Methodical issues of evaluating methane capacity in small Problems of hydrodynamic methods of wells drilling and the main directions in their solution
The main aim of the study is to found out the most effective drilling method in hard rocks and perspective directions of future researches. The methods used in the study are the analysis and generalization of theoretical and experimental results. The results. The research proves the perceptivity of...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1539 |
| Summary: | The main aim of the study is to found out the most effective drilling method in hard rocks and perspective directions of future researches. The methods used in the study are the analysis and generalization of theoretical and experimental results. The results. The research proves the perceptivity of hydrodynamic methods of rock destruction. The authors developed the classification of hydrodynamic rock destruction methods based on the character of impact on the bottom hole. In accordance with the developed classification, all hydrodynamic methods are divided into 3 groups: erosive, abrasive and combined cutting. The analysis of hydrodynamic methods revealed that jetting-abrasive method provided by pellet impact drilling is the most effective while drilling hard rocks. This method is realized by implementation of ejector that realizes continuous circulation of pellets in bottom hole zone up to their full deterioration. The authors analyzed the operation mode of pellet impact drill bit, as well as theoretical and experimental researches. The pellet impact drilling advantages and disadvantages that limit its implementation were determined. As a result, the study provided a new trend for current researches, namely: perfection of pellet impact drill bit construction, search for drilling rate increase and reduction of energy for rock destruction on the bottom hole, development of technical means for pellet impact drilling with increasing bit run speed, development of well flushing-out program, research of drilling fluid influence for effectiveness of this method of drilling, study of slime grain size. |
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| ISSN: | 2500-1019 2413-1830 |