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An underwater Christmas tree cap

An underwater Christmas tree and Christmas tree technology, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., can solve problems such as insufficient service life, high cost, and complex structure, and achieve low production cost, The effect of convenient operation and simple structure

Active Publication Date: 2015-11-18
BAOJI PETROLEUM MASCH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an underwater Christmas tree cap, which solves the problems of complex structure, high cost and insufficient service life in the prior art

Method used

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  • An underwater Christmas tree cap
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  • An underwater Christmas tree cap

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] refer to figure 1 , figure 2 The structure of the device of the present invention is to include a housing 1, the lower end of the housing 1 is in the shape of a bell mouth, the housing 1 is seated (or covered) on the upper edge of the Christmas tree body 28 downwards, and the upper surface of the housing 1 is The end cover 3 is fixedly installed (the embodiment is fixedly connected by screw I17), the lifting ring 4 is installed on the end cover 3 (the embodiment is fixedly connected by the nut 2), and a set of exhaust air is arranged in the opening on the upper surface of the housing 1 In the valve assembly, a set of locking mechanisms are respectively provided at 180° relative positions (symmetrical along the diameter) between the housing 1 and the tree body 28, and the locking mechanisms are outwardly connected to the indicator rod...

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Abstract

The invention discloses an underwater Christmas tree cap. The underwater Christmas tree cap comprises a shell, the shell is seated on the upper end edge of a Christmas tree body downwards, a set of exhaust valve assembly is installed in an open hole in the upper surface of the shell, 180-degree relative positions between the shell and the Christmas tree body are respectively provided with a set of locking mechanism, the locking mechanisms are connected with indication rods outwards, and then the indication rods are fixedly connected with ROV handles. The inside of the shell is communicated with a pipeline outwards, and the pipeline is communalized with a ROV plug through a female joint in a matched mode. The underwater Christmas tree cap is locked on the Christmas tree body through a ROV operation locking device, isolation of sea water is achieved, the sea water is prevented from corroding the inside of the Christmas tree, chemical agent is filled into the Christmas tree, and secondary locking of an oil-pipe hanger is achieved.

Description

technical field [0001] The invention belongs to the technical field of offshore oil and gas drilling equipment, and relates to an underwater Christmas tree cap. Background technique [0002] In the process of offshore deepwater oil exploration and development, the underwater Christmas tree is one of the key equipment. After the subsea tree is completed, the tree cap needs to be installed. The Christmas tree cap is locked on the top of the Christmas tree, which can effectively isolate the sea water, realize the secondary locking of the tubing hanger, and can inject chemicals into the Christmas tree. Since the advent of the Christmas tree cap, the structure of the Christmas tree cap has developed in a variety of forms. There are different structural forms according to the situation of the Christmas tree and the way of running, but it has the disadvantages of complex structure, high cost and insufficient service life. Contents of the invention [0003] The purpose of the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/035
Inventor 杨虎刘文霄王定亚
Owner BAOJI PETROLEUM MASCH CO LTD
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