CN112459747A - Control method of pressure-limiting and regulating valve for pressure-controlled drilling based on cubic spline curve - Google Patents
Control method of pressure-limiting and regulating valve for pressure-controlled drilling based on cubic spline curve Download PDFInfo
- Publication number
- CN112459747A CN112459747A CN202011446239.3A CN202011446239A CN112459747A CN 112459747 A CN112459747 A CN 112459747A CN 202011446239 A CN202011446239 A CN 202011446239A CN 112459747 A CN112459747 A CN 112459747A
- Authority
- CN
- China
- Prior art keywords
- pressure
- phase
- throttle valve
- model
- multiphase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 13
- 239000012071 phase Substances 0.000 claims description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 239000012530 fluid Substances 0.000 claims description 36
- 239000007791 liquid phase Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 230000001052 transient effect Effects 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 3
- 230000005574 cross-species transmission Effects 0.000 claims description 3
- 230000005514 two-phase flow Effects 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/16—Control means therefor being outside the borehole
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of control methods for pressure-limiting and regulating valves of pressure-limiting and regulating wells, in particular to a control method for pressure-limiting and regulating valves of pressure-limiting and regulating wells based on cubic spline curves. After the control method disclosed by the invention is used for controlling the opening of the throttle valve, the effect of limiting the back pressure fluctuation can be achieved, the back pressure control of the pressure control drilling wellhead is stable, the problems of overflow and well leakage of a narrow density window possibly caused by the overshoot of the throttle valve can be avoided, the drilling complexity is reduced, and the pressure control of a shaft is more refined.
Description
Technical Field
The invention relates to the technical field of control methods of pressure limiting and regulating valves of pressure-controlled drilling, in particular to a control method of a pressure limiting and regulating valve of pressure-controlled drilling based on a cubic spline curve.
Background
Along with exploration and development of exploratory wells and ultra-deep wells, the condition of extremely narrow density windows in the drilling process frequently occurs, the problem of drilling the wells in the deep wells and the ultra-deep wells through the narrow density windows is well solved through the pressure-controlled drilling technology, however, the problem of overshoot of a throttle valve at the wellhead of the pressure-controlled drilling is the key problem of stable pressure control, at present, the pressure control at home and abroad is only limited to steady-state back pressure, the problem of water hammer caused by back pressure overshoot is not considered, and particularly, the problem of overshoot of gas-liquid flow and throttle valves in the gas overflow process is not in the way of people.
The regulation of the well mouth throttle valve for the pressure-controlled drilling is a key technology for providing underbalance and pressure-controlled drilling back pressure control, and the requirement of pressure limitation in the process of regulating the well mouth target back pressure is met by combining the well mouth target back pressure, so that the safe drilling of an oil-gas well is guaranteed. At present, the throttle valve is adjusted only by focusing on a target back pressure value, the problem of back pressure overshoot in the throttle valve adjusting process is not considered, and the overshooting back pressure causes shaft water hammer pressure, so that the problems of overflow and well leakage of a narrow density window are caused.
Disclosure of Invention
The invention provides a control method of a pressure-limiting and regulating valve for pressure-controlled drilling based on a cubic spline curve, overcomes the defects of the prior art, and can effectively solve the problem of back pressure overshoot in the regulating process of the existing throttle valve.
The technical scheme of the invention is realized by the following measures: a control method of pressure-control drilling pressure-limiting regulation valve based on cubic spline curve includes adjusting opening degree of a throttle valve to control wellhead back pressure when gas-liquid two-phase flow flows through a pressure-control drilling wellhead throttle valve, calculating opening degree of the throttle valve by utilizing limited wellhead back pressure in combination with a wellbore multiphase flow model, a wellbore multiphase water hammer pressure model, a multiphase water hammer transient pressure model and a multiphase water hammer pressure inversion throttle opening degree model before or during adjustment of the opening degree of the throttle valve, fitting the opening degree of the throttle valve through cubic spline fitting the opening degree of the throttle valve model to obtain a throttle valve action curve, and adjusting the opening degree of the throttle valve according to the throttle valve action curve.
The following is further optimization or/and improvement of the technical scheme of the invention:
the throttle opening value and the throttle action curve are obtained according to the following method:
the oil-gas-drilling fluid three-phase fluid continuous equation is as follows:
in the formula (1), A is the annular cross-sectional area, rhokIs the density of the oil phase, the gas phase and the drilling liquid phase, phikVolume fractions of oil phase, gas phase and drilling liquid phase, vkIs the oil/gas/drilling fluid phase velocity, k is the oil phase gas phase and the drilling fluid phase, t is the time, s is the annulus length,
the oil-gas-drilling fluid three-phase fluid momentum conservation is as follows:
in the formula (2), g is gravity acceleration; p is a radical offIn order to obtain the friction gradient, the friction gradient is adopted,
dispersing the annulus into N grids, and solving the grids one by one along the well bottom to the well head, wherein the continuous equation differential format of the drilling fluid is as follows:
the spillover oil continuity equation difference format is as follows:
considering gas phase solubility, the overflow gas phase continuous equation difference format is as follows:
the difference format of the conservation of momentum equation is as follows:
in the formula (6), the first and second groups,
in the formula (9), vsm、vso、vsgSlip velocity, rho, of drilling fluid, formation oil and formation gas, respectivelym、ρo、ρgDensity of drilling fluid, formation oil and formation gas respectively;
taking an annular infinitesimal section as a control body, wherein the motion equation is as follows:
in the formula (10), p is pressure (back pressure), g is gravity acceleration, s is well length along the annulus, theta is the included angle between the annulus and the horizontal plane, and tauoIs the friction stress of the drilling fluid to the annular hollow wall, X is the control body wet circumference,
the conservation of momentum equation is:
in the formula (11), rho is the density of the drilling fluid, A is the effective sectional area of the annulus, v is the flow velocity of the drilling fluid in the annulus, t is time,
the pressure wave velocity is calculated by equation (12),
in the formula (12), c is the pressure wave velocity;
step 3, calculating the water hammer pressure and flow rate by using multiphase flow parameters (including A, etc.), pressure wave velocity and a multiphase water hammer transient pressure model, wherein the multiphase water hammer transient pressure model comprises formulas (13) to (15), calculating the throttle opening by using a multiphase water hammer pressure inversion throttle opening model,
the two characteristic line equations are: dx/dt ═ v ± c (13)
The positive difference equation can be obtained along the positive direction of the characteristic line:
c+：Hi+1＝Hi-B(Qi+1-Qi)-RQi|Qi| (14)
the negative difference equation can be obtained along the opposite direction of the characteristic line:
c-：Hi＝Hi+1-B(Qi-Qi+1)+RQi+1|Qi+1| (15)
in the formulae (13) to (15), B is the transfer parameter value c/(g.A), and R is the transfer parameter value f.DELTA.x/(2. g.D.A)2)，HiIs the water head pressure, D is the pipe diameter, f is the friction coefficient, c + is along the v + c direction, c-is along the v-c direction,
considering the flow coefficient and the opening coefficient, a multiphase water hammer pressure inversion throttle valve opening model is provided, wherein,
the model of the opening flow of the multi-phase water hammer pressure inversion throttle valve comprises the following steps:
the model of the opening of the multi-phase water hammer pressure inversion throttle valve is as follows:
in the formula (17), τ (j) is the throttle opening, Q is the throttle flow, and TmaxThe pressure time is limited by the throttle valve, delta t is the throttle valve adjusting interval, zeta is the throttle valve flow coefficient, and O is the opening coefficient;
because the throttle valve adjusting process is a continuous curve, the throttle valve opening calculated according to the multiphase water hammer pressure inversion throttle valve opening model is a scatter point, therefore, the throttle valve opening is fitted by adopting a cubic spline function interpolation method, and a three-turn square cubic spline fitting throttle valve opening model is constructed as follows:
in the formula (18), αj(x)、βj(x) For the interpolated void fraction and slip speed for each flow pattern,
between two nodes [ x ]j，xj+1]Above, the throttle opening (parameter curve) is expressed as:
in the formula (19), hjStep size, xjNode variable, mjObtained using boundary conditions.
