Matches 251 - 300 out of 396 < 1 2 3 4 5 6 7 8 >


Match Document Document Title
6408944 Apparatus and method to shut down a pipeline  
For an apparatus and method to shut down pipelines, an apparatus frame is supported by the pipe to be shut down, and includes a pointed drill and a drill cylinder to drill a hole, essentially...
6374916 Method and apparatus for stiffening an output shaft on a cutting tool assembly  
The present invention generally provides a system and method for stiffening a cutting tool assembly used in cutting laterally relative to a wellbore axis to reduce stresses and cyclical bending of...
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...
6330919 Method of removing wellhead assemblies and cutting assembly for use therein  
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...
6315044 Pre-milled window for drill casing  
A pre-milled window casing on a casing string for allowing a cutting tool inserted into said will to contact the earth through said hole provided in said casing. Portions of a casing section along...
6286599 Method and apparatus for lateral casing window cutting using hydrajetting  
A method and apparatus using hydrajetting of fluid to cut a lateral casing window for drilling a side track. The apparatus comprises a J-sub having a J-slot therein which guides movement of a...
6276452 Apparatus for removal of milling debris  
An apparatus and method for drawing small milling debris into a combination milling and debris retrieval tool, during the performance of the milling operation. A milling tool has a fluid intake...
6202752 Wellbore milling methods  
New wellbore milling systems and methods of their use have been developed, the milling system in one aspect including at least one mill, at least one stabilizing member connected to and above the...
6186233 Down hole assembly and method for forming a down hole window and at least one keyway in communication with the down hole window for use in multilateral wells  
Down hole assembly and method for forming a longitudinal window and a key-way in communication with the longitudinal window used in drilling multi-lateral well bores and for entry and reentry...
6170576 Mills for wellbore operations  
A wellbore mill has been invented that, in certain aspects, has a body having a top and a bottom and, optionally, a fluid flow channel extending therethrough from top to bottom with, optionally,...
6167968 Method and apparatus for radially drilling through well casing and formation  
An apparatus for drilling holes in the steel casing of an a oil or gas well, and drilling into the surrounding earth, includes a number of components controlled by hydraulic fluid. A first...
6155349 Flexible wellbore mill  
A wellbore mill has been invented having a flexible main body, and at least one milling apparatus secured on the flexible main body. A wellbore mill has been invented having a main body with a top...
6125929 Casing cutter blade support sleeve  
A blade support assembly for use with a casing cutter to cut through casing or pipe downhole in a well. A tubular body fits over the casing cutter, with slots aligned with the pivoting cutter...
6116344 Apparatus for completing a subterranean well and associated methods of using same  
Apparatus and associated methods of using provide convenient and economical forming of an opening through a tubular structure in a subterranean well. In a preferred embodiment, a milling guide has...
6112812 Wellbore milling method  
A wellbore mill has been invented which has milling apparatus with a starting mill and a finishing mill, the starting mill having a central channel extending longitudinally therethrough, the...
6109347 One-trip, thru-tubing, window-milling system  
A one-trip, window-milling system method and apparatus is disclosed. The system is particularly useful in thru-tubing applications where the mills are run on coiled tubing in conjunction with a...
6105675 Downhole window milling apparatus and method for using the same  
A window milling device which parameters can be set, prior to running inside a casing, and once positioned at a proper location can assure accurate and constant milling parameters, independently...
6092594 Device for making or regenerating a water well  
A device for making or regenerating a water well, said well comprising a casing installed inside a borehole in the ground. The device comprises a operating head with angularly equispaced radial...
6089319 Whipstock  
A wellbore tool locating system has been invented which includes a friction engager for engaging an interior of a wellbore tubular, an outer sleeve connected to the friction engager and having a...
6070665 Wellbore milling  
Wellbore liner apparatus has been invented which, in one aspect, includes at least one tubular member for lining at least part of a lateral wellbore extending from a primary wellbore in the earth,...
6056056 Whipstock mill  
Wellbore apparatus has been invented that includes a whipstock with a top and a bottom, the whipstock disposed in a wellbore extending down from an earth surface into the earth, the wellbore...
6047773 Apparatus and methods for stimulating a subterranean well  
A method of stimulating a subterranean well permits each desired location within a portion of a well to be isolated from other portions of the well during stimulation operations therein, but does...
6035935 Method for establishing connectivity between lateral and parent wellbores  
A method of interconnecting wellbores is provided which is convenient and economical in its performance. In a described embodiment, milling is not required for forming an opening through a...
6032740 Hook mill systems  
A wellbore mill system having a first mill with a main body with a top end and a bottom end, milling structure on the main body, and a hook portion projecting from the bottom end of the main body...
6029745 Casing cutting and retrieving system  
A system has been invented for cutting wellbore casing and retrieving casing and a wellbore device connected thereto, the system, in one aspect, including engaging apparatus for releasably holding...
6024169 Method for window formation in wellbore tubulars  
New systems and methods have been invented for explosively forming openings, ledges, windows, holes, and lateral bores through tubulars such as casing, which openings may, in cerain aspects,...
6012526 Method for sealing the junctions in multilateral wells  
Junctions in multilateral well structures are sealed by employing a variety of degrees of premachined components and a variety of sealing embodiments, including casing segments having premachined...
5988272 Apparatus and method for milling a well casing  
Apparatus for milling the casing of an oil or gas well comprises a downhole assembly which is run into the well on a rotatable drill string. The assembly comprises a motor (6) the body of which is...
5979943 Shearable completion riser joint  
The present invention refers to a completion riser joint (1) shearing by the shear ram of the blow-out preventer (BOP) (2), to be coupled, at its lower part, to the column hoist running tool and,...
5979571 Combination milling tool and drill bit  
A combination metal milling and earth drilling tool, for use in performing a single trip kickoff from a casing in a well bore. The combination milling and drilling tool has a first, relatively...
5947201 One-trip window-milling method  
A one-trip whipstock milling system is disclosed which allows for setting of a packer or plug which is run in as part of the bottomhole assembly, in conjunction with orientation instrumentation, a...
5931442 Submersible work vessel for installing a blow out preventer  
A submersible work vessel and a method of using the same are disclosed. The vessel contains an internal work space. It also contains a set of openable jaws that are designed to engage an...
5924489 Method of severing a downhole pipe in a well borehole  
A method of severing a downhole pipe for forming a region in the well borehole devoid of downhole pipe for enhancing the performance of a perforating gun comprising the steps of: severing, at an...
5862862 Apparatus for completing a subterranean well and associated methods of using same  
Apparatus and associated methods of using provide access to a portion of a parent wellbore that has been separated from the remainder of the parent wellbore by a lateral wellbore liner. In a...
5806596 One-trip whipstock setting and squeezing method  
A one-trip assembly that includes the mill or mills for milling a window, the whipstock, the whipstock anchor or packer, and a valving assembly is disclosed which permits running in all the...
5806595 Wellbore milling system and method  
A method for milling an opening, slot, hole, or window in a tubular of a tubular string in a wellbore, has been invented which includes installing a mill system in the tubular at a desired milling...
5803176 Sidetracking operations  
A method for milling an opening in a tubular in a wellbore, the method comprising installing a mill guide in the tubular at a desired milling location, inserting milling apparatus through the...
5791417 Tubular window formation  
New systems and methods have been invented for explosively forming openings, ledges, windows, holes, and lateral bores through tubulars such as casing, which openings may, in cerain aspects,...
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...
5778980 Multicut casing window mill and method for forming a casing window  
A single trip tool and method for cutting a subsurface window through a well casing and installing an anchoring and orienting sleeve in the casing adjacent the window for subsequent downhole well...
5769166 Wellbore window milling method  
A wellbore milling system has been invented which includes, in one aspect, a lower window mill, and two watermelon mills connected above the window mill. In one aspect the topmost of the two...
5727629 Wellbore milling guide and method  
A method for milling an opening in a tubular in a wellbore, the method comprising installing a mill guide in the tubular at a desired milling location, inserting milling apparatus through the...
5720349 Starting mill and operations  
A new mill has been invented which has a body, a fluid flow bore therethrough, and apparatus therein for selectively controlling the flow of fluid through the bore. In one aspect the mill is a...
5701958 Apparatus for drilling perforations in well casings  
Apparatus for drilling perforations in a well casing to reinitiate water flow into the casing to restore operation of a well. The apparatus includes a pneumatic drill mounted within a housing...
5692565 Apparatus and method for sampling an earth formation through a cased borehole  
An apparatus is disclosed for perforating, testing and resealing casing in an earth formation borehole. The apparatus is moveable through the casing. The apparatus can also be mounted on a...
5673760 Perforating gun including a unique high shot density packing arrangement  
A perforating gun includes a multiplicity of shaped charges, the multiplicity of shaped charges including a plurality of planes of charges, each plane of charges including a plurality (N) of...
5664627 Method and apparatus for protecting a steel riser from chemical cutters  
A sleeve member constructed of material, preferably aluminum metal, nonreactive with chemicals from a chemical cutter, including a ringed collar around its upper end, the ring collar secured to...
5647436 Whipstock and starter mill  
A mill kick out apparatus comprises a whipstock and a starter mill. The whipstock has a lower end pivotally connected to a supporting assembly, an upper end, an outer side for disposition adjacent...
5636692 Casing window formation  
A new casing opening formation apparatus has been invented which includes an explosive charge and an apparatus for positioning the explosive charge in a casing in a cased wellbore at a desired...
5620051 Whipstock  
A downhole wellbore tool has been developed which has a lower movable valve apparatus which, when it contacts a member in a wellbore or in a tubular in a wellbore, is moved to close off fluid flow...

Matches 251 - 300 out of 396 < 1 2 3 4 5 6 7 8 >