Bestline Liner Systems

Bestline Liner System, Inc.

Formlock, Inc.

Leo D Hudson

Richard M Dobson

Jefferey D Herndon

Jeffrey D Herndon

Ross S Woods

Gary L Bailey

Sherman R Warren

A hanger for use in joining tubulars includes an inner tubular with a first portion of length with increasing wall thickness and a second portion of length with decreasing wall thickness through the same longitudinal direction. A swedge sized to expand the inner tubular beyond the yield point to engage and expand the outer tubular is to be drawn through the inner tubular. With the variation in wall thickness, the outer tubular is progressively expanded in an increasing manner and then in a decreasing manner. The difference in inelastic expansion operates to insure an appropriate ultimate fit at one or two areas between the overlapping tubulars. The inner tubular may include a nipple affixed to a liner or may include a liner with an outer filler. In one case, the nipple has varying wall thickness while in the other the filler exhibits the varying wall thickness. A segmented swedge includes portions of the part lines between adjacent segments which are circumferential. Shear elements extend across the circumferential sections to hold the swedge together.

Apparatus and method for hanging tubulars in wells

A well tubular is hung within a casing through placement of the tubular in overlapping relationship with the casing. A spacer may be located therebetween. The tubular is expanded which in turn expands the spacer when used. The tubular is expanded beyond the yield point such that it or an intervening spacer engages the inside of the casing and stresses the casing within its elastic limits. The assembly then contracts to form a tight structural support between the tubulars and a high pressure seal against flow therebetween. A spacer having channels about either end with ductile sealing material therein is of an expanded metal material through cuts in the sheet. A hydraulic ram is employed with an expandable collet to draw the collet through the overlapping area of the liner and the casing. The collet extends within a shoulder at the end of its stroke such that it will be substantially released from the upper end of the liner. A method for placing a lateral liner includes expanding the liner to beyond its yield point within the hole through the casing. The stub of the liner positioned within the casing may then be drilled out such that completed lateral and main bores are achieved.

Method and apparatus for hanging tubulars in wells

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

Process for completing a well with a well liner which can be accomplished with a single placement of the equipment in the well

Process for completing a well

A well tool for drilling in, cementing and completing a liner installation in a single placement. A hydraulic setting tool actuates an adapter sleeve to decouple splines forming a two-direction torque drive. The hydraulic setting tool also actuates a slips set for hanging the liner and a deformable sleeve seal. A coupling includes external splines on the hydraulic setting tool and on the upper portion of the liner. Reverse threads engage the setting tool with the upper end of the liner as well. Movement of the adapter sleeve which has internal splines releases the spline coupling such that after the well has been completed, the drill string can be rotated to release the liner.

Well tool for completing a well

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.

Well completion tool and process

Processes for completing a well with a well liner which can be accomplished with a single placement of the equipment in the well.

Growing community of inventors

Bakersfield, CA, United States of America

Leo D Hudson