CN107421813A - A kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method - Google Patents
A kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method Download PDFInfo
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- CN107421813A CN107421813A CN201710385080.0A CN201710385080A CN107421813A CN 107421813 A CN107421813 A CN 107421813A CN 201710385080 A CN201710385080 A CN 201710385080A CN 107421813 A CN107421813 A CN 107421813A
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- pressure
- kettle
- sleeve pipe
- autoclave body
- stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method.The device is mainly made up of autoclave body 2, sleeve pipe 5, cement sheath 6, rubber sleeve 8, double semicircle cylinder sleeves 9, air to kettle interface 11, thermocouple 14, water inlet and Stress control interface 15, gas drive liquid booster pump 19, water inlet 22 and pressure monitor system.This method includes：（1）Cement mortar is injected by grouting port；（2）Carry out cement sheath maintenance；（3）Water is pumped into autoclave body, pressure is radially passed to sleeve pipe, ess-strain piece collection signal, the strain of computer drawing casing stress and the relation curve of time by liquid by rubber sleeve and cement sheath；（4）Obtain that cement sheath is broken or time point and the stress value of sleeve pipe unstable failure from relation curve；（5）Relief valve and air are opened to kettle valve, takes out well cementation model.The present invention can simulate true ground environment, and experimental result is intuitively accurate, be the safe and efficient production based theoretical of Oil/gas Well.
Description
Technical field
The present invention relates to analog casing confined pressure experimental rig during the oil gas well cementing operation of petroleum natural gas exploration field
And its confined pressure method, more particularly to a kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method.
Background technology
Sleeve pipe is widely used in oil gas well cementing operation and completion, ensures that wellbore stability and drilling well are smoothed out, and forms oil gas flowing
Passage.In oil gas well operations, the non-stress in uniform way and complicated completion mode that can face plastic creep stratum cause
High Pressure Difference and alternate stress effect.Under the conditions of complicated pit shaft, production casing failure is increasing, has a strong impact on oil well operation
Life-span.Further study the mechanical behavior of cement sheath and production casing under the conditions of complicated pit shaft, develop can analog casing enclose
The experimental rig and confined pressure method of pressure, turn into the task of top priority.
Sleeve pipe confined pressure mainly carries out numerical simulation by softwares such as ANSYS, ABAQUS, because geometrical model generally changes essence
The problems such as degree, boundary condition, constitutive model matching, causes analog result and actual conditions not to be inconsistent.
At present, the equipment of analog casing confined pressure is usually mechanical device（A kind of mechanical analog casing confined pressure experimental rig
And its confined pressure method, publication number：CN105606455A）, due to can not true simulation equably stress, formation temperature and ground
Layer plasticity, therefore process of the cement mortar with temperate zone swaging into cement sheath in down-hole annular can not be simulated, it can not more simulate cement
It is cementing between ring and sleeve pipe and cement sheath and stratum, cause experimental result to equally exist larger difference with underground actual conditions.
The content of the invention
It is an object of the invention to provide a kind of fluid pressure type analog casing confined pressure experimental rig, the principle of device is reliable, behaviour
Make simplicity, true ground environment can be simulated, experimental result is intuitively accurate, can preferably meet to study needs, overcomes existing
There are the defects of technology and deficiency, there are wide market prospects.
Another object of the present invention also resides in the method for providing and analog casing confined pressure experiment being carried out using said apparatus, the party
Method can simulate process of the cement mortar with temperate zone swaging into cement sheath in down-hole annular, be established for the safe and efficient production of Oil/gas Well
Theoretical foundation.
To reach above technical purpose, the present invention uses following technical scheme.
A kind of fluid pressure type analog casing confined pressure experimental rig, mainly by autoclave body, sleeve pipe, cement sheath, rubber sleeve, double half
Circle cylinder sleeve, air to kettle interface, thermocouple, water inlet and Stress control interface, gas drive liquid booster pump, pressure release pump, water inlet, go out
The mouth of a river and pressure monitor system composition, there is kettle cover the autoclave body upper end, for the water under high pressure in sealing autoclave body, bottom
Groove is provided with, is sleeve pipe, cement sheath, rubber sleeve and double semicircle cylinder sleeves respectively from inside to outside inside autoclave body, double semicircles
Cylinder sleeve is between rubber sleeve and autoclave body inwall.
Described sleeve pipe has lid and sleeve pipe lower cover on sleeve pipe, covers and is connected through a screw thread in kettle cover on sleeve pipe, for sealing
Sleeve pipe and cement sheath upper surface, grouting port is covered with sleeve pipe, the space between the grouting port and sleeve outer wall and rubber sleeve connects
It is logical, the space between cement mortar sprue bushing outer wall and rubber sleeve, maintenance are formed by cement sheath by grouting port；Sleeve pipe lower cover is embedding
In in the groove of autoclave body bottom.
