CN212054512U - High build-up rate PDC drill bit for flexible drilling tool - Google Patents
High build-up rate PDC drill bit for flexible drilling tool Download PDFInfo
- Publication number
- CN212054512U CN212054512U CN202020570469.XU CN202020570469U CN212054512U CN 212054512 U CN212054512 U CN 212054512U CN 202020570469 U CN202020570469 U CN 202020570469U CN 212054512 U CN212054512 U CN 212054512U
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- Prior art keywords
- drill bit
- drilling tool
- joint
- flexible
- barrel
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- Expired - Fee Related
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 230000006978 adaptation Effects 0.000 claims abstract description 3
- 230000003746 surface roughness Effects 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000003345 natural gas Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a flexible drilling tool is with high build rate PDC drill bit belongs to oil or natural gas exploitation technical field. The flexible drill bit comprises a drill bit body, wherein the drill bit body comprises a hemispherical crown part, a circular tray and a thread section which are sequentially arranged from top to bottom, the thread section is in thread fit connection with a flexible drill joint, and the flexible drill joint comprises an upper joint cylinder and a lower joint cylinder; the external diameter of top connection barrel is less than the external diameter of lower clutch barrel, rights the cover and establishes on the top connection barrel rather than the adaptation, but just rights the cover and around top connection barrel circumferential direction. The utility model discloses a set up the rotatable cover of rightting between circular tray and lower joint barrel, reduced and crept into the resistance, prolonged the life of drill bit, reduced the sticking drill risk, the short and small compactness of structure, the preparation is convenient, and the drill bit turns in a flexible way, and the short distance of being convenient for is oblique, and the slope rate is up to 30 degrees/m.
Description
Technical Field
The utility model relates to an oil or natural gas exploitation technical field, especially a high build rate PDC drill bit that uses with flexible drilling tool cooperation.
Background
In the process of oil exploitation, an ultra-short radius sidetrack drilling technology for simultaneously exploiting a plurality of strata in the same well is one of main yield increasing means of oil exploitation; the ultra-short radius sidetrack drilling technology is carried out in old well bores such as a vertical well/a directional well, a plurality of oil and gas channels can be provided for an oil well, the oil drainage area is increased, and the oil and gas recovery rate is effectively improved.
At present, the requirement on a flexible drilling tool is high when the flexible drilling tool is used for ultra-short radius sidetrack drilling construction, particularly a drill bit is required to be capable of rapidly turning along a certain direction to be consistent with the trend direction of a reservoir stratum in the deflecting process; for a common PDC drill bit, a cylindrical structure is arranged below a hemispherical crown part of the PDC drill bit, when the PDC drill bit is turned in a deflecting well hole, sliding friction between the outer surface of the cylinder and the wall of a guide pipe is inevitably caused, abrasion is intensified, drilling resistance moment is increased, the drill bit is accelerated to be damaged, and after the drilling direction is changed, the lateral reaction force of the drill bit on the wall of the well in a deviated well or even a horizontal well is increased, and serious drilling risks are caused.
Disclosure of Invention
The utility model aims at overcoming prior art's shortcoming, provide a flexible drilling tool is with high build rate PDC drill bit, it has reduced the resistance that creeps into through setting up rotatable cover of rightting between circular tray and lower joint barrel, has prolonged the life of drill bit, has reduced the card and has bored the risk.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a high build-up rate PDC drill bit for a flexible drilling tool comprises a drill bit body, wherein the drill bit body comprises a hemispherical crown part, a circular tray and a thread section which are sequentially arranged from top to bottom, the thread section is in thread fit connection with a flexible drilling tool joint, and the flexible drilling tool joint comprises an upper joint cylinder and a lower joint cylinder;
the external diameter of top connection barrel is less than the external diameter of lower clutch barrel, rights the cover and establishes on the top connection barrel rather than the adaptation, but just rights the cover and around top connection barrel circumferential direction.
As an improvement of the utility model, the righting sleeve is a conical cylinder body, and the outer diameter of the righting sleeve is gradually reduced from top to bottom.
As an improvement of the utility model, the top external diameter of righting the cover is the same and mutual hugging joint with circular tray external diameter, and the bottom external diameter of righting the cover is the same and mutual hugging joint with lower clutch barrel external diameter.
