Hydraulic packer constructed in glass-fiber reinforced epoxi and stainless steel

(1) Field of the Invention

This model consists of a Hydraulic Packer constructed in glass-fiber reinforced epoxy and stainless steel.

In order to get a better understanding of this invention so that it can be put into practice with easiness, a detailed description will be given in the following paragraphs about the best way to carry out the invention, making reference in the description to the attached drawings, the whole with character of purely demonstrative example but not restrictive to the invention. Its components can be selected among several equivalents without leaving aside the principles of the invention established in this documentation.

(2) Prior Art

The inventor knows several achievements which are analyzed hereinafter.

As a consequence of this, patent GB2287734 has been localized, which consists in Seals which have non-metallic springs. One or more springs 22 are contained in an elastomeric body 10 used as a seal between telescopic components such as water well 14 and cover 16. The springs 22 are ordered annularly in the body which is made of a non metallic material (for example engineering plastics, composed of graphite or glass fiber, “KEVLAR” (RTM) o PEEK, able to be strongly connected to the body 10 and softer than the seal surfaces of the component 14 and 16 to avoid risk of scratching or damage from springs 22 to a part of body 10. Electrolytic corrosion risk is also avoided.

Patent US2003000710 is also localized, which consists of a resin impregnated Plug of the continuous fiber with non metallic elements.

A system of non metallic elements is provided which can seal or close efficiently an annular piece under high temperatures.

The system can also resist high differential pressures without sacrificing operation or suffering a mechanical degradation and it is considerably faster than drilling upwards as in a conventional system. In another aspect, the material composed covers a mixture of reinforced epoxi resin with layers of glass fiber superimposed about 30 to nearly 70 degrees. A tool such as a bridge plug or a packer is also provided. The tool comprises a first and a second helping ring that has one or more sharpened wedge, first and second ring of the extension, and a sealing member disposed between the rings of the extension and the helping rings.

Patent US2003226668 is also studied, and consists of a System that anchors or seals for a drilling tool. This invention is generally related to a method and a device to seal an annular piece in a well. In one aspect, the device is a system that anchors and seals for a drilling tool such as a bridge plug, packer. The sealing system comprises a component of the same disposed between a ring system, an expansion ring system adjacent to each cone, a helping ring system and a slider system. The sealing system components are adjusted in such a manner that when they are comprised, the sealing member can be expanded in a radial way in contact with a cover.

Finally, Patent U.S. Pat. No. 5,327,962 is studied, and consists of a Packer.

An inflatable packer which includes several annular layers of material, which consists of a series of oriented fibers encapsulated in an elastomeric resin, the inner and outer circumferential, the surfaces of the packer, each of which has a protecting layer of material effective to protect the elastomeric resin, each protecting layer 9, 11, are placed in the packer in a folded manner, in such a way that the unfolding of the layers enables the inflation of the packer.

Having studied the preceding quoted documentation, it is concluded that the same is not a hindrance for this application.

The object of this is to have a Hydraulic Packer constructed in glass-fiber reinforced epoxy and stainless steel.

Due to the increasing problems of corrosion in wells caused by chemical and bacteriological agents present in the production and injection fluids, the conventional tools for wells made of carbon steel have scarce durability and this provokes very expensive replacements.

It is prevailing then, to develop new tools that, being reliable in their operation, have also a useful life substantially higher than the traditional ones.

The hydraulic packer presented has been developed and designed with wholly corrosion resistant material, and is constructed with 70% Glass-Fiber Reinforced Epoxi, and 30% stainless chromium steel.

Unlike tools made of carbon steel that due to the corrosive environment of wells must often be replaced in less than a year, this tool can last more than a decade in contact with any kind of aggressive agents.

Because of its component material this is an ecological tool that avoids well pollution due to corrosion products and it contributes to protect the environment.

Due to its durability and corrosion resistance, it is intended to offer operative solutions through time, and contribute to protect the environment and safety.