CN209557223U - Subsurface pump for heavy oil - Google Patents
Subsurface pump for heavy oil Download PDFInfo
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- CN209557223U CN209557223U CN201822116685.2U CN201822116685U CN209557223U CN 209557223 U CN209557223 U CN 209557223U CN 201822116685 U CN201822116685 U CN 201822116685U CN 209557223 U CN209557223 U CN 209557223U
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- pump
- plunger
- sand
- pump barrel
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Abstract
A kind of subsurface pump for heavy oil, the pump is made of assembly for plunger and pump barrel assembly, and assembly for plunger and pump barrel assembly composition, pull rod are connect with short-plunger, long pump barrel in short-plunger and pump barrel assembly is slidingly sealed cooperation, and access and two-stage check valve that fuel feeding passes through are equipped in short-plunger.The bottom of short-plunger is connect with long-plunger, the outer wall of long-plunger is equipped with movable pump barrel, movable pump barrel upper end is equipped with annular oil inlet valve ball, centering ring and oil inlet valve seat are equipped in the oil inlet outer tube of pump barrel assembly, the outer wall composition of centering ring and movable pump barrel is slidably connected, and oil inlet valve seat and annular oil inlet valve ball constitute annular one-way valve structures.Pump top half is the sand control structure with sand setting annular space and sand stop ring；Pump the sand control structure that lower half portion is long-plunger activity short pump barrel；Upper and lower series connection of pumps makes pump have downstream feedback power together.The pump has the characteristics of pump efficiency is high, sand controlling result is good, bearing capacity is strong, realizes the forward and reverse well-flushing of fixed tubular column, sand washing, is suitable for sanding heavy crude oil well exploitation.
Description
Technical field
The utility model relates to the specific feedback suction pumps for oil field sanding heavy crude oil well pumping crude oil, it is breached commonly
The structural limitation for feeding back suction pump, can efficient heavy crude producing and good sand controlling result.
Background technique
Chinese patent application 200420002748.7 " big channel sand control suction pump " uses thick different from common feedback pumping
The design being made of upper and lower series connection of pumps is pumped, which forms sealing pair by the long pump barrel of activity and fixed short-plunger using only a pair of
Single pump designs, gap of the pump barrel peripheral hardware in respect of sand setting annular space and sand setting tail pipe, between the long pump barrel of activity and fixed short-plunger
It misses under oil pressure effect, lost fluid opens the channel for entering oil jacket annulus, and pump is made to generate downward feedback force, reaches and smokes viscous crude
Purpose.But this design has layer pipe nested against one another, has compressed the scope of design of pump diameter；Since short-plunger is in cantilever position, arm
It is long extremely long, unstability bending is easy under the long pump barrel effect of activity and leads to the interior extension pipe root tripping fracture for connecting plunger；Cause
Pump each stroke wastage be it is continually changing, when the wastage of pump is few, downward feedback force can not be generated by being easy to appear
Situation, therefore this pump scope of application is small, reliability is poor；
The purpose of the utility model is to overcome above-mentioned deficiencies, provide a kind of subsurface pump for heavy oil, in common feedback suction pump knot
On the basis of structure, innovative sand control structure design is carried out to the upper and lower part of pump, structure is simple, reliable, and it is applied widely, make
The pump in sanding heavy crude oil well can efficient heavy crude producing, but also with good sand controlling result.
Utility model content
The main purpose of the utility model is to provide a kind of subsurface pump for heavy oil, often there is sand in heavy crude producing in solution
Grain, which enters in pump, causes sand card, sand to bury phenomenon.
A kind of subsurface pump for heavy oil that in order to solve the above technical problems, the technical scheme adopted by the utility model is:, by plunger
Assembly and pump barrel assembly composition, pull rod are connect with short-plunger, and the long pump barrel in short-plunger and pump barrel assembly is slidingly sealed cooperation, In
The access and two-stage check valve passed through in short-plunger equipped with fuel feeding；
The bottom of short-plunger is connect with long-plunger, and the outer wall of long-plunger is equipped with movable pump barrel, and movable pump barrel upper end is set
There is annular oil inlet valve ball；
Centering ring and oil inlet valve seat, the outer wall composition of centering ring and movable pump barrel are equipped in the oil inlet outer tube of pump barrel assembly
It is slidably connected, oil inlet valve seat and annular oil inlet valve ball constitute annular one-way valve structures.
