Inventor · disambiguated record
Donald W. Winslow
Also filed as: WINSLOW DONALD · WINSLOW DONALD W
19 granted patents·927 citations·filing 1984–2009
96Inventor score
Top patents by PatentIndex Score
19 records- 0193US6976534B2Slip element for use with a downhole tool and a method of manufacturing sameHALLIBURTON ENERGY SERV INC·Filed 2003·Granted Dec 20, 2005·67 cites·32 claims
- 0287US6695050B2Expandable retaining shoeHALLIBURTON ENERGY SERV INC·Filed 2002·Granted Feb 24, 2004·91 cites·28 claims
- 0385US6695051B2Expandable retaining shoeHALLIBURTON ENERGY SERV INC·Filed 2002·Granted Feb 24, 2004·81 cites·25 claims
- 0484US8215404B2Stage cementing toolMAKOWIECKI GARY·Filed 2009·Granted Jul 10, 2012·33 cites·28 claims
- 0584US6378606B1High temperature high pressure retrievable packer with barrel slipHALLIBURTON ENERGY SERV INC·Filed 2000·Granted Apr 30, 2002·61 cites·10 claims
- 0684US4691779AHydrostatic referenced safety-circulating valveHALLIBURTON CO·Filed 1986·Granted Sep 8, 1987·72 cites·65 claims
- 0783US6102117ARetrievable high pressure, high temperature packer apparatus with anti-extrusion systemHALLIBURTON ENERGY SERV INC·Filed 1998·Granted Aug 15, 2000·86 cites·24 claims
- 0879US7533728B2Ball operated back pressure valveHALLIBURTON ENERGY SERV INC·Filed 2007·Granted May 19, 2009·20 cites·20 claims
- 0979US6481497B2High temperature high pressure retrievable packer with barrel slipHALLIBURTON ENERGY SERV INC·Filed 2002·Granted Nov 19, 2002·47 cites·11 claims
- 1078US5803177AWell treatment fluid placement tool and methodsHALLIBURTON ENERGY SERV INC·Filed 1996·Granted Sep 8, 1998·87 cites·20 claims
- 1176US6318460B1Retrievable high pressure, high temperature packer apparatus with anti-extrusion system and methodHALLIBURTON ENERGY SERV INC·Filed 2000·Granted Nov 20, 2001·43 cites·18 claims
- 1275US5383520ACoiled tubing inflatable packer with circulating portHALLIBURTON CO·Filed 1992·Granted Jan 24, 1995·53 cites·25 claims
- 1373US5456322ACoiled tubing inflatable packer with circulating portHALLIBURTON CO·Filed 1994·Granted Oct 10, 1995·49 cites·6 claims
- 1473US5029643ADrill pipe bridge plugHALLIBURTON CO·Filed 1990·Granted Jul 9, 1991·49 cites·12 claims
- 1569US5058684ADrill pipe bridge plugHALLIBURTON CO·Filed 1991·Granted Oct 22, 1991·41 cites·10 claims
- 1666US7597146B2Methods and apparatus for completion of well boresHALLIBURTON ENERGY SERV INC·Filed 2006·Granted Oct 6, 2009·10 cites·22 claims
- 1747US4560004ADrill pipe tester - pressure balancedHALLIBURTON CO·Filed 1984·Granted Dec 24, 1985·15 cites·8 claims
- 1839US4989672APacker locking apparatusHALLIBURTON CO·Filed 1990·Granted Feb 5, 1991·14 cites·20 claims
- 1933US5044434ALong stroke packerHALLIBURTON CO·Filed 1990·Granted Sep 3, 1991·8 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →