CN112240187A - Sand washing, blockage removing and steam injecting tool - Google Patents
Sand washing, blockage removing and steam injecting tool Download PDFInfo
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- CN112240187A CN112240187A CN202010865630.0A CN202010865630A CN112240187A CN 112240187 A CN112240187 A CN 112240187A CN 202010865630 A CN202010865630 A CN 202010865630A CN 112240187 A CN112240187 A CN 112240187A
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- 239000004576 sand Substances 0.000 title claims abstract description 130
- 238000005406 washing Methods 0.000 title claims abstract description 98
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 94
- 239000003129 oil well Substances 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims description 38
- 238000005086 pumping Methods 0.000 claims description 29
- 238000011010 flushing procedure Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 239000010985 leather Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a sand washing and blockage removing steam injection tool which is sequentially provided with an oil well pump, a steam injection outer pipe, a bridge type sand washing check valve, a sand washing core pipe, a rotational flow sand washing pipe, a thermal expansion telescopic pipe and an anti-falling inclined tip from top to bottom; the invention has the advantages that: the hidden danger of sand blocking is eliminated, the operation is simple, the replacement or the maintenance is convenient, the service life of the oil pipe is prolonged, and the well repairing cost is reduced.
Description
Technical Field
The invention relates to oil exploitation equipment, in particular to a sand washing and blockage removing steam injection tool, and belongs to the field of oil exploitation equipment.
Background
The oil field thick oil reserves are abundant, and the pump for thick oil mainly is feedback pump and injection pump, and the nearly 20 years has not been updated, and itself also has certain defect: 1. the probability of steam injection scale blockage is 5-10%, which causes that the steam cannot be pumped in time, and the steam injection effect is reduced. The down stroke is lost, and the pump efficiency is 5 to 10 percent lower than that of a tubular pump. The oil extraction pipe operation is needed when the pump is detected, the operation period is long, and the cost is high. Before steam injection, if underground sand grains are not cleaned, the permeability of an oil layer can be reduced, even a steam injection channel is blocked, and the steam injection efficiency is reduced. After steam injection, the sand layer is hardened, and the oil well pump is dry-ground after rotary pumping, so that production stop maintenance is needed, and the steam injection cost is wasted. 2. When steam is injected, steam flows out from the bottom of the pump and is locally heated. The easy sand card of oil-well pump leads to oil-well pump life short during the sandy well production, and the oil-well pump is changed in the workover needs lift the tubular column to the well head, puts out the tubular column again, and the inclined point of sand washing is adorned to oil pipe lower part and then transfers the tubular column, surveys the sand face, inputs the high pressure water from oil pipe, discharges the liquid containing sand from oil pipe and sheathed tube annular space. The sand flushing work has long well repairing time, frequent disassembly of the oil pipe screw thread, abrasion of the oil pipe screw thread, reduction of the service life of the oil pipe, long well repairing time and high cost.
When the thick oil well is produced, the bottom temperature is reduced along with the extension of oil extraction time, the viscosity of thick oil is increased, the yield is gradually reduced to no yield, a steam injection channel is small in size, thick oil and silt block the steam injection channel during steam injection, a pump truck is needed to carry out positive and negative well washing and blockage removal, and a well is needed to be repaired when the blockage removal is not completed.
Disclosure of Invention
The invention aims to design a sand washing and blockage removing steam injection tool, which removes the hidden danger of sand blocking, is simple to operate, is convenient to replace or maintain, prolongs the service life of an oil pipe, and reduces the well repairing cost.
The technical scheme of the invention is as follows:
a sand washing and blockage removing steam injection tool is sequentially provided with a matched oil well pump, a steam injection outer pipe, a bridge type sand washing check valve, a sand washing core pipe, a rotational flow sand washing pipe, a thermal expansion telescopic pipe and an anti-falling inclined tip from top to bottom;
the matched oil well pump is sequentially provided with a pump cylinder, a plunger, a traveling valve ball, a fixed valve ball, a sealing mandrel and a first sealing leather cup from top to bottom;
the steam injection outer pipe is sequentially provided with a crossover sub, a first outer pipe and a reducing bush from top to bottom;
the bridge type sand washing check valve is sequentially provided with a shell and a valve plate from top to bottom;
the rotational flow sand washing pipe is sequentially provided with a sand washing coupling and an oil pipe from top to bottom;
the thermal expansion extension tube is sequentially provided with an upper joint, a second inner tube, a second outer tube, a second sealing leather cup and an anti-falling inclined tip from top to bottom;
the matched oil pump is characterized in that a plunger piston is connected with an oil pumping rod string, a sealing mandrel at the lower end of a pump cylinder is connected with a reducing bush of a steam injection outer pipe, the oil pumping unit on the ground drives the oil pumping rod string to move up and down, the plunger piston moves up in a stroke range to realize oil pumping, when the oil pumping rod string is continuously lifted up, the plunger piston moves up beyond the stroke range, the pump cylinder is driven by the plunger piston to move up, the sealing mandrel is separated from the reducing bush of the steam injection outer pipe to be sealed, the pump cylinder of the matched oil pump and an oil pipe string form an annular channel, namely a steam injection channel, so that subsequent steam injection and sand flushing operations are realized, and the lower end of.
The upper part of the steam injection outer pipe is connected with an oil pipe, and the diameter of the steam injection outer pipe is one level larger than that of the oil pipe; the lower end of the steam injection outer pipe is sealed by a reducing bush and is matched with a sealing mandrel of the matched oil well pump to form a sealing matching surface, when the sucker rod string is continuously lifted, the plunger moves upwards to exceed the stroke range, the plunger drives the pump cylinder to move upwards, the sealing mandrel and the reducing bush of the steam injection outer pipe are separated from sealing, and the matched oil well pump cylinder and the oil pipe string form an annular channel without choked flow.
The upper part of the bridge type sand washing check valve is connected with the steam injection outer pipe and is an oil inlet channel of an oil pumping pump, the function is that liquid flows in a single direction, when negative pressure is applied to the inside of the pipe, the valve block is opened, when positive pressure is applied to the inside of the pipe, the valve block is closed, and the lower part of the bridge type sand washing check valve is connected with the rotational flow sand washing pipe;
the rotational flow sand washing pipes are connected in a plurality of ways, the coupling of the connecting part is drilled with a hole which is deviated from the center of the pipe, and the hole is large outside and small inside; when sand is flushed by positive pressure, water is sprayed out tangentially, sand grains in the annulus of the rotational flow sand flushing pipe of the sleeve are impacted and loosened, the sand grains flow rotationally, the sand grains are prevented from impacting the wall of the sleeve, and local sleeve abrasion is reduced; when steam is injected, holes drilled by the coupling are uniformly distributed on the rotational flow sand washing pipe, and steam is uniformly sprayed out, so that an oil layer is uniformly heated, the forward impact of the steam on the casing wall is prevented, and the abrasion of a local casing is reduced.
The upper part of the thermal expansion extension tube is connected with the rotational flow sand washing tube, a second outer tube and a second inner tube of the thermal expansion extension tube can slide relatively, a density gasket is arranged on a sliding matching surface for sealing, the lower end of the second inner tube is processed into an inclined tip type, and staggered reinforcing steel bars are welded at the inclined tip to prevent the second inner tube from tripping and falling to the underground; because the second outer pipe and the second inner pipe can slide relatively, when the lower part of the pipe column sinks sand during steam injection, the thermal expansion telescopic pipe is in an extension state, the pipe column is heated to expand, the second inner pipe is compressed to slide upwards, and the thermal expansion telescopic pipe is shortened, so that the pipe column is prevented from being damaged due to stress increase caused by thermal expansion extension; during sand washing operation, water is injected by the pump truck, the temperature of the pipe column is reduced, the pipe column is cooled and shortened, positive pressure is formed by water injection of the pump truck, the second inner pipe is pushed to slide downwards, and the thermal expansion telescopic pipe is in a recovery extension state.
