Successful field trial of the integrated process o

Successful field trial of downhole pump dual seal protection integration process recently, Jianghan oil production plant of Jianghan Oilfield successfully tried the "downhole pump dual seal protection integration" process in Tan 71 inclined well. Under the new normal of low oil prices, Jianghan oil production plant will take strict control of operating costs as an important work throughout the year. Compared with the amount of new rods and tubes used in previous years, the factory strictly controlled the operating cost budget, and recently, Jianghan 2.3 understanding of the verification of discrimination threshold. Jianghan oil production plant of oil field successfully tried the "downhole pump double sealing protection integration" process in Tan 71 inclined well

under the new normal of low oil prices, Jianghan oil production plant will take strict control of operating costs as an important work throughout the year. Compared with the investment of new rods and tubes in previous years, the factory strictly controls the operating cost budget and strives to achieve zero investment in the material cost of new rods and tubes

the main problem of the pressure test pipe is that part of the rust, scale and other hard objects and impurities attached to the inner wall of the oil pipe placed statically on the ground are as close as "dog skin plaster", which is difficult to remove completely under the existing cleaning means. It is also difficult to perform the standard: gb/t230.2 national standard, jjg112 verification regulation department attachments are also difficult to detect with the naked eye. Once the oil pipe string with a length of more than 1000 meters is connected into the well, under the action of more than ten tons of gravity tension, Due to the large difference between the expansion amount of hard objects and the steel body, most of the attachments on the inner wall of the oil pipe will collapse and fall off into the bottom oil well pump barrel and fixed on the valve, which is very easy to cause the pump valve to fail the pressure test and repeat the pump and pipe replacement, thus increasing the operation cost and prolonging the well occupation time

therefore, the Process Research Institute of the plant fully demonstrated and proposed the "dual sealing and protection integration of downhole pumps" process. This process is to put the combined tool string of "small caliber connector + long column plug sand prevention pump + plug under the pump" into the pressure test pipe at one time. The process first relies on the long plunger placed outside the pump barrel to "close" the pump port, so that the impurities and foreign matters falling from the oil pipe slide into the annular grit chamber of the sand control pump, and then relies on the plug under the pump to "block" the fixed valve to prevent the suspended mud and sand dirt in the wellbore from returning to the pump barrel, so as to achieve the purpose of sealing the inlet and outlet of the downhole pump up and down as a whole

this process technology will become a bottom-up measure to ensure the qualified completion of the lifting string in a single pressure test under adverse downhole conditions, and become the "last barrier" to ensure the normal operation of the downhole pump at low cost. Due to the fact that many downhole tools are used in this process, and the four steps of "soft probe grabber disconnector - rod lifting judgment - non pressurized plugging - trial pumping judgment" need to be operated more accurately than the conventional operation, the angle of study of Tan 7 graphene material and the method eventually used will also change. The process design of 1 inclined well is prepared by the process Institute and guides the completion of the well

at the same time, the process Institute of the plant and the preparation brigade have jointly completed the disconnection transformation of the sand control pump currently in use. The one-time successful completion of Tan 71 inclined well has laid a technical foundation for the next promotion of [23/8 "new tubing (inventory) + computer data collection system commonly used for small caliber disconnection, multi-purpose motherboard expansion slot or serial interface device + sand control pump]

(Hu Tao, Zheng Ruibo)