Matches 1 - 49 out of 49


Match Document Document Title
US20120090843 HYDRAULIC JAR  
The invention relates to oil and gas industry and can be used in well drilling as a part of a Bottom Hole Assembly (BHA) to releasing stuck tools or equipment by applying axial and torque impacts....
US20150176357 Impact Sensing During Jarring Operations  
A jarring tool operable for coupling within and generating an impact imparted to a downhole tool string. The jarring tool includes an upper housing, a lower housing, and a shaft coupled with the...
US20090266544 SIGNAL OPERATED TOOLS FOR MILLING, DRILLING, AND/OR FISHING OPERATIONS  
Embodiments of the present invention generally relate to signal operated tools for milling, drilling, and/or fishing operations. In one embodiment, a mud motor for use in a wellbore includes: a...
US20090260822 BACKOFF SUB AND METHOD FOR REMOTELY BACKING OFF A TARGET JOINT  
A backoff sub includes a housing; and a backoff facilitator at least partially within the housing and capable of adding energy to a system within which the sub is disposable and method.
US20090166026 Jar device for use in coil tubing drilling  
The invention relates to a jar operated by fluid pressure, specially designed for use in drilling or maintenance operations carried out in oil or gas wells. The jar comprises a first (1) and a...
US20110146990 BACKOFF SUB AND METHOD FOR REMOTELY BACKING OFF A TARGET JOINT  
A backoff sub includes a housing; and a backoff facilitator at least partially within the housing. Capable of adding energy to a system within which the sub is disposable. A method for managing a...
US20150211317 Downhole Amplification Tool  
An exemplary embodiment of the amplification device generally includes amplification springs, complementary amplification spring seats for the respective ends of the amplification springs, and a...
US20070074867 Jar device  
A jar for use in a downhole environment comprises a mandrel, a spline body, and a tool body, where the spline body provides a slideable engagement with the mandrel and anvil surfaces for absorbing...
US20150129220 PUMP ACTUATED JAR FOR DOWNHOLE SAMPLING TOOLS  
An apparatus configured to impart a force on a downhole component, having a piston configured to expand from a movement of a drilling fluid in a downhole environment, a weight configured to move...
US20090308593 DOUBLE-ACTING JAR COMPOUNDER  
A double-acting jar compounder is disclosed having a first end and a second end, and comprising an outer housing, an upper mandrel, and a lower mandrel. The upper mandrel defines the first end....
US20120043073 Twin Latch Wireline Retrieval Tool  
The retrieving tool engages an equalizing sleeve on a jar down movement while the packer or bridge plug release sleeve is held fixed with a locking dog. The initial jarring down allows the tool to...
US20090301707 DOUBLE-ACTING JAR  
A double-acting jar comprises an inner mandrel and an outer housing. The inner mandrel is disposed telescopically within the outer housing to define a fluid chamber in between. There is an uphole...
US20150114643 WIRELINE DOWN JAR  
A jar assembly for use downhole includes a housing, a piston assembly slidable within and selectively coupled to the housing, a mandrel assembly coupled on a lower end of the piston assembly, and...
US20120298365 Compact Jar for Dislodging Tools in an Oil or Gas Well  
This invention relates to a jar used to dislodge tools stuck in a well. The jar includes two housing portions movable with respect to each other. A release collet forms a portion of one of the...
US20080149340 Jars for wellbore operations  
An example of an apparatus for jarring a wellbore tool from an obstruction includes four sub-assemblies in communication with three springs such that the springs may be compressed forcing the...
US20100258314 Jars for Wellbore Operations  
An example of an apparatus for jarring a wellbore tool from an obstruction includes four sub-assemblies in communication with three springs such that the springs may be compressed forcing the...
US20110000663 DEVICE FOR PLUG REMOVAL  
A device is described for removal of a plug which is used in a well, a pipe, or the like for carrying out tests, and it is characterised by an element which, with an applied forced, is arranged to...
US20090223676 Selective Agitation  
A fluid actuated downhole tool for inducing movement of a downhole apparatus is described. The tool comprises a body for coupling to downhole apparatus, the body being adapted to accommodate now...
US20090025928 DOWN HOLE TOOL WITH ADJUSTABLE FLUID VISCOSITY  
A down hole tool includes a tool body, a fluid cavity, a magnetorheological fluid disposed in the fluid cavity, and an electrical control unit in communication with the MR fluid. The electrical...
US20110220345 Dual Acting Locking Jar  
A double action locking jar is operable to provide a jarring force in an upward or downward direction. A pair of pressure pistons form a pressure chamber in which a Belleville spring stack is...
US20150204153 Change-Over Arrangement for a Cable Operated Jar  
A cable-operated jar comprising a releasable coupling is arranged for connection to a piece of downhole equipment, in which a mandrel is connected to a cable comprising a hammer section. The...
US20140196911 ELECTROMAGNETICALLY ACTIVATED JARRING  
An impact apparatus conveyable in a tool string within a wellbore comprises a mandrel, a first impact feature, and a latch pin retainer encircling an end of the mandrel. A release sleeve encircles...
US20120227970 Jarring Method and Apparatus Using Fluid Pressure to Reset Jar  
A method and apparatus for delivering repetitive jarring impacts to a stuck object downhole. The jarring tool is deployed on coiled tubing or other tubular well conduit, and fluid pressure is used...
US20110132598 DOWNHOLE JARRING TOOL WITH REDUCED WEAR LATCH  
A jarring tool having an extensible joint connecting first and second sub ends is disclosed. A first inner latch piece connects to the upper sub end, and a second outer latch piece connects to the...
