CN213980686U - All-titanium alloy drill rod in threaded connection - Google Patents
All-titanium alloy drill rod in threaded connection Download PDFInfo
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- CN213980686U CN213980686U CN202023046087.6U CN202023046087U CN213980686U CN 213980686 U CN213980686 U CN 213980686U CN 202023046087 U CN202023046087 U CN 202023046087U CN 213980686 U CN213980686 U CN 213980686U
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- Prior art keywords
- titanium alloy
- wall
- drill rod
- joint
- annular step
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 95
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 238000005488 sandblasting Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 12
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a threaded connection all-titanium alloy drill rod, which comprises a titanium alloy upper joint, a titanium alloy drill rod body and a titanium alloy lower joint which are sequentially connected from top to bottom; the outer wall of the bottom end of the upper titanium alloy joint is processed into a conical surface with the outer diameter gradually decreasing from top to bottom, the outer wall of the top end of the upper connecting part of the titanium alloy drill rod body is processed into a conical surface with the outer diameter gradually increasing from top to bottom, the outer wall of the top end of the lower titanium alloy joint is processed into a conical surface with the outer diameter gradually decreasing from top to bottom, the outer wall of the bottom end of the lower connecting part of the titanium alloy drill rod body is processed into a conical surface with the outer diameter gradually increasing from top to bottom, and an included angle formed between each; the whole threaded-connected all-titanium alloy drill rod is made of a titanium alloy material, the strength of the threaded-connected all-titanium alloy drill rod is higher than that of the titanium alloy drill rod of the existing steel joint, and the construction load of a drilling machine is effectively reduced; in addition, the drill rod can not generate galvanic corrosion in the use process, has high corrosion resistance, and is more suitable for high-corrosion wells with increasingly complex working conditions.
Description
Technical Field
The utility model relates to a technical field is made to oil and gas industry oil well pipe, in particular to threaded connection's full titanium alloy drilling rod.
Background
At present, oil drilling is developing towards deeper and more complex well conditions, severe working conditions such as deep well ultra-deep wells, large displacement horizontal wells and high corrosion are increasing, users put forward higher requirements on the performance of drill rods for safe, efficient and low-cost drilling development, and common steel drill rods are far from being met. China is a large titanium resource country, the titanium reserves are the top of the world, and the titanium alloy has the advantages of high strength, small density, good toughness, strong corrosion resistance and the like, so the material can be completely used for producing and manufacturing the titanium alloy drill rod.
The joints of the titanium alloy drill rods on the market at present are made of common steel. The steel joint increases the whole weight of the drill rod, and meanwhile galvanic corrosion is easy to form between the steel joint and the titanium alloy pipe of the body, so that the fatigue life of the whole drill rod is reduced; the corrosion resistance of the steel drill rod joint is far worse than that of the titanium alloy joint, so that the corrosion resistance of the whole drill rod is poor, the corrosion resistance fatigue life of the whole drill rod is shortened, and the like, and the titanium alloy drill rod cannot thoroughly solve the requirements of reducing the load of a drilling machine and improving the corrosion resistance of the drill rod in ultra-deep well drilling.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an adapt to deep well ultra-deep well, big displacement horizontal well and high corrosion and other abominable operating mode's threaded connection's full titanium alloy drilling rod.
Therefore, the utility model discloses technical scheme as follows:
a threadedly connected all titanium alloy drill rod comprising:
the upper titanium alloy joint is provided with a connecting internal thread on the inner wall of the upper part, a first annular step is formed on the inner wall of the bottom end in a concave manner, and a connecting internal thread is arranged on the inner wall below the first annular step;
the titanium alloy drill rod body is formed by integrally forming an upper connecting part, a middle pipe body and a lower connecting part which are sequentially connected; the outer wall of the upper part of the upper connecting part is sunken and is provided with a second annular step, and the outer wall above the second annular step is provided with a connecting external thread matched with the connecting internal thread on the inner wall of the lower part of the titanium alloy upper joint, so that the upper part of the upper connecting part is fixedly connected with the lower part of the titanium alloy upper joint through the thread; the outer wall of the lower part of the lower connecting part is sunken and is provided with a third annular step, and a connecting external thread is arranged on the outer wall below the third annular step;
the lower part outer wall of the titanium alloy lower joint is provided with a connecting external thread, the upper part inner wall is sunken to form a fourth annular step, and the inner wall above the fourth annular step is provided with a connecting internal thread matched with the connecting external thread on the lower part outer wall of the lower connecting part, so that the upper part of the titanium alloy lower joint is in threaded connection and fixation with the lower part of the lower connecting part;
the outer walls of the bottom ends of the upper titanium alloy joint and the lower connecting part are all machined into conical surfaces with the outer diameters gradually reduced from top to bottom, the outer walls of the top ends of the upper connecting part and the lower titanium alloy joint are all machined into conical surfaces with the outer diameters gradually reduced from top to bottom, and included angles formed between the conical surfaces and the central axis of the titanium alloy drill rod body are 15-21 degrees.
