Drilling system and method

Details Drilling system and method Drilling system and method

E - Fixed Constructions

21

B

E21B 21/08 (2006.01) E21B 44/00 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2432119

A closed-loop circulating system for drilling wells has control of the flow rates in and out of the wellbore. Kicks and fluid loses are quickly controlled by adjusting the backpressure. Kick tolerance and tripping margin are eliminated by real-time determination of pore and fracture pressure. The system can incorporate a rotating BOP and can be used with underbalanced drilling.

Système de circulation en circuit fermé conçu pour le forage de puits et permettant de réguler les débits à l'intérieur et à l'extérieur du puits. On contrôle rapidement les à-coups et les pertes de liquide par réglage de la pression de refoulement. On élimine la tolérance aux vibrations et la marge de manoeuvre par détermination en temps réel de la pression de pore et de fracture. Ce système peut incorporer un bloc obturateur rotatif et être utilisé dans le cas d'un forage sous-équilibré.

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