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Hydraulic pumping downhole throttling device and use method thereof

A hydraulic pump and choke technology, which is applied in the field of throttling and depressurization in natural gas production, can solve the problems of wire speed control of downhole choke setting, reduced drainage and gas production effect, and limited sweeping range, and achieves reliable setting. , high reliability, good use effect

Active Publication Date: 2019-03-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Restricted by the delivery process, downhole choke structure and materials, downhole chokes are currently only installed in the wellbore of the vertical well section, and the sweeping range is limited. With the lengthening of the horizontal section, the downhole choke installed in the vertical well section The effect of drainage and gas recovery decreases exponentially, especially when the water production is large in the middle and late stages of development, the effect is almost ineffective
In addition, in the process of putting the well test steel wire into the downhole choke, improper control of the speed of the steel wire will easily lead to the midway setting of the downhole choke

Method used

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  • Hydraulic pumping downhole throttling device and use method thereof
  • Hydraulic pumping downhole throttling device and use method thereof
  • Hydraulic pumping downhole throttling device and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 with figure 2 A hydraulic pumping type downhole choke is shown, which at least includes a central pipe 15, and the outer wall of the central pipe 15 is sequentially sleeved with a second seat ring 13, a second slip 12, and a second rubber cartridge seat from top to bottom. 11. The second short rubber cylinder 10, the long rubber cylinder 9, the first short rubber cylinder 8, the first rubber cylinder seat 7, the first slip 6, and the first seat ring 5, which are socketed on the adjacent parts outside the central tube 15 The parts are in contact with each other. The upper end of the second seat ring 13 is connected with the second nut 14, and the lower end of the first seat ring 5 is connected with the first nut 4. The second nut 14 and the first nut 4 are respectively connected with the central tube 15. Connect with threads; the outer wall of the bottom end of the center pipe 15 is sleeved with a sand-proof cover 1, the inner diameter of the bottom en...

Embodiment 2

[0029] Such as figure 1 The hydraulic pumping type downhole choke shown is different from Embodiment 1 in that: the sand control cover 1 is in the shape of a barrel and the bottom end is hemispherically closed, and the inner diameter of the upper end of the sand control cover 1 is the same as that of the center pipe 15 The outer diameter of the sand control cover 1 is matched with the outer diameter, and the upper end of the sand control cover 1 is sleeved on the outer side wall of the central tube 15, and strip-shaped through holes are arranged side by side on the side wall of the sand control cover 1 .

[0030] The setting of the sand control cover 1 during actual use can make the present invention eliminate the interference of mud and sand, and be in a good operating state for a long time.

Embodiment 3

[0032] Such as figure 1 The hydraulic pumping type downhole choke shown is different from Embodiment 1 in that: the choke nozzle includes a large choke nozzle 3 and a small choke nozzle 2, a large choke nozzle 3 and a small choke nozzle 2 are sequentially connected to the inner side wall of the bottom end of the central tube 15 from top to bottom, and the lower end surface of the small throttle nozzle 2 is flush with the end surface of the bottom end of the central tube 15 .

[0033] In actual use, the large throttle nozzle 3 and the small throttle nozzle 2 are set so that when the throttle nozzle with a larger inner diameter needs to be replaced, the large inner diameter throttle nozzle is pushed down to drive it into the sand protection cover, and then it can be started. The small throttle nozzle expands the scope of application of the present invention.

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PUM

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Abstract

The invention belongs to the technical field of throttling and depressurizing in natural gas production, especially related to a hydraulic pumping downhole throttling device. Through arrangement of asand control cover and throttling nozzles and symmetric arrangement of seat rings, clips, rubber sleeve seats and short rubber sleeves at the two ends of a long rubber sleeve as well as arrangement oflowering tools connected to the top of the throttling device, the underground throttling device could be installed and used not only in the vertical section of a shaft, but also in the horizontal section, expanding the range of application of underground throttling and achieving excellent effect. By organic integrated arrangement of the lowering tools including a cable, a cable end, a magnetic orientator, a weighting lever, an ignition head and a setting tool, not only could the position of lowering be accurately controlled during the process of lowering the throttling device into the well, but also the phenomenon that the throttling device is set halfway due to improper lowering is avoided in the halfway of lowering. Therefore, the throttling device is highly reliable. The hydraulic pumping downhole throttling device is made of composite materials, so that in the later stage of service, the hydraulic pumping downhole throttling device could be rapidly dismantled by drilling and grinding.

Description

technical field [0001] The invention belongs to the technical field of throttling and pressure reduction in natural gas production, and in particular relates to a hydraulic pumping type downhole throttle and its use method. Background technique [0002] The downhole throttling technology is a kind of technology that the throttling and pressure reduction process of natural gas occurs in the wellbore of the gas well through the downhole throttle. Gas technology, so it is widely used in gas well production. [0003] At present, the slip-type downhole choke is widely used in gas fields. It is delivered to the predetermined position of the wellbore through the well test wire operation, fixed on the oil pipe by the slip on the choke, and sealed by the rubber tube. Annular space of inner wall and restrictor. Restricted by the delivery process, downhole choke structure and materials, downhole chokes are currently only installed in the wellbore of the vertical well section, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12E21B21/00E21B19/10E21B33/127
CPCE21B19/10E21B21/00E21B33/127E21B43/12
Inventor 姜勇张安康桂捷张宏福刘锐王效明张家富海显莲同松高伟
Owner PETROCHINA CO LTD