CN113376030A - Testing device and method for pressure transmission evolution law of cement sheath outside oil-gas well pipe - Google Patents
Testing device and method for pressure transmission evolution law of cement sheath outside oil-gas well pipe Download PDFInfo
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- CN113376030A CN113376030A CN202110839065.5A CN202110839065A CN113376030A CN 113376030 A CN113376030 A CN 113376030A CN 202110839065 A CN202110839065 A CN 202110839065A CN 113376030 A CN113376030 A CN 113376030A
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- 239000004568 cement Substances 0.000 title claims abstract description 93
- 230000005540 biological transmission Effects 0.000 title claims abstract description 42
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 25
- 239000012530 fluid Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010835 comparative analysis Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 7
- 239000002002 slurry Substances 0.000 abstract description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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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
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
A testing device and method for the pressure transmission evolution law of a cement sheath of an oil-gas well are characterized in that the device mainly comprises: the device and the method can effectively simulate the transmission and evolution process of the cement ring outside the casing on the ground pressure of deep wells and ultra-deep wells, develop the test of the pressure transmission and evolution rule of the cement ring outside the casing under the action of different formation pressures, the external pressure/back pressure of the cement sheath casing under the action of formation pressure and the evolution rule of the external pressure/back pressure along with time, the transmission efficiency of the cement sheath outside the casing to the ground pressure, and the influence rule of the cement slurry system and the cement sheath thickness on the pressure transmission of the cement sheath outside the casing are accurately obtained, the pressure transmission characteristic and the evolution rule of the cement sheath are comprehensively reflected, and theoretical support is provided for material selection and strength design of deep well and ultra-deep well casings.
Description
Technical Field
The invention relates to the technical field of oil and gas well drilling and production engineering, in particular to a device and a method for testing the pressure transmission evolution law of a cement sheath outside an oil and gas well pipe.
Technical Field
With the continuous deepening of oil and gas exploration and development, the phenomenon of casing damage occurs sometimes due to the influence of factors such as geology, engineering, corrosion and the like, and particularly in deep wells, ultra-deep wells and large-scale fractured shale gas wells, the phenomenon seriously influences the development of oil and gas fields. If the internal pressure generated by the fracturing of the sleeve is too large, the sleeve can be burst and fail; if the external pressure from the stratum is too large, the casing can be damaged by extrusion, and the oil and gas well is scrapped due to the above accidents. Therefore, in order to prevent the casing from bursting or crushing and the failure of the integrity of the shaft caused by the bursting or crushing, particularly for deep wells and ultra-deep wells, the stress state and the mechanical behavior of the cement-containing ring casing under the service working condition must be clarified, the strength of the casing is reasonably designed, and the casing material is preferably selected.
Grout is injected into the annulus between the casing and the formation to form a cement sheath. Research shows that the cement ring plays a certain unloading/cutting and protecting role on the casing: when the casing is subjected to high internal pressure generated by fracturing, formation pressure is transmitted to the casing, and the outer wall of the casing is subjected to pressure from the formation, namely backpressure, which can improve the internal pressure resistance of the casing to a certain extent; when the casing is subjected to high external pressure from the stratum, the cement sheath has a certain unloading/cutting effect, the stratum pressure transmitted to the casing is reduced, the casing is protected to a certain extent, and the external extrusion resistance of the casing is improved. Therefore, under the condition that the design and the material selection of the casing strength are not clarified, if a high-steel-grade thick-wall casing with high price is selected, the material is excessively wasted due to the overlarge casing strength allowance; if a low-steel grade casing pipe made of a common material is selected, the casing pipe strength is often failed due to unreasonable material selection and strength design of the casing pipe. Therefore, the research on the transmission characteristic and the evolution rule of the cement ring to the ground pressure can provide an important theoretical basis for the strength design and material selection of deep wells and ultra-deep well casings in the whole life cycle.
At present, no testing device and method for simulating the pressure transmission characteristic and the evolution law of the cement sheath outside the oil-gas well pipe exist at home and abroad, and the pressure transmission characteristic and the evolution law of the cement sheath cannot be systematically evaluated. The invention provides a testing device and a testing method for a cement sheath pressure transmission evolution law, which can simulate external pressure/back pressure of different stratum pressure acting on the outer wall of a casing through a cement sheath, the evolution law of the external pressure/back pressure along with time and the transmission efficiency of the cement sheath outside the casing on the stratum pressure, can simulate the influence law of different cement slurry systems and cement sheath thicknesses on the cement sheath pressure transmission outside the casing, realize the testing of the cement sheath pressure transmission characteristic and the evolution law, and provide theoretical support for the material selection and strength design of deep wells and ultra-deep well casings. The device and the method can reduce unnecessary waste of materials and prevent the integrity failure of the shaft caused by insufficient strength of the casing.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for an external cement sheath pressure transmission evolution rule of an oil and gas well casing, which aim to solve the technical problem that the actual external cement sheath pressure transmission evolution rule of the oil and gas well casing cannot be accurately measured and the problems of casing material selection and strength design caused by the same, particularly aim at deep wells and ultra-deep wells, and simultaneously furthest reduce the testing device and the experimental cost.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a testing arrangement of oil gas well outside of tubes cement sheath pressure transfer evolution law which characterized in that mainly includes: the device comprises a pressure gauge, a liquid inlet pipeline and a valve, a lead, a sleeve, a nut, a right-angle shoulder, an upper cavity, a first conical shoulder, a lower cavity, a cement ring, a foundation, internal threads, a lower combined gasket, a liquid discharge pipeline and a valve, a pressure-bearing cavity, an upper combined gasket, a rubber sealing ring, a high-precision strain gauge, a second conical shoulder, a positioning hole, a groove and a blind hole, wherein the sleeve, the nut, the upper cavity and the lower cavity are made of metal materials; the upper cavity, the lower cavity, the sleeve with the cement ring, the nut, the upper combined washer with the sealing function, the lower combined washer and the rubber sealing ring form a pressure-bearing cavity, and the nut fixes the upper cavity on the lower cavity through the sleeve with the cement ring; the upper cavity body consists of a right-angle shoulder, a second conical shoulder, a positioning hole and a groove, wherein the width of the right-angle shoulder is greater than the thickness of the cement sheath; the lower cavity fixed on the foundation consists of a first conical shoulder and a blind hole with internal threads; the sleeve with the cement ring is fixed in the blind hole through the internal thread and the lower combined gasket, and simultaneously seals and isolates high-pressure fluid in the pressure-bearing chamber; the upper combined gasket positioned on the right-angle shoulder is used for sealing and isolating high-pressure fluid in the pressure-bearing chamber; the positioning hole and the rubber sealing ring positioned in the groove are used for performing annular packing and radial positioning on the upper section of the sleeve; the first conical shoulder and the second conical shoulder generate high contact stress under the fastening action of the nut, so that metal-metal conical sealing is realized, and the metal-metal conical sealing is used for sealing and isolating high-pressure fluid in the pressure-bearing chamber; the blind hole with the internal thread is used for axially and radially positioning the lower section of the sleeve; the high-precision strain gauge is used for dynamically testing the pressure transmission evolution rule of the pressure-bearing chamber; one end of the lead is connected with the high-precision strain gauge, and the other end of the lead is connected with the dynamic strain testing system; the pressure gauge is used for displaying the pressure of the pressure-bearing chamber; the liquid inlet pipeline and the valve are used for controlling the high-pressure fluid to be pumped into the pressure-bearing chamber, and the liquid outlet pipeline and the valve are used for controlling the pressure relief of the pressure-bearing chamber.
Compared with the prior art, the invention has the following advantages:
(1) the testing device can effectively simulate the transmission and evolution process of the cement ring outside the casing on the ground pressure of the deep well and the ultra-deep well, test the pressure transmission and evolution rule of the cement ring outside the casing under the action of different stratum pressures, accurately obtain the external pressure/back pressure and the evolution rule along with time of the cement ring casing under the action of the stratum pressure, the transmission efficiency of the cement ring outside the casing on the ground pressure, the influence rule of the cement paste system and the cement ring thickness on the pressure transmission of the cement ring outside the casing, comprehensively reflect the pressure transmission characteristic and the evolution rule of the cement ring, and provide theoretical support for the material selection and the strength design of the casing in the whole life cycle of the deep well and the ultra-deep well.
