CN110410040A - A kind of safety work system based on the adjustable annular suction row's of helping well head combustible gas - Google Patents
A kind of safety work system based on the adjustable annular suction row's of helping well head combustible gas Download PDFInfo
- Publication number
- CN110410040A CN110410040A CN201910840086.1A CN201910840086A CN110410040A CN 110410040 A CN110410040 A CN 110410040A CN 201910840086 A CN201910840086 A CN 201910840086A CN 110410040 A CN110410040 A CN 110410040A
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- China
- Prior art keywords
- gas
- injection
- adjustable annular
- annular suction
- well head
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0021—Safety devices, e.g. for preventing small objects from falling into the borehole
Abstract
The present invention provides a kind of safety work systems based on the adjustable annular suction row's of helping well head combustible gas, the system comprises sediment outflow pipeline, adjustable annular suction Zhu Pai mechanism, igniter, air injection unit and the first injection-gas manifold, well head is connect by adjustable annular suction Zhu Pai mechanism with sediment outflow pipeline；Air injection unit generates inert gas；The inert gas that air injection unit generates is provided to adjustable annular suction Zhu Pai mechanism to form negative-pressure ward effect by the first injection-gas manifold；Igniter is arranged in sediment outflow pipeline outlet end and can light the fuel gas being discharged from sediment outflow pipeline.The present invention can be realized binary channels suction, the regulatable nitrogen injection suction method of gas injection, eliminate the security risk that natural gas when carrying out spacious well operations such as " make a trip, replace glue core " under the conditions of stratum goes out a small amount of natural gas overflows well head, it is obviously improved field work safe, it is played conducive to gas drilling speed-raising advantage, is suitable for counterflush drilling field.
Description
Technical field
The present invention relates to drilling well (probing) engineering technology equipment fields, it relates in particular to which a kind of use inert gas (example
Such as, nitrogen) suction well head fuel gas safety work system, can be used for oil and gas well drilling technical field, be also applied for
Counterflush drilling field.
Background technique
In general, air drilling has speed-raising, controls leakage and protect the advantages such as reservoir, in recent years in Chongqing of Sichuan, Xinjiang, Qinghai
Equal oil gas block is widely applied, and year-on-year conventional drilling raises speed 3 times or more.The gas bearing interval of hardly possible boring property difference is bored using gas
More universal, (≤10000m when drilling strata goes out a small amount of natural gas of well speed-raising3/ d), circulatory mediator is converted to inert gas
Nitrogen occurs to avoid down-hole blasting accident, but usually because lacking annular preventer, drilling tool size can not be controlled greatly by rotation
The reasons such as head assembly processed, when making a trip, replacing the spacious well operations such as glue core, there are natural gases may overflow well head, bring compared with
Big security risk.
When carrying out spacious well operations such as " make a trip, replace glue core " under the conditions of there is no solution stratum to go out a small amount of natural gas at this stage
Natural gas overflows the effective measures of this problem of well head, current mainly to dispel and overflow by opening the explosion-proof exhaust fan of rig floor or more
Natural gas out prevents its aggregation.There are many deficiencies for this processing method: 1. belonging to passive control measure, cannot fundamentally hinder
Only natural gas overflows well head, and is only capable of dispelling the natural gas that may be overflowed by exhaust fan；2. although explosion-proof exhaust fan can be blown
Dissipate natural gas avoids assembling, but rig floor, well head operator still need to directly facing may overflow natural gas, exist compared with
Big security risk especially carries out percussion operation；3. because being unable to ensure field work safe, when drilling strata goes out a small amount of natural gas
(≤10000m3/ d), usually it is forced to terminate gas drilling operation in advance, is unfavorable for the performance of speed-raising advantage.
Summary of the invention
It is an object of the invention to solve at least one in deficiencies of the prior art.
For example, it is an object of the present invention to provide one kind to be formed to oil and gas well drilling or probing well head
Fuel gas carry out safe handling device.Another object of the present invention is to solve stratum to go out gas under the conditions of a small amount of natural gas
Body drilling well opens safety difficulties when well operations, opens well operations safety to improve gas bearing interval gas drilling, extends gas drilling
Drilling depth plays to be conducive to gas drilling speed-raising advantage, even fills up gas drilling when stratum goes out a small amount of natural gas and open well work
The blank of industry safe technology measure.
To achieve the goals above, the present invention provides a kind of peaces based on the adjustable annular suction row's of helping well head combustible gas
Full operating system, the safety work system include sand discharge pipeline, first it is adjustable annular suction Zhu Pai mechanism, igniter,
Air injection unit and the first injection-gas manifold, wherein it is described suction Zhu Pai mechanism include coaxial arrangement basic flange, gas injection shell,
Core public affairs pipe and upper core pipe, wherein basic flange has the left side that can be connect with well head, the right side with outer conical surface
Portion, and the outer protruding portion radially protruded；Gas injection shell includes left side with the first internal diameter, has the second internal diameter
Right side and one or more gas injection joint, wherein first internal diameter is greater than second internal diameter, the gas injection
The left side of shell is fastenedly connected by anti-rotation component and the outer protruding portion of the basic flange, the right side of the gas injection shell
The inner periphery in portion is provided with the first screw thread, and the gas injection joint is connected to space corresponding to first internal diameter；Core public affairs pipe
Including the right side being inserted into the left side of upper core pipe and being in close contact by the inner peripheral wall of first seal and upper core pipe, have
The left side of second screw thread, and be formed in core public affairs pipe the left side inner periphery on internal conical surface, wherein described
Two screw threads are arranged on the outer wall of core public affairs pipe and can be threadedly engaged with described first, to correspond to turning around axis for core public affairs pipe
Dynamic to realize core public affairs pipe being moved to the left or right relative to gas injection shell, the internal conical surface can be with the basic flange
The outer conical surface of right side cooperates to form the adjustable injection channel being connected to the gas injection joint, to correspond to
The described of core public affairs pipe is moved to the left or right closing or opening for corresponding realization injection channel；Upper core pipe has can be with sediment outflow
The right side of pipeline connection；The air injection unit generates inert gas；First injection-gas manifold generates air injection unit and the
The gas injection joint connection of one adjustable annular suction Zhu Pai mechanism, it is negative to be formed in the first adjustable annular suction Zhu Pai mechanism
Press swabbing action；The fuel gas point that the igniter is arranged in sediment outflow pipeline outlet end and can will be discharged from sediment outflow pipeline
Combustion.
