CN108169031B - High-temperature high-pressure three-point bending pressure kettle device for petroleum pipe - Google Patents

High-temperature high-pressure three-point bending pressure kettle device for petroleum pipe Download PDF

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Publication number
CN108169031B
CN108169031B CN201711332868.1A CN201711332868A CN108169031B CN 108169031 B CN108169031 B CN 108169031B CN 201711332868 A CN201711332868 A CN 201711332868A CN 108169031 B CN108169031 B CN 108169031B
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China
Prior art keywords
pressure
sealing
petroleum
flange
point bending
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CN201711332868.1A
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CN108169031A (en
Inventor
贺伟
张航
司冀
白博文
杨青春
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AVIC Aircraft Strength Research Institute
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AVIC Aircraft Strength Research Institute
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0042Pneumatic or hydraulic means
    • G01N2203/0048Hydraulic means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/0222Temperature
    • G01N2203/0226High temperature; Heating means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/026Specifications of the specimen
    • G01N2203/0262Shape of the specimen
    • G01N2203/0274Tubular or ring-shaped specimens

Abstract

The invention discloses a high-temperature high-pressure three-point bending pressure kettle device for a petroleum pipe, and belongs to the technical field of pipe tests. The device mainly comprises an oil cylinder, a guide rod, a V-shaped block and a sealing assembly, wherein the oil cylinder 11 pushes the guide rod, vertical and upward bending load is transmitted to a test piece through the V-shaped block, the pipe body is bent and deformed, and the sealing assembly is sealed at the moment. Real-time temperature in the kettle and real-time strain of the position of the pipe body patch are detected through a temperature measuring device and a high-temperature high-pressure signal leading-out device. The sealing structure with the sealing following and clearance compensation functions is adopted, so that the sealing reliability is ensured when the sealing surface is greatly deformed; the oil cylinder connecting structure has a heat insulation function and high-efficiency heat dissipation performance, and the influence of heat transferred from the kettle body on the oil cylinder during working is avoided.

