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Match Document Document Title
8157022 Apparatus string for use in a wellbore  
An apparatus string for use in a wellbore has a plurality of activation modules having first and second ends and containing devices to be activated/initiated downhole. An apparatus string also has...
8074737 Wireless perforating gun initiation  
A perforating system and method for wellbore perforating. The system comprises a perforating string having a perforating gun with shaped charges, a communication module for receiving detonation...
7980309 Method for selective activation of downhole devices in a tool string  
A system (100) for selective activation of explosive devices (126, 128, 130, 132) includes a surface controller (102), a downhole controller (106) operable to communicate bidirectionally with the...
7975592 Perforating apparatus, firing assembly, and method  
An apparatus for perforating a casing string including a first module and a second module, each including a gun assembly. The first module is positioned longitudinally adjacent the second module on...
7909115 Method for perforating utilizing a shaped charge in acidizing operations  
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 is fabricated from a material...
7621342 Method for retaining debris in a perforating apparatus  
A perforating apparatus (100) includes a plurality of shaped charges (102) each having an initiation end and a discharge end. A detonating cord (116) is operably coupled to the initiation ends of...
7461580 Casing conveyed well perforating apparatus and method  
Disclosed is a casing conveyed perforating system and methods for externally perforating a wellbore and casing. The perforating system is attached to the outside of the casing and is conveyed along...
7430965 Debris retention perforating apparatus and method for use of same  
A perforating apparatus (100) includes a plurality of shaped charges (102) each having an initiation end and a discharge end. A detonating cord (116) is operably coupled to the initiation ends of...
7350448 Perforating apparatus, firing assembly, and method  
A firing assembly for activating a perforating device comprising a module having a first chamber and a second chamber. The firing assembly comprises a firing head for transferring ballistic energy...
7347278 Secure activation of a downhole device  
A system includes a well tool for deployment in a well, a controller, and a link coupled between the controller and the well tool. The well tool comprises plural control units, each of the plural...
7172023 Perforating gun assembly and method for enhancing perforation depth  
A perforating gun assembly (110) for creating communication paths for fluid between a formation (114) and a cased wellbore (116) includes a housing, a detonator and a detonating cord (136). The...
6877562 Oil well perforator  
This invention relates to the field of oil wells and in particular to the explosive and other devices that are used to perforate oil well casings and hydrocarbon bearing rocks in order to create...
6758124 Unique phasings and firing sequences for perforating guns  
A unique phasing pattern is provided that maximizes the effective perforation geometry of a wellbore. The improvement overcomes the problems associated with multi-phase guns of the past that failed...
6675896 Detonation transfer subassembly and method for use of same  
A detonation transfer subassembly for coupling two detonation activated tools in a work sting such that the work string may be severed between the two detonation activated tools without risk of a...
6604584 Downhole activation system  
A tool activating system includes a multiple control units coupled to activate devices in a tool string positioned in a well. A processor is capable of communicating with the control units to send...
6523449 Perforating gun  
A technique includes arranging perforating charges of a perforating gun into groups of adjacent perforating charges. Each perforating charge of each group is aligned in a direction associated with...
6283227 Downhole activation system that assigns and retrieves identifiers  
A tool activating system includes multiple control units coupled to activate devices in a tool string positioned in a well. A processor is capable of communicating with the control units to send...
5388521 Method of reducing ground vibration from delay blasting  
A formation is blasted with one or more arrays of elongated, chemical, explosive charges so as to produce relatively low levels of ground vibration. The orientation and velocity of propagation of...
5278359 Simple multishot downhole explosive tool  
A downhole seismic acoustical signal source capable of selectively firing numerous, prewired explosive charges. The downhole seismic source has a firing system that uses a sequence of combinations...
5107929 Drop off method for perforating gun capsule charge carriers  
A novel dropoff apparatus adapted for use in a perforating gun or other such apparatus adapted to be disposed in a borehole includes an embrittled carrier section connected to a further section of...
5103912 Method and apparatus for completing deviated and horizontal wellbores  
A method of completing a well is provided which utilizes a primary tool string and a secondary tool string. The primary tool string will include apparatus such as perforating guns and associated...
5042594 Apparatus for arming, testing, and sequentially firing a plurality of perforation apparatus  
A perforating gun apparatus comprises a plurality of perforating gun, each gun containing at least one charge and a novel arming, testing and firing apparatus. The arming, testing and firing...
5022485 Method and apparatus for detonation of distributed charges  
A method and apparatus for geophysical exploration wherein a seismic wave is passed through a bore hole so at to sequentially detonate a plurality of explosive charges disposed within said bore...
5007344 Dual firing system for a perforating gun  
A unitary dual firing assembly includes a high explosive detonation cord with ends, each actuable by a different firing mechanism. The ends of the high explosive detonation cord are adjacent...
4960171 Charge phasing arrangements in a perforating gun  
Various charge phasing arrangements in a perforating gun include those uniquely associated with phasing solely along a 180 degree circumference of the perforating gun, for use in but not limited to...
