Weatherford/lamb, Inc.

Mike Wardley

Richard Lee Giroux

Albert C Odell, Ii

David J Brunnert

Tuong Thanh Le

Gregory Guy Galloway

Brent James Lirette

Jim B Terry

Gregory R Nazzal

James C Swarr

William M Beasley

Raymond H Jackson

Dave McKay

Samir Alkhatib

Rory McCrae Tulloch

James Bain

Binnert Ruerd Haites

Apparatus and methods for drilling with casing. In an embodiment, methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment, the apparatus comprises a motor operating system disposed in a motor system housing, a shaft operatively connected to the motor operating system, the shaft having a passageway, and a divert assembly disposed to direct fluid flow selectively to the motor operating system and the passageway in the shaft. In another aspect, methods and apparatus for directionally drilling a casing into the formation are disclosed. Methods and apparatus for measuring the trajectory of a wellbore while directionally drilling a casing into the formation are also described.

Apparatus and methods for drilling a wellbore using casing

A drill bit for drilling casing in a well bore. The drill bit is constructed from a combination of relatively soft and relatively hard materials. The proportions of the materials are selected such that the drill bit provides suitable cutting and boring of the well bore while being able to be drilled through by a subsequent drill bit. Methods of applying hard materials to a soft material body are provided.

Drilling bit for drilling while running casing

A tool for reducing torque on work string, eg for gas or oil production, comprises an upper clamp (), a lower clamp () and connection means (), the three components formed as a unitary structure (). The tool also comprises bearing means, preferably made from an elastomeric compound, and an annular body () (see FIG.) held in place over the connection means by the clamps. The clamps may comprise spigots () for retaining the connection means. In a preferred embodiment the annular body is in two semi-annular components connected at one end to allow them to pivot, and the other end comprises mating castellations for receiving a fastening pin. The annular body may comprise a number of replaceable wear pads () which may be made of bronze or an elastomer. The unitary structure of the tool enhances the integral strength and efficiency of the clamps.

Torque reduction tool

A reamer shoe () for mounting on a tubing string has a reaming area () supporting a plurality of discrete reaming members () typically formed as simple geometrical shapes. The reaming members provide complete circumferential coverage of the shoe body () but the individual reaming members are non-continuous and do not fully extend either longitudinally along or circumferentially around the reaming area on the shoe body. The invention therefore provides a reamer shoe for reaming a bore in preparation for receiving casing, which is effective on rotation or reciprocation, regardless of direction or speed.

Reamer shoe

A drill bit nozzle providing a through bore for the passage of drilling fluid through a drill bit. The nozzle is made of a material or materials which can be drilled through by standard well bore drilling equipment. The material(s) are selected to provide a surface to the through bore which has a relatively high resistance to erosion to withstand the abrasive and corrosive impact of jetted drilling fluid. Embodiments are described using a hard chrome/copper combination and a single rubber material.

Drillable drill bit nozzle

Growing community of inventors

Aberdeen, United Kingdom

Mike Wardley