Patent ID: 7692140
Filing Date: 2010-04-06
Classification: G01V

Abstract:
1. A downhole tool string component, comprising: a tubular body comprising a central bore, the tubular body comprising an inner and outer diameter; a sleeve disposed over the tubular body and connected thereto; the tubular body is made of a first material comprising a first modulus of elasticity and the sleeve is made of a second material with a second modulus of elasticity; and wherein the second modulus of elasticity is 40 percent to 63 percent of the first modulus; wherein the sleeve houses a pulse neutron generator; wherein the sleeve comprises a shield intermediate the pulse neutron generator and a nuclear detector wherein the shield comprises a modulus of elasticity greater than the second modulus of elasticity; and wherein a direct path from the pulse neutron generator to the nuclear detector is interrupted by the shield; wherein the shield comprises a plurality of grooves adapted to reduce stress risers when the shield is in compression or tension.