Fordia OWL User manual
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© FORDIA 2014 REV. Mai 2014
GENERAL DESCRIPTION
Fordia’s OWL shing tool, is an efcient water shing tool, designed to assure positive internal engagement of the sh, to
retrieve broken drill strings from a diamond drill hole. It is designed for sizes B, N, H, and P, wireline drill rods. The simple,
rugged design allows it to be released if the sh cannot be pulled.
CONSTRUCTION
The Fordia OWL shing tool consists of a 2 piece body containing 3 expansion lock wedges, attached to a plunger, supported
by a compression spring below. Each of the lock wedges is held in place by a scrub screw, threaded into the body of the plunger.
The size and type of the upper box connection can be supplied according to customer specication, right or left handed threads.
ASSEMBLY
The body of the shing tool threads apart, separating the tool in two and exposing the plunger, 3 lock wedges and the
compression spring. Each lock wedge is held in place by a scrub screw. The scrub screws should be threaded evenly into the
plunger, so that they do not protrude beyond the tops of the lock wedges. The plunger and lock wedges should travel smoothly
the full length of the channels. Ensure the tool is clean and lubricated. The spring is inserted into the head part before re-assembly.
INSTRUCTION
MANUAL
OWL Fishing Tool | Bottom part
OWL Fishing Tool | Expansion lock wedges
OWL Fishing Tool | Scrub screws
OWL Fishing Tool | Plunger
OWL Fishing Tool | Spring
OWL Fishing Tool | Head part
© 2016-05. All rights reserved.
ENGAGING THE FISH
RELEASING THE FISH
MAINTENANCE
Ensure that the top of the sh is known to the inch.
Lower the OWL shing tool to within 12” of the sh. Note the rod weight on the gage.
Lower the shing string slowly into the sh, by means of the hydraulic feed. The driller should never push the tool so far into
the sh as to bottom out on the adaptor to the shing string. This will eliminate the possibility of releasing the shing tool
from the sh.
Fill the shing string with water, and pump 150 psi water pressure onto the tool.
Pull back the rod string using the feed cylinder, and read the rod weight gage to determine whether or not you have engaged
the sh. An increase in rod weight on the gage indicates that the tool is engaged within the sh. The water pressure can
now be released, and the weight of the sh will keep the 3 lock wedges engaged. The rods can now be removed from the
hole, using a slow steady retrieval. There should be no downward movement of the drill string during this operation as this
can release the tool.
To release the sh, the water pressure must be turned off completely, and the water swivel removed from the drill string.
The driller must allow enough time for the water to completely drain out of the rod string through the holes in the head part
of the OWL shing tool. Once drained, all internal pressure is removed from the plunger. The rod string is then lowered a
few inches to retract the 3 lock wedges. Slowly pull the rods from the hole.
After each use, the shing OWL tool should be disassembled, cleaned and inspected for damage or signs of wear, and
lubricated. Proper maintenance of the tool will ensure good performance and extend the life of the tool.
OPERATION
Examine the tool for any damage and ensure all parts move freely, and that it is the correct size for the rods being shed.
A test should be done on surface to ensure proper t.
The hole should be ushed clean of all drilling muds and debris before lowering the shing tool.
Connect the tool to the shing string using a 6m rod of the same diameter as the tool. The pressure of water on the internal
plunger of the tool forces the attached lock wedges down and outwards on the taper of the tool body to positively engage
the sh.
© 2016-05. All rights reserved.
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