Description

High-temperature high-pressure three-point bending pressure kettle device for petroleum pipe
Technical Field
The invention belongs to the technical field of pipe tests, and particularly relates to a high-temperature high-pressure three-point bending pressure kettle device for a petroleum pipe.
Background
Under the complex working conditions of high temperature, high pressure (internal pressure/external pressure), tension/compression, bending and the like in a deep well, no high-temperature and high-pressure kettle equipment capable of simulating three-point bending load of a pipe body exists at home and abroad at present. The high-temperature autoclave requires the following capabilities: the highest bearing internal pressure is 210 MPa; the working temperature is 180 ℃; has rough surface sealing capability; the sealing structure has certain clearance self-adaptive adjustment capability; the test piece can extend out from the two ends of the pressure kettle; a three-point bending loading device is arranged; after the test piece is bent and deformed in a high-temperature and high-pressure environment, two ends of the kettle body are sealed without leakage.
Disclosure of Invention
In order to solve the problems or realize the functions, the invention provides the pressure kettle device which is suitable for a high-temperature and high-pressure environment, has three-point bending test capability, is convenient to install on site and has high reliability.
The invention relates to a high-temperature high-pressure three-point bending pressure kettle device for petroleum pipes, which mainly comprises:
the pressure kettle comprises a pressure kettle main body and a pressure-bearing cavity, wherein the pressure-bearing cavity is provided with openings at two ends;
the flange is fixed at openings at two ends of the pressure kettle main body, a through hole matched with the outer diameter of the petroleum pipe is formed in the middle of the flange, and a conical step expanding outwards is formed in one surface, away from the pressure kettle main body, of the through hole of the flange;
the sealing assembly is sleeved on the petroleum pipe and arranged at an opening of a pressure-bearing containing cavity of the pressure kettle main body, one end of the sealing assembly is extruded on the end surface of the flange, and the other end of the sealing assembly is extruded on a step inside the pressure-bearing containing cavity;
the aligning mechanism is provided with a conical surface matched with the conical step and can lock the petroleum pipe when being pressed and fixed on the flange;
and the guide rod penetrates through the side wall of the pressure-bearing cavity of the pressure kettle main body and is divided into an inner end and an outer end by the side wall of the pressure-bearing cavity, the inner end is abutted to the petroleum pipe, and the outer end is connected with a piston rod of an oil cylinder.
Preferably, the sealing assembly sequentially comprises a sealing groove profile, an active sealing ring, a baffle and an adjusting section from one end contacting the flange to one end contacting the step inside the pressure-bearing cavity, wherein the sealing groove profile comprises a first part with a larger inner diameter and a second part with a smaller inner diameter, the active sealing element is arranged at the step position defined by the first part and the second part, and an air cavity is arranged between the sealing groove profile and the first part and can be filled with high-pressure air.
Preferably, an O-shaped ring and/or a check ring is arranged between the outer ring of the sealing groove profile and the inner wall of the pressure kettle main body.
Preferably, the inner end of the guide rod is pressed against the petroleum pipe through a V-shaped block.
Preferably, the oil cylinder is fixed on the side wall of the pressure-bearing cavity of the pressure kettle main body through a transition flange.
Preferably, heat insulation pads are arranged between the transition flange and the oil cylinder and between the guide rod and a piston rod of the oil cylinder.
Preferably, the pressure kettle main body is provided with a plurality of steps at the through hole penetrating through the guide rod, and is provided with a transition pressure plate with the plurality of steps in a matching manner, the transition pressure plate is sleeved on the guide rod, and sealing rings are arranged between the transition pressure plate and the guide rod, between the plurality of steps of the transition pressure plate and the plurality of steps of the through hole.
Preferably, the sealing ring comprises a fluorine rubber O-shaped ring and a retainer ring.
The invention has the advantages that:
(1) a novel high-temperature high-pressure three-point bending pressure kettle device is developed, and can simulate the working condition of an oil well pipe in a deep well more truly and provide technical support for formulating the performance evaluation standard of the oil pipe and the joint.
(2) The device can meet the high-temperature and high-pressure three-point bending test of 210MPa, 180 ℃ and dog-leg degree of 50 DEG/30 m.
(3) The kettle body end sealing structure with the following sealing function is developed, and the sealing of a sealing surface under the large deformation condition can be met.
(4) The three-point bending oil cylinder connecting structure with high-efficiency heat insulation performance and heat dissipation performance is developed, and the defect that the performance of the three-point bending oil cylinder is affected by heat transfer of a kettle body in the working process is overcome.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of a high-temperature high-pressure three-point bending autoclave device for petroleum pipes according to the invention.
FIG. 2 is a schematic view of the seal assembly of the embodiment of FIG. 1 according to the present invention.
FIG. 3 is a schematic view of a transition platen according to the embodiment of FIG. 1.
The device comprises a pressure kettle, a centering mechanism, a first connecting bolt, a flange, a sealing assembly, a pressure kettle main body, a guide rod, a transition pressure plate, a second connecting bolt, a transition flange and an oil cylinder, wherein the centering mechanism is 1, the first connecting bolt is 2, the flange is 3, the sealing assembly is 4, the pressure kettle main body is 5, the V-shaped block is 6, the guide rod is 7, the transition pressure plate is 8, the second connecting bolt is 9;
41 is a sealing groove profile, 42 is an active sealing ring, 43 is a baffle, 44 is an adjusting section, and 45 is an air cavity.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The invention provides a high-temperature high-pressure three-point bending pressure kettle device for petroleum pipes, which adopts a sealing structure with sealing following and clearance compensation functions, so that the sealing reliability is ensured when a sealing surface is greatly deformed; the three-point bending oil cylinder connecting structure has a heat insulation function and high-efficiency heat dissipation performance, and the influence of heat transferred from the kettle body on the three-point bending oil cylinder during working is avoided. Referring to fig. 1, the center adjusting mechanism mainly includes a center adjusting mechanism 1, a first connecting bolt 2, a flange 3, a sealing assembly 4, an autoclave main body 5, a V-shaped block 6, a guide rod 7, a transition pressure plate 8, a second connecting bolt 9, a transition flange 10 and an oil cylinder 11. Two supporting points at the upper parts of the aligning mechanisms 1 on the two sides and a loading point at the end part of the guide rod 7 form a three-point bending loading model together.
In the loading process, the oil cylinder 11 pushes the guide rod 7, the vertical and upward bending load is transmitted to the test piece through the V-shaped block 6, the pipe body is bent and deformed, and the sealing assembly 4 is sealed at the moment. Real-time temperature in the kettle and real-time strain of the position of the pipe body patch are detected through a temperature measuring device and a high-temperature high-pressure signal leading-out device. The design stroke of the oil cylinder is 15mm, and the design maximum load is 1200 KN.
The structure to which the present invention relates is described in detail below.
The pressure kettle main body 5 is a main part for testing the pipe, a pressure-bearing cavity is limited to provide a high-temperature and high-pressure environment, the high-temperature and high-pressure three-point bending test with the dog leg degree of 50 degrees/30 m at least at 210MPa and 180 ℃ can be met, and two ends of the pressure-bearing cavity are opened.
It can be understood that the temperature measuring device, the high-temperature high-pressure signal leading-out device, the pressurizing device and the like are connected with the pressure-bearing cavity through the through holes, and the temperature measuring device, the high-temperature high-pressure signal leading-out device, the pressurizing device and the like can be realized by adopting conventional design.
