CN106761554B - Pressure release device for casing trap space of deep water oil gas well - Google Patents
Pressure release device for casing trap space of deep water oil gas well Download PDFInfo
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- CN106761554B CN106761554B CN201611182946.XA CN201611182946A CN106761554B CN 106761554 B CN106761554 B CN 106761554B CN 201611182946 A CN201611182946 A CN 201611182946A CN 106761554 B CN106761554 B CN 106761554B
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- pressure
- relief device
- pressure relief
- valve
- sleeve pipe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000005336 cracking Methods 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 18
- 239000004215 Carbon black (E152) Substances 0.000 claims description 17
- 229930195733 hydrocarbon Natural products 0.000 claims description 17
- 150000002430 hydrocarbons Chemical class 0.000 claims description 17
- 210000004907 gland Anatomy 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 10
- 239000004615 ingredient Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pressure release device for a casing confining space of a deep water oil and gas well and a well completion well body structure of the deep water oil and gas well. The pressure relief device includes: a main body fixedly mounted on the outer wall of the sleeve; the main body is provided with a cavity communicated with the interior of the sleeve; the main body is provided with an overflowing channel for communicating the cavity with the trap space; the elastic piece, the valve body and the valve seat are arranged in the cavity; the valve body seals and blocks the valve seat under the action of the elastic piece; the elastic piece applies an initial opening pressure to the valve body; when the pressure of the valve body in the trapping space is greater than the initial opening pressure, the valve body opens the valve seat, so that the trapping space is communicated with the interior of the sleeve; when the pressure of the valve body in the trapping space is smaller than the initial opening pressure, the valve body seals the valve seat, so that the trapping space is not communicated with the interior of the sleeve.
Description
Technical field
The present invention relates to deep water high temperature and pressure oil/gas well the field of test technology more particularly to a kind of use deepwater subsea well mouths
A kind of pressure release in deep water hydrocarbon casing trap space of complete well and the well structure design with casing trap space
The completion interval of well body structure of device and its deep water hydrocarbon well.
Background technique
The complete well of deep water hydrocarbon well well head generallys use underwater completion mode, and well-completing process is totally different from completion method
Land or shallow sea oil/gas well.During the construction technology of the complete well of deep water, the cement of multilayer intermediate casing returns height and usually returns to mud face
Following certain altitude, i.e. intermediate technology casing need the free segment of certain length, to cause part completion fluid by trap in well
Mouth sealing ring, cement return annular space defined by high face and intermediate casing.Different from the dry type well head on land and shallow water, deep water
Using underwater well head, the release of annular pressure can not be carried out in production and test process, and then wellbore integrity can be brought
Serious harm.
In deep water hydrocarbon well test or production process, high temperature and pressure formation fluid flows through pit shaft from oil pipe, heated
Trap fluid in each trap space, trap space fluid expanded by heating between each layer casing and the additonal pressure load that generates,
It easily leads to casing collapse, the downhole safeties accident such as casing is split up, alter on underwater well head, wellhead sealing failure, gives safety in production band
Carry out hidden trouble.
Existing deep water trapped pressure control technology measure mainly has: foam technology, rupture disk technology and cementing concrete
Return high control technology etc..Main problem using rupture disk technology is to destroy the integrality of cased borehole, using foamed material
The main bugbear of technology is that foamed material is strapped on sleeve outer wall, due to foamed material itself intensity and tripping in during
The deep water riser and down-hole casing of excess lengths are worn, foamed material abrasion chip off-falling is easily sent out in work progress, entirety falls off, tripping in
A series of technical problems such as inaccurate are positioned, the risk of deepwater drilling operation is increased.Cementing concrete returns high control technology, due to depth
Water well cementation Intensity Design requirement and limit its extent of spreading amd application.
