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8146685 |
Methods and apparatus for drilling, completing and configuring U-tube boreholes
A borehole network including first and second end surface locations and at least one intermediate surface location interconnected by a subterranean path, and a method for connecting a subterranean...
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8069920 |
Lateral well locator and reentry apparatus and method
A down-hole assembly used to locate an existing window in a main cased well bore and guide equipment through the window and into a lateral well bore after removal of a whip stock. The assembly...
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8025105 |
Downhole tool retrieval and setting system
Apparatuses and methods for retrieving a downhole tool from a wellbore are provided. The method includes running a retrieval tool into a wellbore on a conveyance. The retrieval tool configured to...
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7997336 |
Method and apparatus for retrieving an assembly from a wellbore
A method and apparatus for retrieving an assembly having a whipstock and an anchor from a wellbore. A method of retrieving an assembly having a whipstock coupled to an anchor from a wellbore may...
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7980307 |
Downhole window finder system
An apparatus for finding a pre-existing downhole window includes a body having a deflector ramp and a cavity, and an extendable dog disposed in the cavity, the dog mechanically moveable between a...
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7967075 |
High angle water flood kickover tool
A kickover tool for placing and extracting a valve in a mandrel having a hydraulic piston, a kickover arm portion mechanically connected to the hydraulic piston, the kickover arm portion being...
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7934563 |
Inverted drainholes and the method for producing from inverted drainholes
A method and apparatus for creating inverted laterals or drainholes for producing from a subterranean reservoir including the steps of lowering, positioning and securing a reverse whipstock in a...
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7886835 |
High angle water flood kickover tool
A kickover tool is for placing and extracting a valve in a mandrel having a tool body extending in a longitudinal direction and having a hydraulic piston chamber therein. A hydraulic piston is...
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7878253 |
Hydraulically released window mill
An affixation and release arrangement includes a first component having a fluid pressure chamber. A piston is mounted in the first component and exposed to the fluid pressure chamber. A second...
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7878270 |
Methods and apparatus for drilling, completing and configuring U-tube boreholes
A borehole network including first and second end surface locations and at least one intermediate surface location interconnected by a subterranean path, and a method for connecting a subterranean...
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7814972 |
Wireline entry sub
A wireline entry sub includes a body having an upper end, a lower end and a longitudinal, center axis therebetween. The body is adapted for connection below a top drive to a wellbore string of...
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7770634 |
Gas lift apparatus for flushing and snubbing well
A gas lift production apparatus is provided for use in flushing and snubbing well operation. The apparatus comprises upper production string and lower production string. The upper production string...
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7726401 |
Casing exit joint with easily milled, low density barrier
A casing exit joint with an easily milled and low density barrier. A casing exit joint for use in drilling a lateral wellbore outwardly from a parent wellbore includes a generally tubular window...
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7690443 |
Apparatus, system, and method for casing hole formation in radial drilling operations
The present application is directed to an apparatus for forming one or more holes in a wellbore casing, the apparatus comprising a deflector assembly and a drive assembly to drive said deflector...
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7669664 |
Apparatus and method for opening and closing lateral boreholes
The present invention relates to a downhole tool (102) for selectively opening and closing a lateral borehole extending from a primary borehole. The tool (102) comprises a body (104) incorporating...
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7640985 |
Methods of directional drilling and forming kickoff plugs using self-degrading cement in subterranean well bores
Methods of drilling a well bore in a subterranean formation comprising placing a self-degrading kickoff plug or the like in the well bore are provided. An example of a method is a method...
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7637319 |
Kickoff plugs comprising a self-degrading cement in subterranean well bores
Degradable kickoff plugs are provided. An example of a composition is a degradable kickoff plug that includes a degradable material; and an acid-base cement. Another example of a composition is a...
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7610971 |
One trip milling system and method
A sidetracking system has a pair of serially connected mills (8,9), each having a plurality of circumferentially arranged blades having a tapered cutting portion (82,93) thereon for cutting a...
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7575049 |
Exit window milling assembly with improved restraining force
An assembly for milling a window in a tubular features a layout that keeps a restorative force normal to the whipstock slope acting on the window mill to help it track the whipstock ramp long...
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7506699 |
Directional drilling tool
A directional drilling tool comprising an orientation spear point having a spear axis. The orientation spear point comprises an end shaft with a threadable extension disposed along the spear axis...
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7506700 |
Method for steering mud motors and retrieving measurement while drilling devices
A method for steering a steerable mud motor while attached to a retrievable replaceable measurement while drilling device comprising: securing a directional drilling tool to a retrievable...
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7487847 |
Lateral downhole drilling tool
A flexible lateral drilling shaft is disclosed, having a concentrically nested arrangement of two or more coil springs of which the winding direction of at least one of the springs is opposite to...
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7451810 |
Kickover tool and selective mandrel system
A kickover tool is disclosed for installing and retrieving a well flow control device from a side pocket mandrel in a wellbore. The kickover tool includes a spring-loaded key which has an outer...
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7422057 |
Whipstock with curved ramp
The whipstock face below the mounting lug is initially curved with a fairly long radius to protect the whipstock body initially. After moving down the minimally sloping curved face a transition to...
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7373984 |
Lining well bore junctions
A well bore liner is carried on a working string into a main bore of a well. A well bore liner is directed from the main bore into an auxiliary bore of the well with a whipstock. The whipstock is...
