CN206458408U - Backwash valve capable of backwashing, blocking removal and sand prevention - Google Patents
Backwash valve capable of backwashing, blocking removal and sand prevention Download PDFInfo
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- CN206458408U CN206458408U CN201621453215.XU CN201621453215U CN206458408U CN 206458408 U CN206458408 U CN 206458408U CN 201621453215 U CN201621453215 U CN 201621453215U CN 206458408 U CN206458408 U CN 206458408U
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- 238000011001 backwashing Methods 0.000 title abstract 3
- 230000000903 blocking effect Effects 0.000 title description 8
- 230000002265 prevention Effects 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 64
- 239000012530 fluid Substances 0.000 claims description 91
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- 239000000203 mixture Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 33
- 238000005086 pumping Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 37
- 239000003129 oil well Substances 0.000 description 26
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Abstract
The utility model provides a but backwash unblock backwash valve of stifled sand control belongs to oil recovery technology technical field, and this backwash valve of stifled sand control is separated to backwashing includes the valve body, is equipped with main liquid flow channel and bypass liquid flow channel in the valve body, and main liquid flow channel link up from top to bottom, is equipped with only to allow liquid by the single current valve core subassembly of supreme passing through down in main liquid flow channel, and bypass liquid flow channel has inlet and liquid outlet, the inlet with the liquid outlet all is linked together with main liquid flow channel, and the inlet is located the top of single current valve core subassembly, and the liquid outlet is located the below of single current valve core subassembly, and inlet department is equipped with the switching element of control inlet and main liquid flow. The backwash valve capable of backwashing, plug removing and sand preventing is installed on a production completion pipe string of an oil pumping well, can cut off liquid circulation, allow liquid to upwards circulate and allow liquid to downwards circulate according to different requirements of oil field production, and can backwash and plug removing on the pipe string under the condition that the pipe string is not lifted, and production is recovered.
Description
Technical field
The utility model belongs to DP technology technical field, more particularly on rod-pumped well productive completion tubing string
A kind of backwash valve of back-washable de-plugging sand control.
Background technology
In oil extraction process, formation there are problems that shaking out.For the rod-pumped well shaked out, if do not taken
Effective sand control measure, easily causes the stratum sand that collapses and buries, the accident such as oil well pump blocking, holddown, abrasion has had a strong impact on oil well
Normal production.
Existing sand-preventing process mainly has chemical sand control and mechanical sand control, and wherein mechanical sand control is the conventional sand control side in oil field
Method, mechanical sand control is primarily referred to as screen sand control, and common screen sand control method has sand screen, wire-wrapped screen, cutting seam sieve tube, pipe outer
Gravel pack screen casing, expandable screen pipe etc..Screen sand control technique is excellent because construction is simple, operating cost is low, sand controlling result is good etc.
Point, using very universal in rod-pumped well.
At present, rod-pumped well screen sand control mainly has two ways：One kind is to be hung in oil layer section using hanging packer
Sand control screen；Another is directly to connect sand control screen in oil well pump arrival end.There is production in both screen sand control modes
The phenomenon that completion tubular column is blocked, especially in the oil well that formation particle sorting is poor, shale content is high, gum asphaltic content is high
In, clogging is very universal.
Rod-pumped well productive completion tubing string blocks main screen casing blocking, oil well pump and blocked and oil pipe blocking.Productive completion
After tubing string is blocked, oil well output can be caused to decline to a great extent, the sand control life shortens.It is raw in the high oil well of the shale content that shakes out
Production completion tubular column blockage problem has turned into restricts the great difficult problem that such oil well is normally produced.
Rod-pumped well productive completion tubing string generally requires carry out workover after blocking, and rises to produce completion tubular column, cleaning,
After de-plugging, then tripping in productive completion tubing string is produced again, is substantially increased operating cost, is extended and more increase duty cycle
Construction risk is added.
Therefore, research realizes the backwash de-plugging of productive completion tubing string how in the case where not playing out production completion tubular column
Tool is of great significance.And this backwash solution plugging function is realized, it is necessary to using special backwash valve.Do not have in the prior art
There is the backwash valve that can realize the function.
In consideration of it, the present inventor is according to the production design experiences for being engaged in this area and association area for many years, developing is used for
The backwash valve of a kind of back-washable de-plugging sand control of rod-pumped well productive completion tubing string, to solve the problem of prior art is present.
Utility model content
The purpose of this utility model is to provide a kind of backwash valve of back-washable de-plugging sand control, has been produced installed in rod-pumped well
On well casing post, the different needs that can be produced by Oil Field realize cut-off liquid communication, allow liquid to circulate and allow upwards
Liquid circulates downwards, can realize and carry out backwash de-plugging to tubing string in the case of not lift pipe string, resume production.
To reach above-mentioned purpose, the utility model proposes a kind of backwash valve of back-washable de-plugging sand control, including valve body, its
In, provided with main fluid course and bypass fluid course, the main fluid course up/down perforation, in the main liquid stream in the valve body
Provided with the single current core assembly for only allowing liquid to pass through from the bottom to top in passage, the bypass fluid course has inlet and gone out
Liquid mouthful, the inlet and the liquid outlet are connected with the main fluid course, and the inlet is located at the ball-and-seat
The top of core assembly, the liquid outlet, which is located at the lower section of the single current core assembly, the inlet, to be provided with described in control
The switch element that liquid mouthful is connected and separated with the main fluid course.
