Radiation detector for well-logging tool
AssigneeSchlumberger Technology Corporation
InventorChristian Stoller
Life of this patent
Estimating the term…
Abstract
A radiation detector is used in a well-logging tool for positioning in a wellbore of a geologic formation. The radiation detector includes a photomultiplier housing and a scintillator housing. A housing coupler joins together opposing ends of the photomultiplier housing and scintillator housing. A photomultiplier is contained within the photomultiplier housing and a scintillator body is contained within the scintillator housing. A scintillator window is secured to the housing coupler.
Claims20
A radiation detector comprising:
- a photomultiplier housing;
- a scintillator housing;
- a housing coupler joining opposing ends of said photomultiplier housing and scintillator housing together, wherein the housing coupler forms a hermetic seal that hermetically seals the photomultiplier housing and the scintillator housing;
- a photomultiplier within said photomultiplier housing;
- a scintillator body within said scintillator housing;
- and
- a scintillator window secured to said housing coupler.
A well-logging tool for positioning in a wellbore of a geologic formation comprising:
- a well-logging housing and;
- a radiation detector within the well-logging housing comprising,
- a photomultiplier housing;
- a scintillator housing;
- a housing coupler joining opposing ends of said photomultiplier housing and scintillator housing together, wherein the housing coupler forms a hermetic seal that hermetically seals the photomultiplier housing and the scintillator housing;
- a photomultiplier within said photomultiplier housing;
- a scintillator body within said scintillator housing;
- a scintillator window within said scintillator housing;
- and
- a brazed joint securing said scintillator window and said housing coupler together;
- said scintillator window comprising a first material having a first CTE;
- said housing coupler comprising a second material having a second CTE that is within ±20 percent of the first CTE.
A method for making a radiation detector for a well-logging tool, the method comprising:
- securing a scintillator window and a housing coupler together;
- and
- joining opposing ends of a photomultiplier housing and scintillator housing together using the housing coupler, wherein the housing coupler forms a hermetic seal that hermetically seals the photomultiplier housing and the scintillator housing, and with a photomultiplier within the photomultiplier housing, and a scintillator body within the scintillator housing.
Dependencies are inferred from the claim text.