CN102913144A - External flat geological drill rod in form of double-top and double-cone connection - Google Patents
External flat geological drill rod in form of double-top and double-cone connection Download PDFInfo
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- CN102913144A CN102913144A CN2012104580026A CN201210458002A CN102913144A CN 102913144 A CN102913144 A CN 102913144A CN 2012104580026 A CN2012104580026 A CN 2012104580026A CN 201210458002 A CN201210458002 A CN 201210458002A CN 102913144 A CN102913144 A CN 102913144A
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Abstract
The invention aims to provide an external flat geological drill rod which can bear relatively high torque, is relatively long in service life and relatively good in sealing effect, is used for gas exploitation and drilling construction in a coal mine and is in a form of double-top and double-cone connection. The drill rod is characterized in that two shoulder surfaces and two conical surfaces are respectively arranged on a male threaded joint and a female threaded joint; and the drill rods are in conical threaded connection with one another. By utilizing the external flat geological drill rod, the twisting resistance and fatigue strength of the drill rod joint are greatly improved; and risks such as threaded sticking, female threaded joint swelling and male threaded joint breakage are reduced.
Description
Technical field
The present invention relates to the coal mine machinery equipment field, particularly a kind of outer level land matter drilling rod that connects for the Double Tops bipyramid form of coal mine gas extraction borehole construction.
Background technology
Traditional drilling rod generally is to produce according to the form of structure of API SPEC7 defined, another that form to cooperate between this drilling rod internal thread and the external screw thread is to circular bead surface, when the rotation of drill string joint cooperates downward drilling well, connector portions branch is subject to larger torsional interaction, the most active force that plus load produces is all born by front several teeth of threaded portion, be easy to occur failure accidents, and process reality is used, and this joint maximum stress is larger as can be known, the stress concentration phenomenon is very serious, and sealing is also very limited.
In the construction of coal mine gas extraction borehole, drilling rod must be the power that feeds of rig and transmission of torque to drill bit.Because drilling rod and bit diameter differ larger, drilling rod will produce flexural deformation, and drill pipe buckling is more serious feeding under the power effect.When the drilling accident such as bit freezing, bury drills occurs when, often to take powerfully to pull out, beat the measures such as sash weight, screw tap salvaging and process, all this kind makes drilling rod be subject to tensile, compressive, bending, the effect of multiple load such as turns round, and often is accompanied by and shakes and impact.Abominable working condition often causes that the drilling rod connecting thread lost efficacy.
Existing drilling rod connects only has male thread joint shoulder plane and box thread tip side facial planes to hold out against, when being subject to larger torque, the mesh tooth face of male thread and box thread is because extruding produces excessive deformation, causes easily connecting thread thread gluing, box thread to swell and the failure phenomenon such as male thread joint breaking.Simultaneously, owing to only have a sealing surface, sealing effectiveness is not fine, in drilling process, causes scouring media to leak.
In order to improve the torsional strength of drilling rod, China Patent Publication No. is CN201705226U's, the utility model patent name is called " a kind of Integral type double-shoulder sulfur resistant drill rod ", a kind of pair of bead drill pipe disclosed, although improved to a certain extent the torsional strength of drilling rod, antitorque general with sealing effectiveness.Along with the increase of drilling depth, more and more higher to the overall performance requirement of drilling rod, and the type of attachment of drilling rod directly affects the effect of drilling construction.Therefore it is higher to need a kind of intensity of design badly, and the life-span is longer, the outer flush drill stem of the better coal bed gas extraction drilling construction of sealing effectiveness.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can bear the outer flush drill stem that more high pulling torque, longer service life, sealing effectiveness better are used for the Double Tops bipyramid type of attachment of coal mine gas extraction borehole construction.
For achieving the above object, the present invention adopts following technical scheme:
The outer level land matter drilling rod of Double Tops bipyramid type of attachment, mainly body, male thread joint 1 and the box thread joint 2 by drilling rod forms, on male thread joint 1 and box thread joint 2, be provided with respectively two circular bead surfaces and two conical surfaces, adopt taper thread to connect between the drilling rod.
Wherein, end and root at described male thread joint 1 are provided with respectively circular bead surface 3 and 5, conical bore bottom and end at described box thread joint 2 also are provided with respectively circular bead surface 6 and 8, after two drilling rods connect, the male and female nipple is under the effect of pretightning force, and four circular bead surfaces have formed two fitting faces 9 and 12 of close contact.
Wherein, drilling rod adopts taper thread to connect, and in male thread joint front portion and box thread joint bottom the cooperation conical surface 4 and 7 is set respectively, and after the male and female nipple connected, under the effect of pretightning force, four conical surfaces formed two fitting faces 10 and 11.
Wherein, the conical surface 4 and 7 tapering are 1:A, and the tapering of male and female screw thread is 1:B, wherein, and 0＜A＜100,0＜B＜100.
