| 主权项 |
1) A method of cleaning heavy material deposits from a wellbore in a hydrocarbon reservoir, said method comprising:
a) providing a hollow rod pumping system to a wellbore in a reservoir that has heavy material deposits, said heavy material including paraffin;
i) said hollow rod pumping system comprising an inner hollow rod having fluid inlet ports and a pump fluidly connected thereto,ii) said inner hollow rod being inside an outer casing, an annulus being between said casing and said inner hollow rod, b) pumping hot water at a first temperature through the annulus between the tubing and hollow rods at the beginning of a pump cycle;
i) said first temperature being hot enough to melt said heavy material deposits to produce hot water and melted heavy material; c) pumping said hot water and melted heavy material up and out of said annulus thereby completing the pump cycle; d) sending produced hot water and heavy material to a unit at a surface to remove said melted heavy material and leave remaining water; e) reheating said remaining water; f) recycling said reheating water in said hot water pumping step b; g) producing oil or gas from said reservoir subsequent to each pump cycle; h) repeating said pump cycle at regular intervals throughput a production lifespan of said reservoir. |
