At-the-bit mud loss treatment
US11578542B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Jul 5, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A while drilling mud loss treatment method includes providing a drilling tool main body with a through bore connected to an above arranged wired drill pipe string with a communication line to a topsides monitoring and control system, the drilling tool main body connected to a below arranged one or more drill collar sections with a lower of said drill collar sections connected to a drill bit, and drilling in a well. The main body is provided with an annular tank with a swellable sealant and the annular tank has a valve to an outlet to the through bore. A control system in the main body receives MWD sensor signals from an MWD sensor system and controls the valve having a valve actuator. The control system is, during drilling, running a monitoring and control algorithm using the signals as input for detecting an undesired mud loss state during drilling, and, if a mud loss state is detected, to command said valve actuator to open said valve upon detecting an undesired mud loss state, so as for ejecting said swellable sealant to said through bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.