Summary of the invention
In view of the deficiencies in the prior art, the object of the present invention is to provide a kind of pressure in deep water hydrocarbon casing trap space
The completion interval of well body structure of release device and its deep water hydrocarbon well, during it effectively can evade oil and gas well testing, because of high temperature height
Pressure formation fluid flows through pit shaft and causes to generate destructive extra heat stress in casing trap space, to realize that deep water high temperature is high
The safety of the casing multilayer trap annular space (trap space) in test process is pressed, ensures the test completeness of deep water pit shaft.
The present invention solves the above technical problem using following technical scheme:
A kind of pressure relief device for casing trap space, the trap are spatially located at the wellhead sealing of oil/gas well
Circle, cement return high face, and are located at outside described sleeve pipe；The pressure relief device includes:
It is capable of fixing the main body being installed on described sleeve pipe outer wall；The main body is equipped with the chamber being passed through inside described sleeve pipe；
The main body is equipped with the flow channels for being connected to the chamber and the trap space；
It is set to the indoor elastic component of the chamber, valve body and valve seat；The valve body blocks under the action of the elastic component
The valve seat；The elastic component is applied to the initial cracking pressure of the valve body one；
When pressure of the valve body in the trap space is greater than the initial cracking pressure, described in the valve body opening
Valve seat, to make to be connected to inside trap space and described sleeve pipe；
When pressure of the valve body in the trap space is less than the initial cracking pressure, described in the valve body closure
Valve seat, so that trap space be made not to be connected to inside described sleeve pipe.
As a preferred embodiment, the original state of the elastic component is compressive state.
As a preferred embodiment, the valve seat is set to one end of the chamber；The valve seat has opposite
Pair first end and second end；
The end face of the first end of the valve seat is equipped with the groove extended to second end；The flow channels and the groove phase
Connection；
The valve seat is provided with flowing hole perforative between the bottom of the groove and the end face of second end；The valve body
The flowing hole can be blocked.
As a preferred embodiment, the valve body includes the valve ball for blocking the overcurrent bore ends；The valve ball
Quantity it is equal with the quantity of the flowing hole.
As a preferred embodiment, the other end of chamber described in one end contact of the elastic component, the elasticity
One gland of other end contact of part；The gland pushes the valve ball to block the flowing hole.
As a preferred embodiment, being provided with valve ball limit pad between the gland and the second end of the valve seat
Piece；The valve ball spacing shim is equipped with the limiting through hole for limiting the valve ball；The limiting through hole, the valve ball and described
Flowing hole is arranged in a one-to-one correspondence.
As a preferred embodiment, the elastic component is sheathed on the one end of the gland far from the valve seat.
As a preferred embodiment, the elastic component is connected with spring base far from one end of the valve seat.
As a preferred embodiment, the deformation direction of the elastic component is identical as the length direction of the chamber.
As a preferred embodiment, the elastic component is cylindrical spring.
As a preferred embodiment, being additionally provided with force adjustment mechanism in the chamber；The force adjustment mechanism can be adjusted
The size of the initial cracking pressure.
As a preferred embodiment, the force adjustment mechanism includes be set to the elastic component and the chamber interior
Gasket is adjusted between wall；The thickness of the adjustment gasket is adjustable.
As a preferred embodiment, the flow channels are provided with test interface far from one end of the chamber；
The test interface is for measuring the initial cracking pressure.
A kind of completion interval of well body structure of deep water hydrocarbon well, comprising: casing, sealing washer of well head；
Described sleeve pipe is externally provided with trap space, the trap is spatially located at the sealing washer of well head and cement return high face it
Between；Described sleeve pipe is equipped with sleeve through hole；The release of pressure described in any embodiment as above is provided in the trap space
Device；Described sleeve pipe through-hole is passed through the chamber of the pressure relief device.
As a preferred embodiment, the body seal of the pressure relief device is welded on the outer wall of described sleeve pipe
On.
As a preferred embodiment, described sleeve pipe includes production string, intermediate casing；The intermediate casing is arranged
In outside the production string；Surface pipe is arranged with outside the intermediate casing；
The outer wall of the production string is provided with the pressure relief device；The outer wall of the intermediate casing is provided with described
Pressure relief device.
