CN206144523U

CN206144523U - Two overhead paddle check valves

Info

Publication number: CN206144523U
Application number: CN201621197289.1U
Authority: CN
Inventors: 阚红砖; 阚正玉
Original assignee: TIANJIN HUIZHU PETROLEUM EQUIPMENT TECHNOLOGY Co Ltd
Current assignee: TIANJIN HUIZHU PETROLEUM EQUIPMENT TECHNOLOGY Co Ltd
Priority date: 2016-11-04
Filing date: 2016-11-04
Publication date: 2017-05-03
Anticipated expiration: 2026-11-04

Abstract

The utility model relates to an oil well drilling and production technology field especially relates to a two overhead paddle check valves, including top connection, lower clutch, upper sealing seat, upper seal dish, go up spacing pointer, go up the pointer seat, lower seal seat, lower seal dish, spacing pointer and pointer seat down, the top connection with the lower clutch is connected, it sets up to go up the pointer seat upper sealing seat's below, upper seal dish overlap joint is in on going up the pointer seat, the upper portion of upper seal dish with upper sealing seat's lower part cooperation, the lower seal seat sets up go up the lower part of pointer seat, the pointer seat is fixed down the below of lower seal seat, the lower seal dish is located the lower seal seat with between the pointer seat, lower seal dish overlap joint is in down down on the pointer seat. This device design is reasonable, makes portably two -stage baffle mutual independence for the prevention go into under the tubular column or the shaft bottom liquid when retrieving on scurry and to realize reliable sealedly, avoided single baffle to seal insecure characteristics.

Description

Double flapper check valves

Technical field

This utility model is related to oilfield drilling and production technology field, more particularly to a kind of pair of flapper check valve.

Background technology

Oil well casing causes sleeve pipe leakage phenomena occur because of reasons such as cementing quality, connection screw thread, ground movement, corrosions, Oil supply well measure construction brings unfavorable factor and affects crude output.Once leakage situation occurs in the non-payzone of oil well, implementing to repair Leakage points be must determine before multiple, now verify that the method for casing leakage point typically adopts packer, in payzone with upper bit closing oil Set annular space, is verified to sleeve pipe by sleeve pipe pressuring method.But existing a few money packers are tested in set work progress in enforcement, There is unfavorable factor in varying degrees, causes construction to have some setbacks, it is impossible to accurately judge leak position problem.

For the possibility for preventing from altering on shaft bottom liquid when entering under tubing string or reclaiming, install all on instrument in prior art , to prevent from altering on the liquid of shaft bottom, existing check valve sealing is poor for one check valve.

Utility model content

The purpose of this utility model is to overcome the shortcomings of above-mentioned technology, and provides a kind of pair of flapper check valve, is improved The sealing of check valve.

This utility model for achieving the above object, is employed the following technical solutions：A kind of pair of flapper check valve, its feature exist In：Including top connection, lower contact, upper seal support, upper seal disc, upper limit bit pointer, upper hand rest, bottom sealing socket, lower seal disc, Lower limit bit pointer and lower hand rest；The top connection is connected with the lower contact, the upper seal support be arranged on it is described under connect Head in and seal engagement therewith, the upper hand rest is arranged on the lower section of the upper seal support, and the upper seal disc is overlapped on institute State on hand rest, the top of upper seal disc is coordinated with the bottom of the upper seal support, and the upper limit bit pointer is hinged on described Coordinate on upper hand rest and with the bottom of the upper seal disc；The bottom sealing socket is arranged on the bottom of the upper hand rest, institute The lower section that lower hand rest is fixed on the bottom sealing socket is stated, the lower seal disc is located at the bottom sealing socket and the lower hand rest Between, the top of lower seal disc is coordinated with the bottom of the bottom sealing socket, and the lower seal disc is overlapped on the lower hand rest, The lower limit bit pointer is hinged on the lower hand rest and is coordinated with the bottom of the lower seal disc.