After the control method disclosed by the invention is used for controlling the opening of the throttle valve, the effect of limiting the back pressure fluctuation can be achieved, the back pressure control of the pressure control drilling wellhead is stable, the problems of overflow and well leakage of a narrow density window possibly caused by the overshoot of the throttle valve can be avoided, the drilling complexity is reduced, and the pressure control of a shaft is more refined.
Drawings
FIG. 1 is a graph showing the change in back pressure when the back pressure is limited to 0.9 MPa.
FIG. 2 is a graph showing the change in back pressure when the back pressure is limited to 0.8 MPa.
FIG. 3 is a graph showing the change in back pressure when the back pressure is limited to 0.7 MPa.
FIG. 4 is a graph showing the change in back pressure when the back pressure is limited to 0.6 MPa.
FIG. 5 is a pressure wave velocity grid plot.
FIG. 6 is a schematic diagram of the technical idea of the control method of the pressure limiting and regulating valve for pressure controlled drilling based on cubic spline curve.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
The invention is further described below with reference to the following examples:
example 1: as shown in fig. 6, the control method of the pressure-limiting and regulating valve for pressure-controlled drilling based on the cubic spline curve includes adjusting the opening of the throttle valve to control the wellhead back pressure when gas-liquid two-phase flow flows through the pressure-controlled drilling wellhead throttle valve, calculating the opening value of the throttle valve by using the limited wellhead back pressure to combine a wellbore multiphase flow model, a wellbore multiphase water hammer pressure model, a multiphase water hammer transient pressure model and a multiphase water hammer pressure inversion throttle opening model before adjusting the opening of the throttle valve, fitting the opening value of the throttle valve through the cubic spline fitting throttle valve opening model to obtain a throttle valve action curve, and adjusting the opening of the throttle valve according to the throttle valve action curve;
the throttle opening value and the throttle action curve are obtained according to the following method:
the oil-gas-drilling fluid three-phase fluid continuous equation is as follows:
in the formula (1), A is the annular cross-sectional area, rhokIs the density of the oil phase, the gas phase and the drilling liquid phase, phikVolume fractions of oil phase, gas phase and drilling liquid phase, vkIs the oil/gas/drilling fluid phase velocity, k is the oil phase gas phase and the drilling fluid phase, t is the time, s is the annulus length,
the oil-gas-drilling fluid three-phase fluid momentum conservation is as follows:
in the formula (2), g is gravity acceleration; p is a radical offGradient of friction resistance，
Dispersing the annulus into N grids, and solving the grids one by one along the well bottom to the well head, wherein the continuous equation differential format of the drilling fluid is as follows:
the spillover oil continuity equation difference format is as follows:
considering gas phase solubility, the overflow gas phase continuous equation difference format is as follows:
the difference format of the conservation of momentum equation is as follows:
in the formula (6), the first and second groups,
in the formula (9), vsm、vso、vsgSlip velocity, rho, of drilling fluid, formation oil and formation gas, respectivelym、ρo、ρgDensity of drilling fluid, formation oil and formation gas respectively;
taking an annular infinitesimal section as a control body, wherein the motion equation is as follows:
in the formula (10), p is pressure (back pressure), g is gravity acceleration, s is well length along the annulus, theta is the included angle between the annulus and the horizontal plane, and tauoIs the friction stress of the drilling fluid to the annular hollow wall, X is the control body wet circumference,
the conservation of momentum equation is:
in the formula (11), rho is the density of the drilling fluid, A is the effective sectional area of the annulus, v is the flow velocity of the drilling fluid in the annulus, t is time,
the pressure wave velocity is calculated by equation (12),
in the formula (12), c is the pressure wave velocity, and the pressure wave velocity meshing diagram is shown in FIG. 5;
step 3, calculating the water hammer pressure and flow rate by using multiphase flow parameters (including A, etc.), pressure wave velocity and a multiphase water hammer transient pressure model, wherein the multiphase water hammer transient pressure model comprises formulas (13) to (15), calculating the throttle opening by using a multiphase water hammer pressure inversion throttle opening model,
the two characteristic line equations are: dx/dt ═ v ± c (13)
The positive difference equation can be obtained along the positive direction of the characteristic line:
c+：Hi+1＝Hi-B(Qi+1-Qi)-RQi|Qi| (14)
the negative difference equation can be obtained along the opposite direction of the characteristic line:
c-：Hi＝Hi+1-B(Qi-Qi+1)+RQi+1|Qi+1| (15)
in the formulae (13) to (15), B is the transfer parameter value c/(g.A), and R is the transfer parameter value f.DELTA.x/(2. g.D.A)2)，HiIs the water head pressure, D is the pipe diameter, f is the friction coefficient, c + is along the v + c direction, c-is along the v-c direction,
considering the flow coefficient and the opening coefficient, a multiphase water hammer pressure inversion throttle valve opening model is provided, wherein,
the model of the opening flow of the multi-phase water hammer pressure inversion throttle valve comprises the following steps:
the model of the opening of the multi-phase water hammer pressure inversion throttle valve is as follows:
in the formula (17), τ (j) is the throttle opening, Q is the throttle flow, and TmaxThe pressure time is limited by the throttle valve, delta t is the throttle valve adjusting interval, zeta is the throttle valve flow coefficient, and O is the opening coefficient;
because the throttle valve adjusting process is a continuous curve, the throttle valve opening calculated according to the multiphase water hammer pressure inversion throttle valve opening model is a scatter point, therefore, the throttle valve opening is fitted by adopting a cubic spline function interpolation method, and a three-turn square cubic spline fitting throttle valve opening model is constructed as follows:
in the formula (18), αj(x)、βj(x) For interpolation, the void ratio and slip speed (instantaneous speed) under each flow pattern are within two node intervals [ x ]j，xj+1]Above, the throttle opening (parameter curve) is expressed as:
in the formula (19), hjStep size, xjNode variable, mjObtained using boundary conditions.
mjThe method is obtained by combining boundary conditions with a multiphase water hammer transient pressure model, a multiphase water hammer pressure inversion throttle opening flow model, a multiphase water hammer pressure inversion throttle opening model and a cubic spline fitting throttle opening model.
Wellbore multiphase flow modeling is well known in the art.
Example 2: when the limited back pressure is 0.9MPa, the back pressure changes as shown in fig. 1 after throttle opening control is performed according to the control method described in embodiment 1.
Example 3: when the limited back pressure is 0.8MPa, the back pressure changes as shown in fig. 2 after the throttle opening degree control is performed according to the control method described in embodiment 1.
Example 4: when the limited back pressure is 0.7MPa, the back pressure changes as shown in fig. 3 after the throttle opening degree control is performed according to the control method described in embodiment 1.
Example 5: when the limited back pressure is 0.6MPa, the back pressure changes as shown in fig. 4 after the throttle opening degree control is performed according to the control method described in embodiment 1.
As can be seen from fig. 1 to 4, after the control method of the present invention is used to control the opening of the throttle valve, the effect of limiting the back pressure fluctuation can be achieved.
The invention provides a multiphase water hammer pressure inversion throttle valve opening model, a flow coefficient and an opening coefficient for the first time.
After the control method disclosed by the invention is used for controlling the opening of the throttle valve, the effect of limiting the back pressure fluctuation can be achieved, the back pressure control of the pressure control drilling wellhead is stable, the problems of overflow and well leakage of a narrow density window possibly caused by the overshoot of the throttle valve can be avoided, the drilling complexity is reduced, and the pressure control of a shaft is more refined.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (2)
1. A control method of pressure-control drilling pressure-limiting regulation valve based on cubic spline curve is characterized by comprising the steps of adjusting the opening degree of a throttle valve to control the back pressure of a well mouth when gas-liquid two-phase flow flows through a pressure-control drilling well mouth throttle valve, calculating the opening degree of the throttle valve by utilizing the limited well mouth back pressure in combination with a well bore multiphase flow model, a well bore multiphase water attack pressure model, a multiphase water attack transient pressure model and a multiphase water attack pressure inversion throttle opening degree model before or during the adjustment of the opening degree of the throttle valve, fitting the opening degree of the throttle valve through cubic spline fitting to obtain a throttle valve action curve, and adjusting the opening degree of the throttle valve according to the throttle valve action curve.
2. The control method of the cubic spline-based pressure-controlled drilling pressure-limiting and regulating valve according to claim 1, wherein the throttle opening value and the throttle action curve are obtained by the following method:
step 1, inputting pressure-controlled drilling wellhead related original data into a wellbore multiphase flow model, wherein the original data comprises wellhead annulus sectional area, densities of an oil phase, a gas phase and a drilling liquid phase, volume fractions of the oil phase, the gas phase and the drilling liquid phase, speeds of the oil phase, the gas phase and the drilling liquid phase and annulus length, the wellbore multiphase flow model comprises formulas (1) to (6), and multiphase flow parameters are calculated through the wellbore multiphase flow model,
the oil-gas-drilling fluid three-phase fluid continuous equation is as follows:
in the formula (1), A is the annular cross-sectional area, rhokIs the density of the oil phase, the gas phase and the drilling liquid phase, phikVolume fractions of oil phase, gas phase and drilling liquid phase, vkIs the oil/gas/drilling fluid phase velocity, k is the oil phase gas phase and the drilling fluid phase, t is the time, s is the annulus length,
the oil-gas-drilling fluid three-phase fluid momentum conservation is as follows:
in the formula (2), g is gravity acceleration; p is a radical offIn order to obtain the friction gradient, the friction gradient is adopted,
dispersing the annulus into N grids, and solving the grids one by one along the well bottom to the well head, wherein the continuous equation differential format of the drilling fluid is as follows:
the spillover oil continuity equation difference format is as follows:
the overflow gas phase continuous equation difference format is as follows:
the difference format of the conservation of momentum equation is as follows:
in the formula (6), the first and second groups,
in the formula (9), vsm、vso、vsgSlip velocity, rho, of drilling fluid, formation oil and formation gas, respectivelym、ρo、ρgDensity of drilling fluid, formation oil and formation gas respectively;
step 2, calculating the multiphase pressure wave velocity by using a shaft multiphase water hammer pressure model, wherein the shaft multiphase water hammer pressure model is as follows:
taking an annular infinitesimal section as a control body, wherein the motion equation is as follows:
in the formula (10), p is pressure, g is gravity acceleration, s is well length along the annulus, theta is the included angle between the annulus and the horizontal plane, and tauoIs the friction stress of the drilling fluid to the annular hollow wall, X is the control body wet circumference,
the conservation of momentum equation is:
in the formula (11), rho is the density of the drilling fluid, A is the effective sectional area of the annulus, v is the flow velocity of the drilling fluid in the annulus, t is time,
