CN1234959C - Electric and gas dual controlled safety cut-off device on high pressure oil and gas well top - Google Patents
Electric and gas dual controlled safety cut-off device on high pressure oil and gas well top Download PDFInfo
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- CN1234959C CN1234959C CN 03117349 CN03117349A CN1234959C CN 1234959 C CN1234959 C CN 1234959C CN 03117349 CN03117349 CN 03117349 CN 03117349 A CN03117349 A CN 03117349A CN 1234959 C CN1234959 C CN 1234959C
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Abstract
The present invention relates to an electrically and pneumatically double-controlled safety cut-off device for high-pressure oil and gas well heads, which is used for the safety cut-off control of the high-pressure oil and gas well heads and relates to the technical field of the electrically and pneumatically double-controlled safety cutoff of the high-pressure oil and gas well heads. The the prior art generally adopts pneumatic or hydraulic control, and a pneumatic safety cut-off device for oil and gas well heads and a hydraulic safety cut-off device for oil and gas well heads can not be both networked with a dispatch control center to realize remote measurement and remote control. An electric control part of the present invention uses a transmitter to collect signals of pressure, temperature and valve positions, the signals are transmitted to a computer of a control center, and the computer of the control center sends instructions; wellhead high pressure draughts are automatically closed by a pneumatic control flat valve of a pneumatic control part through the coordination of each device of a control system so as to realize safety cutoff. The present invention uses a high-integration electronic device collects signals of well head pressure and uses a pneumatic device to execute the instructions, and has the capacities of high integration and automatic control. The present invention has the advantages of high reliability and easy installation, and is applied to all high-pressure oil and gas well heads.
Description
Technical field: a kind of electricity, the two control of gas high pressure oil-gas wellhead safety cut-off device, the safety that is used for high pressure oil-gas wellhead is blocked control, relates to a kind of high-pressure oil gas producing well control equipment manufacturing technology field.
Background technology: existing oil, still there is not the technique device that adopts electric two controls in the safe intercept unit of gas well mouth, generally all adopt pneumatic or hydraulic control, the operating principle of pneumatic oil and gas wellhead safety cut-off device is: source of the gas is through coarse filtration, decompression, enter the gas control two-position three-way valve behind the fine filtering, part control gas enters the cylinder of pneuamtic plate valve through rapid escape valve, make pneuamtic plate valve be in opening, another part control gas is sent to height, low pressure sensor, dangerous temperature detector and manual atmospheric valve, this moment, whole system just put into operation, when manual atmospheric valve, the height pressure sensor is because of sensing pressure anomaly emptying, and the fusible plug of dangerous temperature detector melts when causing controlling gas emptying, all can make the rapid emptying of pneumatic two-position three-way valve, this moment, pneuamtic plate valve was closed immediately automatically, cut off the well head high gas flow, realize the auto-safety shut-off function; The operating principle of hydraulic pressure oil and gas wellhead safety cut-off device and pneumatic oil, gas well safety device are very similar, and its difference only is to change source of the gas into hydraulic oil, and pneuamtic plate valve changes the hydraulic control flap type into; Pneumatic or hydraulic control well head safe cutting device all belongs to automatic control system on the spot; can't realize remote measurement, remote control with the dispatching control center networking; and the pressure-sensing method is single; if the high-low pressure sensor is malfunctioning stuck; then package unit lost efficacy; the oil and gas wellhead safety cut-off device is a device of guaranteeing bank and follow-up equipment safety, and this system down will make bank and follow-up equipment lose protection, and then causes a serious accident.
The object of the present invention is to provide a kind of automatically controlled part to gather pressure, temperature and valve position signal by transmitter, and be sent to the computer of control centre, assign instruction by control centre's computer, cooperate by each equipment in electromagnetic valve and the control system, pneuamtic plate valve by pneuamtic part is closed automatically, cut off the well head high pressure draught, realize electricity, the two control of the gas high pressure oil-gas wellhead safety cut-off device of auto-safety shut-off.
Summary of the invention: the present invention is made of pneuamtic part and automatically controlled part, and pneuamtic part comprises source of the gas filter element, pneumatic control unit, pneumatic sensing cell and pneumatic performance element, and the electric control part branch comprises electronic sensing cell, control computer;
The source of the gas filter element of pneuamtic part comprises coarse filter, pressure regulator valve and fine filter, and the two ends of pressure regulator valve connect coarse filter and fine filter respectively, and the port of export of fine filter connects the pneumatic control module;
The pneumatic control unit is made up of the pneumatic control module, two-position three way magnetic valve and the pressure meter that are installed in the control cabinet, the inlet of the two-position three way commutator in the pneumatic control module is connected with the fine filter of source of the gas filter element, export one the tunnel and link to each other with pressure regulator, another road is connected with the rapid escape valve of pneumatic performance element;
Pneumatic sensing cell is made up of high pressure and low pressure sensor, dangerous temperature detector, the high-pressure sensor of pneumatic sensing cell is installed on the well head shutoff valve outlet line, the low pressure sensor is arranged on the outlet line of eliminator, the dangerous temperature detector is separately positioned on the top of wellhead assembly and water batch heater, and the detection signal of high pressure and low pressure, dangerous temperature is by the pneumatic control unit in the instrument steel pipe Access Control case;
Pneumatic performance element is made up of pneumatic flat plate valve module, rapid escape valve, the pneumatic flat plate valve module is installed between No. three valves of well head and the well head choke valve, the pneumatic flat plate valve cylinder of this unit is installed in the top of flap type, and valve phase indicator is installed in the top of the cylinder of pneumatic flat plate valve;
The rapid escape valve of pneumatic control unit is installed in the top of pneumatic flat plate valve module, and rapid escape valve links to each other with the pneumatic flat plate valve cylinder of pneumatic flat plate valve module;
Electronic sensing cell is by high pressure, low pressure transmitter, temperature transmitter is formed, the high-pressure transmitter of electronic sensing cell is installed on the well head choke valve outlet line, the low pressure transmitter is installed on the separator outlet pipeline, temperature transmitter is installed in water batch heater and wellhead assembly top, the signal Access Control central computer of low pressure transmitter, temperature transmitter respectively;
Advantage of the present invention is: by the integrated electronic installation production wells mouth pressure signal of height, carry out control instruction by pneumatic means again, have ability highly integrated and that realization is controlled automatically, its reliability height, easy for installation is applicable to all high pressure oil-gas wellheads.
Description of drawings:
Fig. 1 is each unit schematic flow sheet of the present invention.
Fig. 2 arranges schematic diagram for the present invention is on-the-spot.
Fig. 3 is the internal construction and the flow process enlarged drawing of control cabinet 22 among Fig. 2 of the present invention.
The specific embodiment: provide most preferred embodiment of the present invention below in conjunction with accompanying drawing: the present invention is made of pneuamtic part and automatically controlled part, pneuamtic part comprises source of the gas filter element 1, pneumatic control unit 2, pneumatic sensing cell 3, pneumatic performance element 4, and the electric control part branch comprises electronic sensing cell 5, control computer 6;
The source of the gas filter element 1 of pneuamtic part comprises coarse filter 8, pressure regulator valve 7 and fine filter 9, the two ends of pressure regulator valve 7 are connected coarse filter 8 and fine filter 9 respectively by instrument steel pipe 34 and 35 respectively, and the port of export of fine filter 9 is connected with pneumatic control module 10 in the control cabinet 22 by instrument steel pipe 36;
Pneumatic sensing cell 3 is by high-pressure sensor 16, low pressure sensor 17, dangerous temperature detector 18 and 19 is formed, the high-pressure sensor 16 of pneumatic sensing cell 3 is installed on the well head shutoff valve outlet line, low pressure sensor 17 is arranged on the outlet line of eliminator 33, dangerous temperature detector 18 is arranged on the top of wellhead assembly, dangerous temperature detector 19 is arranged on the top of water batch heater 32, instrument steel pipe 39 1 ends connect low pressure sensor 17, the other end connects dangerous temperature detector 18, instrument steel pipe 41 1 ends connect dangerous temperature detector 19, the other end and instrument steel pipe 39 join, high-pressure sensor 16 connects instrument steel pipe 39 by instrument steel pipe 40, and instrument steel pipe 39 is by the pneumatic control unit 2 in the instrument steel pipe 38 Access Control casees 22;
Of the present invention, the two control of gas high pressure oil-gas wellhead safety truncated system operating principle is as follows: natural gas is extracted by the separator outlet pipeline, as the power of whole system and the source of the gas of control system, enter the coarse filter 8 of source of the gas filter element 1 through instrument steel pipe 42, deliver to pressure regulator valve 7 through filtering the back by instrument steel pipe 34, instrument steel pipe 35 was delivered to fine filter 9 after pressure transferred to 1.5～2.5MPa, deliver to the entrance of two-position three way commutator 13 of the pneumatic control module 10 of pneumatic control unit 2 by instrument steel pipe 36 through the natural gas after the smart filter, be divided into two-way behind the gas process two-position three way commutator 13, wherein one the tunnel for carrying out gas circuit, primary outlet through pneumatic control module 10, deliver to the rapid escape valve 21 of pneumatic performance element 4 by instrument steel pipe 37, behind rapid escape valve 21, deliver to the top of the pneumatic flat plate valve cylinder 24 of pneumatic flat plate valve module 20 by instrument steel pipe 43, form the cylinder back pressure, make pneumatic flat plate valve module 20 be in open mode; Another road is the control gas circuit, arrive pressure regulator 14 by two-position three way commutator 13 back of coming out, this control gas reaches 0.2～0.3MPa after pressure regulation, arriving steel pipe 44 through choke valve 15 connects with the threeway node place of steel pipe 38 and the instrument steel pipe 45 that is connected with two-position three way magnetic valve 11, wherein one the tunnel through instrument steel pipe 45, excess pressure table 12, enter the inlet of two-position three way magnetic valve 11 and provide back pressure for the two-position three way commutator 13 of pneumatic control module 10 by two-position three way magnetic valve 11, another road is the sensing gas circuit, to send into the sensing gas of control cabinet 22 as signal gas via instrument steel pipe 36, after 38 outputs of instrument steel pipe, deliver to low pressure sensor 17 and the dangerous temperature detector 18 that is arranged on its two ends through instrument steel pipe 39, deliver to dangerous temperature detector 19 through instrument steel pipe 41, deliver to high-pressure sensor 16 through instrument steel pipe 40.
When system is in the ordinary production state, each pneumatic gas circuit pressure keeps stable, if if because of fusible plug fusing that fire alarm causes dangerous temperature detector 18 and 19 taking place because of after the throttling of wellhead assembly one-level during the pressure superelevation, high-pressure sensor 16 can sense signal, and impel its pilot valve to move, when if gas transmission main line burst pressure is ultralow, low pressure sensor 17 can sense signal, and impels its pilot valve action; Above-mentioned situation all can be discharged into sensing signal gas in the atmosphere rapidly when taking place, cause Pneumatic two-position three-way reversal valve 13 to lose back pressure and commutate, blocking the gas that comes gas and will carry out rapidly in the cylinder of source of the gas releases rapidly to atmosphere, finally cause the well head safe stop valve to be closed automatically rapidly, reach protection protection well site personnel and device security purpose;
The action principle of electric-control system of the present invention is as follows: when system is in the operation of ordinary production state; the electronic sensing cell 5 of automatically controlled part can be sent to operational factor on the computer of control centre in real time; in time print and file; in case unusual emergency case takes place in the well site; if high-pressure detector 16 or the low pressure sensor 17 at this moment run into again in the pneumatic sensing cell 3 are stuck for some reason ineffective; perhaps dangerous temperature detector 18 or 19 breaks down for some reason; the pneumatic sensing signal of pneuamtic part can't pass to pneumatic sensing cell 3; the well head safe stop valve also can't cut out; at this moment electronic sensing cell 5 can be reacted to one of following abnormal conditions: when fire alarm high temperature takes place; temperature transmitter 28 and 29 passes to signal on the computer of control centre; when after the throttling of wellhead assembly one-level during the pressure superelevation; high-pressure transmitter 26 can send pressure superelevation signal to the computer of control centre; when gas transmission main line burst pressure ultralow; low pressure transmitter 27 signal that pressure is ultralow is passed to the computer of control centre; control centre's computer is by calculating that signal value and setting value are compared; in time issue an order then and open two-position three way magnetic valve 11; make two-position three way commutator 13 in the pneumatic control module 10 lose back pressure and commutate; block coming gas and will carrying out signal gas rapidly and release of source of the gas to atmosphere; will cause rapid escape valve 21 actions so immediately; the gas of carrying out in the cylinder is released rapidly to atmosphere; and therefore cause the well head safe stop valve to be closed automatically rapidly; reach protection well site personnel and device security purpose; 30 for being installed in the pressure meter of well head, and the 31st, lead to the pipeline of water batch heater 32 from pneumatic flat plate valve module 20.
The advantage of electricity of the present invention, gas control high pressure oil-gas wellhead safety cut-off system processed is that control system is electricity, the dual guarantor of gas The danger, the reliability height; System is divided into six unit by its function, is convenient to install, safeguards and uses; The gas control unit uses Integrated Pneumatic module, improved the intensive degree of product, reduce installation workload, increased pneumatic control and originally be The reliability of system, native system adopt electronic transmitter to gather pressure, temperature and valve position signal, and to the scheduling center cluster, Realize the real-time demonstration of control centre to the Well site safety parameter, monitoring and far distance controlled and autoshutdown, opened well Mouthful, improved the safety of well site automatic management level, protection well site and follow-up equipment, also protected the ecology ring in gas field The border.
