CN110080742A - A kind of rotary screw type gas anchor - Google Patents
A kind of rotary screw type gas anchor Download PDFInfo
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- CN110080742A CN110080742A CN201910425478.1A CN201910425478A CN110080742A CN 110080742 A CN110080742 A CN 110080742A CN 201910425478 A CN201910425478 A CN 201910425478A CN 110080742 A CN110080742 A CN 110080742A
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- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 42
- 230000000694 effects Effects 0.000 abstract description 19
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000000926 separation method Methods 0.000 description 15
- 239000000203 mixture Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 239000012071 phase Substances 0.000 description 8
- 241000883990 Flabellum Species 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 210000002583 cell-derived microparticle Anatomy 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of rotary screw type gas anchors, the gas anchor includes anchor shell, and one end of the anchor shell is provided with top connection, and the other end is provided with lower contact, the central tube for axially extending arrangement is provided in the anchor shell, the rotating middle part of the central tube is provided with conveyor screw；One end of the conveyor screw is mounted on central tube by the first revolving part, and the other end extends through the second revolving part towards top connection and is mounted on central tube；The central tube is provided with annular installation step close to one end outer ring of lower contact, and the annular installation step is abutted with the first revolving part；The central tube is arranged with holddown spring close to one end outer ring of top connection, and one end of the holddown spring is abutted with the second revolving part, and the other end is abutted with top connection.The present invention makes it generate rotation using air-liquid fluid impact conveyor screw, and the conveyor screw of rotation can make air-liquid have more efficient separating effect.
Description
Technical field
The present invention relates to the technical fields of oil exploration & development, and in particular to a kind of rotary screw type gas anchor.
Background technique
In oil exploration & development field, due to containing a large amount of free gas in high gas-liquid ratio block fluid, pumping is being used
Gas seriously affects pump efficiency when oil pump recovers the oil to it, need to match gas anchor and isolate the gas in gas-liquid mixture fluid
Come, to reduce influence of the gas to pump efficiency.Existing gas anchor main Types have gravitational difference separate type gas anchor, spiral gas anchor and combination
Formula gas anchor, specific as follows:
One, gravitational difference separate type gas anchor, also referred to as gravity type gas anchor, such as Fig. 1, mainly by top connection 2, anchor ectosome 15, center
The composition such as pipe 4, lower contact 3.Its principle is the slippage effect separation gas phase generated using air-liquid density contrast.Work as oil pump plunger piston
When uplink is aspirated, air-liquid mixture is entered the annular space deposit cavity that anchor ectosome is formed with inner tube by the import and export on anchor ectosome top.
When oil pump plunger piston downlink stops taking out, gas-liquid mixture will make gas float under the effect of air-liquid density contrast in deposit cavity, when
Discharge when gas floats to the gas-liquid inlet and outlet of anchor ectosome, to substantially reduce influence of the gas into pump to pump efficiency.The gas anchor is excellent
Point: structure is simple, manufacturing cost is low.Disadvantage: separative efficiency is lower, inadaptable compared with high yield liquid, high gas-oil ratio (HGOR) producing well.It leans on merely
The gas anchor of slippage effect has been eliminated at present.
Two, spiral separating type gas anchor, also referred to as spiral gas anchor.
(1) it is described in " gas prevention pump and gas anchor summarize " (petroleum machinery the, 2l volumes, the 4th phase, in April, 1993) text
The first spiral gas anchor, such as Fig. 2.Mainly by lower contact 3, central tube 4, flight 16, venthole 17, connector sleeve 18, feed liquor
The composition such as hole 19, gas vent 20, top connection 2.The gas anchor working principle: gas-liquid mixture through inlet opening 19 enter central tube 4 with
The anchor chamber that connector sleeve 18 is constituted makes bubbling polymerization principle using centrifuge separation and turbulent flowization along 16 runner of flight, makes gas-liquid flow
The centrifugal force of fluid of body rotational flow in gas anchor, different densities is different, flows the air pocket assembled along inside spiral, band
Have and is not flowed along outside then by the liquid of isolated minute bubbles.The air pocket assembled constantly is assembled, along inside venthole 17
It rises to screw top and is gathered into gas cap, be discharged to oil sets annular space by gas vent 20.Spiral gas anchor advantage is that point gas is imitated
Rate is higher, it is compact-sized, adapt to higher Liquid output, high gas-liquid ratio producing well.The disadvantage is that being not suitable with low yield well.