It is interference fit between long-plunger and movable pump barrel, short column outer surface is equipped with and deposits sand annular groove in preferred embodiment.
In preferred embodiment, pump barrel assembly is made of sand-precipitating tube, short pump barrel, long pump barrel and oil inlet outer tube, is set inside sand-precipitating tube
Flexible position-limited claw, sand-precipitating tube cover in short pump barrel outer wall and form sand setting ring, and sand block is equipped between short pump barrel and elastic spacing pawl
Ring, sand stop ring are slidably connected with pull rod.
In preferred embodiment, two sides are the conical surface to sand stop ring up and down, wherein the outer circle of one side is provided with flow-conveying groove.
In preferred embodiment, the flow-conveying groove is rectangular channel, dovetail groove or semi-circular groove.
In preferred embodiment, the quantity of flow-conveying groove is one or more.
In preferred embodiment, is formed and be equipped with support ring inside sand setting ring.
In preferred embodiment, oil inlet outer tube is equipped with centering ring, and the activity pump barrel passes through centering ring.
In preferred embodiment, the sand ring shape flute profile of depositing of the short-plunger outer round surface is one or more.
The utility model has following advantages:
(1) limitation of common feedback suction pump structure is breached, the design of sand control structure is carried out to the upper and lower part of pump, without
Influence pumps the formation of hydraulic feedback power at work, simpler compared to existing sand control suction pump structure efficient, better reliability,
It is more suitable for the exploitation of sanding heavy crude oil well.
(2) sand stop ring is designed using special construction, can play the role of that sand grains is stopped to fall into pump barrel and provide liquid
Circulation road enables to generate downward hydraulic feedback power when pumping downlink, overcomes viscous crude resistance, it is stagnant to reduce roofbolt downlink in heavy oil wells
Problem afterwards.
(3) inlet valve using annular plate valve design, due to annular oil inlet valve ball design on movable pump barrel, valve ball diameter not by
Diameter of plunger limitation, ball valve diameter can increase, so that runner be made to increase, reduce viscous crude flow resistance, increase coefficient of fullness, improve
Pump efficiency, meanwhile, inlet valve is opened and closed by frictional force effect between plunger and movable pump barrel, and opening and closing flexibly, reduces viscous crude
Well fuel inlet ball check valve opens and closes lag issues.
(4) annular oil inlet valve ball design is on movable pump barrel, and when assembly for plunger is suggested pump barrel, movable pump barrel inner hole can
As fluid course, to realize the forward and reverse well-flushing of fixed tubular column, sand washing, when operation can automatic draining, be not necessarily to bleeder.
(5) pump has sand setting annular space and sand stop ring on, can prevent sand card and sand from burying, and lower pump is long-plunger short pump barrel structure, this
Body has sand control effect, therefore the pump upper and lower part energy sand control, adapts to the exploitation of sand output well.
(6) sand annular groove is deposited in design on short-plunger, into pump barrel and plunger fitting clearance in a small amount of fine sand can be by
It washes away and is expressed in annular groove, avoid pump barrel and plunger matching surface sand grains from being detained, pull plunger and pump barrel, cause sand card.
(7) the small pump in lower part is movable pump barrel, is not subject to load, and tail pipe load is all added on the box cupling outside movable pump barrel,
Therefore the pump has stronger bearing capacity.
The utility model provides a kind of subsurface pump for heavy oil, pumps top half mainly by short pump barrel, long pump barrel, short-plunger, limit
The compositions such as position pawl, sand stop ring, sand sediment pipe, upper delivery valve, lower delivery valve are the sand control structure with sand setting annular space and sand stop ring；Pump
Lower half portion is mainly made of long-plunger, movable pump barrel, annular oil inlet valve ball, oil inlet valve seat etc., is long-plunger activity short pump barrel
Sand control structure.
