| 8881835 |
Manipulator tool and tool catcher useful with wellbore reverse circulation |
Robert M. Tessari, Barry J. Tate |
2014-11-11 |
$44,387,000 |
| 8443906 |
Tools and methods useful with wellbore reverse circulation |
Robert M. Tessari, Barry J. Tate |
2013-05-21 |
$38,097,000 |
| 8230947 |
Method of selecting a drilling motor for a casing drill string |
— |
2012-07-31 |
$5,499,000 |
| 8176986 |
Method of circulating while retrieving bottom hole assembly in casing |
Preston T. Honeycutt, Michael Brouse |
2012-05-15 |
$6,579,000 |
| 7886847 |
Monitoring flow rates while retrieving bottom hole assembly during casing while drilling operations |
Erik P. Eriksen, Michael E. Moffitt |
2011-02-15 |
$5,807,000 |
| 7845417 |
Method of circulating while retrieving downhole tool in casing |
Preston T. Honeycutt, Michael Brouse |
2010-12-07 |
$2,454,000 |
| 7845431 |
Retrieval tool with slips for retrieving bottom hole assembly during casing while drilling operations |
Erik P. Eriksen, Michael E. Moffitt |
2010-12-07 |
$2,454,000 |
| 7814972 |
Wireline entry sub |
Per Angman |
2010-10-19 |
$2,305,000 |
| 7798251 |
Circulation system for retrieval of bottom hole assembly during casing while drilling operations |
Erik P. Eriksen, Michael E. Moffitt |
2010-09-21 |
$4,083,000 |
| 7779920 |
Controlling backflow pressure during retrieval of bottom hole assembly |
Erik P. Eriksen, Michael E. Moffitt |
2010-08-24 |
$3,600,000 |
| 7775302 |
Casing shoe and retrievable bit assembly |
— |
2010-08-17 |
$3,761,000 |
| 7708077 |
Retrieval of bottom hole assembly during casing while drilling operations |
Erik P. Eriksen, Michael E. Moffitt |
2010-05-04 |
$4,516,000 |
| 7647990 |
Method for drilling with a wellbore liner |
Robert M. Tessari, Barry J. Tate |
2010-01-19 |
$6,671,000 |
| 7637330 |
Casing bottom hole assembly retrieval process |
Per Angman, Robert M. Tessari |
2009-12-29 |
$6,351,000 |
| 7604057 |
Incremental U-tube process to retrieve of bottom hole assembly during casing while drilling operations |
Erik P. Eriksen, Michael E. Moffitt |
2009-10-20 |
$7,376,000 |
| 7575061 |
Wireline entry sub and method of using |
Per Angman |
2009-08-18 |
$6,072,000 |
| 7520343 |
Retrievable center bit |
John E. Hughes |
2009-04-21 |
$7,300,000 |
| 7472763 |
Wear resistant tubular connection |
Maurice William Slack, Robert M. Tessari, Per Angman |
2009-01-06 |
$7,285,000 |
| 7219727 |
Wear resistant tubular connection |
Maurice William Slack, Robert M. Tessari, Per Angman |
2007-05-22 |
$9,988,000 |
| 7090004 |
Cement float |
Per Angman |
2006-08-15 |
$5,473,000 |
| 7013992 |
Borehole stabilization while drilling |
Robert M. Tessari, Per Angman, Maurice William Slack |
2006-03-21 |
$5,464,000 |
| 5941323 |
Steerable directional drilling tool |
— |
1999-08-24 |
$190,331,000 |
| 5802011 |
Pressure signalling for fluidic media |
Warren J. Winters |
1998-09-01 |
$281,160,000 |
| 5601151 |
Drilling tool |
— |
1997-02-11 |
$74,613,000 |
| 5547031 |
Orientation control mechanism |
Houston B. Mount, II |
1996-08-20 |
$129,584,000 |
