Ball valve type oil reservoir protective valve and operation method thereof

Abstract

The invention relates to a ball valve type oil reservoir protective valve. The valve is characterized by comprising an upper movable tubular column module, a salvage releasing module, a ball valve stirring module, a connecting pipe, a ball sleeve, a lower spacing ring and a ball valve module, wherein the upper movable tubular column module is connected with the salvage releasing module; the lower part of the upper movable tubular column module is connected with the ball valve stirring module; the ball sleeve is arranged in the ball valve stirring module, and is provided with the ball valve module; and the lower spacing ring is sleeved on the lower part of the ball sleeve. The ball valve type oil reservoir protective valve has the advantages that a switch of the oil reservoir protective valve can be controlled only by lifting or releasing the production tubular column which is connected with the upper movable tubular column module without removing the protective valve in a well workover operation, so that both oil well leakage and oil well blowout can be prevented, and the oil reservoir and ocean environment can be protected.

Description

technical field [0001] The invention belongs to the technical field of oil field development and production, and in particular relates to a ball valve type oil layer protection valve and an operating method thereof. Background technique [0002] In the current known oilfield development, in order to ensure downhole safety during production, and to prevent overflow during the production string, it is necessary to continuously inject completion fluid into the wellbore to prevent leakage into the reservoir. Fluids will not only pollute the reservoir, but also increase the cost of well completion. If the completion fluid injection is not timely, it may also lead to overflow or even blowout. Therefore, in order to protect the oil layer from being polluted during the exploitation process and the marine environment from being polluted, it is necessary to apply the oil layer protection valve on the production well. [0003] At present, two types of oil layer protection valves, th...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two types of oil layer protection valves, the ordinary valve plate type and the sliding sleeve type, in offshore oil and gas wells. However, the ordinary valve plate type oil layer protection valve has potential safety hazards in downhole operations, and the sliding sleeve type oil layer protection valve is complicated to operate and requires additional steel wire operations. In contrast, the above problems have not been resolved, so there is no oil layer protection valve with more perfect functions and operations, which can prevent both leakage and blowout

Images