Apparatus and methods for determining in real-time efficiency extracting gas from drilling fluid at surface

US10781649B2 · kind B2 · utility

Assignee

• Baker Hughes, a GE company, LLC · US

Inventors

• Brian Ochoa · Hannover, DE
• Nicklas Jeremias Ritzmann · Celle, DE

Key dates

• Filing date: Nov 12, 2015
• Grant date: Sep 22, 2020
• Expiry date: Aug 10, 2036

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B21/065
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In one aspect, a method for determining amount of selected gas extracted from a drilling fluid during drilling of a wellbore and total amount of gas present in such fluid is disclosed, that in one embodiment may include; flowing the drilling fluid through a gas trap at a constant flow rate; extracting the selected gas released from the drilling fluid flowing through gas trap and determining therefrom the amount of the extracted gas from the drilling fluid; trapping a constant volume of the drilling fluid in the gas trap; extracting the selected gas released from the constant volume and determining therefrom the total amount of the selected gas present in the drilling during drilling of the wellbore. The method further includes determining the efficiency of the gas extraction process from the amount of the selected gas extracted from the fluid flowing through the gas tap and the total amount of the gas in the constant volume.