TM 5-3820-256-10
a.
Depress clutch.
b.
Place truck transmission in neutral position.
c.
Start truck engine.
d.
Engage power take-off control (2, Figure 2-23); PTO Indicator (1) will light.
e.
Release clutch.
2-18.
Night Lighting. Light switches are located on the control console in the truck cab. Use to turn night lights on and
off. (See Figure 2-24).
Section V. WELL DRILLING TECHNIQUES AND PROCEDURES.
2-19.
Drilling techniques and procedures.
WARNING
Drilling speed RPM must be reduced from the 2100 RPM while truck is in 5th gear. If this procedure is
not followed, a shock load is applied to the draw works drive chain, resulting in chain breakage.
a. General Information. The information that follows pertains, for the most part, to the use of equipment. Refer to
FM5-1 66, Well Drilling Operations, for general information about drilling wells. Because there are many types
and formations of earth, different methods of drilling may apply to every hole drilled. The information herein is
intended to be generic; it applies to all wells, although you may or may not utilize some of the procedures
described.
b. Starting the hole (wide mud circulation).
(1)
Attaching bit and sub.
(a)
Use the third drum line to maneuver small drill string components, such as the bit and the bit sub. A
hoisting plug is provided for connecting to those items.
(b)
Set the bit inside the drive sleeve below the rotary table. Disconnect the hoist plug and retract the third
drum line. Use tool joint compound on the drill bit's threads.
(c)
Connect the hoisting plug to the bit sub. Lower the bit sub through the rotary table opening and hold it
there with the break-out wrench. Remove the hoisting plug. Apply tool joint compound to the sub's
threads.
(d)
Operate the hoist drum and lower the kelly into position on top of the bit sub. Use a (36") pipe wrench
to screw the kelly into the bit sub. Remove the break-out wrench.
(e)
Lower the kelly and sub into position on top of the bit. Use the break-out wrench to hold the bit upright.
With the kelly drive bushings engaged in the rotary table, rotate the table to screw the kelly onto the
bit. Remove the break-out wrench.
(2) Drilling down the kelly.
(a) Fill the mud pits with water for circulating.
Change 1 2-79