As a preferred embodiment, the initial unlatching for the pressure relief device being set on the intermediate casing is pressed
Power is greater than 3 to 5 megapascal of initial cracking pressure for the pressure relief device being set on the production string.
As a preferred embodiment, the fluid between the production string and the intermediate casing in trap space
It is only capable of unidirectionally flowing into the production string through the pressure relief device；It is enclosed between the intermediate casing and the surface pipe
It closes the fluid in space and is only capable of unidirectionally flowing into the intermediate casing through the pressure relief device.
As a preferred embodiment, the length direction of the chamber of the pressure relief device and the axis of described sleeve pipe
To parallel.
As a preferred embodiment, the valve body of described sleeve pipe through-hole and the pressure relief device is along described sleeve pipe
Radially aligned.
As a preferred embodiment, the pressure relief device energy righting described sleeve pipe.
By above description as can be seen that at the beginning of pressure relief device provided by the invention is applied to valve body one by elastic component
Beginning cracking pressure, so that the fluid in trap space can only unidirectionally discharge the additional thermal pressure generated because temperature increases, and
After thermal pressure release, valve body is closed rapidly under the action of the elastic member, ensure that the wellbore integrity of deep water hydrocarbon well.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without any creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the completion interval of well body structure schematic diagram for the deep water hydrocarbon well that one embodiment of the present invention provides；
Fig. 2 is Fig. 1 middle sleeve pipe nipple structural schematic diagram；
Fig. 3 is the structure of pressure relief device schematic diagram in Fig. 2；
Fig. 4 is the enlarged drawing of partial pressure release device structure in Fig. 3.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to guarantor of the present invention
The range of shield.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
Any and all combinations of relevant listed item.
A kind of deep water hydrocarbon casing trap space 5 provided referring to FIG. 1 to FIG. 4, for one embodiment of the present invention
4 structural schematic diagram of pressure relief device.As shown in Figure 1, the trap space 5 is located at sealing washer of well head 2, the cement of oil/gas well
High face 3 (cement that complete well pours is back in casing 1 and is formed by top surface) is returned, and is located at outside described sleeve pipe 1.
The pressure relief device 4 includes: the main body 41 for being capable of fixing and being installed on 1 outer wall of described sleeve pipe；The main body 41
Equipped with the chamber 410 being passed through inside described sleeve pipe 1；The main body 41, which is equipped with, is connected to the chamber 410 and the trap space 5
Flow channels 46；Elastic component 44, valve body 42 and the valve seat 43 being set in the chamber 410；The valve body 42 is in the bullet
The valve seat 43 is blocked under the action of property part 44；The elastic component 44 is applied to the initial cracking pressure of the valve body 42 1；It is described
When pressure of the valve body 42 in the trap space 5 is greater than the initial cracking pressure, the valve body 42 opens the valve seat 43,
To make to be connected to inside trap space 5 and described sleeve pipe 1；Pressure of the valve body 42 in the trap space 5 is less than described
When initial cracking pressure, the valve body 42 blocks the valve seat 43, to make not to be connected to inside trap space 5 and described sleeve pipe 1.
When the fluid in 1 trap space 5 of casing because temperature increase generate additonal pressure arrive initial cracking pressure when, trap sky
Between fluid in 5 enter valve seat 43 along the flow channels 46 of main body 41, initial open pressure since the pressure in trap space 5 is greater than
Power so that micro-displacement occurs for valve body 42, at this moment, segment fluid flow in annular space trap space 5 will along valve seat 43 through chamber 410 into
Enter in the relatively low pressure space of casing 1, so that reaching pressure balance inside and outside casing 1.Fluid pressure in trap space 5
Not up to the initial cracking pressure of valve body 42 when, valve body 42 elastic component 44 effect under be in close state always, to block
The connectivity of 1 interior or exterior space of casing.
