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.

DRILL COLLARS:

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.

ANNULAR VOLUME:

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.

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

  1. 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
  2. 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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Responses

  • DEHAB
    WHY SIDPP FOR CALCULATION OF KILL MUD WEIGHT?
    9 years ago
  • jessica
    What are the driling pressure parameters?
    5 years ago

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