As an improvement of the utility model, the taper a of the centralizing sleeve is 4 degrees.
As an improvement of the utility model, the surface roughness Ra of the inner surface of the centralizing sleeve is less than 0.4 μm.
The utility model has the advantages that: the utility model provides a high build slope PDC drill bit for flexible drilling tool, the screw thread section that sets up on the connector body carries out screw thread fit with flexible drilling tool joint upper joint barrel and is connected, the cover of righting is established on the upper joint barrel rotatably, but 360 free rotations of joint barrel above the cover of righting is the axle center promptly, it advances to replace traditional slip to advance by rotatory advancing, the resistance of creeping into has been reduced, the side reaction force of the wall of a well has been reduced, play the effect of drill bit centralizer again simultaneously, the life of drill bit has been prolonged, the sticking risk has been reduced, and cooperate flexible drilling tool to use, the build slope of flexible drilling tool has been improved widely.
As an improvement of the utility model, the righting sleeve is a conical cylinder body, and the outer diameter of the righting sleeve is gradually reduced from top to bottom. The centralizing sleeve is arranged into a conical cylinder structure, so that the build-up rate of the flexible drilling tool is further improved, and the return of rock debris is facilitated.
As an improvement of the utility model, the top external diameter of righting the cover is the same and mutual hugging joint with circular tray external diameter, and the bottom external diameter of righting the cover is the same and mutual hugging joint with lower clutch barrel external diameter. The overall structure is in smooth transition, novel design and compact structure.
As an improvement of the utility model, the taper a of the centralizing sleeve is 4 degrees. The tapering is too little to be unfavorable for returning of detritus and goes out, and the tapering is too big, is unfavorable for the holistic stability of structure, and the tapering a of righting the cover is 4, when guaranteeing overall structure stability, and makes the detritus return out smoothly.
As an improvement of the utility model, the surface roughness Ra of the inner surface of the righting sleeve is less than 0.4 μm, so that the righting sleeve can conveniently realize 360-degree free rotation.
To sum up, the utility model discloses the short and small compactness of structure, the preparation is convenient, and the drill bit turns in a flexible way, and the short distance of being convenient for is deflecting, and the slope rate is up to 30/m, can accomplish windowing, deflecting in thin oil reservoir layer to along the oil reservoir trend drilling 100 + 200m horizontal segments, it has higher flexible drilling tool slope rate and ultrashort curvature radius.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a bit body according to the present invention;
fig. 3 is a schematic structural view of the centralizing sleeve of the present invention.
In the figure, 1, a drill bit body; 11. a circular tray; 12. a threaded segment; 121. a liquid channel; 13. water holes; 14. a blade; 2. a centralizing sleeve; 21. an upper annulus; 22. a lower annulus; 3. a flexible drill joint; 31. and (4) an internal threaded hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
It should be noted that the terms of orientation such as up, down, inside and outside in the embodiments of the present invention are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting.
As shown in fig. 1, 2 and 3, a PDC drill bit with a high build-up rate for a flexible drilling tool comprises a bit body 1 and a centering sleeve 2, wherein the bit body 1 is an existing component, the bit body 1 comprises a hemispherical crown, a circular tray 11 and a threaded section 12 which are sequentially arranged from top to bottom, the threaded section 12 is an external thread NC31 buckle type, which can ensure tensile strength and torsional strength and simultaneously form a large liquid channel 121 communicated with a water hole 13, and the threaded section 12 is in threaded fit connection with internal threads in a flexible drilling tool joint 3 and is used for connecting the bit body 1 with the flexible drilling tool joint 3; the flexible drilling tool joint 3 comprises an upper joint cylinder and a lower joint cylinder, the upper joint cylinder and the lower joint cylinder can adopt an integrated structure or a split structure welded together, the embodiment adopts an integrated casting structure, and the utility model has no limitation on the structural form; the hemispherical crown part is provided with 4 groups of blades 14 and 4 round water holes 13 which are arranged in a cross shape and are mutually crossed.
The outer diameter of the upper joint barrel is smaller than that of the lower joint barrel, the centering sleeve 2 is sleeved on the upper joint barrel matched with the upper joint barrel, and the centering sleeve 2 can rotate circumferentially around the upper joint barrel.
