Borehole fluid-pulse telemetry apparatus and method
US9334725B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2013 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Dec 30, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A fluid pulse generator for use in a drill string comprises an elongate obstruction member mounted in a fluid passage for driven pivoting about a pivot axis transverse to the fluid passage, obstruction of the fluid passage by the obstruction member being variable in relation to pivotal position of the obstruction member. Telemetry signals can be transmitted along the drill string by driven pivoting of the obstruction member, to generate data pulses in drilling fluid in the drill string. Pressure-locking of the obstruction member in a maximally obstructive position can be counteracted by provision of a bypass arrangement to allow bypass flow at a leading end of the obstruction member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.