A self-expanding sealer

Abstract

The invention discloses a self-expansion clamping packer. The self-expansion clamping packer comprises a central pipe, an upper fixing band, a self-expansion rubber sleeve, a lower fixing band and a valve band. A coupling is mounted at the top end of the central pipe, the outer surface of the middle of the central pipe is wrapped with a glass fiber heat insulation layer, the outer side of the glass fiber heat insulation layer is connected with the self-expansion rubber sleeve in a sleeved mode, the self-expansion rubber sleeve is made of a composite material synthesized by adopting fluororubber and fluorinated silicone rubber, and hydrophilic and water absorption gene molecules are guided in the self-expansion rubber sleeve by utilizing a chemical branch method and a physical blending method. According to the self-expansion clamping packer, due to the self-expansion rubber sleeve is made of the composite material synthesized by adopting the fluororubber and the fluorinated silicone rubber, rubber hydrophilic groups can absorb a large amount of oil and water molecules to the limitation of expansion by utilizing the osmotic pressure generated by the concentration difference of relevant components in a rubber molecular chain, water absorption balance is reached, and due to the fact that the groups have excellent water retention capacity, it is ensured that the water molecules cannot be separated out from rubber, accordingly the characteristic that rubber expands in water and oil is achieved, and the function of packing is achieved.

Description

technical field [0001] The invention relates to the technical field of auxiliary tools for oilfield development, in particular to a self-expanding sealer. Background technique [0002] As a main stratification tool downhole, packer plays an important role in stratification production of oil and gas wells. Traditional packers include support type, slip type, leather cup type, hydraulic expansion type, suspension type and other eight series and multiple types. Traditional packers rely on external force and operate the mechanical structure to set the packer , but this type of packer is prone to sand sticking, early setting and other phenomena when going downhole, with high risk and poor reliability. Contents of the invention [0003] The purpose of the present invention is to provide a self-expanding sealer to solve the problems raised in the above-mentioned background technology. [0004] In order to achieve the above object, the present invention provides the following te...

AI Technical Summary

Problems solved by technology

Traditional packers include support type, slip type, leather cup type, hydraulic expansion type, suspension type and other eight series and multiple types. Traditional packers rely on external force to operate the mechanical structure to set the packer , but this type of packer is prone to sand sticking, early setting and other phenomena when it goes downhole, with high risk and poor reliability

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