CN113530518A - Multi-stage autorotation centrifugal sand-proof sealed oil-gas separator - Google Patents
Multi-stage autorotation centrifugal sand-proof sealed oil-gas separator Download PDFInfo
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- CN113530518A CN113530518A CN202111027154.6A CN202111027154A CN113530518A CN 113530518 A CN113530518 A CN 113530518A CN 202111027154 A CN202111027154 A CN 202111027154A CN 113530518 A CN113530518 A CN 113530518A
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- 239000007788 liquid Substances 0.000 claims abstract description 254
- 239000004576 sand Substances 0.000 claims abstract description 107
- 239000000725 suspension Substances 0.000 claims abstract description 59
- 238000000926 separation method Methods 0.000 claims abstract description 51
- 230000002265 prevention Effects 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 70
- 238000010168 coupling process Methods 0.000 claims description 70
- 238000005859 coupling reaction Methods 0.000 claims description 70
- 238000012856 packing Methods 0.000 claims description 47
- 238000004804 winding Methods 0.000 claims description 17
- 239000003129 oil well Substances 0.000 abstract description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 210000002445 nipple Anatomy 0.000 abstract description 11
- 238000005086 pumping Methods 0.000 abstract description 10
- 238000000605 extraction Methods 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 209
- 230000001681 protective effect Effects 0.000 description 27
- 239000010985 leather Substances 0.000 description 11
- 238000007872 degassing Methods 0.000 description 9
- 239000010779 crude oil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000429 assembly Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000241602 Gossypianthus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
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- General Life Sciences & Earth Sciences (AREA)
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- Centrifugal Separators (AREA)
Abstract
The invention discloses a multi-stage autorotation centrifugal sand prevention sealing oil-gas separator which comprises an upper suspension assembly, wherein the tail end of the upper suspension assembly is connected with an exhaust liquid separation assembly, a separator liquid passing and oil feeding assembly, a cup packer assembly and a separator sand prevention liquid feeding oil-gas separation assembly. The separator provided by the invention solves the problems that the existing separator is low in oil well pumping efficiency and low in oil well yield caused by the fact that the pumping efficiency of an oil well pump is often in a gas lock and semi-gas lock small state under the condition that the constant pressure discharge and exhaust of associated gas in an oil sleeve annulus is not smooth and the gas-oil separation ratio is low in a gas-oil large conventional oil well with a high gas-oil ratio in a high dissolved gas oil production zone, particularly a gas large horizontal oil well is seriously influenced by gas. The annular space constant-pressure discharge device is suitable for associated oil casings, the formation pressure is preserved, the stable production period is prolonged, the early recovery rate is improved, the pump efficiency is improved, the yield of gas-oil wells is improved, the oil well is protected from sand blocking due to the secondary sand setting pipe nipple, the working time of the oil pump is prolonged, and the economic benefit of oil extraction is improved.
Description
Technical Field
The invention belongs to the technical field of oil field underground oil extraction tools, and relates to a multi-stage autorotation centrifugal sand prevention sealing oil-gas separator.
Background
Aiming at the oil extraction process of the oil field, the oil sleeve annulus associated gas oil extraction wellhead is discharged at low constant pressure and is merged into a high-pressure oil pipeline or an associated recovery pipeline of the oil extraction wellhead, the pressure shortage of the oil well stratum is slowed down, the long-term stable production of an oil well is facilitated, the produced oil gas is conveyed to an oil accumulating (transferring) station by utilizing the gas oil displacement effect and the oil pressure together, and then water, oil and gas are separated. Meanwhile, the discharge and the combustion of the associated gas in the well site are eliminated, the atmospheric pollution is reduced, and the blue sky is protected; in the process, because the low-pressure discharge pressure of the oil sleeve annulus associated gas wellhead is greater than that of oil pressing oil, the associated gas in the sleeve annulus is not smoothly discharged, so that an oil well pump of a part of gas large oil wells is influenced by the associated gas, and in addition, the oil well containing the associated gas is in a dissolved gas oil extraction block, the gas-oil ratio of the gas large conventional oil well, especially the gas large horizontal well oil well, is high, the associated gas seriously influences the oil well pump, so that the pumping efficiency is low, the gas lock is caused, and the yield of the oil well with low pumping efficiency is low. In the high solution gas oil production area, the oil well pump is generally influenced by gas and has low pump efficiency, and the original gas-oil ratio can be more than 100: 1, the gas-oil ratio of an average shaft is 300-400 because of the reduction of formation pressure in actual oil extraction: 1, individual oil production wells, the gas-oil ratio of a shaft is 500-600: 1, the working fluid level of the oil well is very high, the oil well belongs to a high-yield well, but the pumping efficiency is low due to the influence of gas, the oil well yield is low, oil can not be pumped out, and the sleeve pressure is greater than the oil pressure, so that the low-pressure exhaust of the well mouth is not smooth, and the oil well pump is more remarkably influenced by gas. The oil-gas separation ratio of the conventional underground oil-gas separator is low, and the oil-gas separation effect in the well is poor; in a high-solution gas production area, an oil well pump is generally seriously interfered by associated gas, the oil well pump is in an air lock state or a semi-air lock state, and the influence of pumping efficiency gas is serious, so that the yield of an oil well with low pumping efficiency is low.
Disclosure of Invention
The invention aims to provide a multistage autorotation centrifugal sand prevention sealing oil-gas separator, which solves the problems that the existing oil-gas separator in a well has low gas-oil separation ratio, and a conventional oil production well with high gas-oil ratio of a high dissolved gas oil production block has serious influence on pump efficiency by gas and gas lock, so that the oil pumping pump efficiency is low and the oil well yield is low under the condition that associated gas in an oil sleeve annulus is not smoothly exhausted.
The technical scheme includes that the multi-stage autorotation centrifugal sand prevention sealing oil-gas separation device comprises an upper suspension assembly, and the tail end of the upper suspension assembly is sequentially connected with an exhaust liquid separation assembly, a separator liquid passing and oil feeding assembly, a cup packer assembly and a separator sand prevention liquid feeding oil-gas separation assembly.
The present invention is also characterized in that,
the upper suspension assembly comprises an upper suspension outer barrel, an upper suspension shaft is arranged in the upper suspension outer barrel, a clamp spring, an anti-tripping rubber ring, an adjusting nut, a bearing assembly and a first oil seal are sequentially arranged between the upper suspension outer barrel and the upper suspension shaft from top to bottom, and the clamp spring is clamped with the inner wall of the upper suspension outer barrel.
The bearing assembly is 2 groups, and each group of bearing assemblies comprises a thrust bearing, and the bottom annular plane of the thrust bearing is in contact connection with the annular surface of the rolling bearing.
The exhaust liquid separation assembly comprises a liquid discharge pipe, the top of the liquid discharge pipe is connected with the bottom of the upper suspension outer barrel, one end of the liquid discharge pipe, which is close to the upper suspension outer barrel, is provided with a plurality of discharge holes, the bottom of the liquid discharge pipe is sequentially connected with a plurality of groups of joints and a blind pipe at intervals, a first upper oil pipe is arranged in the liquid discharge pipe, the outer wall of the first upper oil pipe is uniformly provided with first helical blades, the top of the first upper oil pipe is connected with an upper suspension shaft, the bottom of the first upper oil pipe is sequentially connected with a plurality of groups of third oil inlet shafts and second upper oil pipes at intervals, the third oil inlet shafts are arranged in the joints, the outer wall of each third oil inlet shaft is sleeved with a bearing, the outer wall of each bearing is sleeved with a helical lead bearing seat, the second upper oil pipes are arranged in the blind pipe, and the outer wall of each second upper oil pipe is uniformly provided with fourth helical blades;
spiral helical pitch bearing frame includes body c, all with be provided with a plurality of helical blade d on the outer wall of body c, on the inner wall of body c and with the position that helical blade d corresponds be provided with logical groove, helical blade d and the inner wall threaded connection who connects.
