CN206863745U - A kind of intelligent spring-backed quill protective case - Google Patents
A kind of intelligent spring-backed quill protective case Download PDFInfo
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- CN206863745U CN206863745U CN201720499559.2U CN201720499559U CN206863745U CN 206863745 U CN206863745 U CN 206863745U CN 201720499559 U CN201720499559 U CN 201720499559U CN 206863745 U CN206863745 U CN 206863745U
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- intelligent
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- elastic layer
- protective case
- sleeve pipe
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Abstract
A kind of intelligent spring-backed quill protective case, it is included in outside of sleeve around the double-layer seal clad set, intelligent elastic layer is provided between clad, separation is supported by main body framework inside intelligent elastic layer, mixed liquor is coated between main body framework, during oil field operation, sleeve pipe internal and external temperature can change with pressure, cause sleeve pipe tympanites or squeeze and ruin, also result in and form microgap between sleeve pipe and cement stone ring, cause has channeling or oil leak, the utility model is enclosed on sleeve outer wall, will Intelligent adjustment own vol and shape when ambient pressure variations, play a part of micro chink between balancing sleeve outer wall pressure and sealing sleeve pipe and cement stone ring, intelligent elastic layer plays main pressure dissipation during pressure change；When pressure and temperature change, intelligent elastic layer automatically adjusts shape, redistributes pressure, embodies extremely excellent temperature variation resistant and becomes performance with resistance to compression, the utility model has the characteristics of simple and practical.
Description
Technical field
Petroleum casing pipe technical field is the utility model is related to, more particularly to a kind of intelligent spring-backed quill protective case.
Background technology
Petroleum casing pipe is the steel pipe for supporting oil, the gas well borehole wall, is to ensure that drilling process is carried out and whole oil after completion
The lifeline of the normal operation of well.However, cement sheath defect, bias or weak bonding can influence the bearing capacity of sleeve pipe.It is right
Relatively low in intensity, the larger mud stone of rheological characteristic, rock salt stratum, after mud stone water suction softening, the non-uniform load on stratum is more easy to influence
To casing safety.At home, Zhongyuan Oil Field, Jianghan Oil-field, Shengli Oil Field, North China Oilfield, Sichuan oilfield and Tarim Oilfield etc.
Halite layer casing collapse event all occurred, causes huge economic loss.
In drilling engineering, typically there is specific matching relationship between sleeve pipe and well, ideally cement sheath
Thickness is constant, but in practice as the change of downhole temperature and pressure, the matching relationship between sleeve pipe, cement stone ring, well
Often change, off-design operating mode.When borehole pressure reduces, cement stone ring and casing wall deformation, formed micro-
Annular space, cause has channeling passage.When downhole temperature reduces, cement stone ring and sleeve pipe volume shrinkage mass are inconsistent, can also form micro-loop
Gap, cause has channeling passage.Since cementing operation is implemented, has channeling is always just the disaster for perplexing well cementing operation
Topic.It is estimated that has channeling be present in about 25% Completion Operations.Once generation has channeling, even if spending substantial amounts of manpower and materials,
It also is difficult to repair and arrives original interlayer sealing state.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the utility model proposes a kind of intelligent spring-backed quill protective case, the guarantor
Can be according to the change of the temperature of residing working environment, pressure intelligent regulation own form and volume in the sheath course of work, this
On the one hand the automatic adjusument of kind intelligence can effectively improve the anti-interior crowded ability with critical external compressive resistance of sleeve pipe, on the other hand, also can
Micro chink between sealing sleeve pipe and cement stone ring, reduce has channeling risk, improve the matching relationship between sleeve pipe and cement stone ring.
To reach above-mentioned purpose, the scheme that the utility model uses for：
A kind of intelligent spring-backed quill protective case, it is included in outside of sleeve around the double-layer seal clad 1 set, it is described
It is provided with intelligent elastic layer 2 between clad 1, separation, main body framework is supported by main body framework inside intelligent elastic layer 2
Between be coated with mixed liquor 2-2.