The backwash valve of back-washable de-plugging sand control as described above, wherein, the valve body includes the inner tube being vertically arranged and outer
Pipe, said inner tube is the tubular body of up/down perforation, and the tube wall of said inner tube encloses the main fluid course, and the outer tube is in cylinder
Shape is simultaneously set in outside said inner tube, and the outer wall of the top and bottom of the outer tube with said inner tube is tightly connected, the outer tube
There is annular space between said inner tube, the inlet and the liquid outlet are opened on the tube wall of said inner tube and connected
Lead to the main fluid course and the annular space, the inlet, the annular space and the liquid outlet constitute the side
Road fluid course.
The backwash valve of back-washable de-plugging sand control as described above, wherein, a diameter of 88.9mm of said inner tube, the outer tube
A diameter of 114.3mm.
The backwash valve of back-washable de-plugging sand control as described above, wherein, the switch element includes spring and tubular
Sliding sleeve, the sliding sleeve is set in said inner tube and is slidably matched with said inner tube sealing, passes through moving up and down for the sliding sleeve
UNICOM and the cut-off of the inlet and the main fluid course are controlled, the inwall of said inner tube is provided with along the footpath of said inner tube
To the limited step of protrusion, the limited step is located at the lower section of the sliding sleeve, and one end contact of the spring is described spacing
On step, the other end contact of the spring is on the sliding sleeve；Platform of the inwall of the sliding sleeve bottom provided with a circle protrusion
It is stepped into valve ball seat, the valve ball seat is provided with the valve ball of corresponding cooperation, the valve ball seat and the valve
Ball constitutes the single current core assembly.
The backwash valve of back-washable de-plugging sand control as described above, wherein, valve ball seat contact with the valve ball
Face is the arc surface of indent.
The backwash valve of back-washable de-plugging sand control as described above, wherein, set between the sliding sleeve and the tube wall of said inner tube
It is equipped with sealing ring.
The backwash valve of back-washable de-plugging sand control as described above, wherein, two are provided between the sliding sleeve and said inner tube
The sealing ring, after the sliding sleeve closes the inlet, two sealing rings are located at the top of the inlet respectively
And lower section.
The backwash valve of back-washable de-plugging sand control as described above, wherein, offered on the tube wall of said inner tube multiple described
Inlet opening and multiple fluid holes, multiple inlet openings are uniform along the circumference of said inner tube.
The backwash valve of back-washable de-plugging sand control as described above, wherein, the top of the valve body is provided with top connection, the valve
The bottom of body is provided with lower contact, and the main fluid course runs through the top connection and the lower contact.
The backwash valve of back-washable de-plugging sand control as described above, wherein, the top connection offers internal thread, it is described under connect
Head offers external screw thread.
Compared with prior art, the utility model has the characteristics that and advantage：
The utility model proposes back-washable de-plugging sand control backwash valve, on rod-pumped well productive completion tubing string,
During production, crude oil can be flowed up by the backwash valve of the back-washable de-plugging sand control, meet rod-pumped well productive completion tubing string
Positive production oil pumping production need.When needing to carry out backwash de-plugging to rod-pumped well productive completion tubing string, without by oil pumper
Well productive completion tubing string rises, and only backwash blockages relieving fluid need to be injected into sleeve pipe according to some cycles；When the pressure of backwash blockages relieving fluid
When relatively low, backwash blockages relieving fluid is stopped and can only be flowed up by the backwash valve of back-washable de-plugging sand control, and then is pointed to back-washable
Oil well pump and oil pipe above the backwash valve of de-plugging sand control are rinsed de-plugging；When the pressure of backwash blockages relieving fluid rises to a fixed number
After value, backwash blockages relieving fluid can just wash the backwash valve of back-washable de-plugging sand control open downwards, and then be pointed to back-washable de-plugging sand control
Anti- sand-catching apparatus below backwash valve is rinsed de-plugging.So, without acting rod-pumped well productive completion tubing string, you can right
The rod-pumped well productive completion tubing string carries out backwash de-plugging operation, is normally produced so as to Quick-return, work of not only constructing
Skill is simple, little impact on production, also greatly reduces operating cost, shortens duty cycle and reduces construction risk.
Brief description of the drawings
Accompanying drawing described here is only used for task of explanation, and is not intended in any way limit disclosed in the utility model
Scope.In addition, shape and proportional sizes of each part in figure etc. are only schematical, it is used to help to reason of the present utility model
Solution, is not the specific shape and proportional sizes for limiting each part of the utility model.Those skilled in the art is new in this practicality
Under the teaching of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.
