Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 7 - Special methods or apparatus for drilling
Patents for E21B 7 - Special methods or apparatus for drilling (22,064)
11/1995
11/21/1995US5467819 Orientable retrievable whipstock and method of use
11/16/1995WO1995023273A3 Whipstock apparatus and methods of use
11/16/1995DE4438934C1 Location device for ram boring appts.
11/14/1995US5465799 System and method for precision downhole tool-face setting and survey measurement correction
11/14/1995US5465797 Pneumatic ground piercing tool with detachable head
11/14/1995CA2149173A1 Permanent whipstock
11/09/1995WO1995030065A1 Device for driving a tunnel or drain pipe
11/09/1995DE4418125C1 Method of decontaminating ground
11/09/1995DE4415399A1 Anordnung zum Vortrieb eines Tunnel- oder Abwasserrohrs Arrangement for driving a tunnel or sewer pipe
11/02/1995WO1995029321A1 Casing tube with casing shoe
11/02/1995WO1995029320A1 Moling apparatus
11/02/1995WO1995029319A1 System and method for precision downhole tool-face setting and survey measurement correction
11/02/1995EP0679797A2 Method and apparatus for erosive stimulation of open hole formations
11/02/1995EP0679216A1 Method for determining borehole direction.
10/1995
10/31/1995US5462129 Method and apparatus for erosive stimulation of open hole formations
10/31/1995US5462120 Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes
10/26/1995WO1995028546A1 Milling apparatus and method for well casing
10/26/1995WO1995028545A1 Drill bit for geological exploration
10/25/1995EP0678654A2 Replaceable cutting means segment for use in a ground drill
10/25/1995EP0678653A2 Tool for use in system for in situ replacement of cutting means for a ground drill
10/25/1995EP0678652A2 Insert for use in retaining a cutting means in a ground drill
10/25/1995EP0678651A2 Drive sub for connection to a ground drill
10/25/1995EP0678628A1 Multi-shaft excavating device
10/25/1995EP0678135A1 Installation for transmitting drive power to piling, cut-off or similar devices usable under water.
10/25/1995EP0678134A1 Submersible driving unit for underwater ramming machinery and tools.
10/25/1995CN1110749A Box type foundation pile drilling machine
10/19/1995DE4413395A1 Steerably cutter for making underground duct for e g pipeline
10/18/1995EP0677640A1 Improvements in or relating to steerable rotary drilling systems
10/18/1995EP0677135A1 Method and apparatus for setting a whipstock
10/17/1995US5458209 Device, system and method for drilling and completing a lateral well
10/17/1995US5458208 Directional drilling using a rotating slide sub
10/17/1995US5458204 Vibration pile driver for ramming and/or pulling of ram material
10/17/1995US5458199 Assembly and process for drilling and completing multiple wells
10/10/1995US5456552 Method and apparatus for installing pipe in horizontal borehole
10/10/1995US5456326 Apparatus and method for installing open-ended tubular members axially into the earth
10/10/1995US5456325 Method and apparatus for driving a probe into the earth
10/10/1995US5456317 Buoyancy assisted running of perforated tubulars
10/10/1995US5456141 Method and system of trajectory prediction and control using PDC bits
10/10/1995US5456106 Down hole assembly
10/10/1995CA2013786C Flushing means for drilling tools
10/05/1995WO1995026454A2 Curved drilling apparatus
10/04/1995EP0674744A1 Assembly and process for drilling and completing multiple wells.
10/03/1995US5454430 Lateral wellbore completion apparatus
09/1995
09/28/1995WO1995025875A1 Milling tool
09/28/1995WO1995025872A1 Stabilisation devices for drill motors
09/27/1995EP0674093A2 Directional boring head with deflection shoe
09/27/1995CN2208614Y Vehicle carried geological prospecting equipment
09/26/1995US5452772 Apparatus for steering the foremost part of the drillpipe
09/26/1995US5452759 Whipstock system
09/20/1995EP0672818A1 Modular measurement while drilling sensor assembly
09/19/1995US5450914 Fluid powered stepping motor for rotating a downhole assembly relative to a supporting pipe string
09/19/1995US5450912 Maintenance and extraction of poles
09/19/1995CA2015102C Plasma blasting method
09/13/1995EP0670950A1 Drilling apparatus.
09/13/1995CN2207439Y Vehicle-carried driller
09/13/1995CN2207438Y Sneak rocker arm rolling-scrubbing square pile driller
09/12/1995US5449248 Sealing device for expansion joints of concrete dams and method for installing same
09/12/1995US5449046 Earth boring tool with continuous rotation impulsed steering
09/12/1995US5449045 To be driven into the ground to form a borehole
09/07/1995DE4409673C1 Tubing for filter tube for extraction of ground water samples
09/07/1995DE19507581A1 Steering head for directional drilling
09/06/1995EP0670008A1 Method and apparatus for setting a whipstock
09/05/1995US5448227 Method of and apparatus for making near-bit measurements while drilling
08/1995
08/31/1995WO1995023276A1 Arrangement and method for controlling boom actuating cylinders in rock drilling equipment
08/31/1995WO1995023273A2 Whipstock apparatus and methods of use
08/31/1995CA2284524A1 Whipstock apparatus and methods of use
08/31/1995CA2284488A1 Whipstock apparatus and methods of use
08/31/1995CA2183970A1 Arrangement and method for controlling boom actuating cylinders in rock drilling equipment
08/30/1995EP0668977A1 Soil displacement hammer for replacing underground pipes
08/30/1995CN1107643A Process and tool for laying underground collector mains for liquids and gases
08/29/1995US5445230 Downhole drilling subassembly and method for same
08/29/1995US5445222 Whipstock and staged sidetrack mill
08/29/1995CA2030163C Adjustable bent sub
08/24/1995WO1995023274A1 Retrievable whipstock arrangement and method
08/24/1995WO1995022711A1 Trenchless pipeline installation method with pilot hole corrective alignment
08/24/1995WO1995022677A1 An apparatus for drilling open a tunnel and drilling method
08/24/1995WO1995022427A1 Device for the gas-jet cutting of materials
08/24/1995DE4405116A1 Civil engineering process to create excavations in waste dumps, tips, etc
08/24/1995CA2183870A1 An apparatus for drilling open a tunnel and drilling method
08/22/1995US5443129 Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole
08/22/1995US5443128 Device for remote actuating equipment comprising delay means
08/17/1995WO1995021985A1 Drilling support unit to be mounted on an excavator boom
08/17/1995WO1995021984A1 Process for removing the core of earth from a pipe laid without excavation and scraper for implementing said process
08/17/1995DE4404712A1 Verfahren zum Ausbau eines Erdkerns aus einem grabenlos verlegten Rohr und Molch zur Durchführung des Verfahrens A method for removing a soil core from a trenchless laid pipe and pigging for performing the method
08/17/1995CA2183358A1 Drilling support unit to be mounted on an excavator boom
08/16/1995CN2205439Y Hydraulic impacting device
08/16/1995CN2205438Y Device for pipe curve drilling passing through stratum
08/16/1995CN1029518C Super-fluid-state concrete and method for forming pile filled by the concrete and drill for pile-formining method thereof
08/15/1995US5441119 Directional drilling tool
08/10/1995WO1995021347A1 Pipe splitting and spreading system
08/10/1995CA2179514A1 Pipe splitting and spreading system
08/09/1995EP0517731B1 Apparatus and method for building a foundation for uprights or for making passages therethrough
08/09/1995CN2204849Y Profile tunnel drill
08/08/1995US5439320 Pipe splitting and spreading system
08/08/1995US5439066 Method and system for downhole redirection of a borehole
08/08/1995US5439064 System for controlled drilling of boreholes along planned profile
08/03/1995DE4403040A1 Widening drill bit for widening pilot hole in loose stone
08/01/1995US5437340 Millout whipstock apparatus and method
08/01/1995US5437308 Device for remotely actuating equipment comprising a bean-needle system
07/1995
07/27/1995WO1995020126A1 Device for use in replacing sewage piping
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