Described main body framework is hollow cube 2-1a, hollow honeycomb body 2-1b or hollow cylinder 2-1c cylinders
Small lattice composition, and be coupled to each other between small lattice.
Connection is without connecting between described small lattice and small lattice.
Described intelligent elastic layer 2 is piled up for hollow small size skeleton to be formed.
Described intelligent elastic layer 2 radially after plane cutting every layer be at least coated with 5 small size skeletons.
The beneficial effects of the utility model：
The utility model can play a part of closed sleeve pipe and the effect of Behavior of Hardened Cement Paste interannular gap and protection sleeve pipe, work as water
When there is gap because of temperature, pressure change between mudstone ring and sleeve pipe, the present apparatus can be reduced by the shape that is self-regulated with filling chink
Oil leak, has channeling equivalent risk；The utility model is when bulging or big because of the strata pressure squeezing bushing of cement stone ring occurs in sleeve pipe, energy
Depressurization is enough played, so as to improve Service Life of Casing.
Brief description of the drawings
Accompanying drawing 1 is the utility model structure diagram.
Accompanying drawing 2 is that Figure 1A-A locate schematic enlarged-scale view.
Accompanying drawing 3 is mixed liquor 2-2 schematic diagrames.
Accompanying drawing 4 is the utility model elastomeric material packing element fundamental diagram.
Accompanying drawing 5 is the utility model pressure versus volume change schematic diagram.
Embodiment
Structural principle of the present utility model and operation principle are described in further detail below in conjunction with the accompanying drawings.
As shown in Fig. 1 Fig. 2 Fig. 3, a kind of intelligent spring-backed quill protective case, including clad and intelligent elastic layer.The bag
Coating is made using the resistant to elevated temperatures nitrile rubber of media-resistant, plays the primary protective effect to intelligent elastic layer；The intelligence
The mixed liquor that energy elastic layer is encapsulated nano-porous materials and liquid by main body framework is formed.Main body framework uses nitrile rubber system
Make；It is piled up by some hollow small sizes forms, and the hollow small size can be that square is cellular or cylindric；Small size
Between connection without connect：It is an entirety as main body framework that each small size skeleton, which interconnects,；Within each small size
Coating space it is separate, to ensure the failure rupture of small size without influenceing other small size functions.It is described each small
The mixed liquor of nano-porous materials and liquid is all packaged with volume；The nano-porous materials are hydrophobicity porous material, its
Most can pore diameter range control in 0.5~2nm；The liquid is water or glycerine；Packaged nano-porous materials mix with liquid
The determination method of ratio is：Effective pore volume of nano-porous materials and the ratio of liquid volume are 1:2~1:Between 4.The intelligence
Energy spring-backed quill protective case is placed between sleeve pipe and cement stone ring, during wellbore construction, is in advance coated on the protective case
Sleeve pipe periphery, protective case is run in simultaneously with sleeve pipe, then joints cement stone ring again.After cement stone ring pours, by
Squeezing action is accumulated in the deadweight of cement, will be brought into close contact between protective case and sleeve pipe wall and cement stone ring.
Intelligent elastic layer is made up of two parts：The mixed liquor main body framework of main body framework and nano-porous materials and liquid by
Multiple hollow squares are cellular or cylindric small size is formed, and are coupled to each other between small size without connecting.Main body bone
Supporting and shaping effect and the effect of the mixed liquor of cladding nano-porous materials and liquid are erected, supporting and shaping effect ensures that sleeve pipe is protected
Sheath has certain construction intensity, can be with the complete tripping in well of sleeve pipe without destroyed, cladding nano-porous materials and liquid
The effect of the mixed liquor of body refers to the mixed liquor that nano-porous materials and liquid are independently wrapped up in each small size, ensures one
Other small size functions are not influenceed after small size rupture.The mixed liquor 2-2 of the nano-porous materials of encapsulation and liquid in small size
For the major function material of intelligent elastic layer.
