EQUIPMENT FOR WELL FOAM DRILLING BASED ON “COMPOSITE SP”

The purpose of the paper is to justify the assembly of drilling equipment and the diagram of wellhead surface piping when drilling wells with bottom hole cleaning by a self-destructing foam in a closed-loop circulation cycle. Methods. The schemes of equipment piping for foam drilling of wells have been developed on the basis of the performed review and analysis of the technology and technical means. The equipment under consideration is applicable for various depth wells, methods of foam production for exploration drilling. The development results have been tested in the drilling of production wells. Results. The optimal regulation of airflow, foaming agent consumption and required pressure of foam injection is provided. Special booster compressors, which are mounted on the hydraulic part of the pumps of 11GRI or NB-4 type have been developed. They operate as compressor second stage and allow to neutralize the adverse effect of the hazardous space when working on a compressible environment. Preparation of foam in special surface foam generators allows to produce the high quality foam and ensure more rational use of the foaming mud. Justification is given to the possibility to control foam expansion ratio under its preliminary production by the selection of the optimal ratio of airflow and foaming agent consumption or variation of design parameters of a foam generator. Conclusions. The use of the proposed technological schemes of equipment piping (a low pressure compressor and a drilling pump with mounted aerators, compression chambers, boosters, as well as high pressure compressors for general flow foaming) for specific geological and technical conditions of foam drilling allows to achieve an optimal mode of trouble-free penetration of complicated horizons with the controlled hydrostatic pressure.

self-destructive foam, closed-loop circulation cycle, piping of foam producing equipment, foam generators, boosters, compressors, metering devices

1. Zalivin V.G. Self-destructive foambased drilling technology. Izvestiya Sibirskogo otdeleniya sektsii nauk o Zemle Rossiiskoi akademii estestvennykh nauk. Geologiya, poiski i razvedka rudnykh mestorozhdenii [Proceedings of the Siberian Department of the Section of Earth Sciences, Russian Academy of Natural Sciences. Geology, Prospecting and Exploration of Ore Deposits], 2014, no. 1 (44), рр. 50–54. (In Russian).

2. Fraser W.M. Method and device for blocking wells to extinguish fires, prohibit saltwater intrusion. Patent USSA, no. 4276934, 1981.

3. Zalivin V.G., Sapozhnikov Yu.M. Influence of metal salts on technological parameters of foams stabilized by carbamide resin. Izvestiya Sibirskogo otdeleniya sektsii nauk o Zemle Rossiiskoi akademii estestvennykh nauk. Geologiya, poiski i razvedka rudnykh mestorozhdenii [Proceedings of the Siberian Department of the Section of Earth Sciences, Russian Academy of Natural Sciences. Geology, Prospecting and Exploration of Ore Deposits], 2011, no. 2 (39), рр. 177–187. (In Russian).

4. Yakovlev A.I., Kovalenko V.I. Burenie skvazhin s penoi na tverdye poleznye iskopaemye [Well drilling with foam for solid minerals]. Leningrad: Nedra Publ., 1987, 128 р. (In Russian).

5. Bronzov A.S. Burenie skvazhin s ispol'zovaniem gazoobraznykh agentov [Well drilling with the use of gaseous agents]. Moscow: Nedra Publ., 1989, 288 р. (In Russian).

6. Muraev Yu.D. Gazozhidkostnye sistemy v burovykh rabotakh [Gas-liquid systems in drilling operations]. Saint Petersburg: Saint-Petersburg state mining Institute named after G.V. Plekhanov Publ., 2004, 123 р. (In Russian).

7. Kirsanov A.I., Krylov G.A., Nefedov V.P. Peny i ikh ispol'zovanie v burenii [Foams and their application in drilling]. Ekspress-informatsiya. Tekhnika i tekhnologiya geologorazvedochnykh rabot; organizatsiya proizvodstva [Express information. Machinery and technology of exploration, production organization]. Moscow: AllRussian research Institute of mineral raw materials named after N.M. Fedorovsky Publ., 1980, р. 60. (In Russian).

8. Tikhomirov V.K. Peny. Teoriya i praktika ikh polucheniya i razrusheniya [Foams. Theory and practice of their production and destruction]. Moscow: Khimiya Publ., 1983, 264 р. (In Russian).

9. Zalivin V.G., Buglov N.A. Sposob bureniya skvazhin na samorazrushayushcheisya pene po zamknutomu tsirkulyatsionnomu tsiklu, ustanovka i kompozitsiya samorazrushayushcheisya peny dlya ego osushchestvleniya [Well drilling method using self-destructive foam in a closedloop circulation cycle, installation and composition of self-destructive foam for its implementation]. Patent RF, no. 2498036, 2013. (In Russian).