Fig. 1 be the utility model proposes back-washable de-plugging sand control backwash valve structural representation；
Fig. 2 for the back-washable de-plugging sand control of the utility model backwash valve in valve body structural representation；
Fig. 3 for the back-washable de-plugging sand control of the utility model backwash valve in sliding sleeve structural representation；
Fig. 4 is real installed on rod-pumped well productive completion tubing string one for the backwash valve of the back-washable de-plugging sand control of the utility model
Apply the structural representation of example；
Fig. 5 is arranged on another on rod-pumped well productive completion tubing string for the backwash valve of the back-washable de-plugging sand control of the utility model
The structural representation of embodiment；
Fig. 6 is the structural representation of anti-desilting device；
Fig. 7 is the schematic diagram of the backwash valve oil recovery process of the back-washable de-plugging sand control of the utility model；
Fig. 8 is the schematic diagram of the backwash valve backwash de-plugging process of the back-washable de-plugging sand control of the utility model.
Description of reference numerals：
100 rod-pumped well productive completion tubing strings；10 one-level sand control screens；
20 suspension sealers；30 anti-sand-catching apparatus；
31 sand sediment pipes；311 sand setting chambers；
312 feed pathways；32 2 grades of sand control screens；
321 flowing holes；40 packers；
The backwash valve of 50 back-washable de-plugging sand controls；51 valve bodies；
511 inner tubes；512 outer tubes；
513 limited steps；514 top connections；
52 main fluid courses；53 bypass fluid courses；
531 inlets；532 liquid outlets；
533 annular spaces；54 single current core assemblies；
541 valve ball seats；542 valve balls；
55 switch elements；551 springs；
552 sliding sleeves；553 sealing rings；
60 perforated pipes；61 eyelets；
70 oil well pumps；80 oil pipes；
201 sleeve pipes；202 sleeve valves；
203 production valves；204 oil layer sections.
Embodiment
With reference to the description of accompanying drawing and the utility model embodiment, can clearly it understand of the present utility model
Details.But, embodiment of the present utility model described here is only used for explaining the purpose of this utility model, without
It can be understood as being to limitation of the present utility model in any way.Under teaching of the present utility model, technical staff is contemplated that
Based on any possible deformation of the present utility model, these are regarded as belonging to scope of the present utility model.
Refer to Fig. 1, Fig. 2 and Fig. 3, wherein, Fig. 1 be the utility model proposes back-washable de-plugging sand control backwash valve
Structural representation；Fig. 2 for the back-washable de-plugging sand control of the utility model backwash valve in valve body structural representation；Fig. 3 is this reality
With the structural representation of sliding sleeve in the backwash valve of new back-washable de-plugging sand control.As shown in Figure 1 to Figure 3, the utility model proposes
The backwash valve 50 of back-washable de-plugging sand control include valve body 51, provided with main fluid course 52 and bypass fluid course in valve body 51
53, the main up/down perforation of fluid course 52, provided with the single current valve element for only allowing liquid to pass through from the bottom to top in main fluid course 52
Component 54, bypass fluid course 53 has inlet 531 and a liquid outlet 532, inlet 531 and liquid outlet 532 with main liquid stream
Passage 52 is connected, and inlet 531 is located at the top of single current core assembly 54, and liquid outlet 532 is located at single current core assembly 54
The switch element 55 for setting control inlet 531 to connect and separate with main fluid course 52 at lower section, inlet 531.
Fig. 4 is refer to simultaneously, and Fig. 4 is to be arranged on rod-pumped well the utility model proposes the backwash valve of back-washable de-plugging sand control
The structural representation of an embodiment on productive completion tubing string, as shown in figure 4, the utility model proposes back-washable de-plugging sand control
Backwash valve 50 be arranged on rod-pumped well productive completion tubing string 100 on, the productive completion tubing string 100 is arranged on the set of rod-pumped well
In pipe 201, rod-pumped well productive completion tubing string 100 at least includes the anti-sand-catching apparatus 30 that order is set from the bottom to top, packer
40th, the backwash valve 50 of back-washable de-plugging sand control, perforated pipe 60, oil well pump 70 and oil pipe 80.
The utility model proposes the backwash valve 50 of back-washable de-plugging sand control single current valve element is set in main fluid course 52
Component 54, switch element 55 is provided with the inlet 531 of bypass fluid course 53.When switch element 55 closes inlet
When 531, bypass fluid course 53 is in cut-off state with main fluid course 52, and liquid can only be by single current core assembly 54 under
Pass through main fluid course 52 to Shangdi；Also, when liquid from top to bottom enters the backwash valve 50 of back-washable de-plugging sand control, liquid
Coverlet flow valve core component 54 obstructs and can not be by inverse well-flushing valve 50.When switch element 55 makes inlet 531 be in open mode
When, the inlet 531 and liquid outlet 532 and main fluid course for bypassing fluid course 53 are in connected state, so, when liquid by
It is up to lower to enter after the backwash valve 50 of back-washable de-plugging sand control, although to receive the barrier of single current core assembly 54, but liquid can
From top to bottom pass through via bypass fluid course 53.
The utility model proposes back-washable de-plugging sand control backwash valve 50 be arranged on rod-pumped well productive completion tubing string 100
On, when carrying out oil pumping production, crude oil enters inside tubing string through anti-sand-catching apparatus 30, the backwash then through back-washable de-plugging sand control
Main fluid course 52 in valve 50 enters oil well pump 70 and oil pipe, and ground is arrived in finally extraction.In process of production, the sand in crude oil
Grain, soil, colloid, asphalitine can gradually block anti-sand-catching apparatus 30, oil well pump 70 and oil pipe 80, cause the oil well underproduction.Now,
Need to carry out backwash de-plugging operation, dredging productive completion tubing string 100 resumes production.During backwash de-plugging, produced to rod-pumped well
In ring set space between completion tubular column 100 and sleeve pipe 201 inject backwash blockages relieving fluid, backwash blockages relieving fluid by perforated pipe 60 eyelet
61 enter inside rod-pumped well productive completion tubing string 100, and due to the barrier effect of single current core assembly 54, backwash blockages relieving fluid can only
Flowed to the top of productive completion tubing string, so as to be rinsed de-plugging to oil well pump 70 and oil pipe 80；Afterwards, switch element 55 dozens
Inlet 531 is opened, and then bypass fluid course 53 and main fluid course 52 is in connected state, backwash blockages relieving fluid is by bypass
Fluid course 53 is flowed and entered in anti-settling sand device 30 from top to bottom, and de-plugging is rinsed to anti-sand-catching apparatus 30.
From said process, the utility model proposes the backwash valve 50 of back-washable de-plugging sand control be arranged on rod-pumped well
On productive completion tubing string 100, it is not only able to carry out oil pumping production operation, rises without by tubing string when needing to rinse de-plugging,
Only need to inject backwash blockages relieving fluid from oil jacket annular space according to some cycles, you can to tubing string progress de-plugging, production back to normal, no
But construction technology is simple, little impact on production, also greatly reduces operating cost, shortens duty cycle and reduces construction wind
Danger.
Meanwhile, the utility model proposes back-washable de-plugging sand control backwash valve 50 and rod-pumped well productive completion tubing string
100 when carrying out backwash de-plugging, is not only able to be pointed to the He of oil well pump 70 of the top of backwash valve 50 of back-washable de-plugging sand control
Oil pipe 80 rinses de-plugging, moreover it is possible to which the anti-sand-catching apparatus 30 for being pointed to the lower section of backwash valve 50 of back-washable de-plugging sand control is rinsed solution
It is stifled, it is ensured that rod-pumped well productive completion tubing string 100 it is unimpeded, beneficial to the continuous production of rod-pumped well productive completion tubing string 100.
In addition, the utility model proposes back-washable de-plugging sand control backwash valve 50 it is simple in construction, processing and fabricating cost is low,
Beneficial to being widely popularized and apply.
In one optional example of the utility model, as shown in Figure 1 to Figure 3, the utility model proposes back-washable solution
The backwash valve 50 of stifled sand control, its valve body 51 includes inner tube 511 and the outer tube 512 being vertically arranged, inner tube 511 in a tubular form, main liquid stream
Passage 52 is the inner chamber of the up/down perforation of inner tube 511, and outer tube 512 is cylindrical in shape and is set in outside inner tube 511, the upper end of outer tube 512 and
Outer wall of the lower end with inner tube 511 is tightly connected, and has annular space 533, the He of inlet 531 between outer tube 512 and inner tube 511
Liquid outlet 531 is opened on the tube wall of inner tube 511 and connects main fluid course 52 and annular space 533, inlet 531,
Annular space 533 and the composition bypass fluid course 53 of liquid outlet 532.
In one optional example of the utility model, the diameter (external diameter) of outer tube 512 is 114.3mm, inner tube 511 it is straight
Footpath (external diameter) is 88.9mm.So, both can guarantee that the size of the backwash valve 50 of whole back-washable de-plugging sand control can easily pacify
On productive completion tubing string 100, moreover it is possible to ensure that the main fluid course 52 in the backwash valve 50 of back-washable de-plugging sand control has foot
Enough cross-sectional area ensures the flow of crude oil, the need for meeting normal oil pumping production, and back-washable de-plugging sand control backwash
Bypass fluid course in valve 50 has the flow of enough cross-sectional area guarantee backwash blockages relieving fluids, to ensure backwash de-plugging operation
The need for.
In one optional example of the utility model, as shown in Figure 1 to Figure 3, switch element 55 includes spring 551 and is in
The sliding sleeve 552 of tubular, sliding sleeve 552 is set in inner tube 511 and is slidably matched with the sealing of inner tube 511, by sliding sleeve about 552
Mobile control inlet 531 is connected and cut-off with main fluid course 52, and the inwall of inner tube 511 is provided with along the inner tube 511
The limited step 513 (alternatively referred to as spring base) of radially protruding, limited step 513 is located at the lower section of sliding sleeve 552, spring 551
One end contact is on limited step 513, and the other end contact of spring is on sliding sleeve 552, and the inwall of the bottom of sliding sleeve 552 is provided with one
The step formation valve ball seat 541 of circle protrusion, valve ball seat 541 is provided with the valve ball 542 of corresponding cooperation, valve ball seat
541 and the composition of valve ball 542 single current core assembly 54.
