Category Archives: Oil Field Knowledge

Bulk Conversion Unit for Oilfield

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How many times are you asked about bulk conversion?

I have heard people asking like this “How many sacks of barite are equal to 1 cubic of barite?”, “How much is weight of one sack of cement?”, “I receive 20 tons of bentonite. What is the factor to covert my bentonite in ton to sacks”, etc.Therefore, I collect several useful conversions used for bulk on the drilling rigs.

The bulk conversion factors are listed below:

Fresh water

1 Gal (US) water = 0.83267 Gal (IMP)

1 Gal (US) water = 8.3453 lbs

1 Gal (US) water = 3.785 liters

1 liter of water = 2.2048 lbs

1000 liters of water = 2205 lbs

1 cubic meter of water = 2205 lbs

1 metric ton of water = 2205 lbs

1 metric ton of water = 264 Gal (US)

1 metric ton of water = 220 Gal (IMP)

1 metric ton of water = 6.29 BBL (US)

Diesel (Average Weight)

1 Gal (US) diesel = 7 lbs

1 Gal (IMP) diesel = 8.4 lbs

1 liter of diesel = 1.85 lbs

1 cubic meter of diesel = 1850 lbs

1 metric ton of diesel = 2205 lb

1 metric ton of diesel =315 Gal (US)

1 metric ton of diesel = 263 Gal (IMP)

1 metric ton of diesel = 1190 liters

Barite

1 sack of barite = 100 lb

1 cubic foot of barite = 135 lb

1 metric ton of barite = 2205 lb

1 metric ton of barite = 22 sacks

1 metric ton of barite =16.3 cubic foot

Bentonite

1 sack of bentonite = 100 lb

1 cubic foot of bentonite = 60 lb

1 metric ton of bentonite = 2205 lb

1 metric ton of bentonite = 22 sacks

1 metric ton of bentonite =36.8 cubic foot

Cement

1 sack of cement = 94 lb

1 sack of cement = 1 cubic foot

1 metric ton of cement = 2205 lb

1 metric ton of cement = 23.5 sacks

1 metric ton of cement =23.5 cubic foot

Gycol

1 Gal (US) glycol = 9.5 lb

1 Gal (IMP) glycol = 11.5 lb

1 liter glycol = 3.2 lb

Aviation Fuel (Average Weight)

1 Gal (US) aviation fuel = 6.8 lbs

1 Gal (IMP) aviation fuel = 8.2 lbs

1 liter aviation fuel = 1.8 lbs

 

Difference between True Vertical Depth (TVD) and Measured Depth (MD)

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I have a question asked regarding what the differences between True Vertical Depth (TVD) and Measured Depth (MD). Today, I will describe both definitions and their importance for calculation in a drilling field.

True Vertical Depth (TVD) is measured vertically from the surface down to a certain target down hole.

Measured Depth (MD) is the total length of the wellbore measured along the actual well path.

See the following illustration for more understanding.

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IWCF Well Control Quizzes

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My friend just sent me the very useful well control stuff again. This time is the IWCF well control quizzes by Transocean which use to train their people. The well control quizzes each contain 25 questions and are grouped into related topic areas ranging from fairly basic knowledge through to some of the harder calculations that supervisors may come across in their IWCF exam.

There are a total of 8 modules as follows:

1. Basic knowledge in well control

2. Basic pressure (hydrostatic pressure)

3. Warning signs and shut in

4. Shut in conditions

5. Volume and MAASP (Maximum Allowable Anticipated Surface Pressure)

6. Well control methods

7. Some tricky well control questions

8. Subsea well control questions

If you are interested in these handy well control quiz, please click at the image or the link below

 

Additional information: IWCF stands for The International Well Control Forum which is an oil industry Membership Organization established in Europe in 1992. Its primary purpose is to develop and administer well control certification programs for personnel employed in oil well Drilling, Workover and Well Intervention operations.

 

Drilling Bit Types and Drilling Bit Selections

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Currently in the drilling industry, there are two main categories of drilling bits: rolling cutter bits and fixed cutter bits. Plus, bit sizes vary from 3-7/8 inch to 36 inches.

 Rolling Cutter Bits

Rolling cutter bits, which some may also call roller cone bits or tri-cone bits, have three cones. Each cone can be rotated individually when the drill string rotates the body of the bit. The cones have roller bearings fitted at the time of assembly. The rolling cutting bits can be used to drill any formations if the proper cutter, bearing, and nozzle are selected.

There are two types of rolling cutter bits which are milled-tooth bits and tungsten carbide inserts (insert bits). These bits are classified by how the teeth are manufactured:

1. Milled-tooth bits

 

(Mill Tooth Bit)

Milled-tooth bits have steel tooth cutters, which are fabricated as parts of the bit cone. The bits cut or gouge formations out when they are being rotated. The teeth vary in size and shape, depending on the formation. Teeth of the bits are different depending on formations as follows:

Soft formation: The teeth should be long, slender and widely spaced. These teeth will produce freshly broken cuttings from soft formations.

Hard formation: The teeth should be short and closely spaced. These teeth will produce smaller, more rounded, crushed, and ground cuttings from hard formations.

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Top 10 Major Oil Companies In The World

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My friend collect the interesting information about top 10 major oil companies in the world. These companies are world wide and lead in technology and innovation. If you want to have a chance to work with multi-national environment around the world, you should consider these companies. Especially, nowadays the oil industry has been drastically growing up therefore your chance is open.

If you want to know about top 10 major oil companies in the word, please check out the following link or click at the image below.

Top 10 International Oil Companies InThe World