CN206554903U - Thermal production well sleeve thermal stress compensator - Google Patents

Thermal production well sleeve thermal stress compensator Download PDF

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Publication number
CN206554903U
CN206554903U CN201720001742.5U CN201720001742U CN206554903U CN 206554903 U CN206554903 U CN 206554903U CN 201720001742 U CN201720001742 U CN 201720001742U CN 206554903 U CN206554903 U CN 206554903U
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China
Prior art keywords
outer tube
central tube
tube
compensator
sleeve
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Application number
CN201720001742.5U
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Chinese (zh)
Inventor
肖华
陈芳
蒋理波
吴津
付正华
赵涛
戢能斌
罗凤芝
何飞
赵业卫
张波
侯磊
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

The utility model embodiment provides a kind of thermal production well sleeve thermal stress compensator, including:Central tube, outer tube, short sleeve and top connection, described short sleeve one end connects the top connection, the short sleeve other end and described outer tube one end are coaxially connected, the outer tube other end is slidingly sealed cooperation with the central tube, the safety pin for fixing the central tube and the outer tube is provided between the central tube and the outer tube, the locking device for limiting the central tube and the outer tube relative position is additionally provided with the inside of the outer tube, wherein, the locking device is made of heat-fusible materials.The utility model between the central tube and outer tube of compensator by being provided for the safety pin of fixed center pipe and outer tube; and be provided for limiting central tube and the hot melt locking device of outer tube relative position on the inside of outer tube; it can realize and safety pin is protected by locking device during sleeve pipe tripping in, effectively prevent safe shear pin from being cut in advance by mill resistance reason.

