CN205117226U - Contain well carbon chromium molybdenum element rust -proof oil sleeve pipe - Google Patents
Contain well carbon chromium molybdenum element rust -proof oil sleeve pipe Download PDFInfo
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- CN205117226U CN205117226U CN201520727444.5U CN201520727444U CN205117226U CN 205117226 U CN205117226 U CN 205117226U CN 201520727444 U CN201520727444 U CN 201520727444U CN 205117226 U CN205117226 U CN 205117226U
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- thread
- molybdenum element
- external screw
- sleeve pipe
- screw thread
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Abstract
The utility model provides a contain well carbon chromium molybdenum element rust -proof oil sleeve pipe, including oil jacket pipe body (1) and coupling (3), be equipped with on oil jacket pipe body (1) the tip external screw thread (2), be equipped with internal thread (4) on coupling (3), novel tapered tread trapezoidal is partially adopted in external screw thread (2) and internal thread (4), and its pitch P sets for and is 2 tooth in, and the top of thread is on a parallel with the tubular product generating line. The utility model discloses, interior external screw thread all adopts the screw of 2 tooth in pitchs, detains speed greatly increased than 8 conventional tooth in pitch screws of API on, so improve the efficiency of breaking out on it, adopt simultaneously to contain well carbon chromium molybdenum element steel pipe material, solve anticorrosive problem from the raw and other materials in the aspect of, simultaneously antiseptic effect has been strengthened at product internal and external surface spraying anticorrosion coating.
Description
Technical field
The utility model belongs to oil exploitation drilling equipment technical field, relates to oil casing threaded link technique and the aseptic technic of drilling equipment, and particularly one is containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe.
Background technology
The oil bushing threaded connector of API standard is the most frequently used oil sleeve joint of China, and the leading products of each tubing and casing factory of Ye Shi China, this product technology is ripe, is easy to processing., structurally still there are some intrinsic defects in this tubing and casing, and it is low etc. as above to detain efficiency, limits the use of API tubing and casing.
According to statistics in world's oil gas field about 1/3 containing hydrogen sulfide gas.The many oil fields of China are as all contained hydrogen sulfide in the oil-gas Layer in the oil fields such as Sichuan, long celebrating, North China, Xinjiang, Jiang-Han Area, grand celebration, and wherein especially for Sichuan oilfield, it corrodes one of the most serious oil gas field in the world.Also many hydrogen sulfide containing oil gas fields are had abroad, as the Barrow house oil field of the U.S., Canadian truncation that oil field, gulf.Ordinary casing is when for hydrogen sulfide containing petroleum resources exploitation, sleeve pipe is under the effect of applied stress and hydrogen sulfide gas, often stressed far below brittle failure (this phenomenon is called H 2 S stress corrosion) occurs suddenly during itself yield strength, the lighter causes casing string or whole mouth well to scrap, severe one can cause blowout, make hydrogen sulfide together excessive with oil gas, cause the considerable damage of whole bench drill machine and surrounding ecological environment.Therefore, exploit hydrogen sulfide containing petroleum resources and just must use hydrogen sulfide corrosion resistant oil pipes.
Summary of the invention
The purpose of this utility model is to provide a kind of containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, and improve helicitic texture and material, shackle efficiency and corrosion resistance in raising, make the oil gas hole condition of its inclement condition that more conforms.
In order to solve the problems of the technologies described above, the utility model provides a kind of containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, and comprise tubing and casing body 1 and box cupling 3, tubing and casing body 1 end is provided with external screw thread 2; Box cupling 3 is provided with internal thread 4, and described external screw thread 2 and internal thread 4 adopt novel partially trapezoidal tapered tread, and its pitch P is set as 2 teeth/in, and thread crest is parallel to tubing bus.
Wherein, described tubing and casing body 1 and box cupling 3 material adopt in carbon chrome molybdenum system steel.
