CN105114005A - Anti-corrosion oil casing containing carbon, chromium and molybdenum elements - Google Patents
Anti-corrosion oil casing containing carbon, chromium and molybdenum elements Download PDFInfo
- Publication number
- CN105114005A CN105114005A CN201510599259.7A CN201510599259A CN105114005A CN 105114005 A CN105114005 A CN 105114005A CN 201510599259 A CN201510599259 A CN 201510599259A CN 105114005 A CN105114005 A CN 105114005A
- Authority
- CN
- China
- Prior art keywords
- thread
- oil casing
- corrosion
- tubing
- casing body
- 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
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 16
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 16
- 238000005260 corrosion Methods 0.000 title claims abstract description 11
- 229910052750 molybdenum Inorganic materials 0.000 title claims abstract description 6
- 239000011733 molybdenum Substances 0.000 title claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 title abstract 3
- 239000011651 chromium Substances 0.000 title abstract 3
- 230000007797 corrosion Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 239000008186 active pharmaceutical agent Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention provides an anti-corrosion oil casing containing carbon, chromium and molybdenum elements. The oil casing comprises an oil casing body (1) and a coupling (3). An external thread (2) is arranged at the end of the oil casing body (1). An internal thread (4) is arranged on the coupling (3). The external thread (2) and the internal thread (4) are novel buttress conical threads. The thread pitch P is set to be 2 thread/in, and the thread tops are parallel to a pipe bus. The internal thread and the external thread are threads with the thread pitch being 2 thread/in. Compared with an API conventional thread with the thread pitch being 8 thread/in, thread screwing speed is greatly increased, and thread screwing and unscrewing efficiency is improved. Meanwhile, by means of the steel pipe material containing the carbon, chromium and molybdenum elements, the problem about corrosion resistance is solved in the aspect of raw materials. Meanwhile, the inner surface and the outer surface of a product are sprayed with anti-corrosion coatings, and the corrosion-resistant effect is improved.
Description
Technical field
The invention belongs to oil exploitation drilling equipment technical field, relate to oil casing threaded link technique and the aseptic technic of drilling equipment, 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 object of this invention is to provide a kind of containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, 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 invention provides a kind of containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, comprise tubing and casing body 1 and box cupling 3, oil pipe 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 present invention, 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 invention;
Fig. 2 is the structural representation of tubing and casing body male end of the present invention;
Fig. 3 is the structural representation of tubing and casing body female end of the present invention;
Fig. 4 is the enlarged diagram of helicitic texture of the present invention;
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 present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
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 invention provides a kind of containing middle carbon chrome molybdenum element rust-proof oil sleeve pipe, comprise tubing and casing body 1 and box cupling 3, oil pipe 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 present invention, 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 the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
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), oil pipe 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 |
|---|---|---|---|
| CN201510599259.7A CN105114005A (en) | 2015-09-18 | 2015-09-18 | Anti-corrosion oil casing containing carbon, chromium and molybdenum elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510599259.7A CN105114005A (en) | 2015-09-18 | 2015-09-18 | Anti-corrosion oil casing containing carbon, chromium and molybdenum elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105114005A true CN105114005A (en) | 2015-12-02 |
Family
ID=54662091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510599259.7A Pending CN105114005A (en) | 2015-09-18 | 2015-09-18 | Anti-corrosion oil casing containing carbon, chromium and molybdenum elements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105114005A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979559A (en) * | 2018-09-20 | 2018-12-11 | 广东科诺勘测工程有限公司 | A kind of steel bushing pipe connection |
| CN116291234A (en) * | 2023-05-22 | 2023-06-23 | 靖江特殊钢有限公司 | Corrosion-resistant oil casing and preparation method thereof |
-
2015
- 2015-09-18 CN CN201510599259.7A patent/CN105114005A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979559A (en) * | 2018-09-20 | 2018-12-11 | 广东科诺勘测工程有限公司 | A kind of steel bushing pipe connection |
| CN108979559B (en) * | 2018-09-20 | 2024-07-23 | 广东科诺勘测工程有限公司 | Steel sleeve connecting device |
| CN116291234A (en) * | 2023-05-22 | 2023-06-23 | 靖江特殊钢有限公司 | Corrosion-resistant oil casing and preparation method thereof |
| CN116291234B (en) * | 2023-05-22 | 2023-08-04 | 靖江特殊钢有限公司 | Corrosion-resistant oil casing and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151202 |