Production and recovery of lactic acid for polylactide—an overview

AN Vaidya, RA Pandey, S Mudliar… - Critical reviews in …, 2005 - Taylor & Francis
In the recent past the ultimate disposability of synthetic plastics has been a greater
environmental concern, and it has triggered the R&D efforts in the designing of material with …

Compositions and methods for improving proppant pack permeability and fracture conductivity in a subterranean well

PD Nguyen, BL Todd, T Munoz Jr - US Patent 7,044,220, 2006 - Google Patents
The present invention relates to enhancing? uid? oW from subterranean formations. More
particularly, this invention relates to providing improved proppant matrixes Within fractures in …

Methods of hydraulic fracturing and of propping fractures in subterranean formations

PD Nguyen, JD Weaver, RA Gibson… - US Patent 7,281,581, 2007 - Google Patents
A method of propping at least one fracture in a subterranean formation, that comprises
forming a plurality of proppant aggregates, each proppant aggregate comprising a binding …

Methods for improving proppant pack permeability and fracture conductivity in a subterranean well

ME Blauch, PD Nguyen, TD Welton - US Patent 7,178,596, 2007 - Google Patents
The present invention provides compositions and methods for enhancing subterranean well
productivity by enhancing fracture conductivity. A method of increasing the conductivity of a …

Reduced-density proppants and methods of using reduced-density proppants to enhance their transport in well bores and fractures

D Justus, BL Todd, PD Nguyen - US Patent 7,066,258, 2006 - Google Patents
The present invention provides reduced-density coated particulates and methods for
enhancing the transport of such particulates into well bores and fractures, and for enhancing …

Methods of stimulating a subterranean formation comprising multiple production intervals

LE East Jr, TW Cavender, DJ Attaway - US Patent 7,273,099, 2007 - Google Patents
3,857,444 A 12/1974 Copeland-166/276 4,848,470 A 7/1989 Korpics...................... 166/312
3,863,709 A 2/1975 Fitch............. 165/1 4,850,430 A 7/1989 Copeland et 31 ' 166/276 …

Permeable cement and sand control methods utilizing permeable cement in subterranean well bores

PD Nguyen - US Patent 7,032,663, 2006 - Google Patents
This invention relates to improved methods for completing wells in unconsolidated
subterranean zones. More specifically, the present invention relates to cement compositions …

Methods for fracturing subterranean wells

PD Nguyen - US Patent 7,334,635, 2008 - Google Patents
A method of forming a propped fracture comprising: providing a fracture having a far-well
bore area and a near-well bore area; placing first proppant particulates at least partially …

Permeable cement and methods of fracturing utilizing permeable cement in subterranean well bores

PD Nguyen - US Patent 7,044,224, 2006 - Google Patents
The present invention relates to methods of stimulating a subterranean formation. More
particularly, but not by way of limitation, the present invention relates to methods of frac …

Methods of diverting treating fluids in subterranean zones and degradable diverting materials

T Munoz Jr, BL Todd - US Patent 7,036,587, 2006 - Google Patents
Methods of diverting treating fluids in subterranean Zones penetrated by well bores are
provided. The methods basi cally comprise the following steps. A degradable particulate …