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8662182 Methods and apparatus for subsea well intervention and subsea wellhead retrieval  
The present invention generally relates to methods and apparatus for subsea well intervention operations, including retrieval of a wellhead from a subsea well. In one aspect, a method of...
8651192 Coiled tubing bottom hole assembly with packer and anchor assembly  
A bottom hole assembly (BHA), adapted to be positioned in a casing and to isolate a portion of a wellbore, which includes a packer assembly with a first sealing element extending between first and...
8651190 Shear boost triggering and bottle reducing system and method  
Systems can be configured to move a ram block in a blowout preventer. The system includes: a first bank of accumulators configured to provide a first pressure to move the ram block; a second bank...
8622132 Method of perforating a wellbore  
The present invention discloses a wellbore subassembly with a perforating gun. The wellbore subassembly includes a tubular body and a perforating charge. The tubular body has a wall defining an...
8622149 Ballistic transfer delay device  
A ballistic transfer delay device and method of use. The ballistic transfer delay device does not include a firing pin and it is not pressure initiated. The device comprises a time delay fuse, a...
8596378 Perforating safety system and assembly  
Perforating assemblies and perforating safety systems capable of being disposed in a wellbore for hydrocarbon fluid production are described. The perforating assemblies can include an isolation...
8590634 Subsea drilling  
A subsea cutting device for a subsea blow-out preventer or wellhead comprises a tubular body having an axial throughbore, and configured to be fitted to a casing string, the cutting device further...
8584756 Methods of isolating annular areas formed by multiple casing strings in a well  
A method of isolating annular areas formed by multiple well casings can include providing fluid communication through a wall of one of the casings at a location where another one of the casings...
8584763 Managing pressurized fluid in a downhole tool  
A wellbore apparatus includes a connector sub assembly having a body, the body having a first end adapted to couple to a first perforating sub component and a second, axially opposed end adapted...
8579022 Apparatus for deploying and activating a downhole tool  
An apparatus for deploying and activating a downhole tool activated by an explosive charge such as a drill pipe cutter or hole puncher. The apparatus includes a sealing member with an external...
8544563 Oil well perforators  
An oil and gas well shaped charge perforator capable of providing an exothermic reaction after detonation is provided, having a housing, a high explosive, and a reactive liner where the high...
8540024 Perforation strategy for heterogeneous proppant placement in hydraulic fracturing  
Hydraulic fracturing an individual reservoir fracturing layer of a subterranean formation to produce heterogeneous proppant placement is given in which pillars of proppant are placed such that the...
8540026 Wellbore laser operations  
Methods may include selecting a slot size of apertures to control sand production including formation fines in fluid from a subterranean zone. The slot size may be selected based on a distribution...
8534357 Wellbore laser operations  
Systems, methods, and apparatuses involve selecting an aperture geometry to filter solids from fluid from a subterranean zone, the aperture geometry selected based on a distribution of sizes of...
8534350 RF fracturing to improve SAGD performance  
A method of producing heavy oil from a heavy oil formation with steam assisted gravity drainage. The method begins by drilling a borehole into a heavy oil formation comprising a steam barrier...
8534957 Cold assisted pipe splitting and bursting  
A method and system for repairing, replacing or installing an underground pipeline using an appropriate tool head. A coolant, preferably a cryogenic liquid, is injected in front of the tool head...
8528643 Wellbore laser operations  
Methods, systems, and devices related to downhole wellbore operations such as drilling and completing wells in an earth formation include a laser device. For example, a method may include...
8490701 Methods of releasing at least one tubing string below a blow-out preventer  
A method of controlling a blowout comprises: releasing at least a first tubing string into a portion of a well system, wherein the step of releasing comprises activating a release table; and...
8490686 Coupler compliance tuning for mitigating shock produced by well perforating  
A method of mitigating perforating effects produced by well perforating can include causing a shock model to predict perforating effects for a proposed perforating string, optimizing a compliance...
8469089 Process and apparatus to improve reliability of pinpoint stimulation operations  
An anchor tool having a housing, a one-way restrictor device in fluid communication with the housing, and a stabilizer affixed to the housing. The one-way restrictor device is configured to allow...
8464794 Wellbore laser operations  
Methods, systems, and devices related to downhole wellbore operations, such as drilling and completing wells in an earth formation, include a laser device. A first portion of a subterranean...
8463585 Apparatus and method for modeling well designs and well performance  
In one aspect, a method of estimating fluid flow contribution from each producing zone of multi-zone production well is provided, which method may include: defining a wellhead pressure;...
8443886 Perforating gun with rotatable charge tube  
A perforating gun designed to orient a charge holding structure (e.g., tube, solid rod) within a barrel of the perforating gun to be at the same position relative to a wellbore casing regardless...
8439114 Method and apparatus for orienting perforating devices  
The present invention provides an apparatus and method of orienting perforating gun strings conveyed on a tool string. One embodiment of the present invention provides an orienting weight provided...