(2) The device has simple structure, convenient operation and low cost, and the test result can carry out system evaluation on the complete shaft of the deep well and the ultra-deep well in the whole life cycle.
Drawings
FIG. 1 is a schematic diagram of a testing device for the pressure transmission evolution law of an external cement sheath.
FIG. 2 is a schematic diagram of an upper chamber of the testing apparatus.
FIG. 3 is a schematic view of a lower chamber of the testing apparatus.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in the attached drawings, the invention provides a testing device for the pressure transmission evolution law of a cement sheath outside an oil-gas well pipe, which is characterized by mainly comprising: the device comprises a pressure gauge 1, a liquid inlet pipeline and valve 2, a lead 3, a sleeve 4, a nut 5, a right-angle shoulder 6, an upper cavity 7, a first conical shoulder 8, a lower cavity 9, a cement ring 10, a foundation 11, an internal thread 12, a lower combined gasket 13, a liquid discharge pipeline and valve 14, a pressure-bearing cavity 15, an upper combined gasket 16, a rubber sealing ring 17, a high-precision strain gauge 18, a second conical shoulder 19, a positioning hole 20, a groove 21 and a blind hole 22, wherein the sleeve 4, the nut 5, the upper cavity 7 and the lower cavity 9 are made of metal materials; the upper cavity 7, the lower cavity 9, the sleeve 4 with the cement ring 10, the nut 5, the upper combined washer 16 with the sealing function, the lower combined washer 13 and the rubber seal ring 17 form a pressure-bearing cavity 15, and the nut 5 fixes the upper cavity 7 on the lower cavity 9 through the sleeve 4 with the cement ring 10; the upper cavity 7 consists of a right-angle shoulder 6, a second conical shoulder 19, a positioning hole 20 and a groove 21, wherein the width of the right-angle shoulder 6 is larger than the thickness of the cement sheath 10; the lower cavity 9 fixed on the foundation 11 consists of a first conical shoulder 8 and a blind hole 22 with internal threads 12; the sleeve 4 with the cement ring 10 is fixed in the blind hole 22 through the internal thread 12 and the lower combined gasket 13, and simultaneously seals high-pressure fluid in the pressure-bearing chamber 15; an upper combined gasket 16 positioned on the right-angle shoulder 6 is used for sealing off high-pressure fluid in the pressure-bearing chamber 15; the positioning hole 20 and the rubber sealing ring 17 positioned in the groove 21 are used for performing annular packing and radial positioning on the upper section of the sleeve 4; the first conical shoulder 8 and the second conical shoulder 19 generate high contact stress under the fastening action of the nut 5, so that metal-metal conical sealing is realized, and the metal-metal conical sealing is used for sealing high-pressure fluid in the pressure-bearing chamber 15; the blind hole 22 with the internal thread 12 is used for axially and radially positioning the lower section of the sleeve 4; the high-precision strain gauge 18 is used for dynamically testing the pressure transmission evolution law of the pressure-bearing chamber 15; one end of the lead 3 is connected with the high-precision strain gauge 18, and the other end is connected with the dynamic strain testing system; the pressure gauge 1 is used for displaying the pressure of the pressure-bearing chamber 15; the liquid inlet pipeline and the valve 2 are used for controlling the high-pressure fluid to be pumped into the pressure-bearing chamber 15, and the liquid outlet pipeline and the valve 14 are used for controlling the pressure relief of the pressure-bearing chamber 15.
In order to make the objects, technical schemes and advantages of the invention clearer, the following explains a method for testing the pressure transmission evolution law of the cement sheath outside the oil and gas well pipe and a specific implementation mode thereof, which are provided by the invention, with reference to the attached drawings 1, 2 and 3, and comprises the following detailed steps:
the method comprises the following steps: preparing a sleeve 4 with a cement sheath 10, wherein the upper end of the sleeve 4 is provided with an external thread matched with the nut 5, the lower end of the sleeve 4 is provided with an external thread matched with the internal thread 12, and the middle part of the sleeve 4 is maintained to form the cement sheath 10;
step two: arranging high-precision strain gauges 18 on the inner wall of the casing 4, wherein the annular interval of the high-precision strain gauges 18 is 180 degrees, and the axial interval is 50mm, and the total number of the high-precision strain gauges is 3;
step three: fixing the sleeve 4 obtained in the step two in a blind hole 22 of a lower cavity 9 through an internal thread 12 and a lower combined gasket 13, axially and radially positioning the lower part of the sleeve 4, and simultaneously sealing high-pressure fluid in a pressure-bearing chamber 15;
step four: the upper cavity 7 is fixed on the first conical shoulder 8 of the lower cavity 9 through the nut 5, the external thread at the upper end of the sleeve 4, the rubber sealing ring 17 and the upper combined gasket 16, and high-pressure fluid in the pressure-bearing chamber 15 is sealed;
step five: one end of a lead 3 is connected with a high-precision strain gauge 18, and the other end of the lead is connected with a dynamic strain testing system;
step six: by feeding liquidThe pipeline and the valve 2 pump high-pressure fluid into the pressure-bearing chamber 15 until the simulated formation pressure P is reached1Closing the liquid inlet pipeline and the valve 2;
step seven: starting the dynamic Strain test System, recording P1Annular strain epsilon of inner wall of casing 4 under pressure1iAnd its time t1To obtain f (t)1)＝ε1i；
Step eight: according to the stress-strain constitutive relation, calculating the annular stress sigma of the inner wall of the casing1iAnd the evolution law of f (t) along with the time1)＝σ1i；
Step nine: based on the thick-walled cylinder theory and the Lame formula, the external pressure P applied to the outer wall of the casing 4 is calculated in an inversion way1iAnd the evolution law of f (t) along with the time1)＝P1i；
Step ten: comparative analysis of P at different times1iAnd simulating the formation pressure P1Obtaining the pressure transmission evolution rule of the cement ring 10 outside the casing 4;
step eleven: preparing a casing 4 with a cement sheath 10 of the same thickness again by adopting the same cement paste system, and pumping high-pressure fluid into the pressure-bearing cavity 15 through a liquid inlet pipeline and a valve 2 until the simulated formation pressure P is reached2Repeating the second step to the tenth step to obtain the simulated formation pressure P2Under the action, the pressure transmission evolution rule of the cement ring 10 outside the casing 4 is realized;
step twelve: and analogizing in sequence, adopting the same cement paste system, preparing the casing 4 with the cement sheath 10 with the same thickness again, and pumping high-pressure fluid into the pressure-bearing cavity 15 through the liquid inlet pipeline and the valve 2 until the simulated formation pressure P is reachednRepeating the second step to the tenth step to obtain the simulated formation pressure PnUnder the action, the pressure transmission evolution law of the cement sheath 10 outside the casing 4 is obtained, so that the influence law of the simulated formation pressure on the pressure transmission of the cement sheath 10 is obtained;
step thirteen: similarly, the same cement paste system is adopted, the casing 4 with the cement sheath 10 with different thicknesses is prepared again, and the second step to the tenth step are repeated, so that the influence rule of the thickness of the cement sheath on the pressure transmission of the cement sheath 10 can be obtained;
fourteen steps: similarly, different cement paste systems are adopted, the casing 4 with the cement sheath 10 with the same thickness is prepared again, and the second step to the tenth step are repeated, so that the influence rule of the cement paste systems on the pressure transmission of the cement sheath 10 can be obtained.