The rubber sleeve is located between cement sheath and double semicircle cylinder sleeves, for sealing and simulated formation plasticity.
Double semicircle cylinder sleeves are between rubber sleeve and autoclave body inwall, for sealing and maintenance cement sheath with pressure.
The pressure monitor system includes multiple ess-strain pieces（It can be 4）, stress-strain gage and computer, it is described
Ess-strain piece is uniformly attached in the middle part of sleeve pipe on inwall, for the signal for gathering stress suffered by sleeve pipe and straining, and will
It is transferred to stress-strain gage and computer.
The autoclave body connects thermocouple, and autoclave body outer wall connects provided with air to kettle interface and water inlet and Stress control
Mouthful, autoclave body connects air to kettle valve and compressed air inlet by air to kettle interface, is connect by water inlet and Stress control
Mouth connection pressure gauge, confined pressure stop valve and water inlet, pass through magnetic valve and gas drive liquid between compressed air inlet and water inlet
Booster pump connects.
The water inlet is used to provide driving water to gas drive liquid booster pump, and gas drive liquid booster pump is used for compressed air
The air pressure of import changes into the pump pressure that goes out of water, and the magnetic valve is used for the air pressure for controlling compressed air inlet, from
And the pump pressure that goes out of gas drive liquid booster pump is controlled, the confined pressure stop valve is used to prevent gas drive liquid booster pump from continuing to high pressure
Pressurising in kettle.
The autoclave body also connects relief valve, pressure release pump and delivery port by water inlet and Stress control interface.
The relief valve is used for pressure in venting autoclave body, and pressure release pump is used to control pressure in autoclave body, delivery port
For discharging water in autoclave body, when pressure exceedes the early warning pressure that pressure release pump is set in autoclave body, pressure release pump is by venting
Part kettle pressure is to ensure experiment safety.
Compared with prior art, the invention has the advantages that：
（1）Fluid pressure type analog casing confined pressure experimental rig can simulated formation temperature, uniform crustal stress, temperature control and pressure control
System reaches automation；
（2）Fluid pressure type analog casing confined pressure experimental rig can simulate cement mortar in down-hole annular band temperate zone swaging into cement sheath
Process；
（3）Fluid pressure type analog casing confined pressure experimental rig being capable of simulated formation plasticity；
（4）Fluid pressure type analog casing confined pressure experimental rig can simulate the glue between cement sheath and sleeve pipe and cement sheath and stratum
Knot；
（5）Fluid pressure type analog casing confined pressure experimental rig can control pressure in autoclave body, when pressure exceedes in autoclave body
During the early warning pressure that pressure release pump is set, pressure release pump is by venting part kettle pressure to ensure experiment safety.
Brief description of the drawings
Fig. 1 is a kind of structural representation of fluid pressure type analog casing confined pressure experimental rig.
In figure：1- kettle covers, 2- autoclave bodies, lid, 4- grouting ports, 5- sleeve pipes, 6- cement sheaths, 7- ess-strains on 3- sleeve pipes
The double semicircle cylinder sleeves of piece, 8- rubber sleeves, 9-, 10- sleeve pipes lower cover, 11- air to kettle interface, 12- air to kettle valve, 13- compressions are empty
Gas import, 14- thermocouples, 15- water inlets and Stress control interface, 16- pressure gauges, 17- confined pressures stop valve, 18- magnetic valves, 19-
Gas drive liquid booster pump, 20- relief valves, 21- pressure releases pump, 22- water inlets, 23- delivery ports, 24- stress-strain gages, 25- are calculated
Machine.
Embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
Referring to Fig. 1.
A kind of fluid pressure type analog casing confined pressure experimental rig, mainly by autoclave body 2, sleeve pipe 5, cement sheath 6, rubber sleeve 8,
Double semicircle cylinder sleeves 9, air to kettle interface 11, thermocouple 14, water inlet and Stress control interface 15, gas drive liquid booster pump 19, enter
The mouth of a river 22 and pressure monitor system composition.There is a kettle cover 1 upper end of autoclave body 2, and bottom is provided with groove, inside autoclave body by
In outwards be sleeve pipe 5, cement sheath 6, rubber sleeve 8 and double semicircle cylinder sleeves 9 respectively, double semicircle cylinder sleeves are located at rubber sleeve and high pressure
Between inner wall of kettle；Described sleeve pipe 5 has lid 3 and a sleeve pipe lower cover 10 on sleeve pipe, and lid 3 is connected through a screw thread embedded in kettle cover 1 on sleeve pipe
It is interior, grouting port 4 is covered with sleeve pipe, the grouting port connects with the space between sleeve outer wall and rubber sleeve, and sleeve pipe lower cover 10 is embedding
In in the groove of autoclave body bottom；The pressure monitor system includes multiple ess-strain pieces 7, stress-strain gage 24 and calculated
Machine 25；The autoclave body 2 connects thermocouple 14, and autoclave body outer wall is provided with air to kettle interface 11 and water inlet and Stress control
Interface 15, autoclave body 2 connect air to kettle valve 12 and compressed air inlet 13 by air to kettle interface 11, by water inlet and
Stress control interface 15 connects pressure gauge 16, confined pressure stop valve 17 and water inlet 22, leads between compressed air inlet and water inlet
Cross magnetic valve 18 and gas drive liquid booster pump 19 connects.
