Aphron-containing oil base fluids and method of drilling a well therewith
Patent 6156708 Issued on December 5, 2000. Estimated Expiration Date: 
February 9, 2019. 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.
February 9, 2019. 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 ReferencesPolysaccharide-containing well drilling and servicing fluids Method of increasing the LSRV of aqueous fluids and oil-in-water emulsions prepared thereby Patent #: 5977030 InventorsAssigneeApplicationNo. 246935 filed on 02/09/1999US Classes:507/102, Contains intended gaseous phase at entry into wellbore166/309, Producing foam or gas in well by foaming or gas producing material175/72, Prevention of lost circulation or caving507/202Contains intended gaseous phase at entry into wellboreExaminersPrimary: Tucker, PhilipAttorney, Agent or FirmInternational ClassesC09K 007/08E21B 043/00 E21B 007/18 AbstractAphron-containing oil based well drilling and servicing fluids are disclosed which seal microfractures and the like during drilling and well servicing operations, thus decreasing the volume of fluid lost to the formations contacted by the fluids.. The fluids comprise an oleaginous liquid as the continuous phase, a viscosifier which imparts a low shear rate viscosity to the fluids of at least 10,000 centipoise, an aphron-generating surfactant, and aphrons. The fluids are used in a conventional method of drilling an oil and/or gas well or in conventional methods of servicing or treating such wells, such as in completion, workover, sand control, and frac pack operations, and as spotting fluids to release stuck pipes or tools in a wellbore.Other References
|
| ||||||||||||||
