CN107191156A - A kind of level pressure bleeder - Google Patents
A kind of level pressure bleeder Download PDFInfo
- Publication number
- CN107191156A CN107191156A CN201710492512.8A CN201710492512A CN107191156A CN 107191156 A CN107191156 A CN 107191156A CN 201710492512 A CN201710492512 A CN 201710492512A CN 107191156 A CN107191156 A CN 107191156A
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- passage
- piston
- pressure
- level pressure
- interconnection
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000003780 insertion Methods 0.000 claims abstract description 5
- 230000037431 insertion Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000010779 crude oil Substances 0.000 description 7
- 230000004323 axial length Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 101100008049 Caenorhabditis elegans cut-5 gene Proteins 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000837 restrainer Substances 0.000 description 1
- 239000004575 stone Substances 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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B34/063—Valve or closure with destructible element, e.g. frangible disc
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)
- Chairs Characterized By Structure (AREA)
- Actuator (AREA)
Abstract
The invention provides a kind of level pressure bleeder, including being in the form of a column and longitudinally disposed body, along the axial direction of body, the first passage and second channel being parallel to each other are offered on body, the upper surface and lower surface of first passage and the equal insertion body of second channel, the axis of first passage is overlapped with the axis of body, second channel is located at the side of first passage, in the opposite side of first passage, interconnection is further opened with body, radially extend setting of the interconnection along body, interconnection runs through the side wall of body and connected with first passage；It is provided with pressure release blind pipe with can be removably mounted inside interconnection；Piston is provided with inside first passage.The level pressure bleeder that the present invention is provided, piston be subject to drive its pressure moved downward to reach predetermined value after, position-limit mechanism fails, piston slamming down pressure release blind pipe, it is broken the blind end of pressure release blind pipe, draining is carried out by the open end of pressure release blind pipe, the purpose that drainage pressure is controllable is reached by presetting the intensity of position-limit mechanism.
Description
Technical field
The present invention relates to the oil well light maintenance operation bleeder in petroleum production engineering field, a kind of level pressure draining is referred in particular to
Device.
Background technology
Conventional pressure formula bleeder is mainly the structure using rupture disk, is influenceed larger by pit shaft external and internal pressure, is difficult
Its burst pressure is controlled, causes drainage pressure less easily to control, it is impossible to realizes that scene is controllable, to its in oil well light maintenance operation
It, which is operated, brings certain difficulty, influences job scheduling.Especially bridge-type flow string, because bridge-type flow string is using pipe
The form of middle pipe, the internal flow of tube-in-tube can not outwards flow, and can only be that outside fluid is moved to the inside, during lift pipe string in it
The liquid in portion can not release, and cause lift pipe string load in operation process excessive, simultaneously because the caliber of bridge-type flow string compared with
Small, traditional bleeder easily causes bleeder unlatching during actuating oil-pumping unit, and causes the generation of down-hole accident, because
This does not descend bleeder in lower bridge-type flow string so that bridge-type flow string can not draining, be unfavorable for bridge-type oil recovery
Technique Popularizing application.
The content of the invention
It is an object of the invention to provide a kind of level pressure bleeder, pressure release can be started after pressure reaches predetermined value, reach and let out
The controllable purpose of oil pressure, can be widely used in all kinds of flow strings.
To reach above-mentioned purpose, the invention provides a kind of level pressure bleeder, wherein, the level pressure bleeder includes being in post
Shape and longitudinally disposed body, along the axial direction of the body, offer the first passage being parallel to each other and second on the body
Passage, the first passage and the upper surface of body described in the equal insertion of the second channel and the lower surface of the body, it is described
The axis of first passage is overlapped with the axis of the body, and the second channel is located at the side of the first passage, in described
Interconnection is further opened with the opposite side of first passage, the body, the interconnection is radially extended along the body
Set, the interconnection runs through the side wall of the body, and the interconnection is connected with the first passage；
The inside of the interconnection is provided with pressure release blind pipe with can be removably mounted, and the pressure release blind pipe is in tubular construction, described to let out
Press blind pipe one end be blind end, and the pressure release blind pipe the other end be open end, the outer wall of the pressure release blind pipe with it is described
The inwall of interconnection is combined, and the blind end of the pressure release blind pipe stretches to the inside of the first passage；
The inside of the first passage is provided with piston, and the piston is fitted with the inner wall sealing of the first passage, described
Piston keeps geo-stationary by position-limit mechanism and the body, and the pressure being subject at the top of the piston reaches predetermined value
Under state, position-limit mechanism failure, the piston can the first passage inside slide downward.
