Sand control pipe for oil-sand separation in oil and gas exploitation

Abstract

The invention provides a sand control pipe for oil-sand separation in oil and gas exploitation. A sand control sleeve is fixed on a base pipe, seepage holes are evenly distributed on the base pipe, and an inner protective cover, a filter layer and an outer protective cover are welded together sequentially from the inside to the outside to form the sand control sleeve; the inner and the outer protective covers are respectively provided with a plurality of through holes; and the filter screen of the filter layer is made of one to four layers of foamed nickel or foamed nickel alloy. The sand control pipe has the advantages of good sand control effect, simple structure and technique, longer service life and low cost, and can effectively control sand in an oil well for a long time.

Description

technical field [0001] The invention relates to a device for separating liquid-solid two phases, in particular to a sand control pipe used for oil sand separation in oil and gas exploitation. Background technique [0002] During the development of oil and gas wells, formation sand will enter the wellbore with the flow of oil and gas, resulting in complex situations such as wellbore pump jamming and sand burial, affecting the normal production of oil and gas wells. Sand control screen is a mechanical filtering tool used to prevent formation sand from entering the wellbore and control formation sand production. At present, the screens used for mechanical sand control mainly include: pre-filled screens, wire-wrapped screens, metal fiber spun sand screens, slotted screens, etc. These screens either have a high cost, or have a short sand control time, or are easily damaged, or have an unsatisfactory sand control effect. The quality and life of the sand control screen have a dir...

AI Technical Summary

Problems solved by technology

These screens are either expensive, or have a short sand control time, or are easily damaged, or have unsatisfactory sand control effects.

The quality and life of the sand control screen have a direct impact on the production and life of the oil and gas well. Once the sand control fails, it will affect the normal production of the oil and gas well, and even lead to the scrapping of the oil well.

Moreover, the filter materials used in these screens are almost all sintered and planar stainless steel metal meshes with several layers. Moreover, the clay attached to the mesh is not easy to flow out with the liquid, resulting in a sharp drop in the permeability of the system, which is less than 40%.

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