CN116792064B - Sand control screen pipe with anti-blocking function for petroleum exploitation - Google Patents
Sand control screen pipe with anti-blocking function for petroleum exploitation Download PDFInfo
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- CN116792064B CN116792064B CN202311047933.1A CN202311047933A CN116792064B CN 116792064 B CN116792064 B CN 116792064B CN 202311047933 A CN202311047933 A CN 202311047933A CN 116792064 B CN116792064 B CN 116792064B
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- oil
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- 239000004576 sand Substances 0.000 title claims abstract description 60
- 239000003208 petroleum Substances 0.000 title claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 230000008878 coupling Effects 0.000 claims description 50
- 238000010168 coupling process Methods 0.000 claims description 50
- 238000005859 coupling reaction Methods 0.000 claims description 50
- 238000007789 sealing Methods 0.000 claims description 49
- 230000000670 limiting effect Effects 0.000 claims description 34
- 239000003129 oil well Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Joints Allowing Movement (AREA)
Abstract
The application relates to the technical field of petroleum downhole tools, in particular to a sand control screen pipe with a blocking prevention function for petroleum exploitation. The connecting shell is fixedly connected with a guide piece, the guide piece is connected with a sliding shell in a sliding manner, guide blocks which are symmetrically distributed are fixedly connected to the inner wall of the connecting shell in a sliding manner, a sliding ring which is fixedly connected with the sliding shell and is connected with the guide blocks in a sliding manner is arranged on the inner wall of the connecting shell in a sliding manner, a sliding plug is fixedly connected between the first fixing sleeve and the connecting shell in a sliding manner, an equidistant second fixing sleeve is fixedly connected to the connecting shell in a sliding manner, a first connecting ring which is provided with circumferential equidistant through holes is fixedly connected between the first fixing sleeve and the adjacent second fixing sleeve, and sand filtering holes are formed in the connecting shell. According to the application, the sliding plug moves downwards to reset, residual oil between the first fixed sleeve and the connecting shell is extruded downwards, the oil flows outwards from the sand filtering holes again, and the sand filtering holes of the connecting shell are backflushed.
Description
Technical Field
The application relates to the technical field of petroleum downhole tools, in particular to a sand control screen pipe with a blocking prevention function for petroleum exploitation.
Background
Many problems are faced in the development process of the oil field, sand production of the oil well is one of the main problems in the oil and gas exploitation process, sand production can cause sand burying of an oil guiding layer, and the extracted sand also can cause abrasion to underground and ground equipment, so that maintenance workload of tools and equipment is increased, and further oil yield in unit time is reduced.
The main function of the petroleum screen pipe is sand prevention, the sand content in petroleum can be reduced by the sand prevention screen pipe, but when the petroleum is filtered by the screen pipe, sand holes of the screen pipe can be blocked by sand for a long time, so that the exploitation efficiency is low.
Disclosure of Invention
The application provides a sand control screen pipe with anti-blocking function for oil exploitation, which aims to overcome the defect that the sand control screen pipe can reduce the sand content in oil, but when the screen pipe filters oil, sand filtering holes of the screen pipe can be blocked by sand for a long time, so that the exploitation efficiency is low.
The utility model provides a sand control screen pipe with anti-sticking stifled function is used in oil exploitation, including the coupling shell, the coupling shell rigid coupling has the guide, guide sliding connection has the sliding closure, the inner wall rigid coupling of coupling shell has the guide block of symmetric distribution, the inner wall sliding connection of coupling shell have with sliding closure rigid coupling with guide block sliding connection's slip ring, the guide with the rigid coupling has first elastic component between the slip ring, the guide rigid coupling has the adapter sleeve, the coupling shell rigid coupling has equidistant first fixed sleeve, the lower extreme of adapter sleeve with adjacent rigid coupling has the holding ring between the first fixed sleeve, first fixed sleeve with sliding connection has the slip stopper between the coupling shell, the slip stopper with adjacent rigid coupling has the second elastic component between the first fixed sleeve, the coupling shell rigid coupling has equidistant second fixed sleeve, first fixed sleeve with adjacent rigid coupling has first connecting ring between the second fixed sleeve, the adapter sleeve is provided with the filtration pore, the adapter sleeve is provided with between first fixed sleeve and the second fixed sleeve has the spacing subassembly on the side.
