Number | Name | Date | Kind |
---|---|---|---|
2356302 | Chapman | Aug 1944 | A |
2562866 | Kurtz, Jr. et al. | Jul 1951 | A |
2649159 | Boyer | Aug 1953 | A |
2730497 | Suen et al. | Jan 1956 | A |
3087544 | Forsman | Apr 1963 | A |
3126959 | Ortloff | Mar 1964 | A |
3935910 | Gaudy et al. | Feb 1976 | A |
3976135 | Anderson | Aug 1976 | A |
4042032 | Anderson et al. | Aug 1977 | A |
4105618 | Sifferman et al. | Aug 1978 | A |
4199484 | Murphey | Apr 1980 | A |
4301016 | Carriere et al. | Nov 1981 | A |
4579668 | Messenger | Apr 1986 | A |
4649998 | Friedman | Mar 1987 | A |
4671883 | Connell et al. | Jun 1987 | A |
4722397 | Sydansk et al. | Feb 1988 | A |
4760882 | Novak | Aug 1988 | A |
4784223 | Worrall et al. | Nov 1988 | A |
4811789 | Jennings et al. | Mar 1989 | A |
4821802 | Meltz et al. | Apr 1989 | A |
4964465 | Surles | Oct 1990 | A |
5094762 | Lahalih | Mar 1992 | A |
5295541 | Ng et al. | Mar 1994 | A |
5458195 | Totten et al. | Oct 1995 | A |
5558171 | McGlothlin et al. | Sep 1996 | A |
5569324 | Totten et al. | Oct 1996 | A |
5578672 | Beall et al. | Nov 1996 | A |
5711383 | Terry et al. | Jan 1998 | A |
5783527 | Dobson et al. | Jul 1998 | A |
5866516 | Costin | Feb 1999 | A |
5911282 | Onan et al. | Jun 1999 | A |
5913364 | Sweatman | Jun 1999 | A |
5945387 | Chatterji et al. | Aug 1999 | A |
5968879 | Onan et al. | Oct 1999 | A |
6012524 | Chatterji et al. | Jan 2000 | A |
6059035 | Chatterji et al. | May 2000 | A |
6107256 | Udarbe et al. | Aug 2000 | A |
6124246 | Heathman et al. | Sep 2000 | A |
6152227 | Lawson et al. | Nov 2000 | A |
6167967 | Sweatman | Jan 2001 | B1 |
6176315 | Reddy et al. | Jan 2001 | B1 |
6209646 | Reddy et al. | Apr 2001 | B1 |
6258757 | Sweatman et al. | Jul 2001 | B1 |
6271181 | Chatterji et al. | Aug 2001 | B1 |
6328106 | Griffith et al. | Dec 2001 | B1 |
6401817 | Griffith et al. | Jun 2002 | B1 |
6482776 | Matz et al. | Nov 2002 | B1 |
6508306 | Reddy et al. | Jan 2003 | B1 |
Number | Date | Country |
---|---|---|
0 997 515 | May 2000 | EP |
WO 0198626 | Dec 2001 | WO |
WO 0198627 | Dec 2001 | WO |
WO 0204784 | Jan 2002 | WO |
Entry |
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Abstract No. XP-002255423 entitled “Stabilising reagents for drilling soluntion comprise derivative of polyethyleneimine which provide stability in presence of minerals and raised temperatures,” by Gembitskii, P.A. et al. |
Abstract No. XP-002255422 entitled “Lost circulation zone polymer plugging—uses hardener with adduct of polyethyleneimine and copper sulphate taken in specified proportion,” by Abdurakhim, N. et al. |