Compensator, thrust bearing and torsion bar for servo-driven mud pulser
US10294781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2018 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Jun 4, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/066
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pressure compensator assembly is deployed in a servo-driven mud pulser. The assembly includes a generally tubular compensator sleeve that expands and contracts in a radial direction in order to compensate for pressure differentials across the compensator sleeve. A thrust bearing arrangement is also deployed in a servo-driven mud pulser, the thrust bearing arrangement designed to protect the servo motor from reactive energy caused by servo motor stalls as the motor changes direction of rotation. A torsion bar is deployed in a drill string to protect fragile components and electronics in the drill string by absorbing and smoothing out torsion spikes in the drill string arising from stick-slip events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.