Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6536525 | Methods and apparatus for forming a lateral wellbore | David M. Haugen, Neil A. A. Simpson, Kevin L. Gray, Robert P. Badrak, David J. Brunnert | 2003-03-25 |
| 6311771 | Plug for use in wellbore operations and apparatus for launching said plug | Tarald Gudmestad | 2001-11-06 |
| 6142230 | Wellbore tubular patch system | Michael Smalley, Thomas R. Bailey, Ralph D. Wright, David M. Haugen | 2000-11-07 |
| 6082451 | Wellbore shoe joints and cementing systems | Richard L. Giroux, Peter Budde, Erik P. Eriksen | 2000-07-04 |
| 5957195 | Wellbore tool stroke indicator system and tubular patch | Thomas R. Bailey, Ralph D. Wright, David M. Haugen, Michael Smalley | 1999-09-28 |
| 5887655 | Wellbore milling and drilling | David M. Haugen, William A. Blizzard, Jr., Mark W. Schnitker, Steve R. Delgado, Thurman B. Carter +4 more | 1999-03-30 |
| 5887668 | Wellbore milling-- drilling | David M. Haugen, Joseph Mills, Randy P. Hutchings, Guy L. McClung, III, Steve R. Delgado | 1999-03-30 |
| 5368098 | Stage tool | William A. Blizzard, Jr. | 1994-11-29 |
| 5318122 | Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means | Douglas J. Murray | 1994-06-07 |
| 4473231 | Dynamic seal for subterranean well | Roger A. Weinberg, Morgan Carthledge Salter | 1984-09-25 |
| 4373584 | Single trip tubing hanger assembly | Raphael J. Silberman, Everett H. Smith, Dennis A. Wichkoski | 1983-02-15 |
| 4252196 | Control tool | Raphael J. Silberman, Everett H. Smith | 1981-02-24 |
| 4248307 | Latch assembly and method | Raphael J. Silberman, Everett H. Smith, Dennis A. Wichkoski | 1981-02-03 |
| 4239083 | Method and apparatus for rotating tubing conduits | Raphael J. Silberman, Everett H. Smith | 1980-12-16 |