Oil Drilling


Recent Rotary Rig Count May 17th, 2013



AREA
 LAST
COUNT
DATE
COUNT 
CHANGE FROM
PRIOR COUNT 
DATE OF
PRIOR COUNT 
 CHANGE FROM 
LAST YEAR
DATE
OF LAST
 YEARS COUNT 

UNITED STATES 
5/17/13 
1769		 +0
5/10/13
-217
5/18/12

CANADA 
5/17/13		 118
+5
5/10/13
0
5/18/12 

USA OFFSHORE 
5/17/13 
 52		 +2
5/10/13
 +5
5/18/12 

INTERNATIONAL 
04/2013 
1301
 +33
3/2013 
 +123
4/2012 



Drilling Ahead

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Rachain Jetjongjit's Blog – August 2010 Archive (5)

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Tangential Method Calculation

The tangential method is the simplest calculation among other directional survey calculations.

Tangential Method Calculation

The tangential method formulas are listed below;…



TTangential Method Calculation formula Continue

Added by Rachain Jetjongjit on August 21, 2010 at 2:00pm — No Comments

Minimum Curvature Method Calculation

The Minimum Curvature Method smooths two straight-line segments of the Balanced Tangential Method by using the Ratio Factor (RF).







The formulas for the Minimum Curvature Method are listed below;







β must be in radians







Where;

MD = Measured Depth between surveys in ft

I1 = Inclination (angle) of upper survey in degrees

I2 = Inclination (angle)… Continue

Added by Rachain Jetjongjit on August 17, 2010 at 10:30pm — No Comments

Balanced Tangential Method Calculation

I have some directional calculations that I've shared with you. However, some of them are not shared yet so I will try to share all directional drilling formulas that may be helpful for you in the future.



Today, I would like to show you about Balanced Tangential Method Calculation. This calculation method… Continue

Added by Rachain Jetjongjit on August 9, 2010 at 3:30pm — No Comments

Lag Time and Its Importance for Well Control Operation

Drilling personnel need to fully understand about the lag time. Lag time is time delay from pressure adjustment made on a choke valve or a choke HCR to show up on the drill pipe pressure gauge.

Does it sound confuse? Let’s me explain more about it. When you adjust a choke position, you will not be able to see changes on the drill pipe gauge right away because drilling fluid is compressible so you need to be patient and wait a little bit until you see the… Continue

Added by Rachain Jetjongjit on August 5, 2010 at 9:30pm — No Comments

Driller’s Method in Well Control

Driller’s method is one of several methods to kill the well in well control operation. The main idea of driller method is to kill the well with constant bottom hole pressure. The Driller’s Method of well control requires two complete and separate circulations of drilling fluid in the well.…

Continue

Added by Rachain Jetjongjit on August 2, 2010 at 2:00pm — 1 Comment

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