NEW VANISHING CHIP AND ITS TESTS IN LABORATORY CONDITIONS
Abstract
The aim of the study is to develop a pin-type blade bit with increased productivity, durability and low energy consumption when drilling wells in soft rocks and partly in medium hard rocks.
Research methodology to achieve this goal is to conduct the following theoretical, experimental design and experimental work: theoretical method for determining the actual distribution of external axial load on the cutters installed along the radial blades of the bit; analysis of the mentioned distribution and finding out the reason for the “hanging” of the vane bits over the central part of the borehole bottom; performance of experimental and constructive works on the creation of a new blade type of a pinhole type, while drilling of which there is no “hovering” of the bit; carrying out laboratory studies made with new picoburs; statistical processing of test results for new picoburs and justification of the expected economic effect during their implementation.
As a result, a picоbur was developed, patented, the design of which is new and useful. Laboratory tests showed that the productivity of drilling with the new picobrow increased by 24%.
The introduction of the patented picobur into the practice of drilling geotechnological wells will give a certain technological and economic effect.
The results obtained can be used to create blade peak-shaped bits equipped with diamond-carbide cutters PDC, which will be successfully used in drilling oil and gas wells.
The conducted studies are of great practical importance due to the massive drilling of geotechnological wells for the extraction of uranium raw materials in the Republic of Kazakhstan.
The value of the research lies in obtaining new scientific information explaining the complications of drilling with blade-shaped, peak-shaped blade bits and being the basis for the development of new, patentable bits that destroy the rock in cutting mode.
