REGULAR STAB-IN CEMENTING OPERATING PROCEDURES EQUIPMENT
REQUIREMENTS Stab-In Float Shoe or Collar Model 154 Stab-In Stinger
to match 3.5" I.D. receptacle Centralizer(s) to fit drill pipe O.D.
and casing I.O. Running tools -false rotary plate, bowl & slips
for drill pipe Top-out connection (crossover from cementing lines
to drill pipe) PRELIMINARY INSPECTION
Inspect float equipment for damage and verify that size, thread,
weight, and grade match casing being run. Verify that receptacle is
clean and has 3.5" diameter smooth bore for stab-in adapter.
Thread Stab-In Stinger onto drill pipe hand-tight to insure
threads match drill pipe being run, then remove. Measure O.D. of
stinger to insure fit within 3.5" I.D. receptacle.
Inspect drill pipe centralizer(s), stop collar(s), false rotary
plate, bowl and slips to verify that they are in good condition and
suitable for use with drill pipe and casing to be run.
Verify that top-out connection contains no foreign objects and
that the thread or crossover matches drill pipe. PROCEDURE
1. While running casing, install Stab-In Float Collar or Shoe at
desired location in casing string and run to setting depth. It is
recommended that Weatherford Tube Lok be applied to the threads of
the float equipment and the first 4 to 6 joints of casing to
prevent unthreading during drillout. Fill the casing from the
surface to keep casing from floating and to prevent excessive
collapse pressures from acting on the casing.
2. Land casing as close to rig floor as possible. Rig up to run
drill pipe. NOTE: Large diameter casing strings may need to be tied
down if a low-density displacement fluid is used to displace a
high-density cement column, causing the casing to float.
3. Pick-up first stand of drill pipe to run in hole. Install
drill pipe stop collar 3 to 4 feet above tool joint. 4. Screw
Stab-In Stinger to bottom of drill pipe and torque connection to at
least 2000 ft-lbs torque. Dope Stab-In
Stinger nose and O-rings liberally.
5. Place centralizer around stop collar on drill pipe. NOTE: If
hole is deviated more than 5 deg. or dogleg is present adjacent to
Stab-In Float Collar or Shoe, more than one centralizer may be
recommended to guide stinger into receptacle. Consult Weatherford
Gemoco engineering personnel for recommended centralizer spacing in
these situations.
6. Lower drill pipe and centralizer(s) into casing. After
centralizer(s) pass top of casing, place false rotary plate, bowl
and slips above casing. Run drill pipe.
7. When reaching vicinity of float equipment with stab-In
Stinger, lower drill pipe slowly until stinging in and set
approximately 20,000 to 30,000 lbs. of weight on the receiver.
NOTE: Actual weight (in lbs.) needed to hold stinger in receptacle
while cementing = Maximum surface pressure (in psi) x 9.62 sq.
in.
G2O02WEATHERFORD. All Rights Reserved. This document is the
confidential property of Weatherford International, Inc. and may
not be reproduced in any form, either whole or in part, or
distributed without the express written authorization of
Weatherford International, Inc. Weatherford International, Inc.
makes no representation as to the accuracy or completeness of this
document
8. Make up Top-out connection to the drill pipe landing joint.
9. Fill volume between casing and drill pipe with mud. Break
circulation through drill pipe.
NOTE: The mud level between the drill pipe and the casing may
rise slightly due to expansion of the drill pipe. If the mud level
continues to rise, the stinger may not be stabbed into the
receptacle. In this case, stop circulation, pick up stinger off of
float equipment, and re-stab stinger into receptacle. Rotating
drill pipe while stabbing-in will help stinger enter receptacle if
off-center.
10. After circulation and conditioning of hole is complete, rig
up cementing lines and pump cement.
11. Displace cement with calculated amount of displacement fluid
to remove all cement from drill pipe. Cement can be over displaced
if a stab-in collar is used with one or more joints below. If a
stab-in shoe is used, cement should be under displaced. Excess
cement can be washed out after checking floats and pulling stinger
out of receptacle. NOTE: Be careful while displacing not to exceed
pressure required to overcome weight holding stinger in receptacle.
Maximum allowable displacement pressure (in psi) = weight (in lbs)
of drill pipe slacked off onto stinger divided by 9.62 sq. in.
12. Check to determine if float equipment is holding by
releasing pressure and observing volume of flow-back, allowing for
aeration. If excessive flow-back without loss in pressure is
observed, pump calculated displacement and check float equipment
again.
13. With float equipment holding and flow-back stopped, pull
drill pipe out of hole.
14. Remove Stab-In Stinger, centralizer(s), and stop collar(s)
from drill pipe.
