CN104453754A - Two-way passageway check valve and method for conducting sand-flushing through the same - Google Patents
Two-way passageway check valve and method for conducting sand-flushing through the same Download PDFInfo
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- CN104453754A CN104453754A CN201410633675.XA CN201410633675A CN104453754A CN 104453754 A CN104453754 A CN 104453754A CN 201410633675 A CN201410633675 A CN 201410633675A CN 104453754 A CN104453754 A CN 104453754A
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 111
- 239000000725 suspension Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 58
- 238000005406 washing Methods 0.000 claims description 56
- 239000006185 dispersion Substances 0.000 claims description 16
- 238000007596 consolidation process Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 18
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 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
- 238000003756 stirring Methods 0.000 description 1
Classifications
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- 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 passageway check valve and a method for conducting sand-flushing through the two-way passageway check valve. The two-way passageway check valve is connected between a rotating jetting sand flushing device and an oil pipe. An upper connector used for being connected with the rotating jetting sand flushing device is arranged at the upper end of the two-way passageway check valve, and a lower connector used for being connected with the oil pipe is arranged at the lower end of the two-way passageway check valve. A diversion passageway is arranged in the upper connector. A forward passageway is arranged at the inner upper end of the lower connector, and a reverse passageway is arranged in the inner lower end of the lower connector. A valve ball and a spring are arranged in the reverse passageway. Compared with an existing liquid backflow passageway oil sleeve annulus, the passageway section is obviously narrowed, the liquid backflow speed is obviously increased, the liquid backflow speed is effectively increased under the condition of the same delivery capacity, the shaft sand grain suspension and backflow of a horizontal well section are facilitated, and the horizontal wall sand flushing effect is improved.
Description
Technical field
The invention belongs to a kind of method relating to duplex channel ball-and-seat and utilize this duplex channel ball-and-seat sand-flushing.
Background technology
Current horizontal well sand washing technology mainly contains continuous sand flushing technology and discontinuous sand washing technology two kinds.
What continuous sand flushing technology was representative is mainly coiled tubing continuous sand flushing technology, plain tubing down-hole commutation continuous sand flushing technology, concentric tube continuous sand flushing technology;
Coiled tubing sand washing technology sand washing efficiency is high, tubular column structure is simple, easy to operate, but cost is high, fashionablely under, long horizontal sections horizontal well tubing string complicated for well track easily causes bending even locked, backfin, and on-the-spot application is limited;
Plain tubing down-hole commutation continuous sand flushing technology mainly relies on supporting inverse well-flushing valve, down-hole fluid flow steering gear realizes continuous sand flushing, when the sand section of burying is longer, need supporting multiple flushing valve instrument (well head often connects an oil pipe needs connection flushing valve), flushing valve, the sealing of steering gear is crucial, when any one instrument is poorly sealed, during leakage, capital causes whole sand-flushing process pipe string " short circuit ", sand-flushing lost efficacy, fluid diversion cup packer is when deep-well is applied simultaneously, easy generation is damaged, cause this technology effect of field application desirable not to the utmost,
Concentric tube continuous sand flushing technology mainly relies on configure dedicated concentric oil tubes to set up independent reverse circulation passage, turned to by wellhead liquid flow and realize continuous sand flushing well-flushing, the main weak point of this technique needs the special concentric oil tubes of configuration processing, the horizontal well comparatively large for well depth, horizontal segment is longer, applies limited.
What horizontal well discontinuous sand-flushing technology was representative is oblique sharp sand washing technology, rotating jet sand washing machine direct circulation sand-flushing technology.
Oblique sharp sand washing technology due to shaft bottom impact force little, for the pit shaft sand washing that the horizontal segment oil-sand degree of consolidation is higher, effect is poor;
In order to increase the impact force of net horizontal section sand washing machine to long-pending sand, abundant stirring, the long-pending sand of suspension, the application of rotary jet device direct circulation sand-flushing technology scene is relatively general, but this technology is owing to cannot carry out reacting cycle well-flushing simultaneously, during the operation of direct circulation sand-flushing, the row's of returning channel cross-section is comparatively large, high to the row's of returning displacement requirements.
