# US 2014/0190714 A1 · Lead supporting device of drilling machine

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- Number: US 2014/0190714 A1
- Document ID: US20140190714A1
- Status: Published application
- Kind: A1
- Application number: 14/122,330
- Filed: 2012-06-07
- Published: 2014-07-10
- Earliest claimed: 2011-06-07
- Inventors: Suk Shin IN
- Web page: https://patentgrep.com/patent/US20140190714A1

## CPC

- E21B 15/00: Supports for the drilling machine, e.g. derricks or masts
- E21B 7/023: {the mast being foldable or telescopically retractable}
- E21B 15/04: specially adapted for directional drilling, e.g. slant hole rigs
- E21B 19/08: Apparatus for feeding the rods or cables (E21B19/22 takes precedence; automatic feed E21B44/02); Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

The present invention relates to a lead supporting device of a drilling machine. The lead supporting device of the drilling machine includes: a frame of the drilling machine; a lead coupled to the frame of the drilling machine by a hinge shaft, the lead being rotated in a predetermined angle; main cylinders disposed on the frame of the drilling machine and the lead to rotate the lead with respect to the frame; a head part elevatably disposed on the lead to perform a drilling process; a rotatable guide body coupled to the frame of the drilling machine by the hinge shaft; a guide rod rotatably hinge-coupled to the lead, the guide rod being slidable along the guide body; and a lead position fixing unit including a grasping part disposed on the guide body to fix the guide rod to the guide body, thereby fixing the position of the lead.

## Claims

### Claim 1

A lead supporting device of a drilling machine, comprising:
a frame of the drilling machine;
a lead coupled to the frame of the drilling machine by a hinge shaft, the lead being rotated in a predetermined angle;
main cylinders disposed on the frame of the drilling machine and the lead to rotate the lead with respect to the frame;
a head part elevatably disposed on the lead to perform a drilling process;
a rotatable guide body coupled to the frame of the drilling machine by the hinge shaft;
a guide rod rotatably hinge-coupled to the lead, the guide rod being slidable along the guide body; and
a lead position fixing unit including a grasping part disposed on the guide body to fix the guide rod to the guide body.

### Claim 2 (depends on 1)

The lead supporting device of claim 1, wherein a hollow part is lengthwise formed on a guide body installed in the frame of the drilling machine, a guide rod coupled to the lead by a hinge shaft is slidably coupled to the hollow part, a gripping part of the lead position fixing unit includes a support frame installed on the guide body, and first and second gripping members installed on the support frame to be rotatable about the support shaft, the first gripping member includes a first jaw for gripping the guide rod and a first shank unit extending from the first jaw and rotating the first gripping member about the support shaft, the second gripping member includes a second jaw for gripping the guide rod with the first jaw and a second shank unit extending from the second jaw and rotating the second gripping member about the support shaft, and the first and second shank units are connected to rods of cylinders installed in the support frame by first and second links.

### Claim 3 (depends on 2)

The lead supporting device of claim 2, wherein uneven parts are formed on the outer circumferential surface of the guide rod and inner circumferential surface of the first and second gripping parts to increase a gripping force, the uneven parts including recessed grooves formed on the guide rod along the outer circumferential surface of the guide rod and protrusions formed on the first and second gripping parts to be engaged with the recessed grooves.