![]() ![]() Connect a 4x4 grid of points with 6 continuous lines, ending where you started, and without crossing any point twice. Connect a 3x4 grid of points with 5 continuous lines, ending where you started, and without crossing any point twice. Let our drilling software assist you connect more dots. Its on the later part of that page a different connecting-dots problem is at the top. Connecting dots in drilling engineering reveals the trends of operation date and window of safety to operate. So you have to trust that the dots will somehow connect in your future.”Ĭonnecting dots in our lives gives us confidence to follow our hearts even when it leads us off the well worn path. Steve Jobs once said this in his famous commencement address to Stanford University: “You can’t connect the dots looking forward you can only connect them looking backwards. We call this powerful feature of automatic run on multiple cases “Sensitivity Study”. The following pictures show the impacts of open hole excess on top of cement (TOC) and hydrostatic pressure difference. This process is automated in many of our drilling software models. Try to connect nine equally spaced dots using four lines or fewer without lifting a pen This activity literally requires thinking outside of the box in. The location of the dots is as in the figure, where each number corresponds to a separate dot (the. If we can compile the output from multiple runs of computer model, we can see the trend. There are nine dots that need to be connected with 4 lines. Individual case study with one set of input data only tells one story. You can see from the dots (field measurements) and the lines (model prediction) that the friction factor of 0.32 is a good estimation for slack off operation. The following picture is a screen from TADPRO (torque and drag model). If we can observe hookloads or surface torque for certain operation at various depths, we can calibrate friction factor (back calculation). One of the uncertainties in torque and drag analysis for drilling is the friction factor, because it is dependent on many things such as mud type (oil-based or water-based), pipe moving in casing (steel) or in open hole (rock), cutting concentration, etc. Looking at dots, we obtain limited information, but more often, we miss the big picture if our vision is restricted to the dots only. ![]() Dots are isolated incidents, individual cases, snap shots, discrete numbers, etc. ![]()
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