Further, the upper portion of the guide member is provided with an inclined surface for guiding a tool to be run into the well, the guide member is provided with circumferentially equidistant through holes, and the lower portion of the guide member is provided with a step surface for limiting the sliding shell.
Further, the upper side of the sliding shell is provided with through holes with equal circumferential intervals, the inner side surface of the sliding shell is provided with symmetrical annular plates, and the distance between two adjacent annular plates in the sliding shell is gradually reduced from bottom to top.
Further, a limiting ring is arranged on the outer side of the first fixing sleeve, and the limiting ring on the first fixing sleeve is used for limiting the adjacent sliding plugs.
Further, the sand filtering hole arranged on the connecting shell is located between the first fixing sleeve and the adjacent sliding plug, and sealing rings are arranged on the inner ring surface and the outer ring surface of the sliding plug and used for increasing the tightness between the sliding plug and the connecting shell and between the sliding plug and the adjacent first fixing sleeve.
Further, a gap is formed between the first fixing sleeve and the second fixing sleeve adjacent to the first fixing sleeve, and the width of the sliding plug is larger than that of the gap between the first fixing sleeve and the second fixing sleeve.
Further, the sealing assembly comprises a sealing ring, the sealing ring sliding connection in between the first fixed cover with the second fixed cover, the upside of first go-between is provided with circumference equidistant through-hole and spout, the spout of first go-between is located its through-hole's upside, sliding connection has the sliding block in the spout of first go-between, the sliding block with adjacent sealing ring rigid coupling, circumference equidistant have the second go-between the sliding block, the adapter sleeve pipe cover is equipped with equidistant third go-between, the third go-between is located adjacent the upside of first go-between, the third go-between with adjacent the rigid coupling has circumference equidistant third elastic component between the second go-between, the sliding shell rigid coupling has circumference equidistant connecting rod, circumference equidistant the connecting rod all with the third go-between rigid coupling.
Further, the width of the sealing ring is larger than the gap between the first fixing sleeve and the adjacent second fixing sleeve, and sealing rings are arranged on the upper side and the lower side of the inner ring surface of the sealing ring and used for increasing the tightness between the sealing ring and the adjacent first fixing sleeve and the adjacent second fixing sleeve.
Further, the spacing subassembly is including the mount of circumference distribution, circumference distribution the mount all rigid coupling in the fixed cover of second, mount sliding connection has the stopper, the stopper is located first go-between with the upside of second go-between, mount sliding connection has the bracing piece, the bracing piece with be adjacent the stopper rigid coupling, the bracing piece cover is equipped with the fourth elastic component, the both ends of fourth elastic component are rigid coupling respectively in adjacent the mount with adjacent the stopper, the fixed cover sliding connection of second has the slide bar of circumference distribution, the slide bar with the fixed cover sealing fit of second, the slide bar rigid coupling has the wedge, the bracing piece rigid coupling have with adjacent wedge complex guide post.
Further, the upper side of the outer ring surface of the second connecting ring and the lower side of the limiting block are respectively provided with an inclined surface, so that the second connecting ring can be reset downwards.
In summary, the application has the following beneficial effects:
1. the sliding plug moves downwards to reset, residual oil between the first fixed sleeve and the connecting shell is extruded downwards, the oil flows outwards from the sand filtering holes again, the sand filtering holes of the connecting shell are backflushed, the sand filtering holes of the connecting shell are reduced from being piled up in the underground silt, the sand filtering holes of the connecting shell are cleaned to a certain extent, and the screen pipe is completely blocked after long-time use.
2. After the sand filtering holes at the same height are completely blocked, the sliding plug moves upwards, so that the first fixed sleeve and the connecting shell are in a negative pressure state, after the sealing ring moves upwards to remove the gap between the first fixed sleeve and the second fixed sleeve, part of petroleum is fed into the gap between the first fixed sleeve and the second fixed sleeve, and then the oil is fed into the gap between the first fixed sleeve and the connecting shell, and the petroleum between the first fixed sleeve and the connecting shell is enabled to recoil the blocked sand filtering holes under the action of the elasticity of the second elastic piece, so that the influence of underground sand and stone on the screen pipe is reduced, the time interval of cleaning the screen pipe by workers is prolonged, the times of stopping and feeding into an underground cleaning tool is reduced, and the pumping efficiency is improved to some extent.
3. The guiding piece and the connecting sleeve are used for guiding the underground cleaning tool, so that the underground cleaning tool is prevented from colliding with the inner part of the connecting shell.
Drawings
FIG. 1 is a schematic view of a partially cut-away perspective structure of the present application;
FIG. 2 is a schematic cross-sectional perspective view of the connection housing of the present application;
FIG. 3 is a schematic perspective view showing a cross-sectional structure of an upper portion of a connection housing according to the present application;
FIG. 4 is a schematic perspective view in cross-section of the guide, slide housing and slide ring of the present application;
FIG. 5 is a schematic perspective view showing a cross-sectional structure of a lower portion of a connection housing according to the present application;
FIG. 6 is a schematic cross-sectional perspective view of a first and second retaining sleeve of the present application;
FIG. 7 is a schematic cross-sectional perspective view of a seal assembly of the present application;
fig. 8 is a schematic perspective view of a limiting assembly according to the present application.
In the above figures: 1-connecting shell, 2-guiding piece, 3-sliding shell, 4-guiding block, 5-sliding ring, 6-first elastic piece, 7-connecting sleeve, 8-first sleeve, 9-supporting ring, 10-sliding plug, 101-second elastic piece, 11-second fixed sleeve, 12-first connecting ring, 13-sealing ring, 14-sliding block, 141-second connecting ring, 15-third connecting ring, 16-third elastic piece, 17-connecting rod, 18-fixing frame, 19-limiting block, 20-supporting rod, 21-fourth elastic piece, 22-sliding rod, 23-wedge plate, 24-guiding column.
Detailed Description
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. It will be understood by those skilled in the art that while embodiments of the present application have been shown and described, it is intended to be limited only by the appended claims, and that numerous changes, modifications, substitutions and alterations may be made hereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.
The utility model provides a sand control screen pipe with anti-blocking function for oil exploitation, including coupling shell 1, coupling shell 1 rigid coupling has guide 2, guide 2 is used for guiding the clearance instrument of going into the pit, avoid the clearance instrument to collide with the part in coupling shell 1, guide 2 sliding connection has sliding shell 3, sliding shell 3's upside is provided with circumference equidistant through-hole, sliding shell 3's medial surface is provided with four annular plates of symmetry, the distance between two adjacent annular plates in sliding shell 3 reduces from bottom to top gradually, under four annular plates's effect, resistance is produced when making the oil flow upwards through sliding shell 3, under the promotion of oil, sliding shell 3 upwards moves along guide 2, guide 2's upper portion sets up to the inclined plane for guiding the instrument of going into the pit, guide 2 is provided with circumference equidistant through-hole, the lower part of the guide piece 2 is provided with a step surface for limiting the sliding shell 3, when petroleum stops flowing upwards, the step surface at the lower side of the guide piece 2 limits the sliding shell 3, the inner wall of the connecting shell 1 is fixedly connected with two symmetrically distributed guide blocks 4, the inner wall of the connecting shell 1 is slidably connected with a sliding ring 5 fixedly connected with the sliding shell 3, the sliding ring 5 is slidably connected with the guide blocks 4, a first elastic piece 6 is fixedly connected between the guide piece 2 and the sliding ring 5, the first elastic piece 6 is arranged as a spring and sleeved outside the guide piece 2, the sliding shell 3 drives the sliding ring 5 to move upwards along the two guide blocks 4, at the moment, the first elastic piece 6 is compressed, the guide piece 2 is fixedly connected with a connecting sleeve 7, the guide piece 2 is communicated with the connecting sleeve 7, the connecting sleeve 7 is provided with circumferentially equidistant through holes, the inner part of the connecting shell 1 is fixedly connected with a equidistant first fixing sleeve 8, a supporting ring 9 is