Claims (1)
1. an electricity, the two control of gas high pressure oil-gas wellhead safety cut-off devices are made of pneuamtic part and automatically controlled part, it is characterized in that:
A. the two ends of the pressure regulator valve (7) of the source of the gas filter element (1) of described pneuamtic part connect coarse filter (8) and fine filter (9) respectively, and the port of export of fine filter (9) is connected with pneumatic control module (10) in the control cabinet (22); The pneumatic control module (10) of described pneumatic control unit (2), two-position three way magnetic valve (11) and pressure meter (12) all are installed in the control cabinet (22), the inlet of the two-position three way commutator (13) of pneumatic control module (10) is connected with the fine filter (9) of source of the gas filter element (1), export one the tunnel and link to each other with pressure regulator (14), another road is connected with the rapid escape valve (21) of pneumatic performance element (4); The dangerous temperature detector (18) that is installed in high-pressure sensor (16) on the well head shutoff valve outlet line, is installed in low pressure sensor (17) on eliminator (33) outlet conduit, is installed in the dangerous temperature detector (19) of water batch heater (32) top and is arranged on the well head top passes through the pneumatic control unit (2) in the instrument steel pipe Access Control case (22); The pneumatic flat plate valve module (20) of pneumatic performance element (4) is installed between No. three valves of well head and the well head choke valve, the pneumatic flat plate valve cylinder (24) of this unit is installed in the top of flap type (23), and valve phase indicator (25) is installed in the top of the cylinder (24) of pneumatic flat plate valve; The rapid escape valve (21) of pneumatic control unit (2) is installed in the top of pneumatic flat plate valve module (20), and rapid escape valve (21) links to each other with the pneumatic flat plate valve cylinder (24) of pneumatic flat plate valve module (20);
B. described electric control part branch comprises electronic sensing cell (5), control computer (6), electronic sensing cell (5) is by high-pressure transmitter (26), low pressure transmitter (27), temperature transmitter (28) and (29) are formed, high-pressure transmitter (26) is installed on the well head choke valve outlet line, low pressure transmitter (27) is installed on the separator outlet pipeline, temperature transmitter (28) is installed in water batch heater (32) top, low pressure transmitter (27), the signal of temperature transmitter (28) and (29) is connected with the control computer (6) of control centre by signal cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117349 CN1234959C (en) | 2003-02-26 | 2003-02-26 | Electric and gas dual controlled safety cut-off device on high pressure oil and gas well top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117349 CN1234959C (en) | 2003-02-26 | 2003-02-26 | Electric and gas dual controlled safety cut-off device on high pressure oil and gas well top |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431382A CN1431382A (en) | 2003-07-23 |
| CN1234959C true CN1234959C (en) | 2006-01-04 |
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ID=4790727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117349 Expired - Lifetime CN1234959C (en) | 2003-02-26 | 2003-02-26 | Electric and gas dual controlled safety cut-off device on high pressure oil and gas well top |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1234959C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781978B (en) * | 2009-11-30 | 2012-08-29 | 四川华宇石油钻采装备有限公司 | Integrated control system for safety block valve |
| CN101775966A (en) * | 2010-01-26 | 2010-07-14 | 中国石油集团工程设计有限责任公司 | Novel ultrahigh pressure throttling protection technology |
| CN101915069A (en) * | 2010-07-23 | 2010-12-15 | 黄振富 | Sulfur-resistant oil and gas extraction wellhead device provided with structure for replacing No.1 main control valve |
| CN104196483B (en) * | 2014-08-26 | 2017-01-11 | 乐山倍创机械制造有限公司 | Pneumatic wellhead shut-off device |
| CN107989599B (en) * | 2017-12-28 | 2021-05-28 | 贵州航天凯山石油仪器有限公司 | Low-power-consumption wireless communication system and method for plunger pressure gauge |
-
2003
- 2003-02-26 CN CN 03117349 patent/CN1234959C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1431382A (en) | 2003-07-23 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180111 Address after: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Address before: 610017 Sichuan province Chengdu Xiaoguan Temple Backstreet No. 28 Patentee before: SOUTHWEST SUBSIDIARY Co. ENGINE |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20060104 |
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| CX01 | Expiry of patent term |