Level pressure bleeder as described above, wherein, the first passage is set on the body from top to bottom to run through
Step through-hole, the diameter of the upper end of the first passage is more than the diameter of the lower end of the first passage, the first passage
First terrace is formed with inner surface；
The piston is inserted in the inside of the first passage, and the diameter of the upper end of the piston is more than under the piston
Second step face is formed with the diameter at end, the outer surface of the piston；
The second step face is located at the top of the First terrace, the First terrace, the first passage
Inner surface, the second step face and the outer surface of the piston enclose to form annular space.
Level pressure bleeder as described above, wherein, the position-limit mechanism is cuts ring, and the cutting ring is by the piston
Upper surface upwardly extends to be formed, and the external diameter for cutting ring is more than the external diameter of the piston, the cutting ring and the piston it
Between formed the 3rd step surface, in the state of the piston is inserted in the inside of the first passage, the 3rd step surface is supported
On the upper surface for leaning against the body.
Level pressure bleeder as described above, wherein, the position-limit mechanism is at least one cutting pin, the cutting pin
It is inserted in along one end of being radially arranged for the body, and the cutting pin on the side wall of the body, the cutting pin
The other end be inserted on the piston.
Level pressure bleeder as described above, wherein, the position-limit mechanism includes stage clip and pressure ring, and the compression spring sleeve is located at institute
State on the outer surface of piston, and the stage clip is located in the annular space, the upper end of the stage clip is resisted against described second
On terrace, the lower end of the stage clip is resisted against on the First terrace, and the pressure ring is fixed at the upper of the first passage
Hold on inwall, and the pressure ring is located at the top of the piston, the stage clip is pushed up to the piston, the upper end of the piston
Face is resisted against on the lower surface of the pressure ring.
Level pressure bleeder as described above, wherein, between the inner surface of the outer surface of the piston and the first passage
Provided with multiple sealing rings.
Level pressure bleeder as described above, wherein, upwardly extended above the body and be formed with top connection, it is described on connect
Head is in the tubular structure of inner hollow, and the top connection is connected with the first passage, the second channel.
Level pressure bleeder as described above, wherein, the inwall of the top connection is provided with internal thread.
Level pressure bleeder as described above, wherein, be downwardly extending lower contact below the body, it is described under connect
Head is in the tubular structure of inner hollow, and the lower contact connects with the first passage, the second channel.
Level pressure bleeder as described above, wherein, the outer wall of the lower contact is provided with external screw thread.
Compared with prior art, advantages of the present invention is as follows：
The level pressure bleeder that the present invention is provided, piston be subject to drive its pressure moved downward to reach predetermined value after,
Position-limit mechanism fails, and piston slamming down pressure release blind pipe is broken the blind end of pressure release blind pipe, so that opening by pressure release blind pipe
Put end and carry out draining, the purpose that drainage pressure is controllable is reached by presetting the intensity of position-limit mechanism, make letting out for the present invention
Oily operation is only relevant with its internal stress, without being influenceed by ambient pressure, environment and manual operation, makes operation field more easily-controllable
System, and the present invention is widely used in various flow strings.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
The first structural representation for the level pressure bleeder that Fig. 1 provides for the present invention；
Second of structural representation of the level pressure bleeder that Fig. 2 provides for the present invention；
The third structural representation for the level pressure bleeder that Fig. 3 provides for the present invention.
