Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Reexamination Certificate
2005-01-25
2005-01-25
Hruskoci, Peter A. (Department: 1724)
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
C134S025100, C134S040000, C175S066000, C210S708000, C210S725000, C210S727000, C210S730000, C210S772000
Reexamination Certificate
active
06846420
ABSTRACT:
The present invention provides a process and an additive package for removing oil from solid material recovered from a well bore, e.g., drill cuttings and produced sand. In this process, the solid material is passed from the well bore to a separation zone. An aqueous acidic solution containing a polymer substituted with an amino group is introduced to the separation zone containing the solid material along with a halogenating agent and optionally one or more surfactants. The polymer, halogenating agent, and optional surfactant constitute the additive package. The polymer substituted with an amino group is preferably chitosan, and the halogenating agent is preferably a sodium hypochlorite solution. The mixture formed in the separation zone is agitated to cause a product of a reaction between the polymer and the halogenating agent to contact the solid material and remove residual oil therefrom.
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Dealy Sears T.
Reddy B. Raghava
Robb Ian D.
Conley & Rose, P.C.
Halliburton Energy Service,s Inc.
Hruskoci Peter A.
Roddy Craig W.
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