Well servicing fluid for trenchless directional drilling
April 1, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2433668 Activation of clays by compaction Abandoned borehole compositions Well servicing fluid additive Water swellable clay composition and method to maintain stability in salt contaminated water Method for effecting electric well logging with introduction of a fluid composition to minimize the effect of interfering ions Carboxymethyl guar based drilling fluids Method for stimulating subterranean formations Method for fracturing high temperature subterranean formations Application of scleroglucan muds to drilling deviated wells Patent #: 5330015 InventorApplicationNo. 831359 filed on 04/01/1997US Classes:507/110, Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons507/141, Inorganic component contains soluble potassium salt507/145Inorganic component is soluble in boring mediumExaminersPrimary: Tucker, PhilipAttorney, Agent or FirmInternational ClassesC09K 007/00C09K 007/02 AbstractDisclosed 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.Field of SearchOrganic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbonsInorganic component contains soluble potassium salt Inorganic component is soluble in boring medium Polysaccharide is a xanthan (e.g., scleroglucans, etc.) Inorganic component contains potassium Inorganic component is soluble in the well treating medium Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons |
| ||||||||||||||
