CN108756792B - Deep sea drilling water hole blockage monitoring and drilling pump damage identification method - Google Patents
Deep sea drilling water hole blockage monitoring and drilling pump damage identification method Download PDFInfo
- Publication number
- CN108756792B CN108756792B CN201810516470.1A CN201810516470A CN108756792B CN 108756792 B CN108756792 B CN 108756792B CN 201810516470 A CN201810516470 A CN 201810516470A CN 108756792 B CN108756792 B CN 108756792B
- Authority
- CN
- China
- Prior art keywords
- drilling
- mass flow
- inlet
- water hole
- outlet
- 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.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 28
- 230000008859 change Effects 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 description 4
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 239000013535 sea water Substances 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
the invention relates to a deep sea drilling water hole blockage monitoring and drilling pump damage identification method which comprises the following steps of 1) arranging a first mass flow meter at an inlet of a drilling circulating system, arranging a second mass flow meter at an outlet of the drilling circulating system, respectively acquiring mass flow data of the drilling inlet and the drilling outlet in real time by the first mass flow meter and the second mass flow meter, and transmitting the acquired data to a data processing and analyzing end, 2) monitoring the drilling water hole blockage condition of a drilling well by the data processing and analyzing end, wherein the first step ② that when the pumping pressure ② increased, if the inlet mass flow does not change along with time, the outlet mass flow does not change along with time, and the outlet flow and the inlet flow are always equal, the reason that the pumping pressure ② increased ② caused by the drilling water hole blockage, the second step ② that the number of the drilling water hole blockage ② further judged under the condition that the drilling water hole blockage occurs, and 3) the data processing and analyzing end ② used for carrying out the drilling pump damage condition.
Description
Technical Field
The invention relates to a method for monitoring blockage of a deep sea drilling water hole and identifying damage of a drilling pump, and belongs to the field of offshore oil development.
Background
In the deep sea drilling operation, the conditions of blockage of a drill bit water hole and damage of a drilling pump frequently occur, and if the conditions cannot be found in time, disastrous results can be caused, so that the monitoring technology for the blockage of the drill bit water hole and the damage of the drilling pump in the deep sea drilling is more and more concerned. With the rapid development of the drilling industry, a plurality of methods for monitoring the blockage of a water hole and the damage of a drilling pump exist, but the monitoring methods are not high enough in precision and can cause misjudgment, and the monitoring methods are not timely and cannot effectively take remedial measures.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a method for monitoring the blockage of a deep sea drilling water hole and identifying the damage of a drilling pump with higher accuracy.
In order to achieve the purpose, the invention adopts the following technical scheme: a deep sea drilling water hole blockage monitoring and drilling pump damage identification method comprises the following steps:
1) the method comprises the following steps that a first mass flowmeter is arranged at an inlet of a drilling circulation system, a second mass flowmeter is arranged at an outlet of the drilling circulation system, the first mass flowmeter and the second mass flowmeter respectively collect mass flow data at the inlet and the outlet of the drilling circulation system in real time, and the collected data are transmitted to a data processing and analyzing end;
2) the data processing and analyzing end monitors the blockage of the drill hole of the well drilling through the following data processing processes:
①, when the pump pressure rises, if the mass flow of an inlet does not change along with time, the mass flow of an outlet does not change along with time, and the flow of the outlet and the flow of the inlet are always equal, determining that the reason of the rise of the pump pressure is caused by the blockage of a drill bit water hole;
secondly, under the condition that the drill bit water hole blockage is determined, further judging the number of the drill bit water hole blockage, specifically:
pumping pressure delta p when the water hole is not blocked by the drill bits0In combination with the formula Δ ps0＝P+Δpb0Calculating the bit pressure drop Δ pb0；
And calculating K according to the following formula:
the data processing and analyzing end reads the pumping pressure delta p after the drill hole is blockedsmIn combination with the formula Δ psm＝P+ΔpbmCalculating the pressure drop delta p when the water hole of the drill bit is blockedbm；
And then the number m of the blocked drill holes is calculated according to the following formula:
in the above formula, P is a constant; n represents the number of drill holes; k represents a constant, and the expression is as follows:
rho in the formuladThe density of the drilling fluid is represented, Q represents the drilling fluid flow of the nozzle, C represents the nozzle flow coefficient, and d represents the diameter of a water hole;
3) the data processing and analyzing end monitors the damage condition of the drilling pump through the following data processing processes:
setting a series of time nodes ti(i ═ 0,1, 2.., n), at tiThe mass flow at the drilling inlet corresponding to the moment is Qpithe percentage of pumping loss is eta and the initial mass flow at the drilling inlet is Qp0And:
η＝1-Qpi/Qp0
the pump failure percentage, η, is used to quantify the degree of pump failure.
② in the step 2), P ═ Δ Pg+Δpst+ΔpaΔ p in the formulagRepresenting surface manifold pressure loss, Δ pstRepresenting the internal pressure loss in the drill string, Δ paIndicating the loss of the annulus pressure.
in the step 3), when the value of η exceeds 10%, the drilling pump is indicated to be seriously failed.
The first mass flowmeter and the second mass flowmeter both adopt Coriolis mass flowmeters.
The inlet of the first mass flow meter is connected with the drilling inlet main pipe through a first valve, the outlet of the first mass flow meter is connected with the drilling inlet main pipe through a second valve, and a third valve is arranged on the drilling inlet main pipe between the inlet and the outlet of the first mass flow meter; the inlet of the second mass flow meter is connected with the drilling outlet main pipe through a fourth valve, the outlet of the second mass flow meter is connected with the drilling outlet main pipe through a fifth valve, and a sixth valve is arranged on the drilling outlet main pipe between the inlet and the outlet of the second mass flow meter.
Due to the adoption of the technical scheme, the invention has the following advantages: the invention monitors the flow change of the drilling inlet and the drilling outlet by arranging the first mass flow meter and the second mass flow meter at the drilling inlet and the drilling outlet, and further monitors the blockage condition of a drill bit water hole and the damage condition of a drilling pump by the flow change. The invention has the advantages of high precision, large measuring range and high cost performance.
Drawings
FIG. 1 is a schematic view of the flow conditions during drilling when a bit hole becomes plugged;
FIG. 2 is a schematic representation of the flow conditions during drilling when borehole pump damage occurs;
fig. 3 is a schematic diagram of a coriolis mass flowmeter.
The reference numerals in the figures have the following meanings:
1. a mud pit; 2. drilling fluid; 3. a slurry pump line; 4. a slurry pump; 5. a first mass flow meter; 51. a measurement tube; 52. a sensor; 53. a vibration exciter; 54. a flange plate; 6. a third valve; 7. a second valve; 8. a first valve; 9. a first mass flow meter support; 10. a riser; 11. rotating the control head; 12. a diverter; 13. a blowout preventer stack; 14. a drill stem; 15. a drill bit; 16. a drill water hole; 17. a wellbore; 18. an earth formation; 19. a second mass flow meter; 20. a sixth valve; 21. a fourth valve; 22. a fifth valve; 23. a second mass flow meter support; 24. a throttle line; 25. a drilling fluid outlet; 26. a sensor data line; 27. a data processing and analyzing end; 28. a drilling platform; 29. a tension cord; 30. an expansion joint; 31. a riser; 32. seawater, 33, water hole blockage position; 34. a drilling pump damage location.
Detailed description of the preferred embodiment
The invention is described in detail below with reference to the figures and examples.
The invention provides a method for monitoring blockage of a deep sea drilling water hole and identifying damage of a drilling pump, which comprises the following steps:
1) as shown in fig. 1 and 2, a first mass flow meter is arranged at an inlet of the drilling circulation system, a second mass flow meter is arranged at an outlet of the drilling circulation system, and the first mass flow meter and the second mass flow meter respectively acquire mass flow data at the inlet and the outlet of the drilling circulation system in real time and transmit the acquired data to a data processing and analyzing end.
2) The data processing and analyzing end monitors the blockage condition of a drill hole of the well drilling through the following data processing processes:
①, when the pump pressure rises, whether the drill hole blockage occurs is judged
The drilling fluid has a certain pumping pressure when being discharged from the drilling pump. The pump pressure is increased due to the blockage of the drill bit water hole, but the pump pressure is also possibly caused by the working conditions of gas invasion and the like, so whether the water hole blockage occurs or not needs to be further judged through mass flow data at an outlet and an inlet of a well, and particularly, when the mass flow of the inlet does not change along with the time, the mass flow of the outlet does not change along with the time, and the mass flow of the outlet and the mass flow of the inlet are equal to each other all the time, the reason of the pump pressure increase can be determined to be the drill bit water hole blockage.
the drilling fluid consumes the pump pressure when flowing through the ground manifold, the drill bit nozzle and the annular space, and the basic relation of the pump pressure transmission is as follows:
Ps＝Δpg+Δpst+Δpa+Δpb
in the formula, PsRepresenting drilling pump pressure; Δ pgRepresenting the surface manifold pressure loss; Δ pstRepresenting the internal pressure loss of the drill string; Δ paIndicating the annular pressure loss; Δ pbIndicating the bit pressure drop.