Drawing reference numeral explanation：
1 body
11 first passages
111 First terraces
12 second channels
13 interconnections
2 pressure release blind pipes
21 blind ends
22 open ends
3 pistons
31 second step faces
32 closure gasket grooves
4 cut ring
41 the 3rd step surfaces
5 cut pin
6 stage clips
7 pressure rings
8 top connections
9 lower contacts
A annular spaces
S sealing rings
Embodiment
In order to have clearer understanding to technical scheme, purpose and effect, in conjunction with the brief description of the drawings present invention
Embodiment.
As shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, level pressure bleeder include be in the form of a column and
Longitudinally disposed body 1, along the axial direction of body 1, offers the first passage 11 and second channel 12 being parallel to each other on body 1,
First passage 11 and the upper surface of the equal insertion body 1 of second channel 12 and the lower surface of body 1, you can be interpreted as, first leads to
Road 11 and the through hole that second channel 12 is that insertion from top to bottom is arranged on body 1；The axis of first passage 11 and body 1
Axis is overlapped, and second channel 12 is located at the side of first passage 11, i.e., be to be arranged concentrically between first passage 11 and body 1, the
One passage 11 is concentric pylone, and is set for the eccentric between second channel 12 and body 1, and second channel 12 is eccentric through-hole, its
Middle second channel 12 is used to supply crude oil flow, and in operation process, crude oil is moved from the bottom to top by second channel；It is logical in first
Interconnection 13, i.e. second channel 12 are further opened with the opposite side in road 11, body 1 corresponding with interconnection 13 logical positioned at first
The relative both sides in road 11, radially extend setting of the interconnection 13 along body 1, interconnection 13 runs through the side wall of body 1, and
Interconnection 13 is connected with first passage 11, i.e., first passage 11 collectively form the threeway of shaped similar as T with interconnection 13
Passage；
The inside of interconnection 13 can be removably mounted be provided with pressure release blind pipe 2, pressure release blind pipe 2 in tubular construction, pressure release blind pipe 2
One end is blind end 21, and the other end of pressure release blind pipe 2 is open end 22, and when mounted, the outer wall of pressure release blind pipe 2 is with laterally leading to
The mode that the inwall in road 13 is connected through a screw thread is combined, and the blind end 21 of pressure release blind pipe 2 is stretched to first passage 11
At the lower end of internal and close first passage 11, the setting of pressure release blind pipe 2 can close interconnection 13, to ensure do not needing
In the state of draining, the crude oil inside body 1 will not be leaked by interconnection 13；
The inside of first passage 11 is provided with piston 3, and piston 3 is fitted with the inner wall sealing of first passage 11, and piston 3 passes through limit
Position mechanism keeps geo-stationary with body 1, and when in use, the top of piston 3 can be reached by a downward pressure in pressure
In the state of predetermined value, position-limit mechanism failure, piston 3 can first passage 11 inside slide downward, i.e., position-limit mechanism for live
Plug 3, which provides one, to be made piston 3 not occur motion but the power of geo-stationary is kept with body 1, when what is be subject on the upper surface of piston 3
Pressure is more than after the power that position limiting structure is provided, that is, puts on the pressure that it moves downward of driving on piston 3 and be more than limit
Position mechanism put on piston 3 when piston 3 and the body 1 is kept the power of geo-stationary, position-limit mechanism failure, position-limit mechanism loses
Effect includes two kinds of situations, and one of which is that the power that position-limit mechanism is put on piston 3 disappears, and another is that position-limit mechanism is put on
Power on piston 3 is overcome counteracting, and the moment of piston 3 has the very big impulsive force moved downward, drives piston 3 to move downward
And the blind end 21 of pressure release blind pipe 2 is impacted, it is broken the blind end 21 of pressure release blind pipe 2, the two ends connection of pressure release blind pipe 2, body 1
Internal crude oil flows out to the outside of body 1 through pressure release blind pipe 2, carries out blowout job.Wherein, it is to pass through to the pressurization of piston 3
The sucker rod (not shown) for being arranged on the top of piston 3 is pushed down on to piston to realize, the lower end of sucker rod is resisted against
On the upper surface of piston 3, the power that piston 3 is moved downward is driven to be piston 3 more than position-limit mechanism when sucker rod is put on piston 3
Offer is kept after the motionless power of piston 3, position-limit mechanism failure, and sucker rod promotes piston 3 to move downward, and hits pressure release blind pipe
2.It should be noted that the external diameter of sucker rod is less than the external diameter of piston 3, in order to sucker rod can be stretched in first passage 11
Persistently piston 3 is promoted to move downward and hit to pressure release blind pipe 2.
