公开(公告)号：US11008830B2

公开(公告)日：2021-05-18

申请号：US16529694

申请日：2019-08-01

Applicant: PetroChina Company Limited

Inventor： Gaixing Hu ,  Hongjun Lu ,  Bin Yao ,  Yafeng Ju ,  Jiuzheng Yu ,  Lingzhi Yang ,  Fuwei Bi ,  Zijian Wang ,  Loulou Li

IPC: E21B43/20 ,  E21B34/06 ,  E21B47/10 ,  E21B43/14 ,  E21B33/12

Abstract: The present invention provides a stratified waterflooding apparatus, which comprises: a water distribution unit, which comprises two water distributors, the water distributor having an inner side wall and an outer side wall, the inner and outer side walls forming a first annular cavity therebetween and being respectively provided with a water inlet and a water outlet which are communicated with the first annular cavity, the first annular cavity accommodates a driving mechanism and an adjustable blocking member, the adjustable blocking member having a first operating position in which it blocks the water inlet or the water outlet and a second operating position in which it releases the blocking of the water inlet and the water outlet; and a controller in communication connection with the driving mechanism. The stratified waterflooding apparatus can realize intelligent and automatic regulation of an aperture of the water distributors in the stratified waterflooding process.

公开(公告)号：US10890059B2

公开(公告)日：2021-01-12

申请号：US16175620

申请日：2018-10-30

Applicant: PetroChina Company Limited

Inventor： Lingzhi Yang ,  Yafeng Ju ,  Bin Yao ,  Jiuzheng Yu ,  Bilin Luo ,  Fuwei Bi ,  Zijian Wang ,  Yanqing Liu

IPC: E21B43/20

Abstract: A layered water injection system and a layered water injection method. The system comprises: a ground water injection valve group configured with an intelligent control valve, for receiving a water injection control instruction sent by a remote control center, and for converting the water injection control instruction into a switching action of the intelligent control valve to control water flow pressure fluctuation in a water injection string, so as to form a first pressure wave code in the water injection string; a water distributor for collecting the first pressure wave code, interpreting the first pressure wave code as a corresponding water outlet switch instruction, and performing layered water injection control according to the water outlet switch instruction. The embodiments of the application can improve the automation level of layered water injection and the reliability of layered water injection control.