The present invention has the following advantages with respect to prior art:
In the prior art, such as Fig. 3, common drilling rod only is provided with respectively a circular bead surface 13 and 14 at male thread joint and box thread joint.And the present invention is provided with respectively circular bead surface 3 and 5 at end and the thread root of male thread joint 1, also is provided with respectively circular bead surface 6 and 8 in conical bore bottom and the end of box thread joint 2.After two drilling rods connect, the male and female nipple is under the effect of pretightning force, four circular bead surfaces have formed two fitting faces 9 and 12 of close contact, when namely box thread end and male thread shoulder place hold out against when drilling rod male and female screw thread is tightened, the interior shoulder place of box thread also holds out against with the end of male thread, formed the dual-top type structure, two antitorque shoulders are provided, the total contact area of its shoulder is much larger than common drilling rod, thereby the moment of torsion that bears is also much larger than common drilling rod, and be improved the application life of drilling rod.Simultaneously, the dual-top type structure makes creeps into scouring media and leaks from inside to outside and need through two sealing surfaces, and leak resistance is large, can more effectively prevent from creeping into the leakage of scouring media, good sealing effect.Greatly improve torsional strength and the fatigue strength of tool joint, reduced Thread-sticking, the box thread joint swells and male thread joint breaking equivalent risk.
And common drilling rod all is to adopt taper thread to be connected with drilling rod of the present invention, and the present invention is provided with respectively again the cooperation conical surface 4 and 7 in male thread joint front portion and box thread joint bottom.After pin and box sub connected, under the effect of pretightning force, four conical surfaces had formed double tapered face structure, had improved the ability of drilling rod transmission axial compression, and the intensity of drilling rod also strengthens greatly.
Description of drawings
Fig. 1 is the structural representation of drilling rod of the present invention;
Fig. 2 is the male and female nipple connection diagram of drilling rod of the present invention;
Fig. 3 is the structural representation of common drilling rod.
Among the figure, 1 is the male thread joint; 2 is the box thread joint; 3 is male thread joint end circular bead surface; 4 connect the procephalic cooperation conical surface for male thread; 5 is male thread joint screw thread root circular bead surface; 6 is box thread joint bottom circular bead surface; 7 is the cooperation conical surface of box thread joint bottom; 8 is box thread joint end circular bead surface; 9 is the fitting face of male thread joint end circular bead surface and box thread joint bottom circular bead surface close contact; 10 and 11 connect the fitting face that cooperates conical surface close contact of the procephalic cooperation conical surface and box thread joint bottom for male thread; 12 is the fitting face of male thread joint screw thread root circular bead surface and box thread joint end circular bead surface close contact; 13 is the circular bead surface of common drilling rod male thread joint; 14 is the circular bead surface of common drilling rod box thread joint.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
A kind of outer level land matter drilling rod of Double Tops bipyramid type of attachment is provided with respectively two circular bead surfaces and two conical surfaces on male thread joint 1 and box thread joint 2, adopt taper thread to connect between the drilling rod.
End and thread root at male thread joint 1 are provided with respectively circular bead surface 3 and 5, also are provided with respectively circular bead surface 6 and 8 in bottom and the end of box thread joint 2.After two drilling rods connected, the male and female nipple was under the effect of pretightning force, and four circular bead surfaces have formed two fitting faces 9 and 12 of close contact.
Drilling rod adopts taper thread to connect, and in male thread joint front portion and box thread joint bottom the cooperation conical surface 4 and 7 is set.After the male and female nipple connected, under the effect of pretightning force, four conical surfaces formed two fitting faces 10 and 11.
The conical surface 4 and 7 tapering are 1:A, and the tapering of male and female screw thread is 1:B.
It is evident that above description and record only are for example rather than in order to limit disclosure of the present invention, application or use.Although described in an embodiment and be described in the drawings embodiment; those having ordinary skill in the art will appreciate that can make various changes and equivalent can replace the element on it and not leave the protection scope of the present invention that limits in the claims, can do any distortion according to instruction of the present invention and not leave its essential scope to adapt to specific environment or material.Therefore, can expect, the present invention does not limit the optimal mode thought at present by accompanying drawing example and the conduct described implementing the specific examples of instruction of the present invention in the specific embodiment, but scope of the present invention will comprise any embodiment of the manual that falls into the front and appended claim.
Claims (4)
1. the outer level land matter drilling rod of a Double Tops bipyramid type of attachment, mainly body, male thread joint (1) and the box thread joint (2) by drilling rod forms, it is characterized in that: on male thread joint (1) and box thread joint (2), be provided with respectively two circular bead surfaces and two conical surfaces, adopt taper thread to connect between the drilling rod.
2. the outer level land matter drilling rod of Double Tops bipyramid type of attachment according to claim 1, it is characterized in that: end and root at described male thread joint (1) are provided with respectively circular bead surface (3) and (5), conical bore bottom and end at described box thread joint (2) also are provided with respectively circular bead surface (6) and (8), after two drilling rods connect, the male and female nipple is under the effect of pretightning force, and four circular bead surfaces have formed two fitting faces (9) and (12) of close contact.
