Development Of The Adjustable Blanking Plug Used In The Eccentric Layered Water Injection

The majority of Daqing Oil Field has entered the high watery development period, the injection way realization of layered controlled injection in the water-injection already became the important method to solve the contradiction between the oil field level, to maintain the stratum energy, to maintain long-term stable production, the high production, to enhance the recovery ratio of the oil field. The layered testing and adjusting combination water-distributing system which Daqing Oil Field is now developing wants to realize the function of"the pressure synchronously read, the flux real-time monitored, the tap continuously adjusted", achieved the goal of enhancement of test efficiency, reduction the time of testing and adjusting, enhancement of the rate of test material accuracy, the adjustable blanking plug is an important part in the system. It is important to develop a better adjustable blanking plug on the entire petroleum mining technology. To develop one kind of good performance adjustable blanking plug to the success development of the entire layered testing and adjusting combination water-distributing system and the enhancement of the level of the entire petroleum mining technology appears especially important.According to the actual situation, this article has established the motive-type and rotary-type two kinds of flow field models about easy to adjust and basic linear flux adjustable blanking plug, and has carried on the simulation computation using computational hydrodynamic software FLUENT, has carried on the confirmation from the theory angle to some experience optimized parameters, and has obtained the stress curve of the motive-type adjustable blanking plug's valve core received and the torque curve of the rotary-type adjustable blanking plug received, to provide later theory analysis'datum for motor which used in the layered testing and adjusting combination water-distributing system and self-locking function's examination computation after measured and so on. It has studied the correlation theories about eroding wears, compared the adjustable blanking plugs this article developed and"double kidney-shaped"adjustable blanking plug now Daqing widely used, discovered the adjustable blanking plug this article developed have stronger anti-attacks ability and long life compared to the present used one.According to the FLUENT simulation computational result, carried on concrete development to the motive-type adjustable blanking plug and the rotary-type adjustable blanking plug, analyzed primarily the seal capability of the motive-type adjustable blanking plug, the self-locking capability after testing of the rotary-type adjustable blanking plug and their mechanical capability. It has analyzed the motor used in the layered testing and adjusting combination water-distributing system, used it to satisfy completely the adjustment of the adjustable blanking plug.At last this article has separately carried on the indoor drift experiment and the scene experiment to the motive-type and rotary-type adjustable blanking plugs this article developed, in which compared two kinds of adjustable blanking plugs. The indoor drift experiment confirmed two kinds of blanking plugs developed have good seal and self-locking performance. The scene experiment confirmed two kinds of adjustable blanking plugs developed are easy to adjust, and not easy to jam in the testing and adjusting process, and could reduce greatly the testing and adjusting time, moreover the obtained testing and adjusting curve can mate basically with the FLUENT analysis result. It compared the actual daily water-injection rate to the needed daily water-injection rate, and indicated its error is quite small, this had indicated develops the adjustable blanking plugs this article performed have good performance, and satisfied the operation demands completely.