CN107191156B - Constant pressure oil drain device - Google Patents
Constant pressure oil drain device Download PDFInfo
- Publication number
- CN107191156B CN107191156B CN201710492512.8A CN201710492512A CN107191156B CN 107191156 B CN107191156 B CN 107191156B CN 201710492512 A CN201710492512 A CN 201710492512A CN 107191156 B CN107191156 B CN 107191156B
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 11
- 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
- 238000000034 method Methods 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process 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
- 230000008859 change Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 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 constant pressure oil drain device, which comprises a columnar body which is longitudinally arranged, wherein a first channel and a second channel which are parallel to each other are arranged on the body along the axial direction of the body, the first channel and the second channel are both communicated with the upper end surface and the lower end surface of the body, the axis of the first channel is superposed with the axis of the body, the second channel is positioned on one side of the first channel, a transverse channel is also arranged on the body on the other side of the first channel, the transverse channel extends along the radial direction of the body, and the transverse channel penetrates through the side wall of the body and is communicated with the first channel; a pressure relief blind pipe is detachably arranged in the transverse channel; a piston is arranged in the first channel. According to the constant-pressure oil drain device provided by the invention, after the pressure applied to the piston to drive the piston to move downwards reaches the preset value, the limiting mechanism fails, the piston impacts the pressure relief blind pipe downwards to break the closed end of the pressure relief blind pipe, oil is drained through the open end of the pressure relief blind pipe, and the purpose of controllable oil drainage pressure is achieved through presetting the strength of the limiting mechanism.
Description
Technical field
The present invention relates to the oil well light maintenance operation bleeders in petroleum production engineering field, refer in particular to a kind of level pressure draining
Device.
Background technique
Conventional pressure formula bleeder is mainly the structure for using rupture disk, is affected, is not easy by pit shaft external and internal pressure
Its burst pressure is controlled, drainage pressure is caused less easily to control, cannot achieve scene controllably, to its in oil well light maintenance operation
It operates and brings certain difficulty, influences job scheduling.Especially bridge-type flow string, since bridge-type production pipe is using pipe
The internal flow of the form of middle pipe, tube-in-tube cannot flow outward, can only be that outside fluid is mobile to the inside, when 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 be easy to cause bleeder to open during actuating oil-pumping unit, and leads to 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.
Summary of the invention
The object of the present invention is to provide a kind of level pressure bleeders, can start pressure release 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.
In order to achieve the above objectives, the present invention provides a kind of level pressure bleeders, wherein the level pressure bleeder includes in column
Shape and longitudinally disposed ontology offer the first passage being parallel to each other and second along the axial direction of the ontology on the ontology
Channel, the first passage and the second channel penetrate through the upper surface of the ontology and the lower end surface of the ontology, described
The axis of first passage is overlapped with the axis of the ontology, and the second channel is located at the side of the first passage, Yu Suoshu
The other side of first passage is also provided with interconnection on the ontology, and the interconnection is radially extended along the ontology
Setting, the interconnection runs through the side wall of the ontology, and the interconnection is connected to the first passage；
The inside of the interconnection is equipped 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 closed end, and the other end of the pressure release blind pipe be open end, the outer wall of the pressure release blind pipe with it is described
The inner wall of interconnection combines, and the closed end of the pressure release blind pipe stretches to the inside of the first passage；
The inside of the first passage is equipped with piston, and the inner wall palette of the piston and the first passage is described
Piston keeps opposing stationary with the ontology by position-limit mechanism, and the pressure being subject at the top of the piston reaches predetermined value
Under state, the position-limit mechanism failure, the piston can be in the inside slide downward of the first passage.
Level pressure bleeder as described above, wherein the first passage is from top to bottom to run through to set on the body
Step through-hole, the diameter of the upper end of the first passage are greater than the diameter of the lower end of the first passage, the first passage
First terrace is formed on inner surface；
The piston is inserted in the inside of the first passage, and the diameter of the upper end of the piston is greater than under the piston
The diameter at end is formed with second step face on 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
The outer surface of inner surface, the second step face and the piston is enclosed annular space.