During plunger upward and downward, the long pump barrel short column plug structure for pumping top half plays sand control by sand stop ring and makees
With pump lower half portion uses the long-plunger short pump barrel structure for itself having sand control effect；Meanwhile the pump sand stop ring uses special knot
Structure design had both had sand-blocking function and had acted on but also with overcurrent, when pumping downlink, made pump that can generate downward hydraulic feedback power, gram
Take viscous crude resistance；Inlet valve designs on movable pump barrel, and runner is big, and oil flow resistance is small.The pump has pump efficiency height, sand controlling result
Well, bearing capacity is strong, realizes the forward and reverse well-flushing of fixed tubular column, sand washing, is suitable for the characteristics of sanding heavy crude oil well is exploited.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the structure chart of the utility model；
Fig. 2 is the short-plunger structural schematic diagram of the utility model；
Fig. 3 is the sand stop ring structural schematic diagram of the utility model；
In figure: connector 1；Sand stop ring 2；Pull rod 3；Upper delivery valve 4；Short-plunger 5；Lower delivery valve 6；Long-plunger 7；Annular oil inlet
Valve ball 8；Movable pump barrel 9；Upper box cupling 10；Elastic spacing pawl 11；Sand-precipitating tube 12；Support ring 13；Short pump barrel 14；Pump barrel box cupling 15；
Long pump barrel 16；Variable buckle box cupling 17；Oil inlet valve seat 18；Centering ring 19；Lower box cupling 20；Deposit sand annular groove 21；Flow-conveying groove 22；Reverse side
23；Front 24；Oil inlet outer tube 25.
Specific embodiment
Embodiment 1
As shown in Fig. 1 ~ 3, a kind of subsurface pump for heavy oil is made of assembly for plunger and pump barrel assembly, and pump barrel assembly is by sand-precipitating tube
12, short pump barrel 14, long pump barrel 16 and oil inlet outer tube 25 form, and are equipped with elastic spacing pawl 11 inside sand-precipitating tube 12, and 12 sets of sand-precipitating tube
In 14 outer wall of short pump barrel and form sand setting ring, short pump barrel 14 is connected to the long pump barrel 16 in one end of lower section, long 16 other end of pump barrel with
Oil inlet outer tube 25 is connected to, and the assembly for plunger is located inside pump barrel, and short-plunger 5 is equipped in the middle part of assembly for plunger, and short-plunger 5 is located at length
Inside pump barrel 16,5 outer surface of short-plunger, which is equipped with, deposits sand annular groove 21, and 5 both ends of short-plunger are equipped with upper delivery valve 4 and lower delivery valve 6,
4 top of upper delivery valve connect with pull rod 3, pull rod 3 equipped with sand stop ring 2, sand stop ring 2 be located at short pump barrel 14 and sand-precipitating tube 12 it
Between, lower 6 lower section of delivery valve is connect with long-plunger 7, and long-plunger 7 is located inside oil inlet outer tube 25, and activity is equipped in oil inlet outer tube 25
Pump barrel 9,9 sets of movable pump barrel is on long-plunger 7, and movable 9 upper end of pump barrel is equipped with annular oil inlet valve ball 8, this structure, on short-plunger 5
Sand annular groove is deposited in design, can be washed and is expressed in annular groove into a small amount of fine sand in pump barrel and plunger fitting clearance,
It prevents sand grains to be trapped in 5 contact surface of pump barrel and short-plunger, causes sand card referring to structural representation Fig. 2；Sand stop ring 2 can be in pull rod
Opposite sliding on 3, sand setting ring is formed between short pump barrel 14 and sand-precipitating tube 12 makes the sand grains in oil pipe under the action of sand stop ring 2
It cannot fall into pump barrel and slide and be deposited in sand setting annular space, when stopping taking out, sand stop ring 2 is pressed in 14 upper surface of short pump barrel always,
The sand grains of deposition cannot be introduced into pump barrel, so as to prevent sand from burying；Lower part inlet valve is annular valve arrangement, annular oil inlet valve ball 8
It is fixed on movable pump barrel 9, and is landed on oil inlet valve seat 18, movable pump barrel 9 is made in the frictional force and oil liquid pressure of long-plunger 7
Short distance is done under to pump, and opens and closes inlet valve.
