Bestline Liner Systems

Richard M Dobson

Leo D Hudson

Jefferey D Herndon

Jeffrey D Herndon

A well completion system and method including a landing adapter which can be interlocked with a landing ring. A split ring is retained within a groove in the landing adapter which operates to lock the landing adapter with the landing ring. The groove into which the shear ring is positioned has two effective diameters. A first diameter allows the shear ring to compress and pass within the landing ring. The second diameter prevents extraction without shearing of the ring. A by-pass tool is positioned with a liner assembly 14 having a landing adapter. The by-pass tool includes a valve sleeve having a first position allowing flow down the center bore into a stinger extending to a wash-in shoe. Once the liner assembly has been washed in, the valve sleeve assumes a second, open position. Gravel packing may then occur through the central bore with return through a by-pass passage through the tool. Cleaning of the liner and tool can also occur through reverse flow to the gravel packed area.

Well completion method

Bypass tool

Well completion tool

Shear-out landing adapter

A system including method and apparatus for placing and cementing a plurality of scab liners as well as a surface liner in a well with one placement. A duplex assembly is created using a lower duplex tool having a duplex shoe with a valve assembly positioned in the duplex tool. A scab casing is fixed to the duplex tool and drill pipe extends into the scab casing to mate with the valve assembly. A ratchet insures locking of the drill string. The valve assembly includes elements to control flow of cement to outwardly of the scab casing and the flow of flushing fluid inwardly of the scab casing. A locking mechanism using floating dogs controlled by a locking sleeve allows unlocking of the valve assembly from the duplex tool upon completion of the cementing and flushing operation. Similar operations are conducted in succeeding duplex assemblies upwardly along the string, each succeeding scab casing being cemented in turn. Once the cementing is complete, the string and valve assemblies are withdrawn from the well leaving liner segments cemented in place with drill-out duplex elements remaining.

Multiple casing segment cementing system

An oil well tool including a release mechanism, a splined torque transmitting driver, a liner, an under reamer and a drill bit. Circulation in a passageway through the tool provides drilling foam or fluid to the drill bit and under reamer. A restriction below the under reamer provides pressure to hydraulically force cone arms of the under reamer outwardly. A valve mechanism located within a stinger subassembly within the liner controls communication between the central passageway and the perforated liner. The valve is actuated by placement of a ball following drilling. Gravel packing through the well annulus may then occur following drilling. A second valve may later by actuated to separate the drill pipe from the liner and associated components.

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Bakersfield, CA, United States of America

Richard M Dobson