公开(公告)号：US20230393300A1

公开(公告)日：2023-12-07

申请号：US18249155

申请日：2021-10-15

申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  SINOPEC PETROLEUM ENGINEERING TECHNOLOGY SERVICE CO., LTD ,  SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD ,  SINOPEC MATRIX CORPORATION ,  GEOSTEERING & LOGGING RESEARCH INSTITUTE, SINOPEC MATRIX CORPORATION

发明人： Luyang DING ,  Ningning YANG ,  Haiquan TANG ,  Zhen YANG ,  Nan LIN ,  Mingquan HUANG ,  Qinglong LIU ,  Quanjin YANG ,  Xiaolin ZHANG ,  Zhiyong ZHANG ,  Chuntian HAN ,  Hai MA ,  Xiaohui CUI ,  Chao LU ,  Xin CHENG

IPC分类号： G01V5/12 ,  G06F17/16 ,  E21B47/12

CPC分类号： G01V5/12 ,  G06F17/16 ,  E21B47/12

摘要： A multi-sector data correction method for gamma imaging while drilling includes the steps of: (a) dividing each gamma imaging sector into a plurality of counting zones; (b) counting a number of valid counting pulses for each counting zone at a predetermined time interval during MWD; (c) constructing a plurality of measurement vectors based on a value of recording times of each counting zone; (d) establishing a correction matrix with a conditional number less than a set value through an optimization algorithm; and (e) calculating a gamma intensity of each measured sector with the plurality of measurement vectors and the correction matrix as constructed, so as to complete the correction on the measurement data of each measured sector for each predetermined time interval. This method eliminate problems such as rotational measurement distortion of the gamma imaging while drilling tool and improve the accuracy of calculating the formation dip angle.

公开(公告)号：US20230383605A1

公开(公告)日：2023-11-30

申请号：US18248907

申请日：2021-10-15

申请人： China Petroleum & Chemical Corporation ,  Sinopec Petroleum Engineering Technology Service Co., Ltd ,  Sinopec Shengli Petroleum Engineering Co., Ltd ,  Sinopec Matrix Corporation ,  Geosteering & Logging Research Institute, Sinopec Matrix Corporation

发明人： Qingming MA ,  Jieran ZHU ,  Ningning YANG ,  Guangquan LI ,  Yufeng LI ,  Nan LIN ,  Haiquan TANG ,  Haiyang DU ,  Chao LU

IPC分类号： E21B7/06 ,  E21B47/022 ,  E21B17/05 ,  E21B41/00

CPC分类号： E21B7/067 ,  E21B47/022 ,  E21B17/05 ,  E21B41/0085

摘要： A steerable drilling device has an outer tube extending along a longitudinal axis; a drill bit joint inserted into said outer tube, a lower end of said drill bit joint extending out of a lower end of said outer tube for connection to a drill bit; a joint drive mechanism, provided in said outer tube and configured to drive said drill bit joint to swing relative to the longitudinal axis; and a lower connection mechanism. The lower connection mechanism has a connection body connected to said joint drive mechanism in such a manner that said joint drive mechanism is non-rotatable with respect to said connection body, a first centralizer arranged between said connection body and said outer tube, a circuit system arranged in said connection body and configured to provide an electrical signal to said joint driving mechanism, and an attitude sensor arranged in said connection body.