Well servicing fluid for trenchless directional drilling
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 3, 1998
Grant Date -
N/A
app pub date -
Apr 1, 1997
filing date -
Apr 1, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a composition comprising a water swellable clay, and particularly a sodium montmorillonite clay such as bentonite, sodium carbonate, and a water-soluble biopolymer, and particularly a xanthan biopolymer. The composition when mixed with fresh water forms an aqueous drilling mud having the desirable fluid properties including a high gel strength profile of 10-second/10-minute/30-minute gel and a low API fluid loss for use in trenchless directional drilling including mini-horizontal directional drilling, guided boring, auger boring, pipe jacking, microtunneling, and river crossing. The composition mixed with an aqueous medium provides a water-based drilling mud applicable to trenchless directional drilling in an unconsolidated formation and particularly in an environment contaminated with salty water such as sea water. The composition contains a mixture of about 91 to 98% by weight of Wyoming bentonite, about 1 to 8% by weight of carbonate salt of alkali metal, and about 0.5 to 4% by weight of a selective xanthan biopolymer.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully