INTELLIGENT REAMER FOR ROTARY/SLIDING DRILLING SYSTEM AND METHOD

摘要

A downhole intelligent reamer controller detects the difference between rotary drilling and sliding drilling, responds appropriately and quickly to multiple changes between rotary drilling and sliding drilling that may occur several times each stand of pipe. Additional controls prevent deployment of reamer members at inappropriate times such as when drilling out cement, testing, and running in and out of the wellbore. In one embodiment, a separate modular control sub is disclosed that may be utilized with and/or removably secured to an expandable reamer and/or other types of downhole tools.

主权项

1. An electronic reamer connectable to a downhole drilling assembly, comprising:
a reamer body section; one or more reamer members mounted to said reamer body section for selective movement between a radially inwardly position and a radially extended position from said reamer body section; an opening and closing mechanism operatively connected to said reamer members to move said reamer members between said radially inwardly position and said radially extended position; a rotation sensor; an electronic control unit operably connected to said rotation sensor and to said opening and closing mechanism, said electronic control unit being operable for placement into a first mode and a second mode, whereby in said first mode said electronic control unit is programmed to move said reamer members to said radially extended position when said electronic control unit detects rotating drilling utilizing said rotation sensor and to said radially inwardly position when said electronic control unit detects sliding drilling, and whereby in said second mode said electronic control unit is programmed to maintain said reamer members in said radially inwardly position regardless of rotation.