PRODUCT MANUAL
Series 70 and 150
Overshots
DOCUMENT
Manual A120
PAGE
1
FISHING TOOLS
11006 Lucerne Street | Houston, Texas 77016 | T: +1 281 219 6613 | Fax: +1 281 219 6638 | [email protected]
Revision: March 2022.
OVERVIEW
The Logan Series 70 Short Catch Over-
shot is designed for conditions when the
fish is too short to be engaged with a
standard overshot. The grapple control is
positioned above the basket grapple rath-
er than below it to allow the basket grap-
ple to occupy the lowest position in the
bowl. This enables the overshot to firmly
engage and retrieve a very short fish.
CONSTRUCTION
The Logan Series 70 Short Catch Over-
shot assembly consists of a top sub,
bowl, basket grapple control, and
a basket grapple. This overshot has no
guide. The basket grapple is inserted
into the bowl from the top. The design
of the bowl allows the basket grapple
to fit in the lowest position. The basket
grapple control finger then fits into the
top of the basket grapple.
OPERATION
Before making up the overshot on the
fishing string and running it into the
well, be sure the overshot is properly
assembled and dressed with the proper
size grapple. Each Logan Series 70
Short Catch Overshot is designed to
engage a specific maximum outside
diameter. Each overshot can be dressed
to engage any smaller diameter by
installing the desired size of basket
grapple. Refer to the Parts Lists on pages
3 – 4.
Check to make sure all of the compo-
nents are in good working order. Make
up the overshot on the fishing string and
run it into the well. Although the Series
70 Overshot has no guide, the compo-
nents function in the same manner as
the standard Logan Series 150 Releas-
ing and Circulating Overshot.
When the overshot reaches the top of
the fish, combined rotation and lowering
results in the following:
1. Because this overshot has no guide,
the bottom of the bowl directs the
fish into basket grapple.
2. The grapple expands and the fish
passes into it until it reaches the pin
section of the top sub or the stop of
a basket grapple.
3. The fish is now properly positioned
in the overshot. The tapers of the
bowl will contract the grapple and
securely hold the fish when upward
pull is exerted on the string.
A sharp downward bump positions
the largest portion of the bowl tapers
opposite the grapple and breaks the
hold between the bowl and grapple.
Right-hand rotation expands the
left-hand wickers in the grapple and
the overshot can then be withdrawn
from the fish by elevating the fishing
string.
CATCHING A FISH
Attach the Overshot to the bottom end
of the fishing string and run it into the
hole. The Logan Series 70 Overshot
assembly is rotated to the right and low-
ered as the fish enters the expand-able
grapple. Simultaneous rotating and
lowering is important. With the fish in
the grapple, stop right-hand rotation
and allow the torque to slack out on the
fishing string. Exert an upward pull to
fully capture the fish.
RELEASING A FISH
A sharp downward force (bump) is
applied to the overshot to break the hold
of the grapple within the bowl. The over-
shot is then rotated to the right while it
is slowly elevated to release the grapple
from the fish until the overshot is clear
of the fish. Simultaneous rotation and
elevation is important.
To release from a recovered fish, follow
the same procedure while holding the
fish below the overshot.
PRECAUTIONS
Never rotate the fishing string to the
left while the overshot is engaged with
the fish unless an upward strain is
maintained.
Always bump down the full weight of
the fishing string before starting re-
leas-ing operations.
MAINTENANCE
Maintenance is simple, but important
to prolong the life of the tool and guard
against misruns. Disassemble and
inspect the tool after each use. Check
the grapple wickers for dullness and
replace if necessary. Make other repairs
as required and reassemble.
Paint or grease the exterior of the over-
shot to prevent rust or deterioration.
Disassembly
1. Using a vise, clamp the bowl be-
tween the threaded ends. Remove
the top sub by breaking loose the
threaded connections between the
top sub and bowl.
CAUTION: Excessive force can
distort or crack the bowl. Use only
enough gripping action in the vise
to break the connections. Avoid mak-
ing heavy tool marks on the bowl.
2. The control must first be lifted out
through the top of the assembly.
Using right-hand rotation, unscrew
and remove the grapple from the bowl.
Before reassembly, inspect all parts,
especially the grapple. Check the
wickers for damage and wear to
ensure safe operation. Grease parts
as they are reassembled. Grease or
paint the exterior to prevent corrosion.
ORDERING INFORMATION
When ordering, please specify:
(1) Complete assembly or part number
(2) Top sub connection
(3) Size and type of fish to be caught
(4) O.D., if other than standard
Series 70 Short Catch Overshots
