Mud pump and vacuum gas extraction system

Patent metadata

Field	Value
Publication number	US-10463989-B2
Application number	US-201816050237-A
Country	US
Kind code	B2
Filing date	Jul 31, 2018
Priority date	Mar 11, 2016
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

Methods for extracting hydrocarbon gas utilize a vacuum chamber with a mud chamber portion that is expandable and contractible. Gas is extracted at vacuum pressures.

First claim

What is claimed is:

1. A method of extracting hydrocarbon gas from hydrocarbon-bearing drilling mud, the method comprising the steps of:
flowing hydrocarbon-bearing drilling mud into a mud chamber portion of a degassing device, the mud chamber portion coupled to a gas valve and a mud valve;
generating with the mud chamber portion a suction stroke during which the gas valve is closed and the mud valve is closed, wherein the step of generating with the mud chamber portion a suction stroke comprises rotating a rotor within a degassing chamber and wherein the rotating the rotor within the degassing chamber results in two reciprocating cycles for degassing of the hydrocarbon-bearing drilling mud in the mud chamber portion and a separate mud chamber portion; and
generating with the mud chamber portion a discharge stroke during which the gas valve is open and the mud valve is closed.

2. The method of claim 1 further comprising the step of analyzing extracted gas comprises using a device selected from the group consisting of a mass spectrometer or a gas chromatograph.

3. The method of claim 1 further comprising the step of removing the extracted hydrocarbon gas from the mud chamber portion through the gas valve.

4. The method of claim 3 further comprising the steps of:
flowing the extracted hydrocarbon gas to a gas sample line; and
flowing the extracted hydrocarbon gas through the gas sample line to a gas collection trap.

5. The method of claim 1 further comprising the step of flowing the drilling mud from the mud chamber portion.

Assignees

• Baker Hughes A Ge Co Llc

Inventors

• Ochoa Brian

Classifications

• F04C14/24

  characterised by using valves controlling pressure or flow rate, e.g. discharge valves {or unloading valves}(F04C14/10 takes precedence) · CPC title

• B01D19/0036

  Flash degasification (the other groups take precedence) · CPC title

• E21B21/106

  Valve arrangements outside the borehole, e.g. kelly valves (valves specifically for maintaining circulation of drilling fluid while connecting or disconnecting tubular joints E21B21/019) · CPC title

• F04B7/00

  Piston machines or pumps characterised by having positively-driven valving · CPC title

• F04B53/10

  Valves; Arrangement of valves · CPC title