Subsea tree cap running tool

A technology for underwater Christmas trees and feeding tools, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc. It can solve the problems of immature technology, unreasonable structure, high cost, etc., and achieve safe and reliable operation , Easy operation and simple structure

Inactive Publication Date: 2019-11-29
CHONGQING QIANWEI SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in offshore oil exploitation, the underwater environment and working conditions are complex and changeable, which brings a lot of inconvenience to the installation and maintenance of underwater Christmas tree caps
The underwater tree cap needs to be lowered for installation of the drill pipe, and the action function is realized through hydraulic drive or manipulator control during the lowering installation process. In this process, various tools are required to cooperate with each other to realize the connection and installation, which makes the installation difficult. Large, time-consuming, high cost, many uncontrollable factors, etc.
Moreover, the existing underwater tree cap feeding tools cannot meet the installation requirements of convenient use, reliable performance, and fast installation due to immature technology and unreasonable structure.

Method used

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  • Subsea tree cap running tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment one, such as Figure 2 to Figure 5 Shown:

[0052] The underwater Christmas tree cap feeding tool includes a tool body 1, the overall shape of the tool body 1 is a cylindrical structure, and the top of the tool body 1 in the height direction is a connecting part for connecting with a drill pipe;

[0053] It also includes a drive connection mechanism and a connection separation mechanism;

[0054] The middle part of the tool body 1 in the height direction is equipped with the drive connection mechanism, which is used to drive the actuation ring of the underwater tree cap, so that the underwater tree cap and the underwater horizontal tree are locked Connected; the driving connection mechanism includes a driving piston 7, a piston driving structure and a temporary stop structure before driving, the inner surface of the driving piston is connected with the outer surface of the tool body 1 by a sliding fit, and the driving piston is in its own The highest positi...

Embodiment 2

[0083] Embodiment two, not shown in the figure:

[0084] The differences between this embodiment and Embodiment 1 are:

[0085] The piston driving structure is a hydraulic driving structure, and the hydraulic driving structure can form an annular cavity by recessing the surface of the tool body 1, and the inner surface of the driving piston protrudes radially to form a convex ring, and the convex ring The inner surface of the tool body 1 is connected with the side wall of the annular chamber in a sliding and sealing fit and divides the above hydraulic chamber into two hydraulic chambers. The tool body 1 is provided with hydraulic ports respectively communicating with the above two hydraulic chambers.

[0086] The temporary limit structure before driving includes a countersunk hole and a limit screw; the outer surface of the driving piston is radially penetrated with the countersunk hole, and when the driving piston is at the highest position of its own driving stroke, the The...

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Abstract

The invention discloses an underwater tree cap feeding tool. The underwater tree cap feeding tool comprises a tool body, a drive connection mechanism and a connection and separation mechanism; an overall shape of the tool body is of a cylindrical structure, and the top of the tool body in the height direction is a connecting part for being connected with a drill rod; the drive connection mechanismis installed at the middle part of the tool body in the height direction in a sleeving mode, the drive connection mechanism is used for driving an actuation ring of an underwater tree cap, so that the underwater tree cap is connected with an underwater horizontal type Christmas tree in a locked mode; the drive connection mechanism includes an actuating piston, a piston driving structure and a temporary limiting structure before driving; the connection and separation mechanism is installed at the bottom part of the tool body in the height direction in a sleeving mode, and the connection and separation mechanism is used for connecting with or separating from the underwater tree cap; and the connection and separation mechanism includes a lower baffle ring, a locking ring, a drive ring, and adriving structure for the drive ring. The underwater tree cap feeding tool has the advantages of simple structure, reliable performance and convenient use, and is suitable for being popularized and used.

Description

technical field [0001] The invention belongs to the field of installing tools for underwater horizontal Christmas trees, in particular to a feeding tool for underwater horizontal Christmas trees with a built-in Christmas tree cap. Background technique [0002] The subsea tree cap is a key part of the assembly of the subsea horizontal tree body, and the subsea tree cap is used to provide a sealed barrier for the wellbore and the external environment above the tubing hanger. [0003] The notification number in the prior art is: the patent of CN203822239U discloses a kind of "built-in christmas tree cap for underwater horizontal christmas tree", the "built-in christmas tree cap for underwater horizontal christmas tree" (see the attached figure 1 (shown) includes the tree cap body 7 arranged above the tubing hanger 01 in the tree body 00 and under the anti-slag cap. The outer middle part of the tree cap body 7 is fixed with a protruding hole protruding from the outer surface of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/04E21B33/035
CPCE21B23/04E21B33/035
Inventor 李荣叶天源石静龚光辉杜振伟张高翔黄荣吉
Owner CHONGQING QIANWEI SCI & TECH GRP
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