Packer soluble expansion type outer rubber cylinder and preparation method thereof
A soluble packer technology, applied in sealing/packing, earthwork drilling, wellbore/well components, etc., can solve problems such as shedding, residual well bottom, outer rubber tube distortion, etc., achieving low cost and simple process Effect
Pending Publication Date: 2018-07-24
雅安万利橡塑密封技术有限责任公司
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects of the prior art, to provide a packer soluble expandable outer rubber cartridge and its preparation method, the preparation process is simple, the manufactured outer rubber cartridge has excellent performance, and solves the difficulty of unsealing the packer , especially due to the defects of traditional rubber tubes, the outer rubber tube twists, falls off, gets stuck and remains at the bottom of the well
Method used
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[0023] In order to make the purpose of the present invention and the advantages of the technical solution more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.
[0024] as attached figure 1 As described above, a packer dissolvable expandable outer rubber cartridge is hollow cylindrical as a whole, including a cylindrical skeleton formed by a support body 1 and a cylindrical skeleton bonded to the outer periphery of the cylindrical skeleton through injection molding or winding into a tank forming process. The adhesive layer 2 is also sprayed with an adhesive layer 3 on the surface of the supporting body, and the adhesive layer is made of soluble materials.
[0025] Further, the adhesive layer 2 can be dissolved from a solid state to a 3-5mm fine particle or a liquid state.
[0026] Further, the supporting body 1 is a metal spring sheet, a spiral steel belt or a spiral steel wire.
[0027] Furthe...
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Abstract
The invention discloses a packer soluble expansion type outer rubber cylinder which is characterized in that: an injection-compression moulding or winding in-pot moulding technology is adopted, and the whole is of a hollow cylinder shape; the packer soluble expansion type outer rubber cylinder comprises a cylindrical skeleton formed by a support body and a rubber layer pasted on the periphery of the cylindrical skeleton; a sticking layer is also sprayed on the surface of the support body; the rubber layer is dissolved from solid state into tiny particles or liquid state. The invention providesa packer soluble expansion type outer rubber cylinder and a preparation method thereof. The preparation technology is simple; the prepared outer rubber cylinder has excellent performance; the difficulties in unblocking the packer and particularly the problems of distortion of outer rubber cylinder, drop, pipe blocking and residue at shaft bottom caused by the defects of traditional rubber cylinder are solved.
Description
technical field [0001] The invention relates to a packer for downhole application in oil fields, in particular to a soluble expandable outer rubber sleeve for the packer and a preparation method thereof. Background technique [0002] The expandable packer is composed of an inner rubber sleeve, a support body, a rubber sleeve joint and an outer rubber sleeve. Due to the continuous improvement of construction requirements in the construction site, coupled with the complex environment of the well and ground construction, the outer rubber tube is easy to twist, fall off and get stuck, often resulting in failure or slowness in unsealing, or difficulty in lifting the downhole string. Encountering resistance caused the construction party to overhaul, which not only affected the production of the oil field, but also increased a lot of construction costs. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art, to provide...
Claims
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IPC IPC(8): E21B33/127B29C35/02
CPCE21B33/1277B29C35/002B29C35/02
Inventor 李文楷
Owner 雅安万利橡塑密封技术有限责任公司