A downhole automatic connection device and method for a pipe string built-in measurement and adjustment cable for intelligent layered water injection
A technology of layered water injection and automatic connection, which is applied to the parts of the connection device, the connection/disconnection of the connection device, and the device of the connection/disconnection of the connection parts, etc. The connection between the head and the female head is unstable, and the cable entry speed is slow, so as to achieve the effect of compact structure, guaranteed directionality and high connection efficiency
Active Publication Date: 2018-11-13
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
However, the running speed of the cable is slow, the connection efficiency is low, and the depth of the oil and gas well is very deep, so it is difficult to ensure the accurate docking of the male connector and the female connector
Even if the male head and the female head can be connected, the connection between the male head and the female head is not stable under the action of water pressure during water injection
Method used
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[0030] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:
[0031] Such as Figure 1~5 As shown, a downhole automatic connection device with built-in monitoring and adjustment cables for intelligent layered water injection, which includes a water injection string 1, a hydraulic anchor 2 sequentially connected to the lower end of the water injection string 1, and a cable packer 3 , an intelligent water distributor 4, a hydraulic support anchor 5 and a plug 6, the water injection column 1 is provided with a cable lowering mechanism, and the cable lowering mechanism includes a cable 7, a cable female joint 8, a motor 9 and a stressed blade 10, and the cable 7 There are communication cables, control cables and power cables inside. The cable 7 is connected to the ground monitoring and control equipment. The end of the cable 7 is covered with a shell 11. The cylind...
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The present invention discloses a downhole automatic connection device for an oil pipe internal communication cable for intelligent layered water injection. The connection device comprises a water injection pipe string in which a cable lowering mechanism is arranged. The cable lowering mechanism comprises a cable, a cable female connector, a motor and load-bearing blades. The cable female connector comprises a female connector shell, a jack insulating plate and an electromagnet. A cable male connector is also fixedly arranged in the water injection pipe string. The cable male connector comprises a male connector shell, a pin insulating plate and an NdFeB magnet. A pin wire welding point is electrically connected with a sensor on an intelligent water distributor. A lead arranged in the pin insulating plate is connected between a pin and the pin wire welding point. The present invention also discloses a connection method.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a downhole automatic connection device and method for a measurement and adjustment cable built in a pipe string for intelligent layered water injection. Background technique [0002] At present, with the gradual deepening of water injection development in oil and gas fields, layered water injection construction of water injection wells is becoming more and more frequent. The water distributor distributes water in layers, so that the water injection volume of the high-permeability layer is controlled, and the water injection volume of the medium-low permeability oil layer is strengthened, so as to ensure that all types of oil layers can play their roles. It is difficult to monitor and control the water injection flow rate and pressure of each water injection layer in real time on the ground during layered water injection. [0003] In order to solve the above proble...
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IPC IPC(8): H01R13/62H01R13/631H01R43/26E21B17/02
CPCE21B17/023H01R13/6205H01R13/631H01R43/26E21B17/028E21B43/20H01R13/6315
Inventor 李旺唐洋王国荣刘清友
Owner SOUTHWEST PETROLEUM UNIV