US20100126710 Stroker Tool  
A stroker tool for providing an axial force in an axial direction of a downhole tool. The stroker tool has a pump, a driving unit for driving the pump, and an axial force generator. The generator...
US20130277057 Hydraulic/Mechanical Tight Hole Jar  
A jar comprises a housing including an anvil. In addition, the jar comprises a mandrel telescopically disposed within the housing and including a hammer. Further, the jar comprises an annular...
US20120018144 JAR WITH IMPROVED VALVE  
A jar is disclosed comprising: an outer housing; an inner mandrel at least partially disposed telescopically within the outer housing to define a fluid chamber between the inner mandrel and the...
US20110132597 DOWNHOLE JARRING TOOL  
A tool having a first lower sub end, a second upper sub end, and an extensible joint connecting the first and second sub ends is disclosed. The joint has a first inner latch piece connected to the...
US20130168092 Double-Acting Shock Damper for a Downhole Assembly  
A downhole assembly, including a downhole tool, a downhole force-creating device, and a shock damper. The shock damper includes a hollow housing including an annular shoulder near each end and...
US20100307739 Double-Acting Jar  
A double-acting jar is disclosed comprising: an outer housing; an inner mandrel at least partially disposed telescopically within the outer housing to define a fluid chamber between the inner...
US20090095490 Electrically activating a jarring tool  
A method of using jarring tool in a wellbore, where the jarring tool is electrically activated to apply an impact force transmitted to at least another tool in the well. The method may further...
US20120160477 LARGE BORE JAR FOR A DRILL STRING  
A drill string includes a bit sub mounted to a lower end of a plurality of tubular sections, where at least one tubular section is a jar. The jar and the tubular sections have an inner diameter...
US20120222857 ASSEMBLY  
A transport assembly comprising: an attachment member attachable to a downhole tool; normally two rotatable members, connected to the attachment member, the rotatable members being arranged to...
US20140014321 Assembly  
A downhole transport assembly (100, 101) having first and second members (10, 20) having a common longitudinal axis, at least one of the members (10, 20) being rotatable about the longitudinal...
US20110011588 Tension-Activated Fluid Bypass Device  
A fluid bypass tool that can be incorporated into a fishing arrangement between a fluid-operated latching tool and a fluid-operated jarring tool. The latching tool is actuated with fluid from the...
US20090194285 METHOD FOR JARRING WITH A DOWNHOLE PULLING TOOL  
The present invention generally relates to an apparatus and method of jarring with an overpull generator. In one aspect, a method of dislodging an object stuck in a wellbore is provided. The...
US20110030944 JARRING TOOL WITH MICRO ADJUSTMENT  
A jarring tool is disclosed. The tool has a segment of sub housing containing an upper stop proximate a first end thereof. An outer latch piece is connected to an upper end of the lower shaft...
US20130062052 PRESSURE LOCK FOR JARS  
Embodiments disclosed herein relate to a jar including the following: a mandrel; an outer housing slidably disposed about the mandrel; a ball stop housing disposed below the outer housing; a lower...
US20100206568 Devices, Systems and Methods for Equalizing Pressure in a Gas Well  
Devices, systems and methods for equalizing pressure in a gas well are provided. A jar device is coupled to a pump deployed in a gas well between areas of low pressure and high pressure. The jar...
US20170175475 JARRING USING CONTROLLABLE POWERED BIDIRECTIONAL MECHANICAL JAR  
A method for jarring allowing the operator to selectively control the jarring force while the tool is downhole and a powered bidirectional mechanical jar therefor, is disclosed. The jar includes a...
US20170089160 Non-Releasing Anchor Tool when Jarring Up on a Stuck Subterranean Tool Component  
A grip a no goes in a subterranean tool to properly position grip members held radially outward with a cone on delivery of an uphole force. In the case of a subsurface safety valve that has a flow...
US20160237771 Release Lugs for a Jarring Device  
A release mechanism for a jarring tool is formed by a plurality of segmented release lugs. Each lug includes a plurality of axial spaced projections on an inner surface and a plurality of grooves...
US20160230489 Predetermined Load Release Device for a Jar  
A release device for a jarring tool includes a collet positioned between the mandrel of the jarring tool and a trigger sleeve. At least one end of the collet is in contact with a precompressed...
US20160145959 Flow Restricted Impact Jar  
An apparatus for coupling between opposing first and second portions of a downhole tool string. The apparatus includes a housing having a port therein, a shaft extending within at least a portion...
US20160102515 Hydraulic Impact Apparatus and Methods  
A hydraulic jar coupled between opposing first and second portions of a downhole tool string. The hydraulic jar includes a housing comprising a shoulder protruding radially inward from an internal...
US20160102514 DOWNHOLE IMPACT GENERATION TOOL AND METHODS OF USE  
Disclosed is an impact generation tool used to deliver a large downhole impact force. The impact generator may include a housing having an uphole end and a downhole end and defining a chamber...
US20160032673 PRESSURE LOCK FOR JARS  
Embodiments disclosed herein relate to a jar including the following: a mandrel; an outer housing slidably disposed about the mandrel; a ball stop housing disposed below the outer housing; a lower...
US20150361751 Jarring Tool  
A jarring tool that includes a first portion and a second portion. An impact point is located between the first portion and the second portion. The jarring tool has an internal energy source that...
US20150267494 HYDRAULIC JAR AND A FLOW CONTROL DEVICE USABLE IN THE HYDRAULIC JAR  
A hydraulic jar comprising a housing and a mandrel slidably disposed in the housing forming an annular space therebetween. In an embodiment, the hydraulic jar comprises a flow control device...

Matches 1 - 49 out of 49