Description

Thermal production well sleeve thermal stress compensator
Technical field
The utility model is related to thermal production well sleeve servicing unit, more particularly to a kind of thermal production well sleeve thermal stress compensator, Belong to oil-gas field development technical field.
Background technology
In the production process of thick oil thermal extraction, the maximum reason of casing failure is exactly that sleeve pipe is born when steam injection is heated Tensile stress, compression stress is born after cooling again, causes screw thread to destroy or casing deformation, influences later stage production operation.
Sleeve compensator claims tubular type telescopic joint, is the compensation device of hot fluid pipeline, is mainly used in after rectilinear duct additionally arranges The axial thermal expansion displacement absorption compensation of appearance.Suitable for hot water, steam, grease type medium, pass through sliding sleeve compensator Sliding motion, reaches the compensation of thermal expansion.So, connection thermal stress compensator can efficiently solve casing deformation on sleeve pipe The problem of.
Routine sleeve compensator special for thermal production well principle is substantially similar at present, and central tube and outer tube are connected by mechanical shear pin Connect, in steam injection, when thermal stress is more than shear pin shearing force, shear pin is cut, and central tube and outer tube relative can be slided, compensator Start working, realize the flexible compensation of sleeve pipe.
The disadvantage that existing conventional sleeve compensator special for thermal production well is present is that shear pin shearing force is smaller, and sleeve pipe is in tripping in During may be in confused situation because of underground, cause shear pin by mill resistance reason easily cut in advance.Shear pin is cut in advance, a side Face, causes compensation distance to be taken in advance, compensating action can not be played during steam injection;On the other hand, tripping in is continued in sleeve pipe Cheng Zhong, sleeve pipe thermal compensator can not transmit moment of torsion downwards, and influence sleeve pipe continues tripping in and later stage production operation.So, it is badly in need of New casing thermal stress compensator is improved to meet the production of thick oil thermal extraction.
Utility model content
The utility model embodiment provides a kind of thermal production well sleeve thermal stress compensator, by the central tube in compensator with The safety pin of fixed center pipe and outer tube is provided between outer tube, and restriction central tube is provided for and outer on the inside of outer tube The hot melt locking device of pipe relative position, it is possible to achieve safety pin is protected by locking device during sleeve pipe tripping in, Effectively prevent safe shear pin from being cut in advance by mill resistance reason.
The thermal production well sleeve thermal stress compensator that the utility model embodiment is provided, including:Central tube, outer tube, short sleeve And top connection, described short sleeve one end connects the top connection, and the short sleeve other end and described outer tube one end are coaxially connected, The outer tube other end is slidingly sealed cooperation with the central tube, is provided between the central tube and the outer tube for fixing It is additionally provided with the inside of the safety pin of the central tube and the outer tube, the outer tube outside for limiting the central tube and being described The locking device of pipe relative position, wherein, the locking device is made of heat-fusible materials.
In the embodiment of the utility model one, above-mentioned locking device is the bushing being made of PVC plastic.
In the embodiment of the utility model one, above-mentioned short sleeve is described by coordinating joint to be connected with the outer coaxial tube Outer tube is slidingly sealed cooperation by adapter sleeve and the central tube.
In the embodiment of the utility model one, above-mentioned central tube is provided with small joint with one end that the outer tube is engaged.
In the embodiment of the utility model one, above-mentioned locking device be located at the outer tube on the inside of the small joint with it is described Between cooperation joint.
In the embodiment of the utility model one, the height being connected with the adapter sleeve is installed between above-mentioned central tube and outer tube Warm seal.
In the embodiment of the utility model one, above-mentioned high temperature seal includes big gasket ring, the graphite annulus and small being sequentially connected Gasket ring.
In the embodiment of the utility model one, above-mentioned compensator is processed using resistant material.
In the embodiment of the utility model one, above-mentioned compensator surface uses high temperature resistant chromium material coating.
Based on above-mentioned, the thermal production well sleeve thermal stress compensator that the utility model embodiment is provided, by compensator The safety pin of fixed center pipe and outer tube is provided between central tube and outer tube, and is provided on the inside of outer tube in restriction Heart pipe and the hot melt locking device of outer tube relative position, it is possible to achieve protected and pacified by locking device during sleeve pipe tripping in Full pin, effectively prevents safe shear pin from being cut in advance by mill resistance reason.
During sleeve pipe tripping in, moment of torsion can be transmitted by just turning to downhole tool.When carrying out thermal recovery after completion, heat Fusibleness locking device is raised because of oil temperature, melted by heat, and locking action disappears.In steam injection, when thermal stress is more than safety During pin shearing force, safety pin is cut, and central tube and outer tube relative can be slided, and compensator is started working, and realizes sleeve pipe Flexible compensation.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the utility model or technical scheme of the prior art The accompanying drawing used required in technology description is briefly described, it should be apparent that, drawings in the following description are this practicalities Some new embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
The thermal production well sleeve thermal stress compensator structural representation that Fig. 1 provides for the embodiment of the utility model one;
The thermal production well sleeve thermal stress compensator structural representation that Fig. 2 provides for the another embodiment of the utility model;
The thermal production well sleeve thermal stress compensator structural representation that Fig. 3 provides for the utility model another embodiment;
The sleeve pipe thermal stress compensator structural representation that Fig. 4 provides for the utility model another embodiment.
Description of reference numerals:
1:Central tube;
2:Outer tube;
3:Short sleeve;
4:Top connection;
5:Safety pin;
6:Locking device;
7:Coordinate joint;
8:Adapter sleeve;
91:Big gasket ring;
92:Graphite annulus;
93:Small gasket ring;
10:Small joint;
6’:Bushing;
8’:Pressure cap.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not paid is belonged to The scope of the utility model protection.
The sleeve pipe thermal stress compensator structural representation that Fig. 1 provides for the embodiment of the utility model one.As shown in figure 1, this The thermal production well sleeve thermal stress compensator that embodiment is provided includes:Central tube 1, outer tube 2, short sleeve 3 and top connection 4.
Wherein, described one end of short sleeve 3 connects the top connection 4, the other end of short sleeve 3 and described one end of outer tube 2 Coaxially connected, the other end of outer tube 2 is slidingly sealed cooperation with the central tube 1.Between the central tube 1 and the outer tube 2 The safety pin 5 for fixing the central tube 1 and the outer tube 2 is provided with, the inner side of outer tube 2 is additionally provided with for limiting The central tube 1 and the locking device 6 of the relative position of outer tube 2, and the locking device 6 uses heat-fusible materials to be made.
It is understood that in actual applications, the connector as compensation between sleeve pipe of top connection 4, i.e., on connect First 4 other end connection sleeve pipe or screen casing.
Exemplary, it can be connected through a screw thread, also may be used between short sleeve 3 and outer tube 2 between top connection 4 and short sleeve 3 To be connected by threaded coaxial.
The sleeve pipe thermal stress compensator that the present embodiment is provided, during sleeve pipe tripping in producing well projected depth, is used Solid state is presented in the locking device that heat-fusible materials are made, and plays the relative position of locking action, limitation central tube and outer tube, Effectively prevent safe shear pin from being cut in advance by mill resistance reason.During sleeve pipe tripping in, by safety pin by central tube with Outer tube is fixed together, and then can transmit moment of torsion by just turning to downhole tool.
When carrying out thermal recovery after completion, hot melt locking device is raised because of oil temperature, and melted by heat, locking action disappears Lose.In steam injection, when thermal stress is more than safety pin shearing force, safety pin is cut, and central tube and outer tube can be relative Slide, compensator is started working, and realizes the flexible compensation of sleeve pipe.
The sleeve pipe thermal stress compensator structural representation that Fig. 2 provides for the another embodiment of the utility model.As shown in Fig. 2 The thermal production well sleeve thermal stress compensator that the present embodiment is provided includes:Central tube 1, outer tube 2, short sleeve 3 and top connection 4.
Wherein, described one end of short sleeve 3 connects the top connection 4, the other end of short sleeve 3 and described one end of outer tube 2 Coaxially connected, the other end of outer tube 2 is slidingly sealed cooperation with the central tube 1.Between the central tube 1 and the outer tube 2 The safety pin 5 for fixing the central tube 1 and the outer tube 2 is provided with, the inner side of outer tube 2 is additionally provided with for limiting The central tube 1 and the locking device 6 of the relative position of outer tube 2, and the locking device 6 uses heat-fusible materials to be made.
Further, the present embodiment leads on the basis of embodiment illustrated in fig. 1 between the short sleeve 3 and the outer tube 2 Cross cooperation joint 7 coaxially connected, the outer tube 2 is slidingly sealed cooperation by adapter sleeve 8 and the central tube 1.
Further, as a kind of preferably embodiment, be provided between the central tube 1 and outer tube 2 with it is described tight Admittedly the high temperature seal of the connection of set 8.
As an alternative embodiment, above-mentioned high temperature seal includes big gasket ring 91, the graphite annulus 92 being sequentially connected With small gasket ring 93.
The sleeve pipe thermal stress compensator that the present embodiment is provided, during sleeve pipe tripping in producing well projected depth, is used Solid state is presented in the locking device that heat-fusible materials are made, and plays the relative position of locking action, limitation central tube and outer tube, Effectively prevent safe shear pin from being cut in advance by mill resistance reason.During sleeve pipe tripping in, by safety pin by central tube with Outer tube is fixed together, and then can transmit moment of torsion by just turning to downhole tool.
In practical application, the sleeve pipe thermal stress compensator that the present embodiment is provided is by top connection connection sleeve pipe or screen casing, After thermal production well injection high-temperature steam, compensator can absorb thermal stress, and hot melt locking device, which is melt, to be melted, what thermal stress was produced Axial thrust load cuts safety pin, and central tube and outer tube relative can be slided, and offset the mistake that sleeve pipe is produced during steam injection is handled up Carry axial stress so that thermal stress is alleviated to sleeve pipe yield limit, reach the purpose for preventing that thermal production well sleeve from damaging.
Further, high temperature seal, and connection sealing position welding, sealing material are installed between central tube and outer tube Material selects soft graphite ring, and it has intensity big, and coefficient of friction is small (0.04~0.10), and not aging, effect is good, easy to maintenance etc. Feature, ensure that the performance of the instrument high temperature high voltage resistant, and instrument compensation performance repeatedly.
It is noted that above-described embodiment can also further simplify, such as:Short sleeve is directly connected to outer barrel, in Cooperation is directly slidingly sealed between heart pipe and outer tube;Again for example:Seal, but premise need not be installed between adapter sleeve and central tube It is that sliding sealing surface has enough machining accuracies.
The sleeve pipe thermal stress compensator structural representation that Fig. 3 provides for the utility model another embodiment.As shown in figure 3, The thermal production well sleeve thermal stress compensator that the present embodiment is provided includes:Central tube 1, outer tube 2, short sleeve 3 and top connection 4.
