Remote intelligent active drilling pressure control system and method

A pressure control and intelligent technology, which is applied in the direction of comprehensive factory control, earthwork drilling and flushing, etc., can solve the problems of back pressure compensation device not satisfying long-term grouting, high cost of hydraulic control system, large fluctuation of pressure control, etc. , to achieve the effects of easy and precise control of wellhead back pressure, simple structure and stable outlet flow

Active Publication Date: 2022-05-24
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention can also solve the problem that the current precision MPD occupies a large area, greatly reduce the operating cost of MPD, and is beneficial to the popularization and application of MPD technology
The invention can also overcome the problems that the back pressure compensation device does not meet the requirements of long-term grouting, frequent failures, unstable outlet flow, and the need to be equipped with a special generator
The present invention can also overcome the problems of high cost, slow response speed, and large pressure control fluctuations of the hydraulic control system of the ground automatic throttling control system, and can realize intelligent remote closed-loop control of drilling wellbore pressure

Method used

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  • Remote intelligent active drilling pressure control system and method
  • Remote intelligent active drilling pressure control system and method
  • Remote intelligent active drilling pressure control system and method

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Experimental program
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Effect test

Embodiment 1

[0080] figure 2 A remote intelligent active drilling pressure control system according to an embodiment of the present invention is schematically shown.

[0081] like figure 2 As shown, a remote intelligent active drilling pressure control system described in this embodiment includes a ground multi-parameter online monitoring system, a rotary blowout preventer 1, a ground simple throttling control manifold, a wellhead back pressure compensation manifold, a graded The injection device 62 , the downhole storage pressure measurement device 91 , the drilling hydraulics calculation system 30 , the managed pressure drilling intelligent control platform 87 , and the remote monitoring and control system 88 .

[0082] The described remote intelligent active drilling pressure control system is not equipped with a gas-liquid separator alone, but uses the gas-liquid separator 15 that is standard for the well team.

[0083] The ground multi-parameter online monitoring system includes: ...

Embodiment 2

[0138] An embodiment of the present invention is a remote intelligent active drilling pressure control method. The described drilling pressure control method uses the aforementioned remote intelligent active drilling pressure control system, and the specific steps are as follows:

[0139] S1: Pre-input drilling parameters and engineering calculation data to the MPD intelligent control terminal before drilling.

[0140] The drilling parameters include well type, well type, well depth, well body structure, wellbore trajectory, displacement, WOB, rotational speed, formation lithology, drilling fluid density and viscosity, and reservoir parameters, etc. The data source is input in advance. in drilling engineering design. The engineering calculation data includes formation three pressure profiles (pore pressure, collapse pressure, leakage pressure), fracture parameters (development degree, fracture density, fracture width, etc.), plugging parameters, etc. The pre-input data comes ...

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Abstract

The invention discloses a remote intelligent active drilling pressure control system and method. The system comprises a drilling pump, a rotary blowout preventer (1), a ground simple throttling control manifold, a wellhead back pressure compensation manifold (12), a graded filling device, an underground storage type pressure measuring device (91), a ground multi-parameter online monitoring system, a drilling hydraulic calculation system (30), a pressure control drilling intelligent control platform (87) and a remote monitoring and control system (88). The invention provides a shaft pressure control thought of'plugging and control combination ', active control of the shaft pressure is realized by circularly plugging while drilling and improving the pressure resistance of the stratum, the'well drilling safety density window' of the stratum is effectively widened, the requirement on the pressure control precision of shaft pressure control equipment is reduced, and the well drilling safety density window is effectively expanded. The problem that a conventional pressure-controlled drilling technology cannot deal with the situation that a drilling safety density window of a stratum is extremely narrow or even zero is solved, and the application range of the pressure-controlled drilling technology is widened.

Description

technical field [0001] The invention relates to the field of drilling for oil and natural gas exploration and development, in particular to a remote intelligent active drilling pressure control method and system. Background technique [0002] With the deepening of oil and gas exploration and development, the field of exploration and development is gradually turning to complex formations such as deep, deep water and unconventional formations. Generally, the "safe density window" of complex formations is relatively narrow, and a series of complex drilling problems such as well kick, lost circulation, and sticking are prone to occur when conventional drilling techniques are applied. The technical bottleneck of exploration and development. [0003] Managed pressure drilling technology (MPD) is a new drilling technology developed in recent years. Its core is to control the back pressure of the wellhead in real time through the corresponding equipment system, so as to indirectly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/08E21B33/13
CPCE21B21/08E21B33/13Y02P90/02E21B2200/20E21B33/06E21B44/00
Inventor 李皋李红涛陈一健肖东蒋俊夏文鹤李永杰
Owner SOUTHWEST PETROLEUM UNIV
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