The upper end of the sand washing core pipe is connected with the lower connector of the matched oil well pump, and the lower end of the sand washing core pipe is basically flush with the upper part of the thermal expansion telescopic pipe.
When the thick oil well is produced, the bottom temperature is reduced along with the prolonging of the oil extraction time, the viscosity of the thick oil is increased, the yield is gradually reduced, the pumping rod column is lifted by the pumping unit to be 1.5 times of the stroke of the pumping unit during steam injection, steam injection operation is carried out, sand flushing operation can be carried out before the steam injection operation, at the moment, impurities such as sand, dead oil and the like in an oil layer and the column are emptied, and the smooth steam injection efficiency is high; meanwhile, the steam outlet is arranged at the oil layer part and is sprayed out through the sand washing coupling hole, so that the steam injection heat efficiency is improved. The operation is simple, the whole oil layer can be uniformly heated by injecting steam, the local heating of the lower area of the former steam injection pump is avoided, the permeability of the oil layer is improved, and the heat energy in the steam is efficiently absorbed; meanwhile, the required steam injection time is also obviously shortened, the heat absorbed by other pipe sections is reduced, the ineffective heat loss is reduced, the utilization efficiency of steam is improved, and stable, efficient and energy-saving production is realized.
The sand-washing blockage-removing steam-injection tool and the matched oil-well pump have large steam-injection channels when injecting steam, and the continuous inner pipe automatically removes blockage when the rod column is lifted up.
When sand washing is carried out, the pumping rod column is lifted by the pumping unit to a stroke which is 1.5 times larger than that of the pumping unit, a matched oil well pump is driven to move upwards, the sealing mandrel moves upwards to be separated from the reducing bush, sealing is removed, a sand washing and steam injection channel is opened, well washing and sand washing are carried out, an outer channel of the bridge type sand washing check valve is closed, water flows downwards and is sprayed out through the step-by-step rotational flow holes of the rotational flow sand washing pipe, the annular space of the sleeve and the oil pipe is washed, sand settling pressure in the rotational flow sand washing pipe can be used for compacting sand settling in the rotational flow sand washing pipe to form a sand bridge, the sand bridge can be damaged by the upward movement of. A well-flushing sand-flushing channel is formed, sand particles return to the ground water tank car through the oil sleeve annulus to complete the well-flushing sand-flushing operation,
when oil is normally pumped, negative pressure enables a valve block inward-moving channel of the bridge type sand-washing check valve to be opened, and oil enters the pump through a hole in the middle of the bridge type sand-washing check valve to form an oil extraction circulation channel.
Steam injection operation can be performed after sand washing is completed, and at the moment, impurities such as sand, dead oil and the like in the oil layer and the pipe column are emptied, so that the steam injection is smooth and efficient; meanwhile, the steam outlet is arranged at the oil layer part and is sprayed out through the cyclone head, so that the steam injection heat efficiency is improved.
The invention has the beneficial effects that: when sand jam is about to occur, the workover rig can lift the sucker rod string pump truck by using the pumping unit to perform sand flushing operation without going up, the hidden danger of the sand jam is eliminated, the operation is simple, when the sand jam occurs in pumping, the workover rig only lifts the sucker rod string up, the oil pump is lifted out of a wellhead for replacement or maintenance, sand flushing operation can be directly performed without lifting out a string, sand-containing liquid is discharged from an annular space between an oil pipe and a casing until the liquid does not contain sand, the pump and the sucker rod string are lowered after the sand flushing operation is finished, the well is repaired, the sand flushing operation and the workover time are short, the disassembly of a screw thread of the oil pipe is avoided, the service life of the oil pipe is prolonged, and the well repairing cost.
The invention is further illustrated by the following figures and examples.
