Patent Number: 6,308,561

Title: Well logging apparatus

Abstract: A well logging device of compact reduced diameter compared to the prior art, such well logging device having both short spaced and long spaced types of gamma ray crystal detectors installed in a measurements skid that comprises a relatively small diameter device constructed to withstand high temperatures and pressures, this device comprising a continuous stainless steel tube which provides pressure resistance and also allows low energy gamma ray transparency via large and small windows. This elongate type of stainless steel skid tube is furthermore internally supported by an internal tungsten tube placed therewithin, while the skid design also includes means for pressing the skid tube against a borehole wall so as to obtain more accurate formation density measurements downhole.

Inventors: Samworth; James Roger (Ashby de la Zouch, GB), Easter; Charles Richard (Loughborough, GB), Pereira; Charles Alexander (Loughborough, GB), Mayor; Terence Paul (Keyworth, GB)

Assignee: Reeves Wireline Technologies

International Classification: E21B 17/00 (20060101); E21B 17/10 (20060101); E21B 47/00 (20060101); E21B 47/01 (20060101); G01V 005/12 (); G01V 005/00 (); G06F 015/20 ()

Expiration Date: 10/30/2018