Wireline Logging Tools - Measure Points

To the non-wireline logging engineer, every logging tool looks like a piece of shiny metal pipe. In reality, these tools have some of the most sophisticated electronic, hydraulic and mechanical systems embedded within. hydraulic tools

Wireline logging tools measure a variety of petrophysical properties from basic  radioactive gamma-ray from the rocks to porosity and density. There are much more
complex measurements being developed as technology evolves.

Each logging tool has a measurement sensor positioned within the tool, the rest of the tool consists of the electronic or hydraulic components. Logging service companies have acquisition software which acquires and processes the data from the logging tools. Typically several tools are connected together to acquire several petrophysical properties in one descent in the oil/gas well. It is the function of the acquisition software to collect all this data and tie all the measurements to a given depth. This is where it is important that the correct tool measure point is used by the software. Typically this is done automatically by the software when the tools are selected. The engineer has the option to change the measure points in special cases, however this is rarely required.

There have been incidents where the engineer erroneously changes the measure points and also cases where a software bug results in wrong measure points being used. This has resulted in tool measurements assigned to wrong depths. This will cause serious problems when interpreting the log data and assigning rock properties versus depth. This resulting depth shift in the measurement can sometime not be detected immediately especially if they are <5ft.

The easiest way to detect this problem is to view the measure points on the tool diagram generated by the acquisition software prior to acquiring the data. Also this problem can be detected by the engineer or petrophysicist while quality checking the logs, preferably real-time while logging.

Hydraulic

Hydraulic sealless tools are those that are meant for the larger jobs. They contain air pumps that help them operate. They may require some manual work by the operator or they may be entirely automatic. These are large machines that can take care of constant strapping. Anytime that a company has to strap large orders that may not be able to be manually strapped, the hydraulic sealless tool can take care of it.

These machines will usually accept the different types of strapping. All that is required is that they are changed based on the size and weight of the item that is being strapped. This forms a strong hold so that the items do not fall.

Pneumatic

A pneumatic sealless tool is not usually used in a home environment. It is mainly used within a business environment. It is ideal for strapping packages that are flat. It doesn't weigh much and it has an air motor that can save a lot of time when strapping these packages together. It can even adjust the tensioning and is great for strapping together such items as wood slats. It can be turned horizontally or vertically to strap and can literally be used within any environment that requires flat items to be strapped.

Then of course there is the fact that there are different types of pneumatic sealless tools. Some use steel strapping with different widths and different thicknesses. What size strapping you need will determine which pneumatic sealless tool you buy. However, what you're strapping is going to determine what kind of strapping you need.

In conclusion

The differences between the different types of sealless tools are quite obvious and the types of items being strapped and shipped are going to determine what kind of sealless tool is needed. The size and weight of the item is also going to determine what kind of strapping is needed. This is necessary for both the security of the items and of the people working around them.