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Packer apparatus

a technology of packaging apparatus and packaging shell, which is applied in the direction of sealing/packing, earthwork drilling and mining, and wellbore/well accessories, etc., and can solve problems such as sealing failures

Pending Publication Date: 2022-09-22
LEE PAUL BERNARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a deformable packer element that can be used in high-temperature wellbore environments. It is made of a corrosion-resistant metallic outer cover, which is useful when using elements in wellbore environments that produce corrosive chemicals such as carbon dioxide and hydrogen sulphide. Additionally, the text describes a straddle packer assembly that uses a ported sub to create a pressure differential to actuate the packers and isolate a section of wellbore to enable fluid to fracture the formation. This technology provides a reliable and effective solution for sealing and isolating wellbore sections during wellbore construction.

Problems solved by technology

However, in some wellbore environments, a combination of dissolved corrosive chemicals such as carbon dioxide, hydrogen sulphide and oxygen as well as high temperatures can corrode and damage packer elements leading to seal failures.

Method used

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Experimental program
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second embodiment

[0074]A packer apparatus 102 of the invention is shown in FIGS. 2a and 2b with parts common to the embodiment of FIGS. 1a and 1b shown with like reference numerals, but increased by 100.

[0075]Packer apparatus 102 comprises actuation apparatus 110 and hydraulic cylinders 112 and other pressure operated components that operate in exactly the same way as the embodiment of FIGS. 1a and 1b, such that the hydraulic actuation of the packer will not be described in any further detail with reference to the second embodiment. In this embodiment, deformable packer element 106 comprises deformable metallic outer cover 108 and a deformable elastomeric element 109. When the actuation apparatus 110 is activated, it moves to compress deformable elastomeric element 109 which in turn pushes deformable metallic outer cover 108 against the wellbore or casing to form a seal. To facilitate rotation of the deformable packer element 106 and prevent the elastomeric element 109 sticking on the body 104, the ...

third embodiment

[0077]A packer apparatus 202 of the invention is shown in FIGS. 3a and 3b, with parts common to the embodiment of FIGS. 1a and 1b shown with like reference numerals but increased by 200.

[0078]In this embodiment, packer apparatus 202 comprises a deformable packer element 206 having a deformable metallic cover 208 under which deformable elastomeric element 209 is disposed in common with the embodiment of FIGS. 2a and 2b. Also, the hydraulic operation of the apparatus 202 is identical to that of the embodiments of FIGS. 1 and 2 and will not be described in any further detail.

[0079]The difference between the embodiment of FIGS. 3a and 3b with that of FIGS. 2a and 2b is the inclusion of floating piston 232 in contact with actuation apparatus 210. When the actuation apparatus 210 is moved, it pushes floating piston 232 to compress deformable elastomeric element 209. The floating piston 232 is used to seal the elastomeric element 209 against the ingress of wellbore fluid which can contain ...

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PUM

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Abstract

A packer apparatus is disclosed. Packer apparatus comprises a body configured to be disposed in a wellbore and a deformable packer element disposed on the body. The deformable packer element comprises a deformable metallic outer cover. An actuation apparatus is configured to move relative to the body to deform said deformable packer element outwardly from the body to cause the deformable metallic outer cover to contact the surface of the wellbore or casing in which the apparatus is located. Deactivation of the actuation apparatus causes the deformable packer element and deformable metallic outer cover to return to a retracted condition.

Description

BACKGROUND OF THE INVENTION[0001]The present disclosure relates to a packer apparatus for engaging a surface of a wellbore or wellbore casing to create an annular seal or deform the wellbore casing, and relates particularly, but not exclusively to a workstring comprising a packer apparatus.[0002]In hydrocarbon production, packer apparatuses are used to create annular seals in open wellbores or wellbore casing to isolate sections of the wellbore. This can be particularly useful in hydraulic fracturing operations where compartmentalised zones of a wellbore are individually stimulated to produce hydrocarbons.[0003]The use of packers to isolate sections of wellbore can also be useful for example when abandoning wellbores to ensure that the sections of the wellbore are sealed to prevent leakage of hydrocarbons and other chemicals. However, in some wellbore environments, a combination of dissolved corrosive chemicals such as carbon dioxide, hydrogen sulphide and oxygen as well as high tem...

Claims

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Application Information

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IPC IPC(8): E21B33/128E21B23/04E21B23/06
CPCE21B33/1285E21B23/042E21B23/06E21B23/0412E21B33/1212E21B33/1243E21B33/128E21B33/1277E21B33/12E21B33/124E21B33/127
Inventor LEE, PAUL BERNARD
Owner LEE PAUL BERNARD