CN201170065Y

CN201170065Y - Seal assembly of sea drill platform current divider

Info

Publication number: CN201170065Y
Application number: CNU2008200742069U
Authority: CN
Inventors: 唐建华; 祖利民
Original assignee: CANGZHOU DETAIKE DRILLING EQUIPMENT Co Ltd
Current assignee: CANGZHOU DETAIKE DRILLING EQUIPMENT Co Ltd
Priority date: 2008-03-26
Filing date: 2008-03-26
Publication date: 2008-12-24
Anticipated expiration: 2018-03-26

Abstract

The utility model discloses a sealing assembly for a diverter on an offshore drilling platform, comprising a C-shaped rubber sealing ring (1), sprags (2), and a supporting ring (3). The sprags (2) are respectively positioned at the two sides of the rubber sealing ring (1). The supporting ring (3) is positioned inside the C-shaped rubber sealing ring (1). The assembly is characterized in that the two ends of the C-shaped rubber sealing ring (1) are respectively provided with a semicircular protrusion. The sprag (2) is provided with a semicircular ring groove which is corresponding to the stopping ring (2). The cross section of the sprag (3) is T-shaped, and the inner cavity of the C-shaped rubber sealing ring (1) is filled by the cross section. The internal of the assembly is not impacted by the cavity of the rubber sealing ring. The sealing ring can be accurately arranged through axial displacement. The lip edge is not overturned. The shape of the sealing ring can be kept. The shape of the lip at the inner side of the sealing ring can be kept jointly with a protecting board at the outer side, and thus long-term reliable operation of the sealing assembly can be ensured.

Description

Marine drilling platform current divider black box

Affiliated technical field

The utility model belongs to marine drilling facility parts, is meant a kind of black box on the marine drilling platform current divider that is used for especially.

Background technology

The brief introduction of marine drilling platform current divider: the marine drilling platform current divider is positioned at the rig floor bottom, the highest point of the drilling mud circulating system.Current divider mainly is made up of mud circulating system and sealing system, and sealing system is positioned at the top of mud circulating system.The main effect of current divider has 2: 1) in the normal drilling process, the mud that pit shaft returns is assigned to mud disposal system by current divider, the mud circulation when finishing drilling well.2) in drilling process, run into shallow gas, need close the current divider packing unit at once, prevent that gas from overflowing and initiation fire, close mud circulating system simultaneously, select left string or right string relief line to carry out open flow according to wind direction.Avoid accident to take place.Current divider mainly by the shell body that is fixed on the rig floor bottom be installed on that the shell component two large divisions forms in the current divider in the shell body.Because the circulatory mediator during drilling well is to be returned by the inner casing center of current divider, the side outlet outer by shell body distributes.So between inner housing and shell body, need upper and lower two seals, leak with the circulatory mediator that prevents drilling well.The marine drilling platform current divider is domestic still not to have manufacturer production at present.The patent that similar structures is abroad arranged, it is the rubber seal ring by band epipharynx limit, 1 two ends, the gasket ring of 2 protection usefulness is formed.The major defect of this structure is: 1) be not easy to install, sealing ring need move axially when installing, but because the high resiliency and the low rigidity of rubber are relatively more difficult during installation, causes the interior lip upset easily.2) interior lip local distortion, can cause seal failure after lax.

Summary of the invention

The purpose of the utility model is to overcome the above-mentioned deficiency of prior art, and a kind of marine drilling platform current divider black box is provided, and it is simple in structure, and long service life is effective.

For reaching above-mentioned purpose, the utility model is taked following technical scheme: the utility model includes: C shape rubber seal, back-up ring, bracing ring.Back-up ring lays respectively at the both sides of C shape rubber seal, and bracing ring is positioned at the inside of C shape rubber seal.It is characterized in that: there is half-circle projection at the two ends of C shape rubber seal, the semicircle annular groove corresponding with it arranged on back-up ring, and the section of bracing ring is a T shape, has filled the internal cavities of C shape sealing ring, its endoporus cooperates with the sealing diameter of axle, and the lip edge joint of the both sides endoporus of T shape and C shape sealing ring touches.

The utility model is taked technique scheme, has following beneficial effect: 1, inside does not have the influence of rubber seal cavity, and sealing ring axial displacement can accurately put in place when installing, and can not overturn in the lip limit.The shape that 2, can keep sealing ring avoids sealing ring owing to relaxing that factors such as aging, variations in temperature, erosion medium resistance cause, and keep the inboard lip shape of sealing ring simultaneously jointly with outer side guard board, thereby the assurance black box is worked stably in a long term.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the utility model structure diagram.

Mark among the figure: 1-C shape rubber seal, 2-back-up ring, 3-bracing ring.

The specific embodiment

By shown in Figure 1, the utility model includes: C shape rubber seal 1, back-up ring 2, bracing ring 3, back-up ring 2 lays respectively at the both sides of C shape rubber seal 1, bracing ring 3 is positioned at the inside of C shape rubber seal 1, it is characterized in that: there is half-circle projection at the two ends of C shape rubber seal 1, the semicircle annular groove corresponding with it arranged on back-up ring 2, the section of bracing ring 3 is a T shape, fill the internal cavities of C shape rubber seal 1, its endoporus cooperates with the sealing diameter of axle, and the lip edge joint of the both sides endoporus of T shape and C shape sealing ring touches.

When the utility model uses bracing ring is installed on the inside of C shape rubber seal, back-up ring is installed on the both sides of C shape rubber seal respectively, the assembly after the installation moves axially as global facility, is installed to the sealing position and gets final product.

Claims

1, a kind of marine drilling platform current divider black box, it includes: C shape rubber seal (1), back-up ring (2), bracing ring (3), back-up ring (2) lays respectively at the both sides of C shape rubber seal (1), bracing ring (3) is positioned at the inside of C shape rubber seal (1), it is characterized in that: there is half-circle projection at the two ends of C shape rubber seal (1), the semicircle annular groove corresponding with it arranged on back-up ring (2), and the section of bracing ring (3) is a T shape, fills the internal cavities of C shape rubber seal (1).