Based on the model of the non-uniform load, the paper researched the collapsing strength of the slotted casing with N80 steel and established 3D finite element model by adopting the finite element method.

petroleum slotted pipe is a tool for sand prevention in the petroleum production of oil field.

The slotted pipe with narrow slots can be mass worked economically and efficiently by means of open loop system and hand automatic model shifter.

The slottings\' distribution on the slotted pipe has an important influence on distribution of stress.

Regarding the slotted liner destruction caused under non-uniform loads, the effects of non-uniform loads on the collapse strength of slotted liner is studied, the mechanical model for slotted liner is set up, and the collapse strengths under different loads and the variations of the collapse strengths of the slotted liners with different thicknesses as non-uniformity changes are analyzed.

According to the properties of Pinghu oilfield in East China Sea, the well completion method of A3 horizontal well is determined as initial well completion by slotted liner and later sand control by metal fibre screen pipe.

Research on slotted screen for anticorrosion and antiscale in oil/water wells

A new completion well method is applied in Lin4 ping2 horizontal well at first time,the method is make up of slotted screen with external casing packer.

With the laser cutting machines and the principle of slotted screen laser cutting, the compound shifting position method and special technologys cheme are adopted to solve the technological difficult problems of compound shifting position methodtrapezoid-slit and broad-slit processing.