Electric packer, electric packer control method and electric packer utilization method

Abstract

The invention discloses an electric packer. The electric packer comprises a shell, a control mechanism, an execution mechanism, a limiting mechanism, a setting mechanism and a lifting unsetting mechanism. The shell is formed by connection of a lower joint, a lower shell, a mounting seat and an upper shell; the control mechanism is arranged in the shell; the execution mechanism which is arranged in the shell is an execution motor connected with a circuit board; the limiting mechanism is arranged in the shell and connected with the execution mechanism; the setting mechanism is arranged in the shell and connected with the limiting mechanism; the lifting unsetting mechanism is arranged in the shell and connected with the setting mechanism. The electric packer has the advantages that setting and unsetting can be realized at any time, and reusability is achieved; the problem of damages of underground equipment due to impurities such as sand and the like is effectively solved; by adoption of a thread transmission and hydraulic transmission integrated transmission manner and a low-voltage motor, high control precision and high circuit stability are realized; by the aid of the lifting unsetting mechanism, smoothness in pullout of pipe columns can be guaranteed when electric unsetting fails; owing to addition of the limiting mechanism, reliability is guaranteed.

Description

technical field [0001] The invention relates to the field of oil field technology, in particular to an electric packer, a control method and a use method thereof. Background technique [0002] The existing packer can only be set once, and the packer can only be unsealed after it is set up from the downhole. Since it is destructive unseal, it cannot be used again after unsealed. The existing flushable packer is provided with a well flushing channel, and the well flushing channel is opened in the setting state to realize the communication between the upper and lower chambers of the packer and realize the well flushing function. However, during the well flushing process, sand particles and other impurities in the well will enter the pipe string with the well flushing fluid, causing damage to the oil well pump, packer, safety net and other equipment, resulting in pump jamming, well flushing channels that cannot be closed and safety hazards. Valve leakage and other consequences....

AI Technical Summary

Problems solved by technology

This kind of packer uses a high-power motor to drive the screw transmission mechanism to prop up the rubber tube from the inside of the rubber tube, so that the packer is set. The disadvantages of this packer are: (1) In order to ensure sufficient setting pressure , the power supply voltage of 300V-400V is used to supply power to the downhole motor. It is not easy to guarantee the stability of this voltage range when the deep well is powered. Even if the insulation requirements are met, the manufacturing cost will be greatly increased; (2) directly to large The power is controlled by clicking, and the control accuracy is difficult to guarantee the stability of the action; (3) There is no forced unsealing mechanism. If the control circuit fails, when sand burial occurs or there are too many oil layers, the lifting resistance is too large. , it is still difficult to pull out the pipe string by destroying the rubber tube. In this case, if you want to pull out the pipe string, you need to greatly increase the operating cost and cause unnecessary losses; (4) You can only judge by the magnitude of the current Whether the setting or unsealing is in place, once the current is abnormal, it will not be possible to judge the expansion state of the rubber tube, and it will also be impossible to grasp the downhole state. At the same time, uncontrolled movements can easily cause overload of the motor and damage the mechanical structure. fracture failure

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