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Abrasive jet cutting auxiliary tool for underwater reserved wellhead

A technology of abrasive jet cutting and auxiliary tools, which is applied in the direction of mining fluid, wellbore/well parts, earthwork drilling and production, etc., which can solve problems such as inability to apply, and achieve the effect of avoiding operating costs

Pending Publication Date: 2022-04-19
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantage that the abrasive jet cutting technology cannot be used in underwater wellhead cutting, and provide an auxiliary tool for underwater wellhead abrasive jet cutting, which can realize the application of abrasive jet cutting tools in underwater wellhead cutting. Efficiency and safety improvements in traditional subsea wellhead abandonment cutting mode

Method used

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  • Abrasive jet cutting auxiliary tool for underwater reserved wellhead
  • Abrasive jet cutting auxiliary tool for underwater reserved wellhead

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Embodiment

[0020] like figure 1 and figure 2 As shown, an auxiliary tool for underwater wellhead abrasive jet cutting includes an upper lock 1, a horn 2, an umbilical cable fixing hole 3, an auxiliary tool body 4, an auxiliary tool lifting point 5, a support plate 6, a drainage hole 8, Guide cylinder 9, lower lifting point 10 and lower lock 11;

[0021] The upper part of the auxiliary tool body 4 is a horn 2, which is used for guiding the abrasive jet umbilical cable 13;

[0022] The horn 2 is provided with an umbilical cable fixing hole 3 for fixing the abrasive jet umbilical cable 13;

[0023] The middle periphery of the auxiliary tool is provided with a support plate 6 that fits with the end face of the reserved wellhead;

[0024] An auxiliary tool lifting point 5 is arranged on the upper part of the support plate 6, which is used for auxiliary tool hoisting;

[0025] The lower part of the support plate 6 is provided with a guide cylinder 9 for inserting into the wellbore of the ...

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Abstract

The invention discloses an abrasive jet cutting auxiliary tool for an underwater reserved wellhead. The abrasive jet cutting auxiliary tool comprises an auxiliary tool body, a supporting plate, an upper lock and a lower lock. Underwater wellhead discarding cutting operation can be achieved by connecting an abrasive jet cutting tool, and high operation cost and large operation workload and operation risks caused by using a traditional dry and wet bin discarding mode are avoided.

Description

technical field [0001] The invention belongs to the technical field of drilling engineering, and in particular relates to an auxiliary tool for cutting abrasive jets for retaining wellheads underwater. Background technique [0002] As an emerging cutting technology, high-pressure abrasive jet cutting has obvious advantages in high efficiency and environmental protection. The large-scale application of this technology in the domestic petroleum industry is still in its infancy. At present, it is mostly used in offshore jackets and oil and gas well abandonment. After the offshore oil and gas field enters the abandonment stage, it is necessary to cut and recover production facilities such as wellheads and jackets from 4m below the mud surface. Before 2014, the commonly used abandonment cutting method in offshore shoals was the dry and wet warehouse abandonment mode, but this mode is more affected by offshore wind waves and tides. Big and not economical. With the continuous deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/12E21B43/114
CPCE21B29/12E21B43/114
Inventor 王兴旺司江舸孙慧铭刘占鏖
Owner CNOOC ENERGY TECH & SERVICES