When the pressure loss of a surface manifold, the pressure loss in a drill string and the annular pressure loss are kept unchanged, the change of the pressure drop of the drill bit directly causes the change of the pump pressure. The sum of the surface manifold pressure loss, the drill string internal pressure loss, and the annulus pressure loss is represented by a constant P, where P iss＝P+Δpb. Wherein, the calculation formula of the bit pressure drop is as follows:
in the formula (d)neRepresents the nozzle equivalent diameter; rhodRepresents the density of the drilling fluid; c represents a nozzle flow coefficient; q represents the drilling fluid flow rate of the nozzle.
Wherein the nozzle equivalent diameter dneThe calculation formula of (a) is as follows:
in the formula (d)iRepresents the nozzle diameter; z represents the number of nozzles;
therefore, under the condition that the drilling fluid flow rate, the nozzle flow coefficient and the drilling fluid density of the nozzle are not changed, the change of the nozzle equivalent diameter directly determines the change of the pumping pressure, the equivalent diameter is reduced along with the increase of the number of the blocked drill holes, and the pumping pressure is increased along with the reduction of the equivalent diameter. The change condition of the pump pressure can be directly seen on the data processing and analyzing end, and the number of the blocked drill holes can be judged according to the change of the pump pressure.
Here, theThe detailed analysis is to judge the number of the water holes blocked by the drill bit: if n drill holes are provided, the diameter of each drill hole is d, and the equivalent diameter d of the nozzleneCan be expressed as:
when the drill hole is not blocked, the equivalent diameter is
At this time, the bit pressure drop Δ pb0Can be expressed as:
in the formula
Is a constant, constant value, denoted by K.
The pump pressure will rise continuously with the increase of the number of the blocked drill holes, and if the number of the blocked drill holes is m, the drill pressure drop delta p is generated when the drill holes are blocked by mbmCan be expressed as:
thus the pumping pressure Δ p when there is no blockage of the drill bit ports0Comprises the following steps:
Δps0＝P+Δpb0
when the number of the blocked drill holes is m, pumping pressure delta psmComprises the following steps:
Δpsm＝P+Δpbm
therefore, the number of the blocked drill holes can be judged according to the change of the pump pressure, and the pump pressure delta p when the drill holes are not blocked can be read at the data processing and analyzing ends0Data so that Δ p can be calculatedb0And then the value of the constant K is calculated. Observing the change in pump pressure on the data processing and analyzing systemAccording to the new pump pressure deltap displayed by the processing and analysis endsmCalculating Δ pbmThereby calculating the number m of the blocked water holes of the drill bit.
3) The data processing and analyzing end monitors the damage condition of the drilling pump through the following data processing processes:
the pump efficiency loss conditions at different time points can be monitored according to the inlet and outlet flow data of the data processing and analyzing end. Setting a series of time nodes ti(i ═ 0,1, 2.., n), at tiThe mass flow at the drilling inlet corresponding to the moment is Qpithe percentage of pumping loss is eta and the initial mass flow at the drilling inlet is Qp0When the pump is damaged, the outlet flow is unchanged, the inlet flow is reduced, and the loss degree of the pump efficiency can be judged according to the reduction of the inlet mass flow.
Wherein: qpiThe pump stroke is multiplied by the cylinder sleeve volume and multiplied by the pump efficiency;
η＝1-Qpi/Qp0
when the value of η exceeds 10 percent, the drilling pump is proved to be seriously failed.
In the above embodiment, the first mass flow meter 5 and the second mass flow meter 19 each employ a coriolis mass flow meter. Wherein, the inlet of the first mass flow meter 5 is connected with the drilling inlet manifold through a first valve 8 (as shown in fig. 3), the outlet of the first mass flow meter 5 is connected with the drilling inlet manifold through a second valve 7, and a third valve 6 is arranged on the drilling inlet manifold between the inlet and the outlet of the first mass flow meter 5; the inlet of the second mass flow meter 19 is connected to the drilling outlet manifold via a fourth valve 21, the outlet of the second mass flow meter 19 is connected to the drilling outlet manifold via a fifth valve 22, and a sixth valve 20 is arranged in the drilling outlet manifold between the inlet and the outlet of the second mass flow meter 19. The first valve 8, the second valve 7 and the third valve 6 are used for controlling whether the drilling fluid flows through the first mass flow meter 5, when the third valve 6 is opened and the first valve 8 and the second valve 7 are closed, the drilling fluid does not flow through the first mass flow meter 5, and the first mass flow meter 5 does not work; when the third valve 6 is closed and the first valve 8 and the second valve 7 are open, drilling fluid flows through the first mass flow meter 5 and the first mass flow meter 5 starts to operate. The fourth valve 21, the fifth valve 22 and the sixth valve 20 are used for controlling whether the drilling fluid flows through the second mass flow meter 19 or not, when the sixth valve 20 is opened and the fourth valve 21 and the fifth valve 22 are closed, the drilling fluid does not flow through the second mass flow meter 19, and the second mass flow meter 19 does not work; when the sixth valve 20 is closed and the fourth valve 21 and the fifth valve 22 are open, the drilling fluid flows through the second mass flow meter 19 and the second mass flow meter 19 starts to operate.