The mixed liquor 2-2 of nano-porous materials and liquid is encapsulated in a confined space, in a complete pressure liter
Operation principle in high and then reduction circulation is as shown in Figure 4, Figure 5.Pressurization initial stage, pressure applied than it is relatively low when, due to
The effect of surface tension, liquid cannot be introduced into inside aperture, the pressure versus volume that now whole intelligent elastic layer is externally showed
Characteristic is substantially linear, is the elastic deformation of the liquid employed in the mixed liquor of main body framework, nano-porous materials and liquid
Summation.With the increase of pressure applied, liquid can break through the surface tension effects in porous material aperture, enter porous material
Material is internal, and P-V characteristic now is that curve enters hole plateau in Fig. 5, and it is intelligent elastic layer that this, which enters hole plateau,
The first operation interval, in the section, continue to increase with pressure, liquid can endlessly enter porous material
In the middle of duct, the pressure change externally showed is very small, i.e.,：Entering hole plateau (the first workspace of intelligent elastic layer
Between), after ambient pressure increase, liquid flows into porous material duct, pressure of the intelligent elastic layer to inside sleeve, peripheral cement stone ring
Power remains unchanged.If ambient pressure continues to increase, liquid is filled up after porous material duct, and whole intelligent elastic layer is to appearance
Existing pressure volume characteristic curve recovers the larger linear growth trend of slope, is main body framework, nano-porous materials and liquid
Mixed liquor employed in liquid elastic deformation summation, this scope work model designed by the utility model
Enclose, the listed here pressure volume characteristic being pressurized after being encapsulated for one complete nano-porous materials of statement with mixed liquid
Change procedure.After reducing ambient pressure arrival certain value, because the nano-porous materials are hydrophobic material, liquid can be spontaneous
Porous material duct is flowed out, is presented as in Fig. 2 that pressure versus volume is characteristic and portals plateau, this is the intelligent elastic layer
Second operation interval.As described above, in the section (portalling plateau), with the reduction of ambient pressure, liquid can spontaneous stream
Go out porous material duct, the pressure change externally showed is also very small, i.e.,：In (the second of intelligent elastic layer that portal plateau
Operation interval), after ambient pressure reduces, liquid outflow porous material duct, intelligent elastic layer is to inside sleeve, peripheral Behavior of Hardened Cement Paste
The pressure of ring remains unchanged.In summary, enter hole plateau and to portal plateau described, i.e., the first work of intelligent elastic layer
Make section and in the second operation interval, when ambient pressure changes, what liquid can be spontaneous flows in or out porous material duct, and
The pressure change externally embodied is very small.Therefore the intelligent spring-backed quill protective case can be between balancing sleeve and cement stone ring
Pressure.When ambient temperature changes, the change that material volume expands with heat and contract with cold can be triggered so as to the change of initiation pressure
Change, in the operation interval, these pressure changes can trigger fluid to flow in or out porous material duct, so as to realize intelligence
Adjust, realize that externally embodiment pressure is constant or changes small, the anti-outer crowded and anti-internal pressure capability of raising sleeve pipe.Intelligent elastic layer volume
Automatic adjusument can then make real-time response to the fluctuation of temperature and pressure, all the time between sealing sleeve pipe and Behavior of Hardened Cement Paste interannular
Gap, prevent oil leak herein or has channeling.The independent packing skeleton structure of the protective case adds the safe operating life of the device, when
After a certain independent small size breakage or failure, remaining position of intelligent elastic layer can make a response rapidly, each encapsulation small size
Interior liquid senses pressure change, spontaneous to flow in or out porous material duct, intelligent elastic layer form adaptive regulation, pressure
Dispersed to each position of power, improve the service life of sleeve pipe at high temperature under high pressure.In addition, for different depth and differently
The mixture formula of the casing protection set of matter environment section, inside filling porous material and liquid can select respectively as the case may be
Take, Character Design.The mixed liquor of the nano-porous materials of different pore size and liquid can be packaged in different units body, can also incited somebody to action
The nano-porous materials of different pore size mix post package with liquid in same cell cube, design under two or more different pressures
Operation interval, to balance same position appearance different grades of pressure value.
