ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
104
IMPROVED GROOVE PIPE DRILLING PROJECTILE ANALYSIS.
Adizov D.SH.
Mamasharifov B.R.
Boltayev M.A.
Uzbekistan, Navoi, Navoi State Mining and Technological University
https://doi.org/10.5281/zenodo.15722192
Annotation.
In this article. In the case of cleaning and drilling the bottom of
the screwdriver with air, due to the low thermal conductivity of the air,
problems arise with reducing the efficiency of the rock-shattering tool as a result
of the formation of high temperatures on the bottom of the screwdriver, which
negatively affects the efficiency of the rock-shattering tool. In the process of air-
assisted drilling of the skewers, an improved design of a hollow tube drilling
projectile was developed to air-clean and drill the bottom of the skewers in
order to cool the temperature of the air being sent to the skewers.
Key words:
hollow pipe, drilling projectile, compressed air, pressure,
temperature, cold air, dolota.
Introduction.
Today, 35-40% of the total drilling work carried out at mining and
geoscientific Industries is the method of cleaning and drilling the bottom of the
squash with air, and the remaining 60-65% with washing-up liquids prepared
on the basis of water. In the process of air-assisted cleaning and drilling, it is
possible to normalize the temperature modes of the rock-shattering instrument
by cooling the temperature of the air being sent to the squash, however, due to
the low heat capacity of the air, it remains equal to the temperature of the rock
until it reaches the bottom of the squash. Therefore, in order to effectively
normalize the temperature modes of the rock-shattering tool when air-cleaned
and drilling of skewers, an improved heap pipe drilling projectile was developed.
Figure 1 presents the structural structure of the hollow pipe.
Image-1. Construction of a hollow pipe.
1-tube, 2-gaika, 3-Hull, 4-tube, 5-cold–air fraction generator on cold side; 6-
gaika; 7-tube; 8-Drossel, 9-krestovina, Loop 10
Materials and Methods.
ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
105
The initial air temperature (th) was 40
℃
, the axial pressure force (Pos)
was 5 kN, and the temperature (tzab) formed in zaboy was 88
℃
when the
number of revolutions (n) of the Dolata was provided in 60 min-1cats.
2-Image. Graph of dependence of the temperature of Zaboy on the number
of revolutions of dolota and the temperature of the cleaning air (th = – 15
℃
)
Results and conclusions.
Based on the analysis of the results of observations in drilling practice and
the data of the technical literature [5; 54-137-B, 23; 1-5-B, 24; 5-52-B], it was
determined that in order to ensure the rational performance of the rock-
grinding tool when drilling the skewers with air, its temperature, that is, the
temperature that will be formed in zaboy, should not exceed 300-320
℃
.
In practice, it is technically impossible to directly measure or control the
temperature generated in the squagina zaboi during the drilling process, it is
known that drilling modes i.e., at small indicators of the axial pressure force and
the number of revolutions, the temperature in zaboi is low. But in this case, the
mechanical speed of drilling decreases, that is, the rational drilling mode is not
provided. Increasing the axial pressure force and the number of revolutions
given to the dolota increases the mechanical speed of drilling, but in doing so the
temperature in the zaboi increases and the operability of the dolota decreases.
By cooling the temperature of the cleaning air, it is possible to lower the
temperature of the zaboy, but complete normalization of the zaboy temperature
cannot be achieved if the rational indicators of the drilling mode are not
provided.
The results of the experimental studies presented above made it possible to
determine the rational indicators of the drilling regime, which increase the
efficiency of the transfer of the screw in the process of drilling the screws with
compressed air
0
50
100
150
200
250
300
350
400
450
500
50
60
70
80
90
100
110
120
130
140
150
T
emper
ature
of z
aboy
t
заб,
°C
Dolota number of rotations n,
rotation / minute.
5 кН
7,5 кН
10 кН
12,5 кН
ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
106
List of references:
1. Pustovoitenko I. P., Selvashchuk A. P. “Handbook of the master of complex
drilling operations" 1983
2. Basarygin Yu.M., Bulatov A.I., Proselkov Yu.M. “Technology of drilling oil and
gas wells" 2001
3. SSK: Drilling Specialist's Handbook.
4. Abubakirov V.F., Arkhangelsky V.A., Burimov Yu.G., Malkin I.B. “Drilling
equipment" 2000
