| 摘要 |
<p>Rig (1) for drilling or maintaining oil wells presenting:
- a base structure (2) which is provided with a support platform (3) on the ground and a raised work platform (5);
- a deck (6) which is co-planar to and integral with the support platform (3) and which is suitable for housing a trailer (7);
- a telescopic antenna (8) which is provided with two fixing eyelets (9) which are arranged at the lower end of the telescopic antenna (8) itself in order to be hinged to the work platform (5); and
- a lifting device (10) which is suitable for lifting the telescopic antenna (8) from a transport position, in which it reposes on the means of transport (7) with the two fixing eyelets (9) at a lower level than the level of the work platform (5), to a working position, in which it is vertically arranged on the work platform (5) with the fixing eyelets (9) hinged to the work platform (5) itself; the lifting device (10) being provided with a moving structure (10') of the kind which is an articulated parallelogram provided with at least two rocker arms (11) which are hinged to the telescopic antenna (8) and which are hingeable to the deck (6), and with at least one linear actuator (12) with a variable thrust head which may be interposed between the telescopic antenna (8) and the deck (6) in order to activate the moving structure (10') and lift the telescopic antenna (8).</p> |