In an exemplary embodiment of the present invention, the safety work system may also include the second adjustable annular and take out
The turning of sediment outflow pipeline is arranged in Xi Zhupai mechanism and the second injection-gas manifold, the second adjustable annular suction Zhu Pai mechanism
Place；Second injection-gas manifold by the inert gas that air injection unit generates be provided to second it is adjustable annular suction Zhu Pai mechanism with
Negative-pressure ward effect is formed in the second adjustable annular suction Zhu Pai mechanism.
In an exemplary embodiment of the present invention, the safety work system may also include third injection-gas manifold and increasing
Press, the inlet end of the supercharger are connect by valve with air injection unit, and the third injection-gas manifold is by the outlet of supercharger
End is connected to well head, and third injection-gas manifold is resistant to scheduled high pressure.In addition, the safety work system may also include low pressure
Gate valve group, the low-pressure gate valve group are arranged between air injection unit and the first, second, and third injection-gas manifold.In addition, the peace
Full operating system may also include the flowmeter being arranged in third injection-gas manifold, standpipe flap type and/or pressure release prizing body.
In an exemplary embodiment of the present invention, the air injection unit may include one or two or more sets of nitrogen list processed
Member.In addition, the nitrogen unit processed can by one or two or more film nitrogen and one or two or more air operated mechanism at.
In an exemplary embodiment of the present invention, may also include can be outside for the core public affairs pipe in safety work system
Core public affairs pipe is set to realize the revolution auxiliary section of the pivoting under power effect.For example, revolution auxiliary section may be provided at core public affairs
On the outer wall between the left side of the upper core pipe and the right side of gas injection shell of pipe.
In an exemplary embodiment of the present invention, the suction Zhu Pai mechanism may also include core pipe shackle member, institute
Stating core pipe shackle member the right side of core public affairs pipe and upper core pipe clamping and can will limit between upper core pipe and core public affairs pipe
Axial displacement.
In an exemplary embodiment of the present invention, the core public affairs pipe, which may also include, is arranged in described in core public affairs pipe
The evagination circumferential part radially protruded on left side and on the left of second screw thread, to improve first screw thread
The leakproofness being threadedly engaged with described second.It is arranged in described in gas injection shell in addition, the suction Zhu Pai mechanism may also include
Second seal between right side and the evagination circumferential part of core public affairs pipe.In addition, the first seal may include phase
The sealing ring and seal groove mutually cooperated, the second seal may include mutually matched sealing ring and seal groove.
In an exemplary embodiment of the present invention, the left side of the gas injection shell can pass through dismountable anti-rotation
The outer protruding portion of component and the basic flange is fastenedly connected.
Compared with prior art, beneficial effects of the present invention include one or more in the following contents:
(1) adjustable annular suction Zhu Pai mechanism is added in the specific position of sediment outflow pipeline, by infusing into sediment outflow pipeline
Enter a certain amount of nitrogen, flow at high speed of the nitrogen in sediment outflow pipeline generates certain suction force in pithead position, by pit shaft natural gas
Suction is directed in sediment outflow pipeline, it is avoided to overflow well head；
(2) two added adjustable annular suction Zhu Pai mechanism, is separately mounted to well mouth rotary control head side outlet
Sediment outflow pipeline " Z " font lands threeway position in position and well site；
(3) Optimal improvements air injection unit structure and connection type introduce low-pressure gate valve group, by the manipulation to its gate valve,
It realizes and injects nitrogen amount at the switching of nitrogen injection way under different working conditions, and different adjustable annular suction Zhu Pai mechanisms
Independent regulation；
(4) automatic ignition device is set in sediment outflow pipeline exit, the natural gas fired of sediment outflow pipeline outlet will be pumped to
Burning emptying；
(5) this method provides carry out the spacious well such as " make a trip, replace glue core " under the conditions of stratum goes out a small amount of natural gas to make
Safety working method when industry eliminates pit shaft natural gas and overflows the security risk that well head may cause, improves gas bearing interval gas
Drillng operation safety, more conducively gas drilling speed-raising advantage play.
Detailed description of the invention
Fig. 1 a shows the one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The schematic diagram of the section structure of adjustable annular suction Zhu Pai mechanism in a exemplary embodiment；
Fig. 1 b shows the partial enlargement diagram of the I in Fig. 1；
Fig. 2 shows one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The adjustable annular suction row's of helping mechanical appearance schematic diagram in exemplary embodiment；
Fig. 3 a shows the one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The schematic diagram of the section structure that adjustable annular suction Zhu Pai mechanism in a exemplary embodiment is in close state；
Fig. 3 b shows the partial enlargement diagram of the N in Fig. 1；
Fig. 4 shows one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The appearance figure of adjustable annular suction Zhu Pai mechanism in exemplary embodiment；
Fig. 5 shows one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The structural schematic diagram of exemplary embodiment.
