CN210318857U - Bimetal corrosion-resistant oil casing and connecting device thereof - Google Patents
Bimetal corrosion-resistant oil casing and connecting device thereof Download PDFInfo
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- CN210318857U CN210318857U CN201921125772.2U CN201921125772U CN210318857U CN 210318857 U CN210318857 U CN 210318857U CN 201921125772 U CN201921125772 U CN 201921125772U CN 210318857 U CN210318857 U CN 210318857U
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Abstract
The utility model discloses a bimetal corrosion resistant oil casing and connecting device thereof, bimetal corrosion resistant oil casing connecting device include two bimetal corrosion resistant oil casings of being connected by the coupling. The bimetallic corrosion-resistant oil casing comprises a base pipe and a lining pipe which is made of stainless steel and is internally attached to the base pipe, and the end part of the lining pipe is provided with an outward flanging which is folded into a right-angle shape. The two base pipes are respectively a first base pipe and a second base pipe, the two lining pipes are respectively a first lining pipe and a second lining pipe, the end part of the first lining pipe is provided with a first lining pipe flanging, and the end part of the second lining pipe is provided with a second lining pipe flanging; an outer flanging of the adjacent inner lining pipe abuts against the outer flanging of the inner lining pipe to form a limiting sealing structure. Effectively prevent the interior bushing pipe drunkenness in the parent tube to can effectively prevent the leakage of interior bushing pipe petroleum etc. protect bimetal corrosion resistant oil sleeve not to corrode. And the cost is obviously lower than that of the oil casing pipe made of the integral stainless steel material, and the oil casing pipe has wide application prospect.
Description
Technical Field
The utility model relates to an oil casing technical field, specifically speaking relates to a bimetal corrosion resistant oil casing and connecting device thereof.
Background
With the continuous development of energy industries at home and abroad and the continuous increase of the demand of society on oil and gas resources, the oil well conditions of large oil production areas at home and abroad tend to be severe continuously, oil and gas wells under corrosion conditions are more and more, at present, the main protection means for the oil and gas wells in the corrosion environment is to adopt an anti-corrosion oil sleeve, the pipe is mostly made of integral stainless steel, and the purchase cost of the oil field is high due to the high manufacturing cost.
Disclosure of Invention
The utility model discloses a first technical problem that will solve is: the utility model provides a bimetal corrosion resistant oil sleeve can effectively prevent bimetal corrosion resistant oil sleeve by the corruption in the use to compare in whole stainless steel's oil sleeve can reduce cost.
In order to solve the technical problem, the technical scheme of the utility model is that:
the bimetal corrosion-resistant oil casing comprises a base pipe and a lining pipe which is internally attached to the base pipe and is made of stainless steel, wherein the end part of the lining pipe is provided with an outward flanging which is folded into a right-angle shape.
Further, the flanging extends outwards to the outer surface of the base pipe.
The utility model discloses the second technical problem that will solve is: the utility model provides a bimetal corrosion resistant oil sleeve connecting device can effectively prevent bimetal corrosion resistant oil sleeve by the corruption in the use to compare in whole stainless steel's oil sleeve can reduce cost.
In order to solve the technical problem, the technical scheme of the utility model is that:
the bimetal corrosion-resistant oil casing connecting device comprises two bimetal corrosion-resistant oil casings which are connected by a coupling; the two base pipes are respectively a first base pipe and a second base pipe, the two lining pipes are respectively a first lining pipe and a second lining pipe, the end part of the first lining pipe is provided with a first flanging of the lining pipe, and the end part of the second lining pipe is provided with a second flanging of the lining pipe; and an adjacent outer flanging of the inner lining pipe is abutted against the outer flanging of the inner lining pipe to form a limiting sealing structure.
Furthermore, the base pipe I and the base pipe II are both in threaded connection with the coupling.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the bimetal corrosion-resistant oil casing connecting device comprises two bimetal corrosion-resistant oil casings connected by a coupling. The bimetallic corrosion-resistant oil casing comprises a base pipe and a lining pipe which is made of stainless steel and is internally attached to the base pipe, and the end part of the lining pipe is provided with an outward flanging which is folded into a right-angle shape. The two base pipes are respectively a first base pipe and a second base pipe, the two lining pipes are respectively a first lining pipe and a second lining pipe, the end part of the first lining pipe is provided with a first lining pipe flanging, and the end part of the second lining pipe is provided with a second lining pipe flanging; an outer flanging of the adjacent inner lining pipe abuts against the outer flanging of the inner lining pipe to form a limiting sealing structure. Effectively prevent the interior bushing pipe drunkenness in the parent tube to can effectively prevent the leakage of interior bushing pipe petroleum etc. protect bimetal corrosion resistant oil sleeve not to corrode. The base pipe of outer API standard bears intensity requirements such as pressure, tensile, the inside lining pipe of the stainless steel material of inside lining bears corrosion resisting property, cooperates seal structure to realize the sealing performance of bimetal corrosion resistant oil sleeve, satisfies the oil field to oil sleeve intensity, corrosion resisting property, sealing performance's requirement, and the cost is showing to be less than adopting the oil sleeve of whole stainless steel material manufacturing moreover, possesses wide use prospect.