Preferably, the centering sleeve 2 is a tapered cylinder, the outer diameter of the centering sleeve is gradually reduced from top to bottom, the taper a of the centering sleeve 2 is 3-5 degrees, preferably 4 degrees, the outer diameter of the top end of the centering sleeve 2 (such as the outer diameter of the upper ring surface 21 in fig. 3) is the same as the outer diameter of the circular tray 11 and is in mutual abutting joint, the diameter of the centering sleeve is consistent with the outer diameter of the wing 14, the centering sleeve 2 can be effectively protected, the outer diameter of the bottom end of the centering sleeve 2 (such as the outer diameter of the lower ring surface 22 in fig. 3) is the same as the outer diameter of the lower joint cylinder and is in mutual abutting joint, the length of the internal threaded hole 31 in the flexible drill joint 3 is larger than the length of the threaded section 12 matched with the internal threaded hole, so that the centering sleeve 2 is conveniently limited between the circular tray 11 and the lower joint cylinder of.
The material of the straightening sleeve 2 is preferably 42CrMo, the inner and outer surfaces thereof are smooth, and the surface roughness Ra is preferably less than 0.4 μm.
The utility model discloses an installation method does: firstly, the centering sleeve 2 is sleeved on an upper joint cylinder of the flexible drill joint 3, then the drill bit body 1 is screwed with the flexible drill joint 3, so that an upper ring surface 21 of the centering sleeve 2 is contacted with the lower surface of the circular tray 11, a lower ring surface 22 of the centering sleeve 2 is contacted with the upper surface of a lower joint cylinder of the flexible drill joint 3, namely, the centering sleeve 2 is fixed between the circular tray 11 and the lower joint cylinder, and finally, a subsequent flexible drill and a common drill rod are sequentially connected and combined for use.
The above is a detailed introduction of the PDC drill bit with high build rate for flexible drilling tools provided by the present invention, and specific examples are applied herein to explain the structural principle and the implementation of the present invention, and the above examples are only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (5)
1. The utility model provides a flexible drilling tool is with high build slope PDC drill bit, it includes drill bit body (1), drill bit body (1) by hemispherical crown, circular tray (11) and screw thread section (12) that top-down set gradually, its characterized in that: the thread section (12) is in thread fit connection with the flexible drilling tool joint (3), and the flexible drilling tool joint (3) comprises an upper joint cylinder and a lower joint cylinder;
the external diameter of top connection barrel is less than the external diameter of lower clutch barrel, but set up on rather than the top connection barrel of adaptation right cover (2), but just right cover (2) around top connection barrel circumferential direction.
2. The PDC drill bit with high build rate for the flexible drilling tool according to claim 1, wherein: the centralizing sleeve (2) is a conical cylinder body, and the outer diameter of the centralizing sleeve is gradually reduced from top to bottom.
3. The PDC bit with a high build rate for a flexible drilling tool according to claim 2, wherein: the outer diameter of the top end of the centering sleeve (2) is the same as that of the circular tray (11) and is in mutual abutting joint, and the outer diameter of the bottom end of the centering sleeve (2) is the same as that of the lower connector cylinder and is in mutual abutting joint.
4. The PDC bit with a high build rate for a flexible drilling tool according to claim 2, wherein: the taper a of the centralizing sleeve (2) is 4 degrees.
5. The PDC drill bit with high build rate for the flexible drilling tool according to any one of claims 1 to 4, wherein: the surface roughness Ra of the inner surface of the centralizing sleeve (2) is less than 0.4 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020570469.XU CN212054512U (en) | 2020-04-17 | 2020-04-17 | High build-up rate PDC drill bit for flexible drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020570469.XU CN212054512U (en) | 2020-04-17 | 2020-04-17 | High build-up rate PDC drill bit for flexible drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212054512U true CN212054512U (en) | 2020-12-01 |
Family
ID=73524589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020570469.XU Expired - Fee Related CN212054512U (en) | 2020-04-17 | 2020-04-17 | High build-up rate PDC drill bit for flexible drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212054512U (en) |
-
2020
- 2020-04-17 CN CN202020570469.XU patent/CN212054512U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230328 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC NORTHWEST OIL FIELD Co. Address before: 457000 No. 15, Zhongyuan East Road, Puyang City, Henan Province Patentee before: Henan Dongfang Hengye Petroleum Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |