The facility for heavy drill tubes and guide tubes (the DT and GT facility) included in the M. V. Fnmze Scientific Production Unit (NPO) has a closed cycle which includes a flexible automated plant with steel-casting, forging-heat treatment, and mechanical processing sections. The technological processes introduced in the facility make it possible to produce tubes for which scrap iron is used as the starting material. The specialized plant is provided with high-technology equipment and highly reliable controllable production lines. Process control and monitoring is carried out by a central computer (computer automatic control system [ACS]), which based on the number and type of tubes determines the volume of the output with optimum utilization of the production facilities of the plant. The use of a central computer makes it possible to rapidly reorganize and modify the technological process according to the requirements imposed by the final product, and at the same tLrne to monitor how the specified program is carried out. The central computer is directly connected to the individual equipment units. The heavy drilling tube and guide drilling tube (HDT and GDT) produced by the plant satisfy the requirements of the American Petroleum Institute (API) standards, and this is confirmed by quality certificates. The HDT and GDT are used for drilling operations in geological expIoration and in the recovery of petroleum and gas. The HDT is intended for setting up axial forces on the cutting tool, transfer of the torque, and stressing the entire drilling column in order to reduce its flexure and vibration. Depending on the constructional features, the outer tube surfaces are used for aligning deformed wells and for drilling sheafs of fan-shaped inclined wells. The GTDs are intended for the transfer of the torque from the outer drive of the drill column. The DT and GT facility produces 13 types (262 standard sizes) of forged tubes, heat treated over the entire length, from AISI 4145H steel (to the American standard), which is melted in an electric furnace, refined in a flarnace !adle, and subjected to vacuum treatment and electromagnetic mixing. The constructional features of the tubes are shown in Fig. 1 (the types of couplings and nipples are shown according to the API standards), and the tube dimensions and mechanicalpreperties of the steel are given in Table 1. It should be noted that the DT and GT facility produces high-qualityproducts, corresponding to the best in ~e world. The quality is achieved as a result of satisfying the organizational and technical practices during working wi• suppliers, careful