By above description as can be seen that the pressure relief device 4 that present embodiment provides is applied to by elastic component 44
The initial cracking pressure of valve body 42 1, so that the fluid in trap space 5 can only unidirectionally discharge the adding for generating due to temperature raising
Thermal pressure, and thermal pressure release after, valve body 42 is closed rapidly under the action of elastic component 44, ensure that deep water hydrocarbon well
Wellbore integrity.
As shown in Figure 2 and Figure 3, in the present embodiment, main body 41 can be the shell of pressure relief device 4, can pacify
On outer wall loaded on casing 1.The shape of main body 41 can have it is a variety of, for example, the shape of main body 41 can be regular block (square
Shape block, tube body etc.), or irregular shape.For the high temperature and high pressure environment for adapting to underground, the material of main body 41 is preferably
Metal, such as main body 41 are steel.Meanwhile main body 41 can be welded on the outer wall of casing 1, wherein the outer periphery of main body 41
Pass through 50 connecting sleeve 1 of weld seam.
Preferably, the pressure relief device 4 can righting described sleeve pipe 1.Specifically, the pressure relief device 4
Main body 41 vertical section be it is trapezoidal；The trapezoidal long side connects described sleeve pipe 1, and short side is opposite with the long side.Such as Fig. 2 institute
Show, when pressure relief device 4 is installed on sleeve pipe nipple 1, the outer diameter where the outer edge surface of main body 41 is entire casing nipple 1
Maximum outside diameter, thus when casing 1 is gone into the well to casing 1 carry out righting.Specifically, along casing 1 circumferential direction can be set it is more
A pressure relief device 4, multiple pressure relief devices 4 are evenly distributed in the circumferential direction of casing 1.
Main body 41 is equipped with the chamber 410 for accommodating valve body 42 and valve seat 43.Wherein, valve body 42 can act in chamber 410.
For the shape of chamber 410, also there is no restriction in present embodiment, can be cylindrical chamber 410, or annular compartment
410 etc., it can be adapted with the shape of main body 41.
In the present embodiment, the length direction of chamber 410 can be consistent with the deformation direction of elastic component 44.Such as Fig. 3
Shown, the length direction of chamber 410 is parallel with the axial direction of casing 1, and elastic component 44 can be stretched in the length direction of chamber 410
Contracting.When scope of readers is to Fig. 3, elastic component 44 is to stretch up and down, and the length direction of chamber 410 is up and down direction；Main body 41 is indulged
The long side and the right distribution of one the first from left of short side of section.
In the present embodiment, the original state of elastic component 44 can be tensional state, or compressive state, thus
Apply an initial cracking pressure on valve body 42.For convenience of manufacture, the original state of the elastic component 44 is compressive state.Pass through
The decrement of control elastic component 44 can control the initial cracking pressure of valve body 42.
As shown in figure 4, in the present embodiment, the valve seat 43 is set to one end of the chamber 410；The valve seat 43
With opposite facing first end (lower end in Fig. 4) and second end (upper end in Fig. 4)；The end face of the first end of the valve seat 43
Equipped with the groove 431 extended to second end；The flow channels 46 are connected with the groove 431；The valve seat 43 is provided with
By flowing hole 432 perforative between the bottom of the groove 431 and the end face of second end；The valve body 42 can be by the flowing hole
432 block.
As shown in figure 4, the lower end of the chamber 410 is equipped with installation step, the expanding formation valve seat 43 of the second end of valve seat 43
Head.The first end of valve seat 43 protrudes into installation step, and 43 mounted step-shaped tops of valve seat support.Wherein, valve seat 43 and erecting bed
It is equipped with sealing ring 2 between rank, will be sealed between 410 inner wall of valve seat 43 and chamber.
The groove 431 of valve seat 43 is communicated by flow channels 46 with trap space 5.Wherein, flow channels 46 are set to master
The lower end of body 41.As shown in figure 3, flow channels 46 are linear type runner.Flowing hole 432 is set to the bottom of groove 431 and the
Between the end face at two ends, wherein flowing hole 432 runs through valve seat 43.Wherein, the pore size of flowing hole 432 is far smaller than
The pore size of groove 431, so as to limit the amount of fluid in flowing hole 432, the fluid for avoiding trap space 5 excessive is flowed into
In casing 1, the wellbore integrity for destroying deep water hydrocarbon well is prevented.
