Lactone polyol esters as oleaginous additives Patent #: 4123373
ApplicationNo. 06/428825 filed on 09/30/1982
US Classes:507/261, Organic component contains ether linkage (e.g., PEG ether, etc.)166/301, Freeing stuck object, grappling or fishing in well507/136, Organic component contains ether linkage (e.g., PEG ether, etc.)507/940FREEING STUCK OBJECT FROM WELLBORE
ExaminersPrimary: Guynn, Herbert B.
Assistant: Kilby, Catherine S.
Attorney, Agent or Firm
International ClassC09K 8/02 (20060101)
AbstractAn additive composition effective in the release of stuck pipe in a borehole during a drilling operation which composition contains a propoxylated lactone acid, e.g. a C8 -C22 alkyl lactone acids having from 10 to 13 propylene glycol units, an oil-soluble emulsifier-wetting agent and a liquid hydrocarbon diluent and for enhanced elevated temperature emulsion stability may include an imidazoline.