The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2007
Filed:
Jun. 03, 2005
Jarrod Massam, Aberdeen, GB;
Neale Browne, Houston, TX (US);
Mukesh Kapilla, The Woodlands, TX (US);
Jarrod Massam, Aberdeen, GB;
Neale Browne, Houston, TX (US);
Mukesh Kapilla, The Woodlands, TX (US);
M-I L.L.C., Houston, TX (US);
Abstract
An additive that increases the density of fluids containing a sized barite weighting agent. The wellbore fluid has rheological properties comparable to a conventional wellbore fluids but does not exhibit problems with sag and resulting variations in density. An illustrative embodiment is directed to a method for making the sized barite weighting agent and a method for using such sized barite weighting agent in a wellbore fluid. In one preferred embodiment the sized barite weighting agent has a particle diameter between 4 μm to 15 μm In another preferred embodiment, the additive has a D(by weight) of approximately 1 μm to 6 μm. In another preferred embodiment the additive has a D(by weight) of approximately 4 μm to 8 μm. The additive may be used in any wellbore fluid such as drilling, cementing, completion, packing, work-over (repairing), stimulation, well killing, and spacer fluid.