Wherein, described one end of short sleeve 3 connects the top connection 4, the other end of short sleeve 3 and described one end of outer tube 2 Coaxially connected, the other end of outer tube 2 is slidingly sealed cooperation with the central tube 1.Between the central tube 1 and the outer tube 2 The safety pin 5 for fixing the central tube 1 and the outer tube 2 is provided with, the inner side of outer tube 2 is additionally provided with for limiting The central tube 1 and the locking device 6 of the relative position of outer tube 2, and the locking device 6 uses heat-fusible materials to be made.
Further, by coordinating joint 7 coaxially connected between the short sleeve 3 and the outer tube 2, the outer tube 2 leads to Cross adapter sleeve 8 and be slidingly sealed cooperation with the central tube 1.
Further, the present embodiment is on the basis of embodiment illustrated in fig. 2, and adapter sleeve 8 can specifically use pressure cap 8 ', lock Determine device 6 and be specifically as follows the bushing 6 ' being made of PVC plastic.
The sleeve pipe thermal stress compensator that the present embodiment is provided, during sleeve pipe tripping in producing well projected depth, is used Solid state is presented in the bushing that PVC plastic is made, and plays the relative position of locking action, limitation central tube and outer tube, effectively anti- Only safe shear pin is cut in advance by mill resistance reason.During sleeve pipe tripping in, central tube is consolidated with outer tube by safety pin It is scheduled on together, and then moment of torsion can be transmitted by just turning to downhole tool.
When carrying out thermal recovery after completion, hot melt locking device is raised because of oil temperature, and melted by heat, locking action disappears Lose.In steam injection, when thermal stress is more than safety pin shearing force, safety pin is cut, and central tube and outer tube can be relative Slide, compensator is started working, and realizes the flexible compensation of sleeve pipe.
Further, because pressure cap 8 ' and bushing 6 ' are simple in construction, easily manufacture.In actual applications, both can be with Construction requirement is met, instrument manufacturing cost can be saved again.
The sleeve pipe thermal stress compensator structural representation that Fig. 4 provides for the utility model another embodiment.As shown in figure 4, The thermal production well sleeve thermal stress compensator that the present embodiment is provided includes:Central tube 1, outer tube 2, short sleeve 3 and top connection 4.
Wherein, described one end of short sleeve 3 connects the top connection 4, the other end of short sleeve 3 and described one end of outer tube 2 Coaxially connected, the other end of outer tube 2 is slidingly sealed cooperation with the central tube 1.Between the central tube 1 and the outer tube 2 The safety pin 5 for fixing the central tube 1 and the outer tube 2 is provided with, the inner side of outer tube 2 is additionally provided with for limiting The central tube 1 and the locking device 6 of the relative position of outer tube 2, and the locking device 6 uses heat-fusible materials to be made.
Further, by coordinating joint 7 coaxially connected between the short sleeve 3 and the outer tube 2, the outer tube 2 leads to Cross adapter sleeve 8 and be slidingly sealed cooperation with the central tube 1.
Further, as a kind of preferably embodiment, be provided between the central tube 1 and outer tube 2 with it is described tight Admittedly the high temperature seal of the connection of set 8.Wherein, the high temperature seal includes big gasket ring 91, graphite annulus 92 and the pulvinulus being sequentially connected Ring 93.
Further, the present embodiment is on the basis of above-described embodiment, for convenience central tube, outer tube and highly dense sealing Assemble, as a kind of preferably embodiment, can also be provided with central tube 1 and one end that outer tube 2 is engaged small Joint 10.
Exemplary, small joint 10 can be in Taper Pipe shape.
Further, locking device 6 is located between the small joint 10 of the inner side of outer tube 2 and the cooperation joint 7.
The sleeve pipe thermal stress compensator that the present embodiment is provided, during sleeve pipe tripping in producing well projected depth, is used Solid state is presented in the bushing that PVC plastic is made, and plays the relative position of locking action, limitation central tube and outer tube, effectively anti- Only safe shear pin is cut in advance by mill resistance reason.During sleeve pipe tripping in, central tube is consolidated with outer tube by safety pin It is scheduled on together, and then moment of torsion can be transmitted by just turning to downhole tool.
When carrying out thermal recovery after completion, hot melt locking device is raised because of oil temperature, and melted by heat, locking action disappears Lose.In steam injection, when thermal stress is more than safety pin shearing force, safety pin is cut, and central tube and outer tube can be relative Slide, compensator is started working, and realizes the flexible compensation of sleeve pipe.
It is noted that as preferably embodiment in the various embodiments described above, compensator is added using resistant material Work, lifts the service life of sleeve pipe aid, and then ensure the lasting along smoothly production of whole thermal production well.
Further, because thermal production well oil temperature is higher, in order to lift the resistance to elevated temperatures of sleeve pipe aid, may be used also To use high temperature resistant chromium material coating on compensator surface.
The utility model as completion tubular column a part, with the strength character consistent with selected sleeve pipe, its internal diameter with The casing inner diameter used cooperatively is consistent, and external diameter is adapted with drilling well hole diameter, it is ensured that have the annular clearance needed for enough well cementation, with Ensure cementing quality, it has good air-tightness, it is ensured that will not be leaked in heat note, thermal recovery and well cementing process, it has Thermo-chemical stability and corrosion resistance, to ensure the service life of oil well, the utility model can also use as pre- in lifted simultaneously Other anti-casing failure technologies such as stress, to reach the purpose of integrated control casing failure.
Finally it should be noted that:Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it System;Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should Understand:It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole Technical characteristic carries out equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type.

Claims (9)

1. a kind of thermal production well sleeve thermal stress compensator, including central tube, outer tube, short sleeve and top connection, the short sleeve one The end connection top connection, the short sleeve other end and described outer tube one end are coaxially connected, the outer tube other end with it is described Central tube is slidingly sealed cooperation;Characterized in that,
The safety pin for fixing the central tube and the outer tube is provided between the central tube and the outer tube, it is described The locking device for limiting the central tube and the outer tube relative position is additionally provided with the inside of outer tube, the locking device is adopted It is made of heat-fusible materials.
2. compensator according to claim 1, it is characterised in that the short sleeve is by coordinating joint and the outer tube same Axle is connected, and the outer tube is slidingly sealed cooperation by adapter sleeve and the central tube.
3. compensator according to claim 2, it is characterised in that be provided between the central tube and outer tube with it is described tight Gu cover the high temperature seal of connection.
4. compensator according to claim 3, it is characterised in that the high temperature seal includes the big pad being sequentially connected Ring, graphite annulus and small gasket ring.
5. compensator according to claim 1, it is characterised in that one end that the central tube is engaged with the outer tube is set It is equipped with small joint.
6. compensator according to claim 5, it is characterised in that the locking device is located at described on the inside of the outer tube Between small joint and the cooperation joint.
7. compensator according to claim 1, it is characterised in that the locking device is the lining being made of PVC plastic Set.
8. compensator according to claim 1, it is characterised in that the compensator is processed using resistant material.
9. compensator according to claim 1, it is characterised in that the compensator surface is applied using high temperature resistant chromium material Layer.
CN201720001742.5U 2017-01-03 2017-01-03 Thermal production well sleeve thermal stress compensator Active CN206554903U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720001742.5U CN206554903U (en) 2017-01-03 2017-01-03 Thermal production well sleeve thermal stress compensator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720001742.5U CN206554903U (en) 2017-01-03 2017-01-03 Thermal production well sleeve thermal stress compensator

Publications (1)

Publication Number Publication Date
CN206554903U true CN206554903U (en) 2017-10-13

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Application Number Title Priority Date Filing Date
CN201720001742.5U Active CN206554903U (en) 2017-01-03 2017-01-03 Thermal production well sleeve thermal stress compensator

Country Status (1)

Country Link
CN (1) CN206554903U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109899003A (en) * 2017-11-27 2019-06-18 中石化石油工程技术服务有限公司 Hot melten type casing thermal stress autocompensation installation
CN110159210A (en) * 2019-04-25 2019-08-23 中国地质大学(武汉) A kind of wave displacement compensation device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109899003A (en) * 2017-11-27 2019-06-18 中石化石油工程技术服务有限公司 Hot melten type casing thermal stress autocompensation installation
CN110159210A (en) * 2019-04-25 2019-08-23 中国地质大学(武汉) A kind of wave displacement compensation device

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