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Oil gas well down-hole fault diagnosis system and method

A fault diagnosis system and technology for oil and gas wells, which are applied in the automatic control system of drilling, drilling equipment, earth-moving drilling, etc., and can solve the problems of limited application and poor real-time performance.

Inactive Publication Date: 2015-03-25
CHANGZHOU UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: aiming at the shortcomings of the existing downhole fault diagnosis system, such as poor real-time performance and limited application, the present invention provides a multifunctional downhole fault diagnosis system for oil and gas wells with strong real-time performance and for drilling engineering and Its diagnostic method

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  • Oil gas well down-hole fault diagnosis system and method
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  • Oil gas well down-hole fault diagnosis system and method

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Embodiment Construction

[0049] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the present invention, so they only show the configurations related to the present invention.

[0050] Such as figure 1 As shown, the drill string 3 is supported by a drill floor and a derrick 5, and the drill floor includes a first-floor drill floor 4 at the bottom of the derrick and a second-floor platform 9 in the middle, and the drilling pump 17 is connected with a drilling pump pipeline , the drilling pump pipeline includes a discharge pipeline 18 and a suction pipeline 25, the discharge pipeline 18 is connected to the water hose 21 through the ground manifold 23, and the riser 19 communicated with the ground manifold 23, the The suction pipeline 25 is connected to the mud pool 14, the water hose is connected to the faucet 11, and the standpipe 19 is fixedly...

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Abstract

The invention relates to an oil gas well down-hole fault diagnosis system and method. The diagnosis system is provided with a well drilling liquid inlet flow sensor, a well drilling liquid outlet flow sensor, a pressure sensor, a multi-channel signal collecting and sending device, a multi-channel signal receiving device and a computer system. The well drilling liquid inlet flow sensor is fixed on a ground manifold or a stand pipe. The well drilling liquid outlet flow sensor is fixed at a well drilling liquid backflow pipe or a mud ditch at a well opening of an oil gas well. The pressure sensor is arranged on the stand pipe. The multi-channel signal collecting and sending device is arranged on a drilling table of a well frame. Down-hole fault forecasting, locating and quantification diagnosis can be achieved, the accuracy and the identifying effect of fault diagnosis are greatly improved, changing of well drilling liquid flow and pressure is grasped timely and accurately, early-stage diagnosis of well leakage, well kicking and drilling rig washout is achieved, cost is low, mounting is convenient, a mounting position is reasonable, and the safety factor is high.

Description

technical field [0001] The invention relates to the technical field of oil drilling equipment, in particular to an oil and gas well downhole fault diagnosis system and a diagnosis method thereof. Background technique [0002] During the drilling process, if the downhole failures are not timely and accurately predicted, it may cause downhole complex situations or accidents and suffer huge economic losses. Downhole faults mainly include lost circulation, well kick, drilling tool leakage, wellbore instability and so on. Because of the frequent occurrence and seriousness of lost circulation, well kick, drilling tool leakage, wellbore instability and other accidents, scholars at home and abroad have carried out a lot of theoretical and experimental explorations. [0003] Integrated mud logging technology is a comprehensive field logging technology developed on the basis of geological logging, which integrates geological observation and analysis while drilling, gas detection, dri...

Claims

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Application Information

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IPC IPC(8): E21B44/00
CPCE21B44/00
Inventor 吕苗荣金育琦杨超高胜南林卫旺
Owner CHANGZHOU UNIV
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