Several computerized data bases were searched, and telephone interviews were conducted with nearly 100 experts in drilling R and D. The following information was obtained for each organization engaged in water jet drilling (WJD) R and D: program descriptions, program status, future plans, level of effort, source of funds, and problems encountered in WJD programs. WJD programs were classified in terms of surface pressure requirements. A total of 18 downhole-WJD programs were identified, with 9 using high surface pressures (5000 psi or higher) and 9 requiring only conventional or low surface pressures (generally below 3500 psi). The high-pressure approach to WJD has been investigated much more intensively than the low-pressure approach. Most drilling experts consider the lack of reliable surface equipment such as mud pumps and swivels to be the most critical problem associated with high-pressure WJD. Several programs to develop improved surface equipment for high-pressure operation were also identified. In addition, 28 organizations investigating non-downhole uses of water jets, such as mining or excavation, were also identified. Several large WJD programs were terminated during the 1970's because of a variety of problems. Two significant field programs are planned for 1980.