Abstract: The present invention is a method and apparatus used to transmit information to the surface from a subsurface location during the process of drilling a bore hole comprising a pressure pulse generator or “pulser” coupled to a sensor package, a controller, an active electromagnetic system for subsurface collision avoidance, and a battery power source all of which reside inside a short section of drill pipe close to the bit at the bottom of the bore hole being drilled wherein the apparatus or “MWD Tool” can be commanded from the surface to make a measurement of desired parameters and transmit this information to the surface by encoding data in pressure pulses generated by a pulser valve that includes a stator and a rotor which may be open and closed to create pressure pulses.

Abstract: The present invention is a method and apparatus used to transmit information to the surface from a subsurface location during the process of drilling a bore hole comprising a pressure pulse generator or “pulser” coupled to a sensor package, a controller, an active electromagnetic system for subsurface collision avoidance, and a battery power source all of which reside inside a short section of drill pipe close to the bit at the bottom of the bore hole being drilled wherein the apparatus or “MWD Tool” can be commanded from the surface to make a measurement of desired parameters and transmit this information to the surface by encoding data in pressure pulses generated by a pulser valve that includes a stator and a rotor which may be open and closed to create pressure pulses.

Abstract: A method and system are provided for issuing credit as payment in a consumer transaction which eliminates the need for a traditional credit card while also minimizing any potential for fraud or theft. The present invention responds to a request for issuing a credit transaction number that is made concurrent with a particular transaction. The credit transaction number is then randomly generated and made valid only for the requested transaction, and automatically ages a short period of time after the request. The credit transaction numbers are continually recycled for subsequent requests irrespective of the customer identity. The request can be made from a mobile communication device such as PCS telephone, or from a personal computer using an electronic commerce program.

Abstract: A method and system are provided for issuing credit as payment in a consumer transaction which eliminates the need for a traditional credit card while also minimizing any potential for fraud or theft. The present invention responds to a request for issuing a credit transaction number that is made concurrent with a particular transaction. The credit transaction number is then randomly generated and made valid only for the requested transaction, and automatically ages a short period of time after the request. The credit transaction numbers are continually recycled for subsequent requests irrespective of the customer identity. The request can be made from a mobile communication device such as PCS telephone, or from a personal computer using an electronic commerce program.