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Rat hole bypass for gravel packing assembly

a technology of gravel packing and bypass hole, which is applied in the direction of borehole/well accessories, drilling casings, drilling pipes, etc., can solve the problems of sand absorption, damage to tubing, pumps, etc., and the flow velocity in the rat hole area may not be sufficient to keep the sand fluidized

Inactive Publication Date: 2006-02-23
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sand in the produced fluids can abrade and otherwise damage tubing, pumps, etc. and must be removed from the produced fluids.
In some cases, especially in horizontal wells, the flow velocity in the rat hole area may not be sufficient to keep the sand fluidized.
However, the increased rate usually requires higher pump pressure.
The higher pump pressure may cause undesirable fluid leak off into the formation and in some cases may cause undesirable fracturing of earth formations.

Method used

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  • Rat hole bypass for gravel packing assembly
  • Rat hole bypass for gravel packing assembly
  • Rat hole bypass for gravel packing assembly

Examples

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Embodiment Construction

[0016] Various elements of the embodiments are described with reference to their normal positions when used in a borehole. For example, a screen may be described as being below or downhole from a crossover. For vertical wells, the screen will actually be located below the crossover. For horizontal wells, the screen will be horizontally displaced from the crossover, but will be farther from the surface location of the well as measured through the well. Downhole or below refers to a position in a well farther from the surface location in the well.

[0017] An annulus, as used in the embodiments, is generally a space between two generally cylindrical elements formed when a first generally cylindrical element is positioned inside a second generally cylindrical element. For example, a tubing is a cylindrical element which may be positioned in a wellbore, the wall of which is generally cylindrical forming an annulus between the tubing and the wellbore. While drawings of such arrangements ty...

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PUM

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Abstract

A gravel packing slurry bypass for use between a cross-over and a screen in a gravel packing assembly. The bypass includes a section of tubing connected between the cross-over and screen. A liner is carried on the tubing. A seal is carried on the liner to block slurry flow in an annulus outside the liner. The bypass is sized and positioned to provide a slurry bypass flow path past a rat hole.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] None. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. REFERENCE TO A MICROFICHE APPENDIX [0003] Not applicable. FIELD OF THE INVENTION [0004] The present invention relates to gravel packing of hydrocarbon producing wells and more particularly to a gravel packing slurry bypass for gravel packing assemblies. BACKGROUND OF THE INVENTION [0005] Oil and gas wells are often completed with an open hole in unconsolidated formations containing fines and sand which flow with fluids produced from the formations. The sand in the produced fluids can abrade and otherwise damage tubing, pumps, etc. and must be removed from the produced fluids. Gravel packs which include sand screens and the like are commonly installed in wellbores to filter out the fines and sand in the produced fluids. [0006] In a typical gravel packing operation, a screen is placed in the wellbore and positioned within the producing zone. The s...

Claims

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Application Information

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IPC IPC(8): E21B43/04
CPCE21B43/045E21B17/18E21B43/04
Inventor PENNO, ANDREW D.HAILEY, TRAVIS T. JR.
Owner HALLIBURTON ENERGY SERVICES INC