Level pressure bleeder as described above, wherein the position-limit mechanism is to cut ring, and the cutting ring is by the piston
Upper surface upwardly extends to be formed, and the outer diameter for cutting ring is greater than the outer diameter of the piston, the cuttings ring and the piston it
Between formed third step surface, in the state that the piston is inserted in the inside of the first passage, the third step surface is supported
On the upper surface for leaning against the ontology.
Level pressure bleeder as described above, wherein the position-limit mechanism is that at least one cuts pin, the cutting pin
Along being arranged radially for the ontology, and described one end for cutting pin is inserted on the side wall of the ontology, the cutting pin
The other end be inserted on the piston.
Level pressure bleeder as described above, wherein the position-limit mechanism includes pressure spring and pressure ring, and the compression spring sleeve is set to institute
It states on the outer surface of piston, and the pressure spring is located in the annular space, the upper end of the pressure spring is resisted against described second
On terrace, the lower end of the pressure spring is resisted against on the First terrace, and the pressure ring is fixed at the upper of the first passage
It holds on inner wall, and the pressure ring is located at the top of the piston, the pressure spring is pushed up to the piston, the upper end of the piston
Face is resisted against on the lower end surface of the pressure ring.
Level pressure bleeder as described above, wherein between the outer surface of the piston and the inner surface of the first passage
Equipped with multiple sealing rings.
Level pressure bleeder as described above, wherein upwardly extended above the ontology 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 to the first passage, the second channel.
Level pressure bleeder as described above, wherein the inner wall of the top connection is equipped with internal screw thread.
Level pressure bleeder as described above, wherein be downwardly extending lower contact below the ontology, connect under described
Head is in the tubular structure of inner hollow, and the lower contact is connected to the first passage, the second channel.
Level pressure bleeder as described above, wherein the outer wall of the lower contact is equipped with external screw thread.
Compared with prior art, advantages of the present invention is as follows:
Level pressure bleeder provided by the invention, after the pressure for driving it to move downward that piston is subject to reaches predetermined value,
Position-limit mechanism failure, piston slamming down pressure release blind pipe are broken the closed end of pressure release blind pipe, thus opening by pressure release blind pipe
It puts end and carries out draining, achieve the purpose that drainage pressure is controllable by presetting the intensity of position-limit mechanism, make of the invention let out
Oily operation is only related with its internal stress, without being influenced by ambient pressure, environment and manual operation, keeps operation field more easily-controllable
System, and the present invention is widely used in various flow strings.
Detailed description of the invention
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein:
Fig. 1 is the first structural schematic diagram of level pressure bleeder provided by the invention；
Fig. 2 is second of structural schematic diagram of level pressure bleeder provided by the invention；
Fig. 3 is the third structural schematic diagram of level pressure bleeder provided by the invention.
Drawing reference numeral explanation:
1 ontology
11 first passages
111 First terraces
12 second channels
13 interconnections
2 pressure release blind pipes
21 closed ends
22 open ends
3 pistons
31 second step faces
32 closure gasket grooves
4 cut ring
41 third step surfaces
5 cut pin
6 pressure springs
7 pressure rings
8 top connections
9 lower contacts
A annular space
S sealing ring
Specific embodiment
In order to have clearer understanding to technical solution of the present invention, purpose and effect, now in conjunction with the Detailed description of the invention present invention
Specific embodiment.
As shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein level pressure bleeder include be in the form of a column and
Longitudinally disposed ontology 1 offers the first passage 11 and second channel 12 being parallel to each other along the axial direction of ontology 1 on ontology 1,
First passage 11 and second channel 12 penetrate through the upper surface of ontology 1 and the lower end surface of ontology 1, it can are interpreted as, first is logical
Road 11 and second channel 12 are the through-hole that from top to bottom perforation is arranged on ontology 1；The axis of first passage 11 and ontology 1
Axis is overlapped, and it is to be arranged concentrically that is, between first passage 11 and ontology 1 that second channel 12, which is located at the side of first passage 11, the
One channel 11 is concentric pylone, and is set for the eccentric between second channel 12 and ontology 1, and second channel 12 is eccentric through-hole,
Middle second channel 12 is used for for crude oil flow, and in operation process, crude oil is moved from the bottom to top by second channel；It is logical in first
The other side in road 11, is also provided with interconnection 13 on ontology 1, i.e., corresponding with interconnection 13 to be located at first logical for second channel 12
The opposite two sides in road 11, interconnection 13 along ontology 1 the setting that radially extends, interconnection 13 run through ontology 1 side wall, and
Interconnection 13 is connected to first passage 11, i.e. first passage 11 and interconnection 13 threeway that collectively forms shaped similar as T
Channel；
The inside of interconnection 13 can be removably mounted be equipped with pressure release blind pipe 2, pressure release blind pipe 2 in tubular construction, pressure release blind pipe 2
One end is closed end 21, and the other end of pressure release blind pipe 2 is open end 22, and during installation, the outer wall of pressure release blind pipe 2 leads to lateral
The mode that the inner wall in road 13 is connected through a screw thread combines, and the closed end 21 of pressure release blind pipe 2 is made to stretch to first passage 11
At internal and lower end close to first passage 11, the setting of pressure release blind pipe 2 can close interconnection 13, to guarantee do not needing
In the state of draining, the crude oil inside ontology 1 will not be leaked by interconnection 13；
The inside of first passage 11 is equipped with piston 3, the inner wall palette of piston 3 and first passage 11, and piston 3 passes through limit
Position mechanism keeps opposing stationary with ontology 1, and when in use, the top of piston 3 will receive a downward pressure, reach in pressure
In the state of predetermined value, position-limit mechanism failure, piston 3 can be in the inside slide downward of first passage 11, i.e. position-limit mechanism is to live
Plug 3, which provides one, to be made piston 3 that movement not occur but keeps opposing stationary power with ontology 1, when what is be subject on 3 upper surface of piston
Pressure is greater than after the power that position limiting structure provides, that is, the pressure for driving it to move downward being applied on piston 3 is greater than limit
Position mechanism be applied on piston 3 make piston 3 and when ontology 1 keeps opposing stationary power, position-limit mechanism failure, position-limit mechanism is lost
Effect includes two kinds of situations, and one of which is that the power that position-limit mechanism is applied on piston 3 disappears, and another kind is that position-limit mechanism is applied to
Power on piston 3 is overcome counteracting, and 3 moment of piston has the very big impact force moved downward, piston 3 is driven to move downward
And the closed end 21 of pressure release blind pipe 2 is impacted, and it is broken the closed end 21 of pressure release blind pipe 2, the both ends connection of pressure release blind pipe 2, ontology 1
Internal crude oil passes through the outside that pressure release blind pipe 2 flows out to ontology 1, carries out blowout job.It wherein, is to pass through to the pressurization of piston 3
Sucker rod (not shown) that the top of piston 3 is arranged in, which is pushed down on to piston, to be realized, the lower end of sucker rod is resisted against
It is piston 3 when sucker rod is applied to the power that piston 3 is driven to move downward on piston 3 to be greater than position-limit mechanism on the upper surface of piston 3
After the power for keeping piston 3 motionless of offer, position-limit mechanism failure, sucker rod pushes piston 3 to move downward, and hits pressure release blind pipe
2.It should be noted that the outer diameter of sucker rod is less than the outer diameter of piston 3, in order to sucker rod can stretch in first passage 11
Persistently piston 3 is pushed to move downward and hit to pressure release blind pipe 2.
Wherein, in the state that the upper surface of piston 3 is concordant with the holding of the upper surface of ontology 1, the lower end surface of piston 3 with let out
Pressing has a certain distance between blind pipe 2, there are enough shock spaces when moving downward for piston 3, keep piston 3 blind to pressure release
Pipe 2 is hit rather than is pushed, to guarantee that smoothly draining is realized in fracture to pressure release blind pipe 2 under the shock movement of piston 3.
