Patent ID: 6488085
Filing Date: 2002-12-03
Classification: E21B

Abstract:
A method for well logging and control of a well containing drillpipe having a drill bit secured at a downhole end thereof and the well having operatively connected thereto a pump for pumping fluid in the well, the method comprising:a) inserting a well logging tool having a bi-directional differential pressure fluid valve contact means for allowing fluid to pass through the logging tool to allow the maintenance of fluid contact in the well, into the well; b) providing fluid in the well for pumping said well logging tool down to a desired position in said well at a first fluid pressure level; c) transporting said well logging tool upwardly in said well and logging data from said well while said well logging tool is transported; and d) continuing to pump said fluid in said well, while said logging of data is taking place, such that said fluid flows through said well logging tool; wherein the drill bit includes means for enabling the logging tool to protrude through the drill bit; and wherein the desired position of the logging tool is that of protrusion of the logging tool through the drill bit, the method including logging of the well without prior withdrawal of the drill bit from the well.