公开(公告)号：WO2013130236A3

公开(公告)日：2013-09-06

申请号：PCT/US2013/025192

申请日：2013-02-07

Applicant: WEATHERFORD/LAMB, INC.

Inventor： TEODORESCU, Sorin G. ,  RING, Lev

IPC: E21B41/00 ,  H02J17/00

Abstract: Methods and apparatus are provided for continuously powering tools downhole for extended periods of time, such as for the life of the producing well. Batteries may power the downhole tools, but traditionally, the batteries may last up to 2 years, and in some cases, up to 5 years may be reached with an optimized data sampling rate and power management scheme. After that time, operations may be halted temporarily for replacing the batteries. According to embodiments of the present invention, in contrast, rechargeable batteries 204 may be utilized downhole to provide power to operate the tools, and rather than halting operations and retrieving the rechargeable batteries 204 to the surface for recharging, reserve batteries 208/210 may be used for recharging the rechargeable batteries 204. In many cases, these well tools may be designed to operate for a long period of time (e.g., around 10-20 years), depending on the life of the producing well.

公开(公告)号：EP2820237A2

公开(公告)日：2015-01-07

申请号：EP13705886.3

申请日：2013-02-07

Applicant: Weatherford/Lamb, Inc.

Inventor： TEODORESCU, Sorin G. ,  RING, Lev

IPC: E21B41/00 ,  H02J17/00

CPC classification number: H02J7/0054 ,  E21B41/0085 ,  H01M6/385

Abstract: Methods and apparatus are provided for continuously powering tools downhole for extended periods of time, such as for the life of the producing well. Batteries may power the downhole tools, but traditionally, the batteries may last up to 2 years, and in some cases, up to 5 years may be reached with an optimized data sampling rate and power management scheme. After that time, operations may be halted temporarily for replacing the batteries. According to embodiments of the present invention, in contrast, rechargeable batteries may be utilized downhole to provide power to operate the tools, and rather than halting operations and retrieving the rechargeable batteries to the surface for recharging, reserve batteries may be used for recharging the rechargeable batteries. In many cases, these well tools may be designed to operate for a long period of time ( e.g., around 10-20 years), depending on the life of the producing well.