Description of symbols:
The basis A ' 1- flange, A ' 2- gas injection joint, core pipe on A ' 3-, core pipe flange on A ' 4-, core pipe snap ring, A ' on A ' 5-
Core pipe snap ring tight fixed bolt on 6- core pipe (public affairs), A ' 7- gas injection shell, A ' 8- soket head cap screw and A ' 9-；
1- swivel control head, 2- wellhead blowout preventor group, the nitrogen unit processed of 3- first, the nitrogen unit processed of 4- second, 5- pressurization unit,
The adjustable annular suction row's of the helping machine of 6- low-pressure gate valve group, 7- pressure release prizing body, 8- flowmeter, 9- well head liquid-operated flat valve, 10-1#
Structure, 11-2# it is adjustable annular suction Zhu Pai mechanism, 12- standpipe flap type, 13- low pressure gas injection pipeline, 14- high-pressure gas injection pipeline,
15-1# aspiration line, 16-2# aspiration line, sediment outflow pipeline, the well site 18- effluent sand pipeline, 19- automatic ignition dress in the well site 17-
It sets.
Specific embodiment
Hereinafter, it will come that the present invention will be described in detail helps Pai Jing based on adjustable annular suction in conjunction with exemplary embodiment
The safety work system of mouth combustible gas.
In an exemplary embodiment of the present invention, the safety based on the adjustable annular suction row's of helping well head combustible gas is made
Industry system may include sand discharge (or sand discharge) pipeline, the first adjustable annular suction Zhu Pai mechanism, igniter, air injection unit and the
One injection-gas manifold.
First adjustable annular suction Zhu Pai mechanism can be by well head and sand discharge pipeline direct or indirect connection.It is specific next
It says, the upstream end of the first adjustable annular suction Zhu Pai mechanism can take out with well head direct or indirect connection, the first adjustable annular
The downstream of Xi Zhupai mechanism can be connect with sand discharge pipeline.For example, the upstream end of the first adjustable annular suction Zhu Pai mechanism can
It is connected by the swivel control head of well head liquid-operated flat valve and well head.However, the invention is not limited thereto.In addition, first is adjustable
Annular suction Zhu Pai mechanism may be provided with adjustable annular spray channel, the adjustable annular spray channel and the first injection-gas manifold
Connection, to generate annular spray air-flow band, to form negative-pressure ward effect.The annular is around the first adjustable annular suction
The central axis of Zhu Pai mechanism is formed.It is described first it is adjustable annular suction Zhu Pai mechanism upstream end and downstream be relative to
For the fluid flow direction axially flowed.
Air injection unit is for generating inert gas (for example, nitrogen).For example, air injection unit is equivalent to an inert gas source.
Air injection unit may include one or two or more sets of nitrogen unit processed.Nitrogen unit processed can by one or two or more film nitrogen and
One or two or more air operated mechanism at.However, the invention is not limited thereto, other devices for being capable of forming inert gas are also
It can.
The inert gas that air injection unit generates can be provided to the first adjustable annular suction row of helping by the first injection-gas manifold
Mechanism, to form negative-pressure ward effect in the first adjustable annular suction Zhu Pai mechanism.For example, the first injection-gas manifold can will be lazy
Property gas be provided to first it is adjustable annular suction Zhu Pai mechanism the adjustable annular spray channel, with generate with axial direction incline
Oblique jet-stream wind, to form negative-pressure ward effect in the internal perisporium of the first adjustable annular suction Zhu Pai mechanism, in turn
Good suction is generated to the fluid containing fuel gas at the well head connecting with the first adjustable annular suction Zhu Pai mechanism
Effect.
Igniter may be provided at sediment outflow pipeline outlet end, and can light the fuel gas being discharged from sediment outflow pipeline.
Igniter can be automatic or long-range igniter, to further increase safe operation.
In an exemplary embodiment of the present invention, adjustable annular suction Zhu Pai mechanism can include: coaxial arrangement
Basic flange, gas injection shell, core public affairs pipe and upper core pipe.
It the left side of basic flange can be with well head direct or indirect connection.For example, the left side of basic flange can pass through well head
The connection of the swivel control head of liquid-operated flat valve and well head.The outer wall on the right side of basic flange is provided with outer conical surface.For example, basic
The outer wall of the right-hand end of the tube body of flange is in along the axial frustum of a cone curved surface with preset width.Basic flange also has along diameter
To the outer protruding portion outwardly protruded.For example, the outer protruding portion of basic flange can be flange shape in class.
Gas injection shell may include the left side with the first internal diameter, the right side with the second internal diameter and one or more
Gas injection joint.Wherein, the first internal diameter is greater than the second internal diameter, for example, the first internal diameter can be larger about 1/4 to 1/5 than the second internal diameter.
The left side of gas injection shell is fastenedly connected by anti-rotation component and the outer protruding portion of basic flange.Anti-rotation component can limit note
Relative rotation between gas shell and basic flange.For example, anti-rotation component can be interior polygonal screw, however the present invention is unlimited
In this.In addition, the structure that anti-rotation component here can also have convenient for artificially dismantling, thus needing replacing different size
Spray operation easy to disassemble when flange.The inner peripheral wall on the right side of gas injection shell is provided with the first screw thread.For example, gas injection shell
The inner peripheral wall of right-hand end may be provided with along axial first screw thread with preset width.Gas injection joint can be by the first internal diameter
Corresponding space is connected to via the first injection-gas manifold with air injection unit.For example, gas injection joint can pass through the inside of gas injection shell
Space is connected to injection channel, can also be directly connected to injection channel, so that the inert gas of air injection unit is logical by injection
Road is spurted into main body pipeline.Gas injection joint can be connected through a screw thread mode and be arranged on gas injection shell, can also be by casting always
Make realization connection.For example, gas injection joint can be through the left side that gas injection shell is arranged in.