In the present embodiment, the valve body 42 includes the valve ball 42 for blocking 432 end of flowing hole；The valve ball 42
Quantity it is equal with the quantity of the flowing hole 432.Certainly, valve body 42 or other constructions, such as bullet, terrace with edge etc.
Deng.
In the present embodiment, the other end of chamber 410 described in one end contact of the elastic component 44, the elastic component 44
One gland 45 of other end contact；The gland 45 pushes the valve ball 42 to block the flowing hole 432.Wherein, flowing hole 432
And valve ball 42 can be uniformly pressed on the upper end of flowing hole 432 by gland 45 in the case where multiple by the quantity of valve ball 42
(when with scope of readers to Fig. 3).
It is excessive for the aperture after preventing valve ball 42 from being opened, and the integrality of shaft structure is destroyed, the gland 45 and institute
It states and is provided with valve ball spacing shim 51 between the second end of valve seat 43.The valve ball spacing shim 51, which is equipped with, limits the valve
The limiting through hole (not indicating) of ball 42.The limiting through hole, the valve ball 42 and the flowing hole 432 are arranged in a one-to-one correspondence.
Wherein, valve ball 42 is located in limiting through hole, which can limit the mobility of valve ball 42.It is enclosed in valve ball 42
The pressure for closing space 5 opens move a certain distance after, which can limit valve ball 42 and continue to move up；In venting pressure
Afterwards, gland 45 pushes valve ball 42 under the contact effect of elastic component 44, again blocks flowing hole 432 again.
The lower end contact gland 45 of elastic component 44, the upper end of other end contact chamber 410.To prevent gland 45 and elastic component
It is disengaged between 44, as shown in figure 3, the elastic component 44 is sheathed on the one end of the gland 45 far from the valve seat 43.The bullet
Property part 44 is connected with spring base 47 far from one end of the valve seat 43.
In the present embodiment, the deformation direction of the elastic component 44 is identical as the length direction of the chamber 410.It is described
Elastic component 44 is preferably cylindrical spring.Certainly, elastic component 44 can also be tower-shaped elasticity, wind spring etc..
In the present embodiment, it is the adaptation scene ability of adherence pressure release device 4, accurately controls pressure relief device
4 unlatching opportunity is also provided with force adjustment mechanism in the chamber 410；The force adjustment mechanism can adjust the initial unlatching
The size of pressure.Wherein, force adjustment mechanism can be adjusted by adjusting initial compression length or the initial tensile length of elastic component 44
Save the initial cracking pressure.Specifically, the force adjustment mechanism may include being set to the elastic component 44 and the chamber 410
Inner wall between adjust gasket 48；The thickness of the adjustment gasket 48 is adjustable.As shown in figure 3, adjustment gasket 48 is set to spring
Between seat 47 and the inner wall of chamber 410.
The flow channels 46 are provided with test interface 49 far from one end of the chamber 410；The test interface 49 is used
In the measurement initial cracking pressure.Wherein, the test interface 49 can connect test equipment, and test equipment passed through circulation
Road 46 is suppressed into chamber 410, and whether test valve body 42 is opened too early or opened too late, to test pressure relief device 4
Whether initial cracking pressure is setting value.When initial cracking pressure inaccuracy is arrived in test, passes through above-mentioned force adjustment mechanism and adjust bullet
The original state of spring.