Also, pressure release blind pipe 2 is made of fragile material, such as cast iron, stone material etc., to guarantee to hit it in piston 3
The closed end 21 of pressure release blind pipe 2 can be smoothly set to be broken when hitting, to start blowout job.
Further, as shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein first passage 11 is
From top to bottom through the step through-hole being located on ontology 1, the diameter of the upper end of first passage 11 is greater than the lower end of first passage 11
Diameter, be formed with First terrace 111 on the inner surface of first passage 11, i.e. first passage 11 is divided to for upper section and lower section two
Point, wherein the internal diameter of upper section is greater than the internal diameter of lower section, and the junction between upper section and lower section forms annular due to the variation 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 greater than the diameter of the lower end of piston 3, living
It is formed with second step face 31 on the outer surface of plug 3, i.e. piston 3 is also classified into upper section and lower section, wherein under the outer diameter of upper section is greater than
The outer diameter of section, junction between upper section and lower section form the second step face 31 of annular due to the variation of outer diameter, piston 3 it is upper
The diameter of section is matched with the internal diameter of the upper section of first passage 11, the lower section of the outer diameter and first passage 11 of the lower section of piston 3
Outer diameter matches；
When piston 3 is inserted into first passage 11, second step face 31 is located at the top of First terrace 111, and first
Step surface 111, the inner surface of first passage 11, second step face 31 and the outer surface of piston 3 are enclosed annular space A.Its
In, the axial length of the upper section of piston 3 is less than the axial length of the upper section of first passage 11, and the axial direction of the lower section of piston 3 is long
Degree is greater than the axial length of the lower section of first passage 11, so just can guarantee flat in the upper surface of piston 3 and the upper surface of ontology 1
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, being spaced apart from each other between First terrace 111 and second step face 31 provides for piston 3 and to move downward
Space, such setting both can guarantee that piston 3 can have enough spaces moved downward and sever pressure release blind pipe 2, while can also
Piston 3 is maintained to the inside of ontology 1, prevents piston 3 from falling to the outside of ontology 1 from the lower end of ontology 1.Also, by setting
Annular space A is set, is conducive to the inside and outside formation pressure difference in ontology 1, so that piston 3 preferably be driven to move downward.
Further, as shown in Figure 1, the present invention provides a kind of level pressure bleeders, wherein position-limit mechanism is to cut ring 4,
Cutting ring 4 is upwardly extended by the upper surface of piston 3 to be formed, and it is annular in shape to cut ring 4, wherein cutting ring 4 can be and piston 3
It is integrally formed, or can also be and be welded on the upper surface of piston 3 by multiple tiny link blocks, cut the internal diameter of ring 4
Less than the outer diameter of piston 3, and the outer diameter for cutting ring 4 is greater than the outer diameter of piston 3, and the outer surface for cutting ring 4 protrudes from the outer of piston 3
Surface cuts and forms third step surface 41 between ring 4 and piston 3, is inserted in the state of the inside of first passage 11 in piston 3
Under, the outer diameter that the outer diameter due to cutting ring 4 is greater than piston 3 is namely greater than the internal diameter of first passage 11, and cutting ring 4 cannot be introduced into
Into first passage 11, therefore, third step surface 41 is resisted against on the upper surface of ontology 1.When the pressure that piston 3 is subject to gradually increases
Greatly, it when reaching scheduled pressure value, that is, cutting the shear strength of ring 4, cuts ring 4 and is cut, separated with piston 3, cut ring 4 and stay
On the upper surface of ontology 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 present invention provides a kind of level pressure bleeders, wherein position-limit mechanism is at least one
Pin 5 is cut, being arranged radially along ontology 1 of pin 5 is cut, that is, cuts axis of the axis perpendicular to ontology 1 of pin 5, and cut
One end of disconnected pin 5 is inserted on the side wall of ontology 1, and the other end for cutting pin 5 is inserted on piston 3, so by ontology 1 with
Piston 3 is fixed, makes to remain stationary therebetween, when the power for driving it to move downward that piston 3 is subject to reaches scheduled pressure value,
It when exactly cutting the shear strength of pin 5, cuts pin 5 and is cut, the limit failure between piston 3 and ontology 1, piston 3 is being pressed
Pressure release blind pipe 2 is moved downward and severed under the action of power, starts blowout job.For the uniform force for guaranteeing piston 3, pin is cut
5 should be provided at least two, and each cutting pin 5 is uniformly distributed along the circumferential direction of ontology 1.