Drawings
FIG. 1 is a schematic structural view of a bimetallic corrosion-resistant oil casing and a connecting device thereof according to the present invention;
FIG. 2 is an enlarged view of a portion of area A of FIG. 1;
in the figure, 1-a first base pipe, 11-a first base pipe coupling connecting section, 2-a second base pipe, 21-a second base pipe coupling connecting section, 3-a coupling, 31-a first base pipe coupling section, 32-a second base pipe coupling section, 4-a first lining pipe, 41-a first lining pipe flanging, 5-a second lining pipe, 51-a lining pipe flanging.
Detailed Description
The invention will be further described with reference to the following figures and examples:
referring to fig. 1 and 2, a corrosion-resistant oil casing connecting apparatus includes two corrosion-resistant oil casings connected by a collar 3. The bimetallic corrosion-resistant oil casing comprises a base pipe and an inner lining pipe which is internally attached to the inner surface of the base pipe and made of stainless steel, and an outward flanging which is outwards turned into a right-angle shape is arranged at the end part of the inner lining pipe. Preferably, the two ends of the lining pipe are both provided with outward flanges which are folded outwards to form a right angle.
Two parent tubes are parent tube 1 and parent tube two 2 respectively, are provided with parent tube one coupling linkage segment 11 on parent tube 1, are provided with parent tube two coupling linkage segments 21 on parent tube two 2, are provided with parent tube one linkage segment 31 on coupling 3, are provided with parent tube two linkage segments 32 on coupling 3, and parent tube one 1 and parent tube two 2 all with the preferred threaded connection of coupling 3.
The two lining pipes are respectively a first lining pipe 4 and a second lining pipe 5, the inner surface of the first base pipe 1 is attached to the inner surface of the first lining pipe 4, and the inner surface of the second base pipe 2 is attached to the inner surface of the second lining pipe 5. The end part of the first lining pipe 4 is provided with a first lining pipe flanging 41, and the end part of the second lining pipe 5 is provided with a second lining pipe flanging 51; and an adjacent inner lining pipe flanging 41 and an adjacent inner lining pipe flanging 51 are tightly abutted together to form a limiting sealing structure.
The outer flange preferably extends outwardly to the outer surface of the base pipe, the outer end face of the outer flange being flush with the outer surface of the base pipe.
In use, a plurality of bimetallic corrosion resistant oil casings are connected together in sequence by a collar 3. The flanging at the two ends of the lining pipe can effectively prevent the lining pipe from moving inside the base pipe. The adjacent one of the flanging 41 of the inner lining pipe and the flanging 51 of the inner lining pipe are tightly abutted together to play a sealing role, so that the petroleum is prevented from leaking and corroding the outer base pipe.
By adopting a cold drawing or/and cold expanding process method and a cold flanging process, the pipe body of the lining pipe lined with the stainless steel material can be tightly attached and fixed on the base pipe, so that the bimetal corrosion-resistant oil casing pipe has a stable pipe body structure and the pipe body anti-collapse capability exceeding that of the base pipe while realizing the corrosion resistance.
By adopting the structural form of end face and tight sealing, the corrosion resistance of the inner hole of the oil sleeve is ensured, and meanwhile, the sealing performance of the oil sleeve is realized.
Taking a 139.7 × 9.17, N80 steel grade, buttress thread casing bimetallic corrosion resistant oil casing of API standard as an example, the wall thickness of the stainless steel lining pipe is 2mm, and the scheme for realizing the stainless steel lining pipe is as follows:
1. 139.7 x 9.17 API standard, 139.7mm outer diameter, 9.17mm wall thickness, 121.36mm nominal inner bore diameter;
2. the lining pipe made of stainless steel is added, and the following two measures are adopted:
a. firstly, the total wall thickness of the lining pipe made of the lining stainless steel material is ensured to be unchanged, namely the total wall thickness of the bimetal corrosion-resistant oil casing pipe after the lining process is implemented is 9.17 mm. Namely: the thickness of the lining pipe made of stainless steel is 2mm, and the thickness of the base pipe is 7.17 mm. According to the design, after the lining pipe made of stainless steel is lined, the wall thickness of the whole bimetal corrosion-resistant oil sleeve is ensured to be unchanged, the diameter of the inner hole of the bimetal corrosion-resistant oil sleeve is unchanged, and the overflowing area of the inner hole of the bimetal corrosion-resistant oil sleeve is also unchanged;
according to this design, the wall thickness of parent tube is 7.17mm, compares standard oil casing's wall thickness 9.17mm, and the tensile strength and the collapse resistance intensity of the body of parent tube reduce, and the oil field needs the body intensity of accounting parent tube when carrying out oil well tubular column design to satisfy the tubular column design requirement.
