CN211344268U - Oil gas conveying pipe - Google Patents
Oil gas conveying pipe Download PDFInfo
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- CN211344268U CN211344268U CN201922151358.5U CN201922151358U CN211344268U CN 211344268 U CN211344268 U CN 211344268U CN 201922151358 U CN201922151358 U CN 201922151358U CN 211344268 U CN211344268 U CN 211344268U
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Abstract
The utility model provides an oil gas conveying pipe belongs to oil gas conveying equipment technical field, and oil gas conveying pipe includes steel pipe and welded layer, the welded layer set firmly in the tip of steel pipe, the welded layer centers on the axis of steel pipe is evenly located the surface of steel pipe. The utility model provides an oil and gas conveying pipe can increase the area of steel pipe tip circumferential weld, has avoided the stress concentration of circumferential weld department, and the periphery of convenient butt welding layer is processed moreover, guarantees the precision and the circularity of steel pipe butt joint, does not need the reuse expander to prop up the pipe end, and the butt joint is firm, eliminates the potential safety hazard.
Description
Technical Field
The utility model belongs to the technical field of oil gas conveying equipment, more specifically say, relate to an oil gas conveying pipe.
Background
The pipeline is an efficient and economic conveying mode, and is a main mode for long-distance petroleum and natural gas conveying. At present, oil gas pipelines such as a west gas east pipeline, a west gas east second line/third line/fourth line, a Chinese Russian crude oil pipeline, a Chinese Asia pipeline and a Chinese Mai pipeline and the like are built in China for more than 12 kilometers, but the requirement of rapid increment of oil gas requirements in China cannot be met, and the construction of the oil gas pipelines is still in a rapid development stage.
The existing pipeline realizes long-distance oil and gas transmission by connecting a large number of single steel pipes in a direct girth welding mode. As the toughness of the circumferential weld deposited metal is difficult to reach the toughness of the steel pipe body adopting the controlled rolling and controlled cooling technology, high toughness matching is difficult to form during butt joint, and the strength and the toughness of the circumferential weld joint at the pipe end are weak and poor. The existing oil gas conveying pipe comprises a longitudinal seam submerged arc welded pipe, a spiral seam submerged arc welded pipe and an HFW welded pipe, which are formed by bending or die bending, a seamless steel pipe is formed by rolling, the geometric size precision of the pipe end is poor, the diameter difference of the butt joint end of the steel pipe is large, the geometric precision is not enough, the edge staggering is easy to generate during the ring welding butt joint, and the internal stress is easy to form by strong assembly; in addition, in order to ensure that the two steel pipes are successfully butted, the steel pipes need to be forcibly rounded and then welded by using equipment such as a pipe expander during the butting, and the residual stress of a circumferential weld is large because the steel pipes are in the elastic deformation range during the pipe expanding, so that the bearing capacity is reduced, or cracks are easily induced and promoted to expand. Due to the reasons, when the oil and gas conveying pipeline is subjected to external force, stress concentration is most easily formed at the circumferential weld joint, pipeline quality safety accidents caused by failure of the circumferential weld joint often occur, and huge losses are brought to the life and property of people and economic development.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oil and gas conveying pipe aims at solving the current oil and gas conveying pipe joint intensity when butt joint and is weaker, and the not enough technical problem of tip geometric dimensions precision.
In order to achieve the above object, the utility model adopts the following technical scheme: there is provided an oil and gas transfer pipe comprising:
a steel pipe; and
and the welding layer is fixedly arranged at the end part of the steel pipe, and is uniformly arranged on the surface of the steel pipe around the axis of the steel pipe.
As another embodiment of the present application, the welding layer is fixedly disposed on the outer side and/or the inner side of the steel pipe.
As another embodiment of this application, the one end on welding layer with the terminal surface parallel and level of steel pipe, the other end are equipped with the changeover portion, the changeover portion with the steel pipe surface is predetermines the contained angle setting.
As another embodiment of the present application, the preset included angle is not less than 120 °.
As another embodiment of the present application, the solder layer comprises one or more solder layers.
As another embodiment of the application, the length of the welding layer is 30 mm-1000 mm; the thickness of the welding layer is 20% -100% of the thickness of the end part of the steel pipe.