Furthermore, the connecting internal thread arranged at the upper part of the titanium alloy upper joint and the connecting external thread arranged at the lower part of the titanium alloy lower joint are both TT-shaped threads.
Furthermore, a sand blasting layer is coated on a connecting internal thread arranged on the upper part of the titanium alloy upper joint and a connecting external thread arranged on the lower part of the titanium alloy lower joint.
Further, thickening layers are upset on the outer wall of the upper connecting part below the second annular step and the outer wall of the lower connecting part above the third annular step, so that the strength of the pipe body at the threaded connection part is increased.
Furthermore, the titanium alloy upper joint adopts a titanium alloy joint with the yield strength of 827-1175 MPa.
Further, the titanium alloy drill rod body is a titanium alloy pipe body with yield strength of 724-1138 MPa.
Furthermore, the titanium alloy lower joint adopts a titanium alloy joint with the yield strength of 827-1175 MPa.
Compared with the prior art, the whole threaded connection all-titanium alloy drill rod is made of a titanium alloy material, has higher strength than the titanium alloy drill rod of the existing steel joint, and effectively reduces the construction load of a drilling machine; in addition, the drill rod can not generate galvanic corrosion in the use process, has high corrosion resistance, and is more suitable for high-corrosion wells with increasingly complex working conditions.
Drawings
Fig. 1 is a schematic structural view of the threaded connection all-titanium alloy drill rod of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a partially enlarged view of a portion B in fig. 1.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
As shown in fig. 1, the all-titanium alloy drill rod in threaded connection comprises a titanium alloy upper joint 1, a titanium alloy drill rod body 2 and a titanium alloy lower joint 3 which are sequentially connected from top to bottom; wherein the content of the first and second substances,
the inner wall of the upper part of the titanium alloy upper joint 1 is provided with a connecting internal thread, the inner wall of the lower part is sunken and is provided with a first annular step 1a, and the inner wall below the first annular step 1a is provided with a connecting internal thread; specifically, the titanium alloy upper joint 1 is a titanium alloy joint with the yield strength of 827-1175 MPa;
the titanium alloy drill rod body 2 is formed by integrally forming an upper connecting part 2a, an intermediate pipe body and a lower connecting part 2b which are sequentially connected; the outer wall of the upper part of the upper connecting part 2a is sunken and is provided with a second annular step, and a connecting external thread matched with the connecting internal thread on the inner wall of the lower part of the titanium alloy upper joint 1 is arranged on the outer wall above the second annular step, so that the upper part of the upper connecting part 2a is fixedly connected with the lower part of the titanium alloy upper joint 1 through the thread; the outer wall of the lower part of the lower connecting part 2b is sunken and is provided with a third annular step, and a connecting external thread is arranged on the outer wall below the third annular step; specifically, the titanium alloy drill rod body 2 is a titanium alloy pipe body with yield strength of 724-1138 MPa;
the lower part outer wall of the titanium alloy lower joint 3 is provided with a connecting external thread, the upper part inner wall is sunken to form a fourth annular step 3a, and the inner wall above the fourth annular step 3a is provided with a connecting internal thread matched with the connecting external thread on the lower part outer wall of the lower connecting part 2b, so that the upper part of the titanium alloy lower joint 3 is in threaded connection and fixation with the lower part of the lower connecting part 2 b; specifically, the titanium alloy lower joint 3 is a titanium alloy joint with the yield strength of 827-1175 MPa;
the outer walls of the bottom ends of the upper titanium alloy joint 1 and the lower connecting part 2b are processed into conical surfaces with the outer diameters gradually decreasing from top to bottom, the outer walls of the top ends of the upper connecting part 2a and the lower titanium alloy joint 3 are processed into conical surfaces with the outer diameters gradually decreasing from top to bottom, and an included angle formed between each conical surface and the central axis of the titanium alloy drill rod body 2 is 15 degrees; and upset and forge the thickening layer with 2.5 times pipe body thickness on the upper junction 2a outer wall that is located below the second annular step and on the lower junction 2b outer wall above the third annular step to increase the intensity of threaded connection department, make the pipe body meet the greater well condition requirement of deep well pressure-bearing.