Operation principle of the present utility model：
During oil field operation, sleeve pipe internal and external temperature can change with pressure, cause sleeve pipe tympanites or squeeze and ruin, also can
Cause to form microgap between sleeve pipe and cement stone ring, cause has channeling or oil leak.The utility model is enclosed on sleeve outer wall, works as ring
During the pressure change of border will Intelligent adjustment own vol and shape, play balancing sleeve outer wall pressure and sealing sleeve pipe and Behavior of Hardened Cement Paste
The effect of micro chink between ring.Clad is made using the resistant to elevated temperatures nitrile rubber of media-resistant, is played to intelligent elastic layer
Primary protective effect.Intelligent elastic layer plays main pressure dissipation during pressure change；When pressure and temperature are sent out
During changing, intelligent elastic layer automatically adjusts shape, redistributes pressure, embodies extremely excellent temperature variation resistant and becomes performance with resistance to compression.
Claims (5)
1. a kind of intelligent spring-backed quill protective case, it is characterised in that be included in outside of sleeve around the double-layer seal cladding set
Layer (1), intelligent elastic layer (2) is provided between described clad (1), is entered inside intelligent elastic layer (2) by main body framework
Row support separates, and mixed liquor (2-2) is coated between main body framework.
2. a kind of intelligent spring-backed quill protective case according to claim 1, it is characterised in that described main body framework is sky
The small lattice composition of the cube (2-1a) of the heart, hollow honeycomb body (2-1b) or hollow cylinder (2-1c), and between small lattice
It is coupled to each other.
3. a kind of intelligent spring-backed quill protective case according to claim 2, it is characterised in that described small lattice and small point
Connection is without connecting between lattice.
A kind of 4. intelligent spring-backed quill protective case according to claim 1, it is characterised in that described intelligent elastic layer
(2) pile up for hollow small size skeleton and form.
A kind of 5. intelligent spring-backed quill protective case according to claim 1, it is characterised in that described intelligent elastic layer
(2) radially after plane cutting every layer be at least coated with 5 small size skeletons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720499559.2U CN206863745U (en) | 2017-05-08 | 2017-05-08 | A kind of intelligent spring-backed quill protective case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720499559.2U CN206863745U (en) | 2017-05-08 | 2017-05-08 | A kind of intelligent spring-backed quill protective case |
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| Publication Number | Publication Date |
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| CN206863745U true CN206863745U (en) | 2018-01-09 |
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| CN201720499559.2U Active CN206863745U (en) | 2017-05-08 | 2017-05-08 | A kind of intelligent spring-backed quill protective case |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439478A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | Inner layer sleeve is the pipe in pipe casing being threadedly coupled and its assembly method |
| CN110439477A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | A kind of double combination casing of plastic mismatch |
| CN111307690A (en) * | 2020-04-13 | 2020-06-19 | 西南石油大学 | Packing performance testing device and method for annular cement ring of oil-gas well cylinder |
| CN111963165A (en) * | 2020-09-28 | 2020-11-20 | 西南石油大学 | Three-dimensional physical simulation experiment device and method for simulating dense oil reservoir development |
-
2017
- 2017-05-08 CN CN201720499559.2U patent/CN206863745U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439478A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | Inner layer sleeve is the pipe in pipe casing being threadedly coupled and its assembly method |
| CN110439477A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | A kind of double combination casing of plastic mismatch |
| CN110439477B (en) * | 2019-07-18 | 2021-09-28 | 中国石油天然气集团有限公司 | Double-layer combined sleeve with mismatched strength |
| CN111307690A (en) * | 2020-04-13 | 2020-06-19 | 西南石油大学 | Packing performance testing device and method for annular cement ring of oil-gas well cylinder |
| CN111307690B (en) * | 2020-04-13 | 2022-05-06 | 西南石油大学 | Packing performance testing device and method for annular cement ring of oil-gas well cylinder |
| CN111963165A (en) * | 2020-09-28 | 2020-11-20 | 西南石油大学 | Three-dimensional physical simulation experiment device and method for simulating dense oil reservoir development |
| CN111963165B (en) * | 2020-09-28 | 2022-02-01 | 西南石油大学 | Three-dimensional physical simulation experiment device and method for simulating dense oil reservoir development |
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