FIELD: well drilling equipment, particularly special apparatus for deflecting horizontal side bores during bore drilling with the use of downhole motor.
SUBSTANCE: orientation device adapted to be used in downhole assemblies for multi-branch well repair comprises composite body, piston with hollow rod and outer straight spiral splines arranged in the body. Installed in the body are return spring and spindle with hollow shaft. The return spring is located in cavity under the piston and connected with buffer cavity by means of dividing spring-loaded annular piston. The buffer cavity is communicated with space behind the body through drainage window. Hollow spindle shaft is kinematically connected with hollow rod by means of jaw clutch including movable upper and lower fixed collars. The upper jaw clutch collar is brought into engagement with spiral splines. The lower jaw clutch collar is fastened to composite body. The collars may engage ratchet crown of hollow shaft by means of spring-loaded ratchet fixers, which are made as plates installed in blind wedge-like sockets so that the plates may perform limited movement in the sockets. The sockets are provided with cylindrical bottoms. Fixer springs are located in blind holes made in collars. Cavity under the piston is divided into two halves connected with each other by throttling channel. The throttling channel is defined by space between inner and outer cylindrical surfaces of fixed collar and hollow spindle shaft.
EFFECT: increased reliability and service life of the device.
3 cl, 6 dwg
Title | Year | Author | Number |
---|---|---|---|
ORIENTATOR OF FLEXIBLE PIPE | 2009 |
|
RU2398949C1 |
ORIENTATOR OF FLEXIBLE PIPE | 2007 |
|
RU2355862C2 |
DEFLECTING TOOL | 2001 |
|
RU2184201C1 |
DEVICE FOR ORIENTATION OF FLEXIBLE PIPE IN BRANCH HOLE | 2010 |
|
RU2444603C2 |
DEVICE FOR SECONDARY TAPPING OF PRODUCING FORMATIONS OF OIL AND GAS WELLS (VERSIONS) | 2002 |
|
RU2213197C1 |
CONTROLLED ASSEMBLY OF BOTTOMHOLE MOTOR FOR DRILLING OF DIRECTIONAL AND HORIZONTAL WELLS | 1997 |
|
RU2131967C1 |
OVERRUNNING SAFETY CLUTCH | 2006 |
|
RU2334139C1 |
REDUCER-DRIVEN TURBO-DRILL | 1994 |
|
RU2084609C1 |
SHOCK-ABSORBER TURBODRILL | 2000 |
|
RU2161235C1 |
UNIVERSAL DRIVE OF SLIP-TYPE PREVENTER | 1993 |
|
RU2085701C1 |
Authors
Dates
2006-09-27—Published
2005-01-11—Filed