The flanges 3 are arranged at two ends of the pressure-bearing cavity to seal openings at two ends, the openings at two ends are fixed on the openings at two ends of the pressure kettle main body 5 through first connecting bolts, a through hole matched with the outer diameter of the petroleum pipe is formed in the middle of the pressure kettle main body, and one side, deviating from the pressure kettle main body 5, of the through hole of the flange 3 is provided with a conical step expanding outwards.
It will be appreciated that the inner bore R1 of the flange is smaller than the inner diameter R2 of the pressure-containing chamber and that the inner bore R1 of the flange is substantially the same as the outer diameter of the oil pipe (test piece), or a small clearance fit. The through hole of the flange 3 is provided with a conical step expanding outwards on one surface deviating from the pressure kettle main body 5 so as to install the aligning mechanism 1, namely the aligning mechanism, which is used for adjusting the central position of the petroleum pipe as the name implies, when the aligning mechanism 1 is not installed, the petroleum pipe can slide left and right as shown in figure 1, and after the aligning mechanism 1 is installed, the petroleum pipe is confined. The method specifically comprises the following steps: the aligning mechanism 1 is provided with a conical surface matched with the conical step, the aligning mechanism 1 is screwed on the flange 3 through bolts, a screwing force is applied, and the aligning mechanism 1 moves towards the axis direction of the petroleum pipe due to the existence of the conical surface, so that the petroleum pipe is extruded and locked.
The sealing component 4 is used for sealing the opening of the pressure-bearing cavity, is sleeved on the petroleum pipe and is arranged at the opening of the pressure-bearing cavity of the pressure kettle main body 5, one end of the sealing component is extruded on the end surface of the flange 3, and the other end of the sealing component is extruded on a step inside the pressure-bearing cavity.
It should be noted first that the internal diameter R2 of the bearing volume is relative to the internal diameter R1 of the through hole of the flange, and in practice the internal diameter of the bearing volume is not constant, but is greater near the flange relative to its central position, for example, it has an internal diameter R3 near the flange and an intermediate position internal diameter R2, thereby defining a step to which a section of the flange to which the above-mentioned seal assembly 4 is mounted. Referring to fig. 2, the specific structure of the sealing assembly 4 sequentially includes a sealing groove profile 41, a driving sealing ring 42, a baffle 43 and an adjusting section 44 from one end contacting the flange 3 to one end contacting the step inside the pressure-bearing cavity, wherein the sealing groove profile 41 includes a first portion with a larger inner diameter and a second portion with a smaller inner diameter, the driving sealing ring 42 is disposed at the step position defined by the first portion and the second portion, an air cavity 45 is disposed between the sealing groove profile 41 and the first portion, and the air cavity 45 can be filled with high-pressure air.
It can be understood that the air cavity 45 is communicated with the outside through a pipeline, a sealing pressurizing opening is formed in the pipeline, and pressure is injected into the sealing cavity of the active sealing ring through the sealing pressurizing opening, so that the active sealing ring contracts along the radial direction, a test piece is compressed, and a sealing function is realized. Because sealing pressure belongs to single pipeline, when by the slope of sealing member, the initiative sealing washer can follow the deformation, has guaranteed that sealed face can not appear the clearance, and sealing reliability is high.
In this embodiment, the sealing groove profile 41 and the active sealing ring 42 together form the main body of the sealing assembly 4, and the inner diameter thereof should be the same as the outer diameter of the oil pipe or slightly smaller than the inner diameter of the oil pipe, so that the interference fit is more favorable for sealing, but it should be understood that the inner diameter R2 at the middle position of the pressure-bearing cavity or the inner diameter R3 close to the flange described above should be larger than the outer diameter of the oil pipe or much larger than the outer diameter of the oil pipe, and R2 and R3 form a step, so that the thickness of the adjusting section 44 abutting against the step cannot be too large, and cannot be the same as the thickness of the main body of the sealing assembly 4 formed by the sealing groove profile 41 and the active sealing ring 42 together, for this reason, the baffle plate 43 is required to ensure that the pressing force provided by the step applied to the adjusting section 44 completely acts on the main body of the sealing, i.e. the baffle 43 is of one-piece design and has the same thickness as the main part of the upper sealing assembly 4.
In this embodiment, and with reference to FIG. 2, the adjustment segment 44 is connected to the stop 43 by a pin that provides axial stability to the adjustment segment 44 after compression.
In this embodiment, an O-ring and/or a retainer ring is disposed between the outer ring of the sealing groove-shaped member 41 and the inner wall of the autoclave body 5, and similarly, an O-ring and/or a retainer ring is also disposed between the outer ring of the baffle 43 and the inner wall of the autoclave body 5.
The guide rod 7 is used for providing radial force for the petroleum pipe, penetrates through the side wall of the pressure-bearing cavity of the pressure kettle main body 5, and is divided into an inner end and an outer end by the side wall of the pressure-bearing cavity, the inner end is connected to the petroleum pipe in a propping mode, and the outer end is connected with a piston rod of the oil cylinder 11. Referring to fig. 1, the inner end of the guide rod 7 is abutted against the petroleum pipe through the V-shaped block 6, and the V-shaped block 6 is selected and matched according to the actual size of the test piece, so that the local deformation of the pipe body of the test piece when a three-point bending load is applied is prevented.
In this embodiment, the oil cylinder 11 is fixed on the side wall of the pressure-bearing cavity of the pressure kettle main body 5 through the transition flange 10, and the piston rod of the oil cylinder is connected to the end part of the guide rod 7, in this embodiment, the transition flange 10 and between the oil cylinders 11, and the guide rod 7 and between the piston rods of the oil cylinders 11 are both provided with heat insulation pads, so that the heat of the kettle body is effectively prevented from being transferred to the oil cylinders, and the reliable work of the oil cylinders is ensured.
In this embodiment, referring to fig. 3, a plurality of steps are disposed at a through hole penetrating through the guide rod 7 on the pressure kettle main body 5, and a transition pressure plate having the plurality of steps is adapted to be installed on the pressure kettle main body, the transition pressure plate 8 is sleeved on the guide rod 7, and sealing rings are disposed between the transition pressure plate 8 and the guide rod 7, and between the plurality of steps of the transition pressure plate 8 and the plurality of steps of the through hole. Wherein, the sealing washer includes fluorine and glues O shape circle and retaining ring.
This embodiment provides three sealing washer of group between above-mentioned guide arm 7 and transition clamp plate 8 and pressure vessel main part 5, and 2 sealing washers compress tightly to cauldron body main part 5 through the transition clamp plate on, arrange 1 sealing washer of group between transition flange and the transition clamp plate. Because the seal belongs to high-temperature and high-pressure dynamic seal, the size of the gap between the guide rod and the transition pressure plate and between the guide rod and the transition flange determines the reliability of the seal.
The invention provides a pressure kettle device for a three-point bending test of a petroleum pipe in a high-temperature and high-pressure environment, which comprises the following steps: the sealing structure with the sealing following and clearance compensation functions is adopted, so that the sealing reliability is ensured when the sealing surface is greatly deformed; the oil cylinder connecting structure has a heat insulation function and high-efficiency heat dissipation performance, and the influence of heat transferred from the kettle body on the oil cylinder during working is avoided.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (7)