The autoclave body 2 also connects relief valve 20, pressure release pump 21 and delivery port by water inlet and Stress control interface 15
23, with the security of ensuring equipment.
The method that analog casing confined pressure experiment is carried out using said apparatus, is comprised the following steps successively：
（1）Slip casting：The cement mortar prepared is injected by grouting port；
（2）Cement sheath conserves：Water inlet is opened, kettle enters full water, by gas drive liquid booster pump to being pressurized to maintenance in kettle
Pressure, thermostatic control after curing temperature is warming up to by thermocouple, pressure jointly controls stable supporting by booster pump and pressure release pump
Pressure is protected, carries out cement sheath maintenance；
（3）Confined pressure is simulated：Water is pumped into autoclave body by gas drive liquid booster pump, liquid will by rubber sleeve and cement sheath
Pressure radially passes to sleeve pipe, and ess-strain piece collection ess-strain signal is delivered to stress-strain gage, passes through ess-strain
Ess-strain signal is changed and passes to computer by instrument, the strain of computer drawing casing stress and the relation curve of time；
（4）Interpretation of result：If bust occurs for casing stress strain value, illustrate that cement sheath has crushed or sleeve pipe unstability, thus
It can obtain that cement sheath is broken or time point and the stress of sleeve pipe unstable failure from casing stress strain and the relation curve of time
Value；
（5）After the completion of experiment, relief valve release pressure is opened, air to kettle valve is opened and introduces compressed air by water emptying, outward winding
Kettle cover takes out well cementation model.
Claims (3)
- A kind of 1. fluid pressure type analog casing confined pressure experimental rig, mainly by autoclave body（2）, sleeve pipe（5）, cement sheath（6）, rubber Set（8）, double semicircle cylinder sleeves（9）, air to kettle interface（11）, thermocouple（14）, water inlet and Stress control interface（15）, gas drive liquid Body booster pump（19）, water inlet（22）Formed with pressure monitor system, it is characterised in that the autoclave body（2）There is kettle upper end Lid（1）, bottom is provided with groove, is sleeve pipe respectively from inside to outside inside autoclave body（5）, cement sheath（6）, rubber sleeve（8）With it is double Semicircle cylinder sleeve（9）, double semicircle cylinder sleeves are between rubber sleeve and autoclave body inwall；Described sleeve pipe（5）Have and covered on sleeve pipe （3）With sleeve pipe lower cover（10）, cover on sleeve pipe（3）It is connected through a screw thread and is embedded in kettle cover（1）It is interior, grouting port is covered with sleeve pipe（4）, The grouting port connects with the space between sleeve outer wall and rubber sleeve, sleeve pipe lower cover（10）Groove embedded in autoclave body bottom It is interior；The pressure monitor system includes ess-strain piece（7）, stress-strain gage（24）And computer（25）；The autoclave body （2）Connect thermocouple（14）, autoclave body outer wall is provided with air to kettle interface（11）With water inlet and Stress control interface（15）, it is high Press kettle（2）Pass through air to kettle interface（11）Air is connected to kettle valve（12）And compressed air inlet（13）, by water inlet and Stress control interface（15）Connect pressure gauge（16）, confined pressure stop valve（17）And water inlet（22）, compressed air inlet and water inlet Pass through magnetic valve between mouthful（18）With gas drive liquid booster pump（19）Connection.
- 2. fluid pressure type analog casing confined pressure experimental rig as claimed in claim 1, it is characterised in that the autoclave body（2） Pass through water inlet and Stress control interface（15）Connect relief valve（20）, pressure release pump（21）And delivery port（23）.
