公开(公告)号：US11649714B1

公开(公告)日：2023-05-16

申请号：US17714164

申请日：2022-04-06

Applicant: Southwest Petroleum University

Inventor： Yan Chen ,  Yuchuan An ,  Xiangchao Shi ,  Yu Yi ,  Yang Wang ,  Zhicheng Li ,  Gaocheng Feng ,  Yangbing Li ,  Ping Li ,  Yuan Zhong ,  Ming Xian ,  Hu Deng ,  Yuming Wang ,  Yuehao Liu

IPC: E21B45/00 ,  G06F30/27

CPC classification number: E21B45/00 ,  G06F30/27

Abstract: A method for predicting and optimizing an ROP for oil and gas drilling based on Bayesian optimization includes: acquiring raw drilling data according to a preset sampling period, constructing an initial sample data set based on the raw drilling data, constructing an ROP prediction model based on the initial sample data set, and predicting an ROP at a next sample point through a Gaussian process regression based on the ROP prediction model. The present invention realizes rapid analysis of historical drilling data and accurate prediction of an ROP range at a sample point in a feasible domain. The method can obtain an optimized ROP and an optimized engineering parameter through Bayesian optimization, and obtain an engineering parameter corresponding to an optimal ROP. The method has few restrictions on the drilling engineering parameter and the raw formation parameter, improves prediction accuracy, and avoids the problem of blurred parameter value boundaries.

公开(公告)号：US10233694B2

公开(公告)日：2019-03-19

申请号：US15323104

申请日：2015-06-23

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Wei Li ,  Hongxiang Lei ,  Qingyou Liu ,  Shihong Xiao ,  Xu Si ,  Tieshan Zhang ,  Qing Tu ,  Xiao Tan ,  Fanyao Jin ,  Xingming Wang ,  Yuan Zhong ,  Hang Li ,  Jianchuan Wu ,  Dengwei Li

IPC: E21B7/06 ,  E21B7/04 ,  E21B34/06

Abstract: A rotation guidance apparatus belonging to the technical field of oil drilling equipment. An end part of a lower connector has a ball-socketed ball-joint rod, and a drill bit is connected to the ball-socketed ball-joint rod. Several circumferentially and evenly distributed piston holes are provided in a side wall of the lower connector, wherein a piston matches each piston hole and a piston rod connected to the piston is movably connected to the ball-socketed ball-joint rod. An eccentrically-placed valve core is connected to a controller provided in an upper connector, wherein a working face of the eccentrically-placed valve core is opposite to the piston holes and rotation of the eccentrically-placed valve core makes the pistons in the piston holes move to control the rotation guidance of the ball-socketed ball-joint rod.