4895218 Multishot downhole explosive device as a seismic source  
A downhole seismic acoustical signal source capable of selectively firing numerous, prewired explosive charges. The downhole seismic source uses a self-contained firing circuit that is capable of...
4832134 Shaped charge assembly with retaining clip  
A shaped charge assembly includes at least one shaped charge having an outer case. The case has a forward end and a rearward end, and has a flange defined thereon. A retaining clip is operably...
4673033 Tubing conveyed perforating assembly safety device  
For use in a tubing conveyed perforating gun assembly, the assembly including N shaped charges, a safety device is disclosed. In the preferred and illustrated embodiment, the safety device includes...
4656944 Select fire well perforator system and method of operation  
A well perforator system and method employs an electromagnetic wave frequency receiver, one for each of at least two gun intervals, that receives a transmitted signal conveyed through well tubing...
4648471 Control system for borehole tools  
A method and apparatus for controlling a borehole tool, which tool has been conveyed into the borehole on production tubing. Apparatus includes a downhole control module connected to the tool for...
4635734 Boosterless perforating gun and method of assembly  
A method and apparatus for effecting the assembly and arming a multisection perforating gun for a subterranean well. Each of the gun sections has a plurality of vertically and angularly spaced...
4598771 Method and apparatus for firing a perforating gun and simultaneously recording the downhole pressure  
An improved downhole pressure measuring apparatus includes a flow tube conveying pressurized fluid from a fluid source on the surface into a borehole. The fluid flow and pressure is measured at the...
4552234 Spiral gun apparatus  
A perforating gun for use in well bores and having a perforating means disposed in a azimuthal dispersion pattern about a vertical axis where the dispersion is characterized by azimuthal spacing of...
4527636 Single-wire selective perforation system having firing safeguards  
A method and system for selecting and arming each of a plurality of firing modules in a single-line selective perforating system is disclosed. A single firing line connects each firing module one...
4498391 Explosive mine breaking apparatus with arc-suppressing heat-dissipating fluid around the charge bodies  
Steep dip strong-coal deposits can be broken in an explosive mine environment utilizing a succession of explosive units each of which comprises a core tube surrounded by a body of explosive...
4496010 Single-wire selective performation system  
A method and system for selecting and arming each one of a plurality of firing modules in a single-line selective perforating system is disclosed. A single firing line connects each firing module...
4457383 High temperature selective fire perforating gun and switch therefor  
A multiple shot selective fire perforating gun is provided for piercing oil field tubular goods, typically during the process of completing an oil or gas well. The perforating gun includes a...
4454814 Select-fire systems and methods for perforating guns  
The invention relates to improved systems and methods for selectively firing perforating guns in well bores and is concerned primarily with the production of a positive confirmation to the effect...
4324310 Seismic apparatus  
A high resolution seismic data acquisition system is made up of an electronically-fired shotgun source integrally connected to a detector-recording means displaced from the shotgun source.
4208966 Methods and apparatus for selectively operating multi-charge well bore guns  
In the representative embodiments of the new and improved methods and apparatus disclosed herein for controlling multicharge perforating guns or core-sampling guns, the gun-control system of the...
4164886 Sealing projectile  
An improved sealing projectile for use in a borehole perforating tool of a type wherein there is an explosive charge such as one or more shaped charge units disposed in each of a plurality of...
4140188 High density jet perforating casing gun  
A high density perforating gun having series connected multiple gun housings within which a plurality of jet perforating shaped charges are arranged in spaced apart clusters. The charges of each...
4100978 Technique for disarming and arming electrically fireable explosive well tool  
There is disclosed a single wire multiple shot selective fire perforating gun for piercing oil field tubular goods, typically during the process of completing an oil or gas well. A switch in the...
4089381 Chamber isolator and sealing means for borehole perforating tools  
Improved end closures for shaped charge unit chambers in borehole perforating tools have flanged peripheral portions to be clamped in the threaded joint when sidewalls of adjacent chambers are...
4066994 Well data telemetry by explosions  
A data telemetry system for use in a plugged exploratory borehole to transmit measurements of subsurface conditions after long delays by use of seismic waves. The system includes a sensor for...
4051907 Selective firing system  
Selective firing system for gun perforating comprising in combination a surface control, and a subsurface master sub together with a multiplicity of identical slave subs each operatively connected...
4030557 Well drilling apparatus and method  
Well drilling rates may be increased by impelling projectiles to fracture rock formations and drilling with rock drill bits through the projectile fractured rock.
4011815 Safe-handling arming apparatus for perforating guns  
In the representative embodiments of the safe-handling arming apparatus of the present invention disclosed herein, a spring-biased indicator is cooperatively arranged on an enclosed-carrier...
4007796 Explosively actuated well tool having improved disarmed configuration  
There is disclosed a single wire multiple shot selective fire perforating gun for piercing oil field tubular goods, typically during the process of completing an oil or gas well. A switch in the...
3923107 Well bore perforating apparatus  
In the representative embodiment of the present invention disclosed herein, new and improved selectively-operated perforating apparatus is arranged to include two or more enclosed thin-walled...
Matches 1 - 50 out of 77 1 2 >