As another embodiment of the application, the surface of one side of the welding layer, which is far away from the steel pipe, is a cylindrical surface, and the radial deviation between the cylindrical surface and an ideal cylindrical surface is less than or equal to 2 mm.
As another embodiment of the application, the diameter of the end part of the steel pipe is larger than 400mm, and the out-of-roundness deviation of the end part of the steel pipe connected with the welding layer is less than or equal to 3 mm.
As another embodiment of the present application, the end surface of the steel pipe is a flat end surface or a beveled end surface.
The utility model provides an oil gas conveying pipe's beneficial effect lies in: compared with the prior art, the oil and gas conveying pipe has the advantages that the welding layer is arranged at the end part of the steel pipe, so that the end part of the steel pipe is thickened, when the end parts of the two steel pipes are butted in a girth welding mode, the sectional area of the girth welding line is increased due to the increase of the thickness of the end part, the stress bearing capacity of the girth welding line is improved, and the stress concentration at the girth welding line is avoided; moreover, the end part of the steel pipe is thickened by connecting the welding layer with the steel pipe, the periphery of the welding layer can be conveniently processed, the diameter and the roundness of the butt joint of the end part of the steel pipe can be conveniently adjusted, the geometric dimension precision of the end part of the steel pipe is improved, the pipe end does not need to be forcibly supported by a pipe expander during butt joint, the butt joint stress is reduced, and the butt joint efficiency is improved. When the pipeline is strained by external force, the strain is distributed in the steel pipe and is not concentrated at the circumferential weld, so that the deformation bearing capacity of the pipeline is greatly improved, the butt joint is firm, and the potential safety hazard is eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural view of an oil and gas delivery pipe provided in an embodiment of the present invention;
fig. 2 is a schematic sectional view of an oil and gas delivery pipe provided in an embodiment of the present invention;
fig. 3 is a schematic sectional view of an oil and gas delivery pipe provided in the third embodiment of the present invention;
fig. 4 is a left side view of the oil and gas delivery pipe provided by the third embodiment of the present invention;
fig. 5 is a schematic diagram of a cross-sectional structure of the butt joint of the oil and gas delivery pipe provided by the third embodiment of the present invention.
In the steel tube drawing: 1. a steel pipe; 2. welding the layers; 3. a transition section.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, the oil and gas delivery pipe of the present invention will now be described. Oil gas transfer pipe, including steel pipe 1 and welded layer 2, welded layer 2 sets firmly in the tip of steel pipe 1, and welded layer 2 evenly locates the surface of steel pipe 1 around the axis of steel pipe 1.
The utility model provides an oil gas conveying pipe's beneficial effect lies in: compared with the prior art, the utility model discloses oil gas conveying pipe has set up welding layer 2 at the tip of steel pipe 1, makes the tip of steel pipe 1 bodiness, when the butt joint is carried out through the mode of girth welding in the tip of two steel pipes 1 like this (wherein the tip refers to the butt joint end that tip and welding layer 2 of steel pipe 1 itself constitute jointly, the tip that indicates hereafter is the same with the tip that here shows), because tip thickness increases, the sectional area of girth welding also increases, improves the stress bearing capacity of girth welding, has avoided the stress concentration of girth welding department; moreover, the end of the steel pipe is thickened by connecting the welding layer with the steel pipe, the periphery of the welding layer 2 can be conveniently processed, the diameter and the roundness of the butt joint of the end of the steel pipe 1 can be conveniently adjusted, the geometric dimension precision of the end of the steel pipe 1 is improved, the pipe end does not need to be supported by a pipe expander by force during butt joint, the butt joint stress is reduced, and the butt joint efficiency is improved. When the pipeline is strained by external force, the strain is distributed in the steel pipe 1 and is not concentrated at the circumferential weld, so that the deformation bearing capacity of the pipeline is greatly improved, the butt joint is firm, and potential safety hazards are eliminated.
