Apparatus and method for measuring while drilling
US8827006B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 2005 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/068
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus, system, and method for transmitting measurements while drilling are adapted for use with a drill string equipped with a mud motor. The drill string may comprise a plurality of interconnected drill pipe joints or a plurality of interconnected casing joints. The apparatus comprises a measurement-while-drilling tool adapted for placement in the drill string beneath the mud motor. The measurement-while-drilling tool has a system for transmitting telemetry signals, such as mud-pulse telemetry signals, upwardly through the mud motor and the drill string. In particular embodiments, the measurement-while-drilling tool has a system for transmitting mud-pulse telemetry signals upwardly through the mud motor and the drill string at frequencies below approximately 1 Hz, although other frequencies may be employed to advantage. The apparatus may further comprise a rotary steerable system for placement in the drill string beneath the mud motor. The rotary steerable system may be a point-the-bit system or a push-the-bit system. In particular embodiments, the rotary steerable system and the measurement-while-drilling tool are integrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.