CN208934604U - A kind of new and effective sealing insulated tubing - Google Patents

Abstract

The utility model discloses a kind of new and effective sealing insulated tubings, including inner tube, welding ring, outer tube, thermal insulation layer, internal screw thread, external screw thread, bellows component, direct machining internal thread after inner tube one end threading other end jumping-up thickeies, has many advantages, such as elastic telescopic function between direct linkage type structure, inner tube and outer tube, change the type of attachment of traditional insulated tubing processing coupling type screw thread, reduce the outer diameter of insulated tubing tubing string, the annulus space for expanding use scope and tubing string facilitates the construction of the other programs of thermal production well.Simultaneously because using elastic extension structure, product non-deformability is further improved, the danger for destroying weld bond intensity is eliminated, especially solves the disadvantage that conventional slip poor sealing effect is easy failure, greatly enhances heat insulation.

Description

A kind of new and effective sealing insulated tubing

Technical field

The utility model relates to combustion in situ heavy crude heat extraction technical field, in particular to a kind of new and effective sealing insulation oil Pipe.

Background technique

China's heavy oil resources are widely distributed, and viscous crude occupies comparable specific gravity in China's oil yield, and each oil-field thick-oil produces Amount also improves year by year, and many oil-field thick-oil oil reservoirs have entered the steam soak middle and later periods, produces at high cost, deficiency in economic performance, steam Development prospect of handling up allows of no optimist, and conversion regime is imperative.In recent years, fireflood has all been carried out in the oil fields such as triumph, Xinjiang, Liaohe River It recovers the oil and tests and obtain effect.It is obtained through practice, fire flood is that a kind of heating power for increasing substantially recovery factor of heavy oil reservoir is adopted Oil tech.It can continue to employ the remaining oil that steam soak exploitation can not exploit, potentiality are bigger, are the following heating exploitations Effective substituted technique.

Fireflood exploitation is used as a kind of new technology, and the insulated tubing inner tube for fireflood thickened oil recovery requires temperature very high, leads to Often it can reach 500 DEG C, limiting temperature is up to 1000 DEG C.This is for being previously used in the inner tube of cyclic steam stimulation working fluid most High-temperature is that 350 DEG C of insulated tubing has been unable to satisfy fireflood mining requirement.It is suitable for the insulated tubing of fireflood exploitation in China It there is no matured product of good performance less, and all sealing structure effect is poor, is easy the deficiencies of failure in the presence of being slidingly sealed.

Summary of the invention

The purpose of the utility model is to provide a kind of new and effective sealing insulated tubings, by improving the structure of junction, Heat-insulating and sealing effect is improved, it is made more to adapt to the hole condition of fireflood thermal production well.

To realize the purpose of this utility model, the utility model provides a kind of new and effective sealing insulated tubing, including Inner tube, welding ring, outer tube and thermal insulation layer, internal screw thread, external screw thread, bellows component, the wherein thermal insulation layer among inner tube and outer tube Fill aeroge；Inner tube one end threading, direct machining internal thread after other end jumping-up thickeies, is adopted between inner tube and outer tube With the retractable structure of bellows component form.

Wherein, the connection shape that inner tube and outer tube are welded into one in the female end side close to inner tube by welding ring realization Formula is welded to connect, in the work of external force respectively with inner tube and outer tube at the male end side bellows component both ends close to inner tube With lower bellows elastic telescopic.

Wherein, the bellows component includes left spacer, bellows and right spacer, wherein left spacer, right spacer respectively at Outer tube, inner tube are welded to connect, and bellows adjacent tubes are away from L1=13mm, pipe range L2=20xL1, thickness of pipe H=7mm.

Compared with prior art, the beneficial effects of the utility model are, inner tube connection have direct linkage type, inner tube and outer tube it Between by the isostructural advantage of elastic telescopic of bellows, after two inner tubes connections, because direct after inner pipe end thickening processing Screw thread is processed, the type of attachment of traditional insulated tubing processing coupling type screw thread is changed, reduces the outer diameter of insulated tubing tubing string Size expands the annulus space of use scope and tubing string, facilitates the construction of the other programs of thermal production well.Meanwhile change every The manufacturing process of hot oil pipe, improves processing efficiency, has saved processing cost；Because using elastic extension structure, product is improved Non-deformability eliminates the danger for destroying weld bond intensity, solves the disadvantage that conventional slip poor sealing effect is easy failure, greatly Big enhancing heat insulation.

Detailed description of the invention

Fig. 1 show the structural schematic diagram of the utility model；

Fig. 2 show the structural schematic diagram of the utility model bellows component；

In figure, 1- inner tube, 2- welding ring, 3- outer tube, 4- inner insulating layer, 5- internal screw thread, 6- external screw thread, 7- bellows group Part, left spacer -8, bellows -9, right spacer -10, L1- pipe is away from, L2- pipe range, the H=thickness of pipe.

Specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.

It should be noted that " connection " described herein and the word for expressing " connection ", as " being connected ", " connected " etc. had both included that a certain component is directly connected to another component, and had also included that a certain component passes through other component and another portion Part is connected.

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.

As Figure 1-Figure 2, the embodiment of the present application provides a kind of new and effective sealing insulated tubing, including inner tube 1, weldering Ring 2, outer tube 3 and thermal insulation layer 4, internal screw thread 5, external screw thread 6, bellows component 7 are connect, wherein inner tube 1 and the thermal insulation layer 4 among outer tube Fill aeroge；1 one end threading 6 of inner tube, other end jumping-up thicken after directly machining internal thread 5, interior 1 with outer tube 3 it Between use 7 form of bellows component retractable structure.

Preferably, inner tube 1 and outer tube 3 are welded into one in the female end side close to inner tube 1 by the realization of welding ring 2 Type of attachment is welded to connect with inner tube 1 and outer tube 3 respectively at 7 both ends of male end side bellows component close to inner tube 1, Bellows elastic telescopic under the effect of external force.

Preferably, the bellows component 7 includes left spacer 8, bellows 9 and right spacer 10, wherein left spacer 8, it is right every Set 10 is welded to connect respectively at outer tube 3, inner tube 1, and 9 adjacent tubes of bellows are away from L1=13mm, pipe range L2=20xL1, thickness of pipe H= 7mm。

The application insulated tubing is processed by following techniques: inner tube latus rectum, outer tube wall derusting, outer wall of inner tube derust, are interior Pipe covers one layer of aluminium foil, applies aeroge, tighten glass wool cloth, suit, set welding ring, set and welding bellows component, vacuumize, add Heat, thermal measurement require 450 degree, japanning spray mark, packaging.

In the utility model, inner tube connection has the elastic telescopic etc. for passing through bellows between direct linkage type, inner tube and outer tube The advantages of structure, after two inner tube connections, because directly processing screw thread after inner pipe end thickening processing, changes traditional insulation oil Pipe processes the type of attachment of coupling type screw thread, reduces the outer diameter of insulated tubing tubing string, expands use scope and tubing string Annulus space, facilitate the construction of the other programs of thermal production well.Meanwhile the manufacturing process of insulated tubing is changed, it improves and adds Work efficiency rate, has saved processing cost；Because using elastic extension structure, product non-deformability is improved, destruction weld bond is eliminated The danger of intensity solves the disadvantage that conventional slip poor sealing effect is easy failure, greatly enhances heat insulation.

The above is only the preferred embodiment of the utility model, it is noted that for the general of the art For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change It also should be regarded as the protection scope of the utility model into retouching.

Claims (1)

1. a kind of new and effective sealing insulated tubing, which is characterized in that including inner tube (1), welding ring (2), outer tube (3) and heat-insulated Layer (4), internal screw thread (5), external screw thread (6), bellows component (7), wherein inner tube (1) thermal insulation layer (4) intermediate with outer tube (3) is filled out Inflate gel；Inner tube (1) one end threading (6), other end jumping-up thicken after directly machining internal thread (5), inner tube (1) with The retractable structure of bellows component (7) form is used between outer tube (3), inner tube (1) and outer tube (3) are close to inner tube (1) The type of attachment being welded into one is realized by welding ring (2) in female end side, in one side wave of male end close to inner tube (1) Line tube assembly (7) both ends are welded to connect with inner tube (1) and outer tube (3) respectively, under the effect of external force bellows elastic telescopic, institute Stating bellows component (7) includes left spacer (8), bellows (9) and right spacer (10), wherein left spacer (8), right spacer (10) point It not being welded to connect with outer tube (3), inner tube (1), bellows (9) adjacent tubes are away from L1=13mm, pipe range L2=20xL1, the thickness of pipe (H)= 7mm。