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CN-121993158-A - Method for determining flow of outlet of diversion trench and flow monitoring system of outlet of diversion trench

CN121993158ACN 121993158 ACN121993158 ACN 121993158ACN-121993158-A

Abstract

The application discloses a method for determining outlet flow of a diversion trench and a diversion trench outlet flow monitoring system, wherein the method comprises the steps of obtaining environment information in the outlet diversion trench and initial liquid level measurement information of drilling fluid, determining target liquid level of the drilling fluid in the outlet diversion trench based on the environment information and the initial liquid level measurement information, obtaining flow velocity measurement information of the drilling fluid in the outlet diversion trench, wherein the flow velocity measurement information is obtained by measuring drilling fluid impact in the outlet diversion trench, determining drilling fluid flow velocity in a non-full-pipe diversion trench based on the flow velocity measurement information, and determining outlet flow of the non-full-pipe diversion trench based on the target liquid level and the drilling fluid flow velocity. By the method, the speed of drilling fluid in the outlet diversion trench can be accurately monitored, the influence of environmental factors on a measurement result can be effectively reduced, the more accurate and reliable outlet flow of the non-full-pipe diversion trench is further obtained, and the monitoring precision is improved.

Inventors

  • DUAN MUBAI
  • HE LIQIN
  • WEI QIANG
  • HE XIANJIE
  • XUE QIULAI
  • DENG HU
  • HE MINGMIN
  • FENG YINXIANG
  • PENG HAO
  • LI LEI

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团川庆钻探工程有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (16)

  1. 1. The method for determining the outlet flow of the diversion trench is characterized by comprising the following steps of: acquiring environmental information in an outlet diversion trench and initial liquid level measurement information of drilling fluid; Determining a target liquid level of drilling fluid in the outlet diversion trench based on the environmental information and the initial liquid level measurement information; obtaining flow velocity measurement information of drilling fluid in an outlet diversion trench, wherein the flow velocity measurement information is obtained by measuring the impact force of the drilling fluid in the outlet diversion trench; Determining the flow rate of drilling fluid in the non-full pipe diversion trench based on the flow rate measurement information; and determining the outlet flow of the non-full pipe diversion trench based on the target liquid level and the drilling fluid flow rate.
  2. 2. The method for determining the outlet flow of the diversion trench according to claim 1, wherein the environmental information comprises at least one of temperature information and humidity information.
  3. 3. The method for determining the outlet flow rate of the diversion trench according to claim 1 or 2, further comprising, before obtaining the environmental information in the outlet diversion trench and the initial level measurement information of the drilling fluid: Measuring output data of a liquid level measuring module corresponding to different environmental data under a fixed liquid level in an experimental environment; and constructing a mapping relation model between the environmental information and the output quantity of the liquid level measuring device based on the measured output data and the corresponding environmental data.
  4. 4. The method of determining the outlet flow of a diversion trench of claim 3, wherein determining the target level of drilling fluid in the outlet diversion trench based on the environmental information and the initial level measurement information comprises: determining a liquid level correction coefficient based on the mapping relation model and the environmental information; And correcting the initial liquid level measurement information based on the liquid level correction coefficient to obtain the target liquid level.
  5. 5. The method of determining the outlet flow of a launder according to claim 4, wherein the liquid level correction factor is determined by the following formula: Where α denotes a correction coefficient, I y denotes initial liquid level measurement information, and I 0 (T 0 ,H 0 denotes reference liquid level information determined based on environmental information (T 0 ,H 0 ) and a map model.
  6. 6. The method of determining the outlet flow of a diversion trench of claim 1, wherein determining the drilling fluid flow rate in a non-full pipe diversion trench based on the flow rate measurement information comprises: acquiring torque information and moment information output by a flow rate measurement module; Based on the torque information and the moment information, calculating the impact force received by a contact body of the flow rate measurement module; and determining the flow rate of the drilling fluid in the non-full-pipe diversion trench based on the parameter information of the contact body, the drilling fluid density of the outlet diversion trench and the impact force.
  7. 7. The method of determining the outlet flow of a diversion trench according to claim 1 or 6, wherein the drilling fluid flow rate is determined by the following formula: S=π*(l/2) 2 ; F=W/l 1 ; Wherein V represents the flow rate of drilling fluid, F represents the impact force received by a contact body of a flow rate measurement module, ρ represents the drilling fluid density of an outlet diversion trench, l represents the diameter of the contact body, S represents the sectional area of the contact body, l 1 represents the moment of the flow rate measurement module, and W represents the torque output by the flow rate measurement module.
  8. 8. The method of determining the outlet flow of a diversion trench of claim 1, wherein determining the outlet flow of a non-full line diversion trench based on the target fluid level and the drilling fluid flow rate comprises: Determining the flow cross-sectional area of a non-full pipe diversion trench based on the target liquid level height and the inner diameter of the outlet diversion trench; the outlet flow rate is determined based on the flow cross-sectional area and the drilling fluid flow rate.
  9. 9. A device for determining the flow rate at the outlet of a diversion trench, comprising: The first acquisition module is used for acquiring environmental information in the outlet diversion trench and initial liquid level measurement information of the drilling fluid; The height determining module is used for determining the target liquid level height of the drilling fluid in the outlet diversion trench based on the environment information and the initial liquid level height measurement information; the second acquisition module is used for acquiring flow velocity measurement information of the drilling fluid in the outlet diversion trench, wherein the flow velocity measurement information is obtained by measuring the impact force of the drilling fluid in the outlet diversion trench; The flow rate determining module is used for determining the flow rate of the drilling fluid in the non-full-pipe diversion trench based on the flow rate measurement information; and the flow determining module is used for determining the outlet flow of the non-full-pipe diversion trench based on the target liquid level height and the drilling fluid flow rate.
  10. 10. The diversion trench outlet flow monitoring system is characterized by comprising a data processing module, a liquid level measuring module and a flow velocity measuring module; The liquid level measuring module is used for measuring the environment in the outlet diversion trench and the liquid level of the drilling fluid and outputting initial liquid level measuring information and environment information; The flow velocity measurement module is used for measuring the impact force of drilling fluid in the outlet diversion trench in a contact measurement mode and outputting flow velocity measurement information; The data processing module is used for determining the target liquid level of the drilling fluid in the outlet diversion trench based on the environment information and the initial liquid level measurement information, determining the drilling fluid flow rate in the non-full pipe diversion trench based on the flow rate measurement information, and determining the outlet flow rate of the non-full pipe diversion trench based on the target liquid level and the drilling fluid flow rate.
  11. 11. The diversion trench outlet flow monitoring system according to claim 10, wherein the liquid level measuring module comprises an ultrasonic sensing unit and an environment sensing unit, the ultrasonic sensing unit is used for measuring initial liquid level information, the environment sensing unit is used for measuring environment information, and the environment sensing unit and the ultrasonic sensing unit are arranged in the same area.
  12. 12. The system of claim 11, wherein the fluid level measurement module further comprises a filter assembly and a mud scraping assembly; the filtering component comprises a filtering cylinder, wherein the filtering cylinder is used for guiding the ultrasonic detection path to filter interference clutter and filtering mud in drilling fluid; The mud scraping component comprises a mud scraping device actuator, a mud scraping rod and a mud scraping plate, the mud scraping rod is detachably connected with the mud scraping plate, the mud scraping rod is in transmission connection with the mud scraping device actuator, the mud scraping plate is connected with the filter cylinder, and the mud scraping rod and the mud scraping plate are driven to reciprocate when the mud scraping device actuator works so as to scrape mud adhered to the filter cylinder.
  13. 13. The system of claim 10, wherein the flow rate measurement module comprises a contact body, a transmission portion, a torque sensing assembly; The contact body and the transmission part are integrally formed, the transmission part is in transmission connection with the torque sensor, and the contact body is used for sensing the impulse of drilling fluid in the outlet diversion trench and transmitting the sensed impulse to the torque sensor through the transmission part; The torque sensor is used for measuring torque variation of the transmission part.
  14. 14. An electronic device, comprising: A memory and a processor in communication with each other, the memory having stored therein computer instructions which, upon execution, cause the processor to perform the steps of the method of any of claims 1 to 8.
  15. 15. A computer storage medium storing computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 8.
  16. 16. A computer program product, characterized in that it comprises a computer program which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 8.

