E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/14 (2006.01) E21B 7/20 (2006.01) E21B 17/046 (2006.01)
Patent
CA 2270959
An overburden drilling device includes a drill bit body, a percussion element for applying impacts to the body, and a casing attached to the body. The casing is connected to the drill bit body by a casing shoe which comprises semi-cylindrical halves which are held together by a circular ring that is welded to the halves. The casing shoe and the drill bit body are interconnected by radially overlapping walls so that the drill bit body pulls the casing along during a drilling operation.
La présente invention concerne un dispositif de forage de morts-terrains comprenant un corps de trépan, un élément de percussion permettant de donner des chocs à ce corps, et un tubage attaché au corps. Le tubage est relié au corps de trépan par un sabot composé de deux moitiés semi-cylindriques maintenues ensemble au moyen d'un anneau circulaire qui est soudé aux deux moitiés. Le sabot et le corps de trépan sont reliés l'un à l'autre par leurs parois qui se chevauchent radialement de manière qu'au cours d'une opération de forage, le corps de trépan entraîne le tubage.
Gowling Lafleur Henderson Llp
Sandvik Ab
LandOfFree
Method and apparatus for attaching a casing to a drill bit... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for attaching a casing to a drill bit..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for attaching a casing to a drill bit... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1968745