A dissolvable magnesium bridge plug is a temporary sealing device
used in oil and gas wells to isolate specific sections of the
wellbore during operations such as fracturing, cementing, or well
testing. It is designed to provide a temporary barrier that can be
easily dissolved and removed from the well, eliminating the need
for mechanical intervention to retrieve it.
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Material: Dissolvable magnesium bridge plugs are typically made
from a high-purity magnesium alloy. This alloy is selected for its
ability to dissolve in downhole fluids, such as brine or acid, at
controlled rates.
Construction: The bridge plug is designed as a cylindrical or
tapered device, resembling a solid rod or cone. It is engineered
with specific dimensions and sealing elements to fit and isolate
the desired wellbore section.
Dissolution Process: When the dissolvable magnesium bridge plug
comes into contact with wellbore fluids, the magnesium alloy reacts
with the fluid, initiating a controlled corrosion process. This
gradually dissolves the bridge plug over a predetermined period,
allowing for the restoration of fluid flow.
Customization and Dissolution Rates: Dissolvable magnesium bridge
plugs can be customized based on wellbore conditions, such as
temperature, pressure, and fluid composition. The dissolution rates
can be tailored to match the required operational timeline and
environmental conditions.
Advantages: Using dissolvable magnesium bridge plugs offers several
advantages. They eliminate the need for costly and time-consuming
interventions to retrieve traditional mechanical bridge plugs. They
also minimize the risk of formation damage during plug removal,
enhance operational efficiency, and reduce environmental impact.
1. Purpose and scope of application
(1) Staged fracturing of horizontal wells is the main production
stimulation measure for the development of low-permeability and
unconventional oil and gas resources. Dissolvable Frac Plugs are
the main technology for staged fracturing of horizontal wells. With
the continuous development of low-grade resources, the length of
the horizontal section and the number of fracturing sections
continue to increase, and its importance becomes more and more
prominent. (2) The main body of the All-Metal Dissolvable Frac Plug
is made of high-strength soluble magnesium alloy, and the seals are
made of soluble alloy materials, which are suitable for
high-temperature or low-temperature oil and gas wells. The
pressure-bearing performance of the seal exceeds 70MPa, and the
dissolution rate after fracturing is adjustable and controllable.
Applicable wellbore conditions: vertical wells and horizontal wells
without direct contact with acidic operating environment
Setting tool model: Baker#10#20 Seating tool
Technical parameters
Max. test pressure: 60-90MPa
Rated working pressure difference: 35/50/70MPa
Max. working temperature: 120°C~160°C
Min. setting load: 100KN
Max. setting load: 140KN
Max. drop load: 140KN
Water-soluble medium: 0.5-2% chloride ion liquid
Sealing stability period: 24 hours
Loss of sealing time: 2-3 days
Completely water-soluble time: 6-10 days
Setting and feeding method: cable or hydraulic feeding
