Abstract: A wellbore assembly includes a first tube and a second tube. The first tube is disposed within a wellbore and has a first end fixed with respect to a wall of the wellbore. The second tube is coupled to a second end of the first tube. The second tube has a third end opposite the coupling and fixed with respect to the wall of the wellbore. The first tube includes a portion of reduced or increased diameter residing between the first end and the second end. The portion of reduced or increased diameter defines an internal diameter that changes, with the first tube under a compression load, to decrease a length of the first tube. The internal diameter changes, with the first tube under a tensile load, to increase a length of the first tube to accommodate changes in length of the first tube or the second tube or both.

Abstract: A computer system receives data representing a hydrocarbon reservoir. The data includes a surface location, reservoir property data, mechanical property data, and offset well information of the hydrocarbon reservoir. The computer system generates a three-dimensional (3D) geomechanical model of the hydrocarbon reservoir based on the data. The 3D geomechanical model is for identifying a sweet spot in the hydrocarbon reservoir for drilling and stimulation, and placing a hydrocarbon well in the sweet spot. The computer system determines drilling parameters based on the 3D geomechanical model and the offset well information. The drilling parameters are to reduce an enlargement of a wellbore of the hydrocarbon well. The computer system monitors the drilling parameters until the hydrocarbon well reaches a particular depth from a surface of the Earth. The computer system performs a rigless operation on the hydrocarbon well.