New methods of eliminating downhole WOB measurement error owing to temperature variation and well pressure differential
New methods of eliminating downhole WOB measurement error owing to temperature variation and well pressure differential
复制标题
消除因温度变化和井压差引起的井下钻压测量误差的新方法
DOI：
10.1016/j.petrol.2018.08.073
复制
发表时间：
2018-12
影响因子：
--
通讯作者：
Ren K.
中科院分区：
文献类型：
--
作者：
Wang C.;Liu G. H.;Li J.;Zhang T.;Jiang H. L.;Ling X.;Ren K.
井下钻头重量(WOB)测量传感器由于温度变化和井下压差的影响，其读数会产生很大的误差。为了提高井下钻压测量的精度，通过理论推导、室内实验和现场实验，研究了温度变化和压差对钻压测量的影响。基于热弹性材料的本构方程和应变计的应变理论，推导了温度变化引起的误差方程。通过实验室实验，对传统的温度补偿法和本文提出的新的温度补偿法进行了比较。实验结果表明，新的温度补偿方法在消除温度变化的影响方面具有较好的效果。传统的钻压修正方法消除压差影响的缺点是没有考虑钻具马达内的压降。基于流动流体动量方程和浮体理论，提出了一种新的钻压修正方法。现场实验结果表明，常规校正方法的测量误差可达80 kN。本文的工作对井下钻压测量具有一定的指导意义。
The downhole weight on bit (WOB) measurement sensor can produce significant inaccuracies in its readings owing to the effects of temperature variation and well pressure differential. To improve the accuracy of downhole WOB measurement, the impacts of temperature variation and pressure differential on WOB measurement were studied via theoretical derivations, laboratory experiments, and field experiments. Based on the constitutive equations of thermoelastic materials and the strain theory of strain gauge, the equation of error induced by temperature variation was deduced. Through laboratory experiments, the conventional temperature compensatory method, and the new compensatory temperature method proposed herein were compared. The experimental results show that the proposed new temperature compensatory method performed better in eliminating the effects of temperature variation. The shortcoming of the conventional WOB correction method for eliminating the pressure differential impact is that it does not consider the pressure drop in the drill motor. A new WOB correction method is proposed based on the momentum equation of flowing fluid and floating body theory. The field experimental results indicate that the measurement error of the conventional correction method could reach up to 80 kN. The work presented herein can serve as guidance for the downhole WOB measurement.
登录
查看更多内容
影响因子：
4.6
作者：
G. Hareland;A. Wu;L. Lei
通讯作者：
G. Hareland;A. Wu;L. Lei
DOI：
10.12783/dtetr/3rd/amma2017/14763
发表时间：
2017-10
期刊：
DEStech Transactions on Engineering and Technology Research
影响因子：
--
作者：
Hailong Jiang;Gong-hui Liu;Jun Li;Xi-hui Hu;Geng Tang;Jian-hua Guo;Quan Cao;Bin Li
通讯作者：
Hailong Jiang;Gong-hui Liu;Jun Li;Xi-hui Hu;Geng Tang;Jian-hua Guo;Quan Cao;Bin Li
DOI：
10.2118/25456-ms
发表时间：
1993
期刊：
--
影响因子：
--
作者：
T. Reed;A. Pilehvari
通讯作者：
T. Reed;A. Pilehvari
影响因子：
--
作者：
Yang Liu;Tianshou Ma;Ping Chen;Chuan Yang
通讯作者：
Yang Liu;Tianshou Ma;Ping Chen;Chuan Yang
影响因子：
0.6
作者：
Ma Tian-shou;Chen Ping
通讯作者：
Ma Tian-shou;Chen Ping