Statistical approach to incorporate uncertainties of parameters in simulation results and stability analysis for earth drilling
US11598195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2014 |
| Grant date | Mar 7, 2023 |
| Priority date | — |
| Expiry date | Jun 22, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for estimating a probability of a drilling dysfunction or a drilling performance indicator value occurring includes entering drilling-related data having a probability distribution into a mathematical model of a drill string drilling a borehole penetrating the earth and entering drilling parameters into the model for drilling the borehole. The method further includes performing a plurality of drilling simulations using the model, each simulation providing a probability of the drilling dysfunction occurring or a probability of a drilling performance indicator value occurring with associated drilling parameters used in the simulation, selecting a set of drilling parameters that optimizes a drilling objective using the probabilities of the drilling dysfunction occurring or the probabilities of a drilling performance indicator value occurring; and transmitting the selected set of drilling parameters to a signal receiving device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.