Modular Downhole Packer With Floating Compression Seal
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Solution Overview
Problem
Traditional inflatable packers require precision-finished mandrels, which are costly and logistically challenging to manufacture, stock, and deploy in wellbore operations, and they are sensitive to the surface quality and dimensional accuracy of the tubulars used, limiting their flexibility and sealing effectiveness.
Innovation Solution
A modular downhole packer system that uses a valve body with threaded couplers to couple with existing tubulars, a packer element assembly, a floating seal element, and a floating end anchor with a compression seal, allowing for sealing without the need for precision-finished mandrels and accommodating non-precision tubulars, ensuring a reliable fluid seal across varying surface conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional inflatable packers use precision-finished mandrels, then sealing reliability is improved, but manufacturing cost and logistical complexity increase
Solution Approach 1:
The packer system is divided into separate modular components: a valve body assembly, a packer element assembly, and a floating end anchor assembly. Each component can be manufactured independently using standard processes and assembled in the wellbore, eliminating the need for a single precision-finished mandrel while maintaining sealing reliability through the modular design.
Solution Approach 2:
The invention introduces a compression seal as an intermediary sealing element between the floating end anchor and the packer element assembly. This compression seal compensates for surface irregularities and dimensional variations in standard tubulars, providing reliable sealing without requiring precision-finished mandrels or highly accurate tubular dimensions.
2Reliability
If traditional inflatable packers use precision-finished mandrels, then sealing effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
The invention replaces expensive precision-finished mandrels with standard, off-the-shelf tubular components. The compression seal and modular assemblies can be manufactured using conventional processes and are significantly cheaper than precision mandrels, while still achieving effective sealing through the design of the compression seal and modular component interfaces.
3Reliability
If traditional inflatable packers use precision-finished mandrels, then sealing reliability is improved, but adaptability to different tubulars decreases
Solution Approach 1:
The modular packer system is designed to interface with standard tubulars through universal threaded connections and mechanical couplers. The compression seal provides a universal sealing mechanism that works with various tubular types and surface conditions, making the system adaptable to different wellbore configurations and tubular specifications without requiring precision-finished mandrels for each application.
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
The modular design reduces logistical complexities and costs by utilizing standard tubulars, maintains a reliable fluid seal across a range of surface conditions, and ensures effective sealing without requiring precision-finished mandrels, enhancing operational flexibility and efficiency in wellbore isolation.
Implementation Method 1
a compression seal positioned within a seal pocket formed in the compression seal housing
Implementation Method 2
in response to an increased pressure within the bladder, expand until they contact the surrounding wellbore or tubular
Implementation Method 3
Typical inflatable packers use elastic bladders positioned on the outside of a precision mandrel
Data Source
AI summary
A modular downhole packer includes a valve body, which includes a threaded coupler adapted to couple to a tubular and a valve assembly. The packer includes a packer element assembly, which includes a first end coupler, the first end coupler mechanically coupled to the valve body; a packer element; and a second end coupler. The packer includes a floating seal element mechanically coupled to the second end coupler, the floating seal element including a seal extension. The packer includes a floating end anchor. The floating end anchor includes a compression seal housing, the compression seal housing including an outer sealing surface positioned within the seal extension of the second end coupler; a compression seal positioned within a seal pocket formed in the compression seal housing; and an anchor body, the anchor body threadedly coupled to the seal pocket of the compression seal housing, the anchor body abutting the compression seal.