The right side of core public affairs pipe can be inserted into the left side of upper core pipe, and pass through the inner peripheral wall of first seal and upper core pipe
It is in close contact.First seal can be made of mutually matched sealing ring with seal groove, however, the invention is not limited thereto,
The component that it can be realized effective sealing function also may be used.May be provided on the outer circle wall in the left side of core public affairs pipe can be with gas injection
The second screw thread that the first of shell is threadedly engaged.First screw thread and the second screw thread can be fitted close, so that core public affairs pipe is outside
Being moved to the left or moving right relative to gas injection shell is realized in pivoting under power effect, i.e., left and right in the axial direction is moved
It is dynamic.Core public affairs pipe also has internal conical surface on the inner peripheral wall to be formed to the left.For example, the left-hand end of the tube body of core public affairs pipe
The inner wall in portion is in along the axial frustum of a cone curved surface with preset width.The internal conical surface of core public affairs pipe can be outer with basic flange
Circular conical surface cooperation, to form adjustable injection channel.Injection channel is connected to gas injection joint.For example, injection channel can be in
The ring belt of dimension adjustable.For example, with the pivoting clockwise or counterclockwise under external force of core public affairs pipe,
It will be moved to the left or right under the cooperation of one screw thread and the second screw thread, and then accordingly realize the adjusting to injection channel size, very
When as the outer conical surface for completely attaching to basic flange when the internal conical surface of core public affairs pipe, realizes and close injection channel.
In addition, the core public affairs pipe may also include on the left side that core public affairs pipe is arranged in and be located at the second of core public affairs pipe
Evagination circumferential part on the left of screw thread, to further increase the first screw thread of gas injection shell and second being threadedly engaged for core public affairs pipes
Leakproofness.Here, the evagination circumferential part of core public affairs pipe can be the ring belt projected radially outward along core public affairs pipe, for example,
It can be flange shape in class.Further, it is also possible to further on the right side for being provided with the first screw thread of gas injection shell and core public affairs pipe
Second seal is set between outward flange, thereby further ensures that sealing effect.Second seal can be by mutually matched close
Seal and seal groove are constituted, however, the invention is not limited thereto, other components that can be realized effective sealing function also may be used.
In addition, core public affairs pipe can also further comprise that core public affairs pipe can be made to realize under external force to turn around central shaft
Dynamic revolution auxiliary section.Here, revolution auxiliary section may be provided at left side positioned at upper core pipe and the gas injection shell of core public affairs pipe
On outer wall between right side.For example, revolution auxiliary section can be to be located at upper core pipe and gas injection on the outer wall for be arranged in core public affairs pipe
One or more rotary holes at position between shell.It can be more easily to core public affairs pipe by setting revolution auxiliary section
Carry out rotation operation.However, the invention is not limited thereto, for example, rotation operation can be carried out to core public affairs pipe by fixture etc., or
Person can also rotate core public affairs pipe by upper core pipe in the case where upper core pipe and core public affairs pipe fixing compact cooperate.
Upper core pipe has the right side that can be connect with sediment outflow pipeline.For example, the right side of upper core pipe can be logical with sediment outflow pipeline
Cross flanged joint or clamp connection.
In addition, the first adjustable annular suction Zhu Pai mechanism can also further comprise upper core pipe method on the basis of the said structure
It is blue.Upper core pipe flange is convenient for for connecting with sediment outflow pipeline on the right side of upper core pipe.
In addition, the first adjustable annular suction Zhu Pai mechanism can also further comprise upper core pipe card on the basis of the said structure
Fitting.Upper core pipe shackle member can be by the right side of core public affairs pipe and upper core pipe clamping, and limits between upper core pipe and core public affairs pipe
Axial displacement avoid so as to more efficiently ensure the sealing effect of upper core pipe Yu core public affairs pipe because of core public affairs pipe
It moves left and right and causes core public affairs pipe and the sealing of upper core pipe insecure.However, the invention is not limited thereto, for example, can pass through
Coincidence system between the structure of first seal or the right side and the left side of upper core pipe of core public affairs pipe is rationally set and is overlapped
Scale ensures the sealing effect of upper core pipe Yu core public affairs pipe, and then avoids causing because of moving left and right for core public affairs pipe core public
It manages insecure with the sealing of upper core pipe.
Above-mentioned first adjustable annular suction Zhu Pai mechanism may be mounted at pithead position, and the swabbing action generated can incite somebody to action
Resulting fluid (heterogeneous fluids such as such as natural gas fuel gas or gas-solid mixing phase, gas-liquid-solid mixed phase etc.) is drawn to sediment outflow manifold
It is interior, to improve operational security.
In another exemplary embodiment of the invention, the safety based on the adjustable annular suction row's of helping well head combustible gas
Operating system can also further comprise the second adjustable annular suction on the basis of including the structure of the above exemplary embodiments
Zhu Pai mechanism and the second injection-gas manifold.
Second adjustable annular suction Zhu Pai mechanism may be provided at the turning of sediment outflow pipeline, for example, right angle turn.The
Two adjustable annular suction Zhu Pai mechanisms can connect the turning of sediment outflow pipeline two tube bodies in close proximity to one another, and right
The turning forms negative-pressure ward effect.Specifically, second it is adjustable annular suction Zhu Pai mechanism upstream end can with turn
The downstream of crook connection, the second adjustable annular suction Zhu Pai mechanism can be connect with a subsequent tube body.However, of the invention
It is without being limited thereto.In addition, the second adjustable annular suction Zhu Pai mechanism may be provided with adjustable annular spray channel, the adjustable ring
Shape injection channel is connected to the second injection-gas manifold, to generate annular spray air-flow band, to form negative-pressure ward effect.The ring
Shape is formed around the central axis of the second adjustable annular suction Zhu Pai mechanism.Second adjustable annular suction Zhu Pai mechanism
Upstream end and downstream be for along the fluid flow direction axially flowed.
