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Underbalanced drilling device and method for segmental real-time monitoring of gas-liquid two-phase flow

An underbalanced drilling and gas-liquid two-phase flow technology, which is applied in earthwork drilling, wellbore flushing, wellbore/well components, etc., can solve the problems of blowout and leakage coexistence, narrow density window, etc., and achieve equipment cost reduction, Avoiding complex working conditions and simplifying the effect of MPD equipment

Active Publication Date: 2018-11-16
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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Problems solved by technology

[0003] In order to solve the problem that the existing underbalanced drilling technology cannot realize the automatic real-time adjustment of the wellhead pressure, the present invention provides an underbalanced drilling device and control method for real-time monitoring of gas-liquid two-phase flow in segments. The underbalanced drilling device with segmental real-time monitoring of the two-phase flow flow can measure the gas-liquid two-phase flow at the outlet in real time, and adjust the wellhead pressure based on the change of the flow rate, which can effectively solve complex downhole problems such as narrow density window and co-existence of blowout and leakage

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  • Underbalanced drilling device and method for segmental real-time monitoring of gas-liquid two-phase flow

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Embodiment Construction

[0044] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0045] An underbalanced drilling device for segmental real-time monitoring of gas-liquid two-phase flow, comprising an underbalanced drilling system 101 and a choke manifold 102; the underbalanced drilling system 101 includes first pressure sensors connected in series on the first pipeline 20 4. The first manual plate valve 6, the hydraulic throttle valve 5, the mass flow meter 14, the underbalanced drilling system 101 also includes the control center 13 and the signal transceiver station 3, the first pressure sensor 4, the hydraulic throttle valve 5 and the The mass flowmeters 14 are all connected to the signal transceiver station 3, and the signal transceiver station 3 is connected to the con...

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Abstract

The invention provides an unbalanced drilling device and method with a gas-liquid two-phase flow flux segmented real-time monitoring function. The unbalanced drilling device with the gas-liquid two-phase flow flux segmented real-time monitoring function comprises an unbalanced drilling system (101) and a choke manifold (102). The unbalance drilling system (101) comprises a first pressure sensor (4), a first manual flat valve (6), a hydraulic drive throttle valve (5) and a mass flow meter (14) which are sequentially connected to a first pipeline (20) in series. The unbalanced drilling system (101) further comprises a control center (13) and a signal receiving and transmitting table (3). The unbalanced drilling device with the gas-liquid two-phase flow flux segmented real-time monitoring function carries out outlet gas-liquid two-phase flow segmented real-time measurement and adjusts pressure at a wellhead based on the flux change, and the downhole complex problems of a narrow density window, spray and leakage coexistence and the like can be effectively solved.

Description

technical field [0001] The present invention relates to the field of oil and natural gas drilling flow real-time monitoring and pressure automatic control technology, specifically an underbalanced drilling device for segmental real-time monitoring of gas-liquid two-phase flow flow, or an underbalanced drilling device for gas-liquid two-phase flow monitoring Drilling method. Background technique [0002] With the development of oil exploration to deep and complex formations, downhole complexities such as narrow density window and coexistence of blowout and loss have become the main drilling problems today. Underbalanced drilling technology is a powerful tool to solve the above problems, but the real-time segmental monitoring of gas-liquid two-phase flow rate and automatic real-time adjustment of wellhead pressure based on underbalanced drilling technology are the main problems at present. Contents of the invention [0003] In order to solve the problem that the existing un...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/08E21B21/14
CPCE21B21/08E21B21/14
Inventor 蒋宏伟周英操彭明佳郭庆丰赵莉萍张鑫屈宪伟康健门明磊
Owner BC P INC CHINA NAT PETROLEUM CORP
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