Down Hole Tools and Drilling Subs
DOTS manufacture and develop the down hole drilling tools by using certified alloy steel comply with international standards such as drilling string subs, BHA tools, as per API Spec 7-1, API Spec 7-2 such as:
- Top Drive Saver Subs (TDS Subs)
- Kelly Saver Subs
- Lifting Subs (Squared and Tapered)
- Crossover Subs (Double Pin, Pin X Box)
- Bit Subs
- Lifting Plugs
- Lifting Caps
Crossover and Subs
DOTS supply the X-Over Pin (Male) x Box (Female), Pin (Male) x Pin (Male) and Box (Female) x Box (Female) for Drilling string crossover sub.
DOTS’s Crossover Sub (X-Over) is used for crossing over from the size of a single connection to the. Also used for prolonging the connection life of a more expensive drilling component.
Drilling String Crossover Sub are available with:
– Box x Pin
– Box x Box or
– Pin x Pin Connections
Crossover Sub is manufactured from 4145H. The connections are protected by a phosphate surface coating that reducing the galling when the initial make-up takes place. Sub is manufactured according to API 7-1 Specification.
In addition, DOTS also supplies variety of rotary sub:
Straight Sub
Straight Sub is used to connect drilling string components that have a similar outside diameter.
Reduced Sub
Reduced Sub is used to connect drilling string components that have different diameters that warrant the cross-sectional change necessary to accommodate different connections. This sub would be used to crossover large OD drilling tools or a tapered drill collar string.
Saver Sub
Saver Sub is used to extend the life of the Kelly by taking the connection wear each time it is made up to a drill stem component.
Repairing and rethreading of all kind of rotary shoulder connections & numbered connections for:
– Drill pipes
– Drill collars
– Kelly Drive
– Drill Stem Subs
– Stabilizers
– Reamers
Many hardened and ground gauges on hand to ensure accurate measurement of all the threads being repaired or manufactured.