Assignee
LYNCH DAVIS INC
US·19 granted patents·1,446 citations·filing 1978–2008
Technology mixE21B19
Top patents by PatentIndex Score
19 records- 0193US5584343AMethod and apparatus for filling and circulating fluid in a wellbore during casing running operationsLYNCH DAVIS INC·Filed 1995·Granted Dec 17, 1996·188 cites·7 claims
- 0291US5024273ACementing apparatus and methodLYNCH DAVIS INC·Filed 1990·Granted Jun 18, 1991·176 cites·24 claims
- 0390US5234052ACementing apparatusLYNCH DAVIS INC·Filed 1992·Granted Aug 10, 1993·153 cites·16 claims
- 0490US4892144AInflatable toolsLYNCH DAVIS INC·Filed 1989·Granted Jan 9, 1990·93 cites·27 claims
- 0589US6679336B2Multi-purpose float equipment and methodLYNCH DAVIS INC·Filed 2001·Granted Jan 20, 2004·90 cites·54 claims
- 0687US5566772ATelescoping casing joint for landing a casting string in a well boreLYNCH DAVIS INC·Filed 1995·Granted Oct 22, 1996·157 cites·26 claims
- 0782US5085273ACasing lined oil or gas wellLYNCH DAVIS INC·Filed 1990·Granted Feb 4, 1992·83 cites·11 claims
- 0881US5842517AAnti-rotational cementing apparatusLYNCH DAVIS INC·Filed 1997·Granted Dec 1, 1998·92 cites·16 claims
- 0978US5411095AApparatus for cementing a casing stringLYNCH DAVIS INC·Filed 1993·Granted May 2, 1995·81 cites·33 claims
- 1077US6401824B1Well completion convertible float shoe/collarLYNCH DAVIS INC·Filed 2000·Granted Jun 11, 2002·46 cites·18 claims
- 1175US6401811B1Tool tie-downLYNCH DAVIS INC·Filed 2000·Granted Jun 11, 2002·39 cites·9 claims
- 1272US5027894AThrough the tubing bridge plugLYNCH DAVIS INC·Filed 1990·Granted Jul 2, 1991·56 cites·7 claims
- 1372US4171019AApparatus and method for re-entering and cementing an underwater wellLYNCH DAVIS INC·Filed 1978·Granted Oct 16, 1979·39 cites·9 claims
- 1464US5197542AWell packerLYNCH DAVIS INC·Filed 1992·Granted Mar 30, 1993·40 cites·3 claims
- 1561US5150756AWell completion apparatusLYNCH DAVIS INC·Filed 1991·Granted Sep 29, 1992·43 cites·4 claims
- 1658US7849918B2Centering structure for tubular member and method of making sameLYNCH DAVIS INC·Filed 2008·Granted Dec 14, 2010·12 cites·16 claims
- 1752US4909322ACasing centralizerLYNCH DAVIS INC·Filed 1989·Granted Mar 20, 1990·28 cites·5 claims
- 1850US6439304B2Stand-off deviceLYNCH DAVIS INC·Filed 2001·Granted Aug 27, 2002·17 cites·23 claims
- 1946US6562401B2Method for making a stand-off device to prevent an oilfield tubular from contacting the side of the wellboreLYNCH DAVIS INC·Filed 2001·Granted May 13, 2003·13 cites·19 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →