| Patent Number |
Title Of Patent |
Date Issued |
| 7336562 |
Sonic logging tool including receiver and spacer structure |
February 26, 2008 |
| A formation logging tool having a substantially continuous central mandrel with regularly spaced mass blocks disposed thereon, at least some of the mass blocks carrying sensors such as receivers. By adopting this structure, the tool can be made to behave as a mass-spring structure and |
| 7334661 |
Acoustic logging tool sleeve |
February 26, 2008 |
| An acoustic logging tool sleeve with a preferably discontinuous, alternating structure that is acoustically opaque in some zones, and acoustically transparent in others. The sleeve may be modular, with several stages connected together. The multiple stages provide a sleeve that may b |
| 6868036 |
Oil well acoustic logging tool with baffles forming an acoustic waveguide |
March 15, 2005 |
| An acoustic logging tool includes external baffle assemblies forming a waveguide structure at the acoustic source. The logging tool is designed for acoustic logging of earth formation surrounding a borehole. The external baffle assemblies form a waveguide structure that is designed to |
| 6739423 |
Acoustic logging tool |
May 25, 2004 |
| A sleeve for an acoustic logging tool has a structure with a window section having fewer bars than a conventional sleeve separated by a slotted region with thin circumferential slots which are stress-relieved at the ends ("dumb-bell" shaped). Steel receiver mounts are provided for hydrop |
| 6671224 |
Active reduction of tool borne noise in a sonic logging tool |
December 30, 2003 |
| A sonic logging tool that can be positioned within a fluid-filled borehole includes an axially distributed active vibration control system to reduce tool borne noise. The tool includes an acoustic transmitter, an axial array of acoustic receivers, and actuator assemblies that are coupled |
| 6494288 |
Acoustic logging tool |
December 17, 2002 |
| A sleeve for an acoustic logging tool having a structure with a window section having fewer bars than a conventional sleeve separated by a slotted region with thin circumferential slots which are stress-relieved at the ends ("dumb-bell" shaped). Steel receiver mounts are provided for |
| 6474439 |
Dipole logging tool |
November 5, 2002 |
| A logging tool having a tool body, which can be positioned in a fluid-filled borehole, including a receiver section and a dipole transmitter; wherein the dipole transmitter includes a transducer with a shell having a reaction mass and a motor located therein, the motor operatively co |