(2) " analysis of system in Tahe Oilfield gas-tight technology " (petroleum machinery the 7th phase of volume 42 in 2014) text describes second
Spiral gas anchor, such as Fig. 3.Its structure is mainly by top connection 2, exhaust pipe 21, ball-and-seat 22, gas gathering mask 23, jackscrew 24, outer tube
25, helical blade 5.2, lower contact 3 etc. form.Its working principle is that gas mixture enters helical blade through gas anchor lower contact 3
5.2 ask that the departure date asks along helicoid with the annular sky asked of outer tube 25, since centrifugal force acts on, liquid stream along outside spiral uplink,
Annular space by outer tube 25 and gas gathering mask 23 enters pump barrel；Air-flow is run on the inside of helical blade 5.2, finally in gas gathering mask
" gas cap " is formed in 23 and opens ball-and-seat 22, is discharged through exhaust pipe 21.Compared with gas anchor gas anchor shown in Fig. 3, except there is structural type
Outside the similar spiral of formula, increase devises " gas cap " collection structure part.Its excellent, disadvantage is in addition to identical as gas anchor shown in Fig. 3, gas
The design of body collection part is difficult to demonstrate,prove its effect.
(3) utility model patent number 02293298.4 describes a kind of " fan blade type gas anchor ", such as Fig. 4.Its structure mainly by
Settle the compositions such as bowl 26, flabellum 27, spiral plate 28, gas collecting jar with ground-on cover plate 29, gas gathering mask 23, the company of ball-and-seat 22.The gas anchor is in spiral plate 28
A flabellum is installed in lower part, it gets excited rotation by the oil-gas mixture risen in gas collecting jar with ground-on cover plate, and generate in rotary course from
Heart effect, liquid density is larger, in flabellum edge throw to 29 inner wall of gas collecting jar with ground-on cover plate, these liquid are continuously heaped
Get up, finally because being gravitationally fallen on following spiral plate 28；And gas is small compared with fluid density, is gathered in 27 axle center of flabellum week
It encloses, and when reaching certain pressure, opens the annular space that ball-and-seat 22 discharge oil pipe and casing through exhaust passage, to reach
The purpose of gas-liquid separation is arrived.Compared with gas anchor gas anchor shown in Fig. 3, Fig. 4, in addition to the spiral for having structural shape similar, increase
Rotatable " flabellum " structure is devised, which can play a role to gas-liquid fluid eddy flow.
Three, combined type gas anchor, i.e., from it is different divide gas principle or with the gas anchor that forms of other tool.By spiral separation and
The combined type gas anchor that Gravity Separation difference divides gas principle to form, gas anchor as shown in Figure 2 lengthen 4 He of central tube in its spiral lower part
Connector sleeve 18 forms it into longer Gravity Separation annular space deposit cavity, then constitutes the different combined type gas for dividing gas principle to form
Anchor." design of spiral downhole oil gas separating device is analyzed with separating effect " (oil field equipment, 2011, the 6th phase, volume 40)
A kind of combined type gas anchor being made of gas anchor and packer tool, such as Fig. 5 are described in one text.It is mainly by casing 29, exhaust
Hole 20, outer cylinder 30, eyelet 31, spiral 32, central tube 4, tap 33, packer 34), the composition such as oil pipe 35.Its work is former
Reason be air-liquid fluid along packer lower part tail pipe after tap 33 enters separator annular space, by central tube 4 outside
The spiral on top makes oil gas generate rotational flow with higher speed.Turbulent flowization and centrifugation accelerate the poly- of minute bubbles
It closes, flows the lesser air pocket of density along inside spiral, the biggish liquid stream of density is then flowed along outside.Along the big of inside flowing
Bubble constantly polymerization again, and screw top aggregation is risen to, gas is then from the gas vent on top connection top in the form of continuous phase
20 drain into casing annulus.When liquid stream containing minute bubbles rises to separator top perforated section, oil is thrown to by eyelet
Casing annulus.Since flow stream velocity reduces suddenly in annular space, wherein a part of bubble of institute's band will float and direct quilt
It is separated in the oil jacket annulus on separator top, although the lesser bubble of another part diameter is brought into annular space, in undershoot
When journey pump stops sucking, flow stream velocity is zero in casing and anchor cylinder annular space, on a portion bubble floating to separator
In the oil jacket annulus in portion.Finally, only small part minute bubbles in upstroke enter pump along central tube with through suction inlet by liquid stream
It is interior, achieve the purpose that Oil-gas Separation.Structure type combination gas anchor can utilize wellbore section space, gas anchor to greatest extent
Design space is larger, spiral centrifugal separation and gravity settling separation effect can be relatively given full play to, so that gas separative efficiency is effective
It improves.But due to being furnished with packer, so that construction is inconvenient and packer validity period is shorter and influences production, in addition sand output well is not yet
It can use.
