CA1251805A

CA1251805A - Mobile service rig

Info

Publication number: CA1251805A
Application number: CA000494465A
Authority: CA
Inventors: Charles Gryba
Original assignee: MONETA PORCUPINE MINES Inc
Current assignee: MONETA PORCUPINE MINES Inc
Priority date: 1985-11-01
Filing date: 1985-11-01
Publication date: 1989-03-28
Also published as: AU6464186A; AU591721B2

Abstract

ABSTRACT OF THE DISCLOSURE
A bicycle comprising a plurality of lugged members, each having a plurality of substantially cylindrical stub inserts extending outwardly therefrom, and a plurality of hollow, substantially cylindrical tubes which receive the stub inserts in their ends and join the lugged members together to form the frame. Each of the stub inserts includes an inner portion having a first outside diameter and an outer, pilot portion having a second, smaller outside diameter. The tubes are sized such that their inside diameters form a slip-fit with the pilot portions and a press fit with the inner portions of the inserts. An appropriate metal adhesive is applied to the pilot portions to form a bond between the pilot portions and the tubes so that the frame components are held together by the adhesive bond as well as the press fit engagement between the inserts and tubes. The press fit engagement is such that the frame is capable of storage and handling prior to the setting up of the adhesive bond.

Description

~2~ )S

MOBILE SERVICE RIG

This invention rela-tes to a mobile service rig to walX up and down a pipe system and more particularly Eor providing access to a bored raise.
Acsess within a raise is normally provided by a series of ladders, or a cab riding on a ~inden-AlimaX rail mounted on the hanging wall o~ the raise, or a hoist and cable assembly.
Ladders are still in use for short raises or in emergency manways but are impractical ~or long production raises where men and material have a long distance to travel, or where a ladder would be in the way of men and equipmsnt.
The Linden-Alimak raisa climber is a practical and fast means o~ access to a work area in a raise but is prone to mechanical breakdowns. Besides, the Linden-Alimak rail, held into place by rockbolts, imposes some weight limitations.
It is therefore the object of the present invention to provide a new means of travelling up and down a bored raise, more particularly a bored raise o~ the type disclosed and claimed in Canadian application no. ~ 9 ~.
~: filed ~6~e~ IJ ~q~ wherein the drill string o~ a raise boring machine is used for moving a mining assembly up and down the bored raise.

~5~

The mobile service rig, in accordance with the present invention, comprises a work plat~orm adapted to be slideably mounted on a pipe system, a pair of cylinders secured to the work platform and pipe grippers attached to the piston of each cyliner and adapted to enga~e the pipe system, whereby by alternately operating the pipe grippers and cylinders the work platfcrm can be moved up or down along the pipe system.
When used in a bored raise, rollers may be installed on the work platform and adapted to engage the bored raise wall and the pipe system to ease movement o~
the work platform in inclined raises, Gripper pads may also be mounted on the work platform to ~asten the plat~orm against the bored raise wall while working on the plat~orm.
The invention will now be disclosed, by way of example, with ref~rence to a preferred embodim~nt illustrated in the accompanying drawing.
Referring to the drawing, there is shown a mobile service rig designated generally by reference numeral 10 which is mounted on the drill string 12 of a raise boring machine and is adapted to travel up and down a bored raise 14. The mobile service rig comprises a platform 16 suspended underneath a lower ring 18 by three, columns 20 spaced at 120Co A cylinder 22 is secured to the work platform and has its piston 24 connected to pipe grippers ~s~

26 mounted on the drill string. The pipe grippers may be of the type used in the petroleum industry for holding drill pipes on an oil drill rig, _uch as Model 80 Slips, made by TRW ~ission. A second cylinder 28 is secured to lower ring 18 and has its piston 30 connected to an upper ring 32 which is itsel~ connected to pip2 grippers 34 also mounted on the drill string. By altsrnately operating the cylinders and pipe grippers the mobile service rig may be made to travel up and down the drill string. The operation of the two cylinders and yrippers may be coordinated by hydraulic or el0ctronic circuitry well known in the art to pP~mit continuous motion, While one set o~ grippers and cylinders is fastened to the drill string and moving the vehicle, the second set o~ grippers and cylinders is moving to a new pO9 ikion along the drill string.
In an inclined raise, a cer~ain amount o~ sag in the drill string 12 must be accounted ~or. To counter this, the work platform 16 and the rings 18 and 32 are equipped with rollers 36 to ease the passage along the bored raise wall 14 and along the drill string 12.
There are also a number o~ ~ail sa~e spring loaded and hydraulically released gripper pads 38 mounted on the work plat~orm 16 and on the upper ring 32. These are used to ~asten the platform against the bored raise wall while the plat~orm is stationary or for l:he purpose o~ drilling, loading of explosives, or any other operations which may S~ 5 be performed on the platform in addition to providing access to a mining assembly mounted on the end of the drill string disclosed in the above mentioned patent application. The gripper pads may also be used as backup to the pipe gripp~.rs when travelling up and down the ralse .
A power unit 40 is mounted on the lower ring 18. Power may be supplied by a trailing cable (not shown~.
In case of emergency, a second power source may also be made available via batteries or a diesel engine.
The work platform may be equipped with a leveling mechanism for working in inclined raise ~
The advantages of the mobile service rig in accordance with the prasent invention are as ~ollows-1) There is no practical weight limitation.

2) The drill string is more secure than a railbolted to the wall o~ the bored raise, or a cable and hoist system.

3) There is no time lost in installing a rail as ladders.
The mobile service rig in accordance with the present invention can be used for construction, civil engineering as well as mining purposes, wherever a service platform is required to walk up and down a pipe system.

Claims

1. A mobile service rig adapted to move up and down a pipe system, comprising:
a) a work platform adapted to be slideably mounted on the pipe system;
b) a pair of fluid powered motors secured to the work platform, each consisting of a piston and a cylinder;
and c) pipe grippers attached to the piston of each cylinder and adapted to engage the pipe system whereby by alternately operating the cylinders and pipe grippers, the work platform may be moved up and down the pipe system.

2. A mobile service rig as defined in claim 1, when used to service a bored raise, further comprising rollers mounted on the work platform and adapted to engage the bored raise wall and the pipe system to ease movement of the work platform in inclined raises.

3. A mobile service rig as defined in claim 1, when used to service a bored raise, further comprising gripper pad mounted on the work platform to fasten the platform against the bored raise wall while working on the platform.