Screen Joint Perforation for Reliable Fluid Production
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Solution Overview
Problem
In oil and gas well production, unconsolidated formations can cause formation particles to invade the wellbore, reducing production efficiency and damaging equipment due to unreliable sliding sleeves in downhole environments.
Innovation Solution
The use of mechanically-generated perforations in screen joints to open a communication path for fluid flow, allowing filtered formation fluids to enter the production tubing while preventing particulate invasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sliding sleeves are used to isolate screens from formation fluids, then fluid flow can be controlled, but the sliding sleeves become unreliable due to debris and corrosion in downhole environments
Solution Approach 1:
The patent removes the sliding sleeve component entirely from the system. Instead of using a sliding sleeve to isolate the screen, the invention employs a blank housing that is permanently coupled to the base pipe, eliminating the need for mechanical opening/closing mechanisms that are susceptible to debris and corrosion.
Solution Approach 2:
Rather than using a mechanism that opens to allow flow (sliding sleeve), the invention uses a blank housing that is permanently closed and requires mechanical perforation to create openings. This inverts the approach from active opening to passive opening through perforation.
2Object-affected harmful factors
If screens are disposed on the exterior surface of production tubing, then formation fluid can be filtered, but particles can still invade the wellbore and damage equipment
Solution Approach 1:
The screen element is nested within the blank housing structure, which itself is coupled to the base pipe. This nested arrangement ensures that the screen is properly positioned and protected while maintaining its filtering function. The screen filters formation fluids before they enter the production tubing, preventing particulate material production.
3Reliability
If mechanically-generated perforations are created in screen joints, then reliable fluid production can be initiated, but the base pipe structure must be modified to accommodate perforation
Solution Approach 1:
The base pipe is segmented into functional zones: a non-perforated portion that maintains structural integrity, a perforated portion that allows fluid entry, and coupling portions that connect to the blank housing. This segmentation allows the pipe to serve multiple functions while maintaining reliability in fluid production initiation.
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 method enables reliable and efficient initiation of hydrocarbon production by creating controlled openings in the screen joints, reducing equipment wear and increasing production efficiency by filtering out unwanted particles.
Implementation Method 1
a mechanical perforator... generating an opening in the non-perforated base pipe
Implementation Method 2
a screen element... coupled to an exterior surface of the non-perforated base pipe... filtering out unwanted particles
Data Source
AI summary
Example systems and methods are described that operate to open screen joints using mechanically-generated perforations for beginning fluid production. In an example system, a screen joint is deployed in a production tubing within a wellbore. The screen joint includes a screen element and a blank housing that are coupled to an exterior surface of a non]perforated base pipe. Further, the screen joint includes a locator profile positioned along an interior surface of the non]perforated base pipe. A perforator is deployed within the screen joint that includes a mechanical perforator and a locator for engaging with the locator profile to position the mechanical perforator under the blank housing.