When liquid enters main fluid course 52 from bottom to top, liquid pushes up out anti-valve ball 542 from bottom to top, passes through main liquid
Circulation road 52 continues up flowing.
When liquid from top to bottom enters main fluid course 52, liquid can by valve ball 542 stop, if liquid
When pressure is in smaller range (now ground pump pressure is less than 10~15MPa), liquid can not be further continued for flowing downward, and can only transfer
Flowed to the top of antiflowback valve 50；If the pressure of liquid reach after certain numerical value scope (now ground pump pressure be more than 10~
15MPa), liquid will push down on valve ball 542, and valve ball 542 drives valve ball seat 541 and solid with the valve ball seat 541
The sliding sleeve 552 being located at together is moved down, so as to open inlet opening 531, bypass fluid course 53 is in connected state, liquid
The lower section of antiflowback valve 50 can be flowed down to from bypass fluid course 53.In actual production process, those skilled in the art
The need for can be according to actual production, required liquid be moved down by adjusting the elastic strength of spring 551, and then adjusting sliding sleeve 552
Body pressure value.
In an optional example, valve ball seat 541 is convexed into the bottom of sliding sleeve 552 so that the main fluid course of control
The switch element 55 that the single current core assembly 54 of 52 connections and cut-off is connected or separated with control bypass fluid course 53 is integrated into
One, simplifies the internal structure of the backwash valve 50 of back-washable de-plugging sand control, has saved the backwash valve 50 of back-washable de-plugging sand control
Inner space, it is ensured that there is enough spaces to meet the flow of liquid for the inside of backwash valve 50 of back-washable de-plugging sand control, together
When, because the simplification of structure also reduces the incidence of accident.
Meanwhile, sliding sleeve 552 and valve ball seat 541 is fixed is integrated so that the backwash valve 50 of back-washable de-plugging sand control can
Liquid is only capable of the backwash valve by back-washable de-plugging sand control when realizing unidirectional circulation upwards and unidirectional circulation downwards, i.e. oil pumping production
50 unidirectionally flow up, and liquid is only capable of unidirectionally flowing downward by the backwash valve 50 of back-washable de-plugging sand control during anti-flushing well, and then
Ensure oil pumping production and effective progress of backwash well operations.
In one optional example of the utility model, as shown in Figure 1 and Figure 2, valve ball seat 541 connects with valve ball 542
Contacting surface (sealing surface) is the arc surface of indent, and then when ensure that single current core assembly 54 is closed, main liquid is circulated
The barriering effect in road 52.
In one optional example of the utility model, as shown in Figure 2 and Figure 3, between the tube wall of sliding sleeve 552 and inner tube 511
Sealing ring 553 is provided with, to be further ensured that the sealing between sliding sleeve 552 and inner tube 511 is slidably matched.
In an optional example, as shown in Figure 2 and Figure 3, provided with two sealing rings between sliding sleeve 552 and inner tube 511
553, after sliding sleeve 552 closes inlet 531, two sealing rings 553 are located above and below inlet 531 respectively, so that
Ensure sealing effect of the sliding sleeve 552 to inlet 531.
In one optional example of the utility model, as shown in Figure 1 to Figure 3, offered on the tube wall of inner tube 511 multiple
Inlet opening 531 and multiple fluid holes 532, multiple inlet openings 531 are along the circumferential uniform of inner tube 511, so, when sliding sleeve 552 is moved
When, it is ensured that multiple inlet openings 531 are opened and closed simultaneously.Certainly, multiple fluid holes 532 can also be arranged to along inner tube
511 circumference is uniform.
In one optional example of the utility model, as shown in Figure 1 and Figure 2, the top of valve body 51 is provided with top connection 514,
The bottom of valve body 51 is provided with lower contact 515, and top connection 514 and lower contact 515 are used to and rod-pumped well productive completion tubing string 100
Other parts be connected, also, main fluid course 52 run through top connection 514 and lower contact 515.
In an optional example, as shown in Figure 1 and Figure 2, top connection 513 offers internal thread, and lower contact 514 is opened up
There is external screw thread.By common threaded connection the backwash valve 50 of back-washable de-plugging sand control is easily connected to existing
On productive completion tubing string, not only beneficial to back-washable de-plugging sand control backwash valve 50 installation, simplify execute-in-place process, improve
Production efficiency, has more saved cost.
