Connection assembly for directional drilling

Details Connection assembly for directional drilling Connection assembly for directional drilling

E - Fixed Constructions

21

B

E21B 17/046 (2006.01) E21B 7/06 (2006.01) E21B 10/60 (2006.01) E21B 10/62 (2006.01) F16L 37/14 (2006.01) F16L 37/252 (2006.01)

Patent

CA 2513435

Drill stem elements and connections are shown with advantages such as being mechanically robust. The absence of a side access window in a sonde housing is one design feature that provides robust mechanical properties. Further advantages of the sonde housings include being easy to disassemble for access to the sonde unit, or for insertion of the sonde unit. In one embodiment, a cap portion is easily secured or removed using a small allen wrench, or a hammer and a punch. The cap portion is not substantially affected or tightened by rotation of the drill stem during a drilling operation. A further advantage includes the ability to remove cap portions and pull back flexible product such as polyethylene pipe from a small exit pit.

La présente invention concerne des éléments de train de tige et des raccords mécaniquement très solides. Cette solidité découle en partie de l'absence de fenêtre latérale d'accès au carter de sonde. En outre, ces carters de sonde se démontent facilement pour avoir accès au module de sonde, ou pour l'insertion du module de sonde. Selon un mode de réalisation, on dispose d'un capot qui se monte et se dépose facilement au moyen d'une petite clé six pans, ou d'un marteau et d'un poinçon. Le capot n'est pas sensiblement affecté ni comprimé par la rotation du train de tiges pendant le forage. En outre, il est possible de déposer des parties du capot et de tirer un produit flexible tel qu'un tuyau de polyéthylène à partir d'un petit orifice de sortie.

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