Schlumberger Technology Corporation

Kenneth R. Goodman

Lawrence A. Behrmann

Frank F. Chang

Wanchai Ratanasirigulchai

Andrew J. Martin

Ian C. Walton

Keng Seng Chan

Lawrence A Behrmann

Wenbo Yang

Ian C Walton

Brenden M Grove

Ashley Bernard Johnson

Manuel P Marya

Frank F Chang

Steven W Henderson

Harvey Williams

Fokko Harm Cornelis Doornbosch

Robert Ference

James E Brooks

Wallace E Voreck

Andrew J Martin

Kenneth R Goodman

Alfredo Fayard

Daniel C Markel

Mark C Duhon

William J Lukasavage

James Guilkey

Jeremy Harvey

Claude Jones

Carlos Erik Baumann

Adinathan Venkitaraman

Dinesh R Patel

Manish Kothari

Robert A Parrott

Jorge E Lopez De Cardenas

Vladimir Vaynshteyn

Raymond J Tibbles

Jason Hoang Mai

Philip Kneisl

Joseph Ayoub

Andrew T Werner

Lang Zhan

Jerry D Campbell

Anthony P Vovers

Brindesh Dhruva

Adil Mahallab Al Busaidy

Adil Busaidy

Ashley B Johnson

Ronald Lutz

Francois Black

Michael W Fruge

Karri A Brock

Jean-Luc Lafontan

Fokko H C Doornbosch

Fokko Harm Cornelis Doombosch

Karim Al Sayed

A technique facilitates perforation, including the perforation of a casing and formation. A shaped charge is formed with a case, a liner, and a high explosive material located between the case and the liner. The liner is formed of a powder material, e.g. a powder metal material. The powder material properties of the liner between an apex of the liner and a skirt of the liner may be selectively varied to provide a desired jet velocity and jet mass of the liner upon detonation of the high explosive material.

Shaped charge system having multi-composition liner

A shaped charge includes a charge case; a liner; an explosive retained between the charge case and the liner; and a primer core disposed in a hole in the charge case and in contact with the explosive, wherein at least one of the case, the liner, the primer core, and the explosive comprising a material soluble in a selected fluid. A perforation system includes a perforation gun, comprising a gun housing that includes a safety valve or a firing valve, wherein the safety valve or the firing valve comprises a material soluble in a selected fluid.

Dissolvable material application in perforating

A shaped charge includes a cup-shaped casing defining an interior volume; a liner located within the interior volume; an explosive disposed between the liner and the casing; and a reactive material disposed between the liner and the casing. A method for generating a dynamic overbalance inside a wellbore includes disposing a perforation gun in the wellbore; and detonating a shaped charge in the perforation gun, wherein the shaped charge includes a cup-shaped casing defining an interior volume, a liner located within the interior volume, an explosive disposed between the liner and the casing, and a reactive material disposed between the liner and the casing.

Energetic material applications in shaped charges for perforation operations

An assembly for minimizing damaging effects of pressure waves on devices in a wellbore. The assembly comprises a dynamic device disposed in the wellbore and generating pressure waves during actuation; a barrier device disposed in the wellbore and presenting an obstacle to the pressure waves generated by the dynamic device; and an occlusion disposed in the wellbore between the dynamic device and the barrier device which reduces the damaging effects of the pressure waves on the barrier device.

Assemblies and methods for minimizing pressure-wave damage

A downhole tool assembly for use in a wellbore includes a tubular body carrying an explosive which is selectively detonated to create a dynamic underbalance or overbalance effect in the wellbore. The tubular body has opposite ends provided with plug assemblies including plug elements movable between a normally collapsed state and an actuable expanded state. The plug elements are adapted to be actuated to the expanded state between the tubular body and an outer extent of the wellbore before the creation of the dynamic underbalance or overbalance effect to isolate a discrete segment of the wellbore to which the dynamic underbalance or overbalance effect is confined.

Device for the focus and control of dynamic underbalance or dynamic overbalance in a wellbore

A shaped charge includes a charge case; an explosive disposed inside the charge case; and a liner for retaining the explosive in the charge case, wherein the liner comprises a material reactive with a component of an earth formation. A method for perforating in a well includes disposing a perforating gun in the well, wherein the perforating gun comprises a shaped charge having a charge case, an explosive disposed inside the charge case, and a liner for retaining the explosive in the charge case, wherein the liner includes a material that can react with a component of an earth formation; detonating the shaped charge to form a perforation tunnel in a formation zone; and allowing the material comprising the liner to react with the component of the earth formation.

Shaped charges for creating enhanced perforation tunnel in a well formation

A perforating system having a perforating gun with a tubular gun housing defining an inner volume and extending in an axial direction. A shaped charge is held in a loading tube. The loading tube is located in the gun housing. The loading tube extends along the axial direction. The shaped charge faces in a firing direction substantially perpendicular to the axial direction. A portion of the gun housing adjacent to the shaped charge in the firing direction is a perforating portion for removal upon firing of the shaped charge. An eccentralizer member extends from the perforating gun in a second direction that is substantially opposite and parallel with the firing direction. A first retainer part extends from an outer surface of the gun housing adjacent to the perforating portion. A second retainer part extends from the outside of the gun housing adjacent to the perforating portion.

Method and apparatus for perforating with reduced debris in wellbore

A method of perforating a well includes selecting a desired transient underbalanced condition, configuring a perforating gun string to achieve the transient underbalanced condition, deploying the perforating gun is a wellbore, and firing the perforating to achieve the transient underbalanced condition.

Controlling transient underbalance in a wellbore

Wellbore perforating devices are disclosed. In one example, a wellbore perforating device includes a plurality of shaped charges and a holder that holds the plurality of shaped charges so that upon detonation the charges intersect a common plane extending transversely to the holder.

Wellbore perforating devices

A liner for a shaped charge is disclosed which comprises a plurality of portions, where at least one portion is composed of powder materials. In one embodiment, the liner comprises two portions that are composed of different powder materials, while alternative embodiments of the liner comprise three portions or four portions. When the shaped charge is used in a perforating gun, reactive powder materials may be added to the plurality of portions of the liner to optimize the penetration or the enhancement of the perforating tunnel.

Liner for shaped charges

A perforating device has an elongated tubular housing and a loading device supporting a plurality of shaped charges. The loading device and the shaped charges are located inside the housing. A volume reduction device is adapted to fit within the loading device and to conform to the profile of the shaped charges thereby filling open volume in the housing.

Perforating guns with reduced internal volume

An underbalanced perforating system is disclosed for use in openhole completions to maximize the wellbore and matrix cleanup efficiency, to connect natural fracture patterns, and/or to enable application of new drilling fluid technology in difficult subsurface environments. The perforating system can be used for any hydrocarbon bearing formations with any lithology.

Openhole perforating

Growing community of inventors

Houston, TX, United States of America

Lawrence A Behrmann