Dale Redman
Analyst · Raymond James
Thanks, Sam. Good morning, everyone. We appreciate you joining us for today's call. Before I get into discussion about our results for Q2, I thought it would be beneficial to provide a brief overview and update on what we are seeing in the Permian. With 100% of our fracturing operations focused on the Permian as well as being headquartered in Midland, we have a good perspective on what is happening in the field, not just with our operations but also from a broader perspective. The region is benefiting from healthy frac demand that is outpacing available supply. E&P companies continue to stay active while fine-tuning completion designs that yield attractive oil economics with low breakeven pricing, and we expect that process to continue well into 2018.
The current rig count and undersupply of frac capacity continues to benefit pressure pumpers in the region. Clearly, the current rig count is positive for ProPetro, but even more important is the customer-specific demand for our services due to our best-in-class operational execution. As such, even if we entered into a period of declining rig count in the region, we are confident that our frac fleet will remain fully utilized over the long term with continued opportunities for growth at attractive margins.
Finally, we are seeing an evolution in the infrastructure and related logistics in the Permian, especially as it relates to procuring sand closer to where our operations are located. This bodes well for our cost structure and should also help our customers manage their completion cost. We are clearly pleased by our results during the period, but it is important to note that we would not have seen this success without the continued support of our customers. These relationships are the life blood of the company and this view has served us well through the many cycles we have seen over the years.
Bottom line, we recognize that if our customers are successful, so are we. Given that, I want to formally thank our customers for their continued support, and we look forward to working closely with them for many years to come. We also could not have gotten to where we are without the hard work and dedication of what I consider the finest group of employees and support contractors in the industry. Again, thanks to all of you for what you do to make our company one of the most highly regarded in our industry in terms of operational excellence.
Our financial results for the quarter were outstanding across the board. As compared to Q1, revenue was up 24%. Even more impressive was the 89% increase in adjusted EBITDA, which helped drive a 500 basis points improvement in margin from Q1. Contributing to our results was the continued full utilization of our frac fleet, including 2 new fleets added during the period. The full utilization of our fleet, coupled with the undersupplied market contributed to the margin expansion during the quarter.
Many of our customers are very excited about the prospect of West Texas regional sand and as a result, we will eventually use more sand that is mined here in West Texas. This dynamic should bode well for our cost structure, our customers' cost structure and the efficiency of our supply chain.
I am also pleased to announce that we deployed the 2 new build frac fleets during Q2 ahead of schedule. In addition, in mid-July, we deployed another new build fleet. This brings us to a current fleet capacity of 555,000 horsepower or 13 fleets, with the 14th fleet expected to be deployed by the end of August. Finally, we continued our transition from carbon to stainless fluid ends during Q2, and we remain on track to complete this transition sometime in the fourth quarter.
Today, a 100% of our fluid end purchases are stainless, and this will continue to improve our maintenance efficiencies as well as drive down maintenance cost. As most of you remember we previously discussed our target of organically growing to a total capacity of 600,000 horsepower by the end of 2017. Due to the overwhelming customer demand, we've made the decision to accelerate delivery of 2 additional new build fleets that were originally planned for 2018 to now arrive and be deployed in the fourth quarter of 2017. These 2 fleets come with commitments for 2 years under attractive terms. Each of the 2 private E&P operators that will be utilizing the new fleets have been outstanding partners to ProPetro for over 6 years. Combined with our attractive new build cost structure, this was a straightforward decision for the company. Jeff will discuss our economics in more detail a bit later.
In addition, to support ProPetro's long-term plans for optimizing total capacity and operational performance of its entire frac fleet, we will be purchasing an additional 86 Tier 2 diesel engines by year-end 2017. These components can have long lead times, so making this decision gives us more flexibility. Further, these additional engines give us ability to build new frac capacity where there is an opportunity to put new units to work with dedicated customers and provide new engines for the existing fleet maintenance program.
Overall, we expect to realize cost savings of up to $30 million with these purchases. I am also pleased to note that we are seeing increased demand for cementing services and have responded by adding 2 new build units. The first of these commenced operations in June, while the second should be deployed by the end of the third quarter. This will bring our total cementing fleet to 14 units. We will continue to look for opportunities to further expand our cementing fleet and other services as the market and capital allocations needs allow.
I will now turn it over to Jeff to discuss our Q2 results in more detail as well as our capital spending outlook and related economics. Jeff?