System of detecting state and failure diagnosis of oil well drill pump

A technology of fault diagnosis and state detection, which is applied to the automatic control system of drilling, drilling equipment, earthwork drilling and production, etc., to achieve the effect of high power, harsh working conditions and high pressure

Inactive Publication Date: 2006-01-11
JIANGSU POLYTECHNIC UNIVERSITY +1
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Problems solved by technology

[0006] To sum up, there is still no mature drilling pump condition moni...

Method used

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  • System of detecting state and failure diagnosis of oil well drill pump
  • System of detecting state and failure diagnosis of oil well drill pump
  • System of detecting state and failure diagnosis of oil well drill pump

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Embodiment Construction

[0014] This system will be further described below with reference to the accompanying drawings. The invented software system, aiming at the actual conditions of the power end and fluid end of the drilling pump, combined with the experimental research work, adopts different signal analysis and processing methods on a complete vibration test platform (see Figure 1). Specifically:

[0015] For the power end, the method shown in Figure 2 will be adopted for processing and analysis. Its purpose is to reduce noise interference and make the fault characteristic spectrum line stand out obviously, so the comprehensive analysis method of spectrum analysis, resonance demodulation and fuzzy identification is adopted. By analyzing the amplitude domain and frequency domain of the resonant demodulated wave, the magnitude and type of the fault can be determined. However, because there is a certain gap between the actual operating conditions of the bearing and the assumed conditions in the t...

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Abstract

The drilling pump is a reciprocating piston pump, generally adopts three-cylinder single-acting mode, and is a key equipment of petroleum drilling machine and can be used for pumping drilling liquor into downhole. According to the structure of drilling pump and monitoring object the acceleration measuring points are respectively distributed on the pump head, crosshead position and every bearing seat of power end, and an eddy current sensor is mounted for monitoring phase signal, then the acceleration signal can be respectively transferred into charge amplifier, passed through interface box and inputted into computer to make processing so as to implement drilling pump condition detection and fault diagnosis.

Description

technical field [0001] The present invention provides a novel state detection and fault diagnosis system for three-cylinder single-acting reciprocating pumps used in petroleum drilling. State monitoring and fault discrimination of the end (including piston, cylinder liner, suction and discharge valve). Background technique [0002] An oil drilling rig is generally equipped with two drilling pumps, and modern drilling pumps are generally three-cylinder single-acting reciprocating pumps. The drilling pump is the key equipment of the oil drilling circulation system. It is used to pump the "blood" of drilling downhole---drilling fluid, so it is called the "heart" of the drilling rig. The pressure and displacement of the drilling pump are closely related to the drilling process, so its working status directly affects whether the drilling work can be carried out normally, and affects the safety, efficiency, cost and quality of the drilling work. During work, the pulleys, gears, ...

Claims

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Application Information

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IPC IPC(8): E21B44/00
Inventor 裴峻峰王学良曾洪图齐明侠王灵奎张志毅白康生万广伟张锁龙王留贵
Owner JIANGSU POLYTECHNIC UNIVERSITY
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