As a preferred real-time solution of the present application, the internal connection thread provided on the upper portion of the titanium alloy upper joint 1 and the external connection thread provided on the lower portion of the titanium alloy lower joint 3 are both TT-type threads, and the internal connection thread provided on the upper portion of the titanium alloy upper joint 1 and the external connection thread provided on the lower portion of the titanium alloy lower joint 3 are covered with a sand blasting layer.
It is only above that the utility model discloses the most representative embodiment, all the foundation the utility model discloses impartial change and the modification of doing in the application for patent scope all should belong to the utility model discloses a coverage.
Claims (7)
1. A threaded connection's all titanium alloy drilling rod which characterized in that includes:
the titanium alloy upper joint (1) is provided with a connecting internal thread on the inner wall of the upper part, a first annular step (1a) is formed on the concave inner wall of the lower part, and a connecting internal thread is arranged on the inner wall below the first annular step (1 a);
the titanium alloy drill rod body (2) is formed by integrally forming an upper connecting part (2a), a middle pipe body and a lower connecting part (2b) which are sequentially connected; the outer wall of the upper part of the upper connecting part (2a) is sunken and is provided with a second annular step, and a connecting external thread matched with the connecting internal thread on the inner wall of the lower part of the titanium alloy upper joint (1) is arranged on the outer wall above the second annular step, so that the upper part of the upper connecting part (2a) is fixedly connected with the lower part of the titanium alloy upper joint (1) through the thread; the outer wall of the lower part of the lower connecting part (2b) is sunken and is provided with a third annular step, and a connecting external thread is arranged on the outer wall below the third annular step;
the lower part outer wall of the titanium alloy lower joint (3) is provided with a connecting external thread, the upper part inner wall is sunken to form a fourth annular step (3a), and the inner wall above the fourth annular step (3a) is provided with a connecting internal thread matched with the connecting external thread on the lower part outer wall of the lower connecting part (2b), so that the upper part of the titanium alloy lower joint (3) is in threaded connection and fixation with the lower part of the lower connecting part (2 b);
the outer walls of the bottom ends of the upper titanium alloy connector (1) and the lower connecting part (2b) are all machined into conical surfaces with the outer diameters gradually reduced from top to bottom, the outer walls of the top ends of the upper connecting part (2a) and the lower titanium alloy connector (3) are all machined into conical surfaces with the outer diameters gradually reduced from top to bottom, and included angles formed between the conical surfaces and the central axis of the titanium alloy drill rod body (2) are 15-21 degrees.
2. The all-titanium alloy drill rod in threaded connection according to claim 1, characterized in that the internal connection thread arranged at the upper part of the titanium alloy upper joint (1) and the external connection thread arranged at the lower part of the titanium alloy lower joint (3) are both TT-shaped threads.
3. The all-titanium alloy drill rod in threaded connection according to claim 1 or 2, characterized in that a sand blasting layer is coated on the connecting internal thread arranged at the upper part of the titanium alloy upper joint (1) and the connecting external thread arranged at the lower part of the titanium alloy lower joint (3).
4. A threadedly connected all titanium alloy drill rod according to claim 1, wherein a thickening layer is upset on the outer wall of the upper connection portion (2a) below the second annular step and on the outer wall of the lower connection portion (2b) above the third annular step.
5. The threaded connection all-titanium alloy drill rod as claimed in claim 1, wherein the titanium alloy upper joint (1) is a titanium alloy joint with a yield strength of 827-1175 MPa.
6. The threaded connection all-titanium alloy drill rod as claimed in claim 1, wherein the titanium alloy drill rod body (2) is a titanium alloy tube body with yield strength of 724-1138 MPa.
7. The threaded connection all-titanium alloy drill rod as claimed in claim 1, wherein the titanium alloy lower joint (3) is a titanium alloy joint with a yield strength of 827-1175 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023046087.6U CN213980686U (en) | 2020-12-16 | 2020-12-16 | All-titanium alloy drill rod in threaded connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023046087.6U CN213980686U (en) | 2020-12-16 | 2020-12-16 | All-titanium alloy drill rod in threaded connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213980686U true CN213980686U (en) | 2021-08-17 |
Family
ID=77244167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023046087.6U Expired - Fee Related CN213980686U (en) | 2020-12-16 | 2020-12-16 | All-titanium alloy drill rod in threaded connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213980686U (en) |
-
2020
- 2020-12-16 CN CN202023046087.6U patent/CN213980686U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210817 |