E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/10 (2006.01) E21B 17/22 (2006.01)
Patent
CA 2428557
A torque reducing tubing component for insertion in a tubing string to be used in a bore hole. Upsets (22,30,24,26,28) are mounted on the outer surface of the component which reduce the contact between the tubing string and the bore hole wall thereby reducing friction between the tubing string and the bore wall. Grooves (46) on the upsets act to channel fluid around the upsets creating a fluid bearing film between the contact points of the tubing string and the bore wall. A pressure differential is also created around the upsets serving to attract fluid away from the bore wall so improving the efficiency of the circulation of fluid to the surface. Particular reference is made to a torque reducing tubing component for use in a drill string which improves the efficiency of cuttings removal.
L'invention concerne un composant de tubage r~ducteur de couple destin~ ~ Útre ins~r~ dans une colonne de production utilis~e dans un trou de forage. Des refoulements (22, 24, 26, 28, 30) sont dispos~s sur la surface ext~rieure dudit composant et permettent de limiter le contact entre la colonne de production et la paroi du trou de forage, d'oÕ une r~duction du frottement entre la colonne de production et la paroi du trou de forage. Des rainures (46) m~nag~es sur les refoulements agissent de fa×on ~ canaliser le fluide autour des refoulements, ce qui permet de former un palier fluide pelliculaire entre les points de contact de la colonne de production et de la paroi du trou de forage. Un diff~rentiel de pression cr~~ autour des refoulements attire le fluide dans le sens oppos~ ~ la paroi du trou de forage, d'oÕ une am~lioration de la circulation de fluide vers la surface. L'invention se rapporte notamment ~ un composant de tubage r~ducteur de couple utilis~ dans un train de tiges de forage et facilitant l'extraction des d~blais de forage.
Marks & Clerk
Weatherford/lamb Inc.
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