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8118099 |
Method and apparatus for forming and sealing a hole in a sidewall of a borehole
A method for forming and sealing a hole in a sidewall of a borehole may include conveying a bit and a sealer into the borehole using a carrier, forming a hole in the sidewall using the bit, and...
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7918280 |
Radial indexing communication tool and method for subsurface safety valve with communication component
A communication tool apparatus is described which is adapted to provide selective communication of control fluid through a downhole tool, such as a safety valve. The downhole safety valve is a...
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7909100 |
Reversible casing cutter
Casing cutter for severing multiple tubulars in a well bore has a pair of cutter blades pivotally mounted on a support body. The blades are pivotally mounted for gradual movement outside of the...
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7878242 |
Interface for deploying wireline tools with non-electric string
Embodiments of the present invention generally relate to a method and/or apparatus for deploying wireline tools with a non-electric string. In one embodiment, a method of determining a free point...
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7861783 |
Method for adapting a tubular element in a subsiding wellbore
A method for adapting a tubular element extending into a wellbore formed in an earth formation, where the tubular element is susceptible to damage caused by axially compressive forces acting on the...
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7708077 |
Retrieval of bottom hole assembly during casing while drilling operations
A bottom hole assembly in a casing-while-drilling operation is retrieved attaching a wireline to the bottom hole assembly. The density of the fluid in the casing string is lightened to a lesser...
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7644763 |
Downhole cutting tool and method
Disclosed herein is a downhole cutting tool. The downhole cutting tool including, a cutting member mounted on a rotatable shaft, a shaft-deflecting device in operable communication with the shaft,...
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7588101 |
Radially expandable downhole fluid jet cutting tool having an inflatable member
Downhole fluid jet cutting tools having extendible and retractable arms with cutting heads on the ends are disclosed. The jet cutting tools permit casing and other downhole surfaces to be cut...
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7383876 |
Cutting tool for use in a wellbore tubular
An apparatus and method of determining the point at which a tubular is stuck within another tubular or a wellbore by applying a tensile or torsional force to the stuck tubular and measuring the...
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7370703 |
Downhole hydraulic pipe cutter
The casing cutter disclosed herein is useful for severing downhole tubulars and comprises a body, slips, a cutting head, cutting blades, and actuators for operating the cutting head and cutting...
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7108064 |
Milling tool insert and method of use
The present invention generally relates to a cutting insert for use with wellbore milling tools. The cutting insert forms an angle between a milling surface of the insert and a surface of the tool...
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7036600 |
Technique for deploying expandables
A technique for deploying expandables is provided. The technique comprises actuating an expansion tool such that the expansion tool imparts an outwardly directed radial force on an expandable...
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7004257 |
Apparatus and methods for separating and joining tubulars in a wellbore
The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided...
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6920923 |
Section mill for wells
A section mill for casings used in oil wells to cut predetermined portions for repair purposes. An elongated cylindrical assembly is inserted through the casing and it includes at least two spaced...
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6805197 |
Hydraulic wireline cutter
A combination tool for attaching to a stuck wireline tool, then cutting the wireline just above the stuck tool with a hydraulically driven cutter, allowing the wireline to be pulled out of the hole...
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6702009 |
Select-fire pressure relief subassembly for a chemical cutter
A downhole chemical cutter (12) has first and second passages (124, 126) which extend parallel, in fluid communication with an interior passage (32). A first ignitor (210) in the first passage...
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6695063 |
Expansion assembly for a tubular expander tool, and method of tubular expansion
An improved expansion assembly for an expander tool is provided. The expander tool is used to expand a surrounding tubular body within a wellbore. The expansion assembly first comprises a piston...
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6679328 |
Reverse section milling method and apparatus
A method and apparatus for milling a section of casing in an upward direction, utilizing a downhole hydraulic thrusting mechanism for pulling a section mill upwardly. A downhole motor and torque...
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6668930 |
Method for installing an expandable coiled tubing patch
The present invention provides methods for expanding coiled tubing within a wellbore in order to form a patch. In one aspect, an expansion assembly is run into the wellbore at the lower end of a...
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6637508 |
Multi-shot tubing perforator
A perforator apparatus for repeated punching of holes at a multiple of selected locations in tubing of a well bore. The apparatus is activated for repeated punching operations by a fluid control...
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6629567 |
Method and apparatus for expanding and separating tubulars in a wellbore
An apparatus and method for expanding a lower string of casing into frictional contact with an upper string of casing, and thereby hanging the lower string of casing onto the upper string of casing...
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6615933 |
Downhole tool with extendable members
A downhole tool (10) for mounting on a drill string comprises: a mandrel (16); a body (18) axially movably mounted on the mandrel; and radially extendable members, such as stabiliser blades or...
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6581690 |
Window cutting tool for well casing
The present invention provides an active downhole cutting tool guide device 14 for use in a hole 17 with sides between which a hole-cutting tool 15 mounted on a drill string and provided with said...
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6478088 |
Method for the formation of a plug in a petroleum well
The invention relates to a method for the formation of a plug (1) in a petroleum well (2) extending from the earth's surface or the sea floor to a petroleum reservoir, which well is lined with...
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6439313 |
Downhole machining of well completion equipment
A method of machining a workpiece in a subterranean wellbore comprises the steps of: (a) providing a workpiece that comprises (1) a first section that comprises a first material, and (2) a second...
