# 1252628080Copy of Well Control II

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```					    ENTER DATA IN YELLOW CELLS                                             WELL CONTROL WORKSHEET
ONLY                                                         FOR A SURFACE BOP STACK
WELL GEOMETRY                         SEC 1        SEC 2        SEC 3         SEC 4        SEC 5           SEC 6              SEC 7               DON
Length, ft? =                                      230          935          2,069        1,938         9,828
Hole Size, in? =                                    6.5          6.5           6.5          8.6          8.6
Pipe OD, in? =                                     4.75           4             4            4           4.5
Pipe ID, in? =                                     2.31         2.56          3.34         3.34         3.826
PRE-KICK DATA                                                                              MUD PUMP
Original Mud Weight, ppg? =                        18         Liner Size, in? =                                5                             6.5
TVD Last Casing Shoe, ft? =                      12,670       Stroke Length, in? =                            10                             12
EMW of Last Shoe Test, ppg? =                     18.6        Rod Size, in? =                                  2                              0     Created by C.R.
Slow Pump Pressure, psi? =                        1100        Pump Efficiency, %? =                          0.9                             95
Slow Pump Rate, spm? =                             40         TRIPLEX, bbl/stk                                                             0.0580
Volume Active Mud Pits, bbls? =                    472        USER NOTES . . . .
KICK DATA                                     A. Enter Well Geometry starting from bottom of hole in SEC 1.
TVD of Well, ft? =                               13,588        B. The pump output defaults to a TRIPLEX, if Rod Size equals zero.
C. Result in cell J24 is the TVD to spot a mud weight equivalent to last
SIDPP, psi? =                                     200              shoe test to generate a BHP equal to the hole being full of Kill Mud.
SICP, psi? =                                      600          D. Standard industry equations used for all calculations and solutions.
Pit Gain, bbls? =                                  25
CALCULATIONS
Kill Mud Weight                                   18.30       Mud Weight For a 100 psi Trip Margin, ppg                                    18.50
Initial Circulating Drill Pipe PSI                1,300       Estimated Length of Kick Material                                            1038
Final Circulating Drill Pipe PSI                  1,118       Estimated Density of Kick Material, ppg                                      10.59
Kill Mud - Surface to Bit, stks                   3,281       Max Allowable Casing Pressure, psi                                            395
Kill Mud - Surface to Surface, stks              15,400       Min Depth to Run Drill Pipe For a Kill Off-Bottom                            6,410
DRILL PIPE SCHEDULE                                                               DRILL PIPE SUMMARY
STROKES        PRESSURE          MINUTES      Capacity, bbls                                                                               190
0              1300              0         Displacement, bbls                                                                            85
328             1282              8         Surface to Bit, strokes                                                                     3,281
656             1264              16        Measured Depth or Length of Drill String, ft                                               15,000
984             1246              25                                                     ANNULUS SUMMARY
1313            1227              33        Capacity, bbls                                                                              703
1641            1209              41        Bit to Surface, strokes                                                                    12,119
1969            1191              49        Bit to surface, minutes                                                                     303
2297            1173              57                                                   BARITE REQUIREMENTS
2625         1155              66   Sacks Needed to Weight-Up 100 Barrels of Mud                                                      26
2953            1137              74   Total Sacks For System                                                                           361
3281            1118              82   Volume Increase in System, bbl                                                                    24
Density of kick material < 2 ppg = POSS GAS Mixing Rate, sxs/min                                                                             0.61
DRILL PIPE SECTIONS                      SEC 1        SEC 2        SEC 3         SEC 4        SEC 5           SEC 6              SEC 7
Barrels                                             1.2          6.0          22.4         21.0         139.8           0.0                 0.0
Strokes                                             21           103          387          362          2410             0                   0
Displacement, bbl                                   3.8          8.6           9.7          9.1          53.6           0.0                 0.0
ANNULUS SECTIONS                        SEC 1        SEC 2        SEC 3         SEC 4        SEC 5           SEC 6              SEC 7
Barrels                                            4.4          23.8          52.8        109.1         512.8           0.0                 0.0
Strokes                                            76           411           910         1881          8841             0                   0
Annular Velocity, fpm                              121           91            91          41            44             -32                  0

A GENERAL WELL KILL PROCEDURE FOR "WAIT & WEIGHT METHOD" USING SURFACE BOP STACK
1. Increase mud weight in active pits to KILL WEIGHT.
2. Zero stroke counters. Start pump and simultaneously open choke. Pressure on the choke initially should be the
shut-in casing pressure and this pressure should be maintained while the pump rate is brought up to the kill rate.
3. HOLD PUMP RATE CONSTANT and adjust choke so that the drill pipe pressure follows the above schedule. If drill
pipe pressure is too high, open the choke slightly; if it is too low, close choke slightly.
4. After the Kill Mud has filled the drill pipe, MAINTAIN CONSTANT PUMP RATE and CONSTANT DRILL PIPE
PRESSURE until the annulus is filled with the kill mud.
5. When kill weight mud reaches surface, stop pump and shut well in. At this time, the casing pressure and drill pipe
pressure should be zero. If some pressure still exist on casing, open choke slightly and bleed a small amount or
volume of mud. If the well is dead, pressure should fall to zero and the flow should stop.
Reference: LSU Blowout Control School Manual, LSU Baton Rouge, LA.
DON'T REMOVE! - APPLICATION CALCS
BHA Annular Capacity, ft/bbl    52.29
DP Annular Capacity, ft/bbl     39.22
SICP - SIDPP                     400
Gradient of Original Mud Weight 0.936
Strokes per step                328.1
Pressure per step                18.2
Minutes per step                  8.2
Created by C.R. Palmer, Lafayette, LA. Jan '92

al, LSU Baton Rouge, LA.

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