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2. Klein's line - Wikipedia

   en.wikipedia.org/wiki/Klein's_line

   Klein's line or the line of Klein is a virtual line that can be drawn on an X-ray of an adolescent's hip parallel to the anatomically upper edge of the femoral neck.It was the first tool to aid in the early diagnosis of a slipped capital femoral epiphysis (SCFE), which if treated late or left untreated leads to crippling arthritis, leg length discrepancy and lost range of motion.

3. List of components of oil drilling rigs - Wikipedia

   en.wikipedia.org/wiki/List_of_components_of_oil...

   Suction line (#3) is an intake line for the mud pump to draw drilling fluid from the mud tanks. Swivel (#18) is the top end of the kelly that allows the rotation of the drill string without twisting the block. Traveling block (#11) is the moving end of the block and tackle. Together, they give a significant mechanical advantage for lifting.

4. Trethowan's sign - Wikipedia

   en.wikipedia.org/wiki/Trethowan's_sign

   Trethowan's sign is when Klein's line does not intersect the lateral part of the superior femoral epiphysis on an AP radiograph of the pelvis. [1]

5. Drill bit (well) - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_(well)

   In the oil and gas industry, a drill bit is a tool designed to produce a generally cylindrical hole in the Earth’s crust by the rotary drilling method for the discovery and extraction of hydrocarbons such as crude oil and natural gas. This type of tool is alternately referred to as a rock bit, or simply a bit. The hole diameter produced by ...

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. Slipped capital femoral epiphysis - Wikipedia

   en.wikipedia.org/wiki/Slipped_capital_femoral...

   SCFE is a Salter-Harris type 1 fracture (fracture through the physis or growth plate) through the proximal femoral physis, which can be distinguished from other Salter-Harris type 1 fractures by identifying prior epiphysiolysis, an intact (in chronic SCFE) or partially torn (in acute SCFE) periosteum, and the displacement being slower. Stress ...