Summary of the invention
The object of the invention is to solve existing rotary jet device direct circulation sand-flushing method and cannot carry out reacting cycle well-flushing, and during the operation of direct circulation sand-flushing, the row's of returning channel cross-section is comparatively large, what cause 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 between rotating jet sand washing machine and oil pipe, and 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, and lower end is provided with the lower contact for being connected with oil pipe;
Flow-guiding channel is provided with vertically in described top connection;
The backward channel being provided with forward channel in described lower contact and be arrangeding in parallel with forward channel;
Be provided with spring and valve ball in described backward channel, valve ball is arranged on the one end near top connection, and spring is arranged on the left side of valve ball.
Described forward channel comprises horizontal forward channel and oblique forward channel, and horizontal forward channel is communicated with oblique forward channel, and oblique forward channel is communicated with flow-guiding channel.
Described backward channel comprises horizontal backward channel and oblique backward channel, and horizontal backward channel is communicated with oblique backward channel, and oblique backward channel is downward-sloping.
Described valve ball and spring is all located in horizontal backward channel.
The horizontal backward channel two that described horizontal backward channel comprises horizontal backward channel one and is communicated with this horizontal backward channel one, described horizontal backward channel two is communicated with oblique backward channel.
Described valve ball and spring is all located in horizontal backward channel one.
The diameter of described horizontal backward channel one is greater than the diameter of horizontal backward channel two.
The diameter of described valve ball is greater than the diameter of horizontal backward channel two, and valve ball is located at the one end near horizontal backward channel two.
Utilize this duplex channel ball-and-seat to realize a method for horizontal well sand washing well-flushing, comprise the steps:
1) duplex channel ball-and-seat is installed: the top connection of duplex channel ball-and-seat is connected with rotating jet sand washing machine by screw thread, and 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 by oil pipe, valve ball is closed, flushing fluid flows into flow-guiding channel by forward channel, enters rotating jet sand washing machine, and flushing fluid driven rotary jet flow sand washing machine forms rotating jet and pressure vibration at net horizontal section, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and makes the abundant dispersion suspension of long-pending sand, stops direct flushing;
2b) sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section is in step 2a) in by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter horizontal backward channel two from oblique backward channel, valve ball is under the thrust returning discharge opeing, be separated with horizontal backward channel two, spring contraction, returns discharge opeing and enters horizontal backward channel one, flows into oil pipe.
2c) flushing fluid or return discharge opeing and return out ground, horizontal well sand washing clean-out service completes.
Beneficial effect of the present invention: on horizontal well rotating jet direct circulation sand-flushing Process ba-sis, the present invention achieves rotating jet square impact backwash sand-flushing new method by the supporting duplex channel ball-and-seat of design rotating jet sand washing machine; It is oil pipe that new method returns apocenosis passage, apocenosis passage oil jacket annular space is returned relative to existing, its channel cross-section obviously diminishes, return drainage speed also to significantly improve, under same displacement condition, return effective raising of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
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; 2, lower contact; 3, spring; 4, valve ball; 5, backward channel; 501, horizontal backward channel; 5a, horizontal backward channel one; 5b, horizontal backward channel two; 502, oblique backward channel; 6, forward channel; 601, horizontal forward channel; 602, oblique forward channel; 7, flow-guiding channel; 8, duplex channel ball-and-seat; 9, oil pipe; 10, rotating jet sand washing machine.
Detailed description of the invention
The invention provides a kind of duplex channel ball-and-seat, as shown in Figure 2, this duplex channel ball-and-seat is connected between rotating jet sand washing machine 10 and oil pipe 9, and concrete structure and the application mode of this duplex channel ball-and-seat are described in detail below in conjunction with accompanying drawing.