8424606 Method and apparatus for perforating with reduced debris in wellbore  
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...
8418761 Stimuli-responsive high viscosity pill  
A method comprises providing a treatment fluid having a first viscosity comprising an aqueous base fluid; a viscoelastic surfactant; and a stimuli-responsive water-soluble polymer; introducing the...
8408286 Perforating string with longitudinal shock de-coupler  
A shock de-coupler for use with a perforating string can include perforating string connectors at opposite ends of the de-coupler, a longitudinal axis extending between the connectors, and a...
8397800 Perforating string with longitudinal shock de-coupler  
A shock de-coupler for use with a perforating string can include perforating string connectors at opposite ends of the de-coupler, a longitudinal axis extending between the connectors, and a...
8397814 Perforating string with bending shock de-coupler  
A bending shock de-coupler for use with a perforating string can include perforating string connectors at opposite ends of the de-coupler. A bending compliance of the de-coupler may substantially...
8393392 Method and apparatus for perforating multiple wellbore intervals  
A bottom hole assembly for one trip perforating and treating a wellbore, the bottom hole assembly including: a tool body including an outer surface and an upper end; a fluid passage extending into...
8393393 Coupler compliance tuning for mitigating shock produced by well perforating  
A method of mitigating perforating effects produced by well perforating can include causing a shock model to predict perforating effects for a proposed perforating string, optimizing a compliance...
8381822 Managing pressurized fluid in a downhole tool  
A wellbore apparatus includes a connector sub assembly having a body, the body having a first end adapted to couple to a first perforating sub component and a second, axially opposed end adapted...
8365825 Suppressing voltage transients in perforation operations  
A perforating system includes a casing collar locator. The casing collar locator includes a coil. The perforating system includes a plurality of perforation charge elements. Each perforation...
8365824 Perforating and fracturing system  
A system for use in borehole completion is provided and includes a perforating sub, a firing sub having a first port and an interior and including a firing assembly disposable within the interior...
8356666 Wellbore perforation tool  
A wellbore perforation tool comprises an explosive charge, a tool body containing the explosive charge, and a flowable material carried with the tool. The flowable material is released by...
8347963 Controlling transient underbalance in a 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...
8347962 Non frangible perforating gun system  
A shaped charge assembly for use in a perforating gun that further comprises a charge carrier, and gun housing. The charge carrier substantially encapsulates the closed portion of the shaped...
8342094 Dissolvable material application in perforating  
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...
8336612 Severing of downhole tubing with associated cable  
Methods for severing a tubular string having a cable in association therewith can include lowering a cutting apparatus into the tubular string and actuating the cutting apparatus to form a cut in...
8327926 Method for removing a consumable downhole tool  
A method for providing a torch apparatus into a well bore for providing heat to a material that includes the step of inserting the torch apparatus into the well bore, such that a plurality of...
8307900 Method and apparatus for performing laser operations downhole  
The disclosure, in on aspect, provides a method for performing a laser operation in a wellbore that includes displacing a wellbore fluid with a laser-compatible medium proximate a location in the...
8302693 Wireless downhole tool positioning system  
A free falling drop sub carries an explosive tool such as a shaped charge pipe cutter or well perforator. The drop sub includes an aperture plugging element to isolate an upper pipe string from a...
8286706 Pressure compensation for a perforating gun  
A perforating system having a perforating gun with a pressurizable gun body. The gun body can be pressurized prior to deployment in a wellbore, or while in the wellbore. Pressurizing the gun body...
8276656 System and method for mitigating shock effects during perforating  
A perforating gun, according to one or more aspects of the present disclosure, comprises a loading tube and a plurality of charges mounted in the loading tube with at least a portion of the...
8272441 Wireless downhole tool positioning system  
A system for positioning a downhole tool along a pipe string, the system having a series of seating subs inserted along the length of the pipe string wherein each seating sub has a seating...
8256516 System and method for providing a downhole mechanical energy absorber  
A system and a method provide a downhole mechanical energy absorber that protects downhole tools from impact loads and shock loads that occur during run-in contacts, tool drops, perforating...
8245770 Method for perforating failure-prone formations  
By using reactive shaped charges to perforate failure prone formations, the present invention is able to keep formation sand in place and increase productivity. An efficient flow distribution is...
8235102 Consumable downhole tool  
A torch apparatus for consuming a material having a fuel load that produces heat and a source of oxygen when burned, and a plurality of slots having interstitial spaces therebetween for allowing...
8215397 System and method of dynamic underbalanced perforating using an isolation fluid  
A system for dynamic underbalanced perforation of a hydrocarbon well includes a perforation fluid located within the hydrocarbon well. A perforation gun is suspended within the perforation fluid...
8181699 Auxiliary conduit cutting apparatus  
A cutting assembly for external conduits on a tubing string features a breakaway in the string that can be severed with a tensile force. Preferably each external conduit is run through a cutter...