Drilling rig with hinged, retractable outriggers

Details Drilling rig with hinged, retractable outriggers Drilling rig with hinged, retractable outriggers

E - Fixed Constructions

21

B

E21B 7/02 (2006.01)

Patent

CA 2753417

A mobile drilling structure (12) with a base frame adapted to accommodate one or more tractor (18) units to drill a series of relatively closely spaced boreholes in an oilfield. The drilling structure has a plurality of hinged outriggers (26) adapted to transfer the weight of the drilling structure to a plurality of outboard tractors, but which may be retracted when not needed. The hinged outriggers allow the drilling structure to be more easy moved when lateral and longitudinal movements of the drilling structure are required in a confined area.

L'invention concerne une structure mobile de forage dotée d'une armature de base prévue pour recevoir une ou plusieurs unités de traction afin de forer une série de trous de sonde relativement proches les uns des autres sur un champ pétrolier. La structure de forage comporte une pluralité de stabilisateurs articulés qui sont prévus pour transférer le poids de la structure de forage vers une pluralité de tracteurs déportés, mais qui peuvent être rétractés lorsqu'ils ne sont pas nécessaires. Les stabilisateurs articulés permettent de déplacer plus facilement la structure de forage lorsque des mouvements latéraux et longitudinaux de la structure de forage sont requis dans un espace restreint.

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