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Pneumatic drill horizontal well annulus cuttings simulation device

A simulation device and horizontal well technology, which is applied in the direction of earthwork drilling, wellbore/well components, etc., and can solve problems such as high resistance, stuck pipe, high torque of the drill string, etc.

Active Publication Date: 2017-05-31
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accumulation of cuttings in the annulus is likely to cause high torque and high resistance of the drill string, and even pipe sticking. In order to solve the above problems, the mechanism of cuttings migration in horizontal wells has become an urgent research topic

Method used

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  • Pneumatic drill horizontal well annulus cuttings simulation device
  • Pneumatic drill horizontal well annulus cuttings simulation device
  • Pneumatic drill horizontal well annulus cuttings simulation device

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as Figure 1~3 As shown, an air-drilling horizontal well annular rock-carrying simulation device includes a gas supply part, a cuttings supply part, a downhole annular space simulation part, a water supply part, a separation recovery part and a data acquisition part. It is characterized in that: the air supply part is composed of a fan 1, a steel pipe 2, a vortex flowmeter 3 and a butterfly valve 4 connected in sequence, and the cuttings supply part is composed of a sand storage tank 6, a rotary valve 7, a frequency converter 5, and an acceleration chamber 26 and the feeding support 27 are composed from top to bottom, and the downhole annulus simulation part is composed of glass pipe 11, PVC pipe 14, PVC drill pipe joint 12, rolling bearing 17, rotating handle 18, adjusting bolt 32, rubber curtain 30, pipe The bracket 13 and the adjustable bracke...

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Abstract

The invention relates to a simulation device used for simulating migration of horizontal well annulus rock cuttings in a petroleum pneumatic drill. The simulation device comprises an air feed part, a rock cuttings supplying part, a downhole annulus simulation part, a water supplying part, a separation and recycle part and a data acquisition part. According to the simulation device used for simulating migration of the horizontal well annulus rock cuttings in the petroleum pneumatic drill, air rock cuttings migration experiments can be conducted under a low pressure circumstance, visualized observation of the migration of the air rock cuttings can be conducted, and the rock cuttings migration situations under various factors of working conditions including effluent of water in a stratum can be simulated; meanwhile, through the separation and recycle part of the simulation device, the rock cuttings in the simulation experiments can be repeatedly utilized.

Description

technical field [0001] The invention relates to an experimental device for simulating oil-air drilling, which is an annular rock-carrying simulation device for air-drilling horizontal wells capable of visual observation. Background technique [0002] In the process of oil drilling, air drilling technology is often used in order to increase the ROP, reduce leakage, prolong the life of the drill bit, reduce sticking, improve the formation evaluation effect, reduce formation damage, and earlier oil and gas production. Air drilling is a drilling technique that uses air-based fluid instead of drilling fluid under controllable conditions to form a negative pressure difference at the bottom of the well. Due to the low air density and low viscosity, when air is used as the rock-carrying medium, the cuttings migration effect is poor. In addition, when the formation is exposed to water, the bonding of clay cuttings also brings a burden to the cuttings migration. Air drilling has many...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 祝效华刘骉毛宇
Owner SOUTHWEST PETROLEUM UNIV
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