www.logwell.com

The schematics listed below are pdf files.  The Adobe Acrobat pdf scheme is the best thing we have found for transmitting schematics online, especially between different computing platforms.  The Adobe Acrobat Reader is free and available by clicking the link below (if you are unfamiliar with pdf files, try clicking on a schematic first since the reader may already be installed on your machine).  The schematics may take from a few seconds to a minute or two to load, depending on connection speed.  As time permits, more schematics will be made available.

SCHEMATICS:

Casing Collar Locators
  Downhole Logging CCL Amps
  Improved CCL Low Pass Filter
  Shooting CCL
  Shooting CCL Meters / Amplifiers

Logging Tools
  Radiation Tool Preamps
  Line Driver Circuits
  Divide By Circuit
  Anti-Coincidence Circuits
  GO/GOI/MLS COSMOS Tool
  Bond Kill Circuits
  Bond Receiver Amp Circuits
  Downhole Logging CCL Amps

Surface Equipment
  Dummy Lines
  Gadgets & Gizmos (Stat Eliminator)
  Shooting CCL Meters / Amplifiers

Shooting / Explosives
  Dual Fire Perforator Wiring
  Shooting CCL
  Shooting CCL Meters / Amplifiers

RELATED WEB PAGES:

Casing Collar Locators
  Downhole CCL Amplifier Notes
  CCL Overview
  CCL Overview
  Shooting CCL Surface Amplifiers

Logging Tools
  Nuclear Logging (menu)
  Nuclear Logging (menu)
  High Count Rates
  Anti-Coincidence Considerations
  GO / GOI / MLS COSMOS Tool Notes
  Simultaneous Gamma / SIE Bond Log
  Cement Bond Logging Overview
  Downhole CCL Amplifier Notes

Surface Equipment
  Dummy Lines
  Al Biggs' Magical Stat Eliminator
  Shooting CCL Surface Amplifiers

Shooting / Explosives
  Lined Shaped Charge Jet Perforators
  CCL Overview
  Shooting CCL Surface Amplifiers

These schematics and more are also available at the AnaLog FTP Site (anonymous browser access).  Visit ftp.logwell.com if you use a dedicated ftp program.  See the schematics subdirectory.

AnaLog Services, Inc. also has an extensive library of paper schematics and other technical documents.  Included in our collection is the entire historical original vellum / film schematic archive of Bell Petroleum Systems (formerly Worth Well Surveys) comprising thousands of documents covering over a half century.  We try to help anybody in need of documents we have, but we must charge enough to cover our costs.  However, we are always looking for schematics, manuals, etc. not in our library; so if you have something we need, perhaps we can do some horse trading.

Also see our Application Notes menu, and see our Printed Circuit Boards (PCBs) page.