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Yakimenko Dmitry

Yakimenko Dmitry

Mining-geological faculty

Speciality: Technology and technics of investigation of mineral deposits

Theme of master's work:

Development and investigation of projectile for drilling wells, while overlapping

Scientific adviser: Jushkov Ivan Alexandrovich

Materials on the theme of master's work: About author

Summary of research and developments

At this time, great attention is paid to the time that is spent on drilling and support operations. Attention is given to reduce the cost of the work, as well as the simplicity of the equipment. Therefore, for a more efficient drilling of soft rocks developed a device designed to effectively water erosion species with simultaneous overlapping well.
Device allows you to save on expensive rock instruments, because it enables them to get well without using them. Instead, the site is water erosion, which consists of the shoe and the tips within it. As the washing fluid is water, as well as in the clay solution is not necessary. Due to the possibility of building the following sections of casing without cessation water erosion, drilling time is greatly diminished. It also decreases the likelihood of stuck projectile. After the end of the space inside the shell casing remains completely free, which allows further use of this borehole.
The basis of the device with the task of drilling wells and floors of casing be omitted from the surface in order to consolidate the walls of wells, with continuous feeding washing liquid and the preservation of a free full internal cross section of pipe after the drilling. The task is solved by the fact that the device for the drilling of overlap, which includes a device to override sectional pipe, check valve and the injection system of hoses, a device to override sectional pipe made in the form of a solid piston as set forth in the coupler casing latch, a check valve in the pipe is located below the sleeve. Claims signs are the essence of the developed device, because it is both necessary and sufficient to ensure the technical effect - drilling wells and floors of casing be omitted from the surface in order to consolidate the walls of wells, with continuous feeding washing liquid and the preservation of a free full internal cross section of pipe after the drilling.
The composition of the device is composed of casing with couplings, inside which the device is available to override sectional tubes, made in the form of a solid piston with elastic cuffs. The piston is embodied in the clutch catch, which are part of a ring slot. Difference of upper and lower diameter of the piston creates a cliff. At the pipe sleeve is located below the non-return valve to which the delivery hose. Injection system consists of two hoses and the three-crane, with which you can file a washing fluid in a tube. At the lower end of the casing shoe and located hydro-nozzle. To increase use of casing pipe or section of tubes.
The advantages of the developed mechanism are:
- Effective water erosion of soft rock under the shoes and around it, which is achieved through the holes in the hydro-nozzle and the walls of the shoe;
- Ability to build the following sections of casing cut without fluids, which is achieved through the use of three-tap and check valves in the walls of casing;
- The possibility of a free full internal cross section of drill pipe after work, as well as overlapping area at the time of the projectile plunger easily extracted to the surface after the end of work;
- Reducing the likelihood of stuck projectile, due to the continued application of the liquid;
- The use of standard drill pipe and couplings.
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