the pressure wave velocity is calculated by equation (12),
in the formula (12), c is the pressure wave velocity;
step 3, calculating the water hammer pressure and flow rate by using the multiphase flow parameters, the pressure wave velocity and the multiphase water hammer transient pressure model, wherein the multiphase water hammer transient pressure model comprises formulas (13) to (15), calculating the throttle opening by using the multiphase water hammer pressure inversion throttle opening model,
the two characteristic line equations are: dx/dt ═ v ± c (13)
The positive difference equation can be obtained along the positive direction of the characteristic line:
c+：Hi+1＝Hi-B(Qi+1-Qi)-RQi|Qi| (14)
the negative difference equation can be obtained along the opposite direction of the characteristic line:
c-：Hi＝Hi+1-B(Qi-Qi+1)+RQi+1|Qi+1| (15)
in the formulae (13) to (15), B is the transfer parameter value c/(g.A), and R is the transfer parameter value f.DELTA.x/(2. g.D.A)2)，HiIs the water head pressure, D is the pipe diameter, f is the friction coefficient, c + is along the v + c direction, c-is along the v-c direction,
the model of the opening flow of the multi-phase water hammer pressure inversion throttle valve comprises the following steps:
the model of the opening of the multi-phase water hammer pressure inversion throttle valve is as follows:
in the formula (17), τ (j) is the throttle opening, Q is the throttle flow, and TmaxFor throttle valve limiting pressure time, Δ t is throttle valve adjustment interval, ζ is throttle valve flow coefficient, and O is opening systemCounting;
step 4, fitting the throttle opening degree value by utilizing a cubic spline fitting throttle opening degree model to obtain a throttle opening degree action curve,
the cubic spline fitting throttle opening model is as follows:
in the formula (18), αj(x)、βj(x) For the interpolated void fraction and slip speed for each flow pattern,
between two nodes [ x ]j，xj+1]Above, the throttle opening is expressed as:
in the formula (19), hjStep size, xjNode variable, mjObtained using boundary conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446239.3A CN112459747A (en) | 2020-12-08 | 2020-12-08 | Control method of pressure-limiting and regulating valve for pressure-controlled drilling based on cubic spline curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446239.3A CN112459747A (en) | 2020-12-08 | 2020-12-08 | Control method of pressure-limiting and regulating valve for pressure-controlled drilling based on cubic spline curve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112459747A true CN112459747A (en) | 2021-03-09 |
Family
ID=74801440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011446239.3A Pending CN112459747A (en) | 2020-12-08 | 2020-12-08 | Control method of pressure-limiting and regulating valve for pressure-controlled drilling based on cubic spline curve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112459747A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901144A (en) * | 2021-03-11 | 2021-06-04 | 西南石油大学 | Special structure well shaft overflow dynamic characteristic analysis method |
| CN114963014A (en) * | 2022-06-10 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Natural gas conveying consumption reduction method for optimizing valve opening degree and reducing fluctuation pressure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852076A (en) * | 2010-03-31 | 2010-10-06 | 中国石油天然气集团公司 | Underground working condition simulation method for controlled pressure drilling experiment and test |
| CN102943620A (en) * | 2012-08-27 | 2013-02-27 | 中国石油大学(华东) | Pressure-controlled drilling method based on drilling annulus wellbore multi-phase flow computing |
| CN107191154A (en) * | 2016-03-15 | 2017-09-22 | 中国石油化工股份有限公司 | Wellhead back pressure regulates and controls method and apparatus |
| CN107194019A (en) * | 2016-03-15 | 2017-09-22 | 中国石油化工股份有限公司 | A kind of aperture regulation method and apparatus of choke valve |
| CN110424954A (en) * | 2019-08-09 | 2019-11-08 | 西南石油大学 | Annular space transient state water attack model based on mineshaft annulus transient multi-phase stream flow characteristics |
| CN111197480A (en) * | 2018-10-31 | 2020-05-26 | 北京国双科技有限公司 | Information processing method and related equipment |
-
2020
