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Class Information
Number: 175/72
Name: Boring or penetrating the earth > Processes > Boring with specific fluid > Prevention of lost circulation or caving
Description: Processes comprising the step of treating a subsurface earth formation during drilling (1) to prevent the loss of drilling fluid into such formation or (2) to prevent the earth formation of the bore wall from collapsing into the earth bore.

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8689869 Method for providing thixotrophy to fluids downhole Apr. 8, 2014
8672058 Method for repairing aberrations along a drill bore wall Mar. 18, 2014
8627888 Settable compositions containing metakaolin having reduced portland cement content Jan. 14, 2014
8613319 Lost-circulation material made from a recycled material containing asphalt Dec. 24, 2013
8607895 Drilling fluid additive for reducing lost circulation in a drilling operation Dec. 17, 2013
8592350 Surfactant additives used to retain producibility while drilling Nov. 26, 2013
8563480 Subterranean bridging agents Oct. 22, 2013
8544565 Lost circulation control fluids for naturally fractured carbonate formations Oct. 1, 2013
8534383 Viscosity reducer for water-based muds Sep. 17, 2013
8522898 Method for dispersing aqueous based drilling fluid for drilling subterranean boreholes Sep. 3, 2013
8507413 Methods using well drilling fluids having clay control properties Aug. 13, 2013
8479817 Method and composition for curing lost circulation Jul. 9, 2013
8479819 Method of consolidating a fracture in a formation Jul. 9, 2013
8469118 Drilling fluid containing carbon nanotubes Jun. 25, 2013
8459355 Radiation-induced triggering for set-on-command compositions and methods of use Jun. 11, 2013
8453735 Method and biodegradable water based thinner composition for drilling subterranean boreholes with aqueous based drilling fluid Jun. 4, 2013
8434568 Method and system for circulating fluid in a well system May. 7, 2013
8401795 Methods of detecting, preventing, and remediating lost circulation Mar. 19, 2013
8393411 Method for controlling loss of drilling fluid Mar. 12, 2013
8387723 Drilling fluid and method for drilling in coal-containing formations Mar. 5, 2013
8381813 Methods for servicing subterranean wells Feb. 26, 2013
8371381 Engineered fibers for well treatments Feb. 12, 2013
8356667 Liquid crystals for drilling, completion and production fluids Jan. 22, 2013
8307916 Controlling fluid loss in oil and gas wells Nov. 13, 2012
8297357 Acid-soluble cement compositions comprising cement kiln dust and/or a natural pozzolan and methods of use Oct. 30, 2012
8276663 Methods for reducing biological load in subterranean formations Oct. 2, 2012
8245775 Wellbore consolidating tool for rotary drilling application Aug. 21, 2012
8245783 Radiation-induced triggering for set-on-command compositions and methods of use Aug. 21, 2012
8235119 Drilling fluid and method for reducing lost circulation Aug. 7, 2012
8220565 Treatment of subterranean formations Jul. 17, 2012
8215393 Method for treating well bore within a subterranean formation Jul. 10, 2012
8201628 Wellbore pressure control with segregated fluid columns Jun. 19, 2012
8162057 Radiation-induced thickening for set-on-command sealant compositions and methods of use Apr. 24, 2012
8157010 Treatment of subterranean formations Apr. 17, 2012
8148303 Surfactant additives used to retain producibility while drilling Apr. 3, 2012
8141637 Manipulation of flow underground Mar. 27, 2012
8138124 Drilling fluid with circulation loss reducing additive package Mar. 20, 2012
8132623 Methods of using lost circulation compositions Mar. 13, 2012
8127866 Air injection collar Mar. 6, 2012
RE43199 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells Feb. 21, 2012
8109335 Degradable diverting agents and associated methods Feb. 7, 2012
8105984 Reduced abrasion drilling fluid Jan. 31, 2012
8071509 Glycerol based drilling fluids Dec. 6, 2011
8053394 Drilling fluids with redispersible polymer powders Nov. 8, 2011
8006761 Wellbore fluid comprising a base fluid and a particulate bridging agent Aug. 30, 2011
7992656 Self healing filter-cake removal system for open hole completions Aug. 9, 2011
7989399 Drilling fluid and methods Aug. 2, 2011
7942215 Drilling fluids for oil and gas reservoirs with high carbonate contents May. 17, 2011
7926591 Aqueous-based emulsified consolidating agents suitable for use in drill-in applications Apr. 19, 2011
7918289 Method of completing a well with sand screens Apr. 5, 2011

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