The separator liquid and oil passing and feeding assembly comprises a coupling, an oil inlet hole is formed in the side wall of the coupling, the top of the coupling is connected with a blind pipe, a first oil feeding shaft is arranged inside the coupling, one end of the first oil feeding shaft is connected with a second oil feeding pipe, the other end of the first oil feeding shaft corresponds to the position of the oil inlet hole, a bearing is sleeved on the outer wall of the other end of the first oil feeding shaft, a second oil seal is arranged at the top of the bearing, a clamp spring is arranged at the top of the second oil seal, an oil feeding spiral liquid passing and secondary sand settling bearing seat is sleeved on the outer wall of the bearing, the clamp spring is clamped with the inner wall of the oil feeding spiral liquid passing and secondary sand settling bearing seat, and the oil feeding spiral liquid passing and secondary sand settling bearing seat is located inside the coupling;
the oil inlet spiral liquid passing and secondary sand setting bearing seat comprises a bearing seat body, a plurality of spiral blades a are uniformly arranged on the side wall of the bearing seat body, a through hole is formed in one spiral blade a, the through hole is matched with an oil inlet hole, and the spiral blade a is in threaded connection with the inner wall of a coupling;
the bottom of the bearing seat body is connected with a secondary sand-settling pipe nipple, and the bottom of the secondary sand-settling pipe nipple is provided with a conical plug.
The packing cup packer assembly comprises an upper joint, the top of the upper joint is connected with an oil pipe connecting short section, the oil pipe connecting short section is connected with a coupling, the bottom of the upper joint is connected with one end of a central pipe a of the packing cup packer, a centralizer is sleeved on the outer wall of the central pipe a of the packing cup packer and positioned above a packing cup of the packing cup packer, and the other end of the central pipe a of the packing cup packer is connected with a lower joint of the packer;
the opening of the packing cup packer is downward, and the end surface of the lower joint of the packer tightly props against the bottom of the packing cup packer.
The separator sand control liquid inlet oil-gas separation assembly comprises a liquid inlet pipe reducing coupling, the top of the liquid inlet pipe reducing coupling is connected with the lower connector of the packer, the bottom of the liquid inlet pipe reducing coupling is connected with one end of a liquid inlet pipe, and the other end of the liquid inlet pipe is connected with the lower connector;
the sand control pipe is sleeved outside the liquid inlet pipe, the protective pipe is sleeved outside the sand control pipe, a plurality of liquid inlet holes are formed in the liquid inlet pipe, the wire winding is welded on the side wall of the sand control pipe, screw threads are arranged at two ends of the sand control pipe and connected with the wire winding, and a plurality of protective pipe liquid inlet holes are formed in the protective pipe;
a suspension hollow shaft is arranged inside the liquid inlet pipe reducing coupling, a bearing b is sleeved on the outer wall of the suspension hollow shaft, a first spiral liquid passing bearing seat is sleeved on the outer wall of the bearing b, a clamp spring is arranged below the bearing b, and the clamp spring is clamped with the inner wall of the first spiral liquid passing bearing seat;
a central pipe is arranged in the liquid inlet pipe, second helical blades are uniformly arranged on the outer wall of the central pipe, and the top of the central pipe is connected with the bottom of the suspended hollow shaft;
a tail shaft is arranged in the lower joint, a bearing c is sleeved on the outer wall of the tail shaft, a first spiral liquid passing bearing seat is sleeved on the outer wall of the bearing c, a clamp spring is arranged above the bearing c and clamped with the inner wall of the first spiral liquid passing bearing seat, and the top of the tail shaft is connected with the bottom of the central pipe;
the first spiral liquid passing bearing seat comprises a body a, a plurality of spiral blades b are uniformly arranged on the outer wall of the body a, and the spiral blades b are in threaded connection with the inner wall of the liquid inlet pipe reducing coupling.
The exhaust liquid separation assembly comprises a liquid drainage pipe, the top of the liquid drainage pipe is connected with the bottom of the upper suspension outer barrel, a plurality of discharge holes are formed in one end, close to the upper suspension outer barrel, of the liquid drainage pipe, a first oil feeding pipe is arranged inside the liquid drainage pipe, first spiral blades are evenly arranged on the outer wall of the first oil feeding pipe, and the top of the first oil feeding pipe is connected with the upper suspension shaft.
The separator overfluid and oil inlet assembly comprises a coupling, the top of the coupling is connected with a liquid discharge air pipe, a first oil inlet shaft is arranged in the coupling, the top of the first oil inlet shaft is connected with a first oil inlet pipe, the outer wall of the first oil inlet shaft is sleeved with a bearing a, the outer wall of the bearing a is sleeved with a spiral lead bearing seat, the top of the bearing a is provided with a clamp spring, and the clamp spring is clamped with the spiral lead bearing seat;
spiral helical pitch bearing frame includes body c, all with be provided with a plurality of helical blade d on the outer wall of body c, on the inner wall of body c and with the position that helical blade d corresponds be provided with logical groove, helical blade d and the inner wall threaded connection of coupling.
The packing cup packer assembly comprises an upper joint, the top of the upper joint is connected with an oil pipe connecting short section, the oil pipe connecting short section is connected with a coupling, the bottom of the upper joint is connected with one end of a central pipe of the packing cup packer, a centralizer is sleeved on the outer wall of the central pipe of the packing cup packer and positioned above a packing cup of the packing cup packer, and the other end of the central pipe of the packing cup packer is connected with a lower joint of the packer;
the opening of a packing cup of the packing cup packer is downward, and the end surface of a lower joint of the packer tightly props against the bottom of the packing cup packer;
the centralizer is internally provided with a third oil feeding pipe, third helical blades are uniformly arranged on the outer wall of the third oil feeding pipe, and the top of the third oil feeding pipe is connected with the first oil inlet shaft.
The separator sand control liquid inlet oil-gas separation assembly comprises a liquid inlet pipe reducing coupling, the top of the liquid inlet pipe reducing coupling is connected with the lower connector of the packer, the bottom of the liquid inlet pipe reducing coupling is connected with one end of a liquid inlet pipe, and the other end of the liquid inlet pipe is connected with the lower connector;
the sand control pipe is sleeved outside the liquid inlet pipe, the protective pipe is sleeved outside the sand control pipe, a plurality of liquid inlet holes are formed in the liquid inlet pipe, the wire winding is welded on the side wall of the sand control pipe, screw threads are arranged at two ends of the sand control pipe and connected with the wire winding, and a plurality of protective pipe liquid inlet holes are formed in the protective pipe;
a second oil inlet shaft is arranged inside the liquid inlet pipe reducing coupling, the outer wall of the second oil inlet shaft is sleeved with a bearing b, the outer wall of the bearing b is sleeved with a second spiral liquid passing bearing seat, a clamp spring is arranged below the bearing b, and the clamp spring is clamped with the inner wall of the second spiral liquid passing bearing seat; the top of the second oil inlet shaft is connected with a third oil feeding pipe;
the second spiral liquid passing bearing seat comprises a body b, a plurality of spiral blades c are uniformly arranged on the outer wall of the body b, and the spiral blades c are in threaded connection with the inner wall of the liquid inlet pipe reducing coupling;
a central pipe is arranged in the liquid inlet pipe, second helical blades are uniformly arranged on the outer wall of the central pipe, and the top of the central pipe is connected with the bottom of a second oil inlet shaft;
a third oil inlet shaft is arranged in the joint, the outer wall of the third oil inlet shaft is sleeved with a bearing c, the outer wall of the bearing c is sleeved with a first spiral liquid passing bearing seat, the top of the third oil inlet shaft is connected with the bottom of the central pipe, the bottom of the joint is sequentially connected with a plurality of groups of blind pipes and second joints at intervals, the bottom of the third oil inlet shaft is sequentially connected with a plurality of groups of second oil feeding pipes and tail shafts at intervals, the second oil feeding pipes are arranged in the blind pipes, the outer wall of each second oil feeding pipe is uniformly provided with fourth spiral blades, the tail shafts are arranged in the second joints, the outer wall of each tail shaft is sleeved with the bearing c, the outer wall of each bearing c is sleeved with the first spiral liquid passing bearing seat, and the spiral blades b are in threaded connection with the inner wall of the joint;
the first spiral liquid passing bearing seat comprises a body a, and a plurality of spiral blades b are uniformly arranged on the outer wall of the body a.
