CN201043451Y - Hydraulic cylinder supercharging device of blowout preventer - Google Patents
Hydraulic cylinder supercharging device of blowout preventer Download PDFInfo
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- CN201043451Y CN201043451Y CNU2007200798534U CN200720079853U CN201043451Y CN 201043451 Y CN201043451 Y CN 201043451Y CN U2007200798534 U CNU2007200798534 U CN U2007200798534U CN 200720079853 U CN200720079853 U CN 200720079853U CN 201043451 Y CN201043451 Y CN 201043451Y
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- booster
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Abstract
A fluid cylinder booster device for blowout preventer belongs to a protective device in petroleum drilling and production equipment, the purpose of which is to solve the problems that incapability of shearing a high strength drill rod or increased equipment volume, fund consumption and increased costs caused by shearing the high strength drill rod in prior art, which includes a pressure-controlled valves group controlled by system pressure, a booster cylinder controlling the oil way on-off between the big piston cavity and the system pressure oil through the pressure-controlled valves group; wherein the pressure-controlled valves group includes a pilot control valve and a booster control valve, a working oil port of the pilot control valve is communicated with the control oil port of the booster control valve; the booster device includes a sequence valve, an oil outlet of the sequence valve is communicated with the oil outlet of the booster cylinder and the booster shearing pressure gauge; an oil inlet of the sequence valve is communicated with a normal closing pressure gauge and a working oil port of the booster control valve; a first pressure valve is communicated between the oil inlet of the sequence valve and the oil tank; a second pressure valve is communicated between the oil outlet of the sequence valve and the oil tank; which is suitable for various blowout preventers.
Description
Technical field
The utility model belongs to the protector in the oil drilling and extracting equipment, particularly a kind of fluid cylinder supercharging device of oil gas field preventer.
Background technology
Safety urgent and that jeopardize the person, equipment occurs at the situ of drilling well of oil exploration, again under the situation about can not in time handle, the method that can use a kind of equipment that is the shear ram preventer that drilling rod is cut off is with the fluid passage in the cut-out well.
The preventer fluid cylinder is the effect lower piston motion generation thrust at hydraulic pressure, drives the switch motion that flashboard is realized preventer.The size of fluid cylinder thrust under the constant condition of hydraulic control system pressure, depends on the size of liquid cylinder piston area.Guaranteeing that the preventer normal switch meets under the condition of use, the designer has considered the fluid cylinder area design to be made too big, will strengthen the volume of preventer, thereby increases manufacturing cost, difficulty of processing and cause the waste of resource.
According to the requirement of the API 16A of American Petroleum Institute (API), the fluid cylinder of present employed preventer before factory dispatches from the factory, had all been done the pressure check (1.5 times of pressure testing checks of rated operating pressure) of 31.5MPa.That is to say the hydraulic coupling that the fluid cylinder of the preventer of present use can both bear 31.5MPa.
The rated pressure of presently used hydraulic control system is 21MPa, and conventional fluid cylinder promotes the general 8.5～10.5MPa of employing of pressure.As long as open bypass valve for dealing with emergency case, just can obtain than routine operating pressure Duo one times be the control oil pressure of 21MPa.Therefore, American Petroleum Institute (API) (API) is in the standard of its 16A, just recommend designed preventer that shear ram is installed, under the enough situation of conventional design fluid cylinder area, satisfy system pressure and be lower than 21MPa to cut off diameter be that 5 inches, nominal weight are 19.5 pounds/meter G level and S-135 level drilling rod.
But along with the oil exploration development that deepens continuously, oil, gas well just bore dark more more, the intensity of G level and S-135 level drilling rod does not reach the requirement of probing deep-well and ultradeep well, thereby the drilling rod (impact value is more than 100 joules) of more high-intensity S-145～S-155 has appearred, adopt high-intensity like this drilling rod to drill.Originally the pressure that produced under the pressure of 21MPa of She Ji big liquid cylinder piston area (fluid cylinder of 13.5～14``) is what can't cut off greater than the high-strength drill pipe more than 100 joules.Thereby in drilling process, will bring potential safety hazard.
In this case, the manufacturer of preventer, attempting increases fluid cylinder thrust with the area that changes original designing blowout preventer fluid cylinder.But what increase that the fluid cylinder area brings is the increasing of increase of preventer volume and manufacturing cost, difficulty of processing again.Another kind of solution increases the shear ability that an auxiliary fluid cylinder increases shear ram exactly again outside former fluid cylinder.These two kinds of methods are feasible, but are subjected to many restrictions, as increase when assisting fluid cylinder, and the length of preventer also can increase greatly.And this auxiliary fluid cylinder factory directly going out to increase on the plant and can manage it, but at now having dropped into just unusual difficulty of the on-the-spot preventer that uses of probing, reach the ability of cutting off high-strength drill pipe, just must transform the preventer of existing use.What the preventer transformation brought will be to increase improvement cost, of long duration, the disadvantage of operation inconvenience and increase volume.And existing preventer is taken away and is transformed also very difficulty, can not accomplish in reality production reality.
Abroad, adopt " strengthen the fluid cylinder diameter and behind main fluid cylinder, set up the boosting fluid cylinder " these two kinds of methods to be solved usually.But these two kinds of methods need drop into bigger foreign exchange funds, big, the complex manufacturing of manufacturing difficulty of processing.
The utility model content
The purpose of this utility model is to solve can not cutting off high-strength drill pipe or increasing equipment volume for cutting off high-strength drill pipe of prior art existence, expend fund, increase the problem of cost, preventer at the production scene use, a kind of preventer fluid cylinder supercharging device is provided, according to original method shear ram is installed, in the range of pressure values of the rated pressure 21MPa of hydraulic control system, do not change preventer fluid cylinder area, existing preventer and hydraulic system are not done change, to realize that moment increases the thrust of preventer fluid cylinder, reach and cut off high-strength drill pipe, the purpose that eliminates safe hidden trouble.
The purpose of this utility model realizes by following technical proposals:
Preventer fluid cylinder supercharging device comprises a voltage-controlled valve group that is subjected to system pressure control, the pressurized cylinder by the oil circuit break-make between this voltage-controlled valve group control big piston chamber and the system pressure oil.
Described voltage-controlled valve group comprises pilot-actuated valve and supercharger control valve, and the actuator port of pilot-actuated valve is communicated with the control port of supercharger control valve.
Described supercharging device also comprises sequence valve, and the oil-out of sequence valve is communicated with the oil-out of pressurized cylinder, supercharging shear pressure table; The oil-in of sequence valve is communicated with normal closing presure table, and is communicated with an actuator port of supercharger control valve.
Be communicated with first pressure valve between the oil-in of described sequence valve and the fuel tank.
Be communicated with second pressure valve between the oil-out of described sequence valve and the fuel tank.
The utility model adopts voltage-controlled pilot-actuated valve that system pressure is surveyed, when system pressure is established pressure greater than the accent of pilot-actuated valve, pilot-actuated valve is opened, open the control port of supercharger control valve and the oil circuit between the system pressure oil, thereby the oil inlet and outlet break-make in the supercharger control valve is switched, make system pressure oil enter the big piston chamber of pressurized cylinder, make pressurized cylinder output increased pressure, because the pressurized cylinder oil-out is communicated with (the preventer oil-in was communicated with system pressure oil originally) with the oil-in of preventer fluid cylinder, make shear ram obtain stronger shearing force at short notice, to cut off high-intensity drilling rod.Under the normal condition, pilot-actuated valve is closed, and system pressure oil directly enters the preventer fluid cylinder by supercharger control valve, does not influence normal use.
Because the utility model is the additional mechanical supercharging device as the preventer fluid cylinder, do not change the volume and the structure of existing preventer, the element that adopts is few, simple in structure, compared with prior art, have the advantage that cost is low, volume is little, do not change preventer fluid cylinder area, can existing preventer and hydraulic system not done change, increase the thrust of preventer fluid cylinder to realize moment, reach and cut off high-strength drill pipe, the purpose that eliminates safe hidden trouble.
Description of drawings
Fig. 1 is the structural representation under the utility model normal condition;
Fig. 2 is the structural representation under the utility model duty;
Number in the figure, the 1st, pilot-actuated valve, the 2nd, supercharger control valve, the 3rd, normal closing presure table, the 4th, supercharging shear pressure table, 5 is first pressure valve, the 6th, sequence valve, 7 is second pressure valve, the 8th, pressurized cylinder.
The specific embodiment
Below in conjunction with specific embodiments and the drawings the utility model is further described.
As shown in Figure 1 and Figure 2, the pilot-actuated valve 1, supercharger control valve 2 and the pressurized cylinder 8 that comprise of preventer fluid cylinder supercharging device.The actuator port of pilot-actuated valve 1 is communicated with the control port of supercharger control valve 2.
Above-mentioned supercharging device also comprises sequence valve 6, and the oil-out of sequence valve 6 is communicated with oil-out, the supercharging shear pressure table 4 of pressurized cylinder 8; The oil-in of sequence valve 6 is communicated with normal closing presure table 3, and is communicated with an actuator port of supercharger control valve 2.Be communicated with first pressure valve 5 between the oil-in of sequence valve 6 and the fuel tank; Be communicated with second pressure valve 7 between the oil-out of sequence valve 6 and the fuel tank.
The operating principle of this supercharging device is as follows:
System oil-way is communicated with supercharging device input port B, and supercharging device delivery outlet B1 shear ram is closed the cylinder input port and is communicated with.The liquid cylinder piston motion promotes shear ram and moves to the center by under the effect of the 10.5MPa of system pressure, realizes the closing function of shear ram.(under the situation of no drilling rod, shear ram is made blank ram and is used in well.)
When after system's output pressure is greater than 10.5MPa, reaching the pressure of guide's control in the supercharging device, first pressure valve 5, second pressure valve 7 and sequence valve 6 commutations in the supercharging device, the supercharger control valve 2 in the supercharging device is opened in control, obtains the increase pressure of pressurized cylinder.The flow that increases enters shear ram fluid cylinder input port by B1 equally, promotes the liquid cylinder piston motion and cuts off the interior drilling rod of well, and the oil return after the pressurized cylinder off-load is in shear ram fluid cylinder return line retrieval system fuel tank.The size of boost pressure depends on the adjusting control of pilot-actuated valve 1, first pressure valve 5 and second pressure valve 7 in the supercharging device of system's output pressure.
For example:
As shown in Figure 1, system's input pressure is 10.5MPa during the well-control equipment operate as normal, pilot-actuated valve 1 is set up at 12MPa, system pressure oil enters supercharger control valve 2 through the B mouth, directly pass through the a2 hydraulic fluid port of supercharger control valve 2, enter the input port B1 of preventer fluid cylinder again by sequence valve 6, then supercharging device is in static attonity state;
As shown in Figure 2, system's input pressure reaches 15MPa, during the 12MPa pressure set up greater than pilot-actuated valve 1, pilot-actuated valve 1 is opened, make supercharger control valve 2 commutation, system pressure oil flows to the big piston chamber of pressurized cylinder 8 through the b1 of supercharger control valve 2 hydraulic fluid port, by the valve piston chamber effect of pressurized cylinder 8, maximum can obtain supercharging output pressure≤31.5MPa, pressurization time: 3～5 seconds.
Among Fig. 1, Fig. 2, A---A1 is that shear ram is opened passage; B---B1 is the shear ram closing passage.
Evidence:
When the pressure setting of guide's control valve 1 was 8.5MPa, the supercharging device output pressure reached 17.5MPa;
When the pressure setting of guide's control valve 1 was 12MPa, the supercharging device output pressure reached 24.5MPa;
When the pressure of guide's control valve 1 was set at 15MPa, the supercharging device output pressure reached 30.5MPa;
Under the limiting case, when the pressure setting of guide's control valve 1 is 20MPa, the exportable pressure of supercharging device up to 41.5MPa.
The evidence at oil drilling scene under the action of hydraulic force of 24MPa, has effectively been cut off quality and is 19.5 pounds/meter S-145 drilling rod (impact value is more than 100 joules) with the 14`` fluid cylinder; Under the action of hydraulic force of 26.5MPa, effectively cut off the S-145 drilling rod (impact value is more than 100 joules) of 19.5 pounds/meter of quality with the 13.5`` fluid cylinder.
This supercharging device has following advantage:
1, easy to operate, self-compensating pressure.
