Long rubber barrel packer for oil field water exclusion production

Abstract

The invention discloses a long rubber barrel packer for oil field water exclusion production. The long rubber barrel packer at least comprises a central pipe, wherein the upper end of the central pipe is connected with an upper connector and the lower end of the central pipe is connected with a lower connector; a connecting sleeve, a connector, a spring seat sleeve, a middle rubber barrel assembly and a sliding sleeve sleeves the central pipe in sequence from top to bottom; the upper end of the connecting sleeve is connected with the upper connector and the lower end of the connecting sleeve is connected with the upper end of the connector; the inner circular surface of the lower end of the connector is connected with a piston switch; the outer circular surface of the lower end of the connector is connected with the upper end of the spring seat sleeve; the lower end of the spring seat sleeve is connected with the upper end of the middle rubber barrel assembly; the lower end of the middle rubber barrel assembly is connected with a sliding sleeve; the lower connector is internally provided with a positioning step; the positioning step is fixedly provided with a ball seat through an unpacking shear pin; the packer is combined with an oil field rod type oil pump oil production technology, and seat packing and production can be realized through a one-trip string; meanwhile, unpacking fishing can be carried out by lifting a pipe column and an expansion type packer is applied to the water exclusion production for the first time; the long rubber barrel packer has a longer effective packing surface and the packing success rate is improved.

Description

technical field [0001] The invention relates to a process device for oil recovery in an oil field, in particular to a process device for isolation of an oil well in which an oil layer and a water layer are connected due to casing damage, corrosion and perforation. Specifically, it is an oil field isolation packer using a long rubber tube. Background technique [0002] With the continuation of oilfield development time, downhole casings have successively broken due to corrosion and other reasons, resulting in the formation and oil layer connection, affecting the normal development of the oilfield and even polluting the formation water source and damaging the environment. So far, CNPC has accumulated more than 20,000 sets of broken wells . The commonly used techniques for casing broken wells include casing subsidy, chemical plugging, secondary cementing, and packer isolation. More than 80%. At present, there are two main types of packers used for mining isolation. One is the...

AI Technical Summary

Problems solved by technology

At present, there are two main types of packers used for mining isolation. One is the traditional Y111, Y211, Y341 and other conventional mining isolation packers. The sealing elements are compression-type setting seals with short compression stroke and small compression ratio. The effect is poor; the second is Y141, Y453, Y445 and other long-life isolation packers. This kind of packer needs to be equipped with special setting tools to be lowered first for setting, and then lowered into the oil production string with intubation for docking. In normal production, special tools are used for drilling and grinding when it needs to be pulled out. The construction process is complicated and the cost is high

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