Transcript Junk Mill Bit with Interchangeable Inserts ITEC 3380 Managing

Roy Alvarado, David Marrufo
Tony Reyes, and Erin Webster
Problem
Here in west Texas
many oil, drilling
and well servicing
companies face a
problem with down
time.
Many of these
companies would
like to reduce
downtime; the
less time spent
changing out bits
and tools the
more profitable
the company is.
Purpose of Project
When drilling or
working over wells
there are times when
pipe is stuck or
broken off when
being pulled out of
the well.
When this occurs you
will go after it with
fishing tools.
Tool design.
Downtime- unproductive rig time, in our case due to
changing milling tools
 Fishing- the process of retrieving a lost object from a well
bore
 Inserts- the interchangeable tool end of the junk mill
assembly which can come in different designs for different
applications
 Junk mill bit- a tool usually used on fishing jobs to prepare
the pipe ends for the fishing tool
 Tungsten carbide rod- a composite rod which consists of
tungsten carbide chips with a brass media, it is used as the
cutting surface on the junk mill inserts cutting edge


Establish a shop

Marketing

Delivery

Competition

Personnel



Tool joint material = $50.00/ea
Tool joint Welding Labor (@$20.00/hr) = $60.00/ea
Tool joint Machinist Labor (@$20.00/hr) = $60.00/ea



Insert Material (1” Plate) = $30.00/ea
Insert Welding Labor (@$20.00/hr) = $60.00/ea
Insert Machinist Labor (@$20.00/hr) = $60.00/ea


Welding Rods (per insert) = $3.00/ea
Clusterite Rods (per insert) = $40.00/ea

Total approximate product cost (with 2 inserts): $363.00

86% of people surveyed expressed interest in our
interchangeable inserts

71% would like to reduce downtime on fishing jobs

50% of our customers are willing to pay between $1000 and
$1,500

$1,200 to buy a tool plus 2 inserts and $300 to re-tip

Or $500 to rent
Making a mill bit
consists
of two parts: Tool
Joint and
the
interchangeable
inserts.
Our first model will be
the weld type where the inserts
Will be welded on to the
Tool joint.
Our second model will be
fastened to the tool joint
by a threaded pin that secures
the insert, making it even
easier to exchange.

Design

Product Cost

Many Job Positions

Reduce downtime

These are Baker Hughes junk mills compared to our mill bit tool. Their Superloy junk mill is
designed for the milling of debris where milling inserts are considered too aggressive.
http://www.bakerhughesdirect.com/cgi/bot/resources/ExternalFileHandler.jsp?bookmarka
ble=Yes&channelld=546906701&programld=546999388&path=/private/BOT/public/fishing/conventional_fishin
g/milling_washover/superloy_junk_mill.html

These are Weatherford junk mills compared to our mill bit tool. Their aluminum casing
alignment tool has a simple, but rugged, design-aluminum blades welded to an aluminum
body.
http://weatherford.com/weatherford/groups/web/documents/weatherfordcorp/www01859
8.pdf

These are GOTCO International junk mills compared to our mill bit tool. Gotco junk mills
are available dressed with super tough Gotcoloy (crushed, sintered tungsten carbide.) They
also have them in many sizes. http://www.gotco-usa.com/millingwashover/junk_mills.html