公开(公告)号：WO2014158918A1

公开(公告)日：2014-10-02

申请号：PCT/US2014/020902

申请日：2014-03-05

Applicant: STEPAN COMPANY

Inventor： PENDLETON, Nicholas S. ,  SMITH, Christopher D.

IPC: C09K8/536 ,  A01N25/02 ,  B01F17/00 ,  C07C69/593 ,  C09K8/584 ,  C08G65/26 ,  C11D1/28

CPC classification number: C09K8/584 ,  C09K8/536 ,  C11C3/00 ,  C11C3/10

Abstract: Foamable compositions useful for deliquifying gas wells, particularly gas wells having at least 40 vol.% of a hydrocarbon condensate, are disclosed. The compositions comprise, in addition to the condensate, an aqueous brine and 250 to 10,000 ppm of a monounsaturated betaine or sulfobetaine. A method for deliquifying the production line of a natural gas well is also disclosed. The method comprises introducing into a gas well a monounsaturated betaine or sulfobetaine to form a foamed composition, and removing at least a portion of the foamed composition from the production line. Certain betaines and sulfobetaines are remarkably effective in producing foams useful for gas well deliquification, particularly gas wells characterized by high or very high condensate levels. The inventive compositions and method provide a cost-effective way to enable thousands of gas wells to be utilized more productively.

Abstract translation: 公开了可用于气化井的气化组合物，特别是具有至少40体积％烃冷凝物的气井。 组合物除冷凝物外还包含水性盐水和250至10,000ppm的单不饱和甜菜碱或磺基甜菜碱。 还公开了天然气井生产线的鉴定方法。 该方法包括向气井中引入单不饱和甜菜碱或磺基甜菜碱以形成发泡组合物，并从生产线除去至少一部分发泡组合物。 某些甜菜碱和磺基甜菜碱在生产可用于气井分离的泡沫体方面是非常有效的，特别是以高或非常高的冷凝液水平为特征的气井。 本发明的组合物和方法提供了一种成本有效的方法，以使得能够更有效地利用数千个气井。

公开(公告)号：WO2008006058A3

公开(公告)日：2008-01-10

申请号：PCT/US2007/072937

申请日：2007-07-06

Applicant: STEPAN COMPANY ,  ALLEN, David R. ,  HUTCHISON, John C. ,  SMITH, Christopher D. ,  PYTEL, Jacqueline M.

Inventor： ALLEN, David R. ,  HUTCHISON, John C. ,  SMITH, Christopher D. ,  PYTEL, Jacqueline M.

IPC: C10M105/36

Abstract: Alkyl lactyllactate and alkoxylated alkyl lactyllactate compounds that are useful as solvents in a variety of applications are disclosed. The compounds are derived from a hydroxyl containing compound and a lactide or lactic acid source that has a specific chirality. The alkyl lactyllactate and alkoxylated alkyl lactyllactate compounds are particularly suitable for use as solvents in applications requiring cold tolerance performance without inclusion of additional volatile components.