The inert gas that air injection unit generates can be provided to the second adjustable annular suction row of helping by the second injection-gas manifold
Mechanism, to form negative-pressure ward effect in the second adjustable annular suction Zhu Pai mechanism.For example, the second injection-gas manifold can will be lazy
Property gas be provided to the adjustable annular spray channel of the second adjustable annular suction Zhu Pai mechanism, to generate and second adjustable
The axially inclined jet-stream wind of annular suction Zhu Pai mechanism, thus in the internal perisporium of the second adjustable annular suction Zhu Pai mechanism
Middle formation negative-pressure ward effect, and then the turning of the sediment outflow pipeline locating to the connection of the second adjustable annular suction Zhu Pai mechanism
Solid (for example, sand), gas, liquid or mixed phase generate good swabbing action.
It should be noted that the second adjustable annular suction Zhu Pai mechanism can have and the first adjustable annular suction row of helping
The identical structure of mechanism, difference are only that the second adjustable annular suction Zhu Pai mechanism is mounted on the turning of sediment outflow pipeline and leads to
The second injection-gas manifold is crossed to connect with air injection unit；And at the first adjustable annular suction Zhu Pai mechanism installation pithead position and pass through
First injection-gas manifold is connect with air injection unit.Specifically, for annular suction adjustable for second Zhu Pai mechanism, pass through
The left side of basic flange can be with the connection of sediment outflow pipeline corner, can be with the pipe after corner by the right side of upper core pipe
Body connection, and be connected to by the one or more gas injection joints and the second injection-gas manifold of gas injection shell with air injection unit.
Above-mentioned second adjustable annular suction Zhu Pai mechanism may be mounted at the positions such as pipeline turning downstream, the pumping generated
Suction effect may further be fluid (such as natural gas fuel gas or gas-solid mixing phase, gas-liquid-solid mixed phase in sediment outflow pipeline
Equal heterogeneous fluids etc.) suction force is provided, turning local losses or accumulation caused by fluid can also be greatly reduced.
In another exemplary embodiment of the invention, the safety based on the adjustable annular suction row's of helping well head combustible gas
Operating system can also further comprise third injection-gas manifold on the basis of including the mechanism of any of the above-described a exemplary embodiment
And supercharger.
The inlet end of supercharger is connect by valve with air injection unit, and supercharger can be to the indifferent gas from air injection unit
Body is increased.The quantity of supercharger can be one or more.Third injection-gas manifold is by the outlet side of supercharger and well
Mouth connection, is provided to well head to pass through pressurized inert gas.It can by setting third injection-gas manifold and supercharger
High-pressure inert gas (for example, nitrogen) is provided to well head, so as to make taking out based on adjustable annular for the present exemplary embodiment
High pressure nitrogen needed for the safety work system of the suction row's of helping well head combustible gas has nitrogen injection drilling operation.Third injection-gas manifold can be resistant to
By scheduled high pressure.High pressure range can determine according to field condition.For example, the specific pressure limit of high pressure can be not less than 21MPa.
In addition, in the present example embodiment, flowmeter, standpipe flap type, pressure release prizing body etc. can also be arranged in third injection-gas manifold
One or more of, so that detection flows and switch, pressure discharge operations are more convenient.
In addition, in the exemplified embodiment, safety work system may also include setting in air injection unit and first, the
Low-pressure gate valve group between two and third injection-gas manifold, consequently facilitating standing alone as the first, second, third gas injection by air injection unit
One or more in manifold is supplied.
Fig. 5 shows one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The structural schematic diagram of exemplary embodiment.
As shown in figure 5, in an exemplary embodiment of the present invention, it is flammable based on the adjustable annular suction row's of helping well head
The safety work system of gas can include: air injection unit, injection-gas manifold, sediment outflow pipeline, it is adjustable annular suction Zhu Pai mechanism and from
Dynamic igniter.
Air injection unit includes the first nitrogen unit processed 3, the second nitrogen unit 4 processed, pressurization unit 5.First nitrogen unit 3 processed is by 4
Air compressor machine and 1 film nitrogen composition, remaining air compressor machine and film nitrogen form the second nitrogen unit 4 processed, and two nitrogen units processed pass throughHose is connected in parallel to low-pressure gate valve group 6, and three outlet ends of low-pressure gate valve group 6 are separately connected 1# suction
Pipeline 10,2# aspiration line 11 and pressurization 5 air inlet low-pressure hose of unit, are switched by 6 channel of low-pressure gate valve group, meet different works
Nitrogen injection way changes under condition.
Injection-gas manifold includes low pressure injection-gas manifold 13, high-pressure gas injection pipeline 14, low-pressure gate valve group 6,1# aspiration line 15,2#
Aspiration line 16, pressure release prizing body 7 and flowmeter 8.Low pressure injection-gas manifold 13 refers to series connection air compressor machine, film nitrogen to low-pressure gate valve group 6,
And required for low-pressure gate valve group 6 to pressurization 5 import of unitHose.High-pressure gas injection pipeline 14, which refers to, to be connected
Pressurization 5 high-pressure outlet end of unit to standpipe flap type 12 is connect to be usedSteel pipeline will successively be let out
Pressure prizing body 7, flowmeter 8 are connected on high-pressure gas injection pipeline 14.1# aspiration line 15 is adopted from low-pressure gate valve group 6-Z1# gate valve port
WithHose is connected to 1# adjustable annular suction Zhu Pai mechanism 10；2# aspiration line 16 is from low pressure lock
Valve group 6-Z2# gate valve port usesHose is connected to 2# adjustable annular suction Zhu Pai mechanism 11.
