EP0096975A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Gamma ray spectral tool for borehole use
Assignee: Halliburton Co
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Filing: 1983-05-19
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Granted: —
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Expires: 2003-05-19
Abstract
Abstract A well logging tool for detecting low energy (E=150 to 300 Kev) natural gamma rays, includes a tubular housing member (24) which is protected from direct contact with well fluids (by aluminum layer 26) and is made of an epoxy graphite composition to give high transmission of the low- energy rays. A gamma ray detector is mounted inside the housing. The epoxy graphite composition preferably is made up of graphite filament wound into tubular form and impregnated with an epoxy resin.
Inventors
- 👤 Harry Davis Smith, Jr.
- 👤 Tony Martin Small
- 👤 John Gregory Deaton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:05
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/06; E; E21; E21B; E21B47/00; E21B47/01; E21B47/017
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
59 words
A well logging tool for use in detecting low energy gamma rays, said logging tool including: a tubular housing member construction of epoxy resin and a reinforcing means (24,38), means (26,39) for providing a fluid tight seal for isolating said housing member from well fluids; and means (18) disposed within said housing member for detecting low energy gamma rays.
Claim 2
Dependent Claim
59 words
A well logging tool for use in detecting low energy gamma rays, said logging tool including: a tubular housing member construction of epoxy resin and a reinforcing means (24,38), means (26,39) for providing a fluid tight seal for isolating said housing member from well fluids; and means (18) disposed within said housing member for detecting low energy gamma rays.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 1, wherein said reinforcing means incorporates a filament winding.
Claim 4
Dependent Claim
13 words
Apparatus according to claim 1 or 2 wherein said reinforcing means is graphite.
Claim 5
Dependent Claim
11 words
Apparatus according to claim 1 wherein said reinforcing means is boron.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 1,2,3 or 4, wherein said logging tool incorporates an outer tubular wear sleeve (40).
Claim 7
Dependent Claim
11 words
Apparatus according to claim 5, wherein said wear sleeve is aluminum.
Claim 8
Dependent Claim
18 words
Apparatus according to claim 5 or 6, wherein said sleeve includes an outer wear surface which is removable.
Claim 9
Dependent Claim
92 words
A well logging tool for use in detecting low energy gamma rays, said logging tool including at least one pair of threadedly interconnecting tubular members (30,31), said tubular members when interconnected defining a frusto-conical recess, a tubular composite graphite member (38) having at least one end with a complementarily shaped frusto-conical end for tight reception in said recess, a tubular rubber member (39) enclosing said graphite member; a tubular member (40) constructed of aluminum enclosing said rubber member; and means disposed internally of said graphite member for detecting low energy gamma rays.
Claim 10
Dependent Claim
92 words
A well logging tool for use in detecting low energy gamma rays, said logging tool including at least one pair of threadedly interconnecting tubular members (30,31), said tubular members when interconnected defining a frusto-conical recess, a tubular composite graphite member (38) having at least one end with a complementarily shaped frusto-conical end for tight reception in said recess, a tubular rubber member (39) enclosing said graphite member; a tubular member (40) constructed of aluminum enclosing said rubber member; and means disposed internally of said graphite member for detecting low energy gamma rays.
Claim 11
Dependent Claim
58 words
Apparatus according to claim 8, wherein said recess in said tubular members is defined by upper and lower tubular parts where said upper part defines an inner wall surface (37) and said lower part defined an outer wall surface (35), said lower part having external, stepped diametrical portions respectively for receiving said rubber member and said aluminum member.
References Cited (Backward Citations)
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