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This article mainly presents the method of carrying out Manchester’s coding, transmitting and surface decoding for the downhole data based on complex programming language device EPM1270T144I5 chip (CPLD). It also presents the main components of new intelligent layered water injection regulating and testing system, the overall scheme design on data transmission, and the software simulation in QuartusⅡ for ManchesterⅡ encoding as well decoding. The actual application shows that the technology features stable and reliable for data transmission and acceptance, thus it is greatly simplifying the system’s circuit, improving its whole performance.

The force of pump casing for triplex plunger was very complex, as well as the loads varied with the angle of crankshaft rotation. Using VB programming software obtained the load of pump casing anywhere, then 3D models of pump casing of triplex plunger pump have been created by utilizing Pro/E, and strength calculation of the pump casing was analyzed by utilizing Abaqus software in six different load conditions. The results indicated that the dangerous cross section and the stress distribution have been found and the maximum stress of the pump casing was 297.3 MPa, which was less than the limit of yielding strength but met the overall strength of pump casing. This research was significant for the reliability evaluation and the design improvement of the pump casing.