1
Neal G Skinner: Electromagnetic and acoustic repeater and method for use of same. Halliburton Energy Services, Paul I Herman, Lawerence R Youst, November 7, 2000: US06144316 (49 worldwide citation)

An electromagnetic and acoustic signal repeater (34) for communicating information between surface equipment and downhole equipment and a method for use of the repeater (34) is disclosed. The repeater (34) comprises an electromagnetic receiver (48) and an acoustic receiver (49) for respectively rece ...


2
Kimball J Norman, Dan W Pratt: Shaped charge liner and method of manufacture. Arrow Metals division of Reliance Steel and Aluminum Co, Owen Oil Tool, Sanford E Warren Jr, Lawerence R Youst, Gardere & Wynne L, January 11, 2000: US06012392 (15 worldwide citation)

Shaped charge liners are formed from an alloy of nickel, tin, and copper, which is first formed into a powder, and then pressed into strips. The pressed strips of powdered alloy are next sintered and then cold rolled. Thereafter, the powdered, pressed, and sintered alloy strips are formed into shape ...