- 3. carrying out the method for analog casing confined pressure experiment using the device described in claim 1 or 2, comprise the following steps successively：（1）The cement mortar prepared is injected by grouting port；（2）Water inlet is opened, kettle enters full water, by gas drive liquid booster pump to maintenance pressure is pressurized in kettle, passes through heat Galvanic couple is warming up to thermostatic control after curing temperature, and pressure is jointly controlled stable in maintenance pressure, progress by booster pump and pressure release pump Cement sheath conserves；（3）Water is pumped into autoclave body by gas drive liquid booster pump, liquid is by rubber sleeve and cement sheath by pressure along footpath To sleeve pipe is passed to, ess-strain piece collection ess-strain signal is delivered to stress-strain gage, by stress-strain gage by stress Strain signal is changed and passes to computer, the strain of computer drawing casing stress and the relation curve of time；（4）Broken cement sheath or the time point of sleeve pipe unstable failure are obtained from the relation curve of casing stress strain and time and are answered Force value；（5）After the completion of experiment, relief valve release pressure is opened, air to kettle valve is opened and introduces compressed air by water emptying, outward winding Kettle cover takes out well cementation model.
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| CN201710385080.0A CN107421813A (en) | 2017-05-26 | 2017-05-26 | A kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method |
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| CN201710385080.0A CN107421813A (en) | 2017-05-26 | 2017-05-26 | A kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580371A (en) * | 2018-12-17 | 2019-04-05 | 江西汇丰管业有限公司 | The detection device and detection method of bellows anti-pressure ability |
| CN111006951A (en) * | 2019-11-14 | 2020-04-14 | 湖南大学 | Indoor grouting test device and simulated grouting test method |
| CN111044382A (en) * | 2019-12-30 | 2020-04-21 | 西南石油大学 | Experimental device for hydraulically simulating non-uniform confining pressure of casing and using method |
| CN111287731A (en) * | 2019-12-18 | 2020-06-16 | 大庆石油管理局有限公司 | Device and method for evaluating integrity of well cementation cement sheath |
| CN111766166A (en) * | 2020-07-17 | 2020-10-13 | 西南石油大学 | Device and method for measuring integrity of casing damaged by alternating internal pressure of casing |
| CN112832743A (en) * | 2021-01-15 | 2021-05-25 | 西南石油大学 | Rapid-measurement type cement sheath integrity experimental device and evaluation method |
| CN113376030A (en) * | 2021-07-23 | 2021-09-10 | 西南石油大学 | Testing device and method for pressure transmission evolution law of cement sheath outside oil-gas well pipe |
| CN114002416A (en) * | 2021-10-29 | 2022-02-01 | 常州大学 | Cement paste expansion and shrinkage testing device under confining pressure and water curing conditions |
| CN115266307A (en) * | 2022-08-04 | 2022-11-01 | 西南石油大学 | Test device for testing erosion of high-temperature and high-pressure oil well pipe with cement sheath |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580371A (en) * | 2018-12-17 | 2019-04-05 | 江西汇丰管业有限公司 | The detection device and detection method of bellows anti-pressure ability |
| CN111006951A (en) * | 2019-11-14 | 2020-04-14 | 湖南大学 | Indoor grouting test device and simulated grouting test method |
| CN111287731A (en) * | 2019-12-18 | 2020-06-16 | 大庆石油管理局有限公司 | Device and method for evaluating integrity of well cementation cement sheath |
| CN111044382A (en) * | 2019-12-30 | 2020-04-21 | 西南石油大学 | Experimental device for hydraulically simulating non-uniform confining pressure of casing and using method |
| CN111044382B (en) * | 2019-12-30 | 2024-03-22 | 西南石油大学 | Experimental device for hydraulic type simulation of non-uniform confining pressure of sleeve and use method |
| CN111766166A (en) * | 2020-07-17 | 2020-10-13 | 西南石油大学 | Device and method for measuring integrity of casing damaged by alternating internal pressure of casing |
| CN111766166B (en) * | 2020-07-17 | 2024-03-22 | 西南石油大学 | Device and method for measuring integrity of cement sheath damaged by alternating internal pressure of sleeve |
| CN112832743A (en) * | 2021-01-15 | 2021-05-25 | 西南石油大学 | Rapid-measurement type cement sheath integrity experimental device and evaluation method |
| CN113376030A (en) * | 2021-07-23 | 2021-09-10 | 西南石油大学 | Testing device and method for pressure transmission evolution law of cement sheath outside oil-gas well pipe |
| CN114002416A (en) * | 2021-10-29 | 2022-02-01 | 常州大学 | Cement paste expansion and shrinkage testing device under confining pressure and water curing conditions |
| CN115266307A (en) * | 2022-08-04 | 2022-11-01 | 西南石油大学 | Test device for testing erosion of high-temperature and high-pressure oil well pipe with cement sheath |
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Application publication date: 20171201 |