It is the case where cutting ring 4 or cut pin 5 for above-mentioned position-limit mechanism, the mode of position-limit mechanism failure is position restrainer
What structure provided makes piston 3 and ontology 1 that opposing stationary power be kept to disappear.
Further, as shown in figure 3, the present invention provides a kind of level pressure bleeders, wherein position-limit mechanism includes pressure spring 6
With pressure ring 7, pressure spring 6 is sheathed on the outer surface of piston 3, and pressure spring 6 is located in annular space A, wherein pressure spring 6 is with slightly
Compressed state is mounted in annular space A, is resisted against the upper end of pressure spring 6 on second step face 31, and the lower end of pressure spring 6 is supported
It leans against on First terrace 111, when the pressure for driving it to move downward that piston 3 is subject to is greater than the elastic force of pressure spring 6, piston 3
Pressure release blind pipe 2 is moved downward and severed, blowout job is started；Pressure ring 7 is fixed on the inner wall of the upper end of first passage 11, pressure
The upper surface of ring 7 is concordant with the upper surface of ontology 1, and pressure ring 7 is located at the top of piston 3, and pressure spring 6 is with slightly compressed state
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 end surface of pressure ring 7, passes through setting
Piston 3 can be effectively maintained at the inside of first passage 11 by pressure ring 7, prevent piston 3 from extending out to from the upper end of first passage 11
The outside in one channel 11.
The mode of the case where being pressure spring 6 for above-mentioned position-limit mechanism, position-limit mechanism failure make to live for what position-limit mechanism provided
The power that plug 3 and ontology 1 keep opposing stationary is overcome counteracting.
Further, as shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein the appearance of piston 3
Multiple sealing ring S are equipped between face and the inner surface of first passage 11.On the outer wall of the upper end of piston 3 and under piston 3
Closure gasket groove 32 is recessed on the outer wall at end respectively, sealing ring S is equipped in each closure gasket groove 32, sealing ring S passes through correspondence
Closure gasket groove 32 be located on piston 3, and the outer surface of sealing ring S protrude from piston 3 outer surface and and first passage
11 inner surface contacts sealing, so can effectively prevent crude oil and enters in annular space A and cause to moving downward for piston 3
It hinders.The air pressure in annular space A is also ensured simultaneously, is severed the closed end 21 of pressure release blind pipe 2 in piston 3 and is removed sucker rod
Afterwards, piston can bounce back to upwards initial position under the effect of the gas pressure in annular space A automatically.It should be noted that setting
Should ensure that in the position of the sealing ring S of 3 lower end of piston, during piston 3 slides up and down can always with first passage 11
Inner surface contact sealing, to guarantee the validity of its sealing.
Preferably, as shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein the upper direction of ontology 1
On extended to form top connection 8, the tubular structure of top connection 8 in inner hollow and up and down, top connection 8 and first passage
11, second channel 12 is connected to.Top connection 8 is for connecting tubing string or other downhole tools.
Preferably, as shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein the inner wall of top connection 8
It is equipped with internal screw thread, convenient for carrying out dismounting connection with tubing string or other downhole tools.
Preferably, as shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein the lower direction of ontology 1
Lower extension is formed with lower contact 9, the tubular structure of lower contact 9 in inner hollow and up and down, and lower contact 9 and first passage
11, second channel 12 is connected to.Lower contact 9 is also used for connection tubing string or other downhole tools.
