CN213175537U - Tubing coupling assembly for thickened oil exploitation - Google Patents
Tubing coupling assembly for thickened oil exploitation Download PDFInfo
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- CN213175537U CN213175537U CN202021396416.7U CN202021396416U CN213175537U CN 213175537 U CN213175537 U CN 213175537U CN 202021396416 U CN202021396416 U CN 202021396416U CN 213175537 U CN213175537 U CN 213175537U
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Abstract
The utility model provides an oil pipe collar subassembly for viscous crude exploitation, include: the oil pipe comprises a plurality of sequentially connected sub oil pipes; the first heat-preservation and corrosion-prevention lining is arranged on the inner wall of the oil pipe; the coupling is used for connecting the adjacent sub oil pipes and comprises a coupling main body and a second heat-preservation and anti-corrosion lining arranged on the inner wall of the coupling main body; the joint main body is sleeved at the joint of the adjacent sub-oil pipes, and a sealing element is arranged between the first heat-preservation and corrosion-prevention lining and the second heat-preservation and corrosion-prevention lining in a pressing mode in the axial direction, so that the sub-oil pipes are connected in a sealing mode through the joint.
Description
Technical Field
The utility model relates to an oil gas field exploitation technical field specifically relates to a tubing coupling subassembly for viscous crude exploitation.
Background
At present, most of oil field exploitation in China enters a decline period. As the viscosity of the produced crude oil becomes higher, the freezing point becomes higher and the wax content becomes higher. When crude oil is produced, heat is dissipated along with the shallow depth of a well, and the crude oil is solidified at a position close to the well mouth to cause oil pipe blockage, so that the normal production of an oil field is seriously influenced. Further, H in crude oil2S/CO2And the content of acid gas is high, which can cause serious corrosion to the steel oil pipe and greatly shorten the service life of the oil pipe. The existing oil pipe has poor heat insulation performance and corrosion resistance, and cannot meet the heat insulation and corrosion resistance requirements of thick oil exploitation.
In addition, the oil pipes need to be connected by a coupling in actual use, the connection and heat preservation effects at the coupling of the lining pipe directly influence the connection sealing effect and heat preservation of the lining pipe, and the coupling also needs heat preservation and corrosion prevention. However, the conventional lining pipe coupling part in the prior art cannot achieve the heat preservation effect, and has poor corrosion resistance and integrity.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems, the invention aims to provide a tubing coupling component for thick oil exploitation, which is very favorable for heat preservation and corrosion prevention, enables couplings between oil pipes to be connected stably and can effectively ensure the sealing performance of the connection position.
Therefore, according to the utility model discloses, a tubing coupling subassembly for viscous crude exploitation is proposed, include: the oil pipe comprises a plurality of sequentially connected sub oil pipes; the first heat-preservation and corrosion-prevention lining is arranged on the inner wall of the oil pipe; the coupling is used for connecting the adjacent sub oil pipes and comprises a coupling main body and a second heat-preservation and anti-corrosion lining arranged on the inner wall of the coupling main body; the joint main body is sleeved at the joint of the adjacent sub-oil pipes, and a sealing element is arranged between the first heat-preservation and corrosion-prevention lining and the second heat-preservation and corrosion-prevention lining in a pressing mode in the axial direction, so that the sub-oil pipes are connected in a sealing mode through the joint.
In one embodiment, the first thermal and corrosion resistant liner comprises a tubing connection layer and a tubing medium barrier layer disposed radially inward of the tubing connection layer.
In one embodiment, a tubing foam layer is disposed between the tubing connection layer and the tubing media barrier layer.
In one embodiment, the tubing foam layer is configured to have a thickness greater than a thickness of the tubing media barrier layer.
In one embodiment, the second insulating and corrosion-resistant lining comprises a coupling connecting layer, and a coupling medium barrier layer is arranged on the radial inner side of the coupling connecting layer.
In one embodiment, a coupling foam layer is disposed between the coupling bonding layer and the coupling dielectric barrier layer.
In one embodiment, the thickness of the coupling foam layer is set to be greater than the thickness of the coupling dielectric barrier layer, and the thickness of the coupling connection layer is set to be greater than the thickness of the coupling foam layer.
In one embodiment, the connecting end of the first heat-preservation and corrosion-resistant lining is formed into a first flanging which is turned outwards in the radial direction through thermoforming, and the two ends of the second heat-preservation and corrosion-resistant lining are formed into a second flanging which is turned outwards in the radial direction through thermoforming.
In one embodiment, both ends of the coupling body axially extend to overlap with the sub-oil pipe portions to be connected correspondingly, respectively.
In one embodiment, the seal is a rubber seal.
Compared with the prior art, the utility model has the advantages of:
according to the utility model discloses an oil pipe coupling subassembly for viscous crude exploitation sets up the anticorrosive inside lining of second heat preservation in the coupling through set up the anticorrosive inside lining of first heat preservation in oil pipe to show the thermal insulation performance and the corrosion resisting property that have improved oil pipe coupling subassembly, this is favorable to viscous crude exploitation very much. The coupling between the oil pipes is connected stably, and the heat preservation and corrosion prevention performance and the sealing performance of the joint of the oil pipes and the coupling can be effectively guaranteed. In addition, the oil pipe coupling component is simple in structure, convenient to construct on site, low in cost and high in applicability.
Drawings
The present invention will be described with reference to the accompanying drawings.
Figure 1 schematically shows the structure of a tubing collar assembly for heavy oil recovery according to the present invention.
In the present application, all the figures are schematic and are only intended to illustrate the principles of the present invention and are not drawn to scale.
Detailed Description
The present invention will be described with reference to the accompanying drawings.
Fig. 1 schematically shows the structure of a tubing collar assembly 100 for heavy oil recovery according to the present invention. As shown in fig. 1, the tubing collar assembly 100 includes a tubing 10 for transporting oil. In one embodiment, tubing 10 is steel tubing. The oil pipe 10 comprises a plurality of sub oil pipes which are connected in sequence according to actual needs in actual use and then put into use. The tubing collar assembly 100 also includes a collar 30. In one embodiment, coupling 30 is a steel coupling. The sub-tubulars are connected by a collar 30.
As shown in fig. 1, a first thermal insulation anticorrosive lining 20 is provided on the inner wall of the oil pipe 10. The first corrosion resistant inner liner 20 comprises a tubing connection layer 21 and a tubing medium barrier layer 23 arranged radially inside the tubing connection layer,the oil pipe connection layer 21 is in contact connection with the inner wall surface of the oil pipe 10. During use, the transported produced crude oil in the tubing 10 is in contact with the tubing media barrier 23. The oil pipe connecting layer 21 and the oil pipe medium barrier layer 23 can effectively isolate H in crude oil2S/CO2And Cl and other corrosive media to avoid corroding the oil pipe 10, thereby improving the corrosion resistance of the oil pipe 10 and remarkably prolonging the service life of the oil pipe 10.
As shown in fig. 1, a tubing foam layer 22 is provided between the tubing tie layer 21 and the tubing dielectric barrier layer 23. The inner surface and the outer surface of the oil pipe foaming layer 22 are respectively bonded with the oil pipe medium barrier layer 23 and the oil pipe connecting layer 21. In one embodiment, the tubing foam layer 22 is a foamed plastic having a plurality of cells formed therein, and the cells are filled with air. The oil pipe connecting layer 22 can effectively improve the heat insulation performance of the oil pipe 10.
According to the utility model discloses, the thickness of oil pipe foaming layer 22 sets to be greater than the thickness of oil pipe medium barrier layer 23. Preferably, the thickness of the tubing foam layer 22 is set to 3mm and the thickness of the tubing media barrier layer 23 is set to 2 mm.
The tubing connection layer 21, the tubing foam layer 22 and the tubing dielectric barrier layer 23 are made of corrosion-resistant materials, such as polyethylene, polyurethane, and plastic such as POK (polyketone). This can significantly improve the heat insulating property and corrosion resistance of the oil pipe 10.
According to the utility model discloses, coupling 30 includes coupling main part 31. As shown in fig. 1, the coupling body 31 is configured in a cylindrical shape. And a second heat-preservation and anti-corrosion lining 40 is arranged on the inner wall of the coupling main body 31. The heat-insulating anticorrosive lining 40 comprises a coupling connecting layer 41, and the radial outer side of the coupling connecting layer 41 is in contact connection with the inner wall surface of the coupling main body 31. A coupling medium barrier layer 43 is arranged on the radial inner side of the coupling connecting layer 41. During use, the transported produced crude oil in the collar 10 contacts the collar media barrier 43. The coupling connecting layer 41 and the coupling medium barrier layer 43 can effectively isolate H in crude oil2S/CO2And Cl and other corrosive media to avoid corroding the coupling main body 31, so that the corrosion resistance of the coupling 30 is improved, and the service life of the coupling 30 is obviously prolonged.
As shown in FIG. 1, a coupling foam layer 42 is disposed between coupling bonding layer 41 and coupling dielectric barrier layer 43. The inner surface and the outer surface of the coupling foaming layer 42 are respectively bonded with the coupling medium barrier layer 43 and the coupling connecting layer 41. In one embodiment, the coupling foam layer 42 is a foam plastic having a plurality of micro-holes formed therein, and the micro-holes are filled with air. The coupling foaming layer 42 can effectively improve the heat insulation performance of the coupling 30.
The coupling connecting layer 41, the coupling foaming layer 42 and the coupling medium barrier layer 43 are formed in a three-layer co-extrusion mode, so that the heat-preservation anticorrosive layer is formed. The insulating and corrosion-resistant layer penetrates through the steel coupling body 31 in a hot extrusion mode, so that the coupling 30 is formed.
According to the utility model discloses, coupling foaming layer 42's thickness sets to the thickness that is greater than coupling medium barrier layer 43, and coupling articulamentum 41's thickness sets to the thickness that is greater than coupling foaming layer 42. Preferably, the thickness of the coupling foaming layer 22 is set to be 3mm, the thickness of the coupling medium barrier layer 23 is set to be 2mm, and the thickness of the coupling connection layer 41 is set to be 4 mm.
Similarly, the coupling connecting layer 41, the coupling foaming layer 42 and the coupling dielectric barrier layer 43 are made of corrosion-resistant materials, such as polyethylene, polyurethane, and plastic such as POK (polyketone). This can significantly improve the thermal insulation and corrosion resistance of the coupling 30.
According to the utility model discloses, the link of the anticorrosive inside lining 20 of first heat preservation forms the first turn-ups 201 that radially turns up through thermoforming to form the arc at axial tip, thereby make the tip of the oil pipe foaming layer 22 in the anticorrosive inside lining 20 of first heat preservation and oil pipe medium barrier layer 23 extend to the internal face contact with coupling main part 31. Thereby, the ends of the tubing foam layer 22 and the tubing medium barrier layer 23 are made to cover the ends of the connection ends of the tubing 10. Meanwhile, two ends of the second heat-insulating and corrosion-resistant lining 40 are both formed into second flanges 401 which are turned outwards in the radial direction through thermal forming, and the end parts at two axial ends form an arc shape. The first flanging 201 and the second flanging 401 can be effectively limited, and the overall corrosion resistance and heat insulation performance of the oil pipe and the coupling 30 are further improved.
And a sealing element 50 is arranged between the first heat-preservation and corrosion-prevention inner liner 20 and the second heat-preservation and corrosion-prevention inner liner 40 of the oil pipe 10 in the axial direction. Preferably, the sealing member 50 is a rubber sealing ring. In one embodiment, the seal 50 may be a hydrogenated nitrile rubber material. The sealing element 50 is installed between the first heat-preservation and corrosion-prevention lining 20 and the second heat-preservation and corrosion-prevention lining 40 in a pressing mode, so that sealing is formed between the first heat-preservation and corrosion-prevention lining 20 and the second heat-preservation and corrosion-prevention lining 40. Therefore, the sealing element 50 can effectively prevent corrosive media from passing through the gap between the first heat-preservation and corrosion-prevention lining 20 and the second heat-preservation and corrosion-prevention lining 40, so as to avoid corroding the steel oil pipe 10, and further improve the corrosion prevention performance of the oil pipe 10.
In order to ensure the stability and sealing performance of the coupling 30 to the sub-pipe connection, both ends of the coupling body 31 axially extend to overlap with the sub-pipe portions of the corresponding connection, respectively. The axial length of the overlapping portion between the axial end portion of one end of the coupling body 31 and the seed oil pipe is in the range of 108 mm and 115 mm. Therefore, the stability and the sealing performance of the connection of the oil pipe 10 through the coupling 30 can be effectively ensured, the integrity of the oil pipe 10 is ensured, and the heat-insulating and corrosion-preventing performance of the oil pipe 10 is further enhanced.
In the on-the-spot practical application in-process, use the utility model discloses a tubing coupling subassembly 100 for viscous crude exploitation can make the well head temperature stabilize at 52 1 ℃, compares the oil pipe among the prior art and makes the temperature of well head rise 10 ℃. Therefore, the viscosity of the crude oil is obviously reduced, the wax precipitation phenomenon of the crude oil is obviously reduced, the oil pipe blockage phenomenon is effectively avoided, and the yield increasing and consumption reducing effects are obviously enhanced.
According to the utility model discloses a tubing coupling subassembly 100 for viscous crude exploitation sets up first heat preservation anticorrosive inside lining 20 on oil pipe 10's inner wall, sets up second heat preservation anticorrosive inside lining 40 on coupling 30's inner wall to show the thermal insulation performance and the corrosion protection performance that have improved tubing coupling subassembly 100, this output increase and consumption reduction that is favorable to viscous crude exploitation very much. In addition, the coupling 40 is used for enabling the connection between the oil pipes to be stable, the overall performance of the oil pipe 10 is obviously enhanced, and the heat preservation and corrosion prevention performance and the sealing performance of the connection part of the oil pipe 10 and the coupling 30 can be effectively guaranteed. In addition, this tubing coupling subassembly 100's simple structure, the site operation of being convenient for, with low costs, the suitability is strong, can improve viscous crude exploitation efficiency greatly.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A tubing collar assembly for heavy oil recovery comprising:
the oil pipe (10) comprises a plurality of sequentially connected sub oil pipes;
a first heat-insulating and corrosion-resistant lining (20) arranged on the inner wall of the oil pipe;
a coupling (30) for connecting adjacent sub-tubulars, the coupling comprising a coupling body (31) and a second insulating and corrosion resistant liner (40) disposed on an inner wall of the coupling body;
the coupling main body is sleeved at the joint of the adjacent sub-oil pipes, and a sealing element (50) is arranged between the first heat-preservation anticorrosive lining and the second heat-preservation anticorrosive lining in a compression mode in the axial direction, so that the sub-oil pipes are connected in a sealing mode through the coupling.
2. The tubing coupling assembly of claim 1, wherein the first thermally insulating and corrosion resistant liner comprises a tubing connection layer (21) and a tubing media barrier layer (23) disposed radially inward of the tubing connection layer.
3. The tubing coupling assembly of claim 2, wherein a tubing foam layer (22) is disposed between the tubing connection layer and the tubing medium barrier layer.
4. The tubing coupling assembly of claim 3, wherein the tubing foam layer is provided with a thickness greater than a thickness of the tubing media barrier layer.
5. The tubing collar assembly of claim 1, wherein the second insulating and corrosion resistant liner comprises a collar tie layer (41) having a collar media barrier layer (43) disposed radially inward of the collar tie layer.
6. The tubing collar assembly of claim 5, wherein a coupling foam layer (42) is disposed between the coupling joint layer and the coupling media barrier layer.
7. The tubing collar assembly of claim 6, wherein the coupling foam layer is configured to have a thickness greater than a thickness of the coupling media barrier layer, and the coupling layer is configured to have a thickness greater than a thickness of the coupling foam layer.
8. The tubing collar assembly of claim 5, wherein the connecting end of the first insulating and corrosion resistant liner is thermoformed to form a first flange (201) that is radially outwardly turned, and the second insulating and corrosion resistant liner is thermoformed to form a second flange (401) that is radially outwardly turned at both ends.
9. The tubing collar assembly of claim 1, wherein both ends of the collar body each extend axially to overlap with the corresponding connected sub-tubing portion.
10. The tubing collar assembly of claim 1, wherein the seal comprises a rubber gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021396416.7U CN213175537U (en) | 2020-07-15 | 2020-07-15 | Tubing coupling assembly for thickened oil exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021396416.7U CN213175537U (en) | 2020-07-15 | 2020-07-15 | Tubing coupling assembly for thickened oil exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213175537U true CN213175537U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021396416.7U Active CN213175537U (en) | 2020-07-15 | 2020-07-15 | Tubing coupling assembly for thickened oil exploitation |
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| Country | Link |
|---|---|
| CN (1) | CN213175537U (en) |
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2020
- 2020-07-15 CN CN202021396416.7U patent/CN213175537U/en active Active
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