Research And Application Of Circulation Heating By Double Hollow Rod In Heavy Oil

Heavy oil, oil well borehole viscosity reduction lift the hollow rod mixed with water to h eat up, chemical viscosity, electrical heating of hollow rod, but there are some defects in the fi eld application.The hollow rod watered heat carrier circulating oil production in heavy oil recovery has been successfully applied. However, the doped hot water mixed with crude oil, is a continuou s need to add hot water, low thermal efficiency. In addition, the use of a block of multi-well, o ften need to build the pipeline network, high costs of operation and management. In addition,increasing the difficulty and expense of post-dehydration treatment, and there is the wellhead measurement issues.Chemical viscosity reducer before starting the research inputs, high labor costs, the visco sity reduction lifting effect is not ideal.The hollow rod electric heating technology is the cable wire installed within the hollow r od, the end of the hollow rod connected to the lever wall, hollow rod itself as a loop, the use o f hollow rod metal skin effect heat. Simple construction operations, the management is relativ ely convenient, more heavy oil, condensate wells. Excessive power consumption, high operati ng costs; Moreover, energy efficient use, electric heating is not an economical way of heating,electric heating rod according to the present power and current, when the electric heating po wer in the 90 Kw general day consumption power 700-1000 kWh, while the application of the general power consumption up to about 2000 kWh power up to 150 kW electric heating rod in the super heavy oil blocks. This high energy-consuming equipment is not only greatly increas e the production inputs, does not conform to the requirements of the national energy saving, it is necessary to develop a new viscosity reduction alternative electric heating oil extraction m ethod.The hollow rod closed loop heating technology is a new, reliable viscosity reduction proc ess. The Development Center of Shengli Oilfield Applications is taken as an example in this p aper. First of all, the basic principles of the process is introduced, followed by analysis of suc ker rod load, the last of the technology in the field application of effects and economic costs are analyzed.