Claims (2)
1. The utility model provides a testing arrangement of oil gas well outside of tubes cement sheath pressure transfer evolution law which characterized in that, the device mainly includes: the high-precision strain gauge comprises a sleeve (4), a right-angle shoulder (6), an upper cavity (7), a first conical shoulder (8), a lower cavity (9), a cement ring (10), internal threads (12), a lower combined gasket (13), a pressure-bearing chamber (15), an upper combined gasket (16), a rubber sealing ring (17), a high-precision strain gauge (18), a second conical shoulder (19), a positioning hole (20), a groove (21) and a blind hole (22), wherein the sleeve (4), a nut (5), the upper cavity (7) and the lower cavity (9) are made of metal materials; the upper cavity (7), the lower cavity (9), the sleeve (4) with the cement ring (10), the nut (5), the upper combined washer (16) with the sealing function, the lower combined washer (13) and the rubber sealing ring (17) form a pressure-bearing cavity (15), and the nut (5) fixes the upper cavity (7) on the lower cavity (9) through the sleeve (4) with the cement ring (10); the upper cavity (7) consists of a right-angle shoulder (6), a second conical shoulder (19), a positioning hole (20) and a groove (21), wherein the width of the right-angle shoulder (6) is greater than the thickness of the cement sheath (10); the lower cavity (9) fixed on the foundation (11) consists of a first conical shoulder (8) and a blind hole (22) with an internal thread (12); the sleeve (4) with the cement ring (10) is fixed in the blind hole (22) through the internal thread (12) and the lower combined gasket (13), and simultaneously seals high-pressure fluid in the pressure-bearing chamber (15); the upper combined gasket (16) positioned on the right-angle shoulder (6) is used for sealing off high-pressure fluid in the pressure-bearing chamber (15); the positioning hole (20) and the rubber sealing ring (17) positioned in the groove (21) are used for performing annular packing and radial positioning on the upper section of the sleeve (4); the first conical shoulder (8) and the second conical shoulder (19) generate high contact stress under the fastening action of the nut (5), so that metal-metal conical sealing is realized, and the high-pressure fluid in the pressure-bearing chamber (15) is sealed; the blind hole (22) with the internal thread (12) is used for axially and radially positioning the lower section of the sleeve (4); the high-precision strain gauge (18) is used for dynamically testing the pressure transmission evolution rule of the pressure-bearing chamber (15); one end of the lead (3) is connected with the high-precision strain gauge (18), and the other end of the lead is connected with the dynamic strain testing system; the pressure gauge (1) is used for displaying the pressure of the pressure-bearing chamber (15); the liquid inlet pipeline and the valve (2) are used for controlling the high-pressure fluid to be pumped into the pressure-bearing chamber (15), and the liquid discharge pipeline and the valve (14) are used for controlling the pressure relief of the pressure-bearing chamber (15).
2. The method for testing the pressure transmission evolution law of the cement sheath outside the oil and gas well pipe is characterized by comprising the following steps of:
the method comprises the following steps: preparing a sleeve (4) with a cement ring (10), wherein an external thread matched with the nut (5) is processed at the upper end of the sleeve (4), an external thread matched with the internal thread (12) is processed at the lower end of the sleeve (4), and the middle part of the sleeve (4) is maintained to form the cement ring (10);
step two: arranging high-precision strain gauges (18) on the inner wall of the casing (4), wherein the annular interval of the high-precision strain gauges (18) is 180 degrees, and the axial interval is 50mm and is 3 pairs;
step three: fixing the sleeve (4) obtained in the step two in a blind hole (22) of a lower cavity (9) through an internal thread (12) and a lower combined gasket (13), axially and radially positioning the lower part of the sleeve (4), and simultaneously sealing high-pressure fluid in a pressure-bearing chamber (15);
step four: the upper cavity (7) is fixed on a first conical shoulder (8) of the lower cavity (9) through a nut (5), external threads at the upper end of the sleeve (4), a rubber sealing ring (17) and an upper combined gasket (16), and high-pressure fluid in the pressure-bearing chamber (15) is sealed;
step five: one end of a lead (3) is connected with a high-precision strain gauge (18), and the other end of the lead is connected with a dynamic strain testing system;
step six: high-pressure fluid is pumped into the pressure-bearing chamber (15) through a liquid inlet pipeline and a valve (2) until the simulated formation pressure P is reached1Closing the liquid inlet pipeline and the valve (2);
