CN104453754B - Bidirectional channel check valve and method for washing sand and well by using bidirectional channel check valve - Google Patents
Bidirectional channel check valve and method for washing sand and well by using bidirectional channel check valve Download PDFInfo
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- CN104453754B CN104453754B CN201410633675.XA CN201410633675A CN104453754B CN 104453754 B CN104453754 B CN 104453754B CN 201410633675 A CN201410633675 A CN 201410633675A CN 104453754 B CN104453754 B CN 104453754B
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- 239000004576 sand Substances 0.000 title claims abstract description 120
- 238000005406 washing Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002457 bidirectional effect Effects 0.000 title 2
- 238000011010 flushing procedure Methods 0.000 claims abstract description 135
- 239000012530 fluid Substances 0.000 claims abstract description 58
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 238000007596 consolidation process Methods 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 description 18
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003027 oil sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention provides a two-way channel check valve and a method for flushing a sand and a well by utilizing the two-way channel check valve, wherein the two-way channel check valve is connected between a rotary jet flow sand washer and an oil pipe; a flow guide channel is arranged in the upper joint; the inner upper end of the lower joint is provided with a forward channel, and the inner lower end of the lower joint is provided with a reverse channel; a valve ball and a spring are arranged in the reverse channel. Compared with the existing oil sleeve annulus of the flow-back fluid channel, the flow-back fluid channel has the advantages that the channel section is obviously reduced, the flow-back flow rate is also obviously improved, the flow-back flow rate is effectively improved under the condition of the same discharge capacity, the sand suspension and flow-back of a shaft sand of a horizontal well section are facilitated, and the sand washing effect of the horizontal well is improved.
Description
Technical field
The invention belongs to a kind of duplex channel ball-and-seat and the method using this duplex channel ball-and-seat sand-flushing.
Background technology
Horizontal well sand washing technology mainly has continuous sand flushing technology and two kinds of discontinuous sand washing technology at present.
The representative predominantly coiled tubing continuous sand flushing technology of continuous sand flushing technology, the commutation of plain tubing down-hole are even
Continuous sand washing technology, concentric tube continuous sand flushing technology；
Coiled tubing sand washing technology sand washing efficiency high, tubular column structure are simple and convenient to operate, but high cost, for well rail
Under mark complexity, long horizontal sections horizontal well tubing string, fashionable easily causing bends even locked, backfin, limited by the application of scene；
Plain tubing down-hole commutation continuous sand flushing technology relies primarily on supporting inverse well-flushing valve, down-hole fluid flow steering gear is realized even
Continuous sand washing, when sand bury section longer when, need supporting multiple flushing valve instruments（Well head often connects an oil pipe to be needed to connect a well-flushing
Valve）, flushing valve, the sealing of steering gear are crucial, when any one instrument is poorly sealed, leakage when, all can cause whole punching
Sand washing well process pipe string " short-circuit ", sand-flushing lost efficacy, and fluid diversion cup packer, when deep-well is applied, is susceptible to simultaneously
Breakage, leads to this technology effect of field application preferable not to the utmost；
Concentric tube continuous sand flushing technology is mainly the dependence special concentric oil tubes of configuration and sets up independent reverse circulation passage, passes through
Wellhead liquid flow turns to and realizes continuous sand flushing well-flushing, and the main weak point of this technique is to need configuration to process special concentric oil tubes, right
In the horizontal well that well depth is larger, horizontal segment is longer, application is limited.
What horizontal well discontinuous sand-flushing technology was representative is that beveled tip sand washing technology, rotating jet sand washing machine just follow
Ring sand-flushing technology.
Beveled tip sand washing technology is little due to shaft bottom impulsive force, for the higher pit shaft sand washing of the horizontal segment oil-sand degree of consolidation, imitates
Really poor；
In order to increase the impulsive force to long-pending sand for the net horizontal section sand washing machine, it is sufficiently stirred for, suspend long-pending sand, rotary jet device just follows
The application of ring sand-flushing technology scene is relatively common, but this Technology is due to cannot carry out reacting cycle well-flushing, direct circulation simultaneously
During sand-flushing operation, the row's of returning channel cross-section is larger, high to the row's of returning displacement requirements.
