CN109488224B - Method for manufacturing oil pipe, coupling and coupling - Google Patents
Method for manufacturing oil pipe, coupling and coupling Download PDFInfo
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- CN109488224B CN109488224B CN201910000852.3A CN201910000852A CN109488224B CN 109488224 B CN109488224 B CN 109488224B CN 201910000852 A CN201910000852 A CN 201910000852A CN 109488224 B CN109488224 B CN 109488224B
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- oil pipe
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- 230000008878 coupling Effects 0.000 title claims abstract description 32
- 238000010168 coupling process Methods 0.000 title claims abstract description 32
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 14
- 238000007789 sealing Methods 0.000 claims abstract description 70
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- 238000003801 milling Methods 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 6
- 238000007514 turning Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 2
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical group [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 69
- 230000000694 effects Effects 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 2
- 235000009120 camo Nutrition 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 235000005607 chanvre indien Nutrition 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011487 hemp Substances 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
- E21B17/085—Riser connections
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention relates to the technical field of oil pipes and hoops, in particular to a manufacturing method of an oil pipe, a coupling and a coupling, which comprises an upper oil pipe body, wherein the bottom of the upper oil pipe body is connected with an upper flange sleeve, the upper flange sleeve is uniformly and fixedly provided with upper connecting holes in a clamping manner, the end surface, away from the upper oil pipe body, of the upper flange sleeve is correspondingly provided with a sealing washer, the end surface, away from the upper flange sleeve, of the sealing washer is correspondingly provided with a lower flange sleeve, the end surface, away from the sealing washer, of the lower flange sleeve is connected with a lower oil pipe body, the lower flange sleeve is fixedly provided with lower connecting holes, the lower oil pipe body penetrates through the lower flange sleeve and extends into the lower flange sleeve, and an external thread section is fixedly arranged on the lower oil pipe body and positioned. The invention can ensure that the connection of the connecting device is more stable and has the advantages of high corrosion resistance, strong abrasion resistance, good sealing performance and the like.
Description
Technical Field
The invention relates to the technical field of oil pipes and hoops, in particular to a method for manufacturing an oil pipe, a hoop and a coupling.
Background
With the development of the petroleum industry, a large number of deep wells and ultra-deep wells appear in oil field development and production, and geological conditions and operating environments are more complex and severe, so that oil pipes are necessary operating tools for exploiting petroleum and natural gas, generally, hundreds of oil pipes are connected through threads to form a pipe column with the length of thousands of meters and are put into a shaft for oil extraction, the oil pipes are usually connected through oil pipe couplings, each oil pipe coupling is provided with a tubular coupling body, two ends of each coupling body are provided with connecting internal threads, when the oil pipes are connected through the oil pipe couplings, the oil pipes with external threads are screwed into the connecting internal threads of the oil pipe couplings, so that a petroleum continuous transportation pipeline is formed, and continuous transportation of petroleum is realized. The connection seal between the tubing coupling and the tubing in the prior art is generally that glass fiber or hemp rope is wound on the external thread of the tubing, then the tubing wound with the glass fiber or hemp rope is screwed into the tubing coupling, the sealing effect is poor, the crude oil leakage phenomenon is easy to occur in the use process, the effect is not stable, and meanwhile, the anti-corrosion effect is not achieved, so that the service life of the tubing coupling is shortened.
In summary, the present invention provides a tubing, a coupling and a method for manufacturing the coupling to solve the existing problems.
Disclosure of Invention
The invention aims to provide an oil pipe, a coupling and a manufacturing method of the coupling, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for manufacturing an oil pipe, a coupling and a coupling comprises an upper oil pipe body, wherein the bottom of the upper oil pipe body is connected with an upper flange sleeve, the upper flange sleeve is uniformly clamped and fixedly provided with an upper connecting hole, the end surface, away from the upper oil pipe body, of the upper flange sleeve is correspondingly provided with a sealing gasket, the end surface, away from the upper flange sleeve, of the sealing gasket is correspondingly provided with a lower flange sleeve, the end surface, away from the sealing gasket, of the lower flange sleeve is connected with a lower oil pipe body, the lower flange sleeve is fixedly provided with a lower connecting hole, the lower oil pipe body penetrates through the lower flange sleeve and extends into the lower flange sleeve, an external thread section is fixedly arranged on the lower oil pipe body and is positioned inside the flange sleeve, the external thread section is connected with a coupling body inside the upper flange sleeve and the lower flange sleeve, and an upper sealing ring is correspondingly arranged at the connecting position of the upper flange sleeve and the, the utility model discloses a clamp, including clamp body, lower flange dish sleeve, connecting sleeve's junction correspondence is equipped with the bottom suspension seal circle, the even fixed connecting hole of having seted up on the sealing washer, the clamp body includes connecting portion, connecting sleeve, lower connecting portion, goes up fixed seal circle, lower fixed seal circle, the fixed connecting portion that are equipped with in the inside central point of connecting sleeve position, the connecting sleeve corresponds with the junction of last connecting portion and is equipped with fixed seal circle, the fixed connecting portion that are equipped with down of opposite side of connecting sleeve's inside, connecting portion correspond with the connecting sleeve's junction down and.
Preferably, the manufacturing method of the hoop body comprises the following steps:
s1; selecting high-carbon chromium bearing steel Gcr15SiMn as a raw material and according to a thread design drawing in an oil pipe;
s2; forging and processing: processing a blank of high-carbon chromium bearing steel Gcr15SiMn, which has a shape similar to that of the clamp body;
s3; annealing: heating to 790-810 ℃ in a furnace, preserving heat for 2-6h, cooling to below 600 ℃ at the speed of 10-30 ℃/h, discharging and air cooling;
s4; turning: turning a shaft in the shape of the clamp body, and milling a groove in a cylinder in the shape of a connecting sleeve;
s5; and (3) thread machining: firstly, carrying out thread machining on the inner wall of a milling groove on a cylinder in the shape of a connecting sleeve according to a designed drawing, and carrying out thread machining on a shaft in the shape of a clamp body;
s6; for the high-carbon chromium bearing steel Gcr15SiMn, the heat treatment comprises quenching and low-temperature tempering, and the heating temperature is as follows: 820-840 (DEG C) heat preservation time is 1-2h, and cooling medium: an oil; low-temperature tempering: heating temperature: 150-180 (. degree. C.) incubation time: 2-5h, cooling mode: air cooling;
s7; and grinding, removing edges and burrs to obtain the formed clamp body.
Preferably, the sealing washer, the upper sealing ring, the lower sealing ring, the upper fixing sealing ring and the lower fixing sealing ring are made of polyurethane.
Preferably, the structure of the upper oil pipe body is the same as that of the lower oil pipe body, the internal thread arranged on the connecting sleeve is in threaded connection with the external thread section, and a phosphating coating is formed on the surface of the threaded connection section through phosphating treatment, and the thickness of the phosphating coating is not less than 15 microns.
Preferably, all be equipped with the screw thread on last connecting portion and the lower connecting portion and with the internal thread that oil pipe body and lower oil pipe body inside were equipped with correspond the setting and for threaded connection, go up the junction of connecting portion and the oil pipe body that oils, the connecting section surface department of oil pipe body all forms the bonderizing cladding material through surface phosphating treatment under the lower connecting portion, the thickness of bonderizing cladding material is not less than 15 mu m.
Preferably, the upper connecting hole and the lower connecting hole are threaded holes and are arranged corresponding to the connecting holes, and the upper connecting hole is sequentially connected with the connecting holes and the connecting holes through bolts.
Preferably, the upper flange sleeve and the lower flange sleeve are welded on the outer sides of the upper oil pipe body and the lower oil pipe body.
Preferably, the outer sides of the upper oil pipe body and the lower oil pipe body are communicated with the upper connecting part and the lower connecting part.
Preferably, the upper fixed sealing ring and the lower fixed sealing ring are fused and cast to the connecting part of the connecting sleeve and the upper connecting part and the lower connecting part by heating the outer part of the connecting sleeve. .
Preferably, the upper flange sleeve, the lower flange sleeve and the connecting sleeve are in clearance fit.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the internal thread arranged on the connecting sleeve is in threaded connection with the external thread section, and the surface of the threaded connection section is subjected to phosphating treatment to form the phosphating coating, the thickness of the phosphating coating is not less than 15 mu m, the surface of the connection section of the lower oil pipe body of the lower connecting part is subjected to surface phosphating treatment to form the phosphating coating, and the thickness of the phosphating coating is not less than 15 mu m, so that the connection part has wear resistance and corrosion resistance, and the service life is prolonged.
2. According to the invention, the hoop body is designed, and the upper flange sleeve and the lower flange sleeve are connected through the bolts, so that the oil pipes are connected for three times, the connection structure of the two oil pipes is more stable, and the normal work is ensured.
3. According to the invention, the upper sealing ring and the lower sealing ring are arranged at the joints of the connecting sleeve and the upper flange sleeve and the connecting sleeve at the joints of the lower flange sleeve and the connecting sleeve by heating the outer diameter of the sealing ring and casting the sealing ring, so that the sealing effect is better, and the phenomenon of crude oil leakage easily occurring in the use process is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the lower tubing body of the present invention;
FIG. 3 is a schematic view of the overall structure of the present invention;
FIG. 4 is a schematic view of a gasket construction of the present invention;
FIG. 5 is a schematic view of a clip body according to the present invention;
fig. 6 is a schematic cross-sectional view of the clamp body according to the present invention.
In the figure: 1-an upper oil pipe body, 2-an upper flange sleeve, 3-an upper connecting hole, 4-a sealing washer, 5-a lower flange sleeve, 6-a lower oil pipe body, 7-a lower connecting hole, 8-a threaded end, 9-a hoop body, 10-an upper sealing washer, 11-a lower sealing washer, 12-a connecting hole, 13-an upper connecting part, 14-a connecting sleeve, 15-a lower connecting part, 16-an upper fixed sealing washer and 17-a lower fixed sealing washer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
a method for manufacturing an oil pipe, a coupling and a coupling comprises an upper oil pipe body 1, wherein the bottom of the upper oil pipe body 1 is connected with an upper flange sleeve 2, the upper flange sleeve 2 is uniformly clamped and fixedly provided with upper connecting holes 3, the end surface of the upper flange sleeve 2, which is far away from the upper oil pipe body 1, is correspondingly provided with a sealing gasket 4, the end surface of the sealing gasket 4, which is far away from the upper flange sleeve 2, is correspondingly provided with a lower flange sleeve 5, the end surface of the lower flange sleeve 5, which is far away from the sealing gasket 4, is connected with a lower oil pipe body 6, the lower flange sleeve 5 is fixedly provided with a lower connecting hole 7, the lower oil pipe body 6 penetrates through the lower flange sleeve 5 and extends into the lower flange sleeve 5, an external thread section 8 is fixedly arranged on the lower oil pipe body 6 and is positioned inside the flange sleeve 5, and a coupling body 9 is connected on the external thread section 8 and inside the upper flange sleeve 2 and, go up ring flange sleeve 2 and clamp body 9's junction correspondence and be equipped with sealing washer 10, lower ring flange sleeve 5 corresponds with clamp body 9's junction and is equipped with lower sealing washer 11, evenly fixed connecting hole 12 having seted up on seal ring 4, clamp body 9 includes connecting portion 13, connecting sleeve 14, lower connecting portion 15, goes up fixed seal 16, lower fixed seal 17, connecting portion 13 is fixed to connecting sleeve 14 inside central point position, connecting sleeve 14 corresponds with the junction of last connecting portion 13 and is equipped with fixed seal 16, the fixed connecting portion 15 that is equipped with down of opposite side of connecting sleeve 14's inside, connecting portion 15 corresponds with connecting sleeve 14's junction and is equipped with lower fixed seal 17 down.
The manufacturing method of the hoop body 9 comprises the following steps:
s1; selecting high-carbon chromium bearing steel Gcr15SiMn as a raw material and according to a thread design drawing in an oil pipe;
s2; forging and processing: processing a blank of high-carbon chromium bearing steel Gcr15SiMn, which has a shape similar to that of the hoop body 9;
s3; annealing: heating to 790-810 ℃ in a furnace, preserving heat for 2-6h, cooling to below 600 ℃ at the speed of 10-30 ℃/h, discharging and air cooling;
s4; turning: turning a shaft in the shape of the clamp body 9, and milling a groove in a cylinder in the shape of the connecting sleeve 14;
s5; and (3) thread machining: firstly, carrying out thread machining on the inner wall of a milling groove on a cylinder in the shape of a connecting sleeve 14 according to a designed drawing, and carrying out thread machining on a shaft in the shape of a clamp body 9;
s6; for the high-carbon chromium bearing steel Gcr15SiMn, the heat treatment comprises quenching and low-temperature tempering, and the heating temperature is as follows: 820-840 (DEG C) heat preservation time is 1-2h of cooling medium: an oil; low-temperature tempering: heating temperature: 150-180 (. degree. C.) incubation time: 2-5h cooling mode: air cooling;
s7; and (5) grinding, trimming and deburring to obtain the formed clamp body 9.
The sealing washer 4, the upper sealing ring 10, the lower sealing ring 11, the upper fixed sealing ring 16 and the lower fixed sealing ring 17 are made of polyurethane.
Preferably, the upper oil pipe body 1 and the lower oil pipe body 6 are identical in structure, the connecting sleeve 14 is provided with internal threads which are in threaded connection with the external thread sections 8, and a phosphating coating is formed on the surfaces of the threaded connection sections through phosphating treatment, and the thickness of the phosphating coating is not less than 15 microns.
The oil pipe is characterized in that the upper connecting portion 13 and the lower connecting portion 15 are respectively provided with threads and are correspondingly arranged with the inner threads arranged inside the oil pipe body 1 and the lower oil pipe body 6, the upper connecting portion 13 is in threaded connection with the connecting portion of the oil pipe body 1, the surface of the connecting section of the lower oil pipe body 6 of the lower connecting portion 15 is subjected to surface phosphating treatment to form a phosphating coating, and the thickness of the phosphating coating is not less than 15 mu m.
The upper connecting hole 3 and the lower connecting hole 7 are threaded holes and are arranged corresponding to the connecting hole 12, and the upper connecting hole 3 is sequentially connected with the connecting hole 7 and the connecting hole 12 through bolts.
And the upper flange sleeve 2 and the lower flange sleeve 5 are welded on the outer sides of the upper oil pipe body 1 and the lower oil pipe body 6.
The outer sides of the upper oil pipe body 1 and the lower oil pipe body 6 are communicated with the upper connecting part 13 and the lower connecting part 15.
The upper fixed sealing ring 16 and the lower fixed sealing ring 17 are fused and cast to the connecting parts of the connecting sleeve 14, the upper connecting part 13 and the lower connecting part 15 by heating the outside of the connecting sleeve 14 in a fixed mode of fusing and casting the fixed sealing ring 16 and the lower fixed sealing ring 17.
The upper flange sleeve 2, the lower flange sleeve 5 and the connecting sleeve 14 are in clearance fit.
The working process of the invention is as follows: when in connection, an upper sealing ring 10 and a lower sealing ring 11 are respectively placed at the joint of an upper flange sleeve 2 and a clamp body 9, the joint of a lower flange sleeve 5 and the clamp body 9 is simultaneously placed at the joint of an upper connecting sleeve 14 and an upper connecting part 13, an upper fixing sealing ring 16 and a lower fixing sealing ring 17 are respectively placed at the joint of a connecting sleeve 14 and an upper connecting part 13, a lower fixing sealing ring 17 is correspondingly arranged at the joint of a lower connecting part 15 and the connecting sleeve 14, the clamp body 9 is turned by a tool, so that the upper connecting part 13 on the clamp body 9 is connected with the thread inside the upper oil pipe body 1, the connecting sleeve 14 and the external thread section 8 of the upper oil pipe body 1 are simultaneously connected, then the lower oil pipe body 6 is rotated by the tool to connect the inside of the lower oil pipe body 6 and the external thread section 8 with the lower connecting part 15 and the connecting sleeve 14, and the fixing sealing rings 16 and the lower fixing sealing rings 17 are fused and cast to, The connection part of the lower connection part 15 is connected with the connection hole 7 and the connection hole 12 through the upper connection hole 3 fixedly arranged on the upper flange sleeve 2, the lower flange sleeve 5 and the sealing washer 4 in turn through the upper connection hole 3 of the bolt, thereby connecting the upper oil pipe body 1 and the lower oil pipe body 6, the inner thread arranged on the connection sleeve 14 is in threaded connection with the outer thread section 8 and the phosphorized treatment is carried out on the surface of the threaded connection section to form a phosphorized coating, the thickness of the phosphorized coating is not less than 15 mu m, the surface of the connection section of the lower oil pipe body 6 of the lower connection part 15 is all treated by the surface phosphorized treatment to form the phosphorized coating, the thickness of the phosphorized coating is not less than 15 mu m, the connection part has both wear resistance and corrosion resistance, the service life is prolonged, the hoop body 9 is designed, and the upper flange sleeve 2 is connected with the lower flange, make oil pipe cubic threaded connection, make two oil pipe's connection structure more stable, and thereby guaranteed the work that can normally, through heating connecting sleeve 14 outside with fixed seal 16, lower fixed seal 17 founds connecting sleeve 14 and last connecting portion 13, the junction and the last ring flange sleeve 2 of lower connecting portion 15, lower ring flange sleeve 5 is equipped with sealing washer 10 with connecting sleeve 14 junction, lower sealing washer 11, make its sealed effect better, crude oil leakage phenomenon appears easily in having avoided the use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a tubing coupling, includes oil pipe body (1), its characterized in that: the bottom of the upper oil pipe body (1) is connected with an upper flange sleeve (2), an upper connecting hole (3) is uniformly formed in the upper flange sleeve (2), a sealing washer (4) is correspondingly arranged on the end face, far away from the upper oil pipe body (1), of the upper flange sleeve (2) of the upper flange sleeve (4), a lower flange sleeve (5) is correspondingly arranged on the end face, far away from the sealing washer (4), of the lower flange sleeve (5), a lower oil pipe body (6) is connected onto the end face, far away from the sealing washer (4), of the lower flange sleeve (5), a lower connecting hole (7) is fixedly formed in the lower flange sleeve (5), the lower oil pipe body (6) penetrates through the lower flange sleeve (5) and extends into the lower flange sleeve (5), an outer threaded section (8) is fixedly arranged on the lower oil pipe body (6) and in the flange sleeve (, the clamp is characterized in that a clamp body (9) is connected to the outer thread section (8) and inside the upper flange sleeve (2) and the lower flange sleeve (5), an upper sealing ring (10) is correspondingly arranged at the joint of the upper flange sleeve (2) and the clamp body (9), a lower sealing ring (11) is correspondingly arranged at the joint of the lower flange sleeve (5) and the clamp body (9), a connecting hole (12) is uniformly and fixedly formed in the sealing washer (4), the clamp body (9) comprises an upper connecting part (13), a connecting sleeve (14), a lower connecting part (15), an upper fixing sealing ring (16) and a lower fixing sealing ring (17), the upper connecting part (13) is fixedly arranged at the inner center position of the connecting sleeve (14), and an upper fixing sealing ring (16) is correspondingly arranged at the joint of the connecting sleeve (14) and the upper connecting part (13), a lower connecting part (15) is fixedly arranged on the other side of the inside of the connecting sleeve (14), and a lower fixed sealing ring (17) is correspondingly arranged at the connecting part of the lower connecting part (15) and the connecting sleeve (14);
the upper flange sleeve (2) and the lower flange sleeve (5) are welded on the outer sides of the upper oil pipe body (1) and the lower oil pipe body (6);
the upper flange sleeve (2), the lower flange sleeve (5) and the connecting sleeve (14) are in clearance fit;
threads are arranged on the upper connecting part (13) and the lower connecting part (15) and are in threaded connection with internal threads arranged inside the upper oil pipe body (1) and the lower oil pipe body (6), the surface of the connecting section of the upper connecting part (13) and the upper oil pipe body (1) and the surface of the connecting section of the lower oil pipe body (6) of the lower connecting part (15) are subjected to surface phosphating treatment to form a phosphating coating, and the thickness of the phosphating coating is not less than 15 mu m;
the outer sides of the upper oil pipe body (1) and the lower oil pipe body (6) are communicated with the upper connecting part (13) and the lower connecting part (15).
2. The method of claim 1, wherein the step of forming the tubing coupling comprises: the manufacturing method of the hoop body (9) comprises the following steps:
s1, selecting high-carbon chromium bearing steel Gcr15SiMn as a raw material and designing a drawing according to threads inside an oil pipe;
s2, forging: processing a blank of high-carbon chromium bearing steel Gcr15SiMn, which is similar to the shape of the hoop body (9);
cooling to below 600 ℃ at a speed of 10-30 ℃/h, discharging and air cooling; S3 annealing: heating to 790-810 ℃ in a furnace, preserving heat for 2-6h,
s4, turning: turning a shaft in the shape of the clamp body (9), and milling a groove in a cylinder in the shape of the connecting sleeve (14);
s5, thread machining: according to a designed drawing, firstly, the inner wall of a milling groove of a cylinder in the shape of a connecting sleeve (14) is subjected to thread machining, and the thread machining is performed on a shaft in the shape of a hoop body (9);
and (3) heat preservation time: 2-5h, cooling mode: air cooling; S6, for high carbon chromium bearing steel Gcr15SiMn, the heat treatment comprises quenching and low temperature tempering, the quenching heating temperature is as follows: 820-840 (DEG C) heat preservation time is 1-2h, and cooling medium: an oil; low-temperature tempering: heating temperature: 150-180 (DEG C)
And S7, grinding, trimming and deburring to obtain the formed clamp body (9).
3. The method of claim 1, wherein the step of forming the tubing coupling comprises: the sealing washer (4), the upper sealing ring (10), the lower sealing ring (11), the upper fixing sealing ring (16) and the lower fixing sealing ring (17) are made of polyurethane.
4. The method of claim 1, wherein the step of forming the tubing coupling comprises: the structure of the oil applying pipe body (1) is the same as that of the oil discharging pipe body (6), the internal thread arranged on the connecting sleeve (14) is in threaded connection with the external thread section (8), and a phosphating coating is formed on the surface of the threaded connection section through phosphating treatment, and the thickness of the phosphating coating is not less than 15 mu m.
5. The method of claim 1, wherein the step of forming the tubing coupling comprises: go up connecting hole (3), lower connecting hole (7) and correspond the setting with connecting hole (12) for the screw hole, go up connecting hole (3) and connect gradually lower connecting hole (7), connecting hole (12) through the bolt down.
6. The method of claim 1, wherein the step of forming the tubing coupling comprises: the upper fixing sealing ring (16) and the lower fixing sealing ring (17) are fused and cast in a fixing mode that the fixing sealing ring (16) and the lower fixing sealing ring (17) are fused and cast to the connecting part of the connecting sleeve (14) and the upper connecting part (13) and the lower connecting part (15) through the outside of the heating connecting sleeve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000852.3A CN109488224B (en) | 2019-01-02 | 2019-01-02 | Method for manufacturing oil pipe, coupling and coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000852.3A CN109488224B (en) | 2019-01-02 | 2019-01-02 | Method for manufacturing oil pipe, coupling and coupling |
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| Publication Number | Publication Date |
|---|---|
| CN109488224A CN109488224A (en) | 2019-03-19 |
| CN109488224B true CN109488224B (en) | 2020-07-07 |
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| CN201910000852.3A Active CN109488224B (en) | 2019-01-02 | 2019-01-02 | Method for manufacturing oil pipe, coupling and coupling |
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| CN112780194B (en) * | 2020-12-31 | 2023-07-18 | 中油国家油气钻井装备工程技术研究中心有限公司 | Ocean riser commonality conversion equipment |
| CN113107385B (en) * | 2021-05-06 | 2021-11-09 | 大庆市龙兴石油机械有限公司 | Tubing coupling |
| CN115059408A (en) * | 2022-06-15 | 2022-09-16 | 大庆市龙兴石油机械有限公司 | Multi-element co-permeation tubing coupling |
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| US20140116725A1 (en) * | 2012-11-01 | 2014-05-01 | Arnold Wollmann | Tubular Member Coupling and Lining Systems and Methods |
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| CN201738833U (en) * | 2010-08-09 | 2011-02-09 | 成都乐天塑料有限公司 | Sucker rod coupling |
| US9982814B1 (en) * | 2017-12-13 | 2018-05-29 | Kenneth J. Carstensen | Seal ring and coupling sleeve assembly |
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| CN109488224A (en) | 2019-03-19 |
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