Drilling Formula Excel Sheet Version 1.3 Version 2012 Free Download

Today, we would like to distribute the new update

Drilling formula version 1.3. It is still totally FREE!

What new drilling formulas are added into the drilling formula version 1.3?

Effective Viscosity

Hydraulic Horse Power (HPP)

Optimum Flow Rate for basic system

Power Law Constant

Pressure Loss Annulus

Pressure Loss Annulus With Tool Joint Correction

Pressure Loss Drillstring

Pressure Loss Drillstring With Tool Joint Correction

Pressure Loss in Surface Equipment

Reynold Number

How many total useful drilling formulas in this version?

There are a total of 87 formulas which are divided into 7 categories (Applied Drilling Formulas, Basic Drilling Formulas, Directional Drilling Calculation, Drilling Fluid Formulas, Engineering Formulas, Hydraulic Formulas and Well Control Formulas).

Download Now For Free!!!

View the original article here

Release of SPR Crude

Actions of OPEC and free market factors were already in place to bring oil prices down. It is the stated goal of OPEC members to get oil trading between $75.-$80 bbl . The fundamentals for this price reducing goal were already in place, along with market forces which had oil predestined to meet these goals. The Obama administration is simply seeking to capitalize on a pre-existing market dynamic and claim undue credit in order to translate falling pump prices into votes. A scheme that , with the help of the media and an oil-ignorant populace, will likely work.

Release of crude from the SPR is a bad idea, decreases national security and is, in this instance, DEFINITELY politically motivated. If the administration was truly concerned about fuel prices at the pump, they would place a moratorium on federal fuel taxes, and if release of SPR crude were out of "genuine concern" (which it is not) they'd have taken this action , and tooted their horn about it, a few months ago when prices were reaching their peak and still climbing (it wouldn't have helped prices back then, just as it won't in the big picture now, but at least now, in a falling market, it is easy to put forth the appearance that the release of SPR crude is accomplishing something).

Comment by Drilling Ahead on June 26, 2011 at 10:45am I have to agree 100% Chris. Our share of the 60 million barrel release(which would fuel the world for 17 hours) is 30 million barrels. What does President Obama plan to do with the revenue from the 30 million barrels? Is he just using this as smoke and mirrors to get his hands on billions of dollars in extra spending money for Congress? When we replace the 30 million barrels we released-it will be at a higher price and in the end it will just be another colossal waste of taxpayer money.Comment

View the original article here

Geo-Pressured Shale Causes Stuck Pipe

Pore pressure in shale is more than hydrostatic pressure; however the well does not flow because shale is in permeable. While drilling through pressured shale formation, pressure in shale causes fractures of shale due to stress crack.

Shale finally falls into the well and results in stuck pipe incident.

Warning signs of geo-pressured shale

• Shale fractures are seen at shale shakers.

• Possibly observe change in d-exponent, which means a sign of abnormal pressure, from mud logger.

• Pump pressure abnormally increases.

• Increase in rate of penetration (ROP).

• When compared to a normal trend, torque and drag trend abnormally increase.

• Background gas may increase.

Indications when you stuck due to geo-pressured shale

• It could be happened either while tripping or drilling.

• When it happens, the hole may be completely packed off; therefore, circulate is restricted or impossible in some cases.

What should you do for this situation?

1. Attempt to circulate with low pressure (300-400 psi). Do not use high pump pressure because the annulus will be packed harder and you will not be able to free the pipe anymore.

2. If you are drilling or POOH, apply maximum allowable torque and jar down with maximum trip load.

3. If you are tripping in hole, jar up with maximum trip load without applying any torque.

4. Attempt until pipe free and circulate to clean wellbore.

Preventive actions

1. Use proper mud weight to create over balance. You may need to weight up prior to drilling in to high pressure shale zones.

2. Minimize surge pressure and equivalent circulating density (ECD) in the wellbore.

Reference: Drilling formulas blog in the section of stuck pipe

View the original article here

Overburden Stress Shale Causes Stuck Pipe

Overburden stress increases over depth (the more a well is drilled, the more overburden stress will be seen). When mud weight is not enough to support the overburden, the stress from the overburden will create shale fractures which will fall down into the wellbore. Finally, shale fractures will pack the wellbore and cause a stuck pipe incident,

(Mud weight is high enough to overcome overburden stress.)

(Mud weight is not high enough to overcome overburden stress.)

Warning signs of overburden stress shale

• Torque and drag increase.

• Pump pressure increase.

• Abnormal amount of shale at shale shakers

• Caving shape of shale at shakers

Indications when you stuck due to overburden stress shale

• It could be happened either while tripping or drilling (most likely while drilling).

• When it happens, the hole may be completely packed off or bridged off; therefore, circulation is very difficult or impossible to establish.

What should you do for this situation?

1. Attempt to circulate with low pressure (300-400 psi). Do not use high pump pressure because the annulus will be packed harder and you will not be able to free the pipe anymore.

2. If you are drilling or POOH, apply maximum allowable torque and jar down with maximum trip load.

3. If you are tripping in hole, jar up with maximum trip load without applying any torque.

4. Attempt until pipe free and circulate to clean wellbore.

Preventive actions:

1. Use drilling mud that heavy enough to stabilize overburden stress.

2. Weight up mud prior to drilling into stressed shale zones.

Reference: Overburden Stress Shale Causes Stuck Pipe in Drilling Formulas blog

View the original article here

Cutting Slip Velocity Calculation - the first way

Cutting slip velocity is velocity of cutting that naturally falls down due to its density. In order to effectively clean the hole, effect of mud flow upward direction and mud properties must be greater than cutting slip velocity (settling tendency of cuttings). Otherwise, cutting will fall down and create cutting bed.

You can learn more detail about it via this topic -> Cutting Slip Velocity

This calculation will show annular velocity, cutting slip velocity and net velocity so you can use as a reference for you hole cleaning indication. There are 2 calculation methods and I will show the first method via this topic.

1. Determine annular velocity with following equation:

Where;

AV is annular velocity in ft/min.

Q is flow rate in gpm (gallon per minute).

Dh is diameter of hole in inch.

Dp is diameter of drill pipe in inch.

2. Determine cutting slip velocity with following equation:

Where; Vs is cutting slip velocity in ft/min.

PV is plastic viscosity in centi-poise.

MW is mud weight in ppg.

Dp is diameter of cutting in inch.

DenP is cutting density in ppg.

3. Determine net rise velocity with following equation:

Net rise velocity = AV – Vs

Where; AV is annular velocity in ft/min.

Vs Cutting Velocity in ft/min.

This figure indicates that cuttings are being lifted by mud or are still falling down. If net rise velocity is positive, it means that you have good flow rate which can carry cutting in the wellbore.
On the other hand,If net rise velocity is negative, your current flow rate is NOT engough to carry cuttings.

Example: Please use the following information to determine annular velocity, cutting slip velocity, net rise velocity, and tell us if the flow rate is good for hole cleaning.

Information

Flow rate = 300 gpm

Hole Diameter = 6.3 inch

Drillpipe OD = 4 inch

PV = 15 cps

MW = 10 ppg

Diameter of cutting = 0.20 inch

Density of cutting = 20.0 ppg

1. Determine annular velocity:

AV = 310.3 ft/min

2. Determine cutting slip velocity:

Vs = 35.4 ft/min

3. Determine net rise velocity with following equation:

Net rise velocity = AV – Vs Net rise velocity = 310.3 – 35.4 = 274.9 ft/min

Conclusion: This flow rate is GOOD for hole cleaning practice because annular velocity is more than cutting slip velocity.

If you are interested in the spread sheet from this topic, please download from this site, Drilling Formula Calculation Sheet.

Reference from: drilling formulas

View the original article here

How To Determine Hole Size By Fluid Caliper

This article will demonstrate you how to determine hole size by fluid caliper. First of all, you need to know what is the fluid caliper is. The fluid caliper is one simple way to calculate hole diameter. The concept is based on hole volume, annular capacity, and inner capacity. You pump any substance and when you seen it on surface, you back calculate the hole size based on strokes pumped. It is quite tricky to explain so I would like you to see the example below which it will make you clear about what I say.