1. The utility model provides a petroleum tubular product high temperature high pressure three point bending pressure cauldron device which characterized in that includes:
the pressure kettle comprises a pressure kettle main body (5) and a pressure-bearing cavity, wherein two ends of the pressure-bearing cavity are opened;
the flange (3) is fixed at openings at two ends of the pressure kettle main body (5), a through hole matched with the outer diameter of the petroleum pipe is formed in the middle of the flange, and a conical step expanding outwards is formed in one surface, away from the pressure kettle main body (5), of the through hole of the flange (3);
a sealing component (4) which is sleeved on the petroleum pipe and arranged at the opening of the pressure-bearing containing cavity of the pressure kettle main body (5), one end of the sealing component is extruded on the end surface of the flange (3), the other end of the sealing component is extruded on the step inside the pressure-bearing containing cavity, the sealing component (4) sequentially comprises a sealing groove profile piece (41), a driving sealing ring (42), a baffle plate (43) and an adjusting section (44) from one end contacting the flange (3) to one end contacting the step in the pressure-bearing cavity, wherein the sealing groove profile (41) comprises a first part with a larger inner diameter and a second part with a smaller inner diameter, the active seal (42) is arranged at the step position defined by the first part and the second part, an air cavity (45) is arranged between the sealing groove profile (41) and the first part, and the air cavity (45) can be filled with high-pressure air;
the aligning mechanism (1) is provided with a conical surface matched with the conical step, can restrain the petroleum pipe when being pressed and fixed on the flange, and is used for adjusting the central position of the petroleum pipe;
and the guide rod (7) penetrates through the side wall of the pressure-bearing cavity of the pressure kettle main body (5) and is divided into an inner end and an outer end by the side wall of the pressure-bearing cavity, the inner end is connected to the petroleum pipe in a propping mode, and the outer end is connected with a piston rod of the oil cylinder (11).
2. The high-temperature high-pressure three-point bending autoclave device for petroleum pipes as claimed in claim 1, wherein an O-ring and/or a check ring is arranged between the outer ring of the seal groove profile (41) and the inner wall of the autoclave body (5).
3. The high-temperature high-pressure three-point bending autoclave device for petroleum pipes as claimed in claim 1, characterized in that the inner end of the guide rod (7) is pressed against the petroleum pipe by a V-shaped block (6).
4. The high-temperature high-pressure three-point bending autoclave device for petroleum pipes as claimed in claim 1, wherein the oil cylinder (11) is fixed on the side wall of the pressure-bearing cavity of the autoclave body (5) through a transition flange (10).
5. The high-temperature high-pressure three-point bending autoclave device for petroleum pipes as claimed in claim 4, wherein heat insulation pads are arranged between the transition flange (10) and the oil cylinder (11) and between the guide rod (7) and the piston rod of the oil cylinder (11).
6. The high-temperature high-pressure three-point bending autoclave device for petroleum pipes as claimed in claim 4, wherein the autoclave body (5) is provided with multiple steps at the through hole penetrating the guide rod (7), and is adapted to be provided with a transition pressure plate with multiple steps, the transition pressure plate (8) is sleeved on the guide rod (7), and sealing rings are arranged between the transition pressure plate (8) and the guide rod (7) and between the multiple steps of the transition pressure plate (8) and the multiple steps of the through hole.
7. A high temperature and high pressure three point bending autoclave apparatus for petroleum tubing as claimed in claim 6, wherein said seal ring comprises a fluorine rubber O-ring and a retainer ring.
CN201711332868.1A 2017-12-13 2017-12-13 High-temperature high-pressure three-point bending pressure kettle device for petroleum pipe Active CN108169031B (en)

