Smith Services Dimensional Data Handbook

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“Smith Services Dimensional Data Handbook” is another excellent oilfield dimensional data book which I frequently use during engineering/field work.

There are several specification as listed below:

Drill pipe – API drill pipe, premium pipe, etc

Drill collar – Weight, grade, make up torque, etc

Heavy weight drill pipe – dimension, displacement, etc

Tubing /Casing– Atlas Bradford, Benoit Machine, Centroil international, Halliburton, Hunting Interlock, Hydril, Kawasaki Steel, Smith Fiber Grass, VAM, etc

Coiled Tubing – HS-70, HS-80, HS-90, QTI coiled tubing, QT series coiled tubing, etc

Fishing Tool – Hydra Jar, Drilling Jar/Accelerator, TM MAGNA Jar, ACCM Accelerator, TT Jar, Bowen, Several types of over shots, spear, pack off, etc.

Pipe recovery – free point indicators, buoyancy factor, pipe recovery formula, jet cutter, direct action chemical cutter with tubing, chemical cutter temperature and pressure rating

Milling tool – Packer milling tool specification and strength data, Flat bottom mill, tapered mill, etc

Technical information – general formulas, buoyancy factor, pipe recovery, annular velocity, string weight suspended in fluid, annular capacity, capacity of pipe, convert pressure drop to flow rate, pump output (both duplex and triplex), pressure loss for oil based mud/water based mud, etc

These contents are just only overview of all data in the book.

If you are interested in this book, you can download from the following link below

Finally, I wish my sharing would be helpful for you and your friends so please feel free to share this site.

 

Equivalent Circulating Density (ECD) Using Yield Point for MW less than 13 ppg

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Another way to determine equivalent circulating density (ECD) is to use yield point.

This formula below is used to calculate the ECD and it is good for mud weight less than or equal to 13.0 ppg.

Where:

ECD is equivalent circulating density in ppg

MW is mud weight in ppg

Hold ID is inside diameter of hole in inch

Pipe OD is outside diameter of pipe in inch

YP is mud yield point

YP can be calculated by these following equations

YP = Reading at 300 rpm – PV

PV = Reading at 600 rpm – Reading at 300 rpm

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Deal With Soft Clay Formation in Sea Water

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The well was drilled with sea water and the formation is soft clay formation. Then, the bit was totally plugged. We did not have any chance to displace well with water based mud prior to coming out of the hole. We flow checked and came out of hole to change the bit.

Because the formation is clay which will react with seawater resulting formation swelling, we need to develop specific rig procedure to deal with when tripping in hole.

What are the foreseeing issues?

• Clay formation swell

• Pack off due to formation instability

• Soft formation tends to get side tracked easily with mud motor

What is the objective?

• Attempt to condition the well before running back in hole with motor assembly to minimize chance of side track.

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Good Practice To Tag Top Of Cement

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After complete the cement balanced plug job, you should need to go back in hole and attempt to tag to see where the actual TOC is.

You should be careful when you try to find the top of cement otherwise you may not have a big problem.

These procedures are good drilling practice which you can adapt for your operation.

1. First of all, you need to know where the calculated TOC is.

2. Trip in hole to approximately 1-2 stands above TOC.

3. Make up top drive or kelly depending on the rig set up.

4. Bring pump up to slow rate. This depends on how the BHA is set up. I cannot specific flow rate.

5. Slowly wash down and monitor the weight.

6. Wash down until you see solid weight tagged on a driller gauge.

What will be happened if you don’t wash down to tag the top of cement?

The BHA may be in the green cement (cement is not properly set up) and when the pump is turn on, the cement will flash set. Finally, the drill string will get stuck.

 

If you want to know about struck pipe in the cement, please read this article “Soft Cement Causes Stuck Pipe”