Matches 201 - 250 out of 396 < 1 2 3 4 5 6 7 8 >


Match Document Document Title
7073979 Method and apparatus for performing sewer maintenance with a thermal sensor  
A method and apparatus for performing maintenance on sewer pipes using a thermal sensor. The method and apparatus may be applied to the reinstatement of lateral openings after a liner has been...
7073587 System for increasing productivity of oil, gas and hydrogeological wells  
A system for increasing the productivity of oil, gas and hydrogeological wells has means for cutting slots only in a near well zone so as to perform a partial unloading of the well and to remove a...
7066261 Perforating system and method  
A system for perforating a well includes a plurality of perforating guns suspended in the well from the wireline or coiled tubing. A downhole electronic command circuit is provided for firing each...
7063155 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...
7059406 Production-enhancing completion methods  
The present invention relates to improved methods for completing well bores along producing zones while controlling formation sands and increasing surface area available for production. Some...
7059411 Process of using a propellant treatment and continuous foam removal of well debris and apparatus therefore  
A damaged formation is stimulated by igniting a propellant adjacent openings in the wellbore in communication with the damaged formation. Substantially immediately thereafter, low density foam is...
7059405 Methods of treating subterranean formations using low-molecular-weight fluids  
The present invention relates to systems and methods useful in subterranean treatment operations. Examples of methods of the present invention include methods for fracturing a portion of a...
7025141 Method of increasing the well rate of exploitation and recharge wells  
The invention includes a method of increasing of the well rate of exploitation and recharge wells, comprising a means of decreasing the stress state in the well area by constructing of slot-like...
7021404 Method and device for deviated coring and/or drilling  
The invention concerns a method and a device for coring and/or drilling through a wall of a bore hole, to deflect transversely from a longitudinal direction of the hole, further comprising...
6997262 Emergency cutting apparatus and method  
A method and apparatus for cutting one or more longitudinal members, external to a downhole tubular conduit, by pulling upward on a cutter body attached to the tubular conduit, where the...
6997260 Method of repairing tubular members on oil and gas wells  
The disclosure concerns a method and apparatus for repairing or structurally reinforcing an oil and gas well tubular member, or an assembly of tubular members. The assembly to be repaired can...
6973970 Apparatus and methods for establishing secondary hydraulics in a downhole tool  
A tool for making a cut inside a downhole tool, including a housing adapted to move in the downhole tool, a plurality of openings in a wall of the housing that provides a passage from inside the...
6966378 Method and apparatus for perforating a well  
The present invention provides for a perforating gun having stackable sections that latch, enabling the gun string to carry both compressive and tensile loads. This allows for the downhole...
6964303 Horizontal directional drilling in wells  
A method and apparatus for horizontally drilling in wells utilizing a shoe assembly at the down hole end of upset tubing. The shoe assembly includes a fixed section and a rotatable section...
6945328 Lockable motor assembly for use in a well bore  
A lockable motor assembly for use in a well bore comprises a PDM motor having a rotor and a stator. A locking member has a splined projection which is received within a splined recess of the rotor...
6929063 Cutting locator tool  
Disclosed herein is a locator system for a cutting device in combination with a production string. Where the production string has at least one detent along its circumference. The invention also...
6926085 Safety system for underwater cutting  
Apparatus for a method of cutting pipes underwater comprising jetting a jacket down over the pipe, blowing mud out from between the pipe and the jacket so the annulus between the pipe and the...
6920945 Method and system for facilitating horizontal drilling  
A method for facilitating horizontal drilling by positioning in a well casing a shoe defining a passageway extending from an upper opening in the shoe through the shoe to a side opening in the...
6915853 Method and device for perforating a portion of casing in a reservoir  
In connection with a method and a tool for preparing a well for the production of hydrocarbons, it is aimed at perforating a casing portion (26) and working surrounding sediment (80) in a...
6892815 Coal bed methane borehole pipe liner perforation system  
A coalbed methane borehole pipe liner perforation system comprises a plastic pipe punch that slips down inside a coalbed methane production borehole lined with a non-perforated plastic pipe. A...
6880646 Laser wellbore completion apparatus and method  
A method and apparatus for providing fluid flow into a wellbore in which an apparatus having at least one laser energy output is lowered into the wellbore and the at least one laser energy output...
6877559 Retrieving a sample of formation fluid in as cased hole  
A method for retrieving a formation fluid sample through a cased borehole utilizing a sampling tool. Sampling tool straddle packers are set about a first set of perforations and annular fluid is...