Another embodiment of the present invention also provides a kind of completion interval of well body knot of deep water hydrocarbon well referring to FIG. 1 to FIG. 4,
Structure, the completion interval of well body structure of the deep water hydrocarbon well include: casing 1, sealing washer of well head 2；Described sleeve pipe 1 is externally provided with trap space 5,
The trap space 5 is located at the sealing washer of well head 2 and cement returns between high face 3；Described sleeve pipe 1 is equipped with sleeve through hole 10；
Pressure relief device 4 described in any embodiment is provided in the trap space 5；Described sleeve pipe through-hole 10 is passed through described
The chamber 410 of pressure relief device 4.
In the present embodiment, the shape of pressure relief device 4, construction and its function can be refering to above embodiment
In pressure relief device 4, no longer repeat one by one in present embodiment.
In the present embodiment, pressure relief device 4 (centre setting gasket) can pacify by bolted connection
On casing 1, the other modes such as riveting can also be passed through.Preferably, 41 sealing welding of main body of the pressure relief device 4
On the outer wall of described sleeve pipe 1.Wherein, the valve body 42 of described sleeve pipe through-hole 10 and the pressure relief device 4 is along described sleeve pipe 1
Radially aligned.
Described sleeve pipe 1 includes production string 11, intermediate casing 12.The intermediate casing 12 is sheathed on the production string 11
Outside.Surface pipe 15 is arranged with outside the intermediate casing 12.The outer wall of the production string 11 is provided with the pressure release dress
Set 4.The outer wall of the intermediate casing 12 is provided with the pressure relief device 4.
Wherein, the fluid between the production string 11 and the intermediate casing 12 in trap space is discharged through the pressure
Device 4 is only capable of unidirectionally flowing into the production string 11.Trap space between the intermediate casing 12 and the surface pipe 15
Interior fluid is only capable of unidirectionally flowing into the intermediate casing 12 through the pressure relief device 4.
In the present embodiment, the initial cracking pressure for being set to the pressure relief device 4 on the intermediate casing 12 is big
In the initial cracking pressure for the pressure relief device 4 being set on the production string 11.Specifically, being set to the intermediate sleeve
The initial cracking pressure of pressure relief device 4 on pipe 12 is greater than the pressure relief device 4 being set on the production string 11
3 to 5 megapascal of initial cracking pressure.For example, the initial unlatching for the pressure relief device 4 being set on the intermediate casing 12 is pressed
Power is 55 megapascal；The initial cracking pressure for being set to the pressure relief device 4 on the production string 11 is 50 megapascal.
The description of a upper embodiment is accepted, the pressure relief device 4 can righting described sleeve pipe 1.Wherein, the pressure
The vertical section of the main body 41 of release device 4 is trapezoidal；The trapezoidal long side connects described sleeve pipe 1, short side and the long side phase
It is right.
Herein cited any digital value all include between lower limit value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity an of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These are only intended to the example clearly expressed, it is believed that all possibility for the numerical value enumerated between minimum and peak
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all ranges all include all numbers between endpoint and endpoint.It is used together with range
" about " or " approximation " be suitable for two endpoints of the range.Thus, " about 20 to 30 " are intended to cover that " about 20 to about
30 ", including at least the endpoint indicated.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.Describing combined term " substantially by ... constitute " should include identified element, ingredient, component or step and reality
Other elements, ingredient, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, component
Or the embodiment that step is constituted.Here by using term " can with ", it is intended to illustrate that " can with " includes described any
Attribute is all optional.
Multiple element, ingredient, component or step can be provided by single integrated component, ingredient, component or step.Optionally
Ground, single integrated component, ingredient, component or step can be divided into multiple element, ingredient, component or the step of separation.It is used to
The open "a" or "an" for describing element, ingredient, component or step is not said to exclude other elements, ingredient, component
Or step.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to appended claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of benefit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as inventor the theme is not thought of as it is disclosed
A part of subject matter.