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CN201711332868.1A CN108169031B (en) 2017-12-13 2017-12-13 High-temperature high-pressure three-point bending pressure kettle device for petroleum pipe

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Application Number Priority Date Filing Date Title
CN201711332868.1A CN108169031B (en) 2017-12-13 2017-12-13 High-temperature high-pressure three-point bending pressure kettle device for petroleum pipe

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CN108169031B true CN108169031B (en) 2020-05-19

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Publication number Priority date Publication date Assignee Title
CN109142087A (en) * 2018-07-02 2019-01-04 上海交通大学 Texture evolution home position observation experimental provision, system and application method
CN109916708B (en) * 2019-03-21 2021-05-11 佛山市兴上宇不锈钢有限公司 Bending strength detection device for stainless steel hollow pipe

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CN105351525A (en) * 2015-12-08 2016-02-24 中国飞机强度研究所 Petroleum pipe sealing device
CN106734410A (en) * 2016-12-30 2017-05-31 南京理工大学 ERW three-point bending flexibility cold bending roller position determines method

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Publication number Priority date Publication date Assignee Title
JP2007307615A (en) * 2006-04-17 2007-11-29 Nippon Steel Corp Apparatus and method of press-bending tubular material
CN103439192A (en) * 2013-08-23 2013-12-11 天津钢管集团股份有限公司 High-pressure autoclave device capable of simulating external pressure and bending load applied to underground petroleum tubular goods
CN204164546U (en) * 2014-10-27 2015-02-18 四川汇金不锈钢管道有限公司 Stainless steel pipeline connects position limiting sealed circle and sealed tube structure
CN204300024U (en) * 2014-12-04 2015-04-29 江西博茂机械有限公司 A kind of intelligent Bidirectional piston type oil cylinder
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CN106734410A (en) * 2016-12-30 2017-05-31 南京理工大学 ERW three-point bending flexibility cold bending roller position determines method

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