| Patent Number |
Title Of Patent |
Date Issued |
| 6860343 |
Drill rod holder |
March 1, 2005 |
| Drill rod holder (10) for clamping a pair of jaws against a drill rod (40), by a piston-cylinder arrangement (22). A first of the jaws is fixed and a second jaw (36) is movable by the piston-cylinder arrangement. A medium under pressure is introduced into the cylinder to urge the piston |
| 6820703 |
Locking device for a wire line core drilling system and a method for core drilling |
November 23, 2004 |
| The present invention relates to a locking device (4) for a wire line core drilling system comprising an inner tube (2) by means of which core samples are collected, and an outer tube (1) connected to a drill bit, which locking device is applied in the rear end of the inner tube. The |
| 6708784 |
Core barrel valve assembly |
March 23, 2004 |
| The present invention relates to a method for a valve, which valve comprises a movable valve body (6) having a first side (9) facing a means for supplying pressurized fluid and influenced in the supply direction by a force from said fluid, and a second side (11) influenced in opposite |
| 6446541 |
Method and device for jointing rods and piston pump including the device |
September 10, 2002 |
| A device is provided for splicing our joining together two rod-like elements which each have at least one end that shall be joined to a respective end of the other rod-like element, wherein the ends of the two rod-like elements are caused to face one another and are placed adjacent e |
| 6148934 |
Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussio |
November 21, 2000 |
| A coupling piece for use in drilling has a first connection (2) for connecting to an upper rotary percussion device (3), and a second connection (4) for connecting to a drill tube string (5) provided with an annular drill bit (23). The coupling piece has a first chamber (11) and a se |
| 6016878 |
Method and device for drilling |
January 25, 2000 |
| Methods and devices are provided for drilling with impregnated diamond drill bits in which the drill bit (30) automatically continues cutting. The speed of a drilling device (3) along a feed device (2) is determined, and the measured value is used for continuously controlling the feed |
| 5996710 |
Drilling device |
December 7, 1999 |
| A drilling device has a frame (1) with a feed device (2) for carrying a drilling device (3) movable to-and-fro for rotating a drill string (4). The drilling device includes a sensor (6) for sensing an end (7) of a drill string element (8) in the drill string (4), and a register for the |
| 5813484 |
Casing tube with casing shoe |
September 29, 1998 |
| A casing tube formed from plastic and a casing shoe formed from metal are provided for drilling in layers of earth or rock. The casing shoe is locked to the casing tube by threads, grooves or flanges provided on a reduced diameter portion of the casing shoe. A tube-formed extension is |
