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公开(公告)号:JPS63284397A
公开(公告)日:1988-11-21
申请号:JP10744388
申请日:1988-04-28
Applicant: CONOCO INC
Inventor: KORIN PIITAA RIICHI
IPC: E21B33/064 , E21B7/12 , E21B21/00 , E21B21/08 , E21B33/035 , E21B33/08
Abstract: A method and apparatus for drilling subsea wells in water depths exceeding 3000 feet (preferably exceeding 4000 feet). Drilling mud returns are taken at the seafloor and pumped to the surface by a centrifugal pump (81) that is powered by a seawater driven turbine. A low-differential pressure rotating head (70) seats in the upper tapered portion of the longitudinal throughbore of an upper stack package (60) which is attached to the top of the blowout preventer stack and seals against the drill string (12) as it is run in and out of the borehole. The drilling mud returns are pumped to the surface via a mud return line (82), a conventional riser not being used.
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公开(公告)号:JPS6345438B2
公开(公告)日:1988-09-09
申请号:JP5354179
申请日:1979-05-02
Applicant: CONOCO INC
Inventor: JEEMUZU AARU MATSUKONAFUI , HOORU SHII HOINAA , JON AARU FURAIDEE
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公开(公告)号:JPS6332054B2
公开(公告)日:1988-06-28
申请号:JP5936480
申请日:1980-05-02
Applicant: CONOCO INC
Inventor: KAN YAN , JERARUDO RII NIIRUDO , HOORU HOWAADO UOTSUSHECHETSUKU
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公开(公告)号:JPS6324033B2
公开(公告)日:1988-05-19
申请号:JP13784779
申请日:1979-10-26
Applicant: CONOCO INC
Inventor: JEEMUSU RICHAADO MATSUKONAFUI
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公开(公告)号:JPS6366483A
公开(公告)日:1988-03-25
申请号:JP13103787
申请日:1987-05-27
Applicant: CONOCO INC
Inventor: JIYATSUKU EICHI KOORU , JIYON ESU JIYAAJIRII
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公开(公告)号:JPS62280635A
公开(公告)日:1987-12-05
申请号:JP3260687
申请日:1987-02-17
Applicant: CONOCO INC
Inventor: MITSUCHIERU II UIRIAMUSU
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公开(公告)号:JPS62218296A
公开(公告)日:1987-09-25
申请号:JP25212686
申请日:1986-10-24
Applicant: CONOCO INC
Inventor: CHIYAARUSU ENU HOWAITO , ANDORIYUU EFU HANTAA
IPC: B63B21/50 , E02B17/00 , E21B17/01 , E21B43/017
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公开(公告)号:JPS62199760A
公开(公告)日:1987-09-03
申请号:JP30668686
申请日:1986-12-24
Applicant: CONOCO INC
Inventor: JIYAGANNASAN MURARI
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公开(公告)号:JPS6268559A
公开(公告)日:1987-03-28
申请号:JP20620685
申请日:1985-09-18
Applicant: CONOCO INC
Inventor: TOOMASU DEE SANDORUBURUTSUKU , ROI OO SUKIYANDORORU
IPC: B03D1/26
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