The beneficial effect of the invention is that,
(1) the multi-stage autorotation centrifugal sand prevention sealing oil and gas separator is provided with the secondary sand setting pipe nipple which plays a secondary sand setting role before oil enters an oil pump, so that an oil well pump is better protected from sand blocking, and in addition, the conical plug of the secondary sand setting pipe nipple plays a shunting role on passing liquid, so that the liquid smoothly and quickly passes through the conical plug.
(2) The multi-stage autorotation centrifugal sand-prevention sealing oil-gas separation device effectively removes a large gas production well in a high dissolved gas production area, particularly a large gas horizontal production well with high gasoline ratio, and discharges and puts down the associated gas wellhead at low pressure and constant pressure in an oil sleeve annulus, thereby effectively preserving the formation pressure, realizing long-term stable production, improving the recovery ratio, protecting the blue sky, reducing the atmospheric pollution, simultaneously removing the interference of gas on the pump efficiency and the gas lock of an oil pump, improving the oil pumping efficiency, improving the yield of a single well and improving the economic benefit of oil extraction.
Drawings
FIG. 1 is a schematic structural diagram of an oil-gas separator in embodiment 1 of the multi-stage autorotation centrifugal sand prevention seal of the invention;
FIG. 2 is a schematic structural diagram of an oil-gas separator of embodiment 2 of the multi-stage autorotation centrifugal sand prevention seal of the invention;
FIG. 3 is a schematic structural view of a liquid discharge gas pipe in the multi-stage autorotation centrifugal sand prevention seal oil-gas separator of the present invention;
FIG. 4 is a schematic structural view of a liquid inlet pipe in the multi-stage autorotation centrifugal sand prevention seal oil-gas separator;
FIG. 5 is a schematic structural view of a sand prevention pipe in the multi-stage autorotation centrifugal sand prevention packing oil-gas separator of the present invention;
FIG. 6 is a schematic structural diagram of a protective pipe in the multi-stage autorotation centrifugal sand prevention seal oil-gas separator of the invention;
FIG. 7 is a schematic structural view of an oil-taking spiral liquid-passing and secondary sand-settling bearing seat in the multi-stage autorotation centrifugal sand-prevention sealing oil-gas separator of the invention;
FIG. 8 is a schematic structural view of a spiral lead bearing seat in the multi-stage autorotation centrifugal sand prevention seal oil-gas separator of the present invention;
FIG. 9 is a schematic structural diagram of a first spiral liquid passing bearing seat in the multi-stage autorotation centrifugal sand prevention seal oil-gas separator of the invention;
FIG. 10 is a schematic structural view of a second spiral liquid passing bearing seat in the multi-stage autorotation centrifugal sand prevention seal oil-gas separator.
In the figure, 1, an upper suspension outer cylinder, 2, a coupling, 3, an upper joint, 4, a packer lower joint, 5, a liquid discharge air pipe, 6, a liquid inlet pipe, 7, a joint, 8, a cup packer, 9, a liquid inlet pipe reducing coupling, 10, an upper suspension shaft, 11, a first oil feeding pipe, 12, a first spiral blade, 13, a first joint, 14, a first oil feeding shaft, 15, a secondary sand settling pipe short section, 16, a plug, 17, a centralizer, 18, a second oil feeding shaft, 19, a central pipe, 20, a tail shaft, 21, a rolling bearing, 22, a first oil seal, 23, a thrust bearing, 24, an adjusting nut, 25, an anti-tripping rubber ring, 26, a snap spring, 27, a second oil seal, 28, 29, an oil feeding spiral liquid passing and secondary sand settling bearing seat, 30, a first spiral liquid passing bearing seat, 31, a second spiral liquid passing bearing seat, 32, an oil inlet hole, 33, a connecting oil pipe short section, 34, a third oil feeding pipe, 35. a spiral lead bearing seat, 36, a sand control pipe, 37, a protective pipe, 38, a second spiral blade and 39, a third spiral blade; 40. a blind pipe; 41. a suspension hollow shaft, 42, a second joint, 43, a fourth helical blade, 44, a third oil inlet shaft, 45, a second oil feeding pipe;
5-1 of a discharge hole, 6-1 of a liquid inlet hole, 29-1 of a helical blade a, 29-2 of a through hole, 29-3 of a bearing seat body, 30-1 of a body a, 30-2 of a helical blade b, 31-1 of a body b, 31-2 of a helical blade c, 35-1 of a through groove, 35-2 of a helical blade d, 35-3 of a body c, 36-1 of a winding wire, and 37-1 of a protective pipe liquid inlet hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
The invention provides a multistage autorotation centrifugal sand prevention sealing oil-gas separator which has a structure shown in figure 1 and comprises an upper suspension assembly, wherein the tail end of the upper suspension assembly is sequentially connected with an exhaust liquid separation assembly, a separator liquid passing and oil feeding assembly, a cup packer assembly and a separator sand prevention liquid feeding oil-gas separation assembly.
The upper suspension assembly comprises an upper suspension outer cylinder 1, an upper suspension shaft 10 is arranged in the upper suspension outer cylinder 1, a clamp spring 26 is sequentially arranged between the upper suspension outer cylinder 1 and the upper suspension shaft 10 from top to bottom, an anti-tripping rubber ring 25, an adjusting nut 24, 2 groups of bearing assemblies, a first oil seal 22, the clamp spring 26 is clamped with the inner wall of the upper suspension outer cylinder 1, each group of bearing assemblies comprises a thrust bearing 23, the bottom annular plane of the thrust bearing 23 is in contact with the annular surface of a rolling bearing 21, a boss is arranged on the inner wall of the upper suspension outer cylinder 1 and below the first oil seal 22, and the boss is used for limiting the position of the first oil seal 22.
The exhaust gas-liquid separation assembly comprises a liquid discharge pipe 5, the top of the liquid discharge pipe 5 is connected with the bottom of an upper suspension outer cylinder 1, as shown in fig. 3, one end of the liquid discharge pipe 5, which is close to the upper suspension outer cylinder 1, is provided with a plurality of discharge holes 5-1, the bottom of the liquid discharge pipe 5 is sequentially connected with two groups of joints 7 and a blind pipe 40 at intervals, a first oil feed pipe 11 is arranged in the liquid discharge pipe 5, the outer wall of the first oil feed pipe 11 is uniformly provided with first helical blades 12, the top of the first oil feed pipe 11 is connected with an upper suspension shaft 10, the bottom of the first oil feed pipe 11 is sequentially connected with a plurality of groups of third oil feed shafts 44 and second oil feed pipes 45 at intervals, the third oil feed shafts 44 are arranged in the joints 7, the outer wall of the third oil feed shafts 44 is sleeved with bearings, the outer wall of the bearings is sleeved with helical lead bearing seats 35, the second oil feed pipes 45 are arranged in the blind pipe 40, the outer wall of the second oil feed pipes 45 is uniformly provided with fourth helical blades 43, a clamp spring 26 is arranged above the bearing 28, the clamp spring 26 is clamped with the inner wall of the spiral lead bearing seat 35, and fourth helical blades 43 are uniformly arranged on the outer wall of the first oil inlet shaft 14 and at positions corresponding to the blind pipes 40;
the spiral lead bearing seat 35 comprises a body c35-3, a plurality of spiral blades d35-2 are arranged on the outer wall of the body c35-3, a through groove 35-1 is arranged on the inner wall of the body c35-3 and at a position corresponding to the spiral blades d35-2, and the spiral blades d35-2 are in threaded connection with the inner wall of the joint 7.