The top that M42 Bolted Flanged Connection is mounted on wellhead blowout preventor group 2 can be used in swivel control head 1, controls from rotation
First 1 side outlet is sequentially connected sediment outflow pipeline in the adjustable annular suction Zhu Pai mechanism 10 of well head liquid-operated flat valve 9,1# and well site
17,17 latus rectum of sediment outflow pipeline in well sitePressure rank 7MPa, flanged joint；It is straight to pick out to well site, three
Lead to deflecting landing, is sequentially connected after 2# adjustable annular suction Zhu Pai mechanism 11, sampling short circuit, depositing dust are shorted to settling pit, well
Over-the-counter 18 latus rectum of sediment outflow pipelinePressure rank 4MPa, clamp connection.
Automatic electronic igniting device 11 is mounted on the outlet of well site effluent sand pipeline 18, real by remotely controlling ignition switch
The natural gas fired burning and exhausting now pumped out.
Fig. 1 a shows the one of the safety work system of the invention based on the adjustable annular suction row's of helping well head combustible gas
The schematic diagram of the section structure of adjustable annular suction Zhu Pai mechanism in a exemplary embodiment；Fig. 1 b shows the I's in Fig. 1
Partial enlargement diagram.Fig. 2 shows the safety work systems of the invention based on the adjustable annular suction row's of helping well head combustible gas
The adjustable annular suction row's of helping mechanical appearance schematic diagram in one exemplary embodiment of system.
As shown in Fig. 1 a, Fig. 1 b and Fig. 2, in an exemplary embodiment of the present invention, the adjustable annular suction row of helping
Mechanism (for example, the adjustable annular suction Zhu Pai mechanism 10 of 1# or 2# adjustable annular suction Zhu Pai mechanism 11 in Fig. 5) can wrap
It includes with lower component: basic flange A ' 1, gas injection joint A ' 2, upper core pipe A ' 3, upper core pipe flange A ' 4, upper core pipe snap ring A ' 5, core
Manage (public affairs) A ' 6, gas injection shell A ' 7, soket head cap screw A ' 8 and upper core pipe snap ring tight fixed bolt A ' 9 (showing in Fig. 2).
It is connected through a screw thread, can also be connected between upper core pipe flange A ' 4 and upper core pipe A ' 3 by welding, also
It can be by upper core pipe flange A ' 4 and upper core pipe A ' 3 workpiece as a whole.Upper core pipe flange A ' 4 is used to and downstream hard tube
Line connection, can be flanged joint, is also possible to clamp connection.Basic 1 left side flange A ', connects with well head or upstream hard tube line
It connects, can be flanged joint, be also possible to clamp connection.The right side of basic flange A ' 1 passes through one group of soket head cap screw A ' 8 and note
Gas shell A ' 7 is fastened.Gas injection shell A ' 7 is radial to open one group of hole (quantity is unlimited), and the mode being connected through a screw thread connects with gas injection
Head A ' 2 is connected.6 external cylindrical surface (major diameter) of core pipe (public affairs) A ' is equipped with screw thread.Core pipe (public affairs) A ' 6 passes through screw thread and gas injection shell
The connection of A ' 7.Core pipe (public affairs) A ' 6 is rotated, under the action of screw thread constrains and cooperates, a part in the left side of core pipe (public affairs) A ' 6
It can be moved left and right in gas injection shell A ' 7.It is linked on the left of core pipe (public affairs) A ' 6 in gas injection shell A ' 7.Upper core pipe snap ring A ' 5 has
It one group (2), is mutually tensed by upper core pipe snap ring tight fixed bolt A ' 9.Core pipe (public affairs) A ' 6 and upper core pipe A ' 3 pass through upper core
Pipe clamp ring A ' 5 limits mutual axial displacement.1 right side of internal conical surface and basis flange A ' in 6 left side core pipe (public affairs) A '
Outer conical surface between annular gap, that is, mechanism injection channel.
When adjustable annular suction Zhu Pai mechanism left and right ends are fixed (for example, 1 left side basis flange A ' and upstream hard tube
Line connection, upper core pipe flange A ' 4 are connect with downstream hard tube line；Alternatively, 1 left side basis flange A ' is connect with well head, upper core pipe method
Blue A ' 4 is connect with upstream hard tube line), adjustable annular aspirates only core pipe (public affairs) A ' 6 in all components of Zhu Pai mechanism and is
Movable part.Core pipe (public affairs) A ' 6 is rotated, under the action of screw thread, core pipe (public affairs) A ' 6 can be moved left and right, and moving distance can
It is designed according to demand.When core pipe (public affairs) A ' 6, which is moved to the left, to be at the end, the internal conical surface in 6 left side core pipe (public affairs) A '
It is contacted with the outer conical surface on basic 1 right side flange A ', to close injection channel；It, can when core pipe (public affairs) A ' 6 moves right
It is gradually opened injection channel.Even if in working condition, injection channel can also by way of rotating core pipe (public affairs) A ' 6 with
When adjust, be not necessarily to the other components of dismounting and change, without stop work wait.Fig. 1 a and Fig. 1 b show the adjustable annular suction row of helping
The opening state of the injection channel of mechanism.Fig. 3 a and Fig. 3 b show the pass of the injection channel of adjustable annular suction Zhu Pai mechanism
Closed state.
