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WO/1998/057033A1 |
A method of controlling rock drilling performed by a rock drill provided with a pressure-driven hammer and a rotation motor. In the method, the speed of rotation of the drill rod is defined on the basis of the value of the control signal...
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WO/1998/046856A1 |
A system (1) for drilling a borehole in an earth formation is disclosed, the system (1) comprising a first sub-system (I) including a drill string (3) extending into the borehole, and a second sub-system (II) including a drive system for...
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WO/1998/042481A1 |
An arrangement in a rock drill comprising a shank (3) and a percussion piston (2) and lifting means for moving the shank (3) towards the percussion piston (2), and a method of controlling rock drilling. The arrangement comprises a liftin...
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WO/1998/034007A1 |
A tool for use in forming a lateral, which tool comprises a formation drill (525) which is provided with a protective layer (527), and a mill (520) for forming a window in casing, the arrangement being such that, in use, said protective ...
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WO/1998/023848A1 |
A method and an arrangement for controlling the feed of a rock drill. In the method, the pressure in a pressure conduit (7a) of a a pressure-fluid-operated feed motor (6) is measured, and when the pressure value measured is below the pre...
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WO/1998/023847A1 |
An arrangement in a rock drilling apparatus comprising supports (5) directed toward the rear part of the feed, the supports being moveable by means of support cylinders (6) to support the feed during the drilling operation. The arrangeme...
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WO/1998/022693A1 |
The invention concerns a drilling device comprising a drilling unit (1) the tool of which(2) is driven in rotation from a hydraulic motor (15) associated with an injection timing gear (8) for generating a pressure force of the drilling u...
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WO/1998/022689A2 |
A whipstock (10) has a flowchannel (41) therethrough to facilitate the rapid lowering of the whipstock through liquid in an oil well. A whipstock (10) has a guide surface and a sacrificial element (20) spaced from the guide surface. In u...
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WO/1998/017894A2 |
The present invention provides a drilling system (10) that utilizes an integrated bottom hole assembly (90). The bottom hole assembly contains sensors (59, S1-S6, 64, 76, 74) for determining the health of the bottom hole assembly, boreho...
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WO/1998/016720A1 |
The present invention is an improved apparatus for controlling the weight on the drill bit during operation. In this invention, an inner mandrel (1) has a telescoping movement in response to added drill string length at the surface. As t...
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WO/1998/016712A1 |
The present invention provides a drilling system (10) for drilling of boreholes. The drilling system contains a drill string (20) having a drill bit (50) driven by a mud motor (55). Sensors placed at selected locations in the drill strin...
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WO/1998/012410A1 |
The coupling piece comprises a first connection (2) for connection of an upper rotary percussion device (3) and a second connection (4) for connection of a drill tube string (5) provided with an annular drill bit (23). The coupling piece...
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WO/1998/012418A2 |
An autonomous downhole oilfield tool having its own mobility and decision making capability so that it may be deployed in a downhole environment to monitor and control said environment by modifying operations of other devices and maintai...
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WO/1998/002634A1 |
A downhole tool and apparatus is described for logging and/or remedial operations in a wellbore in a hydrocarbon reservoir. The tool comprises an autonomous unit (1) for measuring downhole conditions, preferably flow conditions. The auto...
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WO/1997/049889A1 |
A drill bit (6) is equipped with one or more fluid jets (7) that are activated during a portion of the rotational movement of the drill bit (6). A processor (41) located with other down-hole sensors (33-38), is programmed with parameters...
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WO/1997/049895A1 |
A method and an arrangement for controlling the feeding of a rock drilling machine so that the feeding of a drill rod of the rock drilling machine is controlled on the basis of the rotation resistance of the drill rod rotated by a hydrau...
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WO/1997/049896A1 |
A method and an arrangement for controlling rock drilling on the basis of a pressure acting in a pressure conduit of a rotation motor of a drill rod. In the method, the pressure acting in the pressure fluid conduit of the rotation motor ...
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WO/1997/047858A1 |
A method and an arrangement for controlling the operation of a rock drilling unit driven by a diesel-hydraulic power source. In the invention, the hydraulic fluid flow supplied by a diesel engine (3) driven pressure controlled volume flo...
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WO/1997/046793A1 |
A wellhead pump control system (20) for artificial lift systems controls a motor of a wellhead pump that is removing fluid from within a well. The system (20) includes a downhole well tool (22) having sensing devices (32) which measure p...
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WO/1997/042395A1 |
This invention provides a fluid-handling system for use in underbalanced drilling operations. The system includes a first vessel which acts as a four phase separator. The first vessel includes a first stage for separating solids. Oil and...
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WO/1997/037102A2 |
Several downhole flow control devices are disclosed which are meterable and are also capable of shutting off a particular zone in a well. Several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of rel...
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WO/1997/036090A1 |
A method of regulating drilling conditions applied to a given well bit comprises assaying the compressive strength of the formation in an interval to be drilled by said bit. Wear of critical bit structure of the same size and design as i...
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WO/1997/036084A1 |
A method of assaying work of a bit (10) of a given size and design comprises the steps of drilling a hole with the bit (10) from an initial point (I) to a terminal point (T) and recording the distance between the initial and terminal poi...
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WO/1997/030269A1 |
Several motor (28) driven embodiments are discussed which provide linear motion to a downhole flow control device (46). The embodiments employ ball screw (110, 112, 114) assemblies or lead screw (24) assemblies. A device for rotational a...
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WO/1997/023813A1 |
Apparatus for controlling a diamond drill feed cylinder (14) which includes a linear position sensor (51) coupled to the feed cylinder for generating a position signal, a positioning module (10) for generating a feed control signal in de...
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WO/1997/015749A2 |
The present invention provides a closed-loop drilling system for drilling oilfield boreholes. The system includes a drilling assembly with a drill bit, a plurality of sensors for providing signals relating to parameters relating to the d...
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WO/1997/008459A1 |
An improved electrical submersible pump is disclosed in which a processor (37) downhole is utilized to monitor one or more subsurface conditions, to record data, and to alter at least one operating condition of the electrical submersible...
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WO/1997/008428A1 |
The invention relates to drilling with impregnated diamond drill bits where one automatically keeps the drill bit (30) cutting. The speed of the drilling device (3) along the feed device (2) is determined and the measured value is used f...
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WO/1997/005334A1 |
There is disclosed a method of continuous flight auger piling and a continuous flight auger rig (1), wherein an auger (2) is applied to the ground so as to undergo a first, penetration phase and a second, withdrawal phase, and wherein th...
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WO/1997/001693A1 |
A hydraulic thruster (1) for generating a thrust force to a drill bit located at the lower end of a drill string is provided. The thruster comprises a first member (3) connectable to an upper part of the drill string and a second member ...
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WO/1996/038653A2 |
A device for controlling weight on bit of a drilling assembly for drilling a borehole in an earth formation, is provided. The device comprises a fluid passage (24, 26) for the drilling fluid flowing through the drilling assembly, and con...
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WO/1996/036788A1 |
A stabilizer body is rotatably carried by the stabilizer sub (3), wherein the stabilizer body remains substantially stationary relative to the borehole as the drillstring rotates. At least one stabilizer blade (11) is carried by the stab...
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WO/1996/030623A1 |
A milling tool (110) is provided with a valve member (122) which can be displaced to inhibit the flow of drilling fluid through the milling tool (110). A whipstock (150) is provided with a stop (155) which the valve member (122) engages ...
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WO/1996/030627A1 |
Drilling device comprising a frame (1) with a feed device (2) which carries a drilling device (3) movable to-and-fro for rotation of a drill string (4). The drilling device comprises means (6) for sensing an end (7) of a drill string ele...
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WO/1996/026351A1 |
A downhole tool (1) for providing a thrust force to an elongate body (5) extending in a borehole formed in an earth formation is provided. The tool (1) comprises at least one rotable body (15) provided with a plurality of rollers (23), e...
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WO/1996/024749A1 |
A system adapted for controlling and/or monitoring a plurality of production wells from a remote location is provided. This system is capable of controlling and/or monitoring: (1) a plurality of zones in a single production well; (2) a p...
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WO/1996/023127A1 |
A method for recording or logging measurements that are substantially comparable to the acoustic impedance of formations crossed through by a borehole. The measurements are obtained from an acceleration sensor (11) placed in the drill st...
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WO/1996/021871A1 |
This invention is directed toward apparatus and methods for obtaining acoustic measurements or "logs" of earth formations penetrated by a borehole. More particularly, the invention is directed toward obtaining the acoustic measurements w...
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WO/1996/018118A1 |
The present invention is concerned with a system for the real time location of deep boreholes while drilling. The system includes a plurality of sensors sensitive to seismic vibrations disposed in an area where a borehole is to be drille...
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WO/1996/005410A1 |
A method to adjust a drilling apparatus drilling a tunnel into the ground or drilling open a tube line in the ground, which apparatus comprises a rotating drill bit (1), bit rotating equipment (6), a protective tube line (3) to be instal...
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WO/1995/028549A1 |
Arrangement in a hydraulically operated rock drilling equipment comprising a feed motor (3), a percussion device (2), and a hydraulic pump (1) for feeding hydraulic fluid to the feed motor (3) and the percussion device (2). The arrangeme...
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WO/1995/023275A1 |
The invention relates to an arrangement for control means in rock drilling equipment, comprising an electronic control unit (1) for controlling operating means (6). The control unit comprises an electronic basic set-value memory (3) stor...
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WO/1995/021990A1 |
A drilling torque and drag monitoring method for a drillstring (16) in a well bore (12) including the steps of measuring hook load and axial displacement of the drillstring (16), measuring surface torque and angular rotation of the drill...
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WO/1995/012040A1 |
Drilling apparatus which comprises a frame operating as an underlay having in the drilling direction mounted guide tracks (4), a rotating and pushing unit which is moved on said guide tracks in the drilling direction and in which unit th...
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WO/1995/009294A1 |
A rotary blasthole drilling apparatus comprises a rotary blasthole drill (2, 4, 6) and a drill automation control system. The apparatus includes a pull-down motor (42) and a drill motor (44). The pull-down motor (42) is driven by a pump ...
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WO/1995/009296A1 |
An apparatus and method for use in determining drilling conditions in a borehole (12) in the earth having a drill string (13), a drill bit (20) connected to an end of the drill string (13), sensors (32) positioned in a cross section of t...
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WO/1995/008693A1 |
An arrangement for controlling the feed motion of the feed beam (1) of a rock drill, said arrangement comprising sensing elements for detecting the position of the front and the rear end of the rock drill (2) and for controlling the feed...
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WO/1995/003472A1 |
Electrodes (2) are provided in a drill bit (1), or alternatively, in a coring bit, to measure variations in formation resistivity (R) surrounding an earth borehole. Three orthogonal accelerometers (4A, 4B, 4C) are also provided in the dr...
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WO/1994/027028A1 |
An earth dumping control device for a small diameter pipe propelling machine for laying a small diameter pipe under the ground wherein a small diameter pipe (2) mounted with a leading pipe (1) at the leading end thereof is propelled into...
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WO/1994/025722A1 |
A drill rig (10) which is equipped with one or more safety mechanisms (12) designed to prevent injuries to rig operators. In a first embodiment, the safety mechanism (12) includes a barrier (28) which is shiftably mounted to the rig (10)...
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