The beneficial effects of the utility model are:Relative to prior art, this device is reasonable in design, and manufacture is easy, low cost, The consuming of labour force can be reduced, cost of labor is reduced, the automated production of vast scale can be realized.Two-stage baffle plate is mutually only It is vertical, can realize reliably sealing for preventing to alter on shaft bottom liquid when entering under tubing string or reclaiming, it is to avoid single guard seal Insecure feature.

Description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is working state schematic representation of the present utility model.

Specific embodiment

Below in conjunction with the accompanying drawings and preferred embodiment describes specific embodiment of the present utility model in detail.In this utility model Description in, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", "front", "rear", "left", "right", " vertical ", " water It is flat ", " top ", " bottom " " interior ", the orientation of the instruction such as " outward " or position relationship based on orientation shown in the drawings or position relationship, be only It is to describe for the ease of describing this utility model and simplifying, rather than indicates or imply that the device or element of indication there must be spy Fixed orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.

As shown in Figure 1 to Figure 2, it is a kind of pair of flapper check valve, including top connection 1, lower contact 2, upper seal support 3, upper close Closing disk 4, upper limit bit pointer 5, upper hand rest 6, bottom sealing socket 7, lower seal disc 8, lower limit bit pointer 9 and lower hand rest 10；Institute State top connection to be connected with the lower contact, during the upper seal support is arranged on the lower contact and seal engagement therewith, it is described on Hand rest is arranged on the lower section of the upper seal support, and the upper seal disc is overlapped on the upper hand rest, upper seal disc it is upper The bottom of portion and the upper seal support coordinates, the upper limit bit pointer be hinged on the upper hand rest and with the upper seal disc Bottom coordinate；The bottom sealing socket is arranged on the bottom of the upper hand rest, and the lower hand rest is fixed on the lower sealing Seat lower section, the lower seal disc be located between the bottom sealing socket and the lower hand rest, the top of lower seal disc with it is described The bottom of bottom sealing socket coordinates, and the lower seal disc is overlapped on the lower hand rest, and the lower limit bit pointer is hinged on described Coordinate on lower hand rest and with the bottom of the lower seal disc.When suppressing, liquid is entered from top connection 1, on liquid-driving, Lower seal disc 4,8 is moved down, meanwhile, upper and lower limit bit pointer 5,9 limits seal disc displacement and is difficult excessive, and such liquid is smooth Pass through.

In order to prevent liquid from scurrying out upwards, when liquid enters fashionable from lower contact 2, the upper and lower seal disc 4 of liquid-driving, on 8 Move, seal disc is contacted with seal receptacle, form sealing, while moving on spacing pointer, hold seal disc, prevent liquid from passing through.

This device is reasonable in design, and manufacture is easy, low cost, can reduce the consuming of labour force, reduces cost of labor, can Realize the automated production of vast scale.Two-stage baffle plate is separate, for preventing shaft bottom liquid when entering under tubing string or reclaiming On alter and can realize reliable sealing, it is to avoid the insecure feature of single guard seal.

The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and Retouching also should be regarded as protection domain of the present utility model.

Claims

1. a kind of pair of flapper check valve, it is characterised in that：Including top connection, lower contact, upper seal support, upper seal disc, the upper limit Bit pointer, upper hand rest, bottom sealing socket, lower seal disc, lower limit bit pointer and lower hand rest；The top connection with it is described under connect Head connection, during the upper seal support is arranged on the lower contact and seals engagement therewith, and the upper hand rest is arranged on described The lower section of seal receptacle, the upper seal disc are overlapped on the upper hand rest, the top of upper seal disc and the upper seal support Bottom coordinates, and the upper limit bit pointer is hinged on the upper hand rest and is coordinated with the bottom of the upper seal disc；Under described Seal receptacle is arranged on the bottom of the upper hand rest, and the lower hand rest is fixed on the lower section of the bottom sealing socket, it is described under it is close Closing disk is located between the bottom sealing socket and the lower hand rest, and the top of lower seal disc is matched somebody with somebody with the bottom of the bottom sealing socket Close, the lower seal disc is overlapped on the lower hand rest, the lower limit bit pointer be hinged on the lower hand rest and with institute The bottom for stating lower seal disc coordinates.