The separator liquid and oil passing and feeding assembly comprises a coupling 2, an oil inlet hole 32 is formed in the side wall of the coupling 2, the top of the coupling 2 is connected with a blind pipe 40, a first oil inlet shaft 14 is arranged inside the coupling 2, one end of the first oil inlet shaft 14 is connected with a second oil feeding pipe 45, the other end of the first oil inlet shaft 14 corresponds to the position of the oil inlet hole 32, a bearing 28 is sleeved on the outer wall of the other end of the first oil inlet shaft 14, a second oil seal 27 is arranged at the top of the bearing 28, a clamp spring 26 is arranged at the top of the second oil seal 27, an oil inlet spiral liquid passing and secondary sand settling bearing seat 29 is sleeved on the outer wall of the bearing 28, the clamp spring 26 is clamped with the inner wall of the oil inlet spiral liquid passing and secondary sand settling bearing seat 29, the oil inlet spiral liquid passing and secondary sand settling bearing seat 29 is located inside the coupling 2, a clamping table is arranged at the bottom of the inner wall of the coupling 2 and used for limiting the position of the oil inlet spiral liquid passing and secondary sand settling bearing seat 29, a spiral liquid passing channel is formed between the oil inlet spiral liquid passing and secondary sand setting bearing seat 29 and the coupling 2, and the top of the third oil inlet shaft 44 is connected with the first upper oil pipe 11 through the first joint 13;
as shown in fig. 7, the oil-feeding spiral liquid-passing and secondary sand-settling bearing seat 29 comprises a bearing seat body 29-3, the side wall of the bearing seat body 29-3 is uniformly provided with 3 spiral blades a29-1, a spiral liquid-passing channel is formed between two adjacent spiral blades a29-1 and is used as a flow channel of fluid, the spiral blades a29-1 are in threaded connection with the inner wall of the coupling 2, one of the spiral blades a29-1 is provided with a through hole 29-2, the shape of the through hole 29-2 is the same as that of the spiral blade a29-1 and is spiral, the through hole 29-2 is the same as that of the oil-feeding hole 32, the bottom of the bearing seat body 29-3 is connected with a secondary sand-settling pipe nipple 15, the bottom of the secondary sand-settling pipe nipple 15 is provided with a tapered plug 16 for shunting, the secondary sand-settling pipe plug 15 is used for depositing sand, and a fluid flow channel is reserved between the first oil inlet shaft 14 and the secondary sand settling pipe nipple 15.
The packing cup packer assembly comprises an upper joint 3, the top of the upper joint 3 is connected with an oil pipe connecting short section 33, the oil pipe connecting short section 33 is connected with a coupling 2, the bottom of the upper joint 3 is connected with one end of a central pipe of a packing cup packer 8, the outer wall of the central pipe of the packing cup packer 8 is sleeved with a centralizer 17, the centralizer 17 is positioned above the packing cup of the packing cup packer 8, the other end of the central pipe of the packing cup packer 8 is connected with a packer lower joint 4, the opening of the packing cup packer 8 is downward, the annular end surface of the packer lower joint 4 is tightly propped against the bottom of the packing cup packer 8, centralizing blocks in the centralizer 17 are distributed along the circumference 4 in an equal distribution manner, the outer wall of the centralizing block in the centralizer is contacted with the inner wall of a well, the centralizer 17 is sequentially provided with a centralizing block upper clamp ring, a centralizing block clamp spring groove and a centering block lower clamp ring from top to bottom, an arc clamp spring groove is arranged in the centralizing block clamp groove, righting the contact of piece jump ring groove setting up in righting the piece inboard with the jump ring, the centralizer leans on righting the piece under spring force effect, gathers the packing cup packer in the well, makes packing cup outer wall and well inner wall extrusion atress even, improves the packing cup in the shutoff effect of well, according to shutoff pressure needs, the packing cup of packing cup packer can be established to two, is provided with the sealing washer between two packing cups.
The sand-prevention liquid-feeding oil-gas separation assembly of the separator comprises a liquid-feeding pipe reducing coupling 9, the top of the liquid-feeding pipe reducing coupling 9 is connected with a lower joint 4 of the packer, the bottom of the liquid-feeding pipe reducing coupling 9 is connected with one end of a liquid-feeding pipe 6, and the other end of the liquid-feeding pipe 6 is connected with a joint 7;
a sand control pipe 36 is sleeved outside the liquid inlet pipe 6, a protective pipe 37 is sleeved outside the sand control pipe 36, as shown in figure 4, a plurality of liquid inlet holes 6-1 are formed in the liquid inlet pipe 6, as shown in figure 5, wire windings 36-1 are welded on the side wall of the sand control pipe 36, the gap between the wire windings 36-1 is 0.2mm-0.25mm, screw threads are arranged at two ends of the sand control pipe 36 and are connected with the wire windings 36-1, as shown in figure 6, a plurality of protective pipe liquid inlet holes 37-1 are formed in the protective pipe 37, the length of the protective pipe liquid inlet holes 37-1 formed in the protective pipe 37 is equal to the length of the wire windings of the sand control pipe 36, the length of the protective pipe liquid inlet holes 37-1 formed in the protective pipe 37 is equal to the length of the liquid inlet holes 6-1 formed in the liquid inlet pipe 6, the inner diameter of the protective pipe 37 is greater than the outer diameter of the sand control pipe 36 by 6-10mm, the liquid inlet pipe 6, the sand control pipe 36, The protective pipe 37 has the function of sand prevention;
a hanging hollow shaft 41 is arranged inside the liquid inlet pipe reducing coupling 9, the hanging hollow shaft 41 and the first oil inlet shaft 14 have the same diameter and are coaxial, the top end of the second oil inlet shaft 18 is open, the outer wall of the second oil inlet shaft 18 is sleeved with a bearing b, the outer wall of the bearing b is sleeved with a first spiral liquid passing bearing seat 30, a clamp spring 26 is arranged below the bearing b, and the clamp spring 26 is clamped with the inner wall of the first spiral liquid passing bearing seat 30;
a central pipe 19 is arranged in the liquid inlet pipe 6, second helical blades 38 are uniformly arranged on the outer wall of the central pipe 19, and the top of the central pipe 19 is connected with the bottom of a suspended hollow shaft 41;
a tail shaft 20 is arranged in the joint 7, a bearing c is sleeved on the outer wall of the tail shaft 20, a first spiral liquid passing bearing seat 30 is sleeved on the outer wall of the bearing c, a clamp spring 26 is arranged above the bearing c, the clamp spring 26 is clamped with the inner wall of the first spiral liquid passing bearing seat 30, and the top of the tail shaft 20 is connected with the bottom of the central pipe 19;
as shown in FIG. 9, the first spiral liquid passing bearing seat 30 comprises a body a30-1, 3 spiral blades b30-2 are uniformly arranged on the outer wall of the body a30-1, a spiral liquid passing groove is formed between adjacent spiral blades b30-2 to serve as a fluid flowing channel, and the spiral blades b30-2 are in threaded connection with the inner wall of the liquid inlet pipe reducing coupling 9.
The spiral directions of the first spiral blade 12, the second spiral blade 38, the spiral blade a29-1, the spiral blade b30-2 and the spiral blade d35-2 are the same.
The working principle of the multi-stage autorotation centrifugal sand prevention seal oil-gas separator is as follows: in a high solution gas production area, a separator liquid passing and oil feeding assembly and a leather cup packer assembly are arranged between a separator sand control liquid inlet oil-gas separation assembly and an exhaust liquid separation assembly, the separator is divided into an upper part and a lower part by the leather cup packer, the packer can be separated in the installation under a pump in the well and is used for packing and separating the upper oil sleeve annular space and the lower oil sleeve annular space in the well, the two spaces are communicated with each other, the pressure difference is utilized to make the vertical flow, crude oil mixed liquid entering the separator sand control liquid inlet oil-gas separation assembly through a liquid inlet pipe 6 is rotated and ascended through a first spiral liquid passing bearing seat 30 under the action of an oil pump and a ground pressure, the liquid in the whole sand control liquid inlet oil-gas separation assembly is driven to rotate, meanwhile, a hanging hollow shaft 41, a central pipe 19 and a tail shaft 20 are driven to rotate together in an accelerating way, and the liquid is rotated through the first spiral liquid passing bearing seat 30, the oil-gas separation assembly enters a packer suspension hollow shaft in an upward rotating mode, and rapidly rotates to pass through an oil inlet spiral liquid passing and secondary sand setting bearing seat 29 after being shunted by a plug 16 at the bottom of a secondary sand setting pipe nipple 15, an outer wall spiral liquid passing groove, a crude oil mixed liquid rapidly rotates upward to pass through a spiral lead bearing seat 35, so that the liquid added in the cavity of the whole exhaust liquid separation assembly is driven to rapidly rotate upward, meanwhile, an upper suspension shaft 10, a first spiral blade 12, a first oil feeding pipe 11, a first spiral blade 12, a first joint 13, a third oil feeding shaft 44 and a second oil feeding pipe 45 are driven, a fourth spiral blade 43 is driven, the whole oil feeding central pipe 14 rotates together with the oil fed, centrifugal degassing is generated due to liquid-gas quality difference, the spiral blade blocks cotton flower degassing, so that oil and gas are fully separated, the gas is accelerated upward, and the oil enters an oil sleeve annulus to go upward through a separator 5-1 outlet on a liquid discharge pipe 5, discharging at low pressure at the wellhead; the crude oil rotates upwards by the inner wall of the liquid discharge air pipe 5, is discharged out of the separator through the discharge hole 5-1, flows downwards to the oil inlet hole 32, enters the first oil inlet shaft 14, flows upwards out of the separator and enters the oil well pump, gravity settlement degassing is generated in the process, and oil and gas are more fully separated.
Through the first spiral that sets up, the liquid bearing frame is crossed to the oil feed spiral, and secondary sand setting bearing frame 29, spiral helical pitch bearing frame 35 forms multistage spiral and crosses liquid passageway and spiral angle crescent to suitably reduce spiral and cross liquid passageway cross-section, make the former oil mixing liquid form the efflux at rotatory in-process of going upward, under oil-well pump suction and formation pressure are the power source, the liquid of forcing to go upward rotates with higher speed when passing through the spiral passageway, thereby increase centrifugal force, increase oil-gas separation ratio (degasification ratio).
The included angle between the spiral inclination cutting of the spiral blade b30-2, the spiral blade a29-1 and the spiral blade d35-2 and the horizontal line is 20-60 degrees, different angle adjustment is carried out according to the gas-oil ratio change in the well, the horizontal included angle of the spiral inclination along the liquid flow direction is changed from big to small, the inclination is increased, the rotating speed is gradually increased, the centrifugal force is increased, the gas-oil separation ratio (degassing ratio) is increased, and the oil-gas separation of the oil liquid entering the pump in the well is more sufficient and thorough.
Secondary sand setting pipe nipple 15 is the secondary sand setting effect before fluid gets into the oil pump, prevents to the oil-well pump that the sand card plays better guard action, and secondary sand setting pipe nipple 15 toper end cap sets up in addition, plays the reposition of redundant personnel effect to liquid, makes liquid smoothly pass through with higher speed.
Example 2
The invention provides a multistage autorotation centrifugal sand prevention sealing oil-gas separator which has a structure shown in figure 2 and comprises an upper suspension assembly, wherein the tail end of the upper suspension assembly is sequentially connected with an exhaust liquid separation assembly, a separator liquid passing and oil feeding assembly, a cup packer assembly and a separator sand prevention liquid feeding oil-gas separation assembly.
Go up and hang the assembly including hanging urceolus 1 on, it is provided with hanging axle 10 to hang in the urceolus 1 on, from last jump ring 26 that has set gradually under to between hanging urceolus 1 and the last hanging axle 10 on the top, anticreep detains rubber circle 25, adjusting nut 24, 2 group's bearing subassembly, first oil blanket 22, jump ring 26 and the inner wall joint of hanging urceolus 1 on, every group bearing subassembly includes thrust bearing 23, the annular face of antifriction bearing 21 is connected in thrust bearing 23's the contact of bottom annular plane, the inner wall of hanging urceolus 1 on and the below that is located first oil blanket 22 are provided with the boss, the boss is used for hanging the axle 10 and plays supporting role.
The exhaust liquid separation assembly comprises a liquid discharge air pipe 5, the top of the liquid discharge air pipe 5 is connected with the bottom of the upper suspension outer cylinder 1, as shown in fig. 3, one end of the liquid discharge air pipe 5, which is close to the upper suspension outer cylinder 1, is provided with a plurality of discharge holes 5-1, a first upper oil pipe 11 is arranged inside the liquid discharge air pipe 5, the outer wall of the first upper oil pipe 11 is uniformly provided with first helical blades 12, and the top of the first upper oil pipe 11 is connected with an upper suspension shaft 10.
The separator liquid and oil passing assembly comprises a coupling 2, the top of the coupling 2 is connected with a liquid discharge air pipe 5, a first oil inlet shaft 14 is arranged in the coupling 2, the top of the first oil inlet shaft 14 is connected with a first upper oil pipe 11, the outer wall of the first oil inlet shaft 14 is sleeved with a bearing a, the outer wall of the bearing a is sleeved with a spiral lead bearing seat 35, the top of the bearing a is provided with a clamp spring 26, and the clamp spring 26 is clamped with the spiral lead bearing seat 35;
as shown in fig. 8, the helical lead bearing seat 35 comprises a body c35-3, 5 helical blades d35-2 are respectively arranged on the outer wall of the body c35-3, a through groove 35-1 is arranged on the inner wall of the body c35-3 and at a position corresponding to the helical blade d35-2, a helical liquid passing channel is formed between two adjacent helical blades d35-2, and the helical blade d35-2 is in threaded connection with the inner wall of the coupling 2.
The packing cup packer assembly comprises an upper joint 3, the top of the upper joint 3 is connected with an oil pipe connecting short section 33, the oil pipe connecting short section 33 is connected with a coupling 2, the bottom of the upper joint 3 is connected with one end of a central pipe of a packing cup packer 8, the outer wall of the central pipe of the packing cup packer 8 is sleeved with a centralizer 17, the centralizer 17 is positioned above the packing cup of the packing cup packer 8, the other end of the central pipe of the packing cup packer 8 is connected with a packer lower joint 4, the opening of the packing cup packer 8 is downward, the annular end surface of the packer lower joint 4 is tightly propped against the bottom of the packing cup packer 8, centralizing blocks in the centralizer 17 are distributed along the circumference 4 in an equal distribution manner, the outer wall of the centralizing block in the centralizer is contacted with the inner wall of a well, the centralizer 17 is sequentially provided with a centralizing block upper clamp ring, a centralizing block clamp spring groove and a centering block lower clamp ring from top to bottom, an arc clamp spring groove is arranged in the centralizing block clamp groove, the centering block clamp spring groove is arranged on the inner side of the centering block and is contacted with the clamp spring, the centering device centers the leather cup packer in the well under the action of the spring elasticity of the centering block, so that the outer wall of the leather cup and the inner wall of the well are uniformly extruded and stressed, the blocking effect of the leather cup in the well is improved, two leather cups of the leather cup packer can be arranged according to the blocking pressure requirement, and a sealing ring is arranged between the two leather cups; a third oil feeding pipe 34 is arranged inside the centralizer 17, third helical blades 39 are uniformly arranged on the outer wall of the third oil feeding pipe 34, and the top of the third oil feeding pipe 34 is connected with the first oil inlet shaft 14.
