Expansion expanding and sealing rubber sleeve
A technology of rubber sleeve and expansion seal, which is applied in sealing/package, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as shoulder rupture and separation, poor pressure resistance, rubber sleeve expansion and rupture, etc.
Inactive Publication Date: 2014-01-29
WEIHAI FENGTAI NEW MATERIAL SCI & TECH
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Problems solved by technology
At present, the quality problems of pre-expansion and expansion sealing rubber tubes mainly include: 1. Poor pressure resistance, and the rubber tube is prone to expansion and rupture; Cracking and separation; 3. The metal connectors at both ends of the rubber tube are not strong enough, and the metal connectors are prone to fall off when they are expanded under pressure
Method used
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[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0011] as attached figure 1 As shown, the pre-expansion expansion seal rubber cylinder includes a cylindrical rubber cylinder 1 and a metal connector 2 that is vulcanized and fixed at both ends of the rubber cylinder and the rubber cylinder. The rubber cylinder body on the surface of the left and right metal connectors forms the left and right shoulders of the rubber cylinder Part 3.
[0012] as attached figure 1 As shown, the rubber cartridge 1 is composed of a primer layer 4, a first axial harness layer 5, a second axial harness layer 6, and a rubber layer 7, and a radial harness layer 8 is compounded in the rubber layers on the left and right shoulders. .
[0013] as attached figure 1 As shown, the metal connector 2 is provided with a barb 9 at one end inside the rubber cartridge.
[0014] The specific manufacturing method of this pre-expansion ...
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The invention relates to an expansion expanding and sealing rubber sleeve used during oil-gas field well drilling and oil-production well completion. The expansion expanding and sealing rubber sleeve is more reasonable in structure, relatively simple to manufacture and high in pressure-resistant properties, and can solve the problems of tearing of shoulder portions and falling of metal connectors. The expansion expanding and sealing rubber sleeve comprises a cylindrical rubber sleeve body, a left metal connector and a right connector, the left and right connectors are arranged at two ends of the rubber sleeve body and integrally formed with the rubber sleeve body by means of sulfuration, and the rubber sleeve body on the surfaces of the left and right metal connectors form a left shoulder portion and a right shoulder portion of the rubber sleeve. The expansion expanding and sealing rubber sleeve is characterized in that the rubber sleeve body is composed of a primer layer, a first axial harness layer, a second axial harness layer and a rubber layer; radial harness layers are composited in the rubber layer of the left and right shoulder portions; and a barb is arranged at one end, located inside the rubber sleeve, of each metal connector. The expansion expanding and sealing rubber sleeve is in metal connection, consists of a polymer framework layer and high-strength rubber, and has the advantages of good sealing performance, high pressure resistance, variable angles, high reliability, low cost and the like.
Description
technical field [0001] The invention relates to a pre-expansion sealing rubber cylinder used in oil and gas field drilling and completion of oil production. Background technique [0002] In oil and gas field drilling and completion of oil production, the staged cementing process without inner pipe and plug-free is the most widely used advanced process at present. In this process, the pre-expansion sealing rubber cylinder is the key equipment that directly affects the success of the process. . The currently used pre-expansion expansion seal rubber cylinder is made of rubber vulcanization. As disclosed in ZL2004200707828, the steel cord self-expanding oilfield packer rubber cylinder has a steel pipe head with external threads at both ends of the cylindrical packer rubber cylinder, and one end of the pipe head is connected to the packer rubber cylinder through The vulcanization process is connected together, and there are one to two layers of steel cords inside the packe...
Claims
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Patent Timeline
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Inventor 钱国峰刘海庆
Owner WEIHAI FENGTAI NEW MATERIAL SCI & TECH