CN111894476A - Steel joint titanium alloy pipe body threaded connection type light drill rod - Google Patents
Steel joint titanium alloy pipe body threaded connection type light drill rod Download PDFInfo
- Publication number
- CN111894476A CN111894476A CN202010621688.0A CN202010621688A CN111894476A CN 111894476 A CN111894476 A CN 111894476A CN 202010621688 A CN202010621688 A CN 202010621688A CN 111894476 A CN111894476 A CN 111894476A
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- CN
- China
- Prior art keywords
- joint
- shoulder
- pipe body
- titanium alloy
- threaded connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims abstract description 16
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000011324 bead Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 244000166071 Shorea robusta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a steel joint titanium alloy pipe body threaded connection type light drill rod, wherein two ends of a joint A are both internal threads, a sealing shoulder A is arranged in one end of the joint A, and a transition shoulder A and an interference assembly shoulder A are arranged at the end part of the joint A; one end of the joint B is an external thread, the other end of the joint B is an internal thread, a sealing shoulder B is arranged in one end of the joint B, and a transition shoulder B and an interference assembly shoulder B are arranged at the end part of the joint B; sealing shoulder surfaces are arranged on the end surfaces of the two ends of the pipe body, and fine tooth type external threads and interference fit shoulders are arranged at the two ends of the pipe body; has the advantages that: the invention improves the drilling depth, lightens the hook load, saves fuel, lightens the fatigue strength and improves the drilling speed; the stress corrosion fatigue resistance of the drill rod is improved by more than 10 times, the damage tolerance of the drill column is increased, and the service life of the drill column is prolonged; high mechanical strength, good flexibility, excellent corrosion resistance, low specific gravity and wide application range.
Description
Technical Field
The invention relates to the field of drill rods, in particular to a steel joint titanium alloy pipe body threaded connection type light drill rod.
Background
With the exploitation of oil and gas resources, shallow oil and gas resources are increasingly reduced, people have to go to deeper strata, oceans and shales to search for the oil and gas resources, the working conditions are increasingly complex, the requirements on a drill rod are higher, and the drill rod is required to resist heat cracking, hydrogen embrittlement, corrosion and the like. Therefore, a new material which is lighter and has higher strength-weight ratio is urgently needed to realize ultra-deep drilling and large-horizontal-displacement drilling which cannot be realized by a steel drill rod.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a steel joint titanium alloy pipe body threaded connection type light drill rod.
The new technical scheme of the invention is as follows: a steel joint titanium alloy pipe body threaded connection type light drill rod comprises a joint A, a joint B and a pipe body, wherein both ends of the joint A are internal threads, the internal thread at one end of the joint A is a standard drilling tool internal thread, the internal thread at the other end of the joint A is a fine-tooth internal thread, a sealing shoulder A is arranged in the other end of the joint A, a transition shoulder A is arranged at the end part of the joint A, and an interference assembly shoulder A is arranged at the conical surface of the transition shoulder A; one end of the joint B is an external thread, the external thread is a standard drilling tool external thread, the other end of the joint B is an internal thread, the internal thread is a fine-tooth internal thread, a sealing shoulder B is arranged in the other end of the joint B, a transition shoulder B is arranged at the end part of the joint B, and an interference assembly shoulder B is arranged at the conical surface of the transition shoulder B; the end surfaces of the two ends of the pipe body are provided with sealing circular bead surfaces, and the sealing circular bead surfaces of the two ends are matched with the sealing circular bead A and the sealing circular bead B; the two ends of the pipe body are provided with fine-tooth external threads which are matched with the fine-tooth internal threads of the joint A and the fine-tooth internal threads of the joint B; the interference fit shoulder is arranged at the two ends of the pipe body, and the interference fit shoulder is in interference fit with the interference fit shoulder A of the connector A and the interference fit shoulder B of the connector B.
The joint A and the joint B are steel joints.
The pipe body is made of titanium alloy.
The included angle between the interference assembly shoulder A and the central axis of the joint A is 18 degrees.
The fine thread type external thread and the fine thread type internal thread are flat trapezoids.
The taper of the fine-tooth external thread is 1: 12-1: 36.
the taper of the fine-tooth internal thread is 1: 12-1: 36.
the invention has the beneficial effects that: the invention improves the drilling depth, lightens the hook load, saves fuel, lightens the fatigue strength and improves the drilling speed; the stress corrosion fatigue resistance of the drill rod is improved by more than 10 times, the damage tolerance of the drill column is increased, and the service life of the drill column is prolonged; high mechanical strength, good flexibility, excellent corrosion resistance, low specific gravity and wide application range.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a structural schematic diagram of a flat trapezoidal fine thread.
Wherein: 1. a joint A; 2. sealing the shoulder surface; 3. sealing the shoulder A; 4. an interference fit shoulder; 5. a transition shoulder A; 6. assembling a shoulder A in an interference manner; 7. a pipe body; 8. interference assembling a shoulder B; 9. a transition shoulder B; 10. sealing the shoulder B; 11. and a joint B.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A steel joint titanium alloy pipe body threaded connection type light drill rod comprises a joint A1, a joint B11 and a pipe body 7, wherein both ends of the joint A1 are internal threads, the internal thread at one end of the joint A1 is a standard drilling tool internal thread, the internal thread at the other end of the joint A1 is a fine-tooth internal thread, a sealing shoulder A3 is arranged at the other end of the joint A1, a transition shoulder A5 is arranged at the end of the joint A1, and an interference assembly shoulder A6 is arranged at the conical surface of the transition shoulder A5; one end of the joint B11 is provided with an external thread which is an external thread of a standard drilling tool, the other end of the joint B11 is provided with an internal thread which is a fine-tooth internal thread, the other end of the joint B11 is internally provided with a sealing shoulder B10, the end part of the joint B11 is provided with a transition shoulder B9, and the conical surface of the transition shoulder B9 is provided with an interference assembly shoulder B8; the end surfaces of the two ends of the tube body 7 are provided with sealing shoulder surfaces 2, and the sealing shoulder surfaces 2 at the two ends are matched with a sealing shoulder A3 and a sealing shoulder B10; two ends of the pipe body 7 are provided with fine-tooth external threads which are matched with the fine-tooth internal threads of the connector A1 and the fine-tooth internal threads of the connector B11; interference fit shoulders 4 are arranged at two ends of the pipe body 7, and the interference fit shoulders 4 are in interference fit with an interference fit shoulder A6 of the connector A1 and an interference fit shoulder B8 of the connector B11.