The sand-prevention liquid-feeding oil-gas separation assembly of the separator comprises a liquid-feeding pipe reducing coupling 9, the top of the liquid-feeding pipe reducing coupling 9 is connected with a lower joint 4 of the packer, the bottom of the liquid-feeding pipe reducing coupling 9 is connected with one end of a liquid-feeding pipe 6, and the other end of the liquid-feeding pipe 6 is connected with a joint 7;
a sand control pipe 36 is sleeved outside the liquid inlet pipe 6, a protective pipe 37 is sleeved outside the sand control pipe 36, as shown in figure 4, a plurality of liquid inlet holes 6-1 are formed in the liquid inlet pipe 6, as shown in figure 5, wire windings 36-1 are welded on the side wall of the sand control pipe 36, the gap between the wire windings 36-1 is 0.2mm-0.25mm, screw threads are arranged at two ends of the sand control pipe 36 and are connected with the wire windings 36-1, as shown in figure 6, a plurality of protective pipe liquid inlet holes 37-1 are formed in the protective pipe 37, the length of the protective pipe liquid inlet holes 37-1 formed in the protective pipe 37 is equal to the length of the wire windings of the sand control pipe 36, the length of the protective pipe liquid inlet holes 37-1 formed in the protective pipe 37 is equal to the length of the liquid inlet holes 6-1 formed in the liquid inlet pipe 6, the inner diameter of the protective pipe 37 is greater than the outer diameter of the sand control pipe 36 by 6-10mm, the liquid inlet pipe 6, the sand control pipe 36, The protective pipe 37 has the function of sand prevention;
a second oil inlet shaft 18 is arranged inside the liquid inlet pipe reducing coupling 9, the outer wall of the second oil inlet shaft 18 is sleeved with a bearing b, the outer wall of the bearing b is sleeved with a second spiral liquid passing bearing seat 31, a clamp spring 26 is arranged below the bearing b, and the clamp spring 26 is clamped with the inner wall of the second spiral liquid passing bearing seat 31; the top of the second oil inlet shaft 18 is connected with a third oil feeding pipe 34;
as shown in fig. 10, the second spiral liquid passing bearing seat 31 comprises a body b31-1, 3 spiral blades c31-2 are uniformly arranged on the outer wall of the body b31-1, a spiral liquid passing channel is formed between adjacent spiral blades c31-2, and the spiral blades c31-2 are in threaded connection with the inner wall of the liquid inlet pipe reducing coupling 9;
a central pipe 19 is arranged in the liquid inlet pipe 6, second spiral blades 38 are uniformly arranged on the outer wall of the central pipe 19, and the top of the central pipe 19 is connected with the bottom of a second oil inlet shaft 18;
a third oil inlet shaft 44 is arranged in the joint 7, the outer wall of the third oil inlet shaft 44 is sleeved with a bearing c, the outer wall of the bearing c is sleeved with a first spiral liquid passing bearing seat 30, a clamp spring 26 is arranged above the bearing c, the clamp spring 26 is clamped with the inner wall of the first spiral liquid passing bearing seat 30, the top of the third oil inlet shaft 44 is connected with the bottom of the central pipe 19, the bottom of the joint 7 is sequentially connected with a plurality of groups of blind pipes 40 and second joints 42 at intervals, the bottom of the third oil inlet shaft 44 is sequentially connected with a plurality of groups of second oil feeding pipes 45 at intervals, the tail shaft 20 and the second upper oil pipe 45 are arranged in the blind pipe 40, the outer wall of the second upper oil pipe 45 is uniformly provided with fourth helical blades 43, the tail shaft 20 is arranged in the second joint 42, the outer wall of the tail shaft 20 is sleeved with a bearing c, the outer wall of the bearing c is sleeved with a first spiral liquid passing bearing seat 30, a clamp spring 26 is arranged above the bearing c, and the clamp spring 26 is clamped with the inner wall of the first spiral liquid passing bearing seat 30;
as shown in FIG. 9, the first spiral liquid passing bearing seat 30 comprises a body a30-1, 3 spiral blades b30-2 are uniformly arranged on the outer wall of the body a30-1, a spiral liquid passing channel is formed between adjacent spiral blades b30-2, and the spiral blades b30-2 are in threaded connection with the inner wall of the joint 7.
The included angle between the spiral inclination cutting of the spiral blade d35-2, the spiral blade c31-2 and the spiral blade b30-2 and the horizontal line is 20-60 degrees, different angle adjustment is carried out according to the gas-oil ratio change in the well, the horizontal included angle of the spiral inclination along the liquid flow direction is changed from big to small, the inclination is increased, the rotating speed is gradually increased, the centrifugal force is increased, the gas-oil separation ratio (degassing ratio) is increased, and the oil-gas separation of the oil liquid entering the pump in the well is more sufficient and thorough.
The working principle of the multi-stage autorotation centrifugal sand prevention seal oil-gas separator is as follows: in a high solution gas production area, a separator liquid passing and oil feeding assembly and a leather cup packer assembly are arranged between a separator sand control liquid inlet oil-gas separation assembly and an exhaust liquid separation assembly, the separator is divided into an upper part and a lower part by the leather cup packer, (the whole is assembled, transported and installed in a well), an upper oil sleeve annular space and a lower oil sleeve annular space in the well are sealed and isolated, the two spaces are mutually communicated, crude oil mixed liquid entering the separator sand control liquid inlet oil-gas separation assembly through a liquid inlet pipe 6 descends by utilizing pressure difference flow, the crude oil mixed liquid passes through a first spiral liquid passing bearing seat 30, the rotating speed of the crude oil mixed liquid is accelerated to the bottom of a tail shaft under the action of the first spiral liquid passing bearing seat 30, the crude oil mixed liquid is degassed in the rotating descending process, the gas ascends under the action of a second spiral blade 38, the gas passes through a second spiral liquid passing bearing seat 31 to enter a central pipe of the leather cup packer assembly, and a spiral liquid passing channel on the second spiral liquid passing bearing seat 31 is used for intercepting and jetting, the upward separation of gas is facilitated, the rotating speed is accelerated, the centrifugal force is increased, the degassing ratio is increased, the gas rotates upward under the rotating stirring of the third spiral blade 39 and enters the exhaust gas-liquid separation assembly through the spiral lead bearing seat 35, the gas accelerates upward under the rotating stirring of the first spiral blade 12 and exits the separator through the discharge hole 5-1 on the liquid discharge gas pipe 5, oil liquid rotates at an accelerated speed under the action of the fourth spiral blade 43 by the inner wall of the blind pipe and slows down, the oil-gas separation and the flow stroke are prolonged, the oil liquid oil is discharged from the separator through the first spiral liquid passing bearing seat 30 at the lowest part after being fully degassed by multistage centrifugation, enters the separator under the pumping action of a pump and then flows upward to the oil-suspending hollow shaft, and the gas liquid separator exits and enters the oil well pump.
The multi-stage spiral liquid passing channel is formed by the arranged first spiral liquid passing bearing seat 30, the second spiral liquid passing bearing seat 31 and the spiral lead bearing seat 35, the spiral angle is gradually increased, the crude oil mixed liquid forms jet flow in the rotating uplink process, and the uplink oil gas is forced to rotate in an accelerating way to degas when passing through the spiral channel under the condition that the oil well pump sucks and the formation pressure is a power source.
