Method and system for predicting performance of a drilling system having multiple cutting structures
US8274399B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2007 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Aug 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B13/048
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A drilling system has multiple cutting structures, including a bit and one or more secondary cutting structures. A method balances the rate of penetration of the drilling system and the wear on the cutting structures by controlling weight on bit and RPM. The method includes calculating a predicted rate of penetration for the bit, using in the calculation the current predicted wear on the bit and the properties of the rock to be penetrated by the bit. The method includes calculating a predicted rate of penetration for at least one of the one or more secondary cutting structures, using in the calculation the current predicted wear on the secondary cutting structure and the properties of the rock to be penetrated by the secondary cutting structure. The method includes determining the slowest rate of penetration among those calculated for the bit and at least one the one or more secondary cutting structures. The method includes calculating the weight on bit and RPM for each of the bit and at least one of the one or more secondary cutting structures to substantially match the determined slowest rate of penetration. The method includes summing the calculated weights on bit to calculate a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.