b. And secondly, the wall thickness of the base pipe after the lining pipe lined with the stainless steel material is ensured to be unchanged, namely the total wall thickness of the oil casing pipe after the lining process is implemented is 11.17 mm. Namely: the wall thickness of the stainless steel lining pipe is 2mm, and the wall thickness of the base pipe is 9.17 mm. According to the design, after the stainless steel lining pipe is lined, the wall thickness of the base pipe is ensured to be unchanged, and the inner hole of the bimetallic corrosion-resistant oil sleeve is reduced;
according to the design, the wall thickness of the base pipe is 9.17mm, compared with the wall thickness of a standard oil casing pipe of 9.17mm, the tensile strength and the collapse resistance strength of the body of the base pipe are kept unchanged, the diameter of an inner hole of the bimetal corrosion-resistant oil casing pipe is reduced by 4mm, and the nominal diameter is 117.36 mm. When the oil well pipe column is designed in the oil field, the problem of inner bore drift diameter of the double-metal corrosion-resistant oil casing pipe is only needed to be considered, and the design requirement of the pipe column is met.
Under the condition of realizing corrosion resistance, the lining pipe lined with the stainless steel material also enhances the collapse resistance of the pipe body.
The thickness of the stainless steel liner tube is optional. The selection basis is as follows: according to the corrosion resistance indexes of the stainless steel material: such as annual corrosion rate and the like, and is determined after comprehensively considering the safety of the pipe column by combining the factors of the corrosivity of the well condition of the oil field, the design life of the pipe column and the like. The variation range of the wall thickness of the lining pipe made of stainless steel is 1.5-3 mm.
The stainless steel material of the present invention may include, but is not limited to, 304 stainless steel, 316L stainless steel, etc.
The technical features (such as the first base pipe, the second base pipe, the first lining pipe, the second lining pipe, the first flanging of the first lining pipe, the second flanging of the second lining pipe, etc.) referred to in the description with serial numbers are only for distinguishing the technical features and do not represent the position relationship, the installation sequence, the working sequence, etc. among the technical features.
In the description of the present specification, it is to be understood that the orientations or positional relationships described in the terms "first inner liner tube", "second inner liner tube", "first inner liner tube flanging", "outer surface", "outward", and the like are based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
The above description is only an example of the best mode of carrying out the invention and the details not mentioned in detail are the common general knowledge of a person skilled in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (4)
1. The bimetal corrosion-resistant oil casing is characterized by comprising a base pipe and a lining pipe which is internally attached to the base pipe and is made of stainless steel, wherein the end part of the lining pipe is provided with an outward flanging which is outwards folded into a right-angle shape.
2. The bimetallic corrosion resistant oil bushing of claim 1, wherein the flange extends outwardly to an outer surface of the base pipe.
3. A bimetal corrosion resistant oil casing connecting device, characterized by comprising two bimetal corrosion resistant oil casings according to claim 1 or 2, wherein the two bimetal corrosion resistant oil casings are connected by a coupling; the two base pipes are respectively a first base pipe and a second base pipe, the two lining pipes are respectively a first lining pipe and a second lining pipe, the end part of the first lining pipe is provided with a first flanging of the lining pipe, and the end part of the second lining pipe is provided with a second flanging of the lining pipe; and an adjacent outer flanging of the inner lining pipe is abutted against the outer flanging of the inner lining pipe to form a limiting sealing structure.
4. The bimetallic corrosion resistant oil casing connection of claim 3, wherein said first base pipe and said second base pipe are both threadedly connected to said collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921125772.2U CN210318857U (en) | 2019-07-17 | 2019-07-17 | Bimetal corrosion-resistant oil casing and connecting device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921125772.2U CN210318857U (en) | 2019-07-17 | 2019-07-17 | Bimetal corrosion-resistant oil casing and connecting device thereof |
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| CN210318857U true CN210318857U (en) | 2020-04-14 |
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| CN201921125772.2U Active CN210318857U (en) | 2019-07-17 | 2019-07-17 | Bimetal corrosion-resistant oil casing and connecting device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273653A (en) * | 2019-07-17 | 2019-09-24 | 山东墨龙石油机械股份有限公司 | Bimetallic is anti-corrosion tubing and casing and its attachment device |
| CN112032427A (en) * | 2020-09-15 | 2020-12-04 | 东营市正能石油科技有限公司 | Anti-corrosion oil pipe for oil field |
-
2019
- 2019-07-17 CN CN201921125772.2U patent/CN210318857U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273653A (en) * | 2019-07-17 | 2019-09-24 | 山东墨龙石油机械股份有限公司 | Bimetallic is anti-corrosion tubing and casing and its attachment device |
| CN112032427A (en) * | 2020-09-15 | 2020-12-04 | 东营市正能石油科技有限公司 | Anti-corrosion oil pipe for oil field |
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