As shown in Figure 1 (direction of the following stated is and states with reference to accompanying drawing 1), the upper end of this duplex channel ball-and-seat 8 is provided with the top connection 1 for being connected with rotating jet sand washing machine 10, lower end is provided with the lower contact 2 for being connected with oil pipe 9, be provided with flow-guiding channel 7 in top connection 1, in described top connection 1, be provided with flow-guiding channel 7 vertically, the backward channel 5 being provided with forward channel 6 in described lower contact 2 and be arrangeding in parallel with forward channel 6, spring 3 and valve ball 4 is provided with in backward channel 5, valve ball 4 is arranged on the one end near top connection 1, spring 3 is arranged on the left side of valve ball 4, described flow-guiding channel 7 level is located in top connection 1, and one end of this flow-guiding channel 7 extends into lower contact 2, forward channel 6 comprises again horizontal forward channel 601 and oblique forward channel 602, horizontal forward channel 601 is communicated with oblique forward channel 602, and oblique forward channel 602 is communicated with flow-guiding channel 7, and backward channel 5 comprises horizontal backward channel 501 and oblique backward channel 502, horizontal backward channel 501 is communicated with oblique backward channel 502, and oblique backward channel 502 is downward-sloping.
Further, valve ball 4 and spring 3 are all located in horizontal backward channel 501, and horizontal backward channel two 5b that horizontal backward channel 501 comprises horizontal backward channel one 5a and is communicated with this horizontal backward channel one 5a, described horizontal backward channel two 5b is communicated with oblique backward channel 502.Described valve ball 4 and spring 3 are all located in horizontal backward channel one 5a, and the diameter of horizontal backward channel one 5a is greater than the diameter of horizontal backward channel two 5b.The diameter of valve ball 4 is greater than the diameter of horizontal backward channel two 5b, 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 the top connection 1 for being connected with rotating jet sand washing machine 10, lower end is provided with the lower contact 2 for being connected with oil pipe 9, flow-guiding channel 7 is provided with in top connection 1, be provided with in described lower contact 2 forward channel 6 and with the backward channel 5 that forward channel 6 be arranged in parallel, be provided with valve ball 4 and spring 3 in backward channel 5.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, spring 3 is compressed, and then spring 3 contacts tightr with valve ball 4, gap is between the two less, valve ball 4 is closed, flushing fluid flows into flow-guiding channel 7 by forward channel 6, enters rotating jet sand washing machine 10, and flushing fluid driven rotary jet flow sand washing machine 10 forms rotating jet and pressure vibration at net horizontal section, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and makes the abundant dispersion suspension of long-pending sand, stops direct flushing; Sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section in direct flushing by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter backward channel 5, 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 relative to existing, its channel cross-section obviously diminishes, and returns drainage speed and also significantly improves, and under same displacement condition, returns effective raising of drainage speed, contributes to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
embodiment 2
On the basis of embodiment 1, further, as shown in Figure 1, described forward channel 6 comprises horizontal forward channel 601 and oblique forward channel 602, and horizontal forward channel 601 is communicated with oblique forward channel 602, and oblique forward channel 602 is communicated with flow-guiding channel 7.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, spring 3 is compressed, and then spring 3 contacts tightr with valve ball 4, gap is between the two less, valve ball 4 is closed, first flushing fluid enters the horizontal forward channel 601 in forward channel 6, enter oblique forward channel 602 again, due to the inclination of oblique forward channel 602, under gravity, flushing fluid flows into flow-guiding channel 7, enter rotating jet sand washing machine 10, flushing fluid driven rotary jet flow sand washing machine 10 forms rotating jet and pressure vibration at net horizontal section, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and make the abundant dispersion suspension of long-pending sand, stop direct flushing, sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section in direct flushing by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter backward channel 5, 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 relative to existing, its channel cross-section obviously diminishes, and returns drainage speed and also significantly improves, and under same displacement condition, returns effective raising of drainage speed, contributes to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