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7370702 |
Single mill casing window cutting tool and method
An apparatus for cutting a window in a casing pipe in a well, having only a single mill with full gage primary cutting inserts of a very hard, highly wear resistant, material. The primary inserts...
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7353867 |
Whipstock assembly and method of manufacture
The present invention discloses a whipstock assembly (100) for use in forming a lateral borehole from a parent wellbore. The whipstock assembly comprises a body (122) and a deflection member 120)...
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7320366 |
Assembly of downhole equipment in a wellbore
A system and method for assembly of downhole equipment in a subterranean well. In a described embodiment, a method of assembling an apparatus in a subterranean well includes the steps of:...
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7284614 |
Wellbore system for simultaneous drilling and production
A wellbore system for simultaneously drilling a wellbore into an earth formation and producing hydrocarbon fluid from the wellbore, is provided. The system comprises a production tubing extending...
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7284607 |
System and technique for orienting and positioning a lateral string in a multilateral system
A technique that is usable with a subterranean well that has a first string that lines a borehole includes running a second string into the well and engaging a deflecting face of a deflector to...
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7261155 |
Cable side-entry sub with grease injection flow tubes
An integrated side-entry sub with grease injection flow tubes is adapted for making up in a drill string and includes a port to receive a cable, such as a wire line. A first pedestal, mounted...
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7258165 |
Hole opener and drillable casing guide and methods of use
A down-hole tool guide is disclosed for deflecting various down-hole tools having a tendency to hang or bind in uncased bore holes. The down-hole tool guide or ball guide assembly, being adaptive...
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7243738 |
Multi seam coal bed/methane dewatering and depressurizing production system
A process for underbalanced drilling into multiple coal and shale formations, and dewatering the drilled formations, which includes drilling a first borehole through several coal seams to a certain...
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7240738 |
Self-orienting selectable locating collet and method for location within a wellbore
A self orienting selectable locating collet including a collet having at least one deflectable finger; an orientation key positioned at the deflectable finger and being deflectable with the finger;...
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7231979 |
Short radius whipstock system
A short radius exit from a window milled in casing is possible using a whipstock with a sloping surface in excess of 3.5° and a window mill whose diameter is reduced to a percentage generally ...
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7228909 |
One-way valve for a side pocket mandrel of a gas lift system
Embodiments include providing a gas lift system comprising production tubing disposed within a wellbore, the production tubing capable of allowing fluid flow in a first direction from outside the...
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7228897 |
Cement through side pocket mandrel
Well completion cement may be pumped through a side pocket mandrel that includes parallel rows of filler sections to exclude cement from void space within the side pocket tube. The filler sections...
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7225887 |
Method of drilling an ultra-short radius borehole
A method of drilling a borehole into an earth formation using a drill string having an upper part and a lower part which is more flexible than the upper part, the method involving drilling a first...
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7213654 |
Apparatus and methods to complete wellbore junctions
A method and apparatus for completing a wellbore junction, wherein, in one embodiment, a first leg of a screen is fastened within a first tubular with a preformed window. The first tubular houses a...
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7213607 |
Mandrel for a gas lift valve
The present invention relates to a mandrel for a gas lift valve which comprises an elongated body provided with means of connection at its ends. The body is provided with a side pocket (17) and a...
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RE39509 |
Top entry sub arrangement
A top entry sub (ES) includes a tubular member (TM) with a main body section (8) and an enlarged external diameter upper end portion (11). A single passage (15) extends through the main body...
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7104332 |
Method and apparatus for creating a cemented lateral junction system
An apparatus for creating a cemented lateral junction including a sleeve with a premachined opening and a cover disposed at the sleeve. A release material is disposed at the cover. Further...
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7077204 |
Whip retrieval method and apparatus
The retrieval tool includes a cylindrical member having a body, an inner passage, a guide cylinder and an engaging member. The engaging member may slide within the cylindrical member in order to...
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7066270 |
Multilateral reference point sleeve and method of orienting a tool
A multilateral reference point sleeve includes a tubular member configured to be received in a tubing string of a wellbore. The tubular member has an uphole end and a downhole end. The uphole end...
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6968896 |
Orienting whipstock seat, and method for seating a whipstock
The present invention provides an apparatus and methods for seating a whipstock. The apparatus comprises an expandable seat, or nipple, configured to receive a whipstock. The seat is run into a...
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6935431 |
Well reference apparatus and method
The well reference apparatus and method of the present invention includes a reference member preferably permanently installed within the borehole at a preferred depth and orientation in one trip...
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6910538 |
Whipstock collet latch
A method of anchoring a whipstock on the mill or drill body using an anchor extendible to engage an eyelet formed or provided on the whipstock to run in a mill and whipstock in one trip. The anchor...
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6899173 |
Small tubular window system
A through tubing retrievable whipstock and installation method is disclosed. In the preferred embodiment, a plurality of anchor links pivot at one end and have wickers on an opposed rounded end....
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6868909 |
Drillable junction joint and method of use
A drillable junction joint in a wellbore comprises a wellbore casing in which a section of the casing is constructed of easily drillable material. A sleeve having a premachined window therein is...
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6848504 |
Apparatus and method to complete a multilateral junction
An apparatus and method for connecting a lateral well bore to a vertical well bore using a tieback liner while providing full bore access in the vertical well bore casing. The tieback liner is...
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