Abstract: A piston pressure device includes a gas concentration-regulating piston pressure device and a high temperature autoclave. In the gas concentration-regulating piston pressure device, the proportion and concentration of corrosive gases can be accurately adjusted, intermediate gases can be stored and filled into the high temperature autoclave according to experimental needs, and an actual corrosion process in oilfield is accurately simulated. Meanwhile, the corrosive gases can be supplemented in real time during the experiment, and dynamic gas distribution in a high-temperature high-pressure corrosion experiment process is realized.

Abstract: A rotary fatigue tester with complex loads includes a pump, a first motor, a second motor, a circulatory loop, an experimental kettle body, and a holding device. The experimental kettle body is a cylindrical tank, the circulatory loop is located on the experimental kettle body, a pump is located within the circulatory loop and is connected with a corrosive gas pipeline; the holding device is located within the experimental kettle body for fixing a test piece, a force-bearing pole is located at one side of the experimental kettle body for applying a shear force to the test piece, the holding device and the force-bearing pole are connected with the first motor and the second motor respectively. The rotary fatigue tester is able to simultaneously apply the axial alternating load and tangential alternating load to the test piece, for simulating the force of the test piece under complex loads.

Abstract: A piston pressure device includes a gas concentration-regulating piston pressure device and a high temperature autoclave. In the gas concentration-regulating piston pressure device, the proportion and concentration of corrosive gases can be accurately adjusted, intermediate gases can be stored and filled into the high temperature autoclave according to experimental needs, and an actual corrosion process in oilfield is accurately simulated. Meanwhile, the corrosive gases can be supplemented in real time during the experiment, and dynamic gas distribution in a high-temperature high-pressure corrosion experiment process is realized.

Abstract: A rotary fatigue tester with complex loads includes a pump, a first motor, a second motor, a circulatory loop, an experimental kettle body, and a holding device. The experimental kettle body is a cylindrical tank, the circulatory loop is located on the experimental kettle body, a pump is located within the circulatory loop and is connected with a corrosive gas pipeline; the holding device is located within the experimental kettle body for fixing a test piece, a force-bearing pole is located at one side of the experimental kettle body for applying a shear force to the test piece, the holding device and the force-bearing pole are connected with the first motor and the second motor respectively. The rotary fatigue tester is able to simultaneously apply the axial alternating load and tangential alternating load to the test piece, for simulating the force of the test piece under complex loads.

Abstract: Certain aspects of the invention are generally directed to particles comprising a shell and an interior at least partially contained by the shell. In some embodiments, the particles may be treated to enhance the containment of the interior, for example to reduce transport of an agent into or out of the interior. Such particles may exhibit increased ability to encapsulate agents and/or increased storage life (e.g., due to reduced leakage). For instance, in certain embodiments, any defects, such as cracks, pores, etc. within the shell may be sealed or otherwise treated to reduce transport therethrough. In some embodiments, for instance, a first reactant in the interior of a particle may come into contact with a second reactant outside of the particle to form a solid, or other suitable product. The shell may also be treated to cause release of an agent contained within the interior, in certain aspects.