CN102392607B - Continuous heat insulating oil pipe and manufacturing method thereof - Google Patents

Continuous heat insulating oil pipe and manufacturing method thereof Download PDF

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Publication number
CN102392607B
CN102392607B CN201110214652.1A CN201110214652A CN102392607B CN 102392607 B CN102392607 B CN 102392607B CN 201110214652 A CN201110214652 A CN 201110214652A CN 102392607 B CN102392607 B CN 102392607B
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CN
China
Prior art keywords
tube
pipe
heat insulating
oil pipe
insulating oil
Prior art date
Application number
CN201110214652.1A
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Chinese (zh)
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CN102392607A (en
Inventor
毕宗岳
鲜林云
张锦刚
李博锋
余晗
任永峰
张晓峰
张万鹏
Original Assignee
宝鸡石油钢管有限责任公司
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Priority to CN201110214652.1A priority Critical patent/CN102392607B/en
Publication of CN102392607A publication Critical patent/CN102392607A/en
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Publication of CN102392607B publication Critical patent/CN102392607B/en

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Abstract

The invention discloses a continuous heat insulating oil pipe and a manufacturing method thereof. The continuous heat insulating oil pipe comprises an inner pipe (1), an outer pipe (2) and a heat insulating and heat preserving layer (3), wherein both the inner pipe (1) and the outer pipe (2) are entire continuous oil pipes; a heat reflecting and heat insulating coating (4) is sprayed on the outer wall of the inner pipe (1), and is coated with the heat insulating and heat preserving layer (3); the outer pipe (2) is sleeved on the inner pipe (1), and can be wound on a winding drum III (7); positioning rings (5) are uniformly distributed on the outer wall of the inner pipe (1); the two ports of the outer pipe (2) are welded and sealed with the outer walls of the two ports of the inner pipe (1) respectively; and an annular space (6) is formed between the inner pipe (1) and the outer pipe (2). During operation, threaded connection is not required, so that the service life of the heat insulating oil pipe is prolonged, the operating efficiency is increased, and higher economic benefit is created.

Description

A kind of continuous heat insulating oil pipe and manufacture method thereof
Technical field
The invention belongs to oil extraction in oil field technical field, be specifically related to continuous heat insulating oil pipe and manufacture method thereof that a kind of joint length exceedes 61m.
Background technology
In oil exploitation, generally need to inject to down-hole the water vapour of 300 DEG C of left and right for the larger viscous crude of viscosity, through the stewing well of high temperature, make to recover the oil again after viscosity of thickened oil reduction.Insulated tubing is an important equipment in heat extraction by steam injection process, and its structure is at the annular space filling heat insulator of double-deck concentric tube or the heat-proof string of inert gas.Conventional insulated tubing is made up of outer tube, inner tube, heat-barrier material, box cupling, sealing ring etc., and joint length is 9m-10m, when operation, all adopts and is threaded.The insulated tubing being threaded connection is complex operation not only rising, in lower process, and duty cycle is longer.The more important thing is the impact of being held the factors such as corrosion-vulnerable by the insulated tubing being threaded in operation, lost efficacy in junction; And be threaded in the rear thread of going into the well for several times and can be subject to mechanical damage in various degree, impact handling, thus have a strong impact on operating efficiency.
Summary of the invention
The object of the invention is to overcome conventional insulated tubing and adopt the shortcoming being threaded, provide a kind of homogeneous tube yield strength to be greater than 552MPa, tensile strength is greater than overlength continuous heat insulating oil pipe and the manufacture method thereof of 620MPa, when operation without being threaded, improve application life and the operating efficiency of insulated tubing, thereby created higher economic benefit.
Technical solution of the present invention: a kind of continuous heat insulating oil pipe, comprise inner tube, outer tube and insulating, described inner and outer tubes are whole coiled tubing, and on the outer wall of inner tube, are coated with heat-reflecting heat-insulating coating, in heat-reflecting heat-insulating coating, are enclosed with insulating; Described outer tube sleeve dress is on inner pipe and can be wrapped in reel III upper, and uniform locating ring on outer wall of inner tube, and the two-port that makes outer tube respectively with the two-port outer wall welded seal of inner tube, make to form annular space between inner tube and outer tube.
Described annular space is vacuum.
Length >=the 61m of described inner and outer tubes, yield strength >=552MPa, tensile strength >=620MPa.
Described insulating is entwined by several layers of aluminium foil, and between aluminium foil layer, is filled with efficient getter.
On the outer wall of described inner tube, at interval of 500-600mm, a locating ring is installed, and on the cylindrical of locating ring, ball is installed.
A manufacture method for continuous heat insulating oil pipe, is characterized in that described method comprises the steps:
A, inner and outer tubes all adopt the coiled tubing with certain heat resistance;
B, the outer wall of the inner tube discharging from reel is carried out after shot peening, on-line spray one deck heat-reflecting heat-insulating coating on the outer wall of inner tube, and in heat-reflecting heat-insulating coating, wrap up online insulating, then, at interval of 500-600mm, locating ring is installed;
C, the inwall of outer tube is carried out to shot peening, and adopt pneumatic process reeve within the outer tube;
D, by penetrating outer tube by step B inner tube after treatment under the traction of wire rope, realize the suit of inner and outer pipes;
E, one end enlarging processing to the inner tube being set with, make the port outer wall of inner tube be close to the port inner wall of outer tube, then by the port inner wall welded seal of the port outer wall of inner tube and outer tube; Then at the other end of inner tube, inner tube is applied to pulling force, and under prestressing force condition, adopt same method to carry out welded seal to the other end of inner tube, make to form annular space between inner tube and outer tube.
F, the surface of outer tube is carried out being wound on reel III after preservative treatment.
In described step C, first outer tube is wrapped in successively to two reel I and reel II side by side upper, and the inwall of outer tube is carried out to shot peening, then adopt pneumatic process reeve within the outer tube; Then aspirating hole is bored at the linkage section place between two free ends and the two winding drum of outer tube.
On the cylindrical of described locating ring, ball is installed.
Further, the linkage section place between two free ends and the two winding drum of outer tube is all drilled with the aspirating hole of 3-5 Φ 8mm, interval 1000mm, and the aspirating hole of outermost end is at least apart from the port 50mm of outer tube.
Further, by aspirating hole, annular space is vacuumized to processing, after vacuum reaches requirement, aspirating hole is carried out to the stifled weldering of vacuum, and it is smooth to block up plumb joint reconditioning.
The advantage that the present invention has and effect:
1, continuous heat insulating oil pipe of the present invention adopts coiled tubing to make, and when operation, without being threaded, having increased substantially application life and the operating efficiency of insulated tubing, thereby can create higher economic benefit.
2, when continuous heat insulating oil pipe operation of the present invention without being threaded, the loss of connectivity issue of thoroughly having avoided the loss of strength that caused by nipple and having caused because of corrosion.
3, continuous heat insulating oil pipe of the present invention is wrapped on reel, is more convenient to transport.
4, the manufacture method of continuous heat insulating oil pipe of the present invention is simple, and production efficiency is high, and the product of producing can reach prestressing force insulated tubing standard-required completely.
Brief description of the drawings
Fig. 1 is the structural representation of continuous heat insulating oil pipe of the present invention,
Fig. 2 is the cross section structure sectional view of continuous heat insulating oil pipe of the present invention,
Fig. 3 is the end structure sectional view of continuous heat insulating oil pipe of the present invention,
Fig. 4 is the manufacture method schematic diagram of continuous heat insulating oil pipe of the present invention.
Detailed description of the invention
1,2,3,4 a kind of embodiment of the present invention is described by reference to the accompanying drawings.
A kind of continuous heat insulating oil pipe, comprises inner tube 1, outer tube 2 and insulating 3.Described inner tube 1 and outer tube 2 are whole coiled tubing, and on the outer wall of inner tube 1, are coated with heat-reflecting heat-insulating coating 4, are enclosed with insulating 3 in heat-reflecting heat-insulating coating 4; Described outer tube 2 is sleeved in inner tube 1 and can be wrapped on reel III 7, and at interval of 500-600mm, a locating ring 5 is installed on inner tube 1 outer wall, and ball 11 is installed on the cylindrical of locating ring 5, and the two-port inwall that makes outer tube 2 respectively with the two-port outer wall welded seal of inner tube 1, make to form annular space 6 between inner tube 1 and outer tube 2.
Described annular space 6 is vacuum.The length of described inner tube 1 and outer tube 2 is 61-3000m, yield strength >=552MPa, tensile strength >=620MPa.Described insulating 3 is entwined by six layers of aluminium foil, and between aluminium foil layer, is filled with efficient getter.
A manufacture method for continuous heat insulating oil pipe, comprises the steps:
A, inner tube 1 and outer tube 2 all adopt the CT80 level coiled tubing with certain heat resistance; Length is 400m;
B, the outer wall of the inner tube 1 discharging from reel is carried out after shot peening, on-line spray one deck heat-reflecting heat-insulating coating 4 on the outer wall of inner tube 1, after treating that coating is stable, online parcel insulating 3 in heat-reflecting heat-insulating coating 4, then, at interval of 500-600mm, locating ring 5 is installed, and ball 11 is installed on the cylindrical of locating ring 5, be conducive to the suit of inner and outer pipes;
C, outer tube 2 is wrapped on two reel I 8 and reel II 9 side by side successively, and the inwall of outer tube 2 is carried out to shot peening, draw and adopt pneumatic process at the interior reeve of outer tube 2 by compressed air; Then the linkage section place between two free ends and the two winding drum of outer tube 2 is all drilled with the aspirating hole 10 of 3-5 Φ 8mm, interval 1000mm, and the aspirating hole 10 of outermost end, at least apart from the port 50mm of outer tube 2, ensures not affect the welded seal between inner and outer pipes port;
D, by penetrating under the traction of wire rope in above-mentioned outer tube 2 by step B inner tube 1 after treatment, realize the suit of inner and outer pipes;
E, one end enlarging processing to the inner tube 1 being set with, make the port outer wall of inner tube 1 be close to the port inner wall of outer tube 2, then by the port inner wall welded seal of the port outer wall of inner tube 1 and outer tube 2; Then at the other end of inner tube 1, inner tube 1 is applied to pulling force, and under prestressing force condition, adopt same method to carry out welded seal to the other end of inner tube 1, make to form annular space 6 between inner tube 1 and outer tube 2;
F, by aspirating hole 10, annular space 6 is vacuumized to processing, reach after requiring below 10Pa aspirating hole 10 is carried out to the stifled weldering of vacuum in vacuum, and it is smooth to block up plumb joint reconditioning;
G, will all be wrapped on reel I 8 through above-mentioned pipe after treatment, and carry out apparent heat conductivity detection, require more than apparent heat conductivity reaches C level;
H, will from reel I 8, progressively discharge through above-mentioned pipe after treatment, and and the surface of outer tube 2 be carried out all rewinding on reel II 9 after preservative treatment.
The material of inner tube 1 of the present invention and outer tube 2 is the low-carbon micro steel-alloy with certain temperature capacity through TMCP PROCESS FOR TREATMENT, the manufacturing process of described inner tube 1 and outer tube 2: steel band slitting → steel band docking → steel strip coiling → HFW technique welding → intermediate frequency annealing → coiled tubing batches.
Adopt the continuous heat insulating oil pipe length of said method manufacture to reach 400m, more than apparent heat conductivity reaches C level, meet prestressing force insulated tubing requirement (standard No.: SY/T5324-1994) completely through testing its mechanical property, its specification and mechanical property are as following table:

Claims (5)

1. a manufacture method for continuous heat insulating oil pipe, is characterized in that described method comprises the steps:
A, inner tube (1) and outer tube (2) all adopt the coiled tubing with certain heat resistance;
B, the outer wall of the inner tube discharging from reel (1) is carried out after shot peening, on-line spray one deck heat-reflecting heat-insulating coating (4) on the outer wall of inner tube (1), and at the upper online parcel insulating of heat-reflecting heat-insulating coating (4) (3), then, at interval of 500-600mm, locating ring (5) is installed;
C, the inwall of outer tube (2) is carried out to shot peening, and adopt pneumatic process reeve in outer tube (2);
D, will under the traction of wire rope, penetrate outer tube (2) by step B inner tube after treatment (1), realize the suit of inner and outer pipes;
E, one end enlarging processing to the inner tube being set with (1), make the port outer wall of inner tube (1) be close to the port inner wall of outer tube (2), then by the port inner wall welded seal of the port outer wall of inner tube (1) and outer tube (2); Then at the other end of inner tube (1), inner tube (1) is applied to pulling force, and under prestressing force condition, adopt same method to carry out welded seal to the other end of inner tube (1), make to form annular space (6) between inner tube (1) and outer tube (2);
F, the surface of outer tube (2) is carried out being wound on the first reel after preservative treatment.
2. the manufacture method of continuous heat insulating oil pipe according to claim 1, is characterized in that: ball (11) is installed on the cylindrical of described locating ring (5).
3. the manufacture method of continuous heat insulating oil pipe according to claim 1, it is characterized in that: in described step C, first outer tube (2) is wrapped in successively on two the second reels and triple barrel side by side, and the inwall of outer tube (2) is carried out to shot peening, then adopt pneumatic process reeve in outer tube (2); Then aspirating hole (10) is bored at the linkage section place between two free ends and the two winding drum of outer tube (2).
4. the manufacture method of continuous heat insulating oil pipe according to claim 3, it is characterized in that: the linkage section place between two free ends and the two winding drum of outer tube (2) is all drilled with the aspirating hole (10) of 3-5 Φ 8mm, interval 1000mm, and the aspirating hole of outermost end (10) is at least apart from the port 50mm of outer tube (2).
5. according to the manufacture method of the continuous heat insulating oil pipe described in claim 3 or 4, it is characterized in that: by aspirating hole (10), annular space (6) is vacuumized to processing, after vacuum reaches requirement, aspirating hole (10) is carried out to the stifled weldering of vacuum, and it is smooth to block up plumb joint reconditioning.
CN201110214652.1A 2011-07-22 2011-07-22 Continuous heat insulating oil pipe and manufacturing method thereof CN102392607B (en)

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Application Number Priority Date Filing Date Title
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CN102392607B true CN102392607B (en) 2014-12-03

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CN103883263A (en) * 2014-04-23 2014-06-25 中国石油大学(北京) Aerogel composite heat insulation sleeve
CN105275406B (en) * 2014-06-19 2017-12-26 中国石油化工股份有限公司 Heat-insulated completion system and heat-insulated completion method
CN104120982B (en) * 2014-07-25 2015-07-01 潘立平 Seal thermal-insulation expansion nipple
CN105201416A (en) * 2015-09-08 2015-12-30 宝鸡石油钢管有限责任公司 Titanium alloy heat-insulation oil pipe and producing method thereof
CN108515313A (en) * 2018-03-13 2018-09-11 杰森能源技术有限公司 A kind of Concentric Coiled Tubing on-line continuous preparation method
CN109630033A (en) * 2018-11-20 2019-04-16 山东美生热能科技有限公司 Long-life insulated tubing and its manufacturing method
CN109653686A (en) * 2018-11-20 2019-04-19 山东美生热能科技有限公司 Long-life insulated tubing and its manufacturing method with resistance hydrogen impregnation coating
CN109630034A (en) * 2018-11-20 2019-04-16 山东美生热能科技有限公司 Insulated tubing and its manufacturing method with resistance hydrogen impregnation coating
CN111287672A (en) * 2020-04-16 2020-06-16 东北石油大学 Heat exchange and heat insulation sleeve for exploiting terrestrial heat by utilizing waste oil well

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