Drawings
FIG. 1 is a schematic structural view of a sand-washing blockage-removing steam injection tool according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a matched oil well pump according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a steam injection outer tube according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a bridge type sand-flushing check valve according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along plane A-A of FIG. 4;
FIG. 6 is a structural view of a sand core barrel according to an embodiment of the present invention;
FIG. 7 is a schematic view of a structure of a swirling sand washing pipe according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along plane B-B of FIG. 7;
FIG. 9 is a schematic structural view of a thermal expansion bellows 6 according to an embodiment of the present invention;
FIG. 10 is a schematic view of an upper steam injection and sand wash channel according to an embodiment of the present invention;
FIG. 11 is a schematic view of a lower steam injection and sand washing channel according to an embodiment of the present invention;
FIG. 12 is a production diagram of sand washing, blockage removing and steam injection;
FIG. 13 is a schematic view of the pumping state;
FIG. 14 is a schematic view of a steam injection state;
FIG. 15 is a schematic view of a sand-blast state;
FIG. 16 is a schematic view of the valve plate opening;
FIG. 17 is a cross-sectional view A-A of FIG. 16;
FIG. 18 is a valve plate closing schematic;
FIG. 19 is a cross-sectional view B-B of FIG. 18;
FIG. 20 is a diagram of a cyclone sand washing pipe;
fig. 21 is a cross-sectional view C-C of fig. 20.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
As shown in fig. 1-21, a sand-washing blockage-removing steam-injection tool is sequentially provided with a matched oil-well pump 1, a steam-injection outer pipe 2, a bridge-type sand-washing check valve 3, a sand-washing core pipe 4, a rotational flow sand-washing pipe 5, a thermal expansion telescopic pipe 6 and an anti-falling inclined tip 7 from top to bottom;
as shown in fig. 2, the matched oil well pump 1 is sequentially provided with a pump cylinder 11, a plunger 12, a floating valve ball 13, a fixed valve ball 14, a sealing mandrel 15 and a first sealing leather cup 16 from top to bottom;
as shown in fig. 3, the steam injection outer pipe 2 is provided with a crossover sub 21, a first outer pipe 22 and a reducing bush 23 in sequence from top to bottom;
as shown in fig. 4, the bridge sand-washing check valve 3 is provided with a housing 31 and a valve plate 32 in sequence from top to bottom;
as shown in fig. 7, the rotational flow sand washing pipe 5 is provided with a sand washing coupling 51 and an oil pipe 52 in sequence from top to bottom;
as shown in fig. 9, the thermal expansion telescopic tube 6 is provided with an upper joint 61, a second inner tube 62, a second outer tube 63, a second sealing cup 64 and an anti-falling inclined tip 7 in sequence from top to bottom;
the plunger of the matched oil well pump 1 is connected with the sucker rod string, the sealing mandrel 15 at the lower end of the pump barrel 11 and the reducing bush 23 of the steam injection outer pipe 2 are connected, the pumping unit on the ground drives the sucker rod string to move up and down, the plunger moves up in a stroke range to realize oil pumping, when the sucker rod string is continuously lifted up, the plunger moves up beyond the stroke range, the plunger drives the pump barrel to move up, the sealing mandrel and the reducing bush 23 of the steam injection outer pipe are separated from sealing, the pump barrel of the matched oil well pump and the oil pipe string form an annular channel (namely a steam injection channel 1.11), the subsequent steam injection and sand flushing operation is realized, and the lower end of the sealing mandrel of the matched oil well pump is connected with 2.
The upper part of the steam injection outer pipe 2 is connected with an oil pipe (above the steam injection outer pipe 2, the patent figure is omitted), and the diameter of the steam injection outer pipe is one step larger than that of the oil pipe, for example, 89 oil pipes are used when 73 oil pipes are used for injecting steam into the outer pipe; the lower end of the steam injection outer pipe 2 is sealed by a reducing bush and is matched with a sealing mandrel of the matched oil well pump 1 to form a sealing matching surface, when the sucker rod string is continuously lifted, the plunger moves upwards to exceed the stroke range, the plunger drives the pump cylinder to move upwards, the sealing mandrel and the reducing bush of the steam injection outer pipe are separated from sealing, the matched oil well pump cylinder and the oil pipe string form an annular channel, and the 89 oil pipe for the steam injection outer pipe is used for expanding the area of the annular channel without flow blocking.
The upper part of the bridge type sand washing check valve 3 is connected with the steam injection outer pipe 2 through a screw thread, and is an oil inlet channel of an oil pumping pump, the function is that liquid flows in a single direction, when negative pressure is applied to the inside of the pipe, the valve block is opened, when positive pressure is applied to the inside of the pipe, the valve block is closed, and the lower part of the bridge type sand washing check valve 3 is connected with the rotational flow sand washing pipe 5;
the upper part of the rotational flow sand washing pipe 5 is connected with the bridge type sand washing check valve 3 through a screw thread, the rotational flow sand washing pipes 5 are connected in a plurality of ways, a coupling of the connecting part is drilled with a hole which is deviated from the center of the pipe, and the hole is large outside and small inside; when sand is flushed by positive pressure, water is sprayed out tangentially, sand grains in the annular space of the rotational flow sand flushing pipe 5 of the sleeve 8 are impacted and loosened, the sand grains flow rotationally, the sand grains are prevented from impacting the pipe wall of the sleeve 8, and local sleeve abrasion is reduced; when steam is injected, holes drilled by the coupling are uniformly distributed on the rotational flow sand washing pipe 5, steam is uniformly sprayed out, an oil layer is uniformly heated, the forward impact of the steam on the casing wall is prevented, and the abrasion of a local casing is reduced.
The upper part of the thermal expansion telescopic pipe 6 is connected with the spiral flow sand washing pipe 5 in a threaded manner, the outer pipe and the inner pipe can slide relatively, a density gasket is arranged on the sliding matching surface for sealing, the lower end of the inner pipe is processed into an inclined point type, and staggered reinforcing steel bars are welded at the inclined point for preventing the inner pipe from tripping and falling to the underground; because the outer pipe and the inner pipe can slide relatively, when the lower part of the pipe column sinks sand during steam injection, the thermal expansion telescopic pipe 6 is in an extension state, the pipe column is heated to expand, the inner pipe is compressed to slide upwards, the thermal expansion telescopic pipe 6 is shortened, and the pipe column is prevented from being damaged due to stress increase caused by thermal expansion extension; during sand washing operation, water is injected by the pump truck, the temperature of the pipe column is reduced, the pipe column is cooled and shortened, positive pressure is formed by water injection of the pump truck, the inner pipe is pushed to slide downwards, and the thermal expansion telescopic pipe 6 is in a recovery extension state.
The upper end of the sand washing core tube 4 is connected with the lower connector of the matched oil well pump 1, and the lower end of the sand washing core tube 4 is basically flush with the upper part of the thermal expansion telescopic tube 6.
When the thick oil well is produced, the bottom temperature is reduced along with the prolonging of the oil extraction time, the viscosity of the thick oil is increased, the yield is gradually reduced, the pumping rod column is lifted by the pumping unit to be 1.5 times of the stroke of the pumping unit during steam injection, steam injection operation is carried out, sand flushing operation can be carried out before the steam injection operation, at the moment, impurities such as sand, dead oil and the like in an oil layer and the column are emptied, and the smooth steam injection efficiency is high; meanwhile, the steam outlet is arranged at the oil layer part and is sprayed out through the hole 51 of the sand washing coupling, so that the steam injection heat efficiency is improved. The operation is simple, the whole oil layer can be uniformly heated by injecting steam, the local heating of the lower area of the former steam injection pump is avoided, the permeability of the oil layer is improved, and the heat energy in the steam is efficiently absorbed; meanwhile, the required steam injection time is also obviously shortened, the heat absorbed by other pipe sections is reduced, the ineffective heat loss is reduced, the utilization efficiency of steam is improved, and stable, efficient and energy-saving production is realized.
The sand-washing blockage-removing steam-injection tool and the matched oil-well pump have large steam-injection channels when injecting steam, and the continuous inner pipe automatically removes blockage when the rod column is lifted up.
