New well drilling method for efficient rock breaking by means of heating power jet flow

A new method and thermal technology, applied in the direction of drilling with liquid/gas jet, can solve the problems of low rock breaking efficiency and insufficient bottom hole energy, and achieve the effects of good site adaptability, low drilling cost and high safety.

Active Publication Date: 2014-05-14
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

In this way, the key problems such as low rock breaking efficiency and insufficient energy at the bottom of the well are completely solved.

Method used

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  • New well drilling method for efficient rock breaking by means of heating power jet flow
  • New well drilling method for efficient rock breaking by means of heating power jet flow
  • New well drilling method for efficient rock breaking by means of heating power jet flow

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Embodiment Construction

[0033] The invention creatively proposes to apply thermal jet and rock pyrolysis technology to deep well hard formation drilling, and forms a complete set of construction scheme. It solves the key problems such as low rock-breaking efficiency in deep hard formations and insufficient energy at the bottom of the well. With the use of coiled tubing drilling technology, there is no need to replace the drill bit, which greatly saves the tripping time and reduces the wear of the pipe string. At the same time, the energy utilization rate of thermal jet rock breaking is high, and the non-contact rock breaking in deep hard formations can greatly increase the drilling speed and greatly shorten the drilling time. Thermal jet drilling can also increase the porosity and permeability of the near-wellbore zone, which is conducive to more efficient and effective mining in the later stage.

[0034] The system composition of thermal jet rock breaking drilling mainly includes: coiled tubing mac...

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Abstract

The invention relates to a new welling drilling method for efficient rock breaking by means of heating power jet flow, and a complete set of construction scheme. According to the system composition, a continuous coil tubing unit, an electric measuring instrument truck, a cable, an air injection pipeline, a fuel injection pipeline, a fuel reaction cavity, a heating power jet flow nozzle, a ground pump set and the like are included. According to the technology, on the basis of the principle that the continuous heated surfaces of rocks crack until the rocks are decomposed in a splitting mode, the heating power jet flow acts on the rocks on the deep well hard formation, the non-contact efficient rock breaking is achieved under heat transfer and impact force of high-temperature and high-pressure fluid media, and the energy utilization rate of the well bottom is improved; the technological process is simple, the continuous oil tube well drilling technology is combined, a drill bit does not need to be replaced, the time of the tripping operation is shortened, abrasion to a tubular column is reduced, and the cost of the drilling operation is reduced. According to the new welling drilling method for efficient rock breaking by means of heating power jet flow, the heating power jet flow technology is creatively guided into the continuous oil tube well drilling, popularization and application of the continuous tube technology are facilitated, and oil and gas resources are efficiently exploited.

Description

technical field [0001] The invention relates to the field of oil exploitation, and combines coiled tubing technology with thermal jet technology, which is a new drilling technology for realizing high-efficiency rock breaking. The invention utilizes the principle of thermal jet flow and rock thermal cracking to realize downhole non-contact rock breaking, and the rock breaking efficiency of deep well hard formations is much higher than that of conventional drilling. Background technique [0002] The oilfields in the central and eastern parts of my country have gradually entered the late stage of development, and about 40% of the remaining oil and gas resources are located in deep formations (>4500m). The super-large oil and gas fields discovered in recent years, such as Tarim, Northeast Sichuan, and Songliao Oilfields, are all located in deep formations. Therefore, the exploration and development of deep oil and gas has become a major strategic demand for my country's oil a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18
Inventor 宋先知李根生黄中伟王梦抒田守嶒王海柱史怀忠
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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