The joint A1 and the joint B11 are steel joints.
The pipe body 7 is made of titanium alloy.
The included angle between the interference assembly shoulder A6 and the central axis of the joint A1 is 18 degrees.
The fine thread type external thread and the fine thread type internal thread are flat trapezoids.
The taper of the fine-tooth external thread is 1: 12-1: 36.
the taper of the fine-tooth internal thread is 1: 12-1: 36.
the connector A1 and the connector B11 and the pipe body 7 adopt a thermal assembly process, the connectors are heated to a certain temperature during assembly, certain expansion is achieved, the connectors are cooled and shrunk after being connected with the pipe body 7, and therefore the interference assembly shoulder A6 of the connector A1 and the interference assembly shoulder B8 of the connector B11 are in interference fit with the interference fit shoulder 4 of the pipe body 7 respectively, thread tripping is effectively prevented, and a sealing effect is achieved.
A steel joint titanium alloy pipe body threaded connection type light drill rod is characterized in that a standard drilling tool internal thread of a joint A1 is in threaded connection with a standard drilling tool external thread of a joint B11 to form a drill rod string; this drill string is connected to other drilling tools, from the bottom hole drill bit up to the derrick drill pipe, forming the entire drill string. Wherein the tubular body 7 occupies more than 80% of the length of the entire drill string.
Claims (7)
1. The utility model provides a light-duty drilling rod of steel joint titanium alloy body threaded connection formula, includes joint A (1), joint B (11) and body (7), its characterized in that: the two ends of the joint A (1) are both provided with internal threads, the internal thread at one end of the joint A (1) is a standard drilling tool internal thread, the internal thread at the other end of the joint A (1) is a fine-tooth internal thread, a sealing shoulder A (3) is arranged in the other end of the joint A (1), a transition shoulder A (5) is arranged at the end part of the joint A (1), and an interference assembly shoulder A (6) is arranged at the conical surface of the transition shoulder A (5); one end of the joint B (11) is an external thread, the external thread is a standard drilling tool external thread, the other end of the joint B (11) is an internal thread, the internal thread is a fine-tooth internal thread, a sealing shoulder B (10) is arranged in the other end of the joint B (11), a transition shoulder B (9) is arranged at the end part of the joint B (11), and an interference assembly shoulder B (8) is arranged at the conical surface of the transition shoulder B (9); the end faces of the two ends of the pipe body (7) are provided with sealing shoulder surfaces (2), and the sealing shoulder surfaces (2) at the two ends are matched with the sealing shoulder A (3) and the sealing shoulder B (10); two ends of the pipe body (7) are provided with fine-tooth external threads which are matched with the fine-tooth internal threads of the joint A (1) and the joint B (11); the interference fit type pipe joint is characterized in that interference fit shoulders (4) are arranged at two ends of the pipe body (7), and the interference fit shoulders (4) are in interference fit with an interference fit shoulder A (6) of the joint A (1) and an interference fit shoulder B (8) of the joint B (11).
2. The steel joint titanium alloy pipe body threaded connection type light drill rod as claimed in claim 1, wherein: the joint A (1) and the joint B (11) are steel joints.
3. The steel joint titanium alloy pipe body threaded connection type light drill rod as claimed in claim 1, wherein: the pipe body (7) is made of titanium alloy.
4. The steel joint titanium alloy pipe body threaded connection type light drill rod as claimed in claim 1, wherein: the included angle between the interference assembly shoulder A (6) and the central axis of the joint A (1) is 18 degrees.
5. The steel joint titanium alloy pipe body threaded connection type light drill rod as claimed in claim 1, wherein: the fine thread type external thread and the fine thread type internal thread are flat trapezoids.
6. The steel joint titanium alloy pipe body threaded connection type light drill rod as claimed in claim 1 or 5, wherein: the taper of the fine-tooth external thread is 1: 12-1: 36.
7. the steel joint titanium alloy pipe body threaded connection type light drill rod as claimed in claim 1 or 5, wherein: the taper of the fine-tooth internal thread is 1: 12-1: 36.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010621688.0A CN111894476A (en) | 2020-07-01 | 2020-07-01 | Steel joint titanium alloy pipe body threaded connection type light drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010621688.0A CN111894476A (en) | 2020-07-01 | 2020-07-01 | Steel joint titanium alloy pipe body threaded connection type light drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111894476A true CN111894476A (en) | 2020-11-06 |
Family
ID=73191886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010621688.0A Pending CN111894476A (en) | 2020-07-01 | 2020-07-01 | Steel joint titanium alloy pipe body threaded connection type light drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111894476A (en) |
-
2020
- 2020-07-01 CN CN202010621688.0A patent/CN111894476A/en active Pending
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