When sand washing is carried out, the sucker rod column is lifted by the oil pumping unit to a stroke which is 1.5 times larger than that of the oil pumping unit, the matched oil well pump 1 is driven to move upwards, the sealing mandrel 1.1 moves upwards (a part on the lower part of the matched oil well pump 1) and the reducing bush 2.1 (a part on the steam injection outer pipe 2, the reducing bush is positioned on the lower part of the steam injection outer pipe 2, the sealing mandrel 1.1 is sealed with the reducing bush 2.1, the conical surface of the sealing mandrel is matched with and limited, the matched pump is limited and sealed), the sealing is released, a sand washing and steam injection channel is opened, well washing and sand washing are carried out, the outer channel of the bridge type sand washing check valve 3 is closed, water flows downwards and is sprayed out through the cyclone sand washing pipe 5 step by step, a washing sleeve 11 (shown in a figure 10) and the annular space of an oil pipe are washed and compacted by sand settling pressure inside the cyclone sand washing pipe to form a sand bridge, and the. A well-flushing sand-flushing channel is formed, sand particles return to the ground water tank car through the oil sleeve annulus to complete the well-flushing sand-flushing operation,
when oil is normally pumped, negative pressure enables a valve plate 51 of the bridge type sand washing check valve 5 to move inwards to open a channel, and oil enters the pump through a hole in the middle of the bridge type sand washing check valve to form an oil extraction circulation channel.
Steam injection operation can be performed after sand washing is completed, and at the moment, impurities such as sand, dead oil and the like in the oil layer and the pipe column are emptied, so that the steam injection is smooth and efficient; meanwhile, the steam outlet is arranged at the oil layer part and is sprayed out through the cyclone head, so that the steam injection heat efficiency is improved.
Claims (7)
1. The utility model provides a sand washing unblocks steam injection instrument which characterized in that: the self-cleaning sand washing device is sequentially provided with an oil well pump, a steam injection outer pipe, a bridge type sand washing check valve, a sand washing core pipe, a rotational flow sand washing pipe, a thermal expansion telescopic pipe and an anti-falling inclined tip from top to bottom; the matched oil well pump is sequentially provided with a pump cylinder, a plunger, a traveling valve ball, a fixed valve ball, a sealing mandrel and a first sealing leather cup from top to bottom; the steam injection outer pipe is sequentially provided with a crossover sub, a first outer pipe and a reducing bush from top to bottom; the bridge type sand washing check valve is sequentially provided with a shell and a valve plate from top to bottom; the rotational flow sand washing pipe is sequentially provided with a sand washing coupling and an oil pipe from top to bottom; the thermal expansion extension tube is sequentially provided with an upper joint, a second inner tube, a second outer tube, a second sealing leather cup and an anti-falling inclined tip from top to bottom.
2. The sand-washing blockage-removing steam injection tool according to claim 1, characterized in that: the plunger of the matched oil pump is connected with the oil pumping rod string, the sealing mandrel at the lower end of the pump cylinder is connected with the reducing bush of the steam injection outer pipe, the oil pumping unit on the ground drives the oil pumping rod string to move up and down, and the plunger moves up and down in the stroke range to realize oil pumping; when the sucker rod string is lifted upwards continuously, the plunger moves upwards to exceed the stroke range, the plunger drives the pump barrel to move upwards, the sealing mandrel is separated from the reducing bush of the steam injection outer pipe, and the pump barrel of the matched oil well pump and the oil pipe string form an annular channel, namely a steam injection channel, so that the subsequent steam injection sand flushing operation is realized.
3. The sand-washing blockage-removing steam injection tool according to claim 1, characterized in that: the upper part of the steam injection outer pipe is connected with an oil pipe, and the diameter of the steam injection outer pipe is one level larger than that of the oil pipe; the lower end of the steam injection outer pipe is sealed by a reducing bush and is matched with a sealing mandrel of the matched oil well pump to form a sealing matching surface; when the sucker rod string is lifted upwards continuously, the plunger moves upwards beyond the stroke range, drives the pump barrel to move upwards, the sealing mandrel and the reducing bush of the steam injection outer pipe are separated from sealing, and an annular channel is formed between the pump barrel of the matched oil well pump and the oil pipe string.