In one optional example of the utility model, as shown in fig. 6, anti-settling in rod-pumped well productive completion tubing string 100
Sand device 30 includes sand sediment pipe 31 and two grades of sand control screens 32, and sand sediment pipe 31 is cylindrical in shape and with hollow sand setting chamber 311, sand setting
The top and bottom of pipe 31 are in closed state, and the feed liquor being connected with sand setting chamber 311 is offered on the outer wall of sand sediment pipe 31
Passage 312；Two grades of sand control screens 32 be cylindrical in shape and two grades of sand control screens 32 bottom end closure, sand sediment pipe 31 and two grades of sand control screens
32 in being vertically arranged, and two grades of sand control screens 32 from top to bottom through the top of sand sediment pipe 31 and are inserted in sand setting chamber 311, and two grades are prevented
Connection sand setting chamber 311 and the flowing hole 321 of two grades of inner chambers of sand control screen 32, two grades of sand screens are offered on the tube wall of sand sieve pipe 32
The top of pipe 32 is connected with packer 40.Fluid carries fine sand and soil passes through the feed pathway on the tube wall of sand sediment pipe 31
312 enter in sand setting chamber 311, and the flowing hole 321 that fluid is continued through on two grades of tube walls of sand control screen 32 afterwards enters sand screen
The inner chamber of pipe, and the fine sand and soil entrained by fluid are blocked down, final realization pair due to that can not enter flowing hole 321
The filtering of fine sand and soil, meanwhile, the fine sand and accumulation of mud being blocked will not fall after rise again in sand sediment pipe 31.It is anti-settling
Fine sand is blocked in outside two grades of sand control screens 32 by two grades of sand control screens 32 in sand device 30, it is therefore prevented that fine sand is to oil pumping
Pump 70 causes abrasion and holddown.
Due to the utility model proposes rod-pumped well productive completion tubing string 100 be connected in the lower end of packer 40 it is anti-settling
Sand device 30, anti-sand-catching apparatus 30 can filter and deposit the part silt particle in crude oil, slow down rod-pumped well productive completion tubing string 100
The blocking of other parts such as oil well pump 70 and oil pipe 80.
In an optional example, the diameter (external diameter) of sand sediment pipe 31 is 114.3mm, the diameter of two grades of sand control screens 32
(external diameter) is 88.9mm；The length of sand sediment pipe 31 is more than the length of two grades of sand control screens 32,31 to two grades of sand control screens of sand sediment pipe
32 1~100m of length.Two grades of sand control screens 32 can use metal ring cutting screen casing or metallic mesh screen pipe, two grades of sand control screens 32
Sand block particle diameter (diameter of flowing hole 321) is 0.05~0.20mm.
In one optional example of the utility model, as shown in figure 4, perforated pipe 60 is the pipe with up/down perforation inner chamber
The eyelet 61 with the intracavity inter-connection of perforated pipe 60 is offered on shape body, the outer wall of perforated pipe 60.During backwash de-plugging, backwash de-plugging
Liquid can be entered in the inner chamber of perforated pipe 60 by eyelet 61.
In the utility model in another optional example, as shown in figure 5, rod-pumped well productive completion tubing string 100 is also wrapped
Hanging packer 20 and one-level sand control screen 10 are included, one-level sand control screen 10 is connected to the lower end of hanging packer 20, suspension envelope
Set every device 20 on sleeve pipe 201 and make one-level sand control screen 10 corresponding with oil layer section.One-level sand control screen 10 can be used
Cutting seam sieve tube or ladder stitch screen casing, the sand block particle diameter of one-level sand control screen 10 is 0.4~0.8mm.The one-level for being suspended on oil layer section is prevented
Sand sieve pipe 10, which is mainly used in the support borehole wall, prevents hole collapse, while coarse sand granule to be stopped to the outside of one-level sand control screen 10, rises
To the effect of appropriate sand control.
In one optional example of the utility model, the sand block particle diameter of one-level sand control screen 10 is more than anti-sand-catching apparatus 30
Sand block particle diameter.One-level sand control screen 10 can stop coarse sand granule outside screen casing, allow that fine sand and soil enter in screen casing
Portion, plays appropriate sand control effect, reduces the accumulation degree of the outside layer of sand of one-level sand control screen 10, increase the permeability of layer of sand,
Slow down blocking.Fine sand is blocked in outside two grades of sand control screens 32 by two grades of sand control screens 32 in anti-sand-catching apparatus 30, is prevented
Fine sand causes abrasion and holddown to oil well pump 70.As a result of multistage sand control method, by the sand-grading mistake of different-grain diameter
Filter, while reducing the accumulation degree of the outside of one-level sand control screen 10 and two grades of outside layers of sand of sand control screen 32, increases layer of sand
Permeability, slow down blocking.Also, the sand sediment pipe 31 in anti-sand-catching apparatus 30 can be collected thin outside two grades of sand control screens 32
Sand grains and soil, prevent fine sand and soil from falling into inside one-level sand control screen 10, it is to avoid one-level sand control screen 10 occurs sand and buried
And sand plug, and then extend the use time of one-level sand control screen 10.
Refer to Fig. 5, Fig. 7 and Fig. 8, the utility model proposes back-washable de-plugging sand control backwash valve 50 the course of work
For：
First, as shown in figure 5, install the utility model proposes back-washable de-plugging sand control backwash valve 50 be arranged on oil pumping
Motor-pumped well productive completion tubing string 100.One-level sand control screen 10 is connected to the lower end of hanging packer 20；Suspension packing after connection
Device 20 and one-level sand control screen 10 together in tripping in sleeve pipe, make one-level sand control screen 10 corresponding with oil layer section 204；By suspension envelope
Set every device 20 on the inwall of sleeve pipe 201.Anti- desilting device 30, packer 40, back-washable de-plugging are smoothly connected from the bottom to top
Backwash valve 50, perforated pipe 60, oil well pump 70 and the oil pipe 80 of sand control, by the anti-desilting device 30 connected, packer 40, can be anti-
Wash in backwash valve 50, perforated pipe 60, oil well pump 70 and the tripping in sleeve pipe 201 of oil pipe 80 of de-plugging sand control, and set packer 40
On the inwall of sleeve pipe 201.
In production process, as shown in fig. 7, oil pumping pump startup, formation fluid carries sand grains and soil and enters set from stratum
Pipe 201.Under the stop of one-level sand control screen 10, coarse sand granule is filtered, and it is anti-into one-level that fluid carries fine sand and soil
The inside of sand sieve pipe 10 simultaneously continues up flowing through hanging packer 10.Afterwards, the fluid of carrying fine sand and soil passes through anti-
The feed pathway 312 of sand sediment pipe 31 enters the anti-inside of sand-catching apparatus 30 (in sand setting chamber 311) in sand-catching apparatus 30, in two grades of sand controls
Under the stop of screen casing 32, fine sand and part soil are filtered；Meanwhile, fluid continues the remaining soil of carrying and entered through flowing hole 321
Enter two grades of inside of sand control screen 32 and continue up flowing.Then, all of the backwash valve 50 of back-washable de-plugging sand control is opened on fluid top
That ball 542, enters oil well pump 70 and oil pipe 80 by the main fluid course 52 of the backwash valve 50 of back-washable de-plugging sand control, finally adopts
Go out to ground.
It should be noted that in above-mentioned production process, fine sand, soil and gum asphalt in fluid can be deposited on
In two grades of sand control screens 32, oil well pump 70 and oil pipes 80, with the growth of production time, above-mentioned solid impurity can be to two grades of sand controls
Screen casing 32, oil well pump 70 and oil pipe 80 result in blockage, and cause the oil well underproduction.Now, it is necessary to carry out backwash de-plugging operation, dredge
Logical productive completion tubing string, resumes production.
During backwash de-plugging, such as Fig. 8 goes out without 100 by rod-pumped well productive completion tubing string, directly carries out backwash solution
It is stifled.The detailed process of backwash de-plugging is as follows：First, sleeve valve 202 is opened, backwash blockages relieving fluid is injected, wherein, anti-de-plugging
Washing lotion can be clear water, acid solution or surfactant solution.After backwash blockages relieving fluid sleeve pipe 201, from the eyelet of perforated pipe 60
Enter in 61 inside rod-pumped well productive completion tubing string 100；Due to the pressure of now face-pumping it is smaller (ground pump pressure is less than 10~
The barrier effect of valve ball 542 15MPa) and in the backwash valve 50 of back-washable de-plugging sand control, backwash blockages relieving fluid can only be toward oil pumping
The top of motor-pumped well productive completion tubing string 100 is flowed, so that de-plugging is rinsed to oil well pump 70 and oil pipe 80, by oil well pump 70 and oil
Soil in pipe 80 is flushed to ground.When in the backwash blockages relieving fluid returned out in rod-pumped well productive completion tubing string 100 be free of soil
When, show that top tubing string has been rinsed well.Afterwards, production valve 203 is closed, continues to inject backwash de-plugging into sleeve pipe 201
Liquid, is built the pressure.When pressure reaches certain value (now ground pump pressure is more than 10~15MPa), backwash blockages relieving fluid will be promoted
Sliding sleeve 552 in the backwash valve 50 of back-washable de-plugging sand control is moved down, and exposes inner tube 511 in the backwash valve 50 of back-washable de-plugging sand control
Inlet opening 531 on tube wall.Backwash blockages relieving fluid enters bypass fluid course 53 through inlet opening 531, and is back to from fluid hole 532
In main fluid course 52, then, wash blockages relieving fluid and enter inside two grades of sand control screens 32 in anti-sand-catching apparatus 30, it is anti-from two grades
Screen casing is rinsed inside sand sieve pipe 32, will be thin on the outside of filter medium in two grades of sand control screens 32 and two grades of sand control screens 32
Sand grains and soil are washed out, in the sand setting chamber 311 for dropping into sand sediment pipe 31.
After the backwash de-plugging end of job, stop injection backwash blockages relieving fluid, the internal pressure of rod-pumped well productive completion tubing string 100
Decline, sliding sleeve 552 is up moved under the promotion of spring 551 in the backwash valve 50 of back-washable de-plugging sand control, again by inlet opening
531 closure.Now, sleeve valve 202 is closed, production valve 203 is opened, production can be continued.
For explaining in detail for the respective embodiments described above, its purpose is only that to explain to the utility model, in order to
The utility model is better understood when, still, these descriptions can not be with any explanation into being to limit of the present utility model
System, particularly, each feature described in various embodiments can also be mutually combined, so as to constitute other implementations
Mode, except there is clearly opposite description, these features should be understood to be applied in any one embodiment, and simultaneously
It is not only limited to described embodiment.
Claims (10)
1. a kind of backwash valve of back-washable de-plugging sand control, including valve body, it is characterised in that main fluid course is provided with the valve body
With bypass fluid course, the main fluid course up/down perforation, in the main fluid course provided with only allow liquid by it is lower extremely
On the single current core assembly that passes through, the bypass fluid course has an inlet and liquid outlet, the inlet and it is described go out liquid
Mouth is connected with the main fluid course, and the inlet is located at the top of the single current core assembly, the liquid outlet position
At the lower section of the single current core assembly, the inlet provided with control the inlet connected with the main fluid course and
The switch element of cut-off.
2. the backwash valve of back-washable de-plugging sand control as claimed in claim 1, it is characterised in that the valve body includes being vertically arranged
Inner and outer tubes, said inner tube is the tubular body of up/down perforation, and the tube wall of said inner tube encloses the main fluid course, institute
State outer tube to be cylindrical in shape and be set in outside said inner tube, the top and bottom of the outer tube are sealed with the outer wall of said inner tube to be connected
Connect, there is annular space, the inlet and the liquid outlet are opened in said inner tube between the outer tube and said inner tube
Tube wall on and connect the main fluid course and the annular space, the inlet, the annular space and it is described go out liquid
The mouth composition bypass fluid course.
3. the backwash valve of back-washable de-plugging sand control as claimed in claim 2, it is characterised in that said inner tube it is a diameter of
88.9mm, a diameter of 114.3mm of the outer tube.
4. the backwash valve of back-washable de-plugging sand control as claimed in claim 2, it is characterised in that the switch element includes spring
With tubular sliding sleeve, the sliding sleeve is set in said inner tube and is slidably matched with said inner tube sealing, passes through the sliding sleeve
Move up and down UNICOM and the cut-off for controlling the inlet and the main fluid course, the inwall of said inner tube is provided with along institute
The limited step of the radially protruding of inner tube is stated, the limited step is located at the lower section of the sliding sleeve, one end contact of the spring
On the limited step, the other end contact of the spring is on the sliding sleeve；The inwall of the sliding sleeve bottom is provided with one
The step formation valve ball seat of circle protrusion, the valve ball seat is provided with the valve ball of corresponding cooperation, the valve ball seat
The single current core assembly is constituted with the valve ball.
5. the backwash valve of back-washable de-plugging sand control as claimed in claim 4, it is characterised in that the valve ball seat with it is described all
The contact surface of your ball is the arc surface of indent.
6. the backwash valve of back-washable de-plugging sand control as claimed in claim 4, it is characterised in that the sliding sleeve and said inner tube
Sealing ring is provided between tube wall.
7. the backwash valve of back-washable de-plugging sand control as claimed in claim 6, it is characterised in that the sliding sleeve and said inner tube it
Between provided with two sealing rings, after the sliding sleeve closes the inlet, two sealing rings be located at respectively it is described enter
Above and below liquid mouthful.
8. the backwash valve of back-washable de-plugging sand control as claimed in claim 2, it is characterised in that opened up on the tube wall of said inner tube
There are multiple inlet openings and multiple fluid holes, multiple inlet openings are uniform along the circumference of said inner tube.
9. the backwash valve of back-washable de-plugging sand control as claimed in claim 1, it is characterised in that the top of the valve body is provided with upper
Joint, the bottom of the valve body is provided with lower contact, and the main fluid course runs through the top connection and the lower contact.
10. the backwash valve of back-washable de-plugging sand control as claimed in claim 9, it is characterised in that in the top connection is offered
Screw thread, the lower contact offers external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621453215.XU CN206458408U (en) | 2016-12-28 | 2016-12-28 | Backwash valve capable of backwashing, blocking removal and sand prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621453215.XU CN206458408U (en) | 2016-12-28 | 2016-12-28 | Backwash valve capable of backwashing, blocking removal and sand prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206458408U true CN206458408U (en) | 2017-09-01 |
Family
ID=59698256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621453215.XU Active CN206458408U (en) | 2016-12-28 | 2016-12-28 | Backwash valve capable of backwashing, blocking removal and sand prevention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206458408U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723405A (en) * | 2018-12-18 | 2019-05-07 | 中海油能源发展股份有限公司 | A kind of pressure transmitting type ball-and-seat for frac-pack tubing string |
| CN111441739A (en) * | 2020-04-30 | 2020-07-24 | 大庆宏升石油机械设备制造有限公司 | Mechanical compression type tubular column switch type packer |
| CN115110916A (en) * | 2022-07-25 | 2022-09-27 | 中国石油化工股份有限公司 | Pressure-adjustable vortex tube |
-
2016
- 2016-12-28 CN CN201621453215.XU patent/CN206458408U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723405A (en) * | 2018-12-18 | 2019-05-07 | 中海油能源发展股份有限公司 | A kind of pressure transmitting type ball-and-seat for frac-pack tubing string |
| CN111441739A (en) * | 2020-04-30 | 2020-07-24 | 大庆宏升石油机械设备制造有限公司 | Mechanical compression type tubular column switch type packer |
| CN115110916A (en) * | 2022-07-25 | 2022-09-27 | 中国石油化工股份有限公司 | Pressure-adjustable vortex tube |
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