US Patents - Shaped Charges - Filed 1946 to 1958 Compiled by Noel Atzmiller

US Patents - Shaped Charges - Filed 1946 to 1958 Compiled by Noel Atzmiller Patent Filing Date Patent Title Inventor Assigner

2399211 March 1942 Method of Perforating Well Casings Clyde O. Davis DuPont

2605703 July 1944 Liner for Hollow Charges Walter E. Lawson DuPont

2494256 September 1945 Apparatus for Perforating Well Casings and Well Walls Morris Muskat Gulf Research and Development Company

2628559 February 1946 Explosive Drill Raymond Jasse Societe dite: Centre d’Etudes (Paris, France)

2587243 October 1946 Cutting Apparatus William G. Sweetman I. J. McCullough

2543814 December 1946 Means and Method of Tilting Explosive Charges in Wells W. H. Thompson WELEX, Inc.

2779278 February 1947 Apparatus for Perforating Well Casings Robert L. Klotz Jr. Borg-Warner Corporation

2630182 February 1947 Method for Shooting Oil Wells Robert L. Klotz, Jr. Seismograph Services Corporation

2649046 May 1947 Explosive Package Clyde O. Davis DuPont

2506836 June 1947 Device for Detonating Explosives in Oil Wells Lloyd H. Kaltenberger Lloyd H. Kaltenberger

2696169 April 1948 Shaped Charge Well-Pipe Perforator Joseph B. Lassiter, Jr. Phillips Petroleum Company

2669928 June 1948 Perforating Device for Wells William G. Sweetman William G. Sweetman

2595960 October 1948 Explosive Device Robert W. Lawrence Hercules Powder Company

2655619 October 1948 Selective Charge-Firing Equipment William E. Neal William E. Neal

2680406 March 1949 Explosive Container for Gun Perforators John L. Austin Jet-Guns Company, Inc.

2734456 April 1949 Gun Perforator William G. Sweetman William G. Sweetman

2662474 July 1949 Well Casing Perforator George F. Turechek Lane-Wells Company

2707917 July 1949 Well Casing Perforator Will H. Lindsay, Jr. Lane-Wells Company

2764938 September 1949 Open Hole Carrier Robert T. Harcus Borg-Warner Corporation

2687823 September 1949 Gun Perforator Port Seal Raymond A. Whitmore Lane-Wells Company

2750885 November 1949 Aligning Means for Shaped Charge Perforating Apparatus Marcel Schlumberger Borg-Warner Corporation

2764937 November 1949 Apparatus for Perforating Well Casings by Means of Shaped Charges Marcel Schlumberger Borg-Warner Corporation

2679898 November 1949 Oriented Gun Perforating Valoris L. Forsyth Lane-Wells Company

2708408 November 1949 Well Perforating Device William G. Sweetman William G. Sweetman

2797892 December 1949 Explosive Apparatus M. A. Ryan Phillips Petroleum Company

2742857 January 1950 Gun Perforators George F. Turechek Lane-Wells Company

2994269 March 1950 Liquid-Responsive Explosive Charge Firing System Disabler Marcel Schlumberger Borg Warner

2667836 March 1950 Apparatus for the Use of Shaped Explosive Charges Joseph H. Church Joseph H. Church

2629325 May 1950 Jet Type Perforating Unit William G. Sweetman William G. Sweetman

1 US Patents - Shaped Charges - Filed 1946 to 1958 Compiled by Noel Atzmiller

2749841 August 1950 Hydraulic Acting Jet Gun for Perforating Well Casings Edward N. Jones Edward N. Jones

2749840 September 1950 Gun Perforators for Wells Earl Babcock Esso Research and Engineering Company

2796023 September 1950 Small Guns for Perforating Casing Guss F. Abendroth Guss F. Abendroth

2690123 September 1950 Jet Gun Perforator for Wells William E. Kanady Standard Oil Development Company

2639770 September 1950 Small Gun for Perforating Casing in Oil Wells Theodore A. Huber Standard Oil Development Company

2664158 September 1950 Gun for Perforating Casing Jerome G. McKean Standard Oil Development Company

2705920 September 1950 Automatic Firing Systems for Gun Perforators for Wells W. E. Kanady Esso Research and Engineering

2785631 October 1950 Shaped Explosive-Charge Perforating Apparatus Andre Blanchard Borg-Warner Corporation

2756677 October 1950 Well Perforating Device Ira J. McCullough McCullough Tool Company

2724333 November 1950 Protective Apparatus for Perforating Well Casings and the Like Frederick R. Seavy Olin Mathieson Chemical Corporation

2759417 November 1950 Electric Blasting Cap and Perforating Gun Containing Said Cap John. J. O’Neill, Jr. Olin Mathieson Chemical Corporation

2765739 January 1951 Jet Carrier Sealing Plug Henry H. Mohaupt WELEX, Inc.

2853944 February 1951 Apparatus for Perforating Well Casing and the Like Harry S. Robertson Borg-Warner Corporation

2844098 February 1951 Apparatus for Supporting Explosive Charges in Jet Type Perforating Guns Jacques H. Castel PGAC Development Company

