Well Testing Inc., a wholly owned subsidiary of Oil States International Inc. (OIS, NYSE), was founded in Monahans, TX in 1968. The company is one of the leading providers of surface production testing services in US markets. The company has developed a strong reputation for excellent, competent, and reliable service as well as one of the highest quality fit for purpose equipment fleets in the industry. Additionally, the company has a rapidly growing fabrication arm that specializes in gas measurement equipment, permanent production equipment, and on/offshore surface well testing equipment packages for international companies. Well Testing Inc. has its corporate office located in Midland, TX with operational facilities listed on our locations page of this site.