fixedly connected between the lower end of the connecting sleeve 7 and the adjacent first fixing sleeve 8, the supporting ring 9 is used for fixing the lower end of the connecting sleeve 7, a sliding plug 10 is slidably connected between the first fixing sleeve 8 and the connecting shell 1, sand filtering holes arranged on the connecting shell 1 are positioned between the first fixing sleeve 8 and the adjacent sliding plug 10, sealing rings are arranged on the inner ring surface and the outer ring surface of the sliding plug 10 and are used for increasing the tightness between the sliding plug 10 and the connecting shell 1 and between the adjacent first fixing sleeve 8, a limiting ring is arranged on the outer side of the first fixing sleeve 8, the limiting ring on the first fixing sleeve 8 is positioned on the upper side of the adjacent sand filtering holes, the limiting ring on the first fixing sleeve 8 is used for limiting the adjacent sliding plug 10, the phenomenon that the sliding plug 10 is positioned on the lower side of the sand filtering holes of the connecting shell 1 in the resetting process of the sliding plug 10 is avoided, a second elastic piece 101 is fixedly connected between the sliding plug 10 and the adjacent first fixing sleeve 8, the second elastic piece 101 is set as a tension spring, when the piston of the oil pump moves upwards, the sliding plug 10 moves upwards along the first fixing sleeve 8 and the connecting shell 1, meanwhile, the second elastic piece 101 is stretched, the connecting shell 1 is fixedly connected with the equidistant second fixing sleeve 11, a gap is arranged between the first fixing sleeve 8 and the adjacent second fixing sleeve 11, the width of the sliding plug 10 is larger than that of the gap between the first fixing sleeve 8 and the second fixing sleeve 11, the sliding plug 10 is prevented from being separated from the first fixing sleeve 8 and the second fixing sleeve 11 in the upward moving process of the sliding plug 10, the sealing failure of the sliding plug 10 is caused, a first connecting ring 12 is fixedly connected between the first fixing sleeve 8 and the adjacent second fixing sleeve 11, the first connecting ring 12 is used for improving the stability between the first fixing sleeve 8 and the adjacent second fixing sleeve 11, the first connecting ring 12 is provided with a circumferential equidistant through hole, the connection shell 1 is provided with the sand filtering hole, is provided with seal assembly between first fixed cover 8 and the adjacent fixed cover 11 of second, and the upside of the fixed cover 11 of second is provided with spacing subassembly.
As shown in fig. 6 and 7, the sealing assembly comprises a sealing ring 13, the sealing ring 13 is slidably connected between the first fixing sleeve 8 and the second fixing sleeve 11, the sealing ring 13 is used for sealing a gap between the first fixing sleeve 8 and the second fixing sleeve 11, the width of the sealing ring 13 is larger than that of the gap between the first fixing sleeve 8 and the second fixing sleeve 11, in an initial state, the sealing ring 13 is simultaneously contacted with the adjacent first fixing sleeve 8 and the adjacent second fixing sleeve 11, sealing rings are respectively arranged on the upper side and the lower side of an inner ring surface of the sealing ring 13, the sealing ring 13 is used for increasing the tightness between the sealing ring 13 and the adjacent first fixing sleeve 8 and the adjacent second fixing sleeve 11, through holes and four sliding grooves which are circumferentially equidistant are arranged on the upper side of the first connecting ring 12, the sliding grooves of the first connecting ring 12 are positioned on the upper side of the through holes, the sliding grooves of the first connecting ring 12 are slidably connected with sliding blocks 14, the sliding blocks 14 are fixedly connected with the adjacent sealing rings 13, when the sliding blocks 14 drive the sealing rings 13 to move upwards, the sliding blocks 14 move upwards along the adjacent sliding grooves of the first connecting rings 12, second connecting rings 141 are fixedly connected between the four sliding blocks 14 with equal intervals in the circumferential direction, the connecting sleeve 7 is sleeved with third connecting rings 15 with equal intervals, the third connecting rings 15 are not contacted with the connecting sleeve 7, the third connecting rings 15 are positioned on the upper sides of the adjacent first connecting rings 12, four third elastic pieces 16 with equal intervals in the circumferential direction are fixedly connected between the third connecting rings 15 and the adjacent second connecting rings 141, the third elastic pieces 16 are provided with tension springs, the third connecting rings 15 drive the third connecting rings 15 to slide upwards through the third elastic pieces 16, the sliding shell 3 is fixedly connected with connecting rods 17 with equal intervals in the circumferential direction, when the connecting rods 17 move upwards, the third connecting rings 15 are driven to synchronously move upwards until the third elastic pieces 16 are fully stretched, the connecting rods 17 with equal intervals in the circumferential direction are fixedly connected with the third connecting ring 15.
As shown in fig. 7 and 8, the limiting assembly comprises four fixing frames 18 distributed circumferentially, the four fixing frames 18 distributed circumferentially are fixedly connected to the second fixing sleeve 11, the fixing frames 18 are slidably connected with limiting blocks 19, the limiting blocks 19 are positioned on the upper sides of the first connecting ring 12 and the second connecting ring 141, the limiting blocks 19 are used for limiting the second connecting ring 141, the third connecting ring 15 moves upwards firstly, the second connecting ring 141 is pulled to move upwards through the third elastic piece 16, so that the sealing ring 13 releases the sealing of a gap between the first fixing sleeve 8 and the second fixing sleeve 11, the fixing frames 18 are slidably connected with supporting rods 20, the supporting rods 20 are fixedly connected with adjacent limiting blocks 19, the supporting rods 20 are sleeved with fourth elastic pieces 21, the fourth elastic pieces 21 are arranged as springs, two ends of each fourth elastic piece 21 are fixedly connected with the adjacent fixing frames 18 and the adjacent limiting blocks 19 respectively, when the limiting block 19 is far away from the second connecting ring 141, the fourth elastic piece 21 is compressed, the upper side of the outer ring surface of the second connecting ring 141 and the lower side of the limiting block 19 are both provided with inclined surfaces, so that the second connecting ring 141 is convenient to reset downwards, incomplete downward movement and resetting of the second connecting ring 141 are avoided, the second connecting ring 141 and the limiting block 19 are prevented from being blocked, the second fixing sleeve 11 is slidably connected with four sliding rods 22 distributed in the circumferential direction, the sliding rods 22 are in sealing fit with the second fixing sleeve 11, the sliding rods 22 are fixedly connected with wedge plates 23, the supporting rods 20 are fixedly connected with guide posts 24 matched with adjacent wedge plates 23, and when the sliding plug 10 slides upwards, the sliding plug 10 upwards extrudes the sliding rods 22, so that the wedge plates 23 extrude the adjacent guide posts 24, and the supporting rods 20 drive the limiting block 19 to be far away from the second connecting ring 141.
The staff installs this screen pipe in the downside of tail pipe hanger to with this screen pipe hanger down into the oil well, along with the continuous work of oil-well pump, the piston of oil-well pump reciprocates from top to bottom, the oil in the oil-well pump is intermittent type upward flow, the piston of oil-well pump is upwards moved, under initial condition, sealing ring 13 and adjacent first fixed cover 8 and adjacent second fixed cover 11 sealed cooperation, the oil is received the back of taking off of oil-well pump, the oil of coupling shell 1 flows upwards this moment, the upper side oil of sliding plug 10 is discharged from the through-hole of adjacent second fixed cover 11 this moment, under the effect of oil pump, then five sliding plugs 10 all upwards move along coupling shell 1 and adjacent first fixed cover 8, five second elastic members 101 are stretched gradually, take the case of the most sideslip plug 10, sliding plug 10 upwards moves, be in the negative pressure state between first fixed cover 8 and the coupling shell 1, the oil is through the filtration sand hole of coupling shell 1, get into between first fixed cover 8 and the coupling shell 1.