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6357528 |
One-trip casing cutting & removal apparatus
A one-trip system for removing casing from a wellhead is described. The string includes a cutting device spaced at the required depth and a grappling device above it at the appropriate location. A...
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6076601 |
Collapsible cutter apparatus and method for cutting tubular members
In accordance with the present invention, a collapsible cutter assembly is provided that utilizes opposing collapsible assemblies having explosive charges coupled thereto. The collapsible cutter...
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5951221 |
Apparatus for in-pipe use
Apparatus for cutting a hole through a plastic liner in a gas or other main comprises a body forming module of a train of modules adapted to travel through the main. The body has a radially movable...
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5862870 |
Wellbore section milling
Section mills have been invented that have one or more blades one or more of whose tops are pivotably extendable outwardly from a mill body as bottoms of the blade(s) rotate about a fixed point,...
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5791409 |
Hydro-mechanical multi-string cutter
A downhole cutting tool for use in a wellbore, the cutting tool having a mandrel and a cylindrical knife body slidably mounted coaxially on the mandrel. The mandrel can be attached to or suspended...
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5758723 |
Fluid pressure deactivated thru-tubing centralizer
A thru-tubing centralizer 10, 102 positioned along a tubular T after passing through a small diameter tubing string TS centralizes the tubular within a large diameter casing string CS. The...
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5732770 |
Wellbore cutter
A new wellbore cutter has been invented which, in certain embodiments has a piston having a fluid flow bore therethrough, at least one stabilizer kick-out member, and at least one cutting blade...
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5642787 |
Section milling
Section mills have been invented that have one or more blades whose tops are rotatably extendable outward from a mill body as bottoms of the blade(s) rotate about a fixed point, the blade bottoms...
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5425424 |
Casing valve
An apparatus and method for producing through a casing without perforation are disclosed. The casing can be rotated while it is cemented and includes a multiplicity of sliding sleeve valves. Each...
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5385205 |
Dual mode rotary cutting tool
A downhole rotary cutting tool having an elongated cylindrical body with radially expanded cutting blades that are controlled by application of selected fluid as controlled from a surface source....
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5350015 |
Rotary downhole cutting tool
A downhole rotary cutting tool used with a rotational motor sub and powered by fluid pressure consisting of an elongate body housing having an axial piston cavity and plural, equi-spaced cutter...
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5318395 |
Method and apparatus for porting lateral connections in lined pipelines
A method and apparatus for porting lateral connections in a lined pipeline from the lateral side of the liner. An access hole is formed through the liner material covering the lateral connection. A...
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5318115 |
Casing cutting and retrieving tool
A casing cutting and retrieving tool is described which includes a grapple device (2) for mechanically gripping casing to be retrieved. A mud motor having upper and lower stators (70, 73) and a...
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5303776 |
Device for a down-hole assembly
A wireline conveyable device for a fluid operable borehole tubing assembly comprising a tubular body having a first end intended to form the upper end when in the borehole and a second open end...
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5265675 |
Well conduit cutting and milling apparatus and method
A well conduit cutting and milling apparatus conveyable into and out of a well on coilable tubing using a tubing injection unit. The apparatus includes tubing or casing cutting arms which are...
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5242017 |
Cutter blades for rotary tubing tools
The invention consists of the shape and design of plural pairs of cutter blades for use in rotary tubing tools which cutter blades have specialized shapes and cutting surfaces for performing...
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5201817 |
Downhole cutting tool
A downhole cutting tool for use down along a tubing string consisting of an elongate body member having central cavity and transverse slotway and receiving drilling fluid axially therethrough. An...
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5197540 |
Boring device for lining material in branched portions of lined conduit
The present invention relates to a boring device adapted to bore the lining material blocking a branched portion where there is an opening for connecting a main pipeline with a branched pipeline...
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5174374 |
Clean-out tool cutting blade
A dual blade cutter head for a rotary cutting tool which consists of two identical blades disposed in opposed position, each blade having an outer arcuate edge movable into cutting contact and...
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5101895 |
Well abandonment system
A remedial bottom hole assembly for casing retrieval is disclosed having a spear and an inflatable packer utilized in combination with a pipe cutter. With such an assembly, after the spear is set...
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5090480 |
Underreamer with simultaneously expandable cutter blades and method
An underreamer tool has a body with upper and lower portions having an upper cutter blade slot extending transversely through the upper portion and a lower cutter blade slot extending transversely...
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5060738 |
Three-blade underreamer
An underreamer tool has a generally cylindrical body with a threaded top end for connection to a tubing string, a threaded lower portion to receive a drill bit, and a longitudinal fluid passageway...
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5036921 |
Underreamer with sequentially expandable cutter blades
An underreamer tool has a body with upper and lower portions having an upper cutter blade slot extending transversely through the upper portion and a lower cutter blade slot extending transversely...
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5018580 |
Section milling tool
A milling machine is set forth for operation on a pipe string in a cased well to mill the casing. In one embodiment, an inner mandrel having a shoulder is aligned relative to a set of first cutters...
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5014780 |
Long distance section mill for pipe in a borehole
A milling apparatus is disclosed. The structure includes first and second upper subs threading together and having an inner axial passage. A long stinger fits in this passage and connects with a...
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