Elastic spacing pawl 11 is equipped with inside sand-precipitating tube 12, the sand stop ring 2 is limited in the pawl of elastic spacing pawl 11 always
In region between head lower end and 14 upper surface of short pump barrel, thus structure, sand stop ring 2 can be on pull rods 3 with respect to sliding, in column
During plug assembly is gone into the well, sand stop ring 2 can enter elastic spacing by the elastic claw head of elastic spacing pawl 11 under rod head
11 lower part of pawl, pull rod 3 move up and down when, sand stop ring 2 be limited in always position-limited claw 11 elastic claw head lower end surface and short pump
In region between 14 upper surfaces of cylinder.
In preferred embodiment, 2 two sides of sand stop ring be for the conical surface, wherein the outer circle of one side is provided with flow-conveying groove 22, thus structure,
Sand stop ring 2 is designed as the different obverse and reverse sides of structure on two sides referring to structural representation Fig. 3, and reverse side 23 is designed as being provided with several overcurrents
The conical surface of slot 22 cooperates with 14 upper surface of short pump barrel downwards, and when sand stop ring falls in 14 upper surface of short pump barrel, pump barrel inner fluid is still
It can be connected to oil pipe inner fluid, enable to generate downward feedback force when plunger downlink, front 24 is designed as the conical surface of slotless, normally
In operation process, it can be slid into sand setting ring along the conical surface when sand grains falls in sand stop ring front in oil pipe, stop taking out when not playing roofbolt
When, sand stop ring can tightly be sat down in 14 upper surface of short pump barrel, prevent sand grains from entering pump barrel, and sand card, sand is caused to bury.
In preferred embodiment, the flow-conveying groove 22 is rectangular channel, dovetail groove or semi-circular groove, thus structure, can be according to using
Condition difference uses a variety of preferred embodiments.
In preferred embodiment, the quantity of flow-conveying groove 22 is one or more, and thus structure, can use according to territory of use's difference
A variety of preferred embodiments.
In preferred embodiment, sand stop ring 2 is provided with the one of flow-conveying groove 22 and cooperates downwards with 1414 upper surface of short pump barrel, thus ties
Structure, pump barrel inner fluid remain to be connected to oil pipe inner fluid, enable to generate downward feedback force when plunger downlink.
In preferred embodiment, annular oil inlet valve ball 8 is fixed on movable pump barrel 9, and is landed on oil inlet valve seat 18, inlet valve
Seat 18 is located inside oil inlet outer tube 25, thus structure, and lower part inlet valve is annular valve arrangement, and annular oil inlet valve ball 8 is fixed on work
It on dynamic pump barrel 9, and is landed on oil inlet valve seat 18, movable pump barrel 9 does short under frictional force and the oil liquid pressure effect of long-plunger 7
Distance pumps, and opens and closes inlet valve；Since inlet valve is on pump barrel, valve ball diameter is not by diameter of plunger
Limitation, ball valve diameter can increase, so that runner be made to increase, reduce viscous crude flow resistance.
In preferred embodiment, centering ring 21 is equipped with inside oil inlet outer tube 25, the activity pump barrel 9 passes through centering ring 21, thus
Structure, centering ring 21 can be oriented to the movement position of movable pump barrel 9.
In preferred embodiment, 21 shape of sand annular groove of depositing of 5 outer round surface of short-plunger is one or more, thus structure, can
A variety of preferred embodiments are used according to use condition difference.
Embodiment 2
It 1 further illustrates in conjunction with the embodiments, as shown in Fig. 1 ~ 3, in lower well operations, pump barrel assembly upper end is first connected into oil
Pipe, lower end union tail join with design position in tubing string tripping in oil well, then by the upper end of assembly for plunger and sucker rod
It connects, together with rod string in tripping in oil pipe.
In swabbing operation, assembly for plunger pumps in pump barrel assembly under the drive of sucker rod.
When up stroke, assembly for plunger uplink, upper and lower delivery valve is closed, and upper pump annular pump cavity volume increases, pressure decline,
Inlet valve is opened under the frictional force effect between pump intake pressure and plunger and pump barrel, and crude oil enters annular pump chamber.
When down stroke, assembly for plunger downlink, annular pump cavity volume reduces, and pressure increases, and inlet valve is in self gravity, long column
It is closed under frictional force and oil liquid differential pressure action between plug and short pump barrel.Meanwhile being acted on by annular pump chamber oil pressure, upper and lower delivery valve is beaten
It opens, oil pipe chamber is connected to pump chamber, generates the hydraulic feedback power for helping assembly for plunger downlink, and annular pump chamber Crude Oil is extruded, and is passed through
Upper and lower delivery valve 4/6 enters in 5 top oil pipe of short-plunger.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the technical solution that the protection scope of the utility model should be recorded with claim, the technical solution recorded including claim
The equivalents of middle technical characteristic are protection scope.Equivalent replacement i.e. within this range is improved, also in the utility model
Protection scope within.
