Hydraulic spinning underwater pressure double drill trepanning device

A hydraulic and water inlet technology, used in boring/drilling, drilling/drilling equipment, manufacturing tools, etc.

Active Publication Date: 2017-01-04
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to effectively solve the problem of underwater non-stop drilling of submarine pipelines and overcome the defects and deficiencies of the existing pressurized drilling technology when it is

Method used

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  • Hydraulic spinning underwater pressure double drill trepanning device
  • Hydraulic spinning underwater pressure double drill trepanning device
  • Hydraulic spinning underwater pressure double drill trepanning device

Examples

Experimental program
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Example Embodiment

[0035] in Figure 1 ~ Figure 3 The hydraulic self-spinning underwater double-drilling hole-opening device is composed of a hole-opening assembly 1, a hydraulic feed system 2, a two-way stopper 3, a self-centering device 4, a sealing assembly 5, a double drilling tool 6 and The opening control system is composed. Before the underwater pressurized double-drilling hole-opening device is assembled, the support cylinder of the hole-opening assembly 1, the base cylinder of the bidirectional stopper 3, the centering body of the self-centering device 4, and the outer surface of the main part of the sealing assembly 5 Carry out spray paint anticorrosion treatment respectively. When the underwater pressurized double-drilling hole-opening device is assembled, the lower self-centering device 4 and the sealing assembly 5 are sequentially sleeved on the hollow drill rod of the hole-making assembly 1, and the guide pattern of the hole-making assembly 1 is ensured. The key and the bushing of...

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PUM

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Abstract

The invention provides a hydraulic spinning underwater pressure double drill trepanning device which is applied to submarine pipeline nonstop trepanning operation. The hydraulic spinning underwater pressure double drill trepanning device is organically combined with a submarine pipeline connection device; a hydraulic feeding system provides axial propelling power according to a hydraulic multi-power feeding mechanism and realizes the effect of hydraulic spinning of a double drill cutter by depending on a guide mechanism; a trepanning assembly provides trepanning power and transmits the trepanning power to the double drill cutter through a rotating hollow drill rod; automatic centering in a spinning process of the hollow drill rod is ensured by a self-centering device according to an automatic centering mechanism; the double drill cutter adopts an inner drill bit and an outer drill bit which are arranged coaxially; pressure double drill trepanning operation including inner drill location first and outer drill trepanning later is carried out on a submarine pipeline; a two-way limiter realizes the effect of automatic two-way limiting in a drill bit trepanning process according to an upper and lower reversible locking mechanism; the sealing in a spinning process of the hollow drill rod is ensured by a seal assembly according to a packing and labyrinth multiple seal technology; and a trepanning control system remotely and automatically regulate and control an overpressure working condition of the seal assembly during operation.

Description

technical field [0001] The present invention relates to a device used for tapping holes in submarine pipelines under pressure in an underwater production system, in particular to a hydraulic spin-in-pressure double-drill tapping device and a tapping method thereof under the condition of underwater non-stop operation . Background technique [0002] Offshore oil and gas medium and other logistics transportation is one of the most important research contents in the offshore engineering development plan. As a special form of offshore oil and gas transportation development solution, the underwater subsea pipeline drilling technology under pressure can greatly reduce the investment cost of oil and gas field development. It provides new technical support for the development of deep water oilfields and marginal oilfields. [0003] At present, foreign underwater drilling technology has developed from shallow sea pressure drilling to deep water operation, which ensures the smooth pro...

Claims

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Application Information

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IPC IPC(8): B23B41/08F16L41/04
CPCB23B41/00F16L41/04
Inventor 刘新福周超刘春花王德祥王国栋吴建军
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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