Wherein, in the state of concordant with the upper surface holding of body 1 in the upper surface of piston 3, the lower surface of piston 3 is with letting out
There is a certain distance between pressure blind pipe 2, be that enough shock spaces are left when piston 3 is moved downward, make piston 3 blind to pressure release
Pipe 2 is hit rather than promoted, to ensure that smoothly draining is realized in fracture to pressure release blind pipe 2 under the shock action of piston 3.
Also, pressure release blind pipe 2 is made up of fragile material, such as cast iron, stone material, to ensure to hit it in piston 3
It is broken smoothly the blind end 21 of pressure release blind pipe 2 when hitting, so as to start blowout job.
Further, as shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, first passage 11 is
From top to bottom through the step through-hole being located on body 1, the diameter of the upper end of first passage 11 is more than the lower end of first passage 11
Diameter, it is epimere and hypomere two that First terrace 111, i.e. 11 points of first passage are formed with the inner surface of first passage 11
Point, wherein, the internal diameter of epimere is more than the internal diameter of hypomere, and the junction between epimere and hypomere forms annular due to the change of internal diameter
First terrace 111；
Piston 3 is inserted in the inside of first passage 11, and the diameter of the upper end of piston 3 is more than the diameter of the lower end of piston 3, living
Second step face 31, i.e. piston 3, which are formed with, on the outer surface of plug 3 is also classified into epimere and hypomere, wherein, under the external diameter of epimere is more than
The external diameter of section, junction between epimere and hypomere forms the second step face 31 of annular due to the change of external diameter, piston 3 it is upper
The diameter of section is engaged with the internal diameter of the epimere of first passage 11, the external diameter of the hypomere of piston 3 and the hypomere of first passage 11
External diameter is engaged；
When piston 3 is inserted into first passage 11, second step face 31 is located at the top of First terrace 111, first
Step surface 111, the inner surface of first passage 11, second step face 31 and the outer surface of piston 3 enclose to form annular space A.Its
In, the axial length of the epimere of piston 3 is less than the axial length of the epimere of first passage 11, and the axial direction of the hypomere of piston 3 is long
Degree so just can guarantee that and be put down in the upper surface of piston 3 and the upper surface of body 1 more than the axial length of the hypomere of first passage 11
When neat, First terrace 111, the inner surface of first passage 11, second step face 31 and the outer surface of piston 3 can enclose shape
Circularize space A, it is spaced between First terrace 111 and second step face 31, be piston 3 provide move downward
Space, is arranged such and both can guarantee that piston 3 can have enough spaces for moving downward and severing pressure release blind pipe 2, while can also
Piston 3 is maintained to the inside of body 1, prevents the lower end of piston 3 from body 1 from falling to the outside of body 1.Also, by setting
Annular space A is put, is conducive to the inside and outside formation pressure difference in body 1, so as to preferably drive piston 3 to move downward.
