Mud pulser with high speed, low power input hydraulic actuator
US10077652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2012 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Dec 31, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of modulating information on pressure fluctuations transmitted via a tubular string can include applying pressure to a piston, thereby axially displacing the piston, axially displacing and rotating an intermediate sleeve in response to the piston displacement, rotating an output member in response to the axial displacement and rotation of the intermediate sleeve, and rotating a variable flow restrictor rotor relative to a stator, the rotor being connected to the output member. A mud pulser can include a variable flow restrictor, and an actuator which operates the flow restrictor and modulates information on pressure fluctuations produced by the flow restrictor, the actuator including a piston which displaces axially in response to a pressure differential, an intermediate sleeve which is both rotated and displaced axially by the piston, and an output member which is rotated by both rotation and axial displacement of the intermediate sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.