embodiment 3
On the basis of embodiment 1, backward channel 5 comprises again horizontal backward channel 501 and oblique backward channel 502, and horizontal backward channel 501 is communicated 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, spring 3 is compressed, and then spring 3 contacts tightr with valve ball 4, gap is between the two less, valve ball 4 is closed, and flushing fluid enters forward channel 6, then enters flow-guiding channel 7, enter rotating jet sand washing machine 10, flushing fluid driven rotary jet flow sand washing machine 10 forms rotating jet and pressure vibration at net horizontal section, and under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and make the abundant dispersion suspension of long-pending sand, stop direct flushing; Sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section in direct flushing by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter oblique backward channel 502 in backward channel 5, then enter horizontal backward channel 501, valve ball 4 is under the thrust returning discharge opeing, press to spring 3, spring 3 shrinks, and returns discharge opeing and flows 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 relative to existing, its channel cross-section obviously diminishes, and returns drainage speed and also significantly improves, and under same displacement condition, returns effective raising of drainage speed, contributes to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
embodiment 4
On the basis of embodiment 3, further, valve ball 4 and spring 3 are all located 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, spring 3 is compressed, and then spring 3 contacts tightr with valve ball 4, gap is between the two less, valve ball 4 is closed, and flushing fluid enters forward channel 6, then enters flow-guiding channel 7, enter rotating jet sand washing machine 10, flushing fluid driven rotary jet flow sand washing machine 10 forms rotating jet and pressure vibration at net horizontal section, and under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and make the abundant dispersion suspension of long-pending sand, stop direct flushing; Sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section in direct flushing by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter oblique backward channel 502 in backward channel 5, enter horizontal backward channel 501 again, because valve ball 4 and spring 3 are all located in horizontal backward channel 501, therefore valve ball 4 is 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, horizontal well sand washing clean-out service completes.
Return apocenosis passage oil jacket annular space relative to existing, its channel cross-section obviously diminishes, and returns drainage speed and also significantly improves, and under same displacement condition, returns effective raising of drainage speed, contributes to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
embodiment 5
On the basis of embodiment 3, horizontal backward channel two 5b that horizontal backward channel 501 comprises again horizontal backward channel one 5a and is communicated with this horizontal backward channel one 5a, described horizontal backward channel two 5b is communicated with oblique backward channel 502.Described valve ball 4 and spring 3 are all located in horizontal backward channel one 5a, and the diameter of horizontal backward channel one 5a is greater than the diameter of horizontal backward channel two 5b.The diameter of valve ball 4 is greater than the diameter of horizontal backward channel two 5b, and valve ball 4 is located at the one end near horizontal backward channel two 5b.
During direct flushing, flushing fluid enters forward channel 6 by oil pipe 9, due to the thrust of flushing fluid, spring 3 is compressed, and then spring 3 contacts tightr with valve ball 4, gap is between the two less, valve ball 4 is closed, first flushing fluid enters the horizontal forward channel 601 in forward channel 6, enter oblique forward channel 602 again, due to the inclination of oblique forward channel 602, under gravity, flushing fluid flows into flow-guiding channel 7, enter rotating jet sand washing machine 10, flushing fluid driven rotary jet flow sand washing machine 10 forms rotating jet and pressure vibration at net horizontal section, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and make the abundant dispersion suspension of long-pending sand, stop direct flushing, sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section in direct flushing by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter oblique backward channel 502 in backward channel 5, enter horizontal backward channel two 5b in horizontal backward channel 501 again, because valve ball 4 and spring 3 are all located in horizontal backward channel one 5a, and the diameter of horizontal backward channel one 5a is greater than the diameter of horizontal backward channel two 5b, in addition, the diameter of valve ball 4 is greater than the diameter of horizontal backward channel two 5b, therefore valve ball 4 is 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, horizontal well sand washing clean-out service completes.
Return apocenosis passage oil jacket annular space relative to existing, its channel cross-section obviously diminishes, and returns drainage speed and also significantly improves, and under same displacement condition, returns effective raising of drainage speed, contributes to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
embodiment 6
Utilize this duplex channel ball-and-seat to realize a method for horizontal well sand washing well-flushing, comprise the steps:
1) duplex channel ball-and-seat 8 is installed: the top connection 1 of duplex channel ball-and-seat 8 is connected with rotating jet sand washing machine 10 by screw thread, 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, due to the thrust of flushing fluid, spring 3 is compressed, and then spring 3 contacts tightr with valve ball 4, valve ball 4 is further made to contact tighter with horizontal backward channel two 5b, gap is between the two less, namely valve ball 4 is closed, flushing fluid flows into flow-guiding channel 7 by forward channel 6, enter rotating jet sand washing machine 10, flushing fluid driven rotary jet flow sand washing machine 10 forms rotating jet and pressure vibration at net horizontal section, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and make the abundant dispersion suspension of long-pending sand, stop direct flushing,
2b) sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section is in step 2a) in by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter horizontal backward channel two 5b from oblique backward channel 502, valve ball 4 is under the thrust returning discharge opeing, be separated with horizontal backward channel two 5b, spring 3 shrinks, and returns discharge opeing and enters horizontal backward channel 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 achieves rotating jet square impact backwash sand-flushing new method by the supporting duplex channel ball-and-seat of design rotating jet sand washing machine; It is oil pipe that new method returns apocenosis passage, apocenosis passage oil jacket annular space is returned relative to existing, its channel cross-section obviously diminishes, return drainage speed also to significantly improve, under same displacement condition, return effective raising of drainage speed, contribute to net horizontal section pit shaft sand suspension, the row of returning, well sand washing effect of improving the standard.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (9)
1. a duplex channel ball-and-seat, it is characterized in that, this duplex channel ball-and-seat (8) is connected between rotating jet sand washing machine (10) and oil pipe (9), the upper end of described duplex channel ball-and-seat (8) 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);
Flow-guiding channel (7) is provided with vertically in described top connection (1);
The backward channel (5) being provided with forward channel (6) in described lower contact (2) and be arrangeding in parallel with forward channel (6), and forward channel (6) communicates with flow-guiding channel (7);
Be provided with spring (3) and valve ball (4) in described backward channel (5), valve ball (4) is arranged on the one end near top connection (1), and spring (3) is arranged on the left side of valve ball (4).
2. a kind of duplex channel ball-and-seat as claimed in claim 1, it is characterized in that, described forward channel (6) comprises horizontal forward channel (601) and oblique forward channel (602), horizontal forward channel (601) is communicated with oblique forward channel (602), and oblique forward channel (602) is communicated with flow-guiding channel (7).
3. a kind of duplex channel ball-and-seat as claimed in claim 1, it is characterized in that, described backward channel (5) comprises horizontal backward channel (501) and oblique backward channel (502), horizontal backward channel (501) is communicated with oblique backward channel (502), and oblique backward channel (502) is downward-sloping.
4. a kind of duplex channel ball-and-seat as claimed in claim 3, is characterized in that, described valve ball (4) and spring (3) are all located in horizontal backward channel (501).
5. a kind of duplex channel ball-and-seat as claimed in claim 3, it is characterized in that, the horizontal backward channel two (5b) that described horizontal backward channel (501) comprises horizontal backward channel one (5a) and is communicated with this horizontal backward channel one (5a), described horizontal backward channel two (5b) is communicated with oblique backward channel (502).
6. a kind of duplex channel ball-and-seat as claimed in claim 5, is characterized in that, described valve ball (4) and spring (3) are all located in horizontal backward channel one (5a).