Further, as shown in figure 1, the invention provides a kind of level pressure bleeder, wherein, position-limit mechanism to cut ring 4,
Cutting ring 4 is upwardly extended by the upper surface of piston 3 to be formed, and cuts ring 4 in annular shape, wherein, cutting ring 4 can be and piston 3
It is integrally formed, or can also be and be welded on by multiple tiny contiguous blocks on the upper surface of piston 3, cuts the internal diameter of ring 4
Less than the external diameter of piston 3, and the external diameter that the external diameter of ring 4 is more than piston 3 is cut, the outer surface for cutting ring 4 protrudes from the outer of piston 3
Surface, cuts and the 3rd step surface 41 is formed between ring 4 and piston 3, the state of the inside of first passage 11 is inserted in piston 3
Under, the external diameter that piston 3 is more than due to cutting the external diameter of ring 4 is namely more than the internal diameter of first passage 11, cuts ring 4 and cannot be introduced into
Into first passage 11, therefore, the 3rd step surface 41 is resisted against on the upper surface of body 1.When the pressure that piston 3 is subject to gradually increases
Greatly, scheduled pressure value is reached, that is, when cutting the shear strength of ring 4, cuts ring 4 and is cut, separated with piston 3, ring 4 is cut and stays
On the upper surface of body 1, piston 3 moves downward in first passage 11 and severs pressure release blind pipe 2, starts blowout job.
Further, as shown in Fig. 2 the invention provides a kind of level pressure bleeder, wherein, position-limit mechanism is at least one
Pin 5 is cut, being radially arranged along body 1 of pin 5 is cut, that is, cuts axis of the axis perpendicular to body 1 of pin 5, and cut
One end of disconnected pin 5 is inserted on the side wall of body 1, and the other end for cutting pin 5 is inserted on piston 3, so by body 1 with
Piston 3 is fixed, and makes remains stationary therebetween, drives its power moved downward to reach scheduled pressure value when what piston 3 was subject to,
When exactly cutting the shear strength of pin 5, cut pin 5 and cut, the spacing failure between piston 3 and body 1, piston 3 is in pressure
Moved downward in the presence of power and sever pressure release blind pipe 2, start blowout job.To ensure the uniform force of piston 3, pin is cut
5 should be provided with least two, and each is cut circumference of the pin 5 along body 1 and is uniformly distributed.
During for above-mentioned position-limit mechanism to cut ring 4 or cutting pin 5, the mode of position-limit mechanism failure is position restrainer
What structure was provided makes piston 3 keep the power of geo-stationary to disappear with body 1.
Further, as shown in figure 3, the invention provides a kind of level pressure bleeder, wherein, position-limit mechanism includes stage clip 6
With pressure ring 7, stage clip 6 is sheathed on the outer surface of piston 3, and stage clip 6 is located in annular space A, wherein, stage clip 6 is with slightly
The state compressed is arranged in annular space A, the upper end of stage clip 6 is resisted against on second step face 31, the lower end of stage clip 6 is supported
Lean against on First terrace 111, when piston 3 be subject to when driving pressure that it moves downward to be more than the elastic force of stage clip 6, piston 3
Move downward and sever pressure release blind pipe 2, start blowout job；Pressure ring 7 is fixed on the inwall of the upper end of first passage 11, pressure
The upper surface of ring 7 is concordant with the upper surface of body 1, and pressure ring 7 is located at the top of piston 3, state of the stage clip 6 slightly to be compressed
It can be pushed up when being installed on annular space A to piston 3, the upper surface of piston 3 is resisted against on the lower surface of pressure ring 7, by setting
Piston 3 can effectively be maintained at the inside of first passage 11 by pressure ring 7, prevent the upper end of piston 3 from first passage 11 from extending out to
The outside of one passage 11.
When above-mentioned position-limit mechanism is stage clip 6, the mode of position-limit mechanism failure makes work for what position-limit mechanism was provided
Plug 3 keeps the power of geo-stationary to be overcome counteracting with body 1.
