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公开(公告)号:US2685892A
公开(公告)日:1954-08-10
申请号:US20796851
申请日:1951-01-26
Applicant: OIL CT TOOL COMPANY
Inventor: EDWARDS JACK E
IPC: E21B34/02
CPC classification number: E21B34/02 , Y10T137/86976
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公开(公告)号:US2634754A
公开(公告)日:1953-04-14
申请号:US6728848
申请日:1948-12-27
Applicant: OIL CT TOOL COMPANY
Inventor: RAHN HAROLD C
IPC: F16K31/363
CPC classification number: F16K31/363 , Y10T137/86686 , Y10T137/86895
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公开(公告)号:US2633918A
公开(公告)日:1953-04-07
申请号:US18302750
申请日:1950-09-02
Applicant: OIL CT TOOL COMPANY
Inventor: LE ROUAX ROBERT K
IPC: E21B33/129
CPC classification number: E21B33/1291
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公开(公告)号:US3061268A
公开(公告)日:1962-10-30
申请号:US5028160
申请日:1960-08-17
Applicant: OIL CT TOOL COMPANY
Inventor: PAUL ZAWACKI JOHN
IPC: F16K27/06
CPC classification number: F16K27/062 , Y10T137/0346 , Y10T137/7501 , Y10T137/7504
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公开(公告)号:US2716457A
公开(公告)日:1955-08-30
申请号:US18290650
申请日:1950-09-02
Applicant: OIL CT TOOL COMPANY
Inventor: LE ROUAX ROBERT K
IPC: E21B33/129
CPC classification number: E21B33/129
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公开(公告)号:US2639169A
公开(公告)日:1953-05-19
申请号:US6207548
申请日:1948-11-26
Applicant: OIL CT TOOL COMPANY
Inventor: JONES MARVIN R
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公开(公告)号:US2591142A
公开(公告)日:1952-04-01
申请号:US2138448
申请日:1948-04-16
Applicant: OIL CT TOOL COMPANY
Inventor: ECKEL JOHN E
IPC: E21B33/04
CPC classification number: E21B33/04
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公开(公告)号:US2532662A
公开(公告)日:1950-12-05
申请号:US773848
申请日:1948-02-12
Applicant: OIL CT TOOL COMPANY
Inventor: ECKEL JOHN E , JONES MARVIN R
CPC classification number: E21B33/0422 , E21B19/10
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公开(公告)号:US2426370A
公开(公告)日:1947-08-26
申请号:US51294943
申请日:1943-12-04
Applicant: OIL CT TOOL COMPANY
Inventor: PENICK ARTHUR J
IPC: E21B33/129
CPC classification number: E21B33/1292
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