公开(公告)号：US3611799A

公开(公告)日：1971-10-12

申请号：US3611799D

申请日：1969-10-01

Applicant: DRESSER IND

Inventor： DAVIS MIKE

IPC: E21B49/10 ,  E21B43/00

CPC classification number: E21B49/10

Abstract: A MULTIPLE CHAMBER SAMPLING SYSTEM FOR OBTAINING FLUID SAMPLES FROM EARTH FORMATIONS WHEREIN A BOREHOLE EXPLORING UNIT SUPPORTED FOR MOVEMENT THROUGH THE BOREHOLE IS PROVIDED WITH SPACED MEANS FOR ISOLATING BOREHOLE WALL FORMATION PORTIONS FROM BOREHOLE FLUIDS. A FLOW CHANNEL SELECTIVELY INTERCONNECTS THE ISOLATION MEANS AND HAS A PUMP THEREIN FOR PRODUCING FLUID FLOW FROM THE FORMATION THROUGH THE FLOW CHANNEL BACK INTO THE FORMATION. ENGAGING UNITS CONTACT THE FORMATIONS AND FLUID THEREIN IS PUMPED FROM ONE FORMATION TO ANOTHER OR FROM ONE PORTION OF A FORMATION TO ANOTHER PORTION OF THE SAME FORMATION. A SET OF VALVES CONTROLLABLE FROM THE SURFACES PROVIDES MEANS FOR FILLING THE MULTIPLE SAMPLING CHAMBERS AND TRANSDUCERS PROVIDE INDICATIONS OF VARIOUS PHYSICAL CHARACTERISTICS OF THE FLUID. MEANS ARE PROVIDED FOR DETERMINING THE EXPLORING UNIT''S DEPTH IN THE BOREHOLE.

公开(公告)号：US3600582A

公开(公告)日：1971-08-17

申请号：US3600582D

申请日：1968-06-03

Applicant: DRESSER IND

Inventor： DAVIS MIKE ,  YOUMANS ARTHUR H

IPC: G01V5/10 ,  G01V5/00

CPC classification number: G01V5/102 ,  G01V5/108

Abstract: The thermal neutron capture cross section of the fluid in an earth borehole is altered by the addition of a soluble neutron absorber and a radioactive tracer material, the tracer material serving to facilitate location of the injected fluid by means of a radiation detector and the neutron absorber serving to facilitate measurement of the pore volume occupied by the injected fluid in the formations surrounding the borehole by measurement of the thermal neutron capture cross section of the formation.