In conclusion needing research to set to solve the coverage area that above-mentioned contradiction is effectively treated flow with increase gas anchor
Counting a kind of rotation spiral combined type gas anchor has very great meaning.
Summary of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned background technique, a kind of rotary screw type gas anchor, the gas anchor are provided
So that its is generated rotation using air-liquid fluid impact conveyor screw, the conveyor screw of rotation can make gas separation effect is higher, effect more
It is good, and applicable gas-liquid volume range is big.
To achieve the above object, a kind of rotary screw type gas anchor designed by the present invention, including anchor shell, the anchor shell
One end be provided with top connection, the other end is provided with lower contact, is provided with the center for axially extending arrangement in the anchor shell
Pipe, the rotating middle part of the central tube are provided with conveyor screw；One end of the conveyor screw is mounted on center by the first revolving part
Guan Shang, the other end extend through the second revolving part towards top connection and are mounted on central tube；The central tube is close to lower contact
One end outer ring is provided with annular installation step, and the annular installation step is abutted with the first revolving part；The central tube is close to upper
One end outer ring of connector is arranged with holddown spring, and one end of the holddown spring is abutted with the second revolving part, the other end with above connect
Head abuts.
In above-mentioned technical proposal, the anchor shell is circumferentially provided with several circulations along its outer wall close to one end of top connection
Hole.
In above-mentioned technical proposal, the central tube offers through hole on one end of lower contact.
In above-mentioned technical proposal, one end of the anchor shell is threadedly coupled with top connection, and the other end and lower contact screw thread connect
It connects.
In above-mentioned technical proposal, the both ends inner wall of the anchor shell is provided with internal screw thread, the top connection and lower contact
Outer wall is provided with and the matched external screw thread of internal screw thread.
In above-mentioned technical proposal, one end of the central tube is plugged in top connection and is tightly connected by sealing ring, separately
One end is plugged in lower contact and is firmly connected with it.
In above-mentioned technical proposal, the conveyor screw includes hollow cylinder, and the outer wall of the cylinder is provided with along its axial direction
The helical blade being extended continuously.
In above-mentioned technical proposal, first revolving part includes the first support pad and the first support ring, first support pad
One side end face is abutted with annular installation step, between another side end face of first support pad and a side end face of the first support ring
It is provided with the first thrust bearing, another side end face of first support ring is fixedly connected with conveyor screw.
In above-mentioned technical proposal, ladder hole, the middle part of first support ring are provided in the middle part of first support pad
It is provided with installation through-hole.
In above-mentioned technical proposal, second revolving part includes the second support pad and the second support ring, second support pad
One side end face is abutted with holddown spring, is arranged between another side end face of second support pad and a side end face of the second support ring
There is the second thrust bearing, another side end face of second support ring is fixedly connected with conveyor screw.
