) is bonded to each other with second shoulder (12) of described male connection (4); The endoporus of described female adapter (5) is provided with the 3rd shoulder (13) for hanging described inner tube (2).
3. a kind of large-caliber double-wall drilling rod according to claim 1, is characterized in that, in described sealing female joint (6) and sealing male joint (7), is respectively equipped with 4 for supporting the boss (16) of described inner tube (2); Described boss (16) is interrupted distribution.
4. a kind of large-caliber double-wall drilling rod according to claim 1, it is characterized in that, described positioner (3) comprises jump ring (9) for limiting described outer tube (1), inner tube (2) axial float and for limiting the bearing pin of described outer tube (1), inner tube (2) radial rotating.
5. a kind of large-caliber double-wall drilling rod according to claim 2, is characterized in that, the top of described the 3rd shoulder (13) be provided with two symmetrical for placing 1/4 hole of bearing pin.
6. a kind of large-caliber double-wall drilling rod according to claim 3, is characterized in that, the described boss (16) of described sealing female joint (6) is provided with two for placing 3/4 hole of bearing pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111822.2U CN203783490U (en) | 2014-03-12 | 2014-03-12 | Large-diameter double-wall drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111822.2U CN203783490U (en) | 2014-03-12 | 2014-03-12 | Large-diameter double-wall drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783490U true CN203783490U (en) | 2014-08-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420111822.2U Expired - Fee Related CN203783490U (en) | 2014-03-12 | 2014-03-12 | Large-diameter double-wall drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783490U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194045A (en) * | 2016-09-21 | 2016-12-07 | 库尔勒施得石油技术服务有限公司 | Drilling rod |
| CN106837202A (en) * | 2017-04-13 | 2017-06-13 | 长沙矿山研究院有限责任公司 | The geological prospecting double-layer drill rod and its supporting drilling tool cored for negative pressure |
| CN106894769A (en) * | 2017-03-06 | 2017-06-27 | 中国石油大学(华东) | A kind of fast joint type double-layer drill rod |
| CN106930703A (en) * | 2017-03-16 | 2017-07-07 | 新疆格瑞迪斯石油技术股份有限公司 | Reverse circulating drilling tool encapsulating method |
| CN108894732A (en) * | 2018-09-21 | 2018-11-27 | 黄桂霞 | Double-wall drill pipe |
| CN109458129A (en) * | 2017-08-27 | 2019-03-12 | 上海城地建设股份有限公司 | A kind of spiral drill and its construction method with level monitoring |
| CN109736718A (en) * | 2019-01-30 | 2019-05-10 | 南通永大管业股份有限公司 | It is a kind of to stablize removable boring rod set |
| CN111441729A (en) * | 2020-04-23 | 2020-07-24 | 东营威玛石油钻具有限公司 | Detachable high-sealing double-wall drill rod |
| CN113090200A (en) * | 2021-05-12 | 2021-07-09 | 中煤特殊凿井有限责任公司 | Interpolation tuber pipe connects and tuber pipe suitable for large-scale shaft rig quick assembly disassembly |
| CN113389499A (en) * | 2021-07-20 | 2021-09-14 | 中煤科工集团重庆研究院有限公司 | Double-wall drill rod and machining method thereof |
-
2014
- 2014-03-12 CN CN201420111822.2U patent/CN203783490U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194045B (en) * | 2016-09-21 | 2019-01-18 | 库尔勒施得石油技术服务有限公司 | Drilling rod |
| CN106194045A (en) * | 2016-09-21 | 2016-12-07 | 库尔勒施得石油技术服务有限公司 | Drilling rod |
| CN106894769B (en) * | 2017-03-06 | 2019-06-21 | 中国石油大学(华东) | A kind of fast joint type double-layer drill rod |
| CN106894769A (en) * | 2017-03-06 | 2017-06-27 | 中国石油大学(华东) | A kind of fast joint type double-layer drill rod |
| CN106930703A (en) * | 2017-03-16 | 2017-07-07 | 新疆格瑞迪斯石油技术股份有限公司 | Reverse circulating drilling tool encapsulating method |
| CN106930703B (en) * | 2017-03-16 | 2018-12-07 | 新疆格瑞迪斯石油技术股份有限公司 | Reverse circulating drilling tool encapsulating method |
| CN106837202A (en) * | 2017-04-13 | 2017-06-13 | 长沙矿山研究院有限责任公司 | The geological prospecting double-layer drill rod and its supporting drilling tool cored for negative pressure |
| CN109458129A (en) * | 2017-08-27 | 2019-03-12 | 上海城地建设股份有限公司 | A kind of spiral drill and its construction method with level monitoring |
| CN108894732A (en) * | 2018-09-21 | 2018-11-27 | 黄桂霞 | Double-wall drill pipe |
| CN109736718A (en) * | 2019-01-30 | 2019-05-10 | 南通永大管业股份有限公司 | It is a kind of to stablize removable boring rod set |
| CN111441729A (en) * | 2020-04-23 | 2020-07-24 | 东营威玛石油钻具有限公司 | Detachable high-sealing double-wall drill rod |
| CN113090200A (en) * | 2021-05-12 | 2021-07-09 | 中煤特殊凿井有限责任公司 | Interpolation tuber pipe connects and tuber pipe suitable for large-scale shaft rig quick assembly disassembly |
| CN113389499A (en) * | 2021-07-20 | 2021-09-14 | 中煤科工集团重庆研究院有限公司 | Double-wall drill rod and machining method thereof |
| CN113389499B (en) * | 2021-07-20 | 2024-03-22 | 中煤科工集团重庆研究院有限公司 | Double-wall drill rod and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20160312 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |