Term
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Definition
| Bottom Hole Assembly, from the Bottom Up |
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Term
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Definition
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Term
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Definition
Mud Motor
(Mud Lube or Sealed Bearing)
Turbine Motor |
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Term
| Drilling Mud Motor Typical Sections: |
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Definition
o Bearing Section, with a Sleeve or Stabilizer if desired
o Drive Section:
Straight or with Bend Housing Fixes or Adjustable, over a Drive Shaft
o Power Section: Rotor & Stator
o Top Sub (usually with a Rotor Catch, and Float Valve) |
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Term
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Definition
| (Measure/Logging While Drilling Tool) |
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Term
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Definition
o Stabilizer
o Reamer or Under-Reamer |
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Term
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Definition
o Drill Collar
o Flex Collar
o Pony Collar |
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Term
| Heavy Weight / Heavy Wall Drill Pipe kinds |
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Definition
o Standard with a Center Upset (Wearpad)
o Spiral Cut
o Tri-Spiral Cut |
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Term
| TH Hill Standard DS-1 (Drill-String 1) is |
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Definition
API standord
does cover: Drill Pipe and the Connections |
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Term
| API TH Hill Standard DS-1 (Drill-String 1) standard covers. |
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Definition
| Drill Pipe and the Connections |
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Term
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Definition
a small component
sacrificial
protects:
Drilling Motor
Drill Collars
other Tools further up the Drill String. |
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Term
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Definition
A spiral cut tool uses in the central of the Drilling Motor Power Section.
Typically it is made from carbon steel, then plated, requiring PT inspection except on the connections |
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Term
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Definition
| attached to the top end of the rotor which extends into a Top Sup or Saver Sub |
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Term
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Definition
The outer housing of the Drilling Motor Power Section.
A High-Strength Steel with a contoured rubber lining.
requires detailed and accurate measurement with a Durometer, and Visual Inspection with a Boroscope. |
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Term
| Drilling Motor Drive Shafts. The most common varieties are. |
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Definition
CV Joint – the most common type in use
U-Joint – only found on older or older design motor, crude, bulky and inefficient
Flex Shaft (Titanium) – used on select brands or premium motors |
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Term
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Definition
Drill Collar
Pony Collar
Spiral Drill Collar
Square Cut Drill Collar
Flex Drill Collar |
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Term
| Drill Collars what are materials |
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Definition
may be carbon steel
usually Inconel or other Non-Ferromagnetic materials |
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Term
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Definition
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Term
Drill Collars typical length:
Pony Collar typical length: |
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Definition
Drill Collars are typically 30 ft.
A Pony Collar is ½ size (15 ft). |
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Term
| Drill Collars what they are/ do |
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Definition
are one of the key components in the BHA.
They provide the weight on bit to drill the well
and keep the Drill Pipe in tension to prevent buckling.
When used without Stabilizers, Drill Collars tend to buckle and cause unwanted deviation. |
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Term
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Definition
prevert Drill Collars from buckling
increase stiffness
usually one or 2 |
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Term
| Non-Magnetic Slick Drill Collars (Round) and Pony Collars |
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Definition
provide the required weight on bit, will
not interfere with directional measurements and are ideal for housing MWD tools. |
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Term
| Non-Magnetic Flex Drill Collars |
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Definition
are thinner and more flexible
well suited for housing MWD equipment. |
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Term
| Non-Magnetic Spiral Drill Collars |
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Definition
allow greater flow area for drilling fluids
non-magnetic steel |
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Term
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Definition
maximize the available weight on bit
larger cross sectional area
stiff and rigid
prevents deviation
four-point stabilization
prevents buckling. |
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Term
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Definition
prevent differential sticking of the Drillstring by stabilizing the BHA and keeping drill
collars and Drill Pipe away from the borehole wall. This reduces vibration, Drill Pipe whirl, and wellbore
tortuousity; moreover, the stabilization maintains drilling trajectory whether drilling straight,
horizontal, or directional wells |
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Term
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Definition
Range 1 - 18 ft to 22 ft
Range 2 - 27 ft to 30 ft
Range 3 - 38 ft to 45 ft |
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Term
| most common size of drill pipe |
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Definition
| Range 2 is the most common length, increasing Range 3 is becoming preferred |
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Term
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Definition
reduce torque and drag,
increase the rate of penetration,
improve operational efficiency |
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Term
| Agitator Oscillation Tools |
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Definition
gently oscillates the Bottom Hole Assembly to significantly improve weight
transfer and reduce friction. This improves weight transfer and reduces stick-slip in all modes of drilling,
but especially when oriented drilling with a steerable motor. The Agitator Oscillation Tool provides BHA
excitement to improve weight transfer to the bit. Extends the boundaries of extended reach drilling
with motors, or enhance efficiency in less complex or rotary applications. |
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Term
| Most Subs are generically referred to as “Dumb Iron” because |
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Definition
they are not mechanical devices, even if
they may internally hold a device when used down hole.
There are exceptions such as some of the valves. |
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Term
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Definition
used to lift BHA components
Lift subs are simply screwed to the
top of the tool and feature an elevator
groove, engineered to API specifications,
that the rig uses to pick up the tool. |
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Term
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Definition
| connect the drill bit to the next piece of equipment |
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Term
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Definition
allow the crossover from large connections to
smaller ones and visa versa. |
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Term
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Definition
| house a float valve, aka back pressure valve |
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Term
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Definition
functions as a safety between the wellbore and the
inside of the Drillstring to prevent drilling fluids from back flowing up to surface. |
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Term
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Definition
repetitious connecting of Drill Pipe is absorbed by this sacrificial saver sub.
wares out instead of the kelly |
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Term
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Definition
designed for use during well servicing and Workover operations.
A Safety Valve is a full opening valve
provides positive pressure control of the fluids in the drill string
seals in both directions with metal to metal seals. |
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Term
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Definition
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Term
| most common types of drill bits |
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Definition
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