CN201292820Y

CN201292820Y - Hydraulic cut off control device for well site safety

Info

Publication number: CN201292820Y
Application number: CNU2008202230332U
Authority: CN
Inventors: 杨小平; 钱以诚; 罗东春
Original assignee: SHIFANG HUIFENG OIL RECOVERY MACHINERY CO Ltd
Current assignee: SHIFANG HUIFENG OIL RECOVERY MACHINERY CO Ltd
Priority date: 2008-12-01
Filing date: 2008-12-01
Publication date: 2009-08-19
Anticipated expiration: 2018-12-01

Abstract

The utility model relates to a well-field safety hydraulic cutting control device which belongs to the technical field of control devices of cutting valves and comprises a hydraulic control assembly and a hydraulic sensing assembly, wherein a hydraulic control mechanism is arranged on a shell of an executing mechanism. The utility mode provides the well-field safety hydraulic cutting control device which adopts a hydraulic executing mechanism and integrates a control mechanism and the executing mechanism. The utility model solves the problems that a hydraulic pipeline is long as the executing mechanism and the control mechanism are split, thereby causing the cutting-off time to be longer. The hydraulic control assembly is folded into a whole module which is then arranged on the shell of the executing mechanism, and therefore, the utility model has compact structure and realizes the remote metering and the remote control of the well-field hydraulic safety device.

Description

Well site safe hydraulic pressure cut-off control device

Technical field:

A kind of well site safe hydraulic pressure cut-off control device is used for the security control in petroleum gas well site, relates to the electromechanical integration cut-out cock of petroleum gas well head control and the design and manufacturing technology field of control device thereof.

Background technology:

In the production run process of petroleum gas well head, when causing pressure reduction or fire alarm etc. to happen suddenly dangerous situation when generation gas transmission line pressure superelevation after the throttling of well head one-level or because of the pipeline explosion, all need to close automatically rapidly well head, to prevent the further expansion of dangerous situation, reach the purpose of protection wellsite facility and personnel's life security, realize that the equipment of emergency cut-off well head is exactly the well head safe cutting device; It is pneumatic and surge two types that existing well head safe cutting device is divided into: pneumatic well head safe cutting device is that natural gas by the well site is as carrying out source of the gas, in 3～5 seconds, just can block the passage of well head, have the advantage that actuator is active in one's movements, shortcoming is, because the H in the natural gas ₂S and CO ₂Medium easily produces corrosion to actuator, control element, and particularly under unattended well station and bad working environments environment, it is outstanding especially that etching problem seems, work is had a strong impact on; Hydraulic pressure well head safe cutting device can be avoided and H ₂S and CO ₂Directly contact, in the bad working environments environment, use also unaffected, but, existing hydraulic pressure well head safe cutting device is split type because of executing agency and controlling organization, hydraulic line by 10～20M connects between the two, therefore cause on-the-spot urgent time to chopping longer, and equipment is installed loaded down with trivial details, cost of manufacture is also higher, and the existing pneumatic or well head safe cutting device that surges only can be implemented promptly to block, can not implement emergency safety and release, therefore can not satisfy the needs of safety in production fully.

Goal of the invention: the utility model purpose is at the deficiencies in the prior art, mode according to control and executive mechanism element modularized design, a kind of employing hydraulic actuating mechanism is provided, and the well site safe hydraulic pressure cut-off control device of set control and executing agency.

The utility model is achieved in that a kind of well site safe hydraulic pressure cut-off control device, form by hydraulic control and executing agency, it is characterized in that: described hydraulic control comprises Hydraulic Conirol Unit and hydraulic pressure sensing component, and hydraulic control is arranged on the shell of executing agency;

Described Hydraulic Conirol Unit comprises handlance, reducing valve, relay valve, accumulator, quick fluid-discharge valve, the two ends of handlance are provided with import one way valve and outlet one way valve, be provided with the superpressure overflow valve in the rear end of reducing valve, be provided with choke valve at the front end of relay valve;

The handlance of described Hydraulic Conirol Unit, reducing valve, relay valve are that closed assembly becomes the integral module structure, and interconnect with steel pipe and quick fluid-discharge valve, accumulator, the inlet of handlance links to each other with the oil-out of executing agency, and the pouring orifice of quick fluid-discharge valve links to each other with the oil-in of executing agency;