According to the multistage autorotation centrifugal sand prevention seal oil-gas separator, oil gas ascends, the inclination of a spiral liquid passing channel in the oil-gas descending process is increased in the embodiment 1, the included angle between the spiral liquid passing channel and the horizontal plane is reduced, the thread pitch is shortened, the liquid passing rotation speed is increased, the centrifugal force is increased, the direct current speed is slowed down, the degassing time is prolonged, and the degassing process is prolonged, so that the oil-gas separation ratio is increased, oil sleeve annulus associated gas is discharged at constant pressure under the appropriate oil well pump effect casing pressure, the formation pressure is effectively preserved, the overall recovery ratio is improved, the problem that the oil sleeve annulus associated gas is unsmooth in gas exhaust is effectively solved, an oil pump in a high dissolved gas area is seriously influenced by the associated gas, the pump effect and the single well yield are improved, and the oil extraction economic benefit is improved.
Claims (10)
1. The multistage autorotation centrifugal sand prevention sealing oil-gas separation device is characterized by comprising an upper suspension assembly, wherein the tail end of the upper suspension assembly is sequentially connected with an exhaust liquid separation assembly, a separator liquid passing and oil feeding assembly, a cup packer assembly and a separator sand prevention liquid feeding oil-gas separation assembly.
2. The multi-stage autorotation centrifugal sand prevention and oil and gas separation device as claimed in claim 1, wherein the upper suspension assembly comprises an upper suspension outer cylinder (1), an upper suspension shaft (10) is arranged in the upper suspension outer cylinder (1), a snap spring (26), an anti-tripping rubber ring (25), an adjusting nut (24), a bearing assembly and a first oil seal (22) are sequentially arranged between the upper suspension outer cylinder (1) and the upper suspension shaft (10) from top to bottom, and the snap spring (26) is clamped with the inner wall of the upper suspension outer cylinder (1).
3. The multi-stage autorotation centrifugal sand prevention and sealing oil-gas separator as claimed in claim 2, wherein the exhaust gas-liquid separation assembly comprises a liquid exhaust pipe (5), the top of the liquid exhaust pipe (5) is connected with the bottom of the upper suspension outer cylinder (1), one end of the liquid exhaust pipe (5) close to the upper suspension outer cylinder (1) is provided with a plurality of discharge holes (5-1), the bottom end of the liquid exhaust pipe (5) is sequentially connected with a plurality of groups of joints (7) and blind pipes (40) at intervals, a first oil feeding pipe (11) is arranged inside the liquid exhaust pipe (5), the outer wall of the first oil feeding pipe (11) is uniformly provided with first helical blades (12), the top of the first oil feeding pipe (11) is connected with the upper suspension shaft (10), and the bottom of the first oil feeding pipe (11) is sequentially connected with a plurality of groups of third oil feeding shafts (44), The third oil inlet shaft (44) is arranged inside the joint (7), the outer wall of the third oil inlet shaft (44) is sleeved with the bearing (28), the outer wall of the bearing (28) is sleeved with the spiral lead bearing seat (35), the second oil inlet pipe (45) is arranged in the blind pipe (40), and the outer wall of the second oil inlet pipe (45) is uniformly provided with fourth spiral blades (43);
the spiral lead bearing seat (35) comprises a body c (35-3), a plurality of spiral blades d (35-2) are arranged on the outer wall of the body c (35-3), a through groove (35-1) is formed in the inner wall of the body c (35-3) and in the position corresponding to the spiral blades d (35-2), and the spiral blades d (35-2) are in threaded connection with the inner wall of the joint (7).
4. The multi-stage autorotation centrifugal sand prevention and seal oil and gas separator as claimed in claim 3, wherein the separator liquid and oil passing and feeding assembly comprises a coupling (2), an oil inlet hole (32) is formed in the side wall of the coupling (2), the top of the coupling (2) is connected with a blind pipe (40), a first oil inlet shaft (14) is arranged inside the coupling (2), one end of the first oil inlet shaft (14) is connected with a second oil feeding pipe (45), the other end of the first oil inlet shaft (14) corresponds to the position of the oil inlet hole (32), a bearing (28) is sleeved on the outer wall of the other end of the first oil inlet shaft (14), a second oil seal (27) is arranged at the top of the bearing (28), a clamp spring (26) is arranged at the top of the second oil seal (27), and a bearing seat (29) for spiral liquid passing and secondary sand settling is sleeved on the outer wall of the bearing (28), the clamp spring (26) is clamped with the inner wall of the oil inlet spiral liquid passing and secondary sand setting bearing seat (29), and the oil inlet spiral liquid passing and secondary sand setting bearing seat (29) is positioned inside the coupling (2);
the oil inlet spiral liquid passing and secondary sand setting bearing seat (29) comprises a bearing seat body (29-3), a plurality of spiral blades a (29-1) are uniformly arranged on the side wall of the bearing seat body (29-3), a through hole (29-2) is formed in one spiral blade a (29-1), the through hole (29-2) is matched with an oil inlet hole (32), and the spiral blade a (29-1) is in threaded connection with the inner wall of a coupling (2);
the bottom of the bearing seat body (29-3) is connected with a secondary sand-settling pipe short section (15), and the bottom of the secondary sand-settling pipe short section (15) is provided with a conical plug (16).
5. The multistage autorotation centrifugal sand prevention and packing oil-gas separator as claimed in claim 4, wherein the cup packer assembly comprises an upper joint (3), the top of the upper joint (3) is connected with an oil pipe connection short section (33), the oil pipe connection short section (33) is connected with the coupling (2), the bottom of the upper joint (3) is connected with one end of a central pipe of the cup packer (8), the outer wall of the central pipe of the cup packer (8) is sleeved with a centralizer (17), the centralizer (17) is positioned above a cup of the cup packer (8), and the other end of the central pipe of the cup packer (8) is connected with a lower joint (4) of the packer;
the opening of the packing cup packer (8) is downward, and the annular end surface of the packer lower joint (4) tightly props against the bottom of the packing cup packer (8).
6. The multi-stage autorotation centrifugal sand prevention and oil and gas separation device as claimed in claim 5, wherein the sand prevention liquid inlet oil and gas separation assembly of the separator comprises a liquid inlet pipe reducing coupling (9), the top of the liquid inlet pipe reducing coupling (9) is connected with the lower joint (4) of the packer, the bottom of the liquid inlet pipe reducing coupling (9) is connected with one end of a liquid inlet pipe (6), and the other end of the liquid inlet pipe (6) is connected with the lower joint (7);
a sand control pipe (36) is sleeved outside the liquid inlet pipe (6), a protection pipe (37) is sleeved outside the sand control pipe (36), a plurality of liquid inlet holes (6-1) are formed in the liquid inlet pipe (6), a wire winding (36-1) is welded on the side wall of the sand control pipe (36), screw threads are arranged at two ends of the sand control pipe (36) and connected with the wire winding (36-1), and a plurality of protection pipe liquid inlet holes (37-1) are formed in the protection pipe (37);
a suspension hollow shaft (41) is arranged inside the liquid inlet pipe reducing coupling (9), a bearing b is sleeved on the outer wall of the suspension hollow shaft (41), a first spiral liquid passing bearing seat (30) is sleeved on the outer wall of the bearing b, a clamp spring (26) is arranged below the bearing b, and the clamp spring (26) is clamped with the inner wall of the first spiral liquid passing bearing seat (30);
a central pipe (19) is arranged inside the liquid inlet pipe (6), second helical blades (38) are uniformly arranged on the outer wall of the central pipe (19), and the top of the central pipe (19) is connected with the bottom of a suspended hollow shaft (41);
a tail shaft (20) is arranged in the lower connector (7), the outer wall of the tail shaft (20) is sleeved with a bearing c, the outer wall of the bearing c is sleeved with a first spiral liquid passing bearing seat (30), a clamp spring (26) is arranged above the bearing c, the clamp spring (26) is clamped with the inner wall of the first spiral liquid passing bearing seat (30), and the top of the tail shaft (20) is connected with the bottom of the central pipe (19);
the first spiral liquid passing bearing seat (30) comprises a body a (30-1), a plurality of spiral blades b (30-2) are uniformly arranged on the outer wall of the body a (30-1), and the spiral blades b (30-2) are in threaded connection with the inner wall of the liquid inlet pipe reducing coupling (9).
7. The multi-stage autorotation centrifugal sand prevention and oil and gas separation device as claimed in claim 2, wherein the exhaust gas-liquid separation assembly comprises a liquid exhaust gas pipe (5), the top of the liquid exhaust gas pipe (5) is connected with the bottom of the upper suspension outer cylinder (1), one end of the liquid exhaust gas pipe (5) close to the upper suspension outer cylinder (1) is provided with a plurality of exhaust holes (5-1), a first oil supply pipe (11) is arranged inside the liquid exhaust gas pipe (5), the outer wall of the first oil supply pipe (11) is uniformly provided with first helical blades (12), and the top of the first oil supply pipe (11) is connected with the upper suspension shaft (10).
8. The multi-stage autorotation centrifugal sand prevention and seal oil and gas separator as claimed in claim 7, wherein the separator overflow and oil feed assembly comprises a coupling (2), the top of the coupling (2) is connected with a liquid discharge gas pipe (5), a first oil feed shaft (14) is arranged in the coupling (2), the top of the first oil feed shaft (14) is connected with a first oil feed pipe (11), the outer wall of the first oil feed shaft (14) is sleeved with a bearing a, the outer wall of the bearing a is sleeved with a spiral lead bearing seat (35), the top of the bearing a is provided with a clamp spring (26), and the clamp spring (26) is clamped with the spiral lead bearing seat (35);
the spiral lead bearing seat (35) comprises a body c (35-3), a plurality of spiral blades d (35-2) are arranged on the outer wall of the body c (35-3), a through groove (35-1) is formed in the inner wall of the body c (35-3) and in the position corresponding to the spiral blades d (35-2), and the spiral blades d (35-2) are in threaded connection with the inner wall of the coupling (2).
9. The multi-stage autorotation centrifugal sand prevention and seal oil-gas separator as claimed in claim 8, wherein the cup packer assembly comprises an upper joint (3), the top of the upper joint (3) is connected with an oil pipe connection pup joint (33), the oil pipe connection pup joint (33) is connected with a coupling (2), the bottom of the upper joint (3) is connected with one end of a central pipe of the cup packer (8), a centralizer (17) is sleeved on the outer wall of the central pipe of the cup packer (8), the centralizer (17) is positioned above a cup of the cup packer (8), and the other end of the central pipe of the cup packer (8) is connected with a lower joint (4) of the packer;
the opening of a packing cup of the packing cup packer (8) is downward, and the end surface of the packer lower joint (4) tightly props against the bottom of the packing cup packer (8);
a third oil feeding pipe (34) is arranged inside the centralizer (17), third helical blades (39) are uniformly arranged on the outer wall of the third oil feeding pipe (34), and the top of the third oil feeding pipe (34) is connected with the first oil inlet shaft (14).
10. The multi-stage autorotation centrifugal sand prevention and oil and gas separation device as claimed in claim 9, wherein the sand prevention liquid inlet oil and gas separation assembly of the separator comprises a liquid inlet pipe reducing coupling (9), the top of the liquid inlet pipe reducing coupling (9) is connected with the lower joint (4) of the packer, the bottom of the liquid inlet pipe reducing coupling (9) is connected with one end of a liquid inlet pipe (6), and the other end of the liquid inlet pipe (6) is connected with the lower joint (7);
a sand control pipe (36) is sleeved outside the liquid inlet pipe (6), a protection pipe (37) is sleeved outside the sand control pipe (36), a plurality of liquid inlet holes (6-1) are formed in the liquid inlet pipe (6), a wire winding (36-1) is welded on the side wall of the sand control pipe (36), screw threads are arranged at two ends of the sand control pipe (36) and connected with the wire winding (36-1), and a plurality of protection pipe liquid inlet holes (37-1) are formed in the protection pipe (37);
a second oil inlet shaft (18) is arranged inside the liquid inlet pipe reducing coupling (9), the outer wall of the second oil inlet shaft (18) is sleeved with a bearing b, a second spiral liquid passing bearing seat (31) is sleeved on the outer wall of the bearing b, a clamp spring (26) is arranged below the bearing b, and the clamp spring (26) is clamped with the inner wall of the second spiral liquid passing bearing seat (31); the top of the second oil inlet shaft (18) is connected with a third oil feeding pipe (34);
the second spiral liquid passing bearing seat (31) comprises a body b (31-1), a plurality of spiral blades c (31-2) are uniformly arranged on the outer wall of the body b (31-1), and the spiral blades c (31-2) are in threaded connection with the inner wall of the liquid inlet pipe reducing coupling (9);
a central pipe (19) is arranged inside the liquid inlet pipe (6), second spiral blades (38) are uniformly arranged on the outer wall of the central pipe (19), and the top of the central pipe (19) is connected with the bottom of a second oil inlet shaft (18);
a third oil inlet shaft (44) is arranged in the joint (7), the outer wall of the third oil inlet shaft (44) is sleeved with a bearing c, the outer wall of the bearing c is sleeved with a first spiral liquid passing bearing seat (30), the top of the third oil inlet shaft (44) is connected with the bottom of the central pipe (19), the bottom of the joint (7) is sequentially connected with a plurality of groups of blind pipes (40) and second joints (42) at intervals, the bottom of the third oil inlet shaft (44) is sequentially connected with a plurality of groups of second oil feeding pipes (45) and tail shafts (20) at intervals, the second oil feeding pipe (45) is arranged in the blind pipe (40), the outer wall of the second oil feeding pipe (45) is uniformly provided with fourth helical blades (43), the tail shaft (20) is arranged in the second joint (42), the outer wall of the tail shaft (20) is sleeved with a bearing c, and the outer wall of the bearing c is sleeved with a first spiral liquid passing bearing seat (30);
the first spiral liquid passing bearing seat (30) comprises a body a (30-1), a plurality of spiral blades b (30-2) are uniformly arranged on the outer wall of the body a (30-1), and the spiral blades b (30-2) are in threaded connection with the inner wall of the joint (7).
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| CN202111027154.6A CN113530518A (en) | 2021-09-02 | 2021-09-02 | Multi-stage autorotation centrifugal sand-proof sealed oil-gas separator |
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| CN202111027154.6A CN113530518A (en) | 2021-09-02 | 2021-09-02 | Multi-stage autorotation centrifugal sand-proof sealed oil-gas separator |
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| CN113530518A true CN113530518A (en) | 2021-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116104464A (en) * | 2022-12-01 | 2023-05-12 | 浙江海洋大学 | A kind of anti-sand oil-gas separator based on centrifugal separation |
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| CN200996291Y (en) * | 2006-09-27 | 2007-12-26 | 苗在朝 | Oil-vapour separater under well |
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| CN204960914U (en) * | 2015-09-18 | 2016-01-13 | 重庆鼎顺隆能源技术有限责任公司 | High -efficiency bottomhole separator |
| US20160138380A1 (en) * | 2013-02-14 | 2016-05-19 | James N. McCoy | Gas Separator with Inlet Tail Pipe |
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| CN200996291Y (en) * | 2006-09-27 | 2007-12-26 | 苗在朝 | Oil-vapour separater under well |
| CN202659222U (en) * | 2012-05-30 | 2013-01-09 | 李桂芳 | Twice-separation gas anchor |
| US20160138380A1 (en) * | 2013-02-14 | 2016-05-19 | James N. McCoy | Gas Separator with Inlet Tail Pipe |
| CN204960914U (en) * | 2015-09-18 | 2016-01-13 | 重庆鼎顺隆能源技术有限责任公司 | High -efficiency bottomhole separator |
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| CN116104464A (en) * | 2022-12-01 | 2023-05-12 | 浙江海洋大学 | A kind of anti-sand oil-gas separator based on centrifugal separation |
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