RIASSUNTO
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Introduction
Development of the East Wilmington oil field began in July 1965, under the planning and supervision of the THUMS LONG BEACH COMPANY. After six years in operation, THUMS has at present 460 wells being produced by electrical submersible pumps and 55 wells being produced by subsurface hydraulic units with an average gross production of 280,000 plus B/D and an average net production of 124,000 B/D. plus B/D and an average net production of 124,000 B/D. Early in the development of the field, it became apparent that a production tool was badly needed that would allow producing downhole surveys to be taken with wireline equipment producing downhole surveys to be taken with wireline equipment when an electrical submersible pump was operating in the well. The tool would have to be run in conjunction with the pump and not effect the original function of the pump. Early in 1966 THUMS develop such a tool and has utilized it successfully. This tool is termed THUMS ""Y"" tool or THUMS crossover assembly and it now provides a means of acquiring any type static or producing survey with either an electrical submersible or producing survey with either an electrical submersible or hydraulic pump installed in the well. At present, THUMS has over 225 of these units installed and has completed over 75-100 successful surveys through them. This unique tool has proved invaluable to THUMS in finding and excluding excessive water of gas entry by undesirable subzone contributors, monitoring water movements, circulating wells, flowing wells, placing acid, and many other production functions.
""Y"" TOOL DESCRIPTION
The basic principle of the tool is to provide a piping arrangement whereby the pump is offset to allow a straight, smooth run for the survey tools to pass below.