Preferably, as shown in FIG. 1 to 3, the present invention provides a kind of level pressure bleeders, wherein the outer wall of lower contact 9
It is equipped with external screw thread, convenient for carrying out dismounting connection with tubing string or other downhole tools.
When in use, top connection 8 of the invention is connect with two tubing strings respectively with lower contact 9, wherein being located at 9 lower section of lower contact
Tubing string be equipped with check valve, crude oil pass through check valve enter the inside of lower contact 9 and sequentially flow through second channel 12, top connection
8 enter in the tubing string for being located at 8 top of top connection, 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
Lower movement and the closed end 21 for severing pressure release blind pipe 2, start blowout job.
Compared with prior art, advantages of the present invention is as follows:
Level pressure bleeder provided by the invention, after the pressure for driving it to move downward that piston is subject to reaches predetermined value,
Position-limit mechanism failure, piston slamming down pressure release blind pipe are broken the closed end of pressure release blind pipe, thus opening by pressure release blind pipe
It puts end and carries out draining, achieve the purpose that drainage pressure is controllable by presetting the intensity of position-limit mechanism, make of the invention let out
Oily operation is only related with its internal stress, without being influenced by ambient pressure, environment and manual operation, keeps operation field more easily-controllable
System, and the present invention is widely used in various flow strings.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, under the premise of not departing from design and the principle of the present invention made equivalent variations with repair
Change, should belong to the scope of protection of the invention.
Claims (9)
1. a kind of level pressure bleeder, which is characterized in that the level pressure bleeder includes being in the form of a column and longitudinally disposed ontology, along institute
State the axial direction of ontology, offer the first passage and second channel being parallel to each other on the ontology, the first passage with it is described
Second channel penetrates through the upper surface of the ontology and the lower end surface of the ontology, the axis of the first passage and the ontology
Axis be overlapped, the second channel is located at the side of the first passage, the other side of Yu Suoshu first passage, the ontology
On be also provided with interconnection, the interconnection is along the setting that radially extends of the ontology, and the interconnection is through described
The side wall of ontology, and the interconnection is connected to the first passage；
The inside of the interconnection is equipped 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 closed end, and the other end of the pressure release blind pipe is open end, the outer wall of the pressure release blind pipe and the transverse direction
The inner wall in channel combines, and the closed end of the pressure release blind pipe stretches to the inside of the first passage；
The inside of the first passage is equipped with piston, the inner wall palette of the piston and the first passage, the piston
Keep opposing stationary with the ontology by position-limit mechanism, the pressure being subject at the top of the piston reaches the state of predetermined value
Under, the position-limit mechanism failure, the piston can be in the inside slide downward of the first passage；
The first passage be from top to bottom through setting step through-hole on the body, the upper end of the first passage it is straight
Diameter is greater than the diameter of the lower end of the first passage, is formed with First terrace on the inner surface of the first passage；
The piston is inserted in the inside of the first passage, and the diameter of the upper end of the piston is greater than the lower end of the piston
Diameter is formed with second step face on the outer surface of the piston；
The second step face is located at the top of the First terrace, the interior table of the First terrace, the first passage
The outer surface in face, the second step face and the piston is enclosed annular space.
2. level pressure bleeder according to claim 1, which is characterized in that the position-limit mechanism is to cut ring, the cutting
Ring is upwardly extended by the upper surface of the piston and is formed, and the outer diameter for cutting ring is greater than the outer diameter of the piston, the cutting
Third step surface, in the state that the piston is inserted in the inside of the first passage, institute are formed between ring and the piston
Third step surface is stated to be resisted against on the upper surface of the ontology.
3. level pressure bleeder according to claim 1, which is characterized in that the position-limit mechanism is at least one break pin
Nail, cutting pin being arranged radially along the ontology, and described one end for cutting pin is inserted in the side wall of the ontology
On, the other end for cutting pin is inserted on the piston.