Described hydraulic pressure sensing component is made up of high-low pressure sensing pilot valve, fire alarm fusible plug, explosion-proof solenoid valve, valve position sensor, electronic monitor, wherein height sensing pilot valve, fire alarm fusible plug, explosion-proof solenoid valve are linked to each other by steel pipe mutually, and the explosion-proof head of valve position sensor, explosion-proof solenoid valve is connected by cable with electronic monitor;

Advantage of the present utility model with beneficial effect is: the handlance of control block hydraulic unit with, reducing valve, relay valve closed assembly become integral module, and formation internal oil passages, control block hydraulic unit with and hydraulic pressure sensing part are installed on executing agency's shell, have the compact conformation characteristics, the electronic monitor of setting can be external computer system realize the telemetry and telecommand of well site fluid pressure warning device.

Description of drawings:

To be the utility model launch the scheme of installation that is connected with executing agency to Fig. 1.

Fig. 2 is the integrated scheme of installation of the utility model.

Fig. 3 looks integrated scheme of installation for the right side of the utility model Fig. 2.

The specific embodiment:

Provide case study on implementation of the present utility model below in conjunction with accompanying drawing, the utility model is made up of hydraulic control and executing agency, and hydraulic control comprises Hydraulic Conirol Unit and hydraulic pressure sensing component:

Hydraulic Conirol Unit comprises handlance 12, reducing valve 13, relay valve 14, accumulator 16, quick fluid-discharge valve 25, Hydraulic Conirol Unit is arranged on the shell of executing agency, be provided with import one way valve 22 and outlet one way valve 23 at the two ends of handlance 12, front end at reducing valve 13 is provided with superpressure overflow valve 24, is provided with choke valve 28 at the front end of relay valve 14; Handlance 12, reducing valve 13, relay valve 14 are that closed assembly becomes the integral module structure, and interconnect with steel pipe and quick fluid-discharge valve 25, accumulator 16, the inlet of handlance 12 is connected with the oil-out of executing agency 30, and the pouring orifice of quick fluid-discharge valve 25 links to each other with the oil-in of executing agency 29;

The hydraulic pressure sensing component is made up of high-low pressure sensing pilot valve 17, fire alarm fusible plug 18, explosion-proof solenoid valve 19, valve position sensor 1, electronic monitor 21, wherein high-low pressure sensing pilot valve 17, fire alarm fusible plug 18, explosion-proof solenoid valve 19 are linked to each other by steel pipe, the explosion-proof head of valve position sensor 1, explosion-proof solenoid valve 19 and electronic monitor 21 are connected by cable, and the hydraulic pressure sensing element also is installed on the cylindrical of executing agency;

Operation of the present utility model: pull handle 15 and make it in the closed position, relay valve 14 is in off-state, the artificial handlance 12 that back and forth drives makes the hydraulic oil of storage in fuel tank 6 flow into handlance 12 through one way valve 22, hydraulic oil after handlance 12 superchargings is divided into two-way through one way valve 23 and enters duty, one route is carried out pipeline through quick fluid-discharge valve 25 and oil-in 29, enter in the oil cylinder 2 of executing agency, the hydraulic oil of supercharging impels piston 4 to move downward, and drive valve rod 8, valve position indicating arm 3 moves downward, it is descending to promote flashboard 11, because the through hole on the flashboard 11 leaves up, so the following enforcement flat gate valve of flashboard 11 is in open mode; Another road hydraulic oil enters accumulator 16 and relay valve 14 after reducing valve 13 decompressions, arrive high-low pressure sensing pilot valve 17, fire alarm fusible plug 18, explosion-proof solenoid valve 19 through choke valve 28; Because valve position indicating arm 3 is descending, valve position sensor 1 is transferred to electronic monitor 21 with signal, and shows running status, and at this moment, the well site fluid pressure warning device is in opens running status;

Of the present utility modelly promptly block operation: when promptly blocking purposes, need to adopt the perforate of flashboard 11 to be arranged on the flap type of flashboard 11 upper ends the utility model; Survey pilot valve 17 when the height pressure-sensitive and sense the fusible plug fusing or when occurring in case of fire of the pressure superelevation of gas transmission line or ultralow, fire alarm fusible plug 18, just need fluid pressure warning device to realize blocking fast by the situation that electronic monitor 21 starts explosion-proof solenoid valves 19; The course of work is: in advance handle 15 is set to from controlled position, make relay valve 14 be in automatic control state, when high-low pressure sensing pilot valve 17 senses gas transmission line pressure superelevation or when ultralow, high-low pressure sensing pilot valve 17 begins action, when fire alarm fusible plug 18 in case of fire the time, fusible plug dissolves, perhaps when the signal of electronic monitor 21 starts explosion-proof solenoid valve 19, the capital makes the later control piper decompression of choke valve 28, this decompression causes relay valve 14 actions, and forcing 25 actions of quick fluid-discharge valve, the hydraulic oil in the hydraulic cylinder 2 is in quick fluid-discharge valve 25 directly returns the fuel tank of fuel tank 6; Because the outflow of piston 4 top hydraulic oil, piston 4 just moves up under the promotion of spring 5 fast, and drive valve rod 8, flashboard 11 and valve position indicating arm 3 move upward, because the perforate on the flashboard is arranged on the upper end of flashboard, so, when flashboard moves upward, passage has just been closed, reach promptly blocking fast of well site fluid pressure warning device, because valve position indicating arm 3 is up, during through valve position sensor 1, just be detected, and on electronic monitor 21, show valve closing, the state that passage blocks;

The operation that the utility model is promptly released: the utility model is to be in closed condition when the well head passage as the situation of the purposes of promptly releasing, and when needing to implement promptly to release purposes fast, and the perforate that needs to install flashboard 11 is arranged on the flap type of flashboard 11 lower ends; In advance handle 15 is set to from controlled position, make relay valve 14 be in automatic control state, when high-low pressure sensing pilot valve 17 senses the pressure superelevation of gas transmission line or ultralow, when fire alarm fusible plug 18 in case of fire fusible plug dissolve or when starting explosion-proof solenoid valves 19 by electronic monitor 21, all can cause the control piper decompression behind the choke valve 28, and cause relay valve 14 to move, force 25 actions of quick fluid-discharge valve, implement promptly releasing fast of well site fluid pressure warning device, in the hydraulic cylinder 2 hydraulic oil in quick fluid-discharge valve 25 directly returns the fuel tank of fuel tank 6, in the hydraulic cylinder 2 hydraulic oil flow downwards, cause piston 4 tops to lose support force, therefore piston 4 moves up under resetting of spring 5 promotes fast, drive valve rod 8, flashboard 11 and valve position indicating arm 3 move upward, because the perforate on the flashboard is arranged on the lower end of flashboard, so, when flashboard moves upward, passage has just been opened, can reach promptly releasing fast of well site fluid pressure warning device, because valve position indicating arm 3 up monitoring, so on electronic monitor 21, can show the state of releasing; Figure number 20 is sheaths of valve position indicating arm 3 in the accompanying drawing, and

figure number

26 and 27 is pressure meters, and figure number 10 is valve seats, and figure number 7 is valve gaps, and figure number 9 is valve bodies.

Claims

1. a well site safe hydraulic pressure cut-off control device is made up of hydraulic control and executing agency, it is characterized in that: described hydraulic control comprises Hydraulic Conirol Unit and hydraulic pressure sensing component, and hydraulic control is arranged on the shell of executing agency.

2. well site according to claim 1 safe hydraulic pressure cut-off control device, it is characterized in that: described Hydraulic Conirol Unit comprises handlance, reducing valve, relay valve, accumulator, quick fluid-discharge valve, the two ends of handlance are provided with import one way valve and outlet one way valve, be provided with the superpressure overflow valve in the rear end of reducing valve, be provided with choke valve at the front end of relay valve.

3. well site according to claim 1 safe hydraulic pressure cut-off control device, it is characterized in that: the handlance of described Hydraulic Conirol Unit, reducing valve, relay valve are that closed assembly becomes the integral module structure, and interconnect with steel pipe and quick fluid-discharge valve, accumulator, the inlet of handlance links to each other with the oil-out of executing agency, and the pouring orifice of quick fluid-discharge valve links to each other with the oil-in of executing agency.

4. well site according to claim 1 safe hydraulic pressure cut-off control device, it is characterized in that: described hydraulic pressure sensing component is made up of high-low pressure sensing pilot valve, fire alarm fusible plug, explosion-proof solenoid valve, valve position sensor, electronic monitor, wherein height sensing pilot valve, fire alarm fusible plug, explosion-proof solenoid valve are linked to each other by steel pipe mutually, and the explosion-proof head of valve position sensor, explosion-proof solenoid valve is connected by cable with electronic monitor.