Description

Method for determining flow of outlet of diversion trench and flow monitoring system of outlet of diversion trench Technical Field The application relates to the technical field of drilling engineering, in particular to a method for determining flow of an outlet of a diversion trench and a system for monitoring the flow of the outlet of the diversion trench. Background With the trend of exploration and development to deep and complex stratum, ultra-deep well drilling is increased year by year, and the risk of overflow leakage is gradually increased. The conventional drilling site mainly adopts a mud tank liquid level monitoring method to carry out overflow alarm, and alarms after the tank volume rises by 1m3, but the method has certain hysteresis and certain error in manual judgment. Monitoring by a flow meter is not a second option for better monitoring of the outlet flow. From the aspect of outlet flow monitoring, the current monitoring of the outlet flow of the diversion trench on the drilling site mainly adopts a baffle flowmeter, and the flowmeter has the reading of percentage and cannot be quantitatively and only qualitatively measured, so that more inconvenience is brought, and the phenomenon of abnormality is easily caused by the adhesion of slurry for a long time. The mass flowmeter is a flowmeter with a good monitoring effect, the mass flowmeter is installed at the throttle manifold to monitor the flow, overflow can be found relatively early, but the conventional drilling outlet flow is in a non-full pipe state, and the mass flowmeter cannot be used for outlet monitoring. In the existing scheme, the ultrasonic liquid level gauge is adopted to measure the liquid level height, and then the Manning-chensinensis formula is adopted to calculate the flow velocity of the non-full pipe, so that the outlet flow of the non-full pipe diversion trench is obtained. The flow velocity in the method is obtained through theoretical formula calculation, and is greatly influenced by the drilling fluid, so that the flow velocity calculation is inaccurate. Aiming at the problem that the outlet flow of the non-full-pipe diversion trench cannot be accurately and reliably determined, no effective solution is proposed at present. Disclosure of Invention The embodiment of the application aims to provide a method for determining the flow of an outlet of a diversion trench and a system for monitoring the flow of the outlet of the diversion trench, so as to solve the problem that the flow of the outlet of a diversion trench which is not full of pipes cannot be accurately and reliably determined in the prior art. In order to solve the above technical problems, a first aspect of the present disclosure provides a method for determining an outlet flow of a diversion trench, including: acquiring environmental information in an outlet diversion trench and initial liquid level measurement information of drilling fluid; Determining a target liquid level of drilling fluid in the outlet diversion trench based on the environmental information and the initial liquid level measurement information; obtaining flow velocity measurement information of drilling fluid in an outlet diversion trench, wherein the flow velocity measurement information is obtained by measuring the impact force of the drilling fluid in the outlet diversion trench; Determining the flow rate of drilling fluid in the non-full pipe diversion trench based on the flow rate measurement information; and determining the outlet flow of the non-full pipe diversion trench based on the target liquid level and the drilling fluid flow rate. In some embodiments of the present description, the environmental information includes at least one of temperature information, humidity information. In some embodiments of the present disclosure, before obtaining the environmental information in the outlet diversion trench and the initial fluid level measurement information of the drilling fluid, the method further includes: Measuring output data of a liquid level measuring module corresponding to different environmental data under a fixed liquid level in an experimental environment; and constructing a mapping relation model between the environmental information and the output quantity of the liquid level measuring device based on the measured output data and the corresponding environmental data. In some embodiments of the present disclosure, determining a target level of drilling fluid in the outlet diversion trench based on the environmental information and the initial level measurement information comprises: Determining a liquid level correction coefficient based on the mapping relation model, the environmental information and the target environmental data; And correcting the initial liquid level measurement information based on the liquid level correction coefficient to obtain the target liquid level. In some embodiments of the present description, the liquid level correction factor is dete