Wherein, surface, described tubing and casing body 1 inside and outside, box cupling 3 surfaces externally and internally, internal thread 4, external screw thread 2 and junction thereof are all coated with corrosion-inhibiting coating.
The utility model, compared with prior art, internal and external threads all adopts the screw thread of 2 teeth/in pitch, comparatively the conventional 8 teeth/in pitch screw of API, and make-up speed increases greatly, so improve shackle efficiency on it; Adopt containing middle carbon chrome molybdenum element steel pipe material simultaneously, solve Anticorrosion from raw material aspect; Enhance antiseptic effect in product surfaces externally and internally anticorrosion with painting coating simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model tubing and casing body male end;
Fig. 3 is the structural representation of the utility model tubing and casing body female end;
Fig. 4 is the enlarged diagram of the utility model helicitic texture;
In figure, 1-tubing and casing body, 2-external screw thread, 3-box cupling, 4-internal thread.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Should be noted that, " connection " described in the application and the word for expressing " connection ", as " being connected ", " being connected " etc., both having comprised a certain parts with another parts is directly connected, and also comprises a certain parts and is connected with another parts by miscellaneous part.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the utility model provides a kind of containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, and comprise tubing and casing body 1 and box cupling 3, tubing and casing body 1 end is provided with external screw thread 2; Box cupling 3 is provided with internal thread 4, and described external screw thread 2 and internal thread 4 adopt novel partially trapezoidal tapered tread, and its pitch P is set as 2 teeth/in, and thread crest is parallel to tubing bus.
Wherein, described tubing and casing body 1 and box cupling 3 material adopt in carbon chrome molybdenum system steel.
Wherein, surface, described tubing and casing body 1 inside and outside, box cupling 3 surfaces externally and internally, internal thread 4, external screw thread 2 and junction thereof are all coated with corrosion-inhibiting coating.
The utility model, compared with prior art, internal and external threads all adopts the screw thread of 2 teeth/in pitch, comparatively the conventional 8 teeth/in pitch screw of API, and because adopting coarse pitch design, make-up speed increases greatly, so improve shackle efficiency on it; Adopt containing middle carbon chrome molybdenum element steel pipe material simultaneously, solve Anticorrosion from raw material aspect; Enhance antiseptic effect in product surfaces externally and internally anticorrosion with painting coating simultaneously.
The above is only preferred embodiment of the present utility model; it should be noted that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1., containing a middle carbon chrome molybdenum element rust-proof oil sleeve pipe, it is characterized in that, comprise tubing and casing body (1) and box cupling (3), tubing and casing body (1) end is provided with external screw thread (2); Box cupling (3) is provided with internal thread (4), and described external screw thread (2) and internal thread (4) adopt novel partially trapezoidal tapered tread, and its pitch P is set as 2 teeth/in, and thread crest is parallel to tubing bus.
2. one according to claim 1 is containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, it is characterized in that, carbon chrome molybdenum system steel in the material employing of described tubing and casing body (1) and box cupling (3).
3. one according to claim 1 is containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, it is characterized in that, surface, described tubing and casing body (1) inside and outside, box cupling (3) surfaces externally and internally, internal thread (4), external screw thread (2) and junction thereof are all coated with corrosion-inhibiting coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520727444.5U CN205117226U (en) | 2015-09-18 | 2015-09-18 | Contain well carbon chromium molybdenum element rust -proof oil sleeve pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520727444.5U CN205117226U (en) | 2015-09-18 | 2015-09-18 | Contain well carbon chromium molybdenum element rust -proof oil sleeve pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205117226U true CN205117226U (en) | 2016-03-30 |
Family
ID=55572845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520727444.5U Active CN205117226U (en) | 2015-09-18 | 2015-09-18 | Contain well carbon chromium molybdenum element rust -proof oil sleeve pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205117226U (en) |
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2015
- 2015-09-18 CN CN201520727444.5U patent/CN205117226U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |