CN103437743A - Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve - Google Patents
Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve Download PDFInfo
- Publication number
- CN103437743A CN103437743A CN2013103262073A CN201310326207A CN103437743A CN 103437743 A CN103437743 A CN 103437743A CN 2013103262073 A CN2013103262073 A CN 2013103262073A CN 201310326207 A CN201310326207 A CN 201310326207A CN 103437743 A CN103437743 A CN 103437743A
- Authority
- CN
- China
- Prior art keywords
- pressure
- shear
- sheet
- shearing
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a pressure actuating mechanism used for a pressure detonation device and a reverse circulation valve. The pressure actuating mechanism is characterized in that as the inner diameter of an inner cavity of a piston bush has inner diameter difference, a step is formed; the step is provided with a shear blade; a shear piston is located on the shear blade; a blank holder is arranged between the piston bush and the shear piston. According to the pressure actuating mechanism used for the pressure detonation device and the reverse circulation valve provided by the invention, a shear pin-type pressure actuating mechanism adopted in an original pressure excitation-type detonation device and an original pump pressure-type reverse circulation valve can be replaced with a shear blade-type pressure actuating mechanism. The shear blade is compressed in the piston bush by the blank holder, and thus, when the shear blade is sheared by the shear piston under the action of pressure, the shear blade cannot shift in any directions, and therefore, the precision of applied shear pressure is improved, and a wellhead pressurization error is reduced.
Description
Technical field
The invention belongs to a kind of pressure-operated mechanism, relate to a kind of shearing chip pressure-operated mechanism, be applicable in the Oil/gas Well operation process to apply certain pressure by well head and realize pressure blasting or open oil pipe and a kind of shearing chip pressure-operated mechanism of annulus access.
Background technology
Pressure excitation type detonating device is widely used in Oil/gas Well and detonates in operation, it is by pressurizeing to oil pipe or sleeve pipe at well head, when institute's plus-pressure and well hydraulic coupling sum are greater than the shear strength limit of shear pin, be that mineralization pressure is poor, shear pin is cut off, igniter cap clashes into gets angry, and the propagation of explosion sequence starts effect.The 62nd page 78 pages of " the Oil/gas Well burning blasting techniques " of publishing in Shaanxi science tech publishing house are upper, and Zhang Shuanji and Wang Wei have delivered paper: pressure excitation type detonating device.
All adopt by piston bush 1, shear pin 2 in the various pressure excitation type detonating devices of application at present and shear the shear pin formula pressure-operated mechanism that 3 three basic parts of piston form.(Fig. 4)
Above-mentioned shear pin formula pressure-operated mechanism, due to the restriction that is subject to the accuracy of manufacture, cuts off between hole and shear pin and has gap, and several cut off hole and shear pin also can not, in same plane, can produce following two kinds of situations while on shear pin, applying shear pressure:
1. have gap owing to cutting off between hole and shear pin, when exerting pressure on shear pin, shear pin can produce displacement and causes and cut cross section and become large, and the shear pin shear force increases, and causes the actual pressurization value of well head to be greater than calculated value, produces larger error.
Due in part processing and manufacturing process several cut off hole and shear pin can not be in same plane, while exerting pressure on shear pin, shear pin is not simultaneously stressedly can produce the consequence of being defeated in detail, and causes the well head pressurization value to be less than calculated value.Its consequence be can produce detonate in advance, lag behind detonate, consequence that non-purpose oil reservoir detonates.
Therefore pressure-operated mechanism must have higher reliability and operation precision under pressure, avoids producing the economic loss that potential safety hazard and operation unsuccessfully cause.
While in the Oil/gas Well operation process, needing to open oil pipe and annulus access, generally adopt pump pressure type reverse circulation valve to realize, pump pressure type reverse circulation valve is also to complete being communicated with of oil pipe and annulus access by apply certain pressure at well mouth oil pipe.
The pressure-operated mechanism of former pump pressure type reverse circulation valve be equally adopt by. piston bush 1, shear pin 2 and shear the pressure-operated mechanism that 3 three basic parts of piston form.
Because the structure of the pressure-operated mechanism of pump pressure type reverse circulation valve is identical with the pressure excitation type detonating device actuating mechanism with principle, produce the reason of pressure error too, the same factor that produces potential safety hazard and operation failure due to pressure error that exists.Therefore the pressure-operated mechanism of pump pressure type reverse circulation valve needs too to have higher operation precision and meets the reliability of action under pressure, avoids producing the economic loss that potential safety hazard and operation unsuccessfully cause.
Summary of the invention
The technical problem solved
For fear of the deficiencies in the prior art part, the present invention proposes a kind of shearing chip pressure-operated mechanism, can substitute the shear pin formula pressure-operated mechanism adopted in original pressure excitation type detonating device and pump pressure type reverse circulation valve.This shearing sheet is pressed in piston bush by blank holder, shears sheet and can not produce the displacement of any direction when the shearing piston is sheared the shearing sheet under pressure, has improved and has applied the shear pressure precision, reduces well head pressurization error.
Technical scheme
A kind of pressure-operated for pressure blasting device and reverse circulation valve mechanism, is characterized in that comprising piston bush 1, blank holder 2, shear piston 3 and shear sheet 4; The internal diameter of piston bush 1 inner chamber has difference in internal diameters, forms a step, step, and step is provided with shears sheet 4, shears piston 3 and is positioned on shearing sheet 4, between piston bush 1 and shearing piston 3, is provided with blank holder 2.
Described shearing sheet is divided into external tooth and shears sheet and two kinds of structures of internal tooth shearing sheet.
The calculating n=P1+P of the shearing sheet number of teeth of described shearing sheet 4
peacethe mono-max[n of/P]>=N, wherein: n is for calculating number of teeth non integer value, and the mono-max of P is the monodentate development of maximum shear strength, and N is the number of teeth numerical value that rounds up, and P1 is that oil reservoir pushes up boundary's static pressure, P
peace/ be preset safe pressure value; The calculating of circle, described oil reservoir top static pressure: P1=Hg ρ (Mpa), wherein: H is initiator position vertical depth, ρ is that the liquid-tight degree of well gets 0.0098; The mono-max=PX of calculating P (1+3%) X (1-△ %) of described monodentate development of maximum shear strength (Mpa), wherein: △ % be the monodentate shear strength with increase in temperature strength decreased correction value, P is that monodentate calculates shear strength; Described monodentate calculates shear strength Ρ=A δ τ (Mpa), and wherein: A is the facewidth, and Δ is transverse tooth thickness, the limit shear strength that τ is the gear piece the selection of material utmost point.
Beneficial effect
A kind of pressure-operated for pressure blasting device and the reverse circulation valve mechanism that the present invention proposes, owing to having adopted the shear pin (Fig. 4) adopted in the alternative former pressure-operated of shearing sheet (Fig. 2 Fig. 3) mechanism with interior external tooth, to shear sheet (Fig. 2 Fig. 3) by blank holder 2 is pressed on the step plane of piston bush (Fig. 1), when institute's plus-pressure and well hydraulic coupling sum are greater than the shear strength limit of shear pin, formed pressure differential, shear pin is cut off, igniter cap clashes into gets angry, and the propagation of explosion sequence starts effect.Adopt this structure to eliminate the original structure shear pin and cut off the gap between hole, prevented that shear pin from doing the used time and be subjected to displacement the variation that produces the shear pin cross section because shear pin is stressed being subject to shearing force, simultaneously owing on the same plane of shearing sheet and be pressed on by blank holder piston bush, also having avoided former shear pinhole center not produce successively stressed situation of defeating in detail in same plane, thereby guarantee when shaft mouth operation by oil pipe or sleeve pipe applied pressure value and calculated value error in the allowable error scope, reach the minimizing error, improve the purpose of the safety and reliability of shaft mouth operation.
The accompanying drawing explanation
Fig. 1 shears chip priming device actuating mechanism sectional drawing
Fig. 2 shears sheet (external tooth) outline drawing
Fig. 3 shears sheet (internal tooth) outline drawing
Fig. 4 is the former shear pin formula actuating mechanism sectional drawing that detonates
Piston bush 1, blank holder 2, shearing piston 3, shearing sheet 4.
The specific embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
The former shear pin formula actuating mechanism of detonating, the principal element that produces applied pressure value and calculated value error in implementing well head pressure process has:
Produce displacement in 1 process that exerted pressure at well head by the shear pin of shearing force, the stressed cross section of shear pin becomes large, and the well head value of exerting pressure is greater than calculated value.
The detonate design feature of actuating mechanism of 2 shear pin formulas has determined manufacturing process, and shear pin can not be in same plane, shearing force apply in process form successively stressed rather than simultaneously stressed, thereby produce applied pressure value and calculated value error.
The present invention includes piston bush 1, blank holder 2, shear piston 3 and shear the actuating mechanism that sheet 4 forms for above-mentioned factor; The internal diameter of piston bush 1 inner chamber has difference in internal diameters, forms a step, step, and step is provided with shears sheet 4, shears piston 3 and is positioned on shearing sheet 4, between piston bush 1 and shearing piston 3, is provided with blank holder 2.
In specific implementation process, for the error that guarantees applied pressure value and calculated value is controlled in prescribed limit, piston bush will be controlled in 5% scope of shearing sheet thickness with the fit clearance of shearing piston.Adopt the blank holder compressing structure to guarantee to shear sheet and do not produce displacement under stressing conditions, stressed cross section does not change.
Shearing sheet is vital part of the present invention, shears internal tooth or the width of external tooth and the sectional area of being cut that thickness has determined each monodentate of sheet (Fig. 2 Fig. 3).
The mechanical performance of shearing the selected metal material of sheet has determined to shear the shear strength of sheet.
In the time of will considering in underground work when selecting shearing sheet metal material, environment temperature is on shearing the impact of sheet shear strength value.The present invention adopts silicon steel sheet as shearing the sheet preferred material, substitutes original low-carbon alloy steel.
Its objective is that silicon steel sheet is that a kind of fragile material is conducive to shear, its shear strength temperature influence is less simultaneously.Thickness, the facewidth and the number of teeth of shearing sheet according to the well hydrostatic pressure power capable of regulating of different depth position are adjusted the shear strength value of shearing sheet and are met the operation needs under different well depth conditions.
The embodiment calculated data:
1. the calculating of well hydraulic coupling value: P1=Hg ρ (Mpa)
In formula: circle, P1----oil reservoir top static pressure
H----initiator position vertical depth
ρ---the liquid-tight degree constant 0.0098 of-well
2. shear the sheet monodentate and calculate shear strength: Ρ=A δ τ (Mpa)
In formula: the P----monodentate calculates shear strength
The A----facewidth
δ---transverse tooth thickness
τ----gear piece the selection of material ultimate shearing strength
3. shear the calculating of the minimum shear strength of sheet monodentate:
The mono-min=PX of P (1-3%) X (1-△ %) (Mpa)
In formula: the minimum shear strength of the mono-min----monodentate of P
3%----allows the minimum shear strength error of monodentate
△ %---monodentate shear strength is with increase in temperature strength decreased correction value
4. shearing sheet monodentate development of maximum shear strength calculates:
The mono-max=PX of P (1+3%) X (1-△ %) (Mpa)
In formula: the mono-max----monodentate of P development of maximum shear strength
3%----allows monodentate development of maximum shear strength error
△ %---monodentate shear strength is with increase in temperature strength decreased correction value
5. shear the sheet Tooth Number Calculation: the mono-max[n of n=P1+7/P] >=N
In formula: n----calculates number of teeth non integer value
The N----number of teeth numerical value that rounds up
Circle, P1----oil reservoir top static pressure
The preset safe pressure value of 7---
6. the additional minimum pressure values of well head is calculated: the mono-min-P1 of PX=NX P (Mpa)
In formula: the additional minimum pressure values of Px----well head
7. the additional maximum pressure value of well head calculates: the mono-max-P1 of PS=NX P (Mpa)
In formula: the additional maximum pressure value of PS----well head
8. the additional calculating pressure value of well head: (PX+PS)/2 (Mpa
Owing to having adopted the shear pin (Fig. 4) adopted in the alternative former pressure-operated of shearing sheet (Fig. 2 Fig. 3) mechanism with interior external tooth, to shear sheet (Fig. 2 Fig. 3) by blank holder 2 is pressed on the step plane of piston bush (Fig. 1), when institute's plus-pressure and well hydraulic coupling sum are greater than the shear strength limit of shear pin, formed pressure differential, shear pin is cut off, igniter cap clashes into gets angry, and the propagation of explosion sequence starts effect.Adopt this structure to eliminate the original structure shear pin and cut off the gap between hole, prevented that shear pin from doing the used time and be subjected to displacement the variation that produces the shear pin cross section because shear pin is stressed being subject to shearing force, simultaneously owing on the same plane of shearing sheet and be pressed on by blank holder piston bush, also having avoided former shear pinhole center not produce successively stressed situation of defeating in detail in same plane, thereby guarantee when shaft mouth operation by oil pipe or sleeve pipe applied pressure value and calculated value error in the allowable error scope, reach the minimizing error, improve the purpose of the safety and reliability of shaft mouth operation.
Claims (3)
1. the mechanism of the shearing pressure pressure-operated for pressure blasting device and reverse circulation valve, is characterized in that comprising piston bush (1), blank holder (2), shear piston 3 and shear sheet (4); The internal diameter of piston bush (1) inner chamber has difference in internal diameters, forms a step, step, and step is provided with shears sheet (4), shears piston (3) and is positioned at shearing sheet (4) above, between piston bush (1) and shearing piston (3), is provided with blank holder 2.
2. according to claim 1 for the shearing pressure pressure-operated mechanism of pressure blasting device and reverse circulation valve, it is characterized in that: described shearing sheet is divided into that external tooth is sheared sheet and internal tooth is sheared two kinds of structures of sheet.
3. according to claim 1 for the shearing pressure pressure-operated mechanism of pressure blasting device and reverse circulation valve, it is characterized in that: the calculating n=P1+P of the shearing sheet number of teeth of described shearing sheet (4)
peacethe mono-max[n of/P]>=N, wherein: n is for calculating number of teeth non integer value, and the mono-max of P is the monodentate development of maximum shear strength, and N is the number of teeth numerical value that rounds up, and P1 is that oil reservoir pushes up boundary's static pressure, P
peace/ be preset safe pressure value; The calculating of circle, described oil reservoir top static pressure: P1=Hg ρ (Mpa), wherein: H is initiator position vertical depth, ρ is that the liquid-tight degree of well gets 0.0098; The mono-max=PX of calculating P (1+3%) X (1-△ %) of described monodentate development of maximum shear strength (Mpa), wherein: △ % be the monodentate shear strength with increase in temperature strength decreased correction value, P is that monodentate calculates shear strength; Described monodentate calculates shear strength Ρ=A δ τ (Mpa), and wherein: A is the facewidth, and Δ is transverse tooth thickness, the limit shear strength that τ is the gear piece the selection of material utmost point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103262073A CN103437743A (en) | 2013-07-30 | 2013-07-30 | Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103262073A CN103437743A (en) | 2013-07-30 | 2013-07-30 | Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103437743A true CN103437743A (en) | 2013-12-11 |
Family
ID=49691449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103262073A Pending CN103437743A (en) | 2013-07-30 | 2013-07-30 | Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103437743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382105A (en) * | 2016-11-03 | 2017-02-08 | 西安物华巨能爆破器材有限责任公司 | High temperature pressurization device used for propagation of explosion of oil and gas well interlayer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6102126A (en) * | 1998-06-03 | 2000-08-15 | Schlumberger Technology Corporation | Pressure-actuated circulation valve |
| CN101270645A (en) * | 2008-05-16 | 2008-09-24 | 中国兵器工业第二一三研究所 | Pressure excitation type detonating device capable of displaying starting signal |
| CN201907221U (en) * | 2010-12-09 | 2011-07-27 | 江苏金方圆数控机床有限公司 | Overload protective device of numerical control punch |
| CN203476301U (en) * | 2013-07-30 | 2014-03-12 | 西安物华巨能爆破器材有限责任公司 | Shear type pressure action mechanism |
-
2013
- 2013-07-30 CN CN2013103262073A patent/CN103437743A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6102126A (en) * | 1998-06-03 | 2000-08-15 | Schlumberger Technology Corporation | Pressure-actuated circulation valve |
| CN101270645A (en) * | 2008-05-16 | 2008-09-24 | 中国兵器工业第二一三研究所 | Pressure excitation type detonating device capable of displaying starting signal |
| CN201907221U (en) * | 2010-12-09 | 2011-07-27 | 江苏金方圆数控机床有限公司 | Overload protective device of numerical control punch |
| CN203476301U (en) * | 2013-07-30 | 2014-03-12 | 西安物华巨能爆破器材有限责任公司 | Shear type pressure action mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 陆大为: "《油气井射孔技术》", 31 May 2012 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382105A (en) * | 2016-11-03 | 2017-02-08 | 西安物华巨能爆破器材有限责任公司 | High temperature pressurization device used for propagation of explosion of oil and gas well interlayer |
| CN106382105B (en) * | 2016-11-03 | 2018-11-02 | 西安物华巨能爆破器材有限责任公司 | A kind of oil/gas well interlayer propagation of explosion high temperature pressurised device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016070187A4 (en) | Setting tool for downhole applications | |
| BRPI0415238A (en) | reactive hollow charge overlay, hollow charge drill, drill gun and methods of completing an oil or gas well and improving fluid outflow from a well | |
| GB2534679A (en) | An output member | |
| CN103437743A (en) | Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve | |
| CN203476301U (en) | Shear type pressure action mechanism | |
| CN104989336B (en) | Perforating oil gas well detonation unlock energy-stored spring percussion lock | |
| CN101270645B (en) | Pressure excitation type detonating device capable of displaying starting signal | |
| NO20181575A1 (en) | High temperature initiator | |
| CN105888625A (en) | Piston-spring type perforating gun expansion prevention and protection device | |
| CN204609850U (en) | One can repeat pressure drilling controller | |
| Zeng et al. | Reasonable location parameters of pick and nozzle in combined cutting system | |
| CN203640681U (en) | Bridge plug setting tool and bridge plug setting device employing same | |
| CN103010423B (en) | Fast explosive sunken ship cutting device | |
| CN103089202A (en) | Tension bar type pressure exploder | |
| GB2448438A (en) | Method and device for detonating an explosive charge | |
| CN108237376A (en) | A kind of processing method of explosion overlength carbon dioxide fracturing pipe | |
| CN2844431Y (en) | Pressure blasting/perforating composite device | |
| CN106051243A (en) | Quick response safety valve adopting nonlinear regulating spring | |
| CN203130055U (en) | Pressure differential detonating device for perforating operation of oil and gas wells | |
| CN202562381U (en) | Delay element group pressure system | |
| Vorontsov et al. | Development of a new theory of cutting 7. Mathematical description of the formation of different chips, pulsation of the cutting force, and contact parameters of the machined billet surface and the rear cutter surface | |
| CN104806210A (en) | Jet flow energization explosion-propagating device for module perforating gun and application method | |
| RU137331U1 (en) | DEVICE FOR PROTECTING A CUMULATIVE PUNCHER FROM AN UNAUTHORIZED INITIATION | |
| CN203050650U (en) | Tension stick type pressure detonating device | |
| CN113033113B (en) | Prediction method for movement space size of perforating fluid of packing section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131211 |