Abstract: In certain embodiments, a method includes generating a set of average velocity controls based on received seismic data, generating a depth to basement model based on received potential fields data, and generating an average velocity model using an interpolation model to interpolate the set of average velocity controls and the depth to basement model. The method may also include generating a variogram model based on the set of average velocity controls, and generating the average velocity model using the interpolation model to interpolate the average velocity controls, the variogram model, and the depth to basement model. The interpolation model may be Kriging with external drift. The external drift may be based on the depth to basement model. Additionally, the method includes generating a structural map of a subsurface formation using the average velocity model.

Abstract: The various embodiments herein provide a mandrel assembly for tube bending. The mandrel assembly comprises a plurality of chains, a ring arranged between the plurality of chains links, a plurality of ball segments, a shank and a pin. The ring is placed between the set of chain links and the chain links are inserted into the one side of the ball segment and the other side of the ball segment is inserted with other set of chain links and the pin is held to hold the components firmly. The plurality of chains links are passed into a machined section of each of the plurality of ball segments and the pin is inserted into a groove of the ball segments to hold the plurality of chains and then connected to the shank thereby forming a mandrel joint.