Zunkel; Gary D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Zunkel; Gary D..The latest application filed is for "delayed opening fluid sampler".
- Zunkel; Gary D. - Chickasha OK
| Patent | Date |
|---|---|
| Delayed opening fluid sampler Grant 4,903,765 - Zunkel February 27, 1 | 1990-02-27 |
| Pressure limiter for a downhole pump and testing apparatus Grant 4,877,086 - Zunkel October 31, 1 | 1989-10-31 |
| Retrievable gravel packer and retrieving tool Grant 4,793,411 - Zunkel December 27, 1 | 1988-12-27 |
| Rapid cycle annulus pressure responsive tester valve Grant 4,736,798 - Zunkel April 12, 1 | 1988-04-12 |
| Single zone gravel packing system Grant 4,726,419 - Zunkel February 23, 1 | 1988-02-23 |
| Hydrostatic referenced safety-circulating valve Grant 4,691,779 - McMahan , et al. September 8, 1 | 1987-09-08 |
| Retrievable well packer Grant 4,664,188 - Zunkel , et al. May 12, 1 | 1987-05-12 |
| Gravel packer Grant 4,638,859 - Zunkel , et al. January 27, 1 | 1987-01-27 |
| Gravel packer Grant 4,635,716 - Zunkel January 13, 1 | 1987-01-13 |
| Gravel packer Grant 4,633,944 - Zunkel , et al. January 6, 1 | 1987-01-06 |
| Gravel packer Grant 4,633,943 - Zunkel January 6, 1 | 1987-01-06 |
| Foam gravel packer Grant 4,628,993 - Zunkel December 16, 1 | 1986-12-16 |
| Well surging method and system Grant 4,619,325 - Zunkel October 28, 1 | 1986-10-28 |
| Method and apparatus for gravel-packing a well Grant 4,606,408 - Zunkel , et al. August 19, 1 | 1986-08-19 |
| Hydraulically activated liner setting device Grant 4,583,593 - Zunkel , et al. April 22, 1 | 1986-04-22 |
| Retrievable straddle packer Grant 4,567,944 - Zunkel , et al. February 4, 1 | 1986-02-04 |
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