The working principle of the invention is as follows: drilling fluid is stored in the mud pit 1, drilling fluid 2 is injected by a mud pump 4 through a mud pump line 3 into the riser 10 (during which flow information is transmitted through a first mass flow meter 5 to a data processing and analysis end 27 via a sensor data line 26), then through the drill string 14 and the drill bit port 16 into the wellbore 17, and then circulated up the wellbore 17 to the wellhead, after flowing through the blowout preventer 13 and diverter 12, through a second mass flow meter 19 (which transmits flow information to a data acquisition and data processing and analysis end 27 via the sensor data line 26) and a choke line 24 back to the mud pit 1. The change condition of the shaft leakage amount is monitored through the change rule of the mass flow at the inlet and the outlet.
The above embodiments are only for illustrating the present invention, and the implementation steps of the method and the like can be changed, and all equivalent changes and modifications based on the technical scheme of the present invention should not be excluded from the protection scope of the present invention.
Claims (5)
1. A deep sea drilling water hole blockage monitoring and drilling pump damage identification method comprises the following steps:
1) the method comprises the following steps that a first mass flowmeter is arranged at an inlet of a drilling circulation system, a second mass flowmeter is arranged at an outlet of the drilling circulation system, the first mass flowmeter and the second mass flowmeter respectively collect mass flow data at the inlet and the outlet of the drilling circulation system in real time, and the collected data are transmitted to a data processing and analyzing end;
2) the data processing and analyzing end monitors the blockage condition of a drill hole of the well drilling through the following data processing processes:
①, when the pump pressure rises, if the mass flow of an inlet does not change along with time, the mass flow of an outlet does not change along with time, and the flow of the outlet and the flow of the inlet are always equal, determining that the reason of the rise of the pump pressure is caused by the blockage of a drill bit water hole;
secondly, under the condition that the drill bit water hole blockage is determined, further judging the number of the drill bit water hole blockage, specifically:
pumping pressure delta p when the water hole is not blocked by the drill bits0In combination with the formula Δ ps0＝P+Δpb0Calculating the bit pressure drop Δ pb0；
And calculating K according to the following formula:
the data processing and analyzing end reads the pumping pressure delta p after the drill hole is blockedsmIn combination with the formula Δ psm＝P+ΔpbmCalculating the pressure drop delta p when the water hole of the drill bit is blockedbm；
And then the number m of the blocked drill holes is calculated according to the following formula:
in the above formula, P represents the sum of the surface manifold pressure loss, the drill string internal pressure loss and the annulus pressure loss, and is a constant; n represents the number of drill holes; k represents a constant, and the expression is as follows:
rho in the formuladThe density of the drilling fluid is represented, Q represents the drilling fluid flow of a water hole, C represents a water hole flow coefficient, and d represents the diameter of the water hole;
3) the data processing and analyzing end monitors the damage condition of the drilling pump through the following data processing processes:
setting a series of time nodes tiI is 0,1,2, …, n, at tiThe mass flow at the drilling inlet corresponding to the moment is Qpithe percentage of pumping loss is eta and the initial mass flow at the drilling inlet is Qp0And:
η＝1-Qpi/Qp0
the percent pump efficiency loss, η, is used to quantify the degree of pump failure.
2. the method for monitoring the plugging of the deep sea drilling water hole and identifying the damage of the drilling pump as claimed in claim 1, wherein in the step 2), P ═ Δ Pg+Δpst+ΔpaΔ p in the formulagRepresenting surface manifold pressure loss, Δ pstRepresenting the internal pressure loss in the drill string, Δ paIndicating the loss of the annulus pressure.
3. the method for deep sea well bore plugging and well pump damage identification of claim 1 wherein in step 3) when η exceeds 10%, it is an indication that the well pump has failed significantly.
4. A method for deep sea drilling plugging monitoring and borehole pump damage identification as claimed in any one of claims 1-3 wherein: the first mass flowmeter and the second mass flowmeter both adopt Coriolis mass flowmeters.