Claims (9)
1. a kind of subsurface pump for heavy oil, it is characterized in that: being made of assembly for plunger and pump barrel assembly, pull rod (3) and short-plunger (5) are even
It connects, the long pump barrel (16) in short-plunger (5) and pump barrel assembly is slidingly sealed cooperation, passes through in short-plunger (5) equipped with fuel feeding
Access and two-stage check valve；
The bottom of short-plunger (5) is connect with long-plunger (7), and the outer wall of long-plunger (7) is equipped with movable pump barrel (9), activity pump
Cylinder (9) upper end is equipped with annular oil inlet valve ball (8)；
Centering ring (19) and oil inlet valve seat (18) are equipped in the oil inlet outer tube (25) of pump barrel assembly, centering ring (19) and activity pump
The outer wall composition of cylinder (9) is slidably connected, and oil inlet valve seat (18) and annular oil inlet valve ball (8) constitute annular one-way valve structures.
2. a kind of subsurface pump for heavy oil according to claim 1, it is characterized in that: being between long-plunger (7) and movable pump barrel (9)
It is full of cooperation, short-plunger (5) outer surface is equipped with and deposits sand annular groove (21).
3. a kind of subsurface pump for heavy oil according to claim 1, it is characterized in that: pump barrel assembly is by sand-precipitating tube (12), short pump barrel
(14), long pump barrel (16) and oil inlet outer tube (25) composition, sand-precipitating tube (12) is internal to be equipped with elastic spacing pawl (11), sand-precipitating tube (12)
It covers in short pump barrel (14) outer wall and forms sand setting ring, be equipped with sand stop ring (2) between short pump barrel (14) and elastic spacing pawl (11), gear
Sand ring (2) is slidably connected with pull rod (3).
4. a kind of subsurface pump for heavy oil according to claim 3, it is characterized in that: two sides are the conical surface to sand stop ring (2) up and down, wherein
Outer circle is provided with flow-conveying groove (22) on one side, and flow-conveying groove (22) is located at the one side contacted with short pump barrel (14).
5. a kind of subsurface pump for heavy oil according to claim 4, it is characterized in that: the flow-conveying groove (22) is rectangular channel, dovetail groove
Or semi-circular groove.
6. a kind of subsurface pump for heavy oil according to claim 3, it is characterized in that: the quantity of flow-conveying groove (22) is one or more.
7. a kind of subsurface pump for heavy oil according to claim 3 is equipped with support ring (13) it is characterized in that: being formed inside sand setting ring.
8. a kind of subsurface pump for heavy oil according to claim 1, it is characterized in that: being equipped with centering ring inside oil inlet outer tube (25)
(19), the movable pump barrel (9) passes through centering ring (19).
9. a kind of subsurface pump for heavy oil according to claim 1, it is characterized in that: the short-plunger (5) outer round surface deposits sand ring
Shape slot (21) shape is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116685.2U CN209557223U (en) | 2018-12-17 | 2018-12-17 | Subsurface pump for heavy oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116685.2U CN209557223U (en) | 2018-12-17 | 2018-12-17 | Subsurface pump for heavy oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209557223U true CN209557223U (en) | 2019-10-29 |
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ID=68302318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822116685.2U Active CN209557223U (en) | 2018-12-17 | 2018-12-17 | Subsurface pump for heavy oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209557223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538452A (en) * | 2018-12-17 | 2019-03-29 | 中船重工中南装备有限责任公司 | Subsurface pump for heavy oil |
-
2018
- 2018-12-17 CN CN201822116685.2U patent/CN209557223U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538452A (en) * | 2018-12-17 | 2019-03-29 | 中船重工中南装备有限责任公司 | Subsurface pump for heavy oil |
| CN109538452B (en) * | 2018-12-17 | 2024-02-09 | 中船重工中南装备有限责任公司 | Thickened oil pump |
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