2, easy for installation, can with closing of any one preventer connection be installed on the oil circuit at any time This supercharging device.
3, the normal operation of control system is not exerted an influence and change, to installing and this supercharging dress not being installed Put in operation and do not have impact. The pressure that supercharging device increases only increases thrust and enhancing to the shear ram fluid cylinder The locomitivity of shear ram liquid cylinder piston. It does not exert an influence to system pressure, returning after the off-load of increase cylinder Oil directly returns fuel tank, and, the boost pressure regulation valve of supercharging device, according to requirements, at 31.5MPa Below the pressure, can make any pressure regulation and control.
4, applicability is wide, applicable to the preventer of the various model specifications of producing both at home and abroad.
5, with low cost.
Claims (5)
1. preventer fluid cylinder supercharging device is characterized in that: comprise a voltage-controlled valve group that is subjected to system pressure control, the pressurized cylinder (8) by the oil circuit break-make between this voltage-controlled valve group control big piston chamber and the system pressure oil.
2. preventer fluid cylinder supercharging device according to claim 1, it is characterized in that: described voltage-controlled valve group comprises pilot-actuated valve (1) and supercharger control valve (2), the actuator port of pilot-actuated valve (1) is communicated with the control port of supercharger control valve (2).
3. as preventer fluid cylinder supercharging device as described in the claim 2, it is characterized in that: described supercharging device also comprises sequence valve (6), and the oil-out of sequence valve (6) is communicated with the oil-out of pressurized cylinder (8), supercharging shear pressure table (4); The oil-in of sequence valve (6) is communicated with normal closing presure table (3), and is communicated with an actuator port of supercharger control valve (2).
4. as preventer fluid cylinder supercharging device as described in the claim 3, it is characterized in that: be communicated with first pressure valve (5) between the oil-in of described sequence valve (6) and the fuel tank.
5. as preventer fluid cylinder supercharging device as described in the claim 4, it is characterized in that: be communicated with second pressure valve (7) between the oil-out of described sequence valve (6) and the fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200798534U CN201043451Y (en) | 2007-06-08 | 2007-06-08 | Hydraulic cylinder supercharging device of blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200798534U CN201043451Y (en) | 2007-06-08 | 2007-06-08 | Hydraulic cylinder supercharging device of blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043451Y true CN201043451Y (en) | 2008-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200798534U Expired - Fee Related CN201043451Y (en) | 2007-06-08 | 2007-06-08 | Hydraulic cylinder supercharging device of blowout preventer |
Country Status (1)
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| CN (1) | CN201043451Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006012A (en) * | 2014-05-12 | 2014-08-27 | 天津优瑞纳斯液压机械有限公司 | Oil and water supercharger system set |
| CN103352878B (en) * | 2013-07-01 | 2015-08-19 | 西南石油大学 | A kind of with brill formation pressure testing instrument supercharging device |
| CN104989682A (en) * | 2015-07-30 | 2015-10-21 | 盐城市大冈石油工具厂有限责任公司 | Portable pressurization control device |
| CN111852379A (en) * | 2020-08-13 | 2020-10-30 | 广州东塑石油钻采专用设备有限公司 | Valve linkage device, drill rod shearing method and blowout preventer control device |
-
2007
- 2007-06-08 CN CNU2007200798534U patent/CN201043451Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352878B (en) * | 2013-07-01 | 2015-08-19 | 西南石油大学 | A kind of with brill formation pressure testing instrument supercharging device |
| CN104006012A (en) * | 2014-05-12 | 2014-08-27 | 天津优瑞纳斯液压机械有限公司 | Oil and water supercharger system set |
| CN104989682A (en) * | 2015-07-30 | 2015-10-21 | 盐城市大冈石油工具厂有限责任公司 | Portable pressurization control device |
| CN104989682B (en) * | 2015-07-30 | 2017-02-01 | 盐城市大冈石油工具厂有限责任公司 | Portable pressurization control device |
| CN111852379A (en) * | 2020-08-13 | 2020-10-30 | 广州东塑石油钻采专用设备有限公司 | Valve linkage device, drill rod shearing method and blowout preventer control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080402 Termination date: 20160608 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |