Wizard ZERO Large-Bore Dissolvable Collet

Majority portion of dissolvable frac plugs on the market are still made up of many complex components, limiting the inner diameter and fluid contact area, which compromise dissolvability. Therefore, the first generation of dissolvable plugs still face big challenge, and require a clean-out-run before producing the well. To truly overcome these inevitable challenges associated with traditional dissolvables, Vertechs introduced a new generation intervention-less dissolvable collet, for both high and low temperature applications (100-350℉), 10,000 psi pressure rating, with a length of less than 2.5". Once stimulation is completed, the well can be flowed back immediately through the extreme large ID of the tool, preventing downhole debris or sand from packing up, eliminating the need of clean out runs, and saving substantially on intervention cost.

Features
Specification
Case Study
Technical Video
Technical Publictaion
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Features

Impact resistance, anti-preset, zero packing element, no speed limit
10,000 psi pressure rating, customized for both high and low temperature applications
ID sealing component dissolve quickly, granting ultra-large flowback channel
Collet dissolves within 3 - 7 days

Specification

Casing Size in.[mm]	Casing Weight (lb/ft)	Casing ID in.[mm]	Collet OD in.[mm]	Collet ID in.[mm]	Length in.[mm]	Pressure Rating psi.[MPa]
5.5”	17.0 - 20.0	4.780 - 4.892 [121.36 - 124.26]	4.488 [114]	2.776 [70.5]	4.606 [117]	10000 [70]
	23.0	4.67 [118.62]	4.252 [108]	2.52 [64]	4.114 [104.5]
	26.8	4.5 [114.3]	4.094 [104]	2.362 [60]	4.114 [104.5]

Case Study

BACKGROUND

Many operators has switched to dissolvable frac plugs from composites to shorten postintervention time and improve operation efficiency. Recent years, in the southwest region of China, tight gas development is also shifting from composites towards full lateral dissolvable.
However, in these shallower formations, plugs not dissolving fully has became a common issues among operators, experiencing extended post intervention, even surpassing the drill out time of composites. Some operators told us it can take nearly a hour to drill out a dissolvable plug. Instead of improving their efficiency, it made it more time consuming and costly.
FINDINGS
Looking into the problem in detail, we quickly identified some key factors which can lead to slow dissolution.
- Firstly, the formation temperature is relatively lower than the shale plays in this region. In most tight gas wells, the downhole temperature is between 140-158°F.
- Secondly, there were plenty of water supply nearby, the frac fluid is mostly fresh water, salinity is below 1,000 ppm.
- Thirdly, some operators deployed dissolvable plugs were designed for the shales, which had much higher temperature rating (250'F and above) resulted slower dissolution time in this case.
- Finally, most dissolvable plugs used here were based on traditional plug designs, which have many parts and a lot of materials.
Although many were made of low temperature rated materials, they still could not dissolve quick enough. During clean out run, they were pushed towards the toe and form a pack off between every 5-6 stages.
SOLUTIONS
So doing what we do best. That is finding out the problem and provide a solution, we designed Wizard ZERO Large-Bore Dissolvable Collet to address dissolving and intervention issues. The theory behind the design is “Simple”. We managed to compact all the core functions of a frac plug in to one component, and it works.
In Oct 2022, another operator switched to Wizard ZERO Large-Bore Dissolvable collet after conducting below comparison trial with another competitor's dissolvable plugs.
PARAMETERS:
- Downhole Temperature: 150°F
- Frac Fluid Salinity: 379 ppm
- Flowed Back Fluid Salinity: 735 ppm
- Casing Size: 5.5”23 ppf P110
- Lateral Length: 5016.4 ft
- Stage Count: 15
POST INTERVENTION (40 HOURS AFTER FRAC):
- 1st heel plug NO TAG
- Last toe plug NO TAG
- Mill out time ZERO

Technical Video

In hydraulic fracturing, every second counts, impacting both efficiency and cost. Traditional dissolvable plugs require time to dissolve before a well can flow back. But what if you could eliminate well shut-in time entirely?
With Vertechs Wizard ZERO Large-Bore Dissolvable Collet, you will get ZERO milling, ZERO waiting on dissolution, and a direct large ID flow path with a minimalistic design. This enables a seamless transition from frac to production, saving up to 7 days per well, with no changes needed to your existing plug & perf process.