The following is an analysis of our well servicing operations for each of the quarters in 2017, the full year ended December 31, 2017 and quarters ended March 31, June 30 and September 30, 2018:
|421 ||157,600 ||52% || ||$||307 ||$||49 ||16% || |
|421 ||162,300 ||54% || ||$||321 ||$||69 ||21% || |
|421 ||165,200 ||55% || ||$||329 ||$||69 ||21% || |
|421 ||159,500 ||53% || ||$||339 ||$||63 ||19% || |
|421 ||644,600 ||54% || ||$||324 ||$||63 ||19% || |
|310 ||168,500 ||76% || ||$||338 ||$||55 ||16% || |
|310 ||181,600 ||82% || ||$||348 ||$||81 ||23% || |
|310 ||180,300 ||82% || ||$||357 ||$||67 ||18% || |
Rig utilization was 82% in the third quarter of 2018, flat with 82% in the second quarter of 2018. The utilization rate in the third quarter of 2018 resulted from a sustained improvement in customer demand and activity, primarily for our 24-hour rig packages. Our segment profit percentage decreased to 18% for the third quarter of 2018 compared to 23% in the second quarter of 2018, on increased onboarding costs and continued pricing pressures.
During the first nine months of 2018, our Water Logistics segment represented approximately 24% of our revenues. Revenues in our Water Logistics segment are earned from the sale, transportation, pipelining, storage, and disposal of fluids used in the drilling, production and maintenance of oil and natural gas wells. Revenues also include water treatment, well site construction and maintenance services. The Water Logistics segment has a base level of business consisting of transporting and disposing of salt water produced as a by-product of the production of oil and natural gas. Water is transported through trucking or via pipeline.
Pipelining of water represented approximately 27% of total water disposed in the quarter ended September 30, 2018. These services are necessary for our customers and usually have a stable demand, but typically produce lower relative segment revenues than other parts of our water logistics segment. Water logistics for completion and workover projects require fresh or brine water for making drilling mud, circulating fluids or fracturing fluids used during a job, and all of these fluids require storage tanks and hauling and disposal. Because we can provide a full complement of fluid sales, trucking, storage and disposal required on most drilling and workover projects, the add-on services associated with drilling and workover activity generally enable us to generate higher segment profits. The higher segment profits are due to the relatively small incremental labor costs associated with providing these services in addition to our base water logistics operations.
Revenues from our water treatment and recycling services include the treatment, recycling and disposal of wastewater, including fracturing water and flowback, to reuse this water in the completion and production processes. Revenues from our well site construction services are derived primarily from preparing and maintaining well locations, access roads to well locations, and installing small diameter gathering lines and pipelines, constructing foundations to support drilling rigs and providing maintenance services for oil and natural gas facilities. We typically price fluid services by the job, by the hour, or by the quantities sold, disposed of or hauled.