Method, system and equipment for measuring vibration of drilling tool while drilling
A technology of vibration measurement and measurement method, applied in measurement devices, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as downhole drilling tool measurement, and achieve the effect of real-time monitoring
Pending Publication Date: 2022-07-05
BC P INC CHINA NAT PETROLEUM CORP +1
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[0004] In the prior art, the downhole vibration status is generally identified through experience and observation, or the vibration-related parameters of the downhole drilling tool are measured through the vibration accelerometer, but the parameters related to the lateral vibration of the downhole drilling tool are not measured.
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[0029] Hereinafter, the method, system, and device for measuring vibration while drilling of the present invention will be described in detail with reference to the exemplary embodiments.
[0030] In the prior art, the combination of accelerometers is mostly used to realize vibration signal acquisition, and obtain the measured value of the three-axis accelerometer. The physical expression of the measured value of the three-axis accelerometer is as follows:
[0031]
[0032] In the formula, X a is the measured value of radial acceleration along the drill string, m / s 2 ;Y a is the measured value of tangential acceleration along the drill string, m / s 2 ; r is the eccentric distance, m; ω is the downhole speed of the drill string, rpm; Z a is the measured value of the axial acceleration along the drill string, m / s 2 ; a xc and a yc are the two orthogonal components of the lateral acceleration, m / s 2 ; a zc is the axial acceleration, m / s 2 .
[0033] The lateral vibrat...
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The invention provides a vibration measurement method, system and equipment for a drilling tool while drilling, and the measurement method comprises the steps: carrying out the vibration measurement of an underground drilling tool through a vibration monitoring unit, and obtaining transverse vibration data and axial vibration data; carrying out filtering processing on the transverse vibration data by utilizing wavelet transform so as to separate and remove a low-frequency trend term introduced due to rotation of the drill string; determining the acceleration measurement value Xa along the radial direction of the drill string and the acceleration measurement value Ya along the tangential direction of the drill string as two orthogonal components axc and ayc of the transverse acceleration respectively; and according to the radial acceleration measurement value Xa along the drill column and the tangential acceleration measurement value Ya along the drill column, the transverse vibration acceleration aat of the drilling tool is determined. According to the invention, the transverse vibration parameters of the drilling tool can be accurately measured, so that the vibration state of an underground drill column can be monitored in real time, and engineering technicians are assisted to realize safe drilling construction.
Description
technical field [0001] The present invention relates to the technical field of measurement while drilling, and in particular, to a method for measuring vibration of drilling tools while drilling, a vibration measurement system for drilling tools while drilling, a computer device, and a computer-readable storage device storing a computer program medium. Background technique [0002] During the drilling process, the drill string is used to send the drill bit to the bottom of the wellbore and transmit power to the drill bit. The drill bit's teeth, cutting edges and jets break the rock to form the wellbore. Due to the intermittent contact of the drill bit teeth with the formation or the intermittent breaking of the rock, the drill bit and the drill string are driven to vibrate. Under some well conditions, the state of drill string vibration is extremely complex, and the alternating stress and amplitude in the drill string are quite large, resulting in drill string fracture or s...
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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 刘伟冯思恒连太炜陈东张德军汪洋郑海波杨瑞帆张萍
Owner BC P INC CHINA NAT PETROLEUM CORP