Comparative analysis of API standard drilling pipes and those of with double shoulder tool joints

The paper presents the data on the types, design peculiarities and requirements for the drilling pipes used in construction, overhaul repair and sidetracking. The comparative analysis of the pipes made with single shoulder tool joint according to API standard, as well as high torque and high efficient double shoulder tool joints from the world leading producers Pipe-Metallurgy Company “TMK”, National Oilwell Varco (NOV), HILONG Group of Companies is provided. Comparative analysis of the drilling pipes, as well as the double shoulder tool joint is presented. The exchangeability and non-exchangeability of drilling pipes with single shoulder tool joint produced in accordance with API standard with those of double shoulder tool joints indicating their structural features are marked as well. The comparison of stability coefficients of torques of drilling pipes in regard to the pipe body characterizing important operation parameters of nominal size of drilling pipe with double shoulder tool joint used in the overhaul repairs and sidetracking are provided.

Desain dan Fabrikasi Alat Ukur Temperatur dan Kelembaban Udara Dalam Tanah Berbasis Mikrokontroler ATMega8535

Measuring device that used for measuring temperature and humidity inside soil digitally has been realized. The measuring device tested on soil along building foundation with putting SHT11 sensor inside soil using biopory drilling machine. The length of drill is 120 cm with 3, 5 diameter. The sensor is placed 5 cm from the end of the bottom drilling pipe clamped with rubber and styrofoam. In the drilling pipe there is an air hole that function is for air from the soil got into the sensor. The measurement done in 1 day, in each deep 20, 40, 60, 80, 100, and 120 cm. The maximum air temperature inside soil is 27,60C in the depths 120 cm and the minimum is 23,30C in the depths 60 cm. The maximum air humidity inside soil is 96,8 % in the depths of 60 cm and the minimum is 31,4 % in the depths of 100 cm. The data result of measurement is shown on the 16x2 LCD and laptop, using interface software and automatically save the data into Excel and database.