Further, as shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, the appearance of piston 3
Multiple sealing ring S are provided between the inner surface of face and first passage 11.On the outer wall of the upper end of piston 3 and under piston 3
It is arranged with respectively on the outer wall at end in closure gasket groove 32, each closure gasket groove 32 and is equipped with sealing ring S, sealing ring S passes through correspondence
Closure gasket groove 32 be positioned on piston 3, and sealing ring S outer surface protrude from piston 3 outer surface and and first passage
11 inner surface contact sealing, so can effectively prevent crude oil from entering in annular space A and being caused to moving downward for piston 3
Hinder.The air pressure in annular space A is also ensured simultaneously, is severed the blind end 21 of pressure release blind pipe 2 in piston 3 and is removed sucker rod
Afterwards, piston can bounce back to initial position upwards automatically under the effect of the gas pressure in annular space A.It should be noted that setting
Should ensure that in the sealing ring S of the lower end of piston 3 position, during piston 3 is slided up and down can all the time with first passage 11
Inner surface contact sealing, to ensure its sealed validity.
Preferably, as shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, the upper direction of body 1
Upper extension is formed with top connection 8, and top connection 8 is in inner hollow and the tubular structure of up/down perforation, top connection 8 and first passage
11st, second channel 12 is connected.Top connection 8 is used to connect tubing string or other downhole tools.
Preferably, as shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, the inwall of top connection 8
Internal thread is provided with, is easy to be connected with tubing string or the progress dismounting of other downhole tools.
Preferably, as shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, the lower direction of body 1
Lower extension is formed with lower contact 9, and lower contact 9 is in inner hollow and the tubular structure of up/down perforation, and lower contact 9 and first passage
11st, second channel 12 is connected.Lower contact 9 is also used for connection tubing string or other downhole tools.
Preferably, as shown in FIG. 1 to 3, the invention provides a kind of level pressure bleeder, wherein, the outer wall of lower contact 9
External screw thread is provided with, is easy to be connected with tubing string or the progress dismounting of other downhole tools.
When in use, top connection 8 of the invention is connected with two tubing strings respectively with lower contact 9, wherein positioned at the lower section of lower contact 9
Tubing string be provided with check valve, crude oil through check valve enter lower contact 9 inside and sequentially flow through second channel 12, top connection
8 enter in the tubing string being located above top connection 8, when crude oil rises in the tubing string above top connection 8 needs pressure release, oil pumping
Bar from top to bottom applies pressure to piston 3, when pressure that piston 3 is subject to reaches predetermined value, position-limit mechanism failure, piston 3 to
The lower blind end 21 for moving and severing pressure release blind pipe 2, starts blowout job.
Compared with prior art, advantages of the present invention is as follows：
The level pressure bleeder that the present invention is provided, piston be subject to drive its pressure moved downward to reach predetermined value after,
Position-limit mechanism fails, and piston slamming down pressure release blind pipe is broken the blind end of pressure release blind pipe, so that opening by pressure release blind pipe
Put end and carry out draining, the purpose that drainage pressure is controllable is reached by presetting the intensity of position-limit mechanism, make letting out for the present invention
Oily operation is only relevant with its internal stress, without being influenceed by ambient pressure, environment and manual operation, makes operation field more easily-controllable
System, and the present invention is widely used in various flow strings.
Schematical embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.It is any
One of ordinary skill in the art, made equivalent variations are with repairing on the premise of the design of the present invention and principle is not departed from
Change, the scope of protection of the invention all should be belonged to.
Claims (10)
1. a kind of level pressure bleeder, it is characterised in that the level pressure bleeder includes being in the form of a column and longitudinally disposed body, along institute
State the first passage and second channel for offering and being parallel to each other on the axial direction of body, the body, the first passage with it is described
The upper surface of body described in the equal insertion of second channel and the lower surface of the body, the axis of the first passage and the body
Axis overlap, the second channel be located at the first passage side, in the opposite side of the first passage, the body
On be further opened with interconnection, radially extend setting of the interconnection along the body, the interconnection is through described
The side wall of body, and the interconnection connects with the first passage；
The inside of the interconnection is provided with pressure release blind pipe with can be removably mounted, and in tubular construction, the pressure release is blind for the pressure release blind pipe
One end of pipe is blind end, and the other end of the pressure release blind pipe is open end, outer wall and the transverse direction of the pressure release blind pipe
The inwall of passage is combined, and the blind end of the pressure release blind pipe stretches to the inside of the first passage；
The inside of the first passage is provided with piston, and the piston is fitted with the inner wall sealing of the first passage, the piston
Geo-stationary is kept by position-limit mechanism and the body, the pressure being subject at the top of the piston reaches the state of predetermined value
Under, position-limit mechanism failure, the piston can the first passage inside slide downward.