As a specific embodiment of the oil and gas delivery pipe provided by the present invention, please refer to fig. 1 to 3, the welding layer 2 is disposed on the inner surface and/or the outer surface of the steel pipe 1. Through the intensity of guaranteeing the 1 tip of steel pipe in the position that the steel pipe 1 is different with the welding of welding layer 2, strengthen the bearing capacity of 1 tip of steel pipe to stress, the thickness of confirming welding layer 2 that this structure can be nimble as required solves the problem that traditional 1 butt joint of steel pipe can't realize the circumferential weld high strength matching, guarantees the variety of 1 tip thickening of steel pipe, does benefit to processing.
As a specific embodiment of the oil and gas conveying pipe, please refer to fig. 1 to 3, the one end of the welding layer 2 is flush with the end face of the steel pipe 1, the other end is provided with the transition section 3, and the transition section 3 is the preset included angle with the surface of the steel pipe 1. One end of the welding layer 2 and the end face of the steel pipe 1 form a new end face, which is beneficial to butt joint of the ends of the steel pipe 1; the other end is provided with the transition section 3, so that smooth transition can be formed between the welding layer 2 and the surface of the steel pipe 1, the formation of a sharp corner is prevented, stress concentration is avoided, safety is ensured, and the quality of the welding layer 2 is ensured because no sharp corner exists and the welding layer 2 is prevented from being damaged by external force when the sharp corner is acted.
As a specific embodiment of the oil and gas delivery pipe of the present invention, please refer to fig. 1 to 3, the preset included angle is not less than 120 °. In the figure, alpha is a preset included angle which is more than or equal to 120 degrees, so that the gentle degree of the transition section 3 can be ensured, the stress concentration is reduced, the stress distribution of the thickened part and the non-thickened part of the steel pipe 1 is reasonable, and the butt joint quality of the end part of the thickened steel pipe 1 is ensured.
As a specific embodiment of the oil and gas conveying pipe provided by the utility model, the welding layer 2 contains one or more welding layers. The welding layer 2 can be directly welded at the end part of the steel pipe 1 through a layer of welding material, and can also be welded for multiple times, one-time welding can simplify the processing flow, the labor intensity is reduced, the quality of the welding layer 2 can be optimized through multiple times of processing, and the bearing capacity of the end part of the steel pipe 1 is enhanced.
Specifically, when the welding material is welded to the surface of the steel pipe 1 a plurality of times, a metallurgical bond is formed between adjacent weld layers. Welding materials can be melted through an electric arc melting welding mode, a welding layer 2 is formed after cooling, the metallurgical bonding between the adjacent welding layers can guarantee the bonding strength between the welding layer 2 and the steel pipe 1, and the strength and the toughness of the end part of the steel pipe 1 are guaranteed.
As a specific embodiment of the oil and gas delivery pipe provided by the present invention, please participate in fig. 1 to 3, the parameters of the welding layer 2 include: the length of the welding layer 2 and the thickness of the welding layer 2, wherein the length of the welding layer 2 is 30-1000 mm; the thickness of the welding layer 2 is 20-100% of the thickness of the end part of the steel pipe 1. The length of the welding layer 2 is calculated from the end face of the steel pipe 1, and the length of the welding layer 2 under different conditions is different according to the conditions of field butt joint equipment, the machining amount, the reserved amount, the economical efficiency and other factors of the end part of the steel pipe 1; the thickness of the welding layer 2 is determined by calculation according to the matching degree of the girth weld joint and the steel pipe 1, the stress bearing level of the girth weld joint, the machining allowance and the like, the end part of the steel pipe 1 can be thickened by optimization through calculation, and then the connection strength of the girth weld joint between the butt joints of the steel pipes 1 is optimized.
As a specific embodiment of the oil and gas conveying pipe provided by the present invention, please refer to fig. 4, a side surface of the welding layer 2 away from the steel pipe 1 is a cylindrical surface, and a radial deviation between the cylindrical surface and an ideal cylindrical surface is less than or equal to 2 mm. The roundness of the welding layer 2 can be guaranteed by the structure, the butt joint quality of the steel pipe 1 is improved, frequent adjustment or pipe replacement due to size problems during field butt joint is effectively reduced, and the working efficiency is improved.
As a specific embodiment of the oil and gas conveying pipe provided by the present invention, please refer to fig. 4, the diameter of the end of the steel pipe 1 is greater than 400mm, and the out-of-roundness deviation of the end of the steel pipe 1 after being connected with the welding layer 2 is less than or equal to 3 mm. The diameter range of the end part of the steel pipe 1 can cover most of long-distance pipelines, the out-of-roundness deviation can reduce the problems of large butt joint misalignment and poor butt joint quality of the existing steel pipe 1, the position of the steel pipe 1 does not need to be frequently adjusted, the specification of the steel pipe 1 does not need to be selected, the butt joint and adjustment time is reduced, and the construction efficiency is improved.
As a specific embodiment of the oil and gas conveying pipe provided by the present invention, please refer to fig. 1 to 5, the end surface of the steel pipe 1 is a flat end surface or an end surface with a groove. The end face of the steel pipe 1 can be machined into a flat end face or a beveled end face by a turning or grinding method according to needs, the bearing strength of a girth weld when the end parts of the steel pipe 1 are butted can be changed conveniently according to needs, the quality of the girth weld butt joint of the steel pipe 1 is ensured, and correspondingly, the end face of the welding layer 2 can also be machined.
As a specific embodiment of the oil and gas conveying pipe, please refer to fig. 5, the butt joint of the ends of two steel pipes 1 is provided with a circumferential weld, and the thickness of the circumferential weld is greater than the thickness of the body of the steel pipe 1. The strength of the joint when the two steel pipes 1 are butted is ensured, and high strength and toughness matching is realized.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. Oil gas transfer pipe, its characterized in that includes:
a steel pipe; and
and the welding layer is fixedly arranged at the end part of the steel pipe, and is uniformly arranged on the surface of the steel pipe around the axis of the steel pipe.
2. The oil and gas transport pipe of claim 1, wherein the weld layer is fixedly attached to an outer side and/or an inner side of the steel pipe.
3. The oil and gas delivery pipe of claim 2, wherein one end of the welding layer is flush with the end face of the steel pipe, and the other end of the welding layer is provided with a transition section, and the transition section and the surface of the steel pipe are arranged at a preset included angle.
4. The hydrocarbon transport pipe of claim 3, wherein the predetermined included angle is not less than 120 °.
5. The oil and gas transport pipe of claim 1, wherein the weld layer comprises one or more weld layers.
6. The oil and gas transport pipe of claim 1, wherein the length of the weld layer is 30mm to 1000 mm; the thickness of the welding layer is 20% -100% of the thickness of the end part of the steel pipe.
7. The oil and gas delivery pipe of claim 1, wherein the surface of the weld on the side away from the steel pipe is a cylindrical surface, and the radial deviation between the cylindrical surface and the ideal cylindrical surface is less than or equal to 2 mm.
8. The hydrocarbon transport pipe of claim 1, wherein the diameter of the end of the steel pipe is greater than 400mm, and the out-of-roundness deviation of the end of the steel pipe after joining the welded layer is 3mm or less.
9. The oil and gas delivery pipe of claim 1, wherein the end face of the steel pipe is a flat end face or a beveled end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151358.5U CN211344268U (en) | 2019-12-04 | 2019-12-04 | Oil gas conveying pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151358.5U CN211344268U (en) | 2019-12-04 | 2019-12-04 | Oil gas conveying pipe |
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| Publication Number | Publication Date |
|---|---|
| CN211344268U true CN211344268U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922151358.5U Active CN211344268U (en) | 2019-12-04 | 2019-12-04 | Oil gas conveying pipe |
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| CN (1) | CN211344268U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778804A (en) * | 2019-12-04 | 2020-02-11 | 中国石油集团渤海石油装备制造有限公司 | Oil and gas conveying pipe and manufacturing method thereof |
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2019
- 2019-12-04 CN CN201922151358.5U patent/CN211344268U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778804A (en) * | 2019-12-04 | 2020-02-11 | 中国石油集团渤海石油装备制造有限公司 | Oil and gas conveying pipe and manufacturing method thereof |
| CN110778804B (en) * | 2019-12-04 | 2024-06-11 | 中国石油集团渤海石油装备制造有限公司 | Oil gas conveying pipe and manufacturing method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200930 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee after: JULONG STEEL PIPE Co.,Ltd. Address before: 300457 No. second, No. 83, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee before: JULONG STEEL PIPE Co.,Ltd. |