Hole enlargement drilling device and methods for using same

US8875810B2 · kind B2 · utility

Assignee

• Baker Hughes Holdings LLC · US

Inventors

• Matthias Meister · Celle, DE
• Wolfgang E. Herberg · Waggum, DE
• Gunnar Bothman · Celle, DE
• Joachim Treviranus · Winsen (Aller), DE
• Carsten Freyer · Celle, DE
• Hans Oppelaar · Bergen, DE

Key dates

• Filing date: Jan 19, 2010
• Grant date: Nov 4, 2014
• Expiry date: Mar 17, 2031

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B47/12
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A bottomhole assembly (BHA) coupled to a drill string includes one or more controllers, and a hole enlargement device that selectively enlarges the diameter of the wellbore formed by the drill bit. The hole enlargement device includes an actuation unit that may move extendable cutting elements o the hole enlargement device between a radially extended position and a radially retracted position. The actuation unit may be responsive to a signal that is transmitted from a downhole and/or a surface location. The hole enlargement device may also include one or more position sensors that transmit a position signal indicative of a radial position of the cutting elements. In an illustrative operating mode, one or more operating parameters of the hole enlargement device may be adjusted based on one or more measured parameters. This adjustment may be done in a closed-loop or automated fashion and/or by human personnel.