step seven: starting the dynamic Strain test System, recording P1Annular strain epsilon of inner wall of casing (4) under pressure1iAnd its time t1To obtain f (t)1)＝ε1i；
Step eight: according to the stress-strain constitutive relation, calculating the annular stress sigma of the inner wall of the casing1iAnd the evolution law of f (t) along with the time1)＝σ1i；
Step nine: based on the thick-walled cylinder theory and the Lame formula, the external pressure P applied to the outer wall of the casing (4) is calculated in an inversion way1iAnd the evolution law of f (t) along with the time1)＝P1i；
Step ten: comparative analysis of P at different times1iAnd simulating the formation pressure P1Obtaining the pressure transmission evolution rule of the cement ring (10) outside the casing (4);
step eleven: the casing (4) with the cement sheath (10) with the same thickness is prepared again by adopting the same cement paste system, and high-pressure fluid is pumped into the pressure-bearing cavity (15) through a liquid inlet pipeline and a valve (2) until the simulated formation pressure P is reached2Repeating the second step to the tenth step to obtain the simulated formation pressure P2Under the action, the pressure transmission evolution rule of the cement ring (10) outside the sleeve (4);
step twelve: analogizing in turn, adopting the same cement paste system, preparing the casing (4) with the cement sheath (10) with the same thickness again, and pumping high-pressure fluid into the pressure-bearing cavity (15) through the liquid inlet pipeline and the valve (2) until the simulated formation pressure P is reachednRepeating the second step to the tenth step to obtain the simulated formation pressure PnUnder the action, the pressure transmission evolution law of the cement sheath (10) outside the casing (4) is obtained, so that the influence law of the simulated formation pressure on the pressure transmission of the cement sheath (10) is obtained;
step thirteen: similarly, the same cement paste system is adopted, the casing (4) with the cement sheath (10) with different thicknesses is prepared again, and the second step to the tenth step are repeated, so that the influence rule of the thickness of the cement sheath on the pressure transmission of the cement sheath (10) can be obtained;
fourteen steps: and similarly, different cement paste systems are adopted, the casing (4) with the cement sheath (10) with the same thickness is prepared again, and the second step to the tenth step are repeated, so that the influence rule of the cement paste systems on the pressure transmission of the cement sheath (10) can be obtained.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414781A (en) * | 2022-01-21 | 2022-04-29 | 西南石油大学 | Device and method for testing axial stress-deformation radial distribution of cement ring at alternating temperature |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522923A (en) * | 2016-11-09 | 2017-03-22 | 中国石油大学(华东) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device |
| CN106771096A (en) * | 2016-12-09 | 2017-05-31 | 西南石油大学 | A kind of cementing concrete ring seal is every ability dynamic checkout unit and experimental technique |
| CN107167396A (en) * | 2017-07-05 | 2017-09-15 | 西南石油大学 | Evaluating apparatus and method that working solution temperature shock influences on pit shaft mechanical integrity |
| CN107421813A (en) * | 2017-05-26 | 2017-12-01 | 西南石油大学 | A kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method |
| CN215339309U (en) * | 2021-07-23 | 2021-12-28 | 西南石油大学 | Testing device for pressure transmission evolution law of cement sheath outside oil and gas well pipe |
-
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- 2021-07-23 CN CN202110839065.5A patent/CN113376030A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522923A (en) * | 2016-11-09 | 2017-03-22 | 中国石油大学(华东) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device |
| CN106771096A (en) * | 2016-12-09 | 2017-05-31 | 西南石油大学 | A kind of cementing concrete ring seal is every ability dynamic checkout unit and experimental technique |
| CN107421813A (en) * | 2017-05-26 | 2017-12-01 | 西南石油大学 | A kind of fluid pressure type analog casing confined pressure experimental rig and its confined pressure method |
| CN107167396A (en) * | 2017-07-05 | 2017-09-15 | 西南石油大学 | Evaluating apparatus and method that working solution temperature shock influences on pit shaft mechanical integrity |
| CN215339309U (en) * | 2021-07-23 | 2021-12-28 | 西南石油大学 | Testing device for pressure transmission evolution law of cement sheath outside oil and gas well pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414781A (en) * | 2022-01-21 | 2022-04-29 | 西南石油大学 | Device and method for testing axial stress-deformation radial distribution of cement ring at alternating temperature |
| CN114414781B (en) * | 2022-01-21 | 2023-06-23 | 西南石油大学 | Device and method for testing radial distribution of cement sheath axial stress-deformation at alternating temperature |
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Application publication date: 20210910 |