Invention Grant
US3973131A Pulsed neutron logging: multipurpose logging sonde for changing types of
logs in the borehole without bringing the sonde to the surface
失效
脉冲中子测井：用于改变钻孔中原木的类型的多功能测井仪，而不需要将探头带到地面
- Patent Title: Pulsed neutron logging: multipurpose logging sonde for changing types of logs in the borehole without bringing the sonde to the surface
- Patent Title (中): 脉冲中子测井：用于改变钻孔中原木的类型的多功能测井仪，而不需要将探头带到地面
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Application No.: US536532Application Date: 1974-12-26
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Publication No.: US3973131APublication Date: 1976-08-03
- Inventor: Steve G. Malone , Obie M. Langford
- Applicant: Steve G. Malone , Obie M. Langford
- Applicant Address: NY New York
- Assignee: Texaco Inc.
- Current Assignee: Texaco Inc.
- Current Assignee Address: NY New York
- Main IPC: G01V5/04
- IPC: G01V5/04 ; E21B47/12 ; G01N23/221 ; G01N33/24 ; G01V5/10 ; G21G4/02 ; G01V5/00
Abstract:
Disclosed is a system for nuclear well logging in which neutron pulse time duration for a high energy neutron generator and the frequency of pulses are selected downhole in the tool by use of a coded signal transmitted by the cable from the earth's surface. Separate channel systems are provided in the downhole tool for desired neutron pulse width and repetition frequency and are operated by a decoder system. Additionally, the accelerator voltage on a high energy neutron generator is controlled by a downhole switching system to selectively obtain different neutron output in response to coded signal transmissions. Moreover, provisions for obtaining different timing pulses to control gates for sampling signals generated in the tool are provided.
Public/Granted literature
- US5697856A Solid golf ball and process for producing the same Public/Granted day:1997-12-16
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