Drilling Parameters
KICK DATA
Weight-On-Bit (WOB) Rotary Rate (RPM) Normal Pump Circulating Rate Slow Circulating Rate Kill Rate Pressure
25,000 lb 100 rpm 60 SPM 20 SPM 280 PSI
SIDPP = 550 PSI SICP = 950 PSI
WELL AND PRE-RECORDED DATA
DEPTH:
DRILL BIT PARAMETER
BIT SIZE:
NOZZLE SIZE: BIT MODEL TYPE
MEDIUM HARD
DRILL PIPE:
5", 19.5 LB/FT, GRADE E Capacity=0.0178 BBL/FT.
6 / " x 2 13/16 ", Capacity=0.0080 BBL/FT. Length=600 FT
CASING:
MUD PROPERTIES: MUD DENSITY MUD GRADIENT VISCOSITY YIELD POINT PUMPS NO. 1 & 2:
LOT 1500 PSI with 10.00 PPG mud.
9 5/8", 47 LB/FT, N-80 set at 5,000 FT Length=600 FT.
National 12-p-160, 6 Liners, 0.117 BBL/STK at 95% Efficiency
Drill Collars in Open Hole=0.030 BBL/FT Drill Pipe in Open Hole =0.0459 BBL/FT Drill Pipe in Casing =0.030 BBL/FT
2. Examine the Kill Sheet (Engineering Method) below and observe how the various parameters have been computed.
ENGINEERS' METHOD KILL SHEET PRE-RECORDED DATA KICK DATA
Original Mud Weight (OMW)......( 9.0) PPG SIDPP = (550) PSI.
Measured Depth (D) ..............(8,000) FT SICP = (950) PSI
Slow Circulation Rate (SCR)......( 20) SPM PIT GAIN = (10) BBL
Kill Rate Pressure (KRP)............( 280) PSI TVD = (8,000) FT
DRILL STRING VOLUME DRILLING PARAMETERS
- Drill Pipe Capacity : Weight On Bit (WOB) =( 2500 )LBS ( 0.0178) BBL/FT x ( 7400 )L, FT = (131.72 ) BBLS Rotation Per Min. (RPM)=( 100 )RPM
- Drill Collar Capacity: Norm. Circ. Rate (NCR)=(60)SPM (0.008) BBL/FT x (600)L, FT = (4.8 ) BBLS Slow Circ. Rate (SCR) =(20)SPM
Drill String Volume (Total ) = (136.52) BBLS
Pump Output(0.117)BBLS/STK @ (95) % Efficiency
Drill String Strokes = (Drill String Vol. (136.52)BBLS, = 1166.84 STKS Pump Output ( 0.117) BBLS/STK
CALCULATIONS Kill Weight Mud:
SIDPP( 550) PSI + 0.052 + TVD( 8,000 )FT + OMW( 9.0 ) PPG = (10.32) PPG Initial Drill Pipe Pressure:
SIDPP 550) PSI + Kill Rate Pressure(280) PSI = (830) PSI Final Drill Pipe Pressure:
Kill Weight Mud(10.32)PPG x Kill Rate Pressure(280)PSI = ( 321 ) PSI Original Mud Weight (9.0)PPG)
PRESSURE CHART
Strokes to Bit-
PRESSURE CHART
|
STROKES |
PRESSURE |
|
O |
830.00 - |
|
100 |
786.34 |
|
200 |
742.76 |
|
300 |
699.14 |
|
400 |
655.52 |
|
500 |
611.90 |
|
600 |
568.28 |
|
700 |
524.66 |
|
800 |
481.04 |
|
900 |
437.42 |
|
1166.84 |
321.00 " |
Initial Drill Pipe Pressure
Final Drill Pipe Pressure
- a) The following data are either given or computed prior to the drilling operation:
- Pre-Recorded Data
- Drill String Volume
- Drilling Parameters
- b) Kick-Data
Recorded when kick warning signs are observed.
(c) Calculations
Performed using information from (a) and (b) and given formulas.
(d) Pressure Chart Calculations Stroke Column:
If the Drill String Stroke is less than 1500 Strokes, choose Stroke Increment to be 100. If the Drill String Strokes is more than 1500, then choose Stroke Increment to be 200 strokes.
* Add Stroke Increment to each previous stokes until "Stoke to Bit" is reached.
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