2. level pressure bleeder according to claim 1, it is characterised in that the first passage is located at from top to bottom to run through
Step through-hole on the body, the diameter of the upper end of the first passage is more than the diameter of the lower end of the first passage, institute
State and First terrace is formed with the inner surface of first passage；
The piston is inserted in the inside of the first passage, and the diameter of the upper end of the piston is more than the lower end of the piston
Second step face is formed with diameter, the outer surface of the piston；
The second step face is located at the top of the First terrace, the First terrace, the interior table of the first passage
Face, the second step face and the outer surface of the piston enclose to form annular space.
3. level pressure bleeder according to claim 1, it is characterised in that the position-limit mechanism is cutting ring, the cutting
Ring is upwardly extended by the upper surface of the piston and formed, and the external diameter for cutting ring is more than the external diameter of the piston, the cutting
The 3rd step surface, in the state of the piston is inserted in the inside of the first passage, institute are formed between ring and the piston
The 3rd step surface is stated to be resisted against on the upper surface of the body.
4. level pressure bleeder according to claim 1, it is characterised in that the position-limit mechanism is at least one break pin
Nail, cutting pin being radially arranged along the body, and described one end for cutting pin is inserted in the side wall of the body
On, the other end for cutting pin is inserted on the piston.
5. level pressure bleeder according to claim 2, it is characterised in that the position-limit mechanism includes stage clip and pressure ring, institute
Compression spring sleeve is stated on the outer surface of the piston, and the stage clip is located in the annular space, the upper end of the stage clip is supported
Lean against on the second step face, the lower end of the stage clip is resisted against on the First terrace, and the pressure ring is fixed at institute
On the inwall for the upper end for stating first passage, and the pressure ring is located at the top of the piston, and the stage clip is pushed up to the work
Plug, the upper surface of the piston is resisted against on the lower surface of the pressure ring.
6. the level pressure bleeder according to any one of claim 3~5, it is characterised in that the outer surface of the piston and institute
State and multiple sealing rings are provided between the inner surface of first passage.
7. the level pressure bleeder according to any one of claim 3~5, it is characterised in that prolong upwards the top of the body
Stretch and be formed with top connection, the top connection is in the tubular structure of inner hollow, the top connection and the first passage, described the
Two passages are connected.
8. level pressure bleeder according to claim 7, it is characterised in that the inwall of the top connection is provided with internal thread.
9. the level pressure bleeder according to any one of claim 3~5, it is characterised in that the lower section of the body is to downward
Stretch and be formed with lower contact, the lower contact is in the tubular structure of inner hollow, and it is the lower contact and the first passage, described
Second channel is connected.
10. level pressure bleeder according to claim 9, it is characterised in that the outer wall of the lower contact is provided with external screw thread.
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| CN201710492512.8A CN107191156B (en) | 2017-06-26 | 2017-06-26 | A kind of level pressure bleeder |
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| CN201710492512.8A CN107191156B (en) | 2017-06-26 | 2017-06-26 | A kind of level pressure bleeder |
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| CN107191156A true CN107191156A (en) | 2017-09-22 |
| CN107191156B CN107191156B (en) | 2019-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108868693A (en) * | 2018-09-14 | 2018-11-23 | 天津大港油田石油工程研究院钻采技术开发有限公司 | Air compresses bleeder |
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|---|---|
| CN107191156B (en) | 2019-04-12 |
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