3. the outer level land matter drilling rod of Double Tops bipyramid type of attachment according to claim 1, it is characterized in that: drilling rod adopts taper thread to connect, and bottom male thread joint front portion and box thread joint, the cooperation conical surface (4) and (7) is set respectively, after the male and female nipple connects, under the effect of pretightning force, four conical surfaces form two fitting faces (10) and (11).
4. the outer level land matter drilling rod of Double Tops bipyramid type of attachment according to claim 1, it is characterized in that: the tapering of the conical surface (4) and (7) is 1:A, the tapering of male and female screw thread is 1:B, wherein, 0＜A＜100,0＜B＜100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104580026A CN102913144A (en) | 2012-11-14 | 2012-11-14 | External flat geological drill rod in form of double-top and double-cone connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104580026A CN102913144A (en) | 2012-11-14 | 2012-11-14 | External flat geological drill rod in form of double-top and double-cone connection |
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| Publication Number | Publication Date |
|---|---|
| CN102913144A true CN102913144A (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104580026A Pending CN102913144A (en) | 2012-11-14 | 2012-11-14 | External flat geological drill rod in form of double-top and double-cone connection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060657A (en) * | 2017-06-13 | 2017-08-18 | 天津钢管集团股份有限公司 | The attachment structure of aluminium alloy coring tool inner cylinder nipple |
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|---|---|---|---|---|
| US4537429A (en) * | 1983-04-26 | 1985-08-27 | Hydril Company | Tubular connection with cylindrical and tapered stepped threads |
| US4662659A (en) * | 1983-01-17 | 1987-05-05 | Hydril Company | Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers |
| CN2764922Y (en) * | 2005-01-31 | 2006-03-15 | 宝山钢铁股份有限公司 | Double shoulder metal hermetic sealing drill pipe joint |
| CN200992958Y (en) * | 2007-01-16 | 2007-12-19 | 朴龙华 | Dual shoulder anti-torsion joint |
| CN201144644Y (en) * | 2008-01-18 | 2008-11-05 | 中国石油集团东方地球物理勘探有限责任公司 | Double top type hillside drill stem |
| CN201301671Y (en) * | 2008-10-24 | 2009-09-02 | 西南石油大学 | Double-shoulder drill pipe joint |
| CN201671558U (en) * | 2010-04-23 | 2010-12-15 | 无锡西姆莱斯石油专用管制造有限公司 | Metal spherical sealing double-shoulder oil drill rod connector |
| CN201705226U (en) * | 2010-06-21 | 2011-01-12 | 中国石油天然气集团公司 | Integral type double-shoulder sulfur resistant drill rod |
| CN202900066U (en) * | 2012-11-14 | 2013-04-24 | 中煤科工集团西安研究院 | Externally-flush geological drill rod using double-top double-cone connection form |
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2012
- 2012-11-14 CN CN2012104580026A patent/CN102913144A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4662659A (en) * | 1983-01-17 | 1987-05-05 | Hydril Company | Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers |
| US4537429A (en) * | 1983-04-26 | 1985-08-27 | Hydril Company | Tubular connection with cylindrical and tapered stepped threads |
| CN2764922Y (en) * | 2005-01-31 | 2006-03-15 | 宝山钢铁股份有限公司 | Double shoulder metal hermetic sealing drill pipe joint |
| CN200992958Y (en) * | 2007-01-16 | 2007-12-19 | 朴龙华 | Dual shoulder anti-torsion joint |
| CN201144644Y (en) * | 2008-01-18 | 2008-11-05 | 中国石油集团东方地球物理勘探有限责任公司 | Double top type hillside drill stem |
| CN201301671Y (en) * | 2008-10-24 | 2009-09-02 | 西南石油大学 | Double-shoulder drill pipe joint |
| CN201671558U (en) * | 2010-04-23 | 2010-12-15 | 无锡西姆莱斯石油专用管制造有限公司 | Metal spherical sealing double-shoulder oil drill rod connector |
| CN201705226U (en) * | 2010-06-21 | 2011-01-12 | 中国石油天然气集团公司 | Integral type double-shoulder sulfur resistant drill rod |
| CN202900066U (en) * | 2012-11-14 | 2013-04-24 | 中煤科工集团西安研究院 | Externally-flush geological drill rod using double-top double-cone connection form |
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| Title |
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| 陈庭根等: "《钻井工程理论与技术》", 31 August 2000 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060657A (en) * | 2017-06-13 | 2017-08-18 | 天津钢管集团股份有限公司 | The attachment structure of aluminium alloy coring tool inner cylinder nipple |
| CN107060657B (en) * | 2017-06-13 | 2023-07-04 | 天津钢管制造有限公司 | Connection structure of screwed joint for inner barrel of aluminum alloy coring tool |
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Application publication date: 20130206 |