The quantity of gas injection joint A ' 2 on gas injection shell A ' 7 can be selected according to required tolerance size.When large-minded, note
2 reasonable quantity of gas connector A ' increases；When narrow-minded, extra gas injection joint A ' 2 can be blocked.Inert gas (for example, nitrogen) is logical
It crosses gas injection joint A ' 2 to be injected into inside gas injection shell A ' 7, and passes through the internal conical surface and lex fundamentalis in 6 left side core pipe (public affairs) A '
Annular gap (injection channel) high speed injection between the outer conical surface on blue 1 right side A ' is into main channel.The injection of high-speed flow
So that basic flange A ' 1 is nearby generated negative pressure with Involving velocity, to aspirate upstream fluid, while reducing the flowing resistance of upstream fluid
Power.When adjustable annular suction Zhu Pai mechanism is mounted near well head, it can be used for aspirating the fluid (combustible gas near well head
Body, drilling circulation fluid etc.) it avoids overflowing well head；When adjustable annular suction Zhu Pai mechanism is mounted on elbow bend downstream,
It can be used for reducing local losses when fluid flows through the elbow bend, keep flowing more smooth.Fig. 4 shows safety of the invention and makees
The appearance figure of adjustable annular suction Zhu Pai mechanism in one exemplary embodiment of industry system.
Illustrate the service condition of the present exemplary embodiment below in conjunction with Fig. 5.
(≤10000m under the conditions of stratum goes out a small amount of natural gas3/ d), when nitrogen drilling operation, close Z1#, Z2#, C1#,
C2# flap type opens Z3#, Z4#, Z5# flap type, the nitrogen warp of the first nitrogen unit 3 processed and the second common output of nitrogen unit 4 processed
Low-pressure gate valve group 6 enters pressurization unit 5 from Z3# flap type port, enters standpipe through high-pressure gas injection pipeline 14 after pressurization, meet
Nitrogen amount needed for nitrogen injection drilling operation.
(≤10000m under the conditions of stratum goes out a small amount of natural gas3/ d), when carrying out round trip during nitrogen injection drilling, not
When taking out 1 assembly of swivel control head, wellhead sealing, a small amount of natural gas of stratum output is gradually invaded in pit shaft, overflows the day of pit shaft
Right gas enters the burning emptying of sediment outflow pipeline；1 assembly of swivel control head is taken out, well head opens wide, and implements nitrogen suction method, it is ensured that will
The natural aspiration of pit shaft is directed at the burning emptying of sediment outflow pipeline, opens Z1#, Z2#, C1#, C2# flap type, it is flat to close Z3#, Z4#, Z5#
Plate valve, the nitrogen unit 3 processed of unlatching first, the second nitrogen unit 4 processed are adjustable to 1# adjustable annular suction Zhu Pai mechanism 10,2# respectively
Suction nitrogen injects in annular suction Zhu Pai mechanism 11, according to the actual situation, the controllable adjustable annular suction row's of the helping machine of difference
Injection nitrogen amount at structure, it is ensured that well head is overflowed without natural gas.For example, the nitrogen amount of 1# adjustable annular suction Zhu Pai mechanism 10
It can be 45~75m3/min；The nitrogen amount of 2# adjustable annular suction Zhu Pai mechanism 11 can be 15~45m3/min。
(≤10000m under the conditions of stratum goes out a small amount of natural gas3/ d), when carrying out replacement glue core operation during nitrogen injection drilling,
Stop injecting nitrogen to standpipe, by pressure release prizing body 7 by nitrogen purge, adjusts nitrogen discharge capacity and meet suction needs, establish suction
Z1#, Z2#, C1#, C2# flap type are first opened in channel, turn off Z3#, Z4#, Z5# flap type, and natural gas in pit shaft is taken out in realization
It is drawn to the burning emptying of sediment outflow pipeline, ensures that replacement glue core operation overall process overflows well head without natural gas, it is ensured that construction safety.
In conclusion the safety work device of inert gas suction well head fuel gas of the invention includes in following characteristics
It is one or more:
(1) adjustable annular suction Zhu Pai mechanism is added on sediment outflow pipeline, by injecting nitrogen, In into sediment outflow pipeline
When nitrogen is to sediment outflow pipeline export direction flow at high speed, certain suction force is generated in pithead position, by the natural gas of stratum output
Suction is directed in sediment outflow pipeline, and natural gas is avoided to overflow well head, promotes the safety for the spacious well operations such as make a trip, replace glue core；
(2) two adjustable annular suction Zhu Pai mechanisms are installed, it is ensured that suction effect, the adjustable annular suction row's of the helping machine of 1#
Structure is mounted on swivel control head proximal outlet position, and the adjustable annular suction Zhu Pai mechanism of 2# is mounted on sediment outflow pipeline in well site
" Z " font lands threeway position, and suction force is substantially improved in the setting of double adjustable annular suction Zhu Pai mechanisms, it is ensured that pit shaft natural gas
Suction is directed in sediment outflow pipeline, and can be conducive to sand discharge；
(3) it uses split type injection-gas manifold structure to design, introduces low-pressure gate valve group, by switching its channel to meet
Nitrogen injection way needs under different working conditions, and the different adjustable annular suction row's of helping mechanism position nitrogen injection rate tune
Control；The equipment of making nitrogen is resolved into two nitrogen units processed (for example, one of them nitrogen unit processed includes 4 air compressor machines and 1 film system
Nitrogen, remaining air compressor machine and film nitrogen are as another nitrogen unit processed), the nitrogen of two nitrogen unit outputs processed is connected in parallel to low pressure lock
Valve group, into supercharger, low-pressure gate valve group other two port connects the one of port connection low-pressure hose of low-pressure gate valve group respectively
Two low-pressure hoses are connect to 1#, 2# adjustable annular suction Zhu Pai mechanism, so as to switch low-pressure gate valve group according to different operating conditions
Realize following functions in channel: nitrogen amount needed for providing nitrogen injection drilling when drilling well provides when suction and aspirates required nitrogen amount, and can
Different adjustable annular suction Zhu Pai mechanisms injection nitrogen amount is regulated and controled；
(4) sediment outflow pipeline outlet installs automatic ignition device, during nitrogen pumping operation, will be taken out by automatic ignition device
It is drawn to the natural gas fired burning of sediment outflow pipeline outlet, realizes safely cleaning discharge；
(5) by it is adjustable annular suction Zhu Pai mechanism carry out different number, different location integrated application, it can be achieved that
To effective pumping of resulting fluid (in addition to comprising aforementioned fuel gas, also comprising returning the heterogeneous fluid for being discharged to earth's surface in drilling process)
It inhales, by resulting fluid (such as fuel gas: natural gas；Such as heterogeneous fluid: gas-solid, gas-liquid-solid) it is drawn in sediment outflow manifold, and
Local losses is greatly reduced in earth's surface drain pipe flow transmission process.
