Steerable Earth Boring Assembly Having Flow Tube with Static Seal,申请号US201514920340-传众专利搜索

Steerable Earth Boring Assembly Having Flow Tube with Static Seal

申请公布号：US2017002610(A1)

申请号：US201514920340

申请日期：2015.10.22

申请公布日期：2017.01.05

申请人：

Bitswave Inc.

发明人：Marshall Ricki Don;Davis Treston Greggory

分类号：E21B7/06;E21B3/00;E21B17/16

主分类号：E21B7/06

地址：Sugar Land TX US

摘要：A steerable earth boring assembly which includes an annular collar and a drive shaft with a drill bit, where the shaft pivots with respect to the collar. An upstream portion of the shaft inserts into an orientation sleeve which resides in the collar. An axial bore is obliquely formed through the sleeve, and in which the upstream portion inserts. Rotating the sleeve causes precession of the upstream portion, thereby pivoting the drill bit obliquely to the collar. Selective rotation of the sleeve orients the drill bit into a designated orientation for forming a deviated wellbore. Included in the assembly is a flow tube with an end in sealing contact with the drive shall.

主权项：1. A steerable earth boring assembly comprising: an annular collar that has an end in selective engagement with a drill string; an annular flow tube disposed in the collar that is in fluid communication with an annulus in the drill string; a drive shaft coupled with the collar and that is pivotable with respect to the flow tube; a bore axially formed through the drive shaft that selectively receives an earth boring bit and that is in fluid communication with the flow tube; and a sealing element that defines a static seal between the flow tube and drive shaft.