Content of the invention
Present invention aim to address existing rotary jet device direct circulation sand-flushing method cannot be carried out reacting cycle and be washed
Well, and during direct circulation sand-flushing operation, the row's of returning channel cross-section is larger, lead to returns the little problem of drainage speed.
For this reason, the invention provides a kind of duplex channel ball-and-seat, this duplex channel ball-and-seat is connected to rotating jet punching
Between sand device and oil pipe, the upper end of described duplex channel ball-and-seat is provided with the top connection for being connected with rotating jet sand washing machine,
Lower end is provided with the lower contact for being connected with oil pipe；
Axially disposed in described top connection have flow-guiding channel；
It is provided with forward channel and the backward channel be arrangeding in parallel with forward channel in described lower contact；
It is provided with spring and valve ball, valve ball is positioned close to one end of top connection, spring is arranged in described backward channel
The left side of valve ball.
Described forward channel includes horizontal forward channel and oblique forward channel, horizontal forward channel and oblique forward channel
Connect, and oblique forward channel is connected with flow-guiding channel.
Described backward channel includes horizontal backward channel and oblique backward channel, horizontal backward channel and oblique backward channel
Connection, and oblique backward channel is downward-sloping.
Described valve ball and spring is each provided in horizontal backward channel.
Described horizontal backward channel includes horizontal backward channel one and the horizontal reverse connecting with this horizontal backward channel one
To passage two, described horizontal backward channel two is connected with oblique backward channel.
Described valve ball and spring is each provided in horizontal backward channel one.
The diameter with diameter greater than horizontal backward channel two of described horizontal backward channel one.
The diameter with diameter greater than horizontal backward channel two of described valve ball, and valve ball is located at close horizontal backward channel two
One end.
A kind of method realizing horizontal well sand washing well-flushing using this duplex channel ball-and-seat, comprises the steps：
1）Duplex channel ball-and-seat is installed：The top connection of duplex channel ball-and-seat passes through screw thread with rotating jet sand washing machine even
Connect, lower contact is connected with oil pipe by screw thread；
2）Well-flushing step：
2a) sand-flushing liquid pump is entered oil pipe, carry out direct flushing：Flushing fluid enters forward channel, valve ball by oil pipe
Close, flushing fluid flows into flow-guiding channel by forward channel, enter rotating jet sand washing machine, flushing fluid is rotated jet flow sand washing
Device forms rotating jet and pressure vibration in net horizontal section, and under the impact of flushing fluid is stirred, the consolidation of net horizontal section amasss sand quilt
Destroy, and make the long-pending fully dispersed suspension of sand, stop direct flushing；
2b) sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing：Flushing fluid level of agitation well section is in step
2a）The middle sand grains being suspended by dispersion, returns discharge opeing and carries sand grains from the horizontal backward channel two of oblique backward channel entrance, valve ball is returning
Under the thrust of discharge opeing, separate with horizontal backward channel two, spring contraction, return the horizontal backward channel of discharge opeing entrance one, flow into oil pipe.
2c）Flushing fluid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
Beneficial effects of the present invention：On horizontal well rotating jet direct circulation sand-flushing Process ba- sis, the present invention passes through
Design rotating jet sand washing machine supporting duplex channel ball-and-seat achieves rotating jet square impact backwash sand-flushing new method；Newly side
It is oil pipe that method returns apocenosis passage, returns apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, and returns drainage speed
Also significantly improve, under the conditions of same displacement, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, return
Row, well sand washing effect of improving the standard.
Below with reference to accompanying drawing, the present invention is described in further details.
Brief description
Fig. 1 is the structural representation of duplex channel ball-and-seat.
Fig. 2 is the scheme of installation of duplex channel ball-and-seat.
Description of reference numerals, 1, top connection；2nd, lower contact；3rd, spring；4th, valve ball；5th, backward channel；501st, level is reverse
Passage；5a, horizontal backward channel one；5b, horizontal backward channel two；502nd, oblique backward channel；6th, forward channel；601st, level
Forward channel；602nd, oblique forward channel；7th, flow-guiding channel；8th, duplex channel ball-and-seat；9th, oil pipe；10th, rotating jet sand washing
Device.
Specific embodiment
The invention provides a kind of duplex channel ball-and-seat, as shown in Fig. 2 this duplex channel ball-and-seat is connected to rotary irradiating
Between stream sand washing machine 10 and oil pipe 9, the concrete structure of this duplex channel ball-and-seat and application mode are carried out below in conjunction with accompanying drawing
Detailed description.
As shown in Figure 1（The direction of described below is 1 is stated referring to the drawings）, this duplex channel ball-and-seat 8 upper
End is provided with the top connection 1 for being connected with rotating jet sand washing machine 10, and lower end is provided with the lower contact 2 for being connected with oil pipe 9, on
It is provided with flow-guiding channel 7, axially disposed in described top connection 1 have flow-guiding channel 7 in joint 1；It is provided with described lower contact 2
Forward channel 6 and the backward channel 5 be arrangeding in parallel with forward channel 6；It is provided with spring 3 and valve ball 4, valve ball 4 in backward channel 5
It is positioned close to one end of top connection 1, spring 3 is arranged on the left side of valve ball 4, described flow-guiding channel 7 level is located at top connection 1
Interior, and one end of this flow-guiding channel 7 extends into lower contact 2, forward channel 6 include again horizontal forward channel 601 and oblique just
To passage 602, horizontal forward channel 601 connects with oblique forward channel 602, and oblique forward channel 602 is with flow-guiding channel 7 even
Logical, and backward channel 5 includes horizontal backward channel 501 and oblique backward channel 502, horizontal backward channel 501 and oblique instead
Connect to passage 502, and oblique backward channel 502 is downward-sloping.
Further, valve ball 4 and spring 3 are each provided in horizontal backward channel 501, and horizontal backward channel 501 includes
Horizontal backward channel one 5a and horizontal backward channel two 5b connecting with this horizontal backward channel one 5a, described horizontal backward channel
Two 5b are connected with oblique backward channel 502.Described valve ball 4 and spring 3 are each provided in horizontal backward channel one 5a, and level is reverse
The diameter with diameter greater than horizontal backward channel two 5b of passage one 5a.Valve ball 4 straight with diameter greater than horizontal backward channel two 5b
Footpath, and valve ball 4 is located at the one end near horizontal backward channel two 5b.
Embodiment 1
As depicted in figs. 1 and 2, the upper end of this duplex channel ball-and-seat 8 is provided with for being connected with rotating jet sand washing machine 10
Top connection 1, lower end is provided with the lower contact 2 for being connected with oil pipe 9, is provided with flow-guiding channel 7 in top connection 1, described under connect
It is provided with forward channel 6 and the backward channel 5 be arrangeding in parallel with forward channel 6 in 2, in backward channel 5, be provided with valve ball 4 He
Spring 3.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, so that spring 3 is pressed
Contracting, and then spring 3 contacts even closer with valve ball 4, gap between the two is less, and valve ball 4 is closed, and flushing fluid passes through positive leading to
Road 6 flows into flow-guiding channel 7, enters rotating jet sand washing machine 10, and flushing fluid is rotated jet flow sand washing machine 10 in net horizontal section shape
Become rotating jet and pressure vibration, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and so that long-pending sand is filled
Dispersion suspends, and stops direct flushing；Sand-flushing pendular ring sky is pumped into sleeve pipe, carries out reacting cycle well-flushing：Flushing fluid stirs
The sand grains that net horizontal section is suspended by dispersion in direct flushing, returns discharge opeing and carries sand grains entrance backward channel 5, valve ball 4 is returning
Under the thrust of discharge opeing, press to spring 3, spring 3 shrinks, return discharge opeing and flow out backward channel 5, flow into oil pipe 9, flushing fluid or return discharge opeing
Return out ground, horizontal well sand washing clean-out service completes.