7. as a kind of duplex channel ball-and-seat that claim 5 is stated, it is characterized in that, the diameter of described horizontal backward channel one (5a) is greater than the diameter of horizontal backward channel two (5b).
8. a kind of duplex channel ball-and-seat as claimed in claim 6, is characterized in that, the diameter of described valve ball (4) is greater than the diameter of horizontal backward channel two (5b), and valve ball (4) is located at the one end near horizontal backward channel two (5b).
9. utilize this duplex channel ball-and-seat to realize a method for horizontal well sand washing well-flushing, it is characterized in that, comprise the steps:
Duplex channel ball-and-seat (8) is installed: the top connection (1) of duplex channel ball-and-seat (8) is connected with rotating jet sand washing machine (10) by screw thread, and lower contact (2) is connected with oil pipe (9) by screw thread;
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), valve ball (4) is closed, flushing fluid flows into flow-guiding channel (7) by forward channel (6), enter rotating jet sand washing machine (10), flushing fluid driven rotary jet flow sand washing machine (10) forms rotating jet and pressure vibration at net horizontal section, under the impact of flushing fluid is stirred, the consolidation of net horizontal section is amassed sand and is destroyed, and make the abundant dispersion suspension of long-pending sand, stop direct flushing;
2b) sand-flushing pendular ring sky is pumped into sleeve pipe, carry out reacting cycle well-flushing: flushing fluid agitate water horizontal well section is in step 2a) in by the sand grains of dispersion suspension, return discharge opeing to carry sand grains and enter horizontal backward channel two (5b) from oblique backward channel (502), valve ball (4) is under the thrust returning discharge opeing, be separated with horizontal backward channel two (5b), spring (3) shrinks, and returns discharge opeing and enters horizontal backward channel 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633675.XA CN104453754B (en) | 2014-11-12 | 2014-11-12 | Two-way passageway check valve and method for conducting sand-flushing through the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633675.XA CN104453754B (en) | 2014-11-12 | 2014-11-12 | Two-way passageway check valve and method for conducting sand-flushing through the same |
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| Publication Number | Publication Date |
|---|---|
| CN104453754A true CN104453754A (en) | 2015-03-25 |
| CN104453754B CN104453754B (en) | 2017-02-15 |
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| CN201410633675.XA Active CN104453754B (en) | 2014-11-12 | 2014-11-12 | Two-way passageway check valve and method for conducting sand-flushing through the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929574A (en) * | 2015-04-01 | 2015-09-23 | 中国石油集团渤海钻探工程有限公司 | Dual-channel different-direction joint-control check valve |
| CN109209295A (en) * | 2018-11-02 | 2019-01-15 | 天津诚泽畅石油技术有限公司 | Downhole production and backwash dual function valve |
| CN111878034A (en) * | 2020-07-24 | 2020-11-03 | 邵立坤 | Check valve for downhole tool |
| WO2022099725A1 (en) * | 2020-11-16 | 2022-05-19 | 东营百华石油技术开发有限公司 | Slip supported spacer of washable oil well and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929574A (en) * | 2015-04-01 | 2015-09-23 | 中国石油集团渤海钻探工程有限公司 | Dual-channel different-direction joint-control check valve |
| 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 |
| CN109209295A (en) * | 2018-11-02 | 2019-01-15 | 天津诚泽畅石油技术有限公司 | Downhole production and backwash dual function 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 |
| CN111878034A (en) * | 2020-07-24 | 2020-11-03 | 邵立坤 | Check valve for downhole tool |
| CN111878034B (en) * | 2020-07-24 | 2023-12-12 | 邵立坤 | Uniflow valve for downhole tool |
| WO2022099725A1 (en) * | 2020-11-16 | 2022-05-19 | 东营百华石油技术开发有限公司 | Slip supported spacer of washable oil well and method |
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| CN104453754B (en) | 2017-02-15 |
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