2792783 March 1951 Shaped Charge Perforator Jacques Delacour Borg-Warner Corporation

2946283 March 1951 Method and Apparatus for Perforating Wellbores and Casings John. J. Udry Borg-Warner Corporation

2833213 April 1951 Well Perforator John J. Udry Borg-Warner Corporation

2821136 April 1951 Firing System for Jet Type Perforating Gun Jacques H. Castel PGAC Development Company

2703053 April 1951 Firing Circuit for Perforating Guns Jacques H. Castel Perforating Guns Atlas Corporation

2849953 May 1951 Shaped Charges Adapted for Use Inside Well Casings Jacques Delacour Borg-Warner Corporation

2733657 June 1951 Apparatus for Forming Perforations in Wells Charles M. Bryant Dow Chemical Company

2833214 August 1951 Gun Perforator Lloyd Spencer Lloyd Spencer

2761383 August 1951 Non-Expendable Gun for Use in Jet Perforating William G. Sweetman William G. Sweetman

2833215 August 1951 Gun Perforator and Method of Manufacture Lloyd Spencer Lloyd Spencer

2947250 September 1951 Shaped Charge Assembly and Gun Henry H. Mohaupt WELEX, Inc.

2782715 October 1951 Well Perforator John J. Udry Borg-Warner Corporation

2796022 October 1951 Shaped Charge Perforating Apparatus for Use in Wells and the Like Jacques Delacour Borg-Warner Corporation

2750884 October 1951 Blasting of Underground Formations Tom Gaines The Texas Company

2766690 November 1951 System for Setting Off Explosive Charges Maurice P. Lebourg Borg-Warner Corporation

2760434 January 1952 Explosive John A. Ruth Olin Mathieson Chemical Corporation

2892407 January 1952 Shaped Cavity Explosive Charge Norman A. MacLeod Norman A. MacLeod

2926603 March 1952 Well Perforator Shaped Charge Will H. Lindsay, Jr. Borg-Warner Corporation

2689007 April 1952 Gun Perforator for Wells Frank A. Beyer, Jr. Halliburton Oil Well Cementing Company

2796833 May 1952 Perforating Devices William G. Sweetman William G. Sweetman

2947251 October 1952 Shaped-Charge Well Perforator Louis F. Jilly Borg-Warner Corporation

2984307 October 1952 Cutting Apparatus Charles H. Barnes Schlumberger Well Surveying Corporation

2811921 November 1952 Shaped Explosive Charge Apparatus With Adjustable Charge Spacing Glen R. Hodgson Borg-Warner Corporation

2947252 December 1952 Shaped Charge Unit for Well Perforators Will H. Lindsay, Jr. Borg-Warner Corporation

2837995 December 1952 Unsymmetrically Encased Shaped Explosive Charges Jacques H. Castel PGAC Development Company

2819673 January 1953 Method of and Apparatus for Opening Oil- and Gas-Bearing Strata Clyde J. Cecil Dow Chemical Company

2908222 May 1953 Apparatus for Detonating Shaped Explosive Charges Andre Blanchard Borg-Warner Corporation

2846948 June 1953 Oil and Gas Well Perforating Methods and Apparatus Maurice P. Lebourg Borg-Warner Corporation

2873675 June 1953 Method and Apparatus for Detonating Explosive Devices in Bore Holes Maurice P. Lebourg Borg-Warner Corporation

2799224 June 1953 Apparatus for Perforating Casing Thomas L. Long Johnston Testers, Inc.

2980017 July 1953 Perforating Devices Jacques H. Castel PGAC Development Company

3018730 July 1953 Perforating Guns Jacques H. Castel PGAC Development Company

2935020 August 1953 Apparatus for Cutting Holes in Well Casing George C. Howard WELEX, Inc.

2873676 August 1953 Multiple Shaped Charge Assembly Blake M. Caldwell WELEX, Inc.

2883931 December 1953 Detonator Claude A. Houck Borg-Warner Corporation

2843041 December 1953 Deep Perforation of Subsurface Formations Douglass M. Stewart Esso Research and Engineering Company