Compared with prior art, the present invention has the advantage that
First, rotary screw type gas anchor design of the invention has rotatable conveyor screw, the rotation of spiral changes former solid
The stress and Migration mark of gas-liquid particle when fixed pattern spiral gas-liquid separates, the spiral of existing gas anchor is fixed structure pattern,
Gas-liquid particle is to generate centrifugal force by spiral channel water conservancy diversion under differential pressure action, and particle could only obtain in flow at high speed higher
Centrifugal acceleration and generate preferable separating effect.The present invention due to rotatable conveyor screw intervention, gas-liquid particle in addition to
By spiral channel water conservancy diversion generate centrifugal force outside, also by helical blade when inswept by " drives " rotary motion, at this time particle generation
Centrifugal effect is much larger than the former, and particle is also can under lower revolving speed just as " substance " in a rotating circular disc
Very readily it is centrifuged " getting rid of " to the periphery；In addition, the relative velocity between fluid and blade is reduced, friction when spiral rotating
Resistance becomes smaller, and the gas-liquid separation state formed after centrifugation is not easy to re-mix；In addition, the inertia that helical blade rotation generates, right
There is a motive force around fluid, improve the circumferential speed of fluid, centrifugal force becomes larger, therefore the separative efficiency of gas-liquid can be more preferable.
Second, rotary screw type gas anchor of the invention is compared with existing fan blade type gas anchor, due to existing blade structure
It is very short on axial length, only eddy flow, and the rotation spiral entirety axial length that the present invention uses locally are generated in axial length
To the fluid effect of generation simultaneously, the centrifugation continuously to gas-liquid fluid can be played.
Third, the present invention realizes two kinds of separate modes because of spiral rotating, to gas-liquid, first is that gas-liquid was rotated along spiral channel
Centrifuge separation is centrifugated second is that being rotated pressure when driving by helical blade.In addition, adapting to the gas-liquid volume range of processing more
Widen it is general, because compared with being that spiral cannot be driven to rotate under low discharge, at this time as conventional fixed spiral gas anchor work is former
It manages, is also the conventional fixed highest state of spiral gas anchor efficiency under the situation；When gas-liquid amount to be treated increases, spiral
It is rotated by impact, is for another example intervened with " turbine ", helical blade rotation drives the effect enhancing of liquid phase centrifuge separation, therefore of the invention
A kind of gas-liquid volume range that rotary screw type gas anchor adapts to is big, gas separation effect is higher, effect is more preferable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing gravitational difference separate type gas anchor；
Fig. 2 is the structural schematic diagram of the first existing spiral gas anchor；
Fig. 3 is the structural schematic diagram of existing second of spiral gas anchor；
Fig. 4 is the structural schematic diagram of existing fan blade type gas anchor；
Fig. 5 is the structural schematic diagram of existing combined type gas anchor；
Fig. 6 is the structural schematic diagram of rotary screw type gas anchor of the present invention；
Fig. 7 is the enlarged structure schematic diagram of the central tube in Fig. 6；
Fig. 8 is the enlarged structure schematic diagram of the conveyor screw in Fig. 6；
Fig. 9 is the enlarged structure schematic diagram of the first support pad in Fig. 6；
Figure 10 is the enlarged structure schematic diagram of the first support ring in Fig. 6；
In figure: 1- anchor shell, 2- top connection, 3- lower contact, 4- central tube, 5- conveyor screw, 5.1- cylinder, 5.2- helical-blade
Piece, the first revolving part of 6-, the first support pad of 6.1-, 6.11- ladder hole, the first support ring of 6.2-, 6.21- installation through-hole, 6.3-
First thrust bearing, the second revolving part of 7-, the second support pad of 7.1-, the second support ring of 7.2-, the second thrust bearing of 7.3-, 8- annular
Installation step, 9- holddown spring, 10- recirculation hole, 11- through hole, 12- internal screw thread, 13- external screw thread, 14- sealing ring, outside 15- anchor
Body, 16- flight, 17- venthole, 18- connector sleeve, 19- inlet opening, 20- gas vent, 21- exhaust pipe, 22- ball-and-seat, 23-
Gas gathering mask, 24- jackscrew, 25- outer tube, 26- sedimentation bowl, 27- flabellum, 28- spiral plate, 29- casing, 30- outer cylinder, 31- eyelet,
32- spiral, 33- tap, 34- packer, 35- oil pipe.
Specific embodiment
Below with reference to the case study on implementation performance that the present invention will be described in detail, but they are not constituted to limit of the invention
It is fixed, it is only for example.Simultaneously by illustrating that advantages of the present invention will become clearer and be readily appreciated that.