Claims (16)
1. a kind of pressure relief device in deep water hydrocarbon casing trap space, the well head that the trap is spatially located at oil/gas well are close
High face is returned in seal, cement, and is located at outside described sleeve pipe；It is characterized in that, the pressure relief device includes:
It is capable of fixing the main body being installed on described sleeve pipe outer wall；The main body is equipped with the chamber being passed through inside described sleeve pipe；It is described
Main body is equipped with the flow channels for being connected to the chamber and the trap space；
It is set to the indoor elastic component of the chamber, valve body and valve seat；Described in the valve body blocks under the action of the elastic component
Valve seat；The elastic component is applied to the initial cracking pressure of the valve body one；
When pressure of the valve body in the trap space is greater than the initial cracking pressure, the valve body opens the valve
Seat, to make to be connected to inside trap space and described sleeve pipe；
When pressure of the valve body in the trap space is less than the initial cracking pressure, the valve body blocks the valve
Seat, so that trap space be made not to be connected to inside described sleeve pipe；
The original state of the elastic component is compressive state；
The valve seat is set to one end of the chamber；The valve seat has opposite facing first end and second end；
The end face of the first end of the valve seat is equipped with the groove extended to second end；The flow channels are connected with the groove
It is logical；
The valve seat is provided with flowing hole perforative between the bottom of the groove and the end face of second end；The valve body can incite somebody to action
The flowing hole blocks；
The valve body includes the valve ball for blocking the overcurrent bore ends；The quantity phase of the quantity of the valve ball and the flowing hole
Deng；
The other end of chamber described in one end contact of the elastic component, one gland of other end contact of the elastic component；The pressure
Lid pushes the valve ball to block the flowing hole；
Valve ball spacing shim is provided between the gland and the second end of the valve seat；The valve ball spacing shim is equipped with limit
The limiting through hole of the position valve ball；The limiting through hole, the valve ball and the flowing hole are arranged in a one-to-one correspondence.
2. pressure relief device as described in claim 1, it is characterised in that: the elastic component is sheathed on the gland far from institute
State one end of valve seat.
3. pressure relief device as described in claim 1, it is characterised in that: the elastic component connects far from one end of the valve seat
It is connected to spring base.
4. pressure relief device as described in claim 1, it is characterised in that: the deformation direction of the elastic component and the chamber
Length direction it is identical.
5. pressure relief device as described in claim 1, it is characterised in that: the elastic component is cylindrical spring.
6. pressure relief device as described in claim 1, it is characterised in that: be additionally provided with force adjustment mechanism in the chamber；It is described
Force adjustment mechanism can adjust the size of the initial cracking pressure.
7. pressure relief device as claimed in claim 6, it is characterised in that: the force adjustment mechanism includes being set to the elasticity
Adjustment gasket between part and the inner wall of the chamber；The thickness of the adjustment gasket is adjustable.
8. pressure relief device as described in claim 1, it is characterised in that: the one end of the flow channels far from the chamber
It is provided with test interface；The test interface is for measuring the initial cracking pressure.
9. a kind of completion interval of well body structure of deep water hydrocarbon well characterized by comprising casing, sealing washer of well head；
Described sleeve pipe is externally provided with trap space, and the trap is spatially located at the sealing washer of well head and cement returns between high face；Institute
Casing is stated equipped with sleeve through hole；Pressure release dress as described in any of the claims 1 to 8 is provided in the trap space
It sets；Described sleeve pipe through-hole is passed through the chamber of the pressure relief device.
10. completion interval of well body structure as claimed in claim 9, it is characterised in that: the body seal of the pressure relief device is welded
It connects on the outer wall of described sleeve pipe.
11. completion interval of well body structure as claimed in claim 9, it is characterised in that: described sleeve pipe includes production string, intermediate sleeve
Pipe；The intermediate casing is sheathed on outside the production string；Surface pipe is arranged with outside the intermediate casing；
The outer wall of the production string is provided with the pressure relief device；The outer wall of the intermediate casing is provided with the pressure
Release device.
12. completion interval of well body structure as claimed in claim 11, it is characterised in that: the pressure being set on the intermediate casing is released
The initial cracking pressure for putting device is greater than the initial cracking pressure 3 to 5 for the pressure relief device being set on the production string
Megapascal.
