Liquid plunger driven type rubber bag collector for well logging

A current collector and driving technology, which is applied in the directions of measurement, wellbore/well components, earthwork drilling and production, etc., can solve problems such as misalignment of instruments, explosion of rubber balls, blockage of liquid inlet or infusion pipeline, and achieve operation And easy to use, prevent scratches, the effect is remarkable

Active Publication Date: 2016-08-10
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic horizontal well fluid production profile logging mainly adopts the flow logging method based on tractor transportation technology, and a new modular horizontal well flow logging method based on tubing transportation technology has been proposed in recent years; domestic production logging There are two main methods of collecting current in wells: umbrella type current collection method (CN 201020611183.8 ) and rubber ball type current collection method (CN201110347614.3). The umbrella type current collector has the advantage of high reliability. The collector is used in horizontal well logging methods, but due to the gap between the ribs of the collector umbrella and the casing and the impact of the instrument being not centered due to the weight of the logging instrument itself, the umbrella collector The leakage rate is too large, and it is impossible to accurately measure the fluid in various downhole sections of low-yield horizontal wells; the rubber ball collector has the advantage of high flow conce

Method used

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  • Liquid plunger driven type rubber bag collector for well logging
  • Liquid plunger driven type rubber bag collector for well logging
  • Liquid plunger driven type rubber bag collector for well logging

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1: Self-contained liquid plunger-driven rubber bladder current collector for logging. This device is mainly divided into three parts and a package shell, including bladder current collector short-circuit 1, and bladder current collector short-circuit 1 connection The plunger drive liquid storage chamber is shorted 2, and the plunger drive liquid storage chamber is shorted 2 is connected to the motor drive shorted connection 3 and each shorted tubing 4 is uniformly packaged, and the bladder current collector shorted connection 1 is connected with The centralizer 5, of course, is connected to the end of the well of the bladder collector short circuit 1. The centralizer 5 protects the rubber bladder 7 to the maximum and prevents the rubber bladder 7 from being scratched. On the other hand, when the device goes down the well, Righting the tubing 4; the bladder collector short 1 includes a fluid bypass nipple 6 and a rubber bladder 7. The rubber bladder 7 is connected ...

Example Embodiment

[0020] Embodiment 2: Further, in order to improve the practicability of the device and avoid bursting caused by a large amount of flushing liquid in an instant, an oil-filled sub-section 13 is connected between the fluid bypass sub-joint 6 and the liquid storage chamber 9, and the liquid-filling is short. The joint 13 is connected to the oil collecting sub joint 14.

Example Embodiment

[0021] Embodiment 3: Further, the fluid bypass sub-joint 6 is further explained for the embodiment, that is, the fluid bypass sub-joint 6 is provided with a fluid channel 15 which connects the liquid inlet and the flow direction. The logging tools of the previous stage of the flow device are short-connected and connected, thereby improving the high compatibility and applicability of the device.

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PUM

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Abstract

The invention provides a liquid plunger driven type rubber bag collector for well logging. The liquid plunger driven type rubber bag collector for the well logging can improve the reliability and increase the collecting degree, and is suitable for a horizontal well with low liquid productivity and low flow speed. A bag collector jointer comprises a fluid bypass nipple and a rubber bag, wherein the rubber bag is connected onto the outer side wall of an oil pipe, the fluid bypass nipple is connected to the inner side of the oil pipe, a liquid storage channel is formed in the fluid bypass nipple and communicates the rubber bag with a liquid storage cavity in a plunger driven liquid storage cavity jointer; the plunger driven liquid storage cavity jointer comprises the liquid storage cavity with an opening in one end and a liquid pushing piston for sealing the opening end of the liquid storage cavity, and the middle part of the liquid pushing piston is in threaded connection with a lead screw in a motor driven jointer; the motor driven jointer comprises a motor and the lead screw connected onto an output shaft of the motor. The liquid plunger driven type rubber bag collector for the well logging has remarkable in effect and is convenient to operate and use and high in practicability.

Description

technical field [0001] The invention belongs to the field of oil extraction equipment and relates to a current collector, in particular to a rubber leather bag current collector driven by a self-contained liquid plunger for well logging. Background technique [0002] At present, the fluid production profile logging technology of horizontal wells in foreign countries is mainly based on non-concentrating and continuous measurement, which is suitable for high-yield and self-flowing horizontal wells, but not suitable for the absolute majority of domestic horizontal wells with medium and low fluid production. Domestic horizontal well fluid production profile logging mainly adopts the flow logging method based on tractor transportation technology, and a new modular horizontal well flow logging method based on tubing transportation technology has been proposed in recent years; domestic production logging There are two main methods of collecting current in wells: umbrella type curre...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B33/10
CPCE21B33/10E21B47/00
Inventor 李雷刘兴斌孔维航孔令富李军谢贝贝王玉玲孔德明李英伟郑淑红王延军孙亮
Owner PETROCHINA CO LTD
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