4. level pressure bleeder according to claim 1, which is characterized in that the position-limit mechanism includes pressure spring and pressure ring, institute
Compression spring sleeve is stated on the outer surface of the piston, and the pressure spring is located in the annular space, the upper end of the pressure spring is supported
It leans against on the second step face, the lower end of the pressure spring is resisted against on the First terrace, and the pressure ring is fixed at institute
On the inner wall for stating the upper end of first passage, and the pressure ring is located at the top of the piston, and the pressure spring is pushed up to the work
Plug, the upper surface of the piston is resisted against on the lower end surface of the pressure ring.
5. according to the described in any item level pressure bleeders of claim 2~4, which is characterized in that the outer surface of the piston and institute
It states and is equipped with multiple sealing rings between the inner surface of first passage.
6. according to the described in any item level pressure bleeders of claim 2~4, which is characterized in that prolong upwards the top of the ontology
It stretches and is formed with top connection, the top connection is in the tubular structure of inner hollow, the top connection and the first passage, described the
The connection of two channels.
7. level pressure bleeder according to claim 6, which is characterized in that the inner wall of the top connection is equipped with internal screw thread.
8. according to the described in any item level pressure bleeders of claim 2~4, which is characterized in that the lower section of the ontology is to downward
It stretches and is formed with lower contact, the lower contact is in the tubular structure of inner hollow, and the lower contact and the first passage, described
Second channel connection.
9. level pressure bleeder according to claim 8, which is characterized in that the outer wall of the lower contact is equipped with external screw thread.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710492512.8A CN107191156B (en) | 2017-06-26 | 2017-06-26 | Constant pressure oil drain device |
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| CN201710492512.8A CN107191156B (en) | 2017-06-26 | 2017-06-26 | Constant pressure oil drain device |
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| CN107191156A CN107191156A (en) | 2017-09-22 |
| CN107191156B true CN107191156B (en) | 2019-04-12 |
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| CN201710492512.8A Active CN107191156B (en) | 2017-06-26 | 2017-06-26 | Constant pressure oil drain device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108868693B (en) * | 2018-09-14 | 2024-05-07 | 天津大港油田石油工程研究院钻采技术开发有限公司 | Air compression oil drain device |
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|---|---|---|---|---|
| US4286662A (en) * | 1979-11-05 | 1981-09-01 | Page John S Jr | Tubing drain |
| CN2517870Y (en) * | 2001-11-17 | 2002-10-23 | 许俊峰 | Large passage pin oil drain appts. |
| CN201531248U (en) * | 2009-10-23 | 2010-07-21 | 胜利油田智成石油技术开发有限公司 | Differential-pressure type oil drain device |
| CN201908621U (en) * | 2011-01-06 | 2011-07-27 | 杨志海 | Quick oil drainer |
| CN202338280U (en) * | 2011-09-13 | 2012-07-18 | 濮阳市皇锦钻采配件加工有限公司 | Central pipe type integral oil discharger |
| CN204457613U (en) * | 2015-01-21 | 2015-07-08 | 宁夏恒辉油气技术服务有限公司 | A kind of hydraulic oil drain device |
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2017
- 2017-06-26 CN CN201710492512.8A patent/CN107191156B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4286662A (en) * | 1979-11-05 | 1981-09-01 | Page John S Jr | Tubing drain |
| CN2517870Y (en) * | 2001-11-17 | 2002-10-23 | 许俊峰 | Large passage pin oil drain appts. |
| CN201531248U (en) * | 2009-10-23 | 2010-07-21 | 胜利油田智成石油技术开发有限公司 | Differential-pressure type oil drain device |
| CN201908621U (en) * | 2011-01-06 | 2011-07-27 | 杨志海 | Quick oil drainer |
| CN202338280U (en) * | 2011-09-13 | 2012-07-18 | 濮阳市皇锦钻采配件加工有限公司 | Central pipe type integral oil discharger |
| CN204457613U (en) * | 2015-01-21 | 2015-07-08 | 宁夏恒辉油气技术服务有限公司 | A kind of hydraulic oil drain device |
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| CN107191156A (en) | 2017-09-22 |
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