E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 15/00 (2006.01) E21B 19/08 (2006.01) E21B 19/086 (2006.01)
Patent
CA 2244772
There is described a mounting means for a piston-cylinder arrangement (10, 11) in a derrick (1) placed on a drill floor (2), which hydraulic piston-cylinder arrangement (10, 11) is adapted to raise and lower a yoke (8) which travels on guide rails (7) in the derrick (1) itself, where the cylinder (20) is firmly held by means of a mounting apparatus (31) in relation to the drill floor (2). For the changing of gaskets (27) on the piston (21) and the cylinder (20), the cylinder is arranged so as to be lowerable in relation to the mounting thereof. The mounting apparatus (31) is designed to be releasable and comprises a flange (32) permanently mounted on the cylinder (20), a fixing device (37) in fixed position in relation to the drill floor (2), a dividable locking ring (34), and a locking means (38), said locking ring (34) being adapted for engagement between the flange (32) and the fixing device (37) and being firmly held in said engagement with the aid of the locking means (38). A method of changing gaskets on a piston and cylinder is also described.
La présente invention concerne un dispositif de montage dans un derrick (1) d'un ensemble piston et cylindre (10, 11) placé sur un plate-forme (2) et conçu pour faire monter et descendre un étrier (8) circulant dans le derrick (1) entre des rails guides (7), le cylindre (20) étant fermement maintenu en relation avec la plate-forme (2) par un dispositif de montage (31). Concernant le changement des garnitures étanches (27) équipant le piston (21) et le cylindre (20), ce dernier est agencé de façon à pouvoir descendre par rapport à sa position de montage. Le dispositif de montage (31), libérable par construction, est constitué d'une bride (32) montée à demeure sur le cylindre (20), d'un dispositif de fixation (37) en position fixe par rapport à la plate-forme (2), d'un collier de serrage en plusieurs segments (34), et d'un organe de verrouillage (38). Le collier de serrage (34) est conçu pour s'appliquer entre la bride (32) et le dispositif de fixation (37) et se maintenir appliqué sous l'effet de l'organe de verrouillage (38). L'invention concerne également un procédé de changement des garnitures étanches équipant un ensemble piston et cylindre.
Maritime Hydraulics As
Mccarthy Tetrault Llp
LandOfFree
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