6874579 Creating an underbalance condition in a wellbore  
An apparatus and method of perforating and surging a section of the wellbore includes running a perforating gun into the well on a string having an isolation valve above the perforating gun,...
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...
6860329 Apparatus for and method of including a packer to facilitate anchoring a first conduit to a second conduit  
Apparatus and methods are disclosed for anchoring a first conduit to a second conduit. The first conduit is typically an expandable conduit whereby at portion of the first conduit is expanded by...
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...
6786283 Methods and associated apparatus for drilling and completing a wellbore junction  
Apparatus and methods are provided which enhance drilling and completion of wellbore intersections. In a described embodiment, a cutting tool diverter is used to drill a branch wellbore extending...
6772839 Method and apparatus for mechanically perforating a well casing or other tubular structure for testing, stimulation or other remedial operations  
An apparatus and method for perforating, testing, squeezing and/or stimulating an oil or gas well, or other tubular structure. The apparatus preferably is suspended from an elongate conduit, such...
6755249 Apparatus and method for perforating a subterranean formation  
Method and apparatus are presented for perforating a subterranean formation so as to establish fluid communication between the formation and a wellbore, the wellbore having casing cemented...
6715567 Apparatus and method for forming a pilot hole in a formation  
The present invention generally provides an apparatus and method for forming a pilot hole in a formation. In one aspect of the present invention, the apparatus may comprise a starter mill...
6702031 Anchoring device removal method and apparatus  
A method and apparatus for severing the mandrel of an anchor device such as a packer to release the packer and remove it from a well. A cutter locator profile above the packer assembly and a...
6695056 System for forming a window and drilling a sidetrack wellbore  
The present invention discloses and claims a system for forming an opening, or window, in a downhole tubular for the subsequent formation of a lateral wellbore. In the system of the present...
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...
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...
6659178 Apparatus and method for sealing well bores and bore holes  
A method and apparatus for sealing well bores is disclosed. The apparatus comprises plates which initially have a width smaller than the diameter of the well bore to be sealed or plugged. The...
6658981 Thru-tubing stackable perforating gun system and method for use  
A stackable thru-tubing perforating gun system for use in perforating in a large diameter cased wellbore below a smaller diameter production tubing string. The system comprises a thru-tubing...
6634427 Drill string section with internal passage  
Drill string sections are provided comprising internal passages that may be used to facilitate the electrical or hydraulic connection of multiple devices, such as sensors, arranged at spaced apart...
6629565 Abandonment and retrieval apparatus and method  
A well abandonment process for cutting and retrieving an offshore well casing, the process comprising: making a trip to the well wherein all of the following steps are performed, the steps...
6588508 Method and apparatus to reduce trapped pressure in a downhole tool  
A tool string for use in a well includes a filter sub (or trapped pressure regulator sub) that is used with other components to reduce trapped pressure. The filter sub filters out debris that may...
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...
6568488 Roller pipe burster  
A pipe bursting system of the invention operates by compaction rather than by reaming. The system includes a conventional directional boring machine, a drill string, and a pipe burster attached to...
6564868 Cutting tool and method for cutting tubular member  
A fluid cutting tool and method for perforating or severing tubular members from inside. The tool is especially suited for use with a rotational drive system, such as a downhole motor, to separate...
6554073 Method and apparatus for removing wellhead assemblies  
A method of cutting a well casing located beneath a subsea wellhead wherein a cutting assembly is made and lowered into an operative position. A mounting device is secured to the wellhead and the...
6547006 Wellbore liner system  
Wellbore apparatus has been invented which, in at least certain aspects, includes a wellbore apparatus having a tubular member with a top end, a bottom end, a hollow portion, and a window...
6523611 Apparatus for completing a subterranean well and method of using same  
In completing a well bore in a underground formation, the well bore being closed off by a closing structure for blocking flow of pressurized fluid through the well bore, a substantially tubular...
6488090 Method and apparatus for accurate milling of windows in well casings  
A method and apparatus for predictable downhole milling of a casing window having predetermined location, orientation, dimension and contour geometry. An elongate substantially rigid milling shaft...
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...
6454007 Method and apparatus for casing exit system using coiled tubing  
A system and method for setting an anchor and/or whipstock attached to a downhole motor having a cutting tool attached to a tubular member, such as coiled tubing. In one aspect, the motor allows...
6443227 Azimuth control of hydraulic vertical fractures in unconsolidated and weakly cemented soils and sediments  
A method and apparatus for initiating an azimuth controlled vertical hydraulic fracture in unconsolidated and weakly cemented soils and sediments using active resistivity to monitor and control...
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...

Matches 201 - 250 out of 396 < 1 2 3 4 5 6 7 8 >