Coiled tubing speed tubular column suspending and sealing device

Abstract

The invention discloses a coiled tubing speed tubular column suspending and sealing device. The coiled tubing speed tubular column suspending and sealing device comprises a body component, a top sealing component, a slip component, an unlocking mechanism and a bottom sealing component. The top sealing component comprises a guide nut, a top sealing ring and an O-type sealing ring. The body component comprises a suspending body, a slip stimulating pin and a limiting protection ring. The slip component comprises an elastic slip check ring installed in a suspending hole, a slip base and multiple pieces of slips. The unlocking mechanism comprises a sealing bush, a support sleeve, an unlocking piston and an unlocking one-way valve. The bottom sealing component comprises an upper sealing ring, anupper piston, a lower piston and a lower sealing ring which are installed in a bottom sealing cavity from top to bottom. The coiled tubing speed tubular column suspending and sealing device is capable of rapidly and stably suspending a coiled tubing speed tubular column without an operating window, reliably sealing, rapidly and effectively unlocking, and improving working efficiency.

Description

technical field [0001] The invention relates to the technical field of coiled tubing velocity strings in the oil drilling industry, in particular to a coiled tubing velocity string suspension sealing device. Background technique [0002] With the development of coiled tubing technology, the use of coiled tubing as a completion string to effectively avoid or slow down the impact of bottomhole fluid accumulation on later production has been more and more used in low pressure and low production gas wells. However, in actual use, there are mainly the following shortcomings: [0003] 1. The slips cannot be fixed effectively, and the coiled tubing will slide upward and vibrate due to the influence of the pressure and air flow in the well. Due to the lack of effective fixation of the slip hanger, it is very easy to cause loosening, and even cause the coiled tubing to fall off, resulting in accidents. [0004] 2. There is only one set of sealing components, and the sealing reliabi...

AI Technical Summary

Problems solved by technology

[0003] 1. The slips cannot be effectively fixed, and the coiled tubing will slide upward and vibrate due to the influence of the pressure and air flow in the well

Due to the lack of effective fixation of the slip hanger, it is very easy to cause loosening, and even cause the coiled tubing to fall off, resulting in accidents

[0004] 2. There is only one set of sealing components, and the sealing reliability is poor

After the coiled tubing is suspended, it is necessary to cut the coiled tubing, which has only one seal with the natural gas in the well. Once the gas in the well leaks, it will bring great hidden dangers to the safety of the wellhead operators.

[0005] 3. After the coiled tubing is put in place, it is necessary to configure an operation window to lower the slips. The operation is complicated, time-consuming and labor-intensive

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