4. The sand-washing blockage-removing steam injection tool according to claim 1, characterized in that: the upper part of the bridge type sand washing check valve is connected with the steam injection outer pipe and is an oil inlet channel of the oil pumping pump, when negative pressure is applied to the inside of the pipe, the valve block is opened, when positive pressure is applied to the inside of the pipe, the valve block is closed, and the lower part of the bridge type sand washing check valve is connected with the rotational flow sand washing pipe.
5. The sand-washing blockage-removing steam injection tool according to claim 1, characterized in that: the rotational flow sand washing pipes are connected in a plurality of ways, the coupling of the connecting part is drilled with a hole which is deviated from the center of the pipe, and the hole is large outside and small inside; when the sand is flushed by positive pressure, water is sprayed out tangentially, sand grains in the annulus of the sleeve rotational flow sand flushing pipe are impacted and loosened, and the sand grains flow rotationally; when steam is injected, holes drilled by the coupling are uniformly distributed on the rotational flow sand washing pipe, and steam is uniformly sprayed out to uniformly heat an oil layer.
6. The sand-washing blockage-removing steam injection tool according to claim 1, characterized in that: the upper part of the thermal expansion extension pipe is connected with the rotational flow sand washing pipe, the second outer pipe and the second inner pipe slide relatively, a density gasket is arranged on a sliding matching surface for sealing, the lower end of the second inner pipe is processed into an inclined tip type, and staggered reinforcing steel bars are welded at the inclined tip; when steam is injected, when sand is deposited at the lower part of the pipe column, the thermal expansion telescopic pipe is in an extension state, the pipe column is heated to expand, the second inner pipe is compressed to slide upwards, and the thermal expansion telescopic pipe is shortened; during sand washing operation, water is injected by the pump truck, the temperature of the pipe column is reduced, the pipe column is cooled and shortened, positive pressure is formed by water injection of the pump truck, the second inner pipe is pushed to slide downwards, and the thermal expansion telescopic pipe is in a recovery extension state.
7. The sand-washing blockage-removing steam injection tool according to claim 1, characterized in that: the upper end of the sand washing core pipe is connected with the lower connector of the matched oil well pump, and the lower end of the sand washing core pipe is basically flush with the upper part of the thermal expansion telescopic pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865630.0A CN112240187A (en) | 2020-08-25 | 2020-08-25 | Sand washing, blockage removing and steam injecting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865630.0A CN112240187A (en) | 2020-08-25 | 2020-08-25 | Sand washing, blockage removing and steam injecting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112240187A true CN112240187A (en) | 2021-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010865630.0A Pending CN112240187A (en) | 2020-08-25 | 2020-08-25 | Sand washing, blockage removing and steam injecting tool |
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| CN (1) | CN112240187A (en) |
Cited By (2)
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| CN114382440A (en) * | 2022-01-05 | 2022-04-22 | 烟台杰瑞石油装备技术有限公司 | Oil extraction device |
| CN116480297A (en) * | 2023-06-21 | 2023-07-25 | 海塔石油科技有限公司 | Horizontal well pumping and sand discharging double-circulation torque converter and application method thereof |
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| CN114382440A (en) * | 2022-01-05 | 2022-04-22 | 烟台杰瑞石油装备技术有限公司 | Oil extraction device |
| CN116480297A (en) * | 2023-06-21 | 2023-07-25 | 海塔石油科技有限公司 | Horizontal well pumping and sand discharging double-circulation torque converter and application method thereof |
| CN116480297B (en) * | 2023-06-21 | 2023-09-08 | 海塔石油科技有限公司 | Horizontal well pumping and sand discharging double-circulation torque converter and application method thereof |
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