Schlumberger Technology Corporation

Chemsseddine Bouguetta

James Friedheim

Robert Bailey

Roger Wayne Matlock

Henry Lee Conn

Steven Philip Young

Bruno Lecerf

Dimitri M Khramov

Katerina V Newman

Stephen Cliffe

Kenneth Slater

Damian R Vickers

A device includes a housing having a bore formed axially therethrough. The housing includes a stop that protrudes radially inward proximate to a lower end of the housing. The device also includes a lower piston positioned in the bore. The lower piston is configured to move axially within the bore in response to a pressure differential across the lower piston. The lower piston is prevented from passing out through the lower end of the housing by the stop. The lower piston has a lower piston hole formed therethrough. The device also includes an upper piston positioned in the bore. The upper piston is configured to move axially within the bore in response to a pressure differential across the upper piston. The upper piston has an upper piston hole formed therethrough. The device is configured to receive a fluid in the bore, between the upper and lower pistons.

System and method for measuring properties of a fluid

A method of drilling a wellbore may include drilling the wellbore using a wellbore fluid that has rheological property values for 6 rpm, 10 minute gel, Yield Point, and/or 10 minute-to-10 second gel ratio that are +/20% of the mean values across a temperature range from 40&#xb0; F. to 300&#xb0; F.; and conditioning the wellbore with less than 2 hole volumes. The wellbore fluid may include an oleaginous external phase; a non-oleaginous internal phase; an amidoamine emulsifier stabilizing the non-oleaginous internal phase within the oleaginous external phase; at least two oil wetting agents; a rheology modifier; and a weighting agent having a d50 ranging from 5 to 10 &#x3bc;m.

Flat rheology wellbore fluids for generating clean wellbores

A method of drilling a wellbore includes pumping an oleaginous wellbore fluid into a wellbore, the oleaginous wellbore fluid including an oleaginous continuous phase; a non-oleaginous discontinuous phase; an emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase; an organophilic clay; a weighting agent; and a wetting agent having an HLB ranging from about 4 to 10.5 that it selected such that the oleaginous wellbore fluid has a 600 rpm dial value at 40&#xb0; F. of less than about 300 and a 10 minute gel strength of less than about 40 lbf/100 ft.

Fluids and methods for mitigating sag and extending emulsion stability

A wellbore fluid may include a base fluid, and a ground weight material comprising barite and quartz and having a dbetween about 4 and 8 microns and a dbetween about 15-25 microns. The ground weight material of the wellbore fluid may have a specific gravity of less than or equal to about 4.2.

Wellbore fluids for use downhole

A method for transferring barite for use in wellbore fluids may include providing a ground weight material comprising barite and quartz having a dbetween about 4 and 8 and a dbetween about 15-25 microns to a pneumatic transfer vessel, supplying an air flow to the ground weight material in the pneumatic transfer vessel, and pneumatically transferring the ground weight material from the pneumatic transfer vessel to a storage vessel.

Methods of pneumatically conveying solid particulates

Embodiments disclosed herein relate to a method including feeding an invert emulsion wellbore fluid, or a previously used invert emulsion wellbore fluid, into a mixing unit; adding an additive to the mixing unit; delivering the invert emulsion wellbore fluid and the additive to one or more stages of the mixing unit, the mixing unit having a shear rate ranging from about 10,000 s-1 to about 100,000 s-1. The invert emulsion wellbore fluid includes a non-oleaginous fluid being the discontinuous internal aqueous phase of the wellbore fluid, and an oleaginous fluid being the continuous external phase of the wellbore fluid.

Method for increasing density of brine phase in oil-based and synthetic-based wellbore fluids

A method of drilling a subterranean well may include drilling the subterranean well while circulating a wellbore fluid in the subterranean well, wherein the wellbore fluid includes a base fluid; and a ground weight material comprising barite and quartz and having a dbetween about 4 and 8 microns and a dbetween about 15-25 microns.

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Houston, TX, United States of America

Chemsseddine Bouguetta