Return apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, return drainage speed and also significantly improve,
Under the conditions of same displacement, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, improve the standard
Well sand washing effect.
Embodiment 2
On the basis of embodiment 1, further, as shown in figure 1, described forward channel 6 includes horizontal forward channel 601
With oblique forward channel 602, horizontal forward channel 601 connects with oblique forward channel 602, and oblique forward channel 602 with lead
Circulation road 7 connects.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, so that spring 3 is pressed
Contracting, and then spring 3 contacts even closer with valve ball 4, gap between the two is less, and valve ball 4 is closed, and flushing fluid just initially enters
To the horizontal forward channel 601 in passage 6, enter back into oblique forward channel 602, due to the inclination of oblique forward channel 602,
In the presence of gravity, flushing fluid flows into flow-guiding channel 7, enters rotating jet sand washing machine 10, flushing fluid is rotated jet flow sand washing
Device 10 forms rotating jet and pressure vibration in net horizontal section, and under the impact of flushing fluid is stirred, the consolidation of net horizontal section amasss sand
Destroyed, and make the long-pending fully dispersed suspension of sand, stop direct flushing；Sand-flushing pendular ring sky is pumped into sleeve pipe, counter is followed
Washing-round well：The sand grains that flushing fluid level of agitation well section is suspended by dispersion in direct flushing, returns discharge opeing and carries sand grains entrance instead
To passage 5, valve ball 4, under the thrust returning discharge opeing, presses to spring 3, and spring 3 shrinks, and returns discharge opeing and flows out backward channel 5, flows into oil
Pipe 9, flushing fluid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
Return apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, return drainage speed and also significantly improve,
Under the conditions of same displacement, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, improve the standard
Well sand washing effect.
Embodiment 3
On the basis of embodiment 1, backward channel 5 includes horizontal backward channel 501 and oblique backward channel 502, water again
Flat backward channel 501 connects with oblique backward channel 502, and oblique backward channel 502 is downward-sloping.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, so that spring 3 is pressed
Contracting, and then spring 3 contacts even closer with valve ball 4, gap between the two is less, and valve ball 4 is closed, and flushing fluid enters positive leading to
Road 6, enters back into flow-guiding channel 7, enters rotating jet sand washing machine 10, and flushing fluid is rotated jet flow sand washing machine 10 in net horizontal section
Form rotating jet and pressure vibration, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and makes long-pending sand
Fully dispersed suspension, stops direct flushing；Sand-flushing pendular ring sky is pumped into sleeve pipe, carries out reacting cycle well-flushing：Flushing fluid stirs
The sand grains that dynamic net horizontal section is suspended by dispersion in direct flushing, return discharge opeing carry sand grains enter backward channel 5 in oblique
Backward channel 502, enters back into horizontal backward channel 501, and valve ball 4, under the thrust returning discharge opeing, presses to spring 3, and spring 3 shrinks,
Return discharge opeing and flow out backward channel 5, flow into oil pipe 9, flushing fluid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
Return apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, return drainage speed and also significantly improve,
Under the conditions of same displacement, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, improve the standard
Well sand washing effect.
Embodiment 4
On the basis of embodiment 3, further, valve ball 4 and spring 3 are each provided in horizontal backward channel 501.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, so that spring 3 is pressed
Contracting, and then spring 3 contacts even closer with valve ball 4, gap between the two is less, and valve ball 4 is closed, and flushing fluid enters positive leading to
Road 6, enters back into flow-guiding channel 7, enters rotating jet sand washing machine 10, and flushing fluid is rotated jet flow sand washing machine 10 in net horizontal section
Form rotating jet and pressure vibration, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and makes long-pending sand
Fully dispersed suspension, stops direct flushing；Sand-flushing pendular ring sky is pumped into sleeve pipe, carries out reacting cycle well-flushing：Flushing fluid stirs
The sand grains that dynamic net horizontal section is suspended by dispersion in direct flushing, return discharge opeing carry sand grains enter backward channel 5 in oblique
Backward channel 502, enters back into horizontal backward channel 501, because valve ball 4 and spring 3 are each provided in horizontal backward channel 501, because
This valve ball 4, under the thrust returning discharge opeing, presses to spring 3, and spring 3 shrinks, and returns discharge opeing and flows out backward channel 5, flows into oil pipe 9, wash
Well liquid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
Return apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, return drainage speed and also significantly improve,
Under the conditions of same displacement, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, improve the standard
Well sand washing effect.
Embodiment 5
On the basis of embodiment 3, horizontal backward channel 501 includes horizontal backward channel one 5a and reverse with this level again
Horizontal backward channel two 5b of passage one 5a connection, described horizontal backward channel two 5b are connected with oblique backward channel 502.Described
Valve ball 4 and spring 3 are each provided in horizontal backward channel one 5a, and horizontal backward channel one 5a with diameter greater than horizontal backward channel
The diameter of two 5b.The diameter with diameter greater than horizontal backward channel two 5b of valve ball 4, and valve ball 4 is located at close horizontal backward channel
One end of two 5b.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, so that spring 3 is pressed
Contracting, and then spring 3 contacts even closer with valve ball 4, gap between the two is less, and valve ball 4 is closed, and flushing fluid just initially enters
To the horizontal forward channel 601 in passage 6, enter back into oblique forward channel 602, due to the inclination of oblique forward channel 602,
In the presence of gravity, flushing fluid flows into flow-guiding channel 7, enters rotating jet sand washing machine 10, flushing fluid is rotated jet flow sand washing
Device 10 forms rotating jet and pressure vibration in net horizontal section, and under the impact of flushing fluid is stirred, the consolidation of net horizontal section amasss sand
Destroyed, and make the long-pending fully dispersed suspension of sand, stop direct flushing；Sand-flushing pendular ring sky is pumped into sleeve pipe, counter is followed
Washing-round well：The sand grains that flushing fluid level of agitation well section is suspended by dispersion in direct flushing, returns discharge opeing and carries sand grains entrance instead
To the oblique backward channel 502 in passage 5, enter back into horizontal backward channel two 5b in horizontal backward channel 501, due to valve ball
4 and spring 3 be each provided in horizontal backward channel one 5a, and horizontal backward channel one 5a with diameter greater than horizontal backward channel two 5b
Diameter, in addition, the diameter with diameter greater than horizontal backward channel two 5b of valve ball 4, therefore valve ball 4 under the thrust returning discharge opeing,
Press to spring 3, spring 3 shrinks, return discharge opeing and flow out backward channel 5, flow into oil pipe 9, flushing fluid or return discharge opeing and return out ground, level
Well sand-flushing operation completes.
Return apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, return drainage speed and also significantly improve,
Under the conditions of same displacement, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, improve the standard
Well sand washing effect.
Embodiment 6
A kind of method realizing horizontal well sand washing well-flushing using this duplex channel ball-and-seat, comprises the steps：
1）Duplex channel ball-and-seat 8 is installed：Screw thread and rotating jet sand washing are passed through in the top connection 1 of duplex channel ball-and-seat 8
Device 10 connects, and lower contact 2 is connected with oil pipe 9 by screw thread；
2）Well-flushing step：
2a) sand-flushing liquid pump is entered oil pipe 9, carry out direct flushing：Flushing fluid enters forward channel 6 by oil pipe 9, by
In the thrust of flushing fluid, so that spring 3 is compressed, and then spring 3 contacts with valve ball 4 even closer, further makes valve ball 4 and water
Flat backward channel two 5b contact is tighter, and gap between the two is less, and that is, valve ball 4 is closed, and flushing fluid is flowed into by forward channel 6
Flow-guiding channel 7, enters rotating jet sand washing machine 10, and flushing fluid is rotated jet flow sand washing machine 10 and forms rotary irradiating in net horizontal section
Stream and pressure vibration, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and makes long-pending sand fully dispersed outstanding
Floating, stop direct flushing；
2b) sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing：Flushing fluid level of agitation well section is in step
2a）The middle sand grains being suspended by dispersion, returns discharge opeing and carries sand grains from oblique backward channel 502 entrance horizontal backward channel two 5b, valve
Ball 4, under the thrust returning discharge opeing, is separated with horizontal backward channel two 5b, spring 3 shrinks, returns the horizontal backward channel of discharge opeing entrance one
5a, flows into oil pipe 9.
2c）Flushing fluid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
On horizontal well rotating jet direct circulation sand-flushing Process ba- sis, the present invention passes through to design rotating jet sand washing machine
Supporting duplex channel ball-and-seat achieves rotating jet square impact backwash sand-flushing new method；It is oil that new method returns apocenosis passage
Pipe, returns apocenosis passage oil jacket annular space with respect to existing, its channel cross-section substantially diminishes, returns drainage speed and also significantly improve, in phase
Under the conditions of discharge capacity, return effectively improving of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, improve the standard Jing Chong
Sand effect.
The only illustration to the present invention exemplified as above, does not constitute the restriction to protection scope of the present invention, all
It is that same or analogous design belongs within protection scope of the present invention with the present invention.
Claims (9)
1. a kind of realize the method for horizontal well sand washing well-flushing it is characterised in that comprising the steps using duplex channel ball-and-seat：
1）Duplex channel ball-and-seat is installed（8）：Duplex channel ball-and-seat（8）Top connection（1）Rushed with rotating jet by screw thread
Sand device（10）Connect, lower contact（2）By screw thread and oil pipe（9）Connect；
2）Well-flushing step：
2a) sand-flushing liquid pump is entered oil pipe（9）, carry out direct flushing：Flushing fluid is by oil pipe（9）Enter forward channel（6）,
Valve ball（4）Close, flushing fluid passes through forward channel（6）Flow into flow-guiding channel（7）, enter rotating jet sand washing machine（10）, well-flushing
Liquid band moves rotating jet sand washing machine（10）Form rotating jet and pressure vibration in net horizontal section, in the impact stirring of flushing fluid
Under, the consolidation of net horizontal section is amassed sand and is destroyed, and makes the long-pending fully dispersed suspension of sand, stops direct flushing；
2b) sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing：Flushing fluid level of agitation well section is in step 2a）In
The sand grains being suspended by dispersion, returns discharge opeing and carries sand grains from oblique backward channel（502）Enter horizontal backward channel two（5b）, valve ball
（4）Under the thrust returning discharge opeing, with horizontal backward channel two（5b）Separate, spring（3）Shrink, return discharge opeing entrance level and reversely lead to
Road one（5a）, flow into oil pipe（9）；
2c）Flushing fluid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
2. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 1, its feature
It is, this duplex channel ball-and-seat（8）It is connected to rotating jet sand washing machine（10）And oil pipe（9）Between, described duplex channel list
Stream valve（8）Upper end be provided with for rotating jet sand washing machine（10）The top connection connecting（1）, lower end be provided with for oil pipe
（9）The lower contact connecting（2）；
Described top connection（1）Interior axially disposed have flow-guiding channel（7）；
Described lower contact（2）Inside it is provided with forward channel（6）And with forward channel（6）The backward channel be arrangeding in parallel（5）, and just
To passage（6）With flow-guiding channel（7）Communicate；
Described backward channel（5）Inside it is provided with spring（3）And valve ball（4）, valve ball（4）It is positioned close to top connection（1）One end,
Spring（3）It is arranged on valve ball（4）Left side.
3. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 2, its feature
It is, described forward channel（6）Including horizontal forward channel（601）With oblique forward channel（602）, horizontal forward channel
（601）With oblique forward channel（602）Connection, and oblique forward channel（602）With flow-guiding channel（7）Connection.
4. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 2, its feature
It is, described backward channel（5）Including horizontal backward channel（501）With oblique backward channel（502）, horizontal backward channel
（501）With oblique backward channel（502）Connection, and oblique backward channel（502）Downward-sloping.
5. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 4, its feature
It is, described valve ball（4）And spring（3）It is each provided at horizontal backward channel（501）Interior.
6. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 4, its feature
It is, described horizontal backward channel（501）Including horizontal backward channel one（5a）And with this horizontal backward channel one（5a）Even
Logical horizontal backward channel two（5b）, described horizontal backward channel two（5b）With oblique backward channel（502）Connection.
7. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 6, its feature
It is, described valve ball（4）And spring（3）It is each provided at horizontal backward channel one（5a）Interior.
8. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 6, its feature
It is, described horizontal backward channel one（5a）With diameter greater than horizontal backward channel two（5b）Diameter.
9. a kind of method realizing horizontal well sand washing well-flushing using duplex channel ball-and-seat as claimed in claim 7, its feature
It is, described valve ball（4）With diameter greater than horizontal backward channel two（5b）Diameter, and valve ball（4）It is located at reverse near level
Passage two（5b）One end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633675.XA CN104453754B (en) | 2014-11-12 | 2014-11-12 | Bidirectional channel check valve and method for washing sand and well by using bidirectional channel check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633675.XA CN104453754B (en) | 2014-11-12 | 2014-11-12 | Bidirectional channel check valve and method for washing sand and well by using bidirectional channel check valve |
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| CN104453754B true CN104453754B (en) | 2017-02-15 |
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| CN104929574B (en) * | 2015-04-01 | 2017-05-10 | 中国石油集团渤海钻探工程有限公司 | Dual-channel different-direction joint-control check valve |
| CN109209295B (en) * | 2018-11-02 | 2023-11-24 | 天津诚泽畅石油技术有限公司 | Underground production and backwashing dual-function valve |
| CN111878034B (en) * | 2020-07-24 | 2023-12-12 | 邵立坤 | Uniflow valve for downhole tool |
| CN112483038B (en) * | 2020-11-16 | 2022-08-12 | 东营百华石油技术开发有限公司 | Washable well slip supporting packer and method |
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| CN101144375A (en) * | 2007-10-17 | 2008-03-19 | 大庆油田有限责任公司 | Horizontal well continuous sand flushing device |
| CN102465675A (en) * | 2010-11-16 | 2012-05-23 | 王志荣 | Sand wash valve |
| US8215407B2 (en) * | 2009-07-22 | 2012-07-10 | Baker Hughes Incorporated | Apparatus for fluidizing formation fines settling in production well |
| CN203129997U (en) * | 2013-01-04 | 2013-08-14 | 米振红 | Anti-backflow sand-washing check valve |
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| CN101144375A (en) * | 2007-10-17 | 2008-03-19 | 大庆油田有限责任公司 | Horizontal well continuous sand flushing device |
| US8215407B2 (en) * | 2009-07-22 | 2012-07-10 | Baker Hughes Incorporated | Apparatus for fluidizing formation fines settling in production well |
| CN102465675A (en) * | 2010-11-16 | 2012-05-23 | 王志荣 | Sand wash valve |
| CN203129997U (en) * | 2013-01-04 | 2013-08-14 | 米振红 | Anti-backflow sand-washing check valve |
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