CN2475812Y - A mono-cone rotary drill bit capable of drill super-size borehole well - Google Patents
A mono-cone rotary drill bit capable of drill super-size borehole well Download PDFInfo
- Publication number
- CN2475812Y CN2475812Y CN 01214615 CN01214615U CN2475812Y CN 2475812 Y CN2475812 Y CN 2475812Y CN 01214615 CN01214615 CN 01214615 CN 01214615 U CN01214615 U CN 01214615U CN 2475812 Y CN2475812 Y CN 2475812Y
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- tooth
- bit
- drill bit
- cone
- utility
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Abstract
The utility model relates to a single cone bit for drilling oversize borehole which can drill on the crust, mainly consisting of a bit body 1 and a cone 2. The bit body is provided with a bit stalk 7, a connection thread 3 and a cone journal 4, etc. The cone is inlayed with a tooth 5 which can crush the rock, an envelope surface 6 of the tooth addendum or a cone cloth tooth surface 8 is spherical surface. The utility model is characterized in that the spherical center O of the spherical surface migrates from the center line B of the connection thread, the offset is e, the value range of e is 1mm-10mm. The utility model has the advantage of simple structure, and the utility model can use minor diameter bit to drill large diameter borehole, thus the drilling process can be improved beneficially, the drilling cost can be decreased and the cementing success rate can be increased.
Description
The utility model relates to the single-cone rotary drill bit that is used for drilling well on the earth's crust, particularly relates to a kind of single-cone rotary drill bit that can beat the over dimensioning well.
Single-cone rotary drill bit is mainly formed (Chinese utility model patent 96233451.0) by bit body and spherical gear wheel usually, bit sub is arranged on the bit body, tooth pawl and gear claw journal etc., be installed with the tooth of energy fractured rock on the gear wheel, bit sub and top screw thread are used for making drill bit to link to each other with drilling rod, tooth pawl and gear claw journal are to support and drive the carrier of gear wheel around the rotation of drill bit rotation, and gear wheel and top tooth thereof are the body element of drill bit fractured rock.When drill bit was worked, gear wheel both revolved round the sun around the drill bit rotation with the gear claw journal road, and again around the gear claw journal rotation, the tooth on the gear wheel produces impact, is pressed into and scrapes broken rock effects such as crowded bottom rock under this composite motion state.If the enveloping surface of gear wheel upper teeth tooth top is a sphere, this spherical diameter is exactly a bit diameter.When the widely different commentaries on classics center of the centre of sphere of sphere and drill bit overlapped, at this moment the shaft bottom that drill bit got out was a hemisphere face, and borehole diameter also just equals bit diameter.
Slimhole drilling can reduce drilling cost significantly, improve the petroleum resources exploration and development benefit, but SLIM-HOLE DRILLING TECHNOLOGY apply that as was expected far away rapidly and extensively, one of them major reason is exactly to follow with slimhole drilling and recover the oil relevant a series of supporting technologies and technological equipment not require.For example, slim-hole well cementation is exactly the big technical barrier in the current popularization SLIM-HOLE DRILLING TECHNOLOGY, in the well of be drilled to 6 inches or 57/8 English head 152.4 millimeters or 149.2 millimeters, is lowered to 5 inches sleeve pipes or the annular space of tail pipe at the box cupling place has only 8～11 millimeters.If wellbore quality is bad, or sleeve pipe is lowered to off-centre, and then monolateral gap is inevitable less than 5.5 millimeters, even is reduced to 0.In this case, guarantee that the cement paste constant speed of returning advances, evenly distribute, almost be impossible.Address this problem, except improving the technical level of well cementation, improve outside the mobile performance of cement paste, increasing borehole diameter also is a kind of method of extensive employing.Therefore, drilling well circle requires to adopt can beat the drill bit of over dimensioning well, and promptly the small-diameter sized drill bit is got major diameter size well, once gets out satisfactory well.
The purpose of this utility model just provides a kind of single-cone rotary drill bit that can beat the over dimensioning well, both simple in structure, reduction drilling cost, can increase borehole diameter effectively again, satisfy and have now and drilling well, the recover the oil relevant a series of supporting technologies and the requirement of technological equipment, thereby improve drilling technology, improve the well cementation success rate.
For achieving the above object, the utility model by the following technical solutions.
A kind of single-cone rotary drill bit that can beat the over dimensioning well, mainly form by bit body and gear wheel, bit sub is arranged on the bit body, connect screw thread and gear claw journal etc., be installed with the tooth of energy fractured rock on the gear wheel, the enveloping surface of tooth tooth top or the gear wheel cloth flank of tooth are sphere, it is characterized in that the centre of sphere O skew of sphere connects the center line B of screw thread, its deviant is e.When drill bit rotates, the line B of thread center is exactly the rotation centerline of drill bit, because the enveloping surface of tooth tooth top or the centre of sphere O of the gear wheel cloth flank of tooth do not overlap with rotation centerline B, when the drill bit rotary drilling, the borehole diameter D that drill bit gets out can be greater than tooth envelope spherical diameter d, and two diameter differences are D-d=2e.
The span of e is 1 millimeter～15 millimeters, is preferably 3 millimeters～10 millimeters.In actual use, can adjust it according to the size of drill bit, in general, its bit size is big, the just desirable higher value of e.
The utility model is compared with the single-cone rotary drill bit of routine, has the following advantages: (1) its component parts is identical with existing single-cone rotary drill bit, and is simple and reliable for structure; (2) can utilize the small-diameter sized drill bit to get major diameter size well, reduce drilling well one-tenth
This satisfies existing and drilling well, a series of supporting technologies and technological equipment that oil recovery is relevant
Requirement, thereby improve drilling technology, improve the well cementation success rate; (3) but the different deviant e of flexible design satisfies different drilling well needs.
Accompanying drawing 1 is a kind of structural representation that can beat the single-cone rotary drill bit of over dimensioning well of the utility model.
Accompanying drawing 2 is a kind of working state schematic representations that can beat the single-cone rotary drill bit of over dimensioning well of the utility model.
Further specify the utility model below in conjunction with accompanying drawing.
A kind of single-cone rotary drill bit that can beat the over dimensioning well among Fig. 1, mainly be made up of bit body 1 and gear wheel 2, bit body has bit sub 7, connects screw thread 3, gear claw journal 4, gear claw journal axis A with connect axis of thread B and intersect at the P point, gear wheel 2 is assemblied on the gear claw journal 4, and can rotate flexibly.Be installed with the tooth 5 of tens of energy fractured rocks on the gear wheel, the enveloping surface 6 or the tooth cloth flank of tooth 8 that the tooth tooth top forms are sphere, and centre of sphere O departs from and connects screw thread 3 center line B (drill bit rotation), and its side-play amount is e.The borehole diameter D that drill bit gets out can be greater than tooth envelope spherical diameter d, and two diameter differences are D-d=2e.
A kind of single-cone rotary drill bit that can beat the over dimensioning well among Fig. 2 mainly is made up of bit body 1 and gear wheel 2, and bit body has bit sub 7, connects screw thread 3 and gear claw journal 4, gear claw journal 4 axis A with connect screw thread 3 axis B not in same plane, e apart in the space.Gear wheel 2 is assemblied on the gear claw journal 4, and can rotate flexibly.Be installed with the tooth 5 of tens of energy fractured rocks on the gear wheel.The sphere centre of sphere O of the enveloping surface 6 that gear claw journal 4 axis A form by the tooth tooth top or the cloth flank of tooth 8 of tooth, therefore, centre of sphere O departs from the center line B (drill bit rotation) that connects screw thread 3, and its side-play amount is e.
Claims (2)
- The 1 one kinds of single-cone rotary drill bits that can beat the over dimensioning well, mainly form by bit body (1) and gear wheel (2), bit sub (7) is arranged on the bit body, connect screw thread (3) and gear claw journal (4) etc., be installed with the tooth (5) of energy fractured rock on the gear wheel (2), the enveloping surface of tooth tooth top (6) or the gear wheel cloth flank of tooth (8) are sphere, it is characterized in that, the centre of sphere O skew of sphere connects the center line B of screw thread (3), its deviant is e, and the span of e is 1 millimeter～15 millimeters.
- 2 drill bits as claimed in claim 1 is characterized in that, the span of e is 3 millimeters～10 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01214615 CN2475812Y (en) | 2001-03-30 | 2001-03-30 | A mono-cone rotary drill bit capable of drill super-size borehole well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01214615 CN2475812Y (en) | 2001-03-30 | 2001-03-30 | A mono-cone rotary drill bit capable of drill super-size borehole well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2475812Y true CN2475812Y (en) | 2002-02-06 |
Family
ID=33633346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01214615 Expired - Fee Related CN2475812Y (en) | 2001-03-30 | 2001-03-30 | A mono-cone rotary drill bit capable of drill super-size borehole well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2475812Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091531A1 (en) * | 2002-04-23 | 2003-11-06 | Kingdream Public Ltd. Co. | A roller bit with a journal pin offset from the central axis thereof |
| CN1308566C (en) * | 2004-06-23 | 2007-04-04 | 江汉石油钻头股份有限公司 | Cone single roller bit |
| CN103541660A (en) * | 2013-11-07 | 2014-01-29 | 西南石油大学 | Composite type eccentric one-cone bit |
-
2001
- 2001-03-30 CN CN 01214615 patent/CN2475812Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091531A1 (en) * | 2002-04-23 | 2003-11-06 | Kingdream Public Ltd. Co. | A roller bit with a journal pin offset from the central axis thereof |
| CN1308566C (en) * | 2004-06-23 | 2007-04-04 | 江汉石油钻头股份有限公司 | Cone single roller bit |
| CN103541660A (en) * | 2013-11-07 | 2014-01-29 | 西南石油大学 | Composite type eccentric one-cone bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |