CN211924092U - Wear-resistant and corrosion-resistant lining for oil pipe - Google Patents

Abstract

The utility model discloses an oil pipe anticorrosive inside lining that wear-resistants, anticorrosive pipe set up in oil pipe's inside, are provided with thin steel pipe between anticorrosive pipe and the thermal-insulated pipe, and thin steel pipe cladding is on the surface of anticorrosive pipe, and the thermal-insulated pipe cladding is on the surface of thin steel pipe, anticorrosive pipe, thin steel pipe, the inside lining is constituteed jointly to the thermal-insulated pipe, the utility model discloses a thermal-insulated effect has the heat preservation, can effectively reduce crude oil and the hot water in the pit and flow the crude oil natural heat loss of well head from the shaft bottom, because the melting point ratio of wax is lower, can effectively prevent the wax deposition, the material that anticorrosive pipe adopted has anticorrosive, wear-resistant function, when anticorrosive pipe and thermal-insulated pipe cooperation are used, reduces the frictional force that oil produced when intraductal flows, has reached energy saving and emission reduction, reduces the loss of oil.

Description

Wear-resistant and corrosion-resistant lining for oil pipe

Technical Field

The utility model relates to a inside lining specifically is an oil pipe anticorrosive inside lining that wear-resistants.

Background

The oil pipe is a pipeline for transporting crude oil and natural gas from an oil-gas layer to the surface after drilling is finished, the oil pipe is used for bearing pressure generated in the process of exploitation, the lining refers to corrosion and scaling of the oil pipe, the serious problem which troubles development of the oil industry all the time is caused, striking economic loss is brought to the oil industry, a pure light pipe (without any heat insulation and preservation measures) oil extraction pipe column is generally adopted for production in the actual production process of an oil field, and the problem of great loss of the temperature of the crude oil exists in the oil extraction mode. In the anticorrosion treatment of the oil pipe, a solution that an anticorrosion coating is coated on the inner surface layer of the oil pipe is usually adopted, and the rust in the oil pipe is not easy to clean and the coating is thin, so that the problems of easy falling of an anticorrosion layer, short service life and the like exist.

The patent with the application number of CN201420423834.9 discloses a wear-resistant and corrosion-resistant lining heat-insulation oil pipe, wherein an inner pipe is fixedly embedded in an oil pipe, a heat-insulation layer is fixedly embedded between the oil pipe and the inner pipe, the wear-resistant and corrosion-resistant lining heat-insulation oil pipe is integrally formed, the length of the inner pipe is greater than that of the oil pipe, and two end faces of the inner pipe are wrapped outside the end face of the oil pipe in a protruding mode; the method can solve the problems of reducing the temperature loss of crude oil in the process of flowing from the bottom flow to the top flow of the well, improving the flow state of the crude oil in a shaft and effectively solving the technical problems of eccentric wear of a tubing string rod pipe, corrosion, scaling, wax deposition and the like in the tubing, but the technology still has certain technical defects, such as: the connection stability between inner tube and the outer tube is not enough, produces relative displacement and gap easily between the two, and hot oil can influence oil pipe's life to a certain extent if enter into this gap after. Therefore, we improve the above and provide an anti-wear and anti-corrosion lining for oil pipes.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model provides an oil pipe anticorrosion inside lining that wear-resistants.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to an oil pipe anticorrosive inside lining that wear-resistants, including anticorrosive pipe, its characterized in that, anticorrosive pipe sets up in oil pipe's inside, be provided with thermal-insulated pipe between oil pipe and the anticorrosive pipe, be provided with thin steel pipe between anticorrosive pipe and the thermal-insulated pipe, thin steel pipe cladding is on the surface of anticorrosive pipe, the thickness of thin steel pipe is 0.8mm, the cladding of thermal-insulated pipe is on the surface of thin steel pipe, anticorrosive pipe, thin steel pipe, thermal-insulated pipe constitute the inside lining jointly.

As a preferred technical scheme of the utility model, the both ends of anticorrosive pipe are provided with the turn-ups, both ends turn down rims opposite face is equipped with two spacing grooves, all be equipped with four through-holes on the turn-ups, the through-hole is the counter sink.

As the utility model discloses a preferred technical scheme, threaded hole is seted up at oil pipe's both ends, the screw hole position all with the through-hole phase-match with the size. The anti-corrosion pipe is fixed with the oil pipe through a bolt.

As an optimal technical scheme of the utility model, the both ends of thin steel pipe and thermal-insulated pipe all are equipped with the protrusion piece, the size and the spacing groove phase-match of protrusion piece, thin steel pipe and thermal-insulated pipe are spacing fixed through protrusion piece between them and the spacing groove on the anticorrosive pipe.

As a preferred technical scheme of the utility model, anticorrosive pipe divide into the three-section structure, the three-section structure is first tube head, body and second tube head respectively, through screw thread fixed connection between first tube head, body and the second tube head three, the turn-ups sets up on first tube head and second tube head.

As an optimal technical scheme of the utility model, the material that anticorrosive pipe adopted is epoxy composite anticorrosive material, and epoxy composite anticorrosive material is by vinyl 87 ~ 110 parts, glass fiber 18.1 ~ 21.4 parts, carbon fiber 1 ~ 3 parts, butadiene acrylonitrile rubber 8.1 ~ 11.8 parts, titanium white powder 1.3 ~ 3.7 parts, phthalocyanine blue 0.4 ~ 2 parts, zinc chrome yellow 1.7 ~ 4.3 parts, graphite 10 ~ 30 parts mix and form, the thickness of anticorrosive pipe is 4 mm.

As an optimized technical scheme of the utility model, the material that thermal-insulated pipe adopted is polypropylene composite, polypropylene composite is by polypropylene 100 parts, modified hollow glass bead 1-30 parts, four beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid 0.1-1 parts, pentaerythritol ester 0.1-1 parts, tris (2, 4-di-tert-butylphenyl) phosphite 0.05-2 parts, butadiene styrene rubber 0-10 parts mixes and forms, the thickness of thermal-insulated pipe is 2.5 mm.

The utility model has the advantages that: the heat insulation pipe has the functions of heat preservation and heat insulation, the natural heat loss of crude oil flowing from a well bottom to a well mouth by underground crude oil and hot water can be effectively reduced, the crude oil temperature of the well mouth is improved, the wax can be effectively prevented from being precipitated due to the low melting point of the wax, the thin steel pipe has the protection effect on the heat insulation pipe due to the high hardness, the material adopted by the corrosion prevention pipe has the functions of corrosion prevention and wear resistance, when the corrosion prevention pipe and the heat insulation pipe are used in a matched mode, the friction force generated when the oil flows in the pipe is reduced, energy conservation and emission reduction are achieved, the loss of the oil pipe in the using process is reduced, and the condition that the lining is unstable in the oil pipe can be effectively solved by adopting the bolt for fixing between the corrosion prevention pipe and the oil pipe.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

FIG. 1 is a schematic cross-sectional view of an anti-wear and anti-corrosion lining for an oil pipe of the present invention;

FIG. 2 is a schematic cross-sectional view of the wear-resistant and corrosion-resistant lining of the oil pipe of the present invention;

FIG. 3 is a schematic view of an anti-corrosion tube structure of an anti-wear and anti-corrosion lining for an oil tube of the present invention;

FIG. 4 is a schematic view of an exploded structure of an anti-corrosion pipe of the anti-wear and anti-corrosion lining of the oil pipe of the present invention;

FIG. 5 is an enlarged schematic view of the structure A of the wear-resistant and corrosion-resistant lining for oil pipe of the present invention;

fig. 6 is an enlarged schematic structural view of B of the wear-resistant and corrosion-resistant lining for oil pipe of the present invention.

In the figure: 1. an oil pipe; 2. an anticorrosion pipe; 21. a first tube head; 22. a pipe body; 23. a second tube head; 24. flanging; 3. a thin steel pipe; 4. a heat insulating pipe; 5. a liner; 6. a limiting groove; 7. a threaded hole; 8. and (4) bolts.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the utility model relates to an oil pipe anti-wear and anti-corrosion lining, including anticorrosive pipe 2, anticorrosive pipe 2 sets up in oil pipe 1's inside, be provided with heat insulating tube 4 between oil pipe 1 and the anticorrosive pipe 2, be provided with thin steel pipe 3 between anticorrosive pipe 2 and the heat insulating tube 4, thin steel pipe 3 cladding is on the surface of anticorrosive pipe 2, the thickness of thin steel pipe 3 is 0.8mm, heat insulating tube 4 cladding is on the surface of thin steel pipe 3, anticorrosive pipe 2, thin steel pipe 3, heat insulating tube 4 constitutes inside lining 5 jointly, through the thin steel pipe 3 that is equipped with, because the hardness ratio is got to the steel is bigger, can play the guard action to heat insulating tube 4.

Wherein, the both ends of anticorrosive pipe 2 are provided with turn-ups 24, and the opposite face of the turn-ups 24 at both ends is equipped with two spacing grooves 6, all is equipped with four through-holes on the turn-ups 24, and the through-hole is the counter bore, and through the spacing groove 6 that is equipped with, spacing groove 6 has limiting displacement, makes thin steel pipe 3 and thermal-insulated pipe 4 can not remove between anticorrosive pipe 2 and oil pipe 1.

Wherein, threaded hole is seted up at the both ends of oil pipe 1, and threaded hole position and size all match with the through-hole. Anticorrosive pipe 2 passes through bolt 8 with oil pipe 1 and fixes, and through being equipped with bolt 8, bolt 8 combines to have the fixed action with the screw hole, can prevent that anticorrosive pipe 2 from taking place to rock in oil pipe 1

Wherein, the both ends of thin steel pipe 3 and thermal-insulated pipe 4 all are equipped with the bulge piece, the size and the spacing groove 6 phase-match of bulge piece, and thin steel pipe 3 and thermal-insulated pipe 4 are spacing fixed through bulge piece between them and spacing groove 6 on the anticorrosive pipe 2, through bulge piece and spacing groove 6, connect and to make thin steel pipe 3 and thermal-insulated pipe 4 be connected more stably with anticorrosive pipe 2.

Wherein, anticorrosive pipe 2 divide into three-section structure, and three-section structure is first tube head 21, body 22 and second tube head 23 respectively, and through screw thread fixed connection between first tube head 21, body 22 and the 23 three of second tube head, turn-ups 24 sets up on first tube head 21 and second tube head 23, through detachable construction, makes anticorrosive pipe 2 better simple with oil pipe 1's equipment. The utility of the device is reflected.

The anticorrosion pipe 2 is made of an epoxy composite anticorrosion material, the epoxy composite anticorrosion material is formed by mixing 87-110 parts of vinyl resin, 18.1-21.4 parts of glass fiber, 1-3 parts of carbon fiber, 8.1-11.8 parts of nitrile rubber, 1.3-3.7 parts of titanium dioxide, 0.4-2 parts of phthalocyanine blue, 1.7-4.3 parts of zinc chrome yellow and 10-30 parts of graphite, the thickness of the anticorrosion pipe 2 is 4mm, the anticorrosion material is free of hanging flow during construction, can be naturally leveled, can effectively protect a metal surface, and is excellent in acid resistance, alkali resistance and salt resistance and good in heat resistance.

The heat insulation pipe 4 is made of a polypropylene composite material, the polypropylene composite material is formed by mixing 100 parts of polypropylene, 1-30 parts of modified hollow glass beads, 0.1-1 part of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 0.1-1 part of pentaerythritol ester, 0.05-2 parts of tris (2, 4-di-tert-butylphenyl) phosphite and 0-10 parts of styrene butadiene rubber, the thickness of the heat insulation pipe 4 is 2.5mm, and the polypropylene composite material can effectively reduce natural heat loss of crude oil and hot water flowing from a well bottom to a well top and improve the temperature of the crude oil at the well top.

When the oil pipe is in operation, the lining 5 is arranged inside the oil pipe 1, the lining 5 and the oil pipe 1 are fixed through the bolt 8, the installation is completed, when the oil pipe is used, when the oil flows in the pipe, the heat insulation pipe 4 of the lining 5 plays a role in heat preservation and heat insulation for the oil, the corrosion-resistant pipe 2 is made of materials, the effects of no hanging flow, excellent acid resistance, alkali resistance and salt performance and good heat resistance can be achieved, the heat insulation pipe 4 has the functions of heat preservation and heat insulation, the natural heat loss of crude oil flowing from a well bottom to a well top from underground crude oil and hot water can be effectively reduced, the temperature of the well top crude oil is improved, wax deposition can be effectively prevented due to lower melting point of the wax, the thin steel pipe 3 has a larger hardness and can play a role in protecting the heat insulation pipe 4, and the corrosion-resistant pipe 2 is made of materials which are adopted by the corrosion-resistant pipe 2 and has the functions of, The anti-wear function reduces the friction force generated when oil flows in the pipe when the anti-corrosion pipe 2 and the heat insulation pipe 4 are used in a matched mode, achieves the purposes of energy conservation and emission reduction, reduces the loss of the oil pipe 1 in the using process, and can effectively solve the problem that the lining 5 is unstable in the oil pipe 1 by fixing the anti-corrosion pipe 2 and the oil pipe 1 through the bolt 8.

Finally, it should be noted that: 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 embodiments, or 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 (5)

1. The utility model provides an oil pipe anticorrosion lining that wear-resistants, includes anticorrosive pipe (2), its characterized in that, anticorrosive pipe (2) set up the inside in oil pipe (1), be provided with between oil pipe (1) and anticorrosive pipe (2) thermal-insulated pipe (4), be provided with thin steel pipe (3) between anticorrosive pipe (2) surplus thermal-insulated pipe (4), thin steel pipe (3) cladding is on the surface of anticorrosive pipe (2), the thickness of thin steel pipe (3) is 0.8mm, thermal-insulated pipe (4) cladding is on the surface of thin steel pipe (3), inside lining (5) are constituteed jointly to anticorrosive pipe (2), thin steel pipe (3), thermal-insulated pipe (4).

2. The wear-resistant and corrosion-resistant lining for the oil pipe as claimed in claim 1, wherein flanges (24) are arranged at two ends of the corrosion-resistant pipe (2), two limiting grooves (6) are arranged on opposite surfaces of the flanges (24) at the two ends, four through holes are arranged on each flange (24), and the through holes are all countersunk holes.

3. The wear-resistant and corrosion-resistant lining for the oil pipe as claimed in claim 1, wherein threaded holes are formed in two ends of the oil pipe (1), the positions and the sizes of the threaded holes are matched with those of the through holes, and the corrosion-resistant pipe (2) and the oil pipe (1) are fixed through bolts (8).

4. The anti-wear and anti-corrosion lining for the oil pipe as claimed in claim 1, wherein two ends of the thin steel pipe (3) and the heat insulation pipe (4) are respectively provided with a protruding block, the size of the protruding blocks is matched with that of the limiting groove (6), and the thin steel pipe (3) and the heat insulation pipe (4) are limited and fixed with the limiting groove (6) on the anti-corrosion pipe (2) through the protruding blocks of the thin steel pipe and the heat insulation pipe.

5. The wear-resistant and corrosion-resistant inner liner for the oil pipe as claimed in claim 2, wherein the corrosion-resistant pipe (2) is divided into three sections of structures, the three sections of structures are a first pipe head (21), a pipe body (22) and a second pipe head (23), the first pipe head (21), the pipe body (22) and the second pipe head (23) are fixedly connected through threads, and the flanging (24) is arranged on the first pipe head (21) and the second pipe head (23).

Images