Drilling well underground kick processing method and device with self-feedback adjustment
US11773709B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2022 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | May 26, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling well underground kick processing method and device are described. The method includes: collecting actual logging data ztat current moment; predicting, according to a filtering estimation value {circumflex over (x)}t−1 of logging data at previous moment and the actual logging data zt at the current moment, a state prediction value {circumflex over (x)}−t and a filtering estimation value {circumflex over (x)}t of the logging data at the current moment under the normal drilling condition by using a Kalman filter; inputting a prediction error, an innovation vector and a Kalman filtering gain matrix Kt at the current moment into a pre-trained BP neural network; obtaining a corrected filtering estimation value {circumflex over (x)}1t of the logging data at the current moment according to a filtering residual and the filtering estimation value {circumflex over (x)}t of the logging data at the current moment; and determining that a kick occurs under the condition that the corrected filtering estimation value {circumflex over (x)}1t is not matched with the actual logging data zt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.