High-temperature abrasive jet drilling system and drilling method
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An abrasive jet, high temperature technology, used in abrasives, thermal drilling, sputtering, etc.
Active Publication Date: 2020-06-19
CHINA PETROLEUM & CHEM CORP +1
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Specifically relates to a high temperature abrasive jet drilling system and drilling method
Method used
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preparation example Construction
[0103] 1. Preparation of transition layer
[0104] (1) Nozzle base material cleaning: Use ion beam to bombard the nozzle (the material is hard alloy). The furnace pressure is 0.1Pa, the Ar gas flow rate is 100sccm, the ion source is 0.5Kw, the magnetron frequency is 1Kw, and the negative bias voltage is 35V for 40min.
[0105] (2) Preparation of Ti metal transition layer: double Ti targets are used. The pressure in the furnace is 0.1Pa, the Ar gas flow rate is 100sccm, the ion source is 0.5Kw, the magnetron frequency is 1Kw, the target power is 1Kw, the negative bias voltage is 35V, and the time is 5min.
[0106] (3) Preparation of TiC transition layer: double Ti targets are used. The pressure in the furnace is 0.1Pa, the flow rate of Ar gas is 100sccm, CH 4 The gas flow is 10sccm, the ion source is 0.5Kw, the magnetron frequency is 1Kw, the target power is 1Kw, the negative bias voltage is 35V, and the time is 5min.
[0107] (4) Preparation of TiCN transition layer: doubl...
Embodiment 1
[0115] The high-temperature abrasive jet drilling system includes a surface pump unit 1, a microwave generator 2, a coiled tubing 3, a waveguide 4, a microwave antenna 6, a heating chamber 9, a temperature sensor 7, a pressure sensor 8, a high-temperature abrasive jet device 10, etc., combined with Accompanying drawing 2 further introduces the flow process of technology:
[0116] 1. Drain the well, wash the well, and prepare for the operation;
[0117] 2. Utilize the waveguide 4 to connect the microwave antenna 6 to the heating cavity 9 at the end of the coiled tubing 3;
[0118] 3. Turn on the surface pump unit 1, and use the coiled tubing 3 to pump water, microwave strong absorbent and abrasive particles into the heating chamber 9;
[0119] 4. Turn on the microwave generating device 2, and the microwave antenna 6 starts to radiate the water and microwave strong absorbent in the heating chamber 9. The internal temperature and pressure are monitored by the temperature sensor...
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Abstract
The invention relates to a high-temperature abrasive jet drilling system and a drilling method, and belongs to the field of petroleum exploration and development. The system consists of a ground pumpset, a microwave generating device, a coiled tubing, a waveguide tube, a microwave antenna, a heating cavity, a temperature sensor, a pressure sensor, a high-temperature abrasive jet device and the like. According to the drilling method, the actions of abrasive jet and rock thermal cracking are taken into comprehensive consideration, and high-temperature abrasive jet acts on shaft bottom rocks inconjunction with the principle of microwave heating, thereby realizing efficient rock breaking. Through the adoption of the method, the problems of the low rate of penetration, short service life of adrill bit, the poor rock breaking effect and the like for deep hard formation and high abrasiveness formation in the existing conventional drilling technology are solved, and strong support is provided for the efficient development of the deep oil and gas resources in China.
Description
technical field [0001] The invention relates to the field of petroleum exploration and development, and more specifically, to a high-temperature abrasive jet drilling system and a drilling method. Background technique [0002] At present, the old oilfields in the central and eastern part of my country have entered the late stage of development. The comprehensive water cut of the oil well has been greatly increased, and the production capacity has been gradually reduced. The remaining oil and gas resources in the complex superimposed basins in the west account for about 45% of the national total, and the proven rate is less than 20%, showing huge potential for exploration and development. Compared with the basins in eastern China, the oil and gas resources in the western basins are more concentrated in the deep strata (more than 4500m), accounting for about 80% of the oil and gas resources in the western complex superimposed basins. However, the rock in deep formations is m...
Claims
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