NO933148L - Device for deviation drilling - Google Patents

Device for deviation drilling

Info

Publication number
NO933148L
NO933148L NO933148A NO933148A NO933148L NO 933148 L NO933148 L NO 933148L NO 933148 A NO933148 A NO 933148A NO 933148 A NO933148 A NO 933148A NO 933148 L NO933148 L NO 933148L
Authority
NO
Norway
Prior art keywords
sleeve
spindle
annular chamber
cylindrical portion
axis
Prior art date
Application number
NO933148A
Other languages
Norwegian (no)
Other versions
NO933148D0 (en
Inventor
Robert Patrick Appleton
Original Assignee
Appleton Robert P
Milne Donald Stewart
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Appleton Robert P, Milne Donald Stewart filed Critical Appleton Robert P
Publication of NO933148D0 publication Critical patent/NO933148D0/en
Publication of NO933148L publication Critical patent/NO933148L/en

Links

Landscapes

  • Earth Drilling (AREA)

Abstract

En innretning (10) for avviksboring som har en hul spindel (11) med en hylse (12) lagret derpå. Et hult sylinderformet parti av hylsen (12) avgrenser et ringformet kammer (22) og bærer sideveis utvidende styrestempler ( 23) for kontakt med hullveggen for å bevirke styring. Aksen av det hule sylinderformede parti av hylsen (12) er parallelt med og side- veis forskjøvet fra spindelens (11) akse. Det ringformede kammer (22) står i forbindelse med et kammer (31) med vari- abelt volum som har et fjærreturnert ringformet stempel (29). Kamrene ( 22) og (31) er under bruk fylt med olje for hydraulisk virkning. Stemplet (29) beve- ges ved trykk av boreslam fra spindelen (11) ved hjelp av en reguleringsventil (15) som kan være elektrisk drevet. Anordningen holder boreslam borte fra styrestemplene og fjerner behovet for tette tetninger mellom det ringformede kammer (22) og lageret for hylsen (12).Device drilling device (10) having a hollow spindle (11) with a sleeve (12) stored thereon. A hollow cylindrical portion of the sleeve (12) defines an annular chamber (22) and carries laterally extending guide pistons (23) for contact with the hole wall to effect control. The axis of the hollow cylindrical portion of the sleeve (12) is parallel to and laterally displaced from the axis of the spindle (11). The annular chamber (22) communicates with a variable volume chamber (31) having a spring-retained annular piston (29). The chambers (22) and (31) are filled with oil for hydraulic operation. The piston (29) is actuated by pressure of drilling mud from the spindle (11) by means of a control valve (15) which can be electrically driven. The device keeps drilling mud away from the guide pistons and removes the need for tight seals between the annular chamber (22) and the bearing for the sleeve (12).

NO933148A 1992-09-05 1993-09-03 Device for deviation drilling NO933148L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB929218839A GB9218839D0 (en) 1992-09-05 1992-09-05 Drilling wells

Publications (2)

Publication Number Publication Date
NO933148D0 NO933148D0 (en) 1993-09-03
NO933148L true NO933148L (en) 1994-03-07

Family

ID=10721470

Family Applications (1)

Application Number Title Priority Date Filing Date
NO933148A NO933148L (en) 1992-09-05 1993-09-03 Device for deviation drilling

Country Status (2)

Country Link
GB (1) GB9218839D0 (en)
NO (1) NO933148L (en)

Also Published As

Publication number Publication date
NO933148D0 (en) 1993-09-03
GB9218839D0 (en) 1992-10-21

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application