13. completion interval of well body structure as claimed in claim 11, it is characterised in that: the production string and the intermediate casing it
Between fluid in trap space be only capable of unidirectionally flowing into the production string through the pressure relief device；The intermediate casing with
Fluid between the surface pipe in trap space is only capable of unidirectionally flowing into the intermediate casing through the pressure relief device.
14. completion interval of well body structure as claimed in claim 9, it is characterised in that: the length of the chamber of the pressure relief device
Direction is axial parallel with described sleeve pipe.
15. completion interval of well body structure as claimed in claim 9, it is characterised in that: described sleeve pipe through-hole and pressure release fill
Radially aligned of the valve body set along described sleeve pipe.
16. completion interval of well body structure as claimed in claim 9, it is characterised in that: covered described in the pressure relief device energy righting
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182946.XA CN106761554B (en) | 2016-12-20 | 2016-12-20 | Pressure release device for casing trap space of deep water oil gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182946.XA CN106761554B (en) | 2016-12-20 | 2016-12-20 | Pressure release device for casing trap space of deep water oil gas well |
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| CN106761554A CN106761554A (en) | 2017-05-31 |
| CN106761554B true CN106761554B (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611182946.XA Active CN106761554B (en) | 2016-12-20 | 2016-12-20 | Pressure release device for casing trap space of deep water oil gas well |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701147B (en) * | 2017-10-26 | 2023-11-10 | 中国石油大学(北京) | Annulus pressure underground control valve |
| CN108412458B (en) * | 2018-03-16 | 2023-06-30 | 中国海洋石油集团有限公司 | Bidirectional controllable deepwater annular trap pressure relief device and method |
| CN108843272B (en) * | 2018-06-19 | 2020-06-30 | 中国海洋石油集团有限公司 | Recoverable pressure relief tool for releasing annular confining pressure and well completion well structure |
| CN108868692B (en) * | 2018-06-19 | 2020-04-28 | 中国海洋石油集团有限公司 | Casing additional cavity pressure relief device for deepwater annulus trapping pressure treatment |
| CN114961645B (en) * | 2022-05-23 | 2023-03-10 | 西南石油大学 | Multi-activation bidirectional pressure relief device and method for releasing annular trapping pressure of sleeve |
| CN114961643B (en) * | 2022-06-01 | 2023-05-23 | 西南石油大学 | Recoverable pressure relief device and method for releasing annular entrapment pressure of casing |
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| CN101506465A (en) * | 2005-11-18 | 2009-08-12 | 雪佛龙美国公司 | Controlling the pressure within an annular volume of a wellbore |
| CN102216557A (en) * | 2008-11-18 | 2011-10-12 | 雪佛龙美国公司 | Systems and methods for mitigating annular pressure buildup in an oil or gas well |
| CN102808592A (en) * | 2011-05-31 | 2012-12-05 | 韦特柯格雷公司 | Annulus vent system for subsea wellhead assembly |
| CN202745837U (en) * | 2012-07-04 | 2013-02-20 | 中国石油天然气股份有限公司 | Natural energy circulation gas lift well completion pipe string |
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| US6457528B1 (en) * | 2001-03-29 | 2002-10-01 | Hunting Oilfield Services, Inc. | Method for preventing critical annular pressure buildup |
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| CN101506465A (en) * | 2005-11-18 | 2009-08-12 | 雪佛龙美国公司 | Controlling the pressure within an annular volume of a wellbore |
| CN102216557A (en) * | 2008-11-18 | 2011-10-12 | 雪佛龙美国公司 | Systems and methods for mitigating annular pressure buildup in an oil or gas well |
| CN102808592A (en) * | 2011-05-31 | 2012-12-05 | 韦特柯格雷公司 | Annulus vent system for subsea wellhead assembly |
| CN202745837U (en) * | 2012-07-04 | 2013-02-20 | 中国石油天然气股份有限公司 | Natural energy circulation gas lift well completion pipe string |
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| CN106761554A (en) | 2017-05-31 |
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