A kind of rotary screw type gas anchor as shown in FIG. 6, including anchor shell 1, one end of the anchor shell 1, which is provided with, to be connect
First 2, the other end is provided with lower contact 3, and one end of the anchor shell 1 is threadedly coupled with top connection 2, the other end and 3 spiral shell of lower contact
Line connection.The both ends inner wall of the anchor shell 1 is provided with internal screw thread 12, and the outer wall of the top connection 2 and lower contact 3 is provided with
With the matched external screw thread 13 of internal screw thread 12.The central tube 4 for axially extending arrangement, the center are provided in the anchor shell 1
One end of pipe 4 is plugged in top connection 2 and is tightly connected by sealing ring 14, and the other end is plugged in lower contact 3 and is secured to
Connection.The anchor shell 1 is circumferentially provided with several recirculation holes 10, the central tube 4 along its outer wall close to one end of top connection 2
Through hole 11 is offered on one end of lower contact 3.
In above-mentioned technical proposal, the rotating middle part of the central tube 4 is provided with conveyor screw 5, and one end of the conveyor screw 5 is logical
It crosses the first revolving part 6 to be mounted on central tube 4, the other end extends through the second revolving part 7 towards top connection 2 and is mounted on central tube
On 4.As shown in fig. 7, the central tube 4 is provided with annular installation step 8, the annular peace close to one end outer ring of lower contact 3
Dress step 8 is abutted with the first revolving part 6.As shown in figure 8, the conveyor screw 5 includes hollow cylinder 5.1, the cylinder 5.1
Outer wall is provided with the helical blade 5.2 along its axially consecutive extension.
In above-mentioned technical proposal, first revolving part 6 includes the first support pad 6.1 and the first support ring 6.2, such as Fig. 9 and
Shown in Figure 10, the middle part of first support pad 6.1 is provided with ladder hole 6.11, the middle part setting of first support ring 6.2
There is installation through-hole 6.21.One side end face of first support pad 6.1 is abutted with annular installation step 8, first support pad 6.1
The first thrust bearing 6.3, first support ring are provided between another side end face and a side end face of the first support ring 6.2
6.2 another side end face is fixedly connected with conveyor screw 5.
In above-mentioned technical proposal, the central tube 4 is arranged with holddown spring 9, the pressure close to one end outer ring of top connection 2
One end of tight spring 9 is abutted with the second revolving part 7, and the other end is abutted with top connection 2.Second revolving part 7 includes second
Pad 7.1 and the second support ring 7.2, a side end face of second support pad 7.1 are abutted with holddown spring 9, second support pad 7.1
Another side end face and the second support ring 7.2 a side end face between be provided with the second thrust bearing 7.3, second support ring
7.2 another side end face is fixedly connected with conveyor screw 5.
The working principle of rotary screw type gas anchor of the present invention, specific as follows:
When oil well pump suction, air-liquid mixture enters in anchor shell 1 through the recirculation hole 10 on 1 top of anchor shell, with gas-liquid
Impact flow conveyor screw 5 rotates, and air-liquid is driven by conveyor screw 5 and generates circumference eddy flow, and gas phase is from liquid phase because density contrast generation is different
Centrifugal force, to make the constraint for getting rid of adhesion strength (Si Tuokesili) of asking of gas phase and liquid phase, gas phase forms inward eddy, on edge
Assemble and float in inner circumferential while radial mobile to axle center.And the quilt under inertial centrifugal effect of the liquid phase containing a small amount of minute bubbles
" getting rid of " to the periphery, forms contour stealth and spins downwards movement from 1 inner wall of anchor shell radially and axially, into anchor shell 1 in
Between heart pipe 4 in the deposit cavity of lower part, Gravity Separation is carried out again, through hole of the liquid phase after sedimentation again through 4 lower part of central tube
11 enter oil well pump.When oil pump plunger piston downlink stops taking out, gas anchor stops sucking, and lower part is heavy between anchor shell 1 and central tube 4
The intracavitary liquid phase containing a small amount of bubble of product floats under the effect of gas-liquid density contrast and is pooled to top.And in spiral shell while stopping taking out
The gas of 5 inner circumferential of body aggregation is revolved, is equally discharged under gravitational difference effect from the recirculation hole 10 on 1 top of anchor shell, into oil jacket ring
It is empty.
It is other unspecified to belong to the prior art.
Claims (10)
1. one end of a kind of rotary screw type gas anchor, including anchor shell (1), the anchor shell (1) is provided with top connection (2), separately
One end is provided with lower contact (3), it is characterised in that: is provided with the central tube for axially extending arrangement in the anchor shell (1)
(4), the rotating middle part of the central tube (4) is provided with conveyor screw (5)；
One end of the conveyor screw (5) is mounted on central tube (4) by the first revolving part (6), and the other end is towards top connection (2)
The second revolving part (7) is extended through to be mounted on central tube (4)；
The central tube (4) is provided with annular installation step (8) close to one end outer ring of lower contact (3), the annular erecting bed
Rank (8) abuts with the first revolving part (6)；
The central tube (4) is arranged with holddown spring (9) close to one end outer ring of top connection (2), and the one of the holddown spring (9)
End is abutted with the second revolving part (7), and the other end is abutted with top connection (2).
2. rotary screw type gas anchor according to claim 1, it is characterised in that: the anchor shell (1) is close to top connection (2)
One end be circumferentially provided with several recirculation holes (10) along its outer wall.
3. rotary screw type gas anchor according to claim 2, it is characterised in that: the central tube (4) is close to lower contact (3)
One end on offer through hole (11).
4. rotary screw type gas anchor according to claim 3, it is characterised in that: one end of the anchor shell (1) with above connect
Head (2) is threadedly coupled, and the other end is threadedly coupled with lower contact (3).
5. rotary screw type gas anchor according to claim 4, it is characterised in that: the both ends inner wall of the anchor shell (1) is set
It is equipped with internal screw thread (12), the outer wall of the top connection (2) and lower contact (3) is provided with and internal screw thread (12) matched external screw thread
(13)。
6. rotary screw type gas anchor according to claim 5, it is characterised in that: one end of the central tube (4) is plugged on
It is tightly connected in top connection (2) and by sealing ring (14), the other end is plugged in lower contact (3) and is firmly connected with it.
7. described in any item rotary screw type gas anchors according to claim 1~6, it is characterised in that: the conveyor screw (5) includes
Hollow cylinder (5.1), the outer wall of the cylinder (5.1) are provided with the helical blade (5.2) along its axially consecutive extension.
8. rotary screw type gas anchor according to claim 7, it is characterised in that: first revolving part (6) includes first
Support pad (6.1) and the first support ring (6.2), a side end face of first support pad (6.1) are abutted with annular installation step (8),
The first thrust axis is provided between another side end face of first support pad (6.1) and a side end face of the first support ring (6.2)
It holds (6.3), another side end face of first support ring (6.2) is fixedly connected with conveyor screw (5).
9. rotary screw type gas anchor according to claim 8, it is characterised in that: set in the middle part of first support pad (6.1)
It is equipped with ladder hole (6.11), is provided with installation through-hole (6.21) in the middle part of first support ring (6.2).
10. rotary screw type gas anchor according to claim 9, it is characterised in that: second revolving part (7) includes second
One side end face of support pad (7.1) and the second support ring (7.2), second support pad (7.1) is abutted with holddown spring (9), described
The second thrust bearing is provided between another side end face of second support pad (7.1) and a side end face of the second support ring (7.2)
(7.3), another side end face of second support ring (7.2) is fixedly connected with conveyor screw (5).
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|---|---|---|---|
| CN201910425478.1A CN110080742A (en) | 2019-05-21 | 2019-05-21 | A kind of rotary screw type gas anchor |
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| CN201910425478.1A CN110080742A (en) | 2019-05-21 | 2019-05-21 | A kind of rotary screw type gas anchor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006766A (en) * | 2021-04-26 | 2021-06-22 | 东北石油大学 | Be applicable to downhole gas-liquid separation of shale oil pumping unit oil production system |
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| CN201443385U (en) * | 2009-07-03 | 2010-04-28 | 韩遵安 | Large-diameter oil-gas separating gas anchor |
| US20130068455A1 (en) * | 2011-09-20 | 2013-03-21 | Baker Hughes Incorporated | Shroud Having Separate Upper and Lower Portions for Submersible Pump Assembly and Gas Separator |
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