| Patent Number |
Title Of Patent |
Date Issued |
| 6607042 |
Method of dynamically controlling bottom hole circulation pressure in a wellbore |
August 19, 2003 |
| A method of drilling a well having a first tubular member extending from the surface of the well to a position proximate the bottom of the well. The first tubular member has an inner annulus therethrough. A fluid is pumped into the well through the inner annulus of the first tubular memb |
| 4893049 |
Lithium niobate explosion monitor |
January 9, 1990 |
| Monitoring explosive devices is accomplished with a substantially z-cut lithium niobate crystal in abutment with the explosive device. Upon impact by a shock wave from detonation of the explosive device, the crystal emits a current pulse prior to destruction of the crystal. The current p |
| 4783382 |
Shock-activated electrochemical power supplies |
November 8, 1988 |
| A shock-activated electrochemical power supply is provided which is initiated extremely rapidly and which has a long shelf life. Electrochemical power supplies of this invention are initiated much faster than conventional thermal batteries. Power supplies of this invention comprise a |
