DOUBLE-INJECTION-PUMP CONTINUOUS INJECTION METHOD SUITABLE FOR PARTICLE-IMPACT DRILLING

WIPO Patent Application WO/2017/005216

A1

The present invention relates to the technical field of oil and gas drilling engineering. Disclosed is a double-injection-pump continuous injection method suitable for particle-impact drilling. The method comprises the following steps in sequence: a. a particle adding step: adding particles to a particle mixing hopper (4); b. a particle mixing step: pumping a slurry into the particle mixing hopper (4), thoroughly mixing the slurry with the particles; and c. a particle injection step: continuously injecting the mixture of the slurry and the particles into a well by a double-injection-pump continuous injection apparatus. In the present invention, the double-injection-pump continuous injection apparatus is adopted in the particle injection step, so that the adding and compression strokes are carried out alternately in an orderly manner, thereby ensuring the continuity of injection of the particles into the well, and effectively improving the efficiency of particle-impact drilling.

LI WEICHENG (CN)
YAO JIANLIN (CN)
CHEN XIAOBIN (CN)
CHEN LI (CN)
FENG MING (CN)
ZHOU GANG (CN)
LIU BIN (CN)
HE CHAO (CN)

PCT/CN2016/089441

January 12, 2017

July 08, 2016

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CCDC PETROLEUM DRILLING & PRODUCTION TECH CO LTD (CN)

E21B7/18; E21B21/01

WO2009099945A2

2009-08-13

CN104963631A	2015-10-07
CN105041214A	2015-11-11
CN204782762U	2015-11-18
CN102022078A	2011-04-20
CN202157747U	2012-03-07
US3968845A	1976-07-13
US4304609A	1981-12-08

XU, YIJI ET AL.: "Design of the Injection System for Double Plunger Particle Impact Drilling", CHINA PETROLEUM MACHINERY, vol. 41, no. 3, 31 March 2013 (2013-03-31), ISSN: 1001-4578

CHENGDU RUIDAO AGENT FIRM (GENERAL PARTNERSHIP) (CN)

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