Real time flow analysis methods and continuous mass balance and wellbore pressure calculations from real-time density and flow measurements
US11242744B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2020 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Aug 10, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Embodiments of this disclosure confirm a leak and determine a depth of the leak in a well of a drilling system. The drilling system include a circulating fluid and a fluid caliper having a density contrast relative to a density of the circulating fluid. Fluid mass flow and fluid density data are continually collected by an inlet and outlet side flow measurements. A measured surface pressure, a measured downhole pressure, a user-defined managed depth window, and a target equivalent circulating density at the user-defined managed depth window are inputted to a microprocessor. The microprocessor adjusts the fluid density data for temperature and pressure; calculates a mass flow balance and a wellbore pressure; compares the measured density and mass flow in with the measured density and mass flow out; and determines, based upon the comparing, the presence of the leak and the depth of the leak.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.