Although having been combined exemplary embodiment above and attached drawing describing the present invention, those of ordinary skill in the art
It will be apparent to the skilled artisan that can be carry out various modifications to above-described embodiment in the case where not departing from spirit and scope of the claims.
Claims (10)
1. a kind of safety work system based on the adjustable annular suction row's of helping well head combustible gas, the safety work system include
Sand discharge pipeline, which is characterized in that the safety work system further includes the first adjustable annular suction Zhu Pai mechanism, igniting dress
It sets, air injection unit and the first injection-gas manifold, wherein
The suction Zhu Pai mechanism includes basic flange, gas injection shell, core public affairs pipe and the upper core pipe of coaxial arrangement, wherein base
Plinth flange has the left side that can be connect with well head, the right side with outer conical surface, and radially protrudes outer
Protruding portion；Gas injection shell include the left side with the first internal diameter, the right side with the second internal diameter and one or more
Gas injection joint, wherein first internal diameter is greater than second internal diameter, and the left side of the gas injection shell passes through anti-rotation structure
The outer protruding portion of part and the basic flange is fastenedly connected, and the inner periphery of the right side of the gas injection shell is provided with the first spiral shell
Line, the gas injection joint are connected to space corresponding to first internal diameter；Core public affairs pipe includes being inserted into the left side of core pipe simultaneously
And the right side being in close contact by the inner peripheral wall of first seal and upper core pipe, the left side with the second screw thread, and
It is formed in internal conical surface on the inner periphery of the left side of core public affairs pipe, wherein second screw thread is arranged in core public affairs pipe
Outer wall on and can be threadedly engaged with described first, with correspond to core public affairs pipe pivoting realize core public affairs pipe relative to
Gas injection shell is moved to the left or right, and the internal conical surface can be mutual with the outer conical surface of the right side of the basic flange
Cooperation to form adjustable injection channel be connected to the gas injection joint, thus corresponding to core public affairs pipe it is described to the left or
It moves right and accordingly realizes closing or opening for injection channel；Upper core pipe has the right side that can be connect with sediment outflow pipeline；
The air injection unit generates inert gas；
Air injection unit is generated and is connect with the gas injection joint of the first adjustable annular suction Zhu Pai mechanism by first injection-gas manifold,
To form negative-pressure ward effect in the first adjustable annular suction Zhu Pai mechanism；
The igniter is arranged in sediment outflow pipeline outlet end and can light the fuel gas being discharged from sediment outflow pipeline.
2. the safety work system according to claim 1 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is, the safety work system further includes the second adjustable annular suction Zhu Pai mechanism and the second injection-gas manifold, described the
The turning of sediment outflow pipeline is arranged in two adjustable annular suction Zhu Pai mechanisms；Second injection-gas manifold generates air injection unit
Inert gas be provided to second it is adjustable annular suction Zhu Pai mechanism with second it is adjustable annular suction Zhu Pai mechanism in shape
It is acted at negative-pressure ward.
3. the safety work system according to claim 1 or 2 based on the adjustable annular suction row's of helping well head combustible gas,
It is characterized in that, the safety work system further includes third injection-gas manifold and supercharger, and the inlet end of the supercharger passes through valve
Door is connect with air injection unit, and the outlet side of supercharger is connected to by the third injection-gas manifold with well head, and third injection-gas manifold can
It is resistant to scheduled high pressure.
4. the safety work system according to claim 3 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the safety work system further includes low-pressure gate valve group, and low-pressure gate valve group setting is in air injection unit and first, the
Between two and third injection-gas manifold.
5. the safety work system according to claim 3 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the safety work system further includes the flowmeter being arranged in third injection-gas manifold, standpipe flap type or pressure release sled
Body.
6. the safety work system according to claim 1 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the suction Zhu Pai mechanism further includes upper core pipe shackle member, and the upper core pipe shackle member can be by the right side of core public affairs pipe
Side and upper core pipe clamping simultaneously limit the axial displacement between upper core pipe and core public affairs pipe.
7. the safety work system according to claim 1 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the core public affairs pipe further includes the revolution cooperation that core public affairs pipe can be made to realize the pivoting under external force
Portion.
8. the safety work system according to claim 7 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the right side in the left side and gas injection shell positioned at the upper core pipe of core public affairs pipe is arranged in the revolution auxiliary section
On outer wall between portion.
9. the safety work system according to claim 1 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the air injection unit includes one or two or more sets of nitrogen unit processed.
10. the safety work system according to claim 1 based on the adjustable annular suction row's of helping well head combustible gas, special
Sign is that the first adjustable annular suction Zhu Pai mechanism is connected by the swivel control head of well head liquid-operated flat valve and well head
It connects.
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| CN201910840086.1A CN110410040A (en) | 2019-09-06 | 2019-09-06 | A kind of safety work system based on the adjustable annular suction row's of helping well head combustible gas |
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