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2. Measurement while drilling - Wikipedia

   en.wikipedia.org/wiki/Measurement_while_drilling

   LWD tools are able to measure a suite of geological characteristics including density, porosity, resistivity, acoustic-caliper, inclination at the drill bit (NBI), magnetic resonance and formation pressure. [6] The MWD tool allows these measurements to be taken and evaluated while the well is being drilled.

3. Logging while drilling - Wikipedia

   en.wikipedia.org/wiki/Logging_while_drilling

   Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA).. Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while ...

4. Driller's depth - Wikipedia

   en.wikipedia.org/wiki/Driller's_depth

   This consists of the drill bit, drill collars and stabilizers. It can also include a downhole motor, tools for measurement while drilling and logging while drilling. Errors come about if the total bottom hole assembly is not correctly measured or recorded.

5. Well logging - Wikipedia

   en.wikipedia.org/wiki/Well_logging

   Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole.The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs).

6. Bottom hole assembly - Wikipedia

   en.wikipedia.org/wiki/Bottom_hole_assembly

   Rotary assemblies [2] are commonly used where formations are predictable and the rig economics are an issue. In such an assembly the weight of the drill collars gives the BHA the tendency to sag or flex to the low side of the hole, collar stiffness length and stabiliser diameter and placement are engineered as a means of controlling the flex of the BHA.

7. The 3 Most Overpriced Cities in America, According to Gen Z ...

   www.aol.com/finance/3-most-overpriced-cities...

   The median home size in the area is 1,309 square feet. Homes sold for an average price of $947 per square foot. While fewer respondents (around 17%) viewed San Francisco as overpriced compared to ...