Shock absorbing UBHO/pulser sub assembly with optional mud filter
US9644434B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2016 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shock sleeve is positioned above a UBHO sleeve, and both are received inside a substantially tubular sub collar. The shock sleeve is free to reciprocate with respect to the UBHO sleeve and sub collar. A mud pulse transmitter valve is received into the shock sleeve. The shock sleeve is interposed between upper and lower shock springs, which provide compensating compression spring bias to dampen the transmitter valve (as received in the shock sleeve) from vibration or shock forces experienced by the sub collar. At least one shock absorbing compression ring interposed between mating portions of the shock sleeve and transmitter valve also dampens the transmitter valve against vibration or shock. An optional mud filter received over the shock sleeve removes particulate matter from drilling fluid before it encounters the shock sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.