Patent
Thread joint and threaded components for percussive drilling components
Larsson Kenneth
- 27 Nov 2000
14
TL;DR: In this paper, a percussive drill string includes a spigot and a sleeve, with axially inner and outer conical guides facing toward respective axially outer and inner conical guiding surfaces, respectively.
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Abstract: Two components used in a percussive drill string include a spigot and a sleeve, respectively. The spigot includes a male thread connected to a female thread of the sleeve to form a thread joint. The male and female threads are dimensioned such that axially inner and outer end areas of the female thread are in non-engagement with the male thread when the thread joint is in a tightened state. The spigot includes axially inner and outer conical guiding surfaces facing toward respective axially outer and inner conical guiding surfaces, respectively. Each conical guiding surface forms an angle with a centerline of the sleeve, the angle lying in the range 1 to 20 degrees, to prevent the spigot and the sleeve from being welded together by frictional heat during a drilling operation.
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Citations
Patent
Coupling mechanism for cutting tool
Ruy Frota de Souza,Leonid B. Sharivker,Sergei V. Boulakhov,Christoph Gey,Yosi Harush,Bookheimer Alan J,Uzi Levy,Stephen M. George +7 more
- 25 Jul 2013
TL;DR: A rotary cutting tool includes a cutter of generally cylindrical shape disposed about a central longitudinal axis, the cutter has a first end having an active fluted portion and an opposite second end, the second end having a male threaded portion disposed thereabout as mentioned in this paper.
17
Patent
Percussive drill bit for rock drilling and method for the manufacture of such drill bit
Nava Peter
- 12 Nov 2008
TL;DR: In this paper, a drill bit intended for percussive rock drilling is described, consisting of a front head and a tubular skirt, with an internality read for transferring combined impact and rotary motions to the drill bit.
16
Patent
Male portion, drill bit and threaded joint for percussive rock drilling
Carlstroem Bo,Brungs Anders,Christer Lundberg,Lil Ebrand Per-Olof +3 more
- 06 Jun 2003
TL;DR: In this paper, a male portion for percussive rock drilling is provided comprising sections of reduced cross-sectional areas, at least one thread and a threaded joint for each thread.
15
Patent
Drill string with bend resistant coupling
Jansson Tomas Sh
- 09 Sep 2013
TL;DR: In this paper, the male spigot is configured with a large diameter or cross sectional area being at least equal to the cross-sectional area or diameter of the main length section.
8
Patent
Cutter heads with improved coupling
Leonid B. Sharivker,Sergei V. Boulakhov,Christoph Gey,Ruy Frota de Souza Filho +3 more
- 05 May 2014
TL;DR: A modular cutter head has a holder defining a threaded receiver, and the cutter head can be screwed into the threaded receiver as mentioned in this paper, which can comprise an elongated body portion having a cutting end and cutting edge, and an extended coupling portion spaced from the cutting end, with the coupling portion comprising a core and a plurality of generally helically-extending start threads disposed circumferentially about the core.
7
References
Patent
Earth boring apparatus and method with control valve
Curtis E. Leitko,Michael R. Wasson,Douglas Wayne Lee,Gerald Albert Stangl +3 more
- 22 Dec 1987
TL;DR: In this paper, a pneumatically operated earth-boring tool, a flexible conduit or drill pipe connected to the tool and to a source of pneumatic fluid, is described. But the tool has an earth boring member and a reciprocally movable hammer positioned in the tool.
44
Patent
Apparatus for use in drilling
Philip John Wormald,Raymond John Clemmow +1 more
- 19 Dec 1977
TL;DR: A drill element in the form of a drill rod, a sleeve for coupling together two drill rods or a drill bit, is a single start internal or external cylindrical screw thread by which it is intended to be coupled to a further drill element for percussion or rotary/percussion drilling as discussed by the authors.
30
Patent
Thread structure for percussion rock drilling
Ekloef Aake Torsten,Wiredal Harry Artur Ingvar +1 more
- 03 Apr 1986
TL;DR: In this paper, a thread structure for interconnecting two elements in a percussion drill string comprising an interior cylindrical thread and an exterior cylinrical thread was proposed. But the thread structure was not considered in this paper.
27
Patent
Percussion drill bit
Hans Per Olof Lundstrom,Harry Arthur Wiredal +1 more
- 20 Apr 1976
TL;DR: In this paper, a drill bit with a cylindrical internal surface and an internal thread at a distance remote from the bottom of the hole is described, and a cooperating drill rod has a forwardly tapering portion with a conical exterior face complementary to the conical interior surface of the drill bit and an external thread on its forepart.
21
Patent
Thread coupling for drill string members
Larsson Kenneth Lars
- 07 Jul 1989
TL;DR: In this article, a thread coupling includes at least one male thread and one female tread, arranged upon a spigot, which constitutes an integral part of one drill string element.
14
Related Papers (1)
Philip John Wormald,Raymond John Clemmow +1 more
- 19 Dec 1977