5. The method for deep sea drilling hole plugging monitoring and drilling pump damage identification as claimed in claim 4, wherein: the inlet of the first mass flow meter is connected with the drilling inlet main pipe through a first valve, the outlet of the first mass flow meter is connected with the drilling inlet main pipe through a second valve, and a third valve is arranged on the drilling inlet main pipe between the inlet and the outlet of the first mass flow meter; the inlet of the second mass flow meter is connected with the drilling outlet main pipe through a fourth valve, the outlet of the second mass flow meter is connected with the drilling outlet main pipe through a fifth valve, and a sixth valve is arranged on the drilling outlet main pipe between the inlet and the outlet of the second mass flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810516470.1A CN108756792B (en) | 2018-05-25 | 2018-05-25 | Deep sea drilling water hole blockage monitoring and drilling pump damage identification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810516470.1A CN108756792B (en) | 2018-05-25 | 2018-05-25 | Deep sea drilling water hole blockage monitoring and drilling pump damage identification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108756792A CN108756792A (en) | 2018-11-06 |
| CN108756792B true CN108756792B (en) | 2020-06-02 |
Family
ID=64005822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810516470.1A Active CN108756792B (en) | 2018-05-25 | 2018-05-25 | Deep sea drilling water hole blockage monitoring and drilling pump damage identification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108756792B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513131U (en) * | 2009-09-04 | 2010-06-23 | 中国石油天然气集团公司 | Tubular column for drilling plugs in well repairing |
| CN102797451A (en) * | 2012-08-29 | 2012-11-28 | 中国海洋石油总公司 | Automatic control system and method for underground annulus pressure of deep water surface layer drilling |
| CN107701142A (en) * | 2017-10-21 | 2018-02-16 | 中国石油集团渤海钻探工程有限公司 | A kind of testing pressure of well head rotary sealing type casing blanking plug |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2532382B (en) * | 2013-10-18 | 2020-07-15 | Halliburton Energy Services Inc | Surface treated lost circulation material |
-
2018
- 2018-05-25 CN CN201810516470.1A patent/CN108756792B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513131U (en) * | 2009-09-04 | 2010-06-23 | 中国石油天然气集团公司 | Tubular column for drilling plugs in well repairing |
| CN102797451A (en) * | 2012-08-29 | 2012-11-28 | 中国海洋石油总公司 | Automatic control system and method for underground annulus pressure of deep water surface layer drilling |
| CN107701142A (en) * | 2017-10-21 | 2018-02-16 | 中国石油集团渤海钻探工程有限公司 | A kind of testing pressure of well head rotary sealing type casing blanking plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108756792A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108729868B (en) | Deep sea drilling overflow and lost circulation monitoring method | |
| US4430892A (en) | Pressure loss identifying apparatus and method for a drilling mud system | |
| CN103510893A (en) | Well drilling device and method for controlling bottom hole pressure by monitoring flow | |
| US20080010020A1 (en) | Method and System of Diagnosing Production Changes | |
| CN104504611B (en) | A kind of determining gas well whether the method for hydrops and its hydrops degree | |
| CN202755927U (en) | Well drilling device using flow monitoring to control bottom hole pressure | |
| CN102822445A (en) | Method for determining formation fluid control events in a borehole using a dynamic annular pressure control system | |
| CN103061753A (en) | Device for measuring downhole flow while drilling and monitoring early overflow | |
| CN104533407A (en) | Underground state determination method and device and state control method and device | |
| US20220065099A1 (en) | Closed-loop hydraulic drilling | |
| CN103470201A (en) | Fluid control system | |
| CN110325705A (en) | System and method for operating blowout preventer system | |
| US20230399902A1 (en) | Apparatus and method for early kick detection and loss of drilling mud in oilwell drilling operations | |
| CN103926422A (en) | Fluid measuring system and method | |
| CN103460262B (en) | Safety barrier alert method and system | |
| CN111502640B (en) | Device and method for measuring formation pore pressure and leakage pressure | |
| EP3551843B1 (en) | Fluid injection system | |
| CN108756792B (en) | Deep sea drilling water hole blockage monitoring and drilling pump damage identification method | |
| US20220403709A1 (en) | Well control system and method of use | |
| US4346594A (en) | Method for locating the depth of a drill string washout or lost circulation zone | |
| CN210217665U (en) | Liquid level stability control system | |
| CN106813721B (en) | Underground drilling gas-water separation type gas pumping and discharging amount monitoring method | |
| Zhao et al. | Early detection of drillstring washout based on hydraulics model and pattern recognition method | |
| CN217813444U (en) | Ultra-deep well underground condition detection and early warning system | |
| CN103244108B (en) | Formation pressure determination method under condition of failure in wall shut-in during blowout |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |