Screen Packer Assembly Gravel Zone Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sand control methods in hydrocarbon production, such as screens and gravel packing, are prone to damage during installation and use, and face challenges in evenly distributing particulates, leading to unprotected areas and potential plugging of the wellbore.
Innovation Solution
A sand control filter system where a non-porous tubular member is filled with gravel and screen material, featuring filter zones of decreasing sizes and a swellable packer that engages the wellbore wall to ensure even flow through the filtering material, protecting the screen and preventing sand ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gravel packing is used to prevent sand ingress, then sand control is improved, but the gravel pack distribution becomes uneven and voids form leading to screen damage
Solution Approach 1:
The gravel pack is segmented into multiple zones with different grain sizes (first gravel pack zone with coarser grains, second gravel pack zone with finer grains) arranged in sequence. This segmentation allows each zone to perform specific filtering functions and prevents voids by ensuring continuous, uniform distribution of appropriately sized particles throughout the packer assembly.
Solution Approach 2:
Different regions of the gravel pack are assigned different local qualities through varying grain sizes. The first gravel pack zone uses coarser grains for initial filtration, while the second gravel pack zone uses finer grains for precise sand control. This local differentiation ensures optimal performance at each position and eliminates voids by maintaining appropriate particle density throughout.
2Reliability
If screen material is used to filter hydrocarbons, then sand control is improved, but the screen becomes vulnerable to damage at void areas in the gravel pack
Solution Approach 1:
The screen material is positioned within the packer assembly before the gravel pack is installed, creating a protected filtration layer. The surrounding gravel pack acts as a cushioning structure that prevents voids and protects the screen from direct exposure to high-velocity sand-laden flows, thereby preventing screen damage while maintaining filtration effectiveness.
Solution Approach 2:
The packer assembly creates a composite filtering system combining screen material (for fine filtration) and gravel pack (for coarse filtration and structural support). This composite structure allows the screen to perform its filtration function while the gravel pack provides mechanical protection and prevents void formation, enhancing overall system reliability.
3Adaptability or versatility
If conventional screens and gravel packing are used separately, then installation flexibility is improved, but the system becomes complex and prone to installation damage
Solution Approach 1:
The screen material and gravel pack are merged into a single integrated packer assembly that functions as one unified unit. This combination simplifies the overall system structure by eliminating the need for separate installation of screen and gravel pack components, reducing installation complexity while maintaining the flexibility to adapt to different well configurations through modular packer designs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system effectively prevents sand from entering the wellbore, reducing equipment damage and ensuring efficient hydrocarbon production by evenly distributing the filtering material, accommodating both vertical and horizontal well completions and varying production zones.
Implementation Method 1
the tubular member in the form of a packer that engages the wall of the wellbore to force flow through the filtering material. Indeed, in one embodiment the packer is a swellable packer.
Data Source
AI summary
Disclosed is a screen packer assembly for use in filtering hydrocarbons in a wellbore at a subterranean location. The screen-packer assembly connects in a production tubing string and packs off the wellbore and provides an axial filter path for hydrocarbons through the assembly and into the productions tubing.