7” casing shoe is set at 5000’MD/4500’TVD

7” casing 23 ppf, ID 6.33 inch

4” drill pipe is used to drill the well and its ID is 3.34 inch.

4-3/4” drill collar is used as BHA and its ID is 2.5 inch. The length of drill collar is 500 ft.

This hole section is used water based mud and the bit size is 6-1/8”

Drill to section TD at 10,000’MD/9,000’TVD then drop carbide once TD is reached.

Pump output is 0.1 bbl/stroke.

Surface line from pumps to rig floor is 20 bbl.

Carbide is detected by a gas sensor on surface after 4,000 strokes pump.

With the given information, determine what is the hole size of the open hole section.

The basic drilling formulas that you need to know are inner capacity and annular capacity calculation.

1st step – Determine Inner Capacity and Annular Capacity of All Parts

Inner capacity of 4”DP

Inner capacity of 4”DP = 0.01084 bbl/ft

Inner capacity of 4-3/4”DC

Inner capacity of 4-3/4”DC = 0.00607 bbl/ft

Annular capacity between 4” DP and 7” Casing

Annular capacity between 4” DP and 7” Casing = 0.02383 bbl/ft

I assign “d” is the open hole diameter.

Annular capacity between 4” DP and open hole

Annular capacity between 4 3/4” DP and open hole

2nd step – Determine Volume of All Parts

Volume in 4”DP = Inner capacity of 4”DP x length of 4” DP

Volume in 4”DP = 0.01084 x 9,500 = 103 bbl

Volume in 4-3/4”DC = Inner capacity of 4-3/4”DC x length of 4-3/4”DC

Volume in 4-3/4”DC = 0.00607 x 500 = 3 bbl

Volume between 4”DP and 7” Casing = Annular capacity between 4” DP and 7” Casing x length of 4” DP inside 7” casing

Volume between 4”DP and 7” Casing = 0.02383 x 5,000 = 119 bbl

Volume between 4”DP and open hole = Annular capacity between 4” DP and open hole x length of 4” DP inside open hole

Volume between 4-3/4”DC and open hole = Annular capacity between 4-3/4”DC and open hole x length of 4-3/4”DC inside open hole

3rd step – determine hole size. The total volume pump is equal to total volume in the system.

With the pump output of 0.1 bbl/stroke, 4000 strokes equate to 400 bbl.

In the following equation, I account for the surface volume from the pump to the rig floor.

Solve the equation to get d, d is equal to 6.97”.

Answer:You will get the hole size based on the fluid caliper of 6.97 inch.

I wish this article will give you idea on how to calculate hole size based on the fluid caliper.

Ref: Drilling Formulas blog in the topic of How To Determine Hole Size By Fluid Caliper

View the original article here

Starting A Rig Washing Business

Another late night researching OSHA confined spaces and H2S safety.

Eagle Ford Shale is in my back yard, and started Crude Rig Washing LLC with my younger brother, we are two months in the works.

I'm now fully comply with federal, state, general liability insurance, workers comp, truck trailer, employees hired, have all the equipment to perform my service to the oil and gas industries, PPEs', MSDS, and the dream team, with two (bad to the brizzle!) seasoned veterans as senior supers.

All this week I have been back and forth to locations making contacts with company men, filling out vendor forms. Now I'm looking for that call or Email.

Being that this is a holiday weekend I figured it might be a little time waiting for a response from the companies I desired and prayed I will be working for to give me that conformation, that I'm accepted.

Much anticipation should be worth the hard work set forth by my brother and family who stood behind me asking, "What you going to do now? Why not just sell it, and go back into home building," thanks mom!!! (lol)

I just wanted to thank Drilling Ahead for the information I obtained, and the Rig Count helped me big time. I'm going to keep posted keeping D.A. members informed.

Open for job leads; let those companies know I exist, also new employment opportunities coming soon within the New Year.
Thanks,
Jacob
Crude Rig Washing, LLC

View the original article here