- 2020-12-08 CN CN202011446239.3A patent/CN112459747A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852076A (en) * | 2010-03-31 | 2010-10-06 | 中国石油天然气集团公司 | Underground working condition simulation method for controlled pressure drilling experiment and test |
| CN102943620A (en) * | 2012-08-27 | 2013-02-27 | 中国石油大学(华东) | Pressure-controlled drilling method based on drilling annulus wellbore multi-phase flow computing |
| CN107191154A (en) * | 2016-03-15 | 2017-09-22 | 中国石油化工股份有限公司 | Wellhead back pressure regulates and controls method and apparatus |
| CN107194019A (en) * | 2016-03-15 | 2017-09-22 | 中国石油化工股份有限公司 | A kind of aperture regulation method and apparatus of choke valve |
| CN111197480A (en) * | 2018-10-31 | 2020-05-26 | 北京国双科技有限公司 | Information processing method and related equipment |
| CN110424954A (en) * | 2019-08-09 | 2019-11-08 | 西南石油大学 | Annular space transient state water attack model based on mineshaft annulus transient multi-phase stream flow characteristics |
Non-Patent Citations (5)
| Title |
|---|
| 孔祥伟: "微流量地面自动控制系统关键技术研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 孔祥伟等: "气侵钻井过程中井底衡压的节流阀开度控制研究", 《应用数学和力学》 * |
| 沈建文: "微流量控制钻井环空波动压力反问题研究", 《应用力学学报》 * |
| 罗朝东: "深井气侵关井引发的井筒多相水击压力特性研究", 《应用力学学报》 * |
| 金业权等: "控压钻井中节流阀开度与节流压力的关系研究", 《石油机械》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901144A (en) * | 2021-03-11 | 2021-06-04 | 西南石油大学 | Special structure well shaft overflow dynamic characteristic analysis method |
| CN114963014A (en) * | 2022-06-10 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Natural gas conveying consumption reduction method for optimizing valve opening degree and reducing fluctuation pressure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0588421B1 (en) | Method and production pipe in an oil or gas reservoir | |
| CN112459747A (en) | Control method of pressure-limiting and regulating valve for pressure-controlled drilling based on cubic spline curve | |
| US11021919B2 (en) | Mud circulation system for reducing the swab pressure while tripping out | |
| CN112112609B (en) | Method for realizing size regulation and control of back-flow oil nozzle after gas reservoir pressure | |
| CN105625991B (en) | A kind of water and oil control for oil extraction system flows into controller | |
| EP2432968B1 (en) | Apparatus and method for modeling well designs and well performance | |
| US7172020B2 (en) | Oil production optimization and enhanced recovery method and apparatus for oil fields with high gas-to-oil ratio | |
| EP1390603A1 (en) | Arrangement for and method of restricting the inflow of formation water to a well | |
| Daneshy et al. | Inflow-control-device design: revisiting objectives and techniques | |
| CN111648768A (en) | Method for determining reasonable yield system of water producing gas well of tight gas reservoir | |
| US6173784B1 (en) | Method and device for production of hydrocarbons | |
| CN115879644A (en) | Shale gas well production mode optimization method based on optimized tubular column | |
| CN111399373A (en) | GIN grouting flow pressure intelligent control method | |
| CN110593856B (en) | Method for measuring density window of well cementation safety operation | |
| CN111626001B (en) | Method for improving refined water injection of oil extraction well | |
| CN112101710B (en) | Quantitative injection and mining balance adjustment method based on water drive front edge control | |
| RU2539486C1 (en) | Method for oil development with horizontal wells | |
| US20210198556A1 (en) | Enhanced oil recovery method by nanofluid-assisted co2 huff-n-puff | |
| Bolujo et al. | A new model for predicting liquid loading in multiphase gas wells | |
| CN113236203B (en) | Water invasion dynamic production allocation method for carbonate rock with water-gas reservoir | |
| CN114622892A (en) | Automatic well killing simulation device for pressure-controlled drilling and fine control back pressure method | |
| RU2598661C2 (en) | Pressure control during drilling operations with the help of correction used in preset conditions | |
| US5967234A (en) | Method of and device for production of hydrocarbons | |
| Wang et al. | Managed pressure drilling technology: A research on the formation adaptability | |
| CN116411871A (en) | Method and system for regulating and controlling opening of throttle valve in multi-step linear time-limited manner in fine pressure-control drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210309 |
|
| RJ01 | Rejection of invention patent application after publication |