Power delivery is the fundamental bottleneck in downhole setting operations. A tool that must transform surface energy into a controlled axial force at depth faces severe constraints on body diameter, temperature rating, and the electrical current available through a wireline conductor, and for decades the industry resolved this problem with combustible propellant charges. The electro-hydraulic setting tool removes the explosive element entirely by converting electrical energy into hydraulic pressure through a compact motor-pump assembly, a design principle that has steadily displaced chemical tools across deepwater and high-pressure well intervention programs. Because no burning charge is involved, the tool can be handled, transported, and deployed without the licensing and storage burden associated with explosives.
Motor-Pump Assembly in Electro-Hydraulic Setting Tools
The heart of the system is a miniature hydraulic power pack built around a direct-current motor driving a positive-displacement pump. A 220-volt DC supply delivered through the cable energizes the motor, which pressurizes hydraulic fluid in a sealed circuit and drives a piston forward to generate the setting stroke. The closed-loop hydraulic architecture produces setting forces far larger than the motor alone could deliver, with force output reaching the equivalent of tens of tons while the tool body remains slim enough to run through completion equipment. The sealed hydraulic circuit is qualified across a service envelope extending from -30°F to 350°F, and the working pressure rating of 20,000 psi (approximately 140 MPa) matches the demands of high-pressure completion strings.
Setting force generated by hydraulic intensification, not by propellant combustion
Pressure-balanced internal chambers keep output consistent regardless of mud density at depth
Hydraulic Circuit with Return-Oil Reset
One distinctive element of the design is a return-oil reset valve that restores the working state immediately after a setting cycle. Instead of opening the tool between runs to reset the mechanism, the operator initiates a new cycle through the same hydraulic circuit, which flushes and re-pressurizes the system in place. This arrangement shortens the interval between consecutive setting operations and reduces the number of sealing components exposed to wellbore debris, lowering maintenance frequency and the cost per job.
Reset accomplished downhole without pulling the tool to surface
Fewer wetted seals translate into lower troubleshooting rates on location
Releasable Unit for Electro-Hydraulic Setting Tool Safety
Recovery contingencies are engineered into the tool through a dedicated releasable unit. If the setting tool cannot be separated from the bridge plug or packer after the job, the release mechanism allows the operator to drop the stuck assembly, avoiding a twisted-off string or a permanently stuck fish that would require costly fishing operations. This contingency feature converts a potentially lost-well event into a controlled, recoverable situation and is a decisive advantage over designs that offer no separation path.
Emergency release prevents stuck-tool fishing jobs in high-risk wells
The release sequence is logged by the electronic control module for post-job analysis
Stroke, Force Control, and Adapter Compatibility
Different bridge plugs, frac plugs, and packers require different setting strokes and adapter interfaces. The tool family spans multiple body sizes with strokes ranging from approximately 7.87 inches up to 10 inches, and the force curve is controlled electronically so that the set is applied smoothly rather than as an impact blow. Adapters matching common setting tool styles let one power pack drive a wide range of downhole equipment, reducing the number of tools an operator must inventory for a campaign.
Stroke length matched to plug and packer requirements across standard sizes
Real-time recording of setting force and stroke position supports quality reporting
Conclusion
The electro-hydraulic setting tool has become the preferred choice for well completion and abandonment work because it couples the power of hydraulic actuation with the control and safety of electronics, eliminating explosives from the wellsite. China Vigor's Pro-Set product line packages this architecture with field-proven reliability, offering operators a non-explosive, data-rich path to set bridge plugs and packers in wells drilled past 10,000 feet. For crews that value safety and repeatability, the technology represents a durable step forward.
For more information, please contact China Vigor at info@vigorpetroleum.com or call +0086 29 81161513.