2851918 January 1954 Method of Forming Shaped Explosive Charge Norman A. MacLeod Norman A. MacLeod

3067678 February 1954 Tilting Charge Well Perforating Assembly Blake M. Caldwell Halliburton Company

2906339 March 1954 Method and Apparatus for Completing Wells W. H. Griffin W. H. Griffin

2818808 April 1954 Jet Perforating Gun Winnefred S. Dill Winnefred S. Dill

2859697 June 1954 Well Perforating Device Thomas L. Long Johnston Testers, Inc.

2867172 July 1954 Detonation of Unprimed Base Charges Joseph R. Hradel Joseph R. Hradel

2876843 August 1954 Gun Perforator Theodore A. Huber Jersey Production Research Company

3071072 August 1954 Perforating Apparatus Jacques H. Castel PGAC Development Company

2916991 August 1954 Jet Gun Bruce Gilbert The Western Company

2947253 September 1954 Perforator Manuel Cirilo Borg-Warner Corporation

3067679 October1954 Well Perforating Assembly and Perforating Unit Therefore Blake M. Caldwell Halliburton Company

2895554 November 1954 Method and Apparatus for Perforating Well Casings R. F. Krueger Union Oil Company

2955533 December 1954 Well Bore Perforating Apparatus Samuel J. Martinez, Jr. Dow Chemical Company

2831429 February 1955 Shaped Charge for Perforating Oil Well Casing Allen B. Moore The Moore Tool Company

2889775 February 1955 Open Hole Perforator Firing Means Harrold D. Owen WELEX, Inc.

3016014 May 1955 Perforating Apparatus Maurice P. Lebourg Schlumberger Well Surveying Corporation

2896721 August 1955 Through-Tubing Perforating Systems William R. Cannaday Dresser Industries, Inc.

3031964 August 1955 Well perforating Method and Means Therefore John D. Chesnut Aerojet-General Corporation

3021784 September 1955 Shaped Charge Unit for Well perforators Lorrain D. Meddick Borg-Warner Corporation

2883932 September 1955 Well Perforating Firing Means Blake M. Caldwell WELEX, Inc.

2912930 October 1955 Perforating Assembly Blake M. Caldwell WELEX, Inc.

2925775 December 1955 Well Casing Perforator Donovan S. McKee Borg-Warner Corporation

2980018 January 1956 Well Perforator Shaped Charge George F. Turechek Borg-Warner Corporation

2986089 January 1956 Debris-Free Perforating Gun Lorrain D. Meddick Borg-Warner Corporation

2927534 February 1956 Perforating Device and Method of Perforating Wells Jake H. LeBus PGAC Development Company

2988993 February 1956 Firing System for Well Perforator Guy C. Throner, Jr. Aerojet-General Corporation

3107611 March 1956 Well Perforating Assembly B. M. Caldwell Halliburton Company

3107612 March 1956 Well Perforating Assembly B. M. Caldwell Halliburton Company

2915011 March 1956 Stabilizer for Well Casing Perforator Robert B. Hamill WELEX, Inc.

2924173 June 1956 Well Perforator Firing Means John J. Robertson WELEX, Inc.

2952319 June 1956 Method of Vertically Fracturing Cased Wells J. L. Popham Continental Oil Company

3054938 June 1956 Means and Mode for Depositing Material by Jet Perforation Lorrain D. Meddick Dresser Industries

2928658 June 1956 Sidewall Sampler Keith H. Miner Dresser Industries. Inc.

2889773 July 1956 Detonator Head Harold E. Staadt Dow Chemical Company

2968243 July 1956 Tubing Gun George F. Turechek Borg-Warner Corporation

3235005 October 1956 Shaped Explosive Charge Devices Jacques Delacour Schlumberger, Paris, France

3019731 December 1956 Jet Perforator for Well Casings Edwin D. Edwards Advanced Oil Tools, Inc.

2889774 January 1957 Gun Perforator Thomas O. Allen Jersey Production Research Company

2960930 April 1957 Well Perforating Apparatus Frederick H. Bell Jet Research Center, Inc.

2981185 April 1957 Well Perforating Apparatus Blake M. Caldwell Jet Research Center, Inc.

3025794 May 1957 Perforating Apparatus Maurice P. Lebourg Schlumberger Well Surveying Corporation

2990773 May 1957 Apparatus for Perforating Well Casing Lester W. Toelke Great Lakes Carbon Corporation

2974589 June 1957 Jet Perforators Paul John Bryan DuPont

3013333 August 1957 Restoration Process William R. Burke DuPont

2960931 September 1957 Jet Perforating Assembly for Oil Wells John J. Douglass DuPont

3013491 October 1957 Multiple-Jet Shaped Explosive Charge Perforating Device Thomas C. Poulter Borg-Warner Corporation

3043379 October 1957 Formation Sampler Forrest V. Porter Lane-Wells Company

2965031 October 1957 Well Bore Detector and perforating Apparatus Earl Johns Seismograph Service Corporation

2976940 November 1957 Formation Sampler Milo Surbatovich Dresser Industries

2990774 December 1957 Retrievable Carrier for a Shaped Charge Perforator Lester W. Toelke Great Lakes Carbon Corporation

3121389 December 1957 Shaped Explosive Charge Apparatus Jacques Delacour Schlumberger, Paris, France

3110257 March 1958 Well Perforating Method and Apparatus Maurice P. Lebourg Schlumberger Well Surveying Corporation

3014424 March 1958 Shaped Explosive Charge Jacques Delacour Schlumberger, Paris, France

3040659 May 1958 Well Perforating Device Otis J. McCullough McCullough Tool Company

3077834 July 1958 Lined Shaped Explosive Charge and Liner Therefore Blake M. Caldwell Jet Research Center, Inc.

3128701 July 1958 Shaped Charge Perforating Apparatus John S. Rinehart The Western Company

3036521 July 1958 Bore Hole Perforating Apparatus Harrold D. Owen Go Oil Well Services, Inc.

3064571 October 1958 Perforator for Well Casing Martin E. True Jersey Production Research Company