Sand fishing pipe column and sand fishing working method thereof

Abstract

The invention discloses a sand fishing pipe column and a sand fishing working method thereof used in the petroleum industry. The pipe column comprises a suction pump, drill rods and a sand washing penpoint. The suction pump is connected with a rotational flow pipe, a sand settling pipe and the sand washing pen point sequentially from top to bottom through the drill rods, wherein a sand settling cavity is formed in the sand settling pipe, a rotational flow channel is formed in the rotational flow pipe, and at least one sand settling pipe is connected in the sand fishing pipe column. After thesand washing pen point in the sand fishing pipe column makes contact with the sand face, a pump is started on the ground to conduct direct cycle sand washing, at the moment the put-in drill rods beginto be counted, when the size of the drill rods put into washed sand is matched with the volume of the sand settling cavity / cavities in one or more sand settling pipes connected in the sand fishing pipe column, the pump is stopped on the ground, and sand is settled. The sand washing quantity of a sand washing well section can be calculated according to the depth of the sand washing well section, and thus the sand settling quantity of the sand settling pipe connected in the sand fishing pipe column is equal to the sand washing quantity of the sand washing well section. The sand cleaning effectis improved significantly, the construction period is shortened, the purpose of effective sand washing is achieved, and working cost is lowered effectively.

Description

technical field [0001] The invention relates to a sand dredging device and method for workover operations in the petroleum industry, in particular to a sand dredging pipe string and a sand dredged operation method thereof. Background technique [0002] In oil industry workover operations, sand production in oil wells is a common phenomenon and an important factor affecting the continued production of oil wells due to formation reasons or production reasons. Therefore, sand cleaning and sand removal in oil well operations is very common in workover operations. A form and means of work. In order to effectively carry out sand removal and sand removal operations in oil wells, many methods are currently used, but these methods have disadvantages. The disadvantages of various sand removal and sand removal methods are described in detail below: (1) Positive sand washing of light oil pipe: this kind The sand washing method has the disadvantages of high sand washing efficiency and p...

AI Technical Summary

Problems solved by technology

In order to effectively carry out sand removal and sand removal operations in oil wells, many methods are currently used, but these methods have disadvantages. The disadvantages of various sand removal and sand removal methods are described in detail below: (1) Positive sand washing of light oil pipe: this kind The sand washing method has the disadvantages of high sand washing efficiency and poor sand carrying ability

(2) Recoiling sand with light oil pipe: This method has the disadvantages of strong sand carrying ability and weak sand washing ability

(3) Using Venturi salvage baskets to clear sand and remove sand has the disadvantages of strong adsorption capacity and small amount of salvage, and the pump cannot be stopped midway for salvage

(4) Partial reverse circulation salvage basket can clear and remove sand, but has the disadvantage of less sand removal

[0003] The above sand cleaning and sand removal methods have certain disadvantages. In the sand removal and sand removal of ultra-deep wells, due to the depth of the well, the power requirements of the pump power equipment are particularly high: It is still recoil sand. When the sand and gravel particles washed up in the well are large, the sand and gravel in the well cannot be effectively picked up due to sedimentation.

However, when using Venturi fishing baskets, partial reverse circulation fishing baskets, and wire rope sand cleaning and sand removal, there is a common problem of low sand removal efficiency. Therefore, all the above methods have the problem of not being able to efficiently remove sand, and they all have sand removal efficiency. Low, time-consuming and labor-intensive disadvantages reduce the efficiency of workover construction, which is not conducive to efficient operation and increases the cost of workover

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