4 results about "Drill stem test" patented technology

The invention discloses a fatigue testing machine for testing the performance of a petroleum drill rod, and relates to the technical field of drill rod testing. Comprising a bottom frame, a first hydraulic push rod is installed on the bottom frame, a strain sensor is installed on the bottom frame, the bottom frame is in sliding connection with a sliding block, a first motor is installed on the sliding block, and a first clamp is installed on an output shaft of the first motor; the supporting ring is rotationally connected to the bottom frame, the supporting ring is provided with a second clamp, and the second clamp is fixedly connected with a rotating shell; the fixed shell is rotationally connected to the rotating shell, and the space between the rotating shell and the fixed shell is filled with a damping medium; and the blocking piece is fixedly connected in the rotating shell. Damping is applied to the blocking piece through the damping medium, so that the drill rod is subjected to dynamic torque, the motion load-bearing state of the drill rod in the stratum in the actual working process is simulated, and the problem that due to the fact that a conventional testing machine can only conduct a static load-bearing test on the drill rod, the representativeness of data obtained through the test is poor is avoided.

The present invention discloses a fatigue testing machine for testing the performance of oil drill pipes, and relates to the technical field of drill pipe testing. The present invention comprises: a base frame, the base frame is equipped with a first hydraulic push rod, the base frame is equipped with a strain sensor, the base frame is slidably connected with a sliding block, the sliding block is equipped with a first motor, and the output shaft of the first motor is equipped with a first clamp; a support ring, rotatably connected to the base frame, the support ring is equipped with a second clamp, and the second clamp is fixedly connected with a rotating shell; a fixed shell, rotatably connected to the rotating shell, and a damping medium is filled between the rotating shell and the fixed shell; an obstruction member, which is fixedly connected in the rotating shell. The present invention applies damping to the obstruction member through the damping medium, so that the drill pipe is subjected to dynamic torque, so as to simulate the motion loading state of the drill pipe in the formation during the actual working process, and avoid the conventional testing machine can only perform static load test on the drill pipe, resulting in poor representativeness of the test data.

A method of constructing a mechanical earth model (MEM) includes integrating a density logging data set to compute vertical stress and applying correlation models or equations to estimate a pore pressure and mechanical properties. The method also includes calibrating the pore pressure with drill stem test data, calibrating the mechanical properties with laboratory tests on core plugs or on rock cuttings, estimating a minimum horizontal stress using correlation models, and calibrating the minimum horizontal stress with minifrac tests. The method further includes estimating a maximum horizontal stress using the correlation models while assuming one or more correlation parameters, calibrating the maximum horizontal stress with a global pattern of tectonic strains and a basin stress regime, evaluating one or more breakout regions using the MEM, a trajectory of a well, and a geometry of a pilot hole, and comparing the one or more breakout regions and a caliper logging data set.

Systems and methods presented herein include an assembly of tools that can be arranged in a wellbore in such a way that allows a combination of formation testing (e.g., with a modular formation dynamics testing tool, a wireline formation testing tool, and so forth) and drill stem testing (DST). The assembly of tools enables performance of both types of activities potentially in a single run in the hole, and facilitate full control of the reservoir and formation fluids or, in case of injection, of injected fluids inside the tubing or drill pipe. In addition, the assembly of tools allows for multiple set points to perform zonal evaluations with the formation testing tools, and facilitate performance of full scale flow tests with the DST string.