In the above process, the oil in the connection housing 1 flows upward, and when the oil flows, a part of the oil flows upward in the middle of the connection sleeve 7, another part of the oil flows upward outside the connection sleeve 7, the oil flowing upward from the outside of the connection sleeve 7 flows through the sliding housing 3, and when the oil flows through the sliding housing 3, under the action of the annular plate on the sliding housing 3, the oil generates resistance at the sliding housing 3 when flowing upward, and then the sliding housing 3 slides upward along the guide member 2, the sliding housing 3 pushes the sliding ring 5 upward, the sliding ring 5 slides upward along the guide block 4, the first elastic member 6 is compressed, and the sliding housing 3 moves upward to drive the four connecting rods 17 to move upward synchronously.
The four connecting rods 17 drive the five third connecting rings 15 to move upwards, the third elastic piece 16 between the third connecting rings 15 and the adjacent second connecting rings 141 is stretched, at this time, the second connecting rings 141 cannot slide upwards under the limiting action of the limiting block 19, as the sliding plug 10 slides upwards, the upper part of the sliding plug 10 is firstly separated from the upper side of the first fixing sleeve 8 and contacts and seals with the second fixing sleeve 11, the sliding plug 10 continues to slide upwards, the lower part of the sliding plug 10 gradually releases the cooperation with the first fixing sleeve 8, the sliding plug 10 slides upwards along the second fixing sleeve 11 and presses the adjacent sliding rod 22 upwards until the sliding plug 10 contacts with the upper side of the second fixing sleeve 11, the sliding rod 22 drives the wedge plate 23 thereon to move upwards, the wedge plate 23 moves upwards to press the adjacent guide post 24, the guide post 24 moves along the inclined plane of the adjacent wedge plate 23, so that the support rod 20 slides along the adjacent fixed frame 18, the fixed frame 18 drives the limiting block 19 to move away from the second connecting ring 141, the fourth elastic piece 21 is compressed, after the limiting block 19 is far away from the second connecting ring 141, the second connecting ring 141 releases the limiting, then under the elastic force of the third elastic piece 16, the second connecting ring 141 drives the sealing ring 13 to slide upwards through the sliding block 14 until the sealing ring 13 loses cooperation with the first fixed sleeve 8, then petroleum passes through the gap between the first fixed sleeve 8 and the adjacent second fixed sleeve 11 and flows upwards through the through hole of the first connecting ring 12, and in the whole process, the piston of the oil well pump is always in an upward moving state (oil pumping state).
When the piston of the oil well pump stops moving upwards, under the action of the elastic force of the first elastic piece 6, the sliding ring 5 and the sliding shell 3 move downwards to reset, the sliding shell 3 drives the third connecting ring 15 to move downwards to reset through the connecting rod 17, meanwhile, under the action of the elastic force of the second elastic piece 101, the sliding plug 10 moves downwards to reset, after the second connecting ring 141 resets, under the action of the elastic force of the fourth elastic piece 21, the limiting block 19 gradually resets along with the second connecting ring, the sealing ring 13 seals the gap between the first fixed sleeve 8 and the second fixed sleeve 11 again, then the sliding plug 10 moves downwards to reset, the sliding plug 10 moves downwards until being separated from the sliding rod 22, residual oil between the first fixed sleeve 8 and the connecting shell 1 is extruded downwards, the oil flows outwards again from the sand filtering holes to recoil the sand filtering holes of the connecting shell 1, sediment is reduced to be accumulated at the sand filtering holes of the connecting shell 1, and the sand filtering holes of the connecting shell 1 are cleaned to a certain extent, so that the screen pipe is completely blocked after long-time use, and in the process, the piston of the oil well pump moves downwards.
After long-time use, pile up a large amount of silt around the connection shell 1, after the sand filtering hole of same height is blocked completely, the piston of oil-well pump upwards moves, make slip stopper 10 upwards move again, be negative pressure state between first fixed cover 8 and the connection shell 1 this moment, after seal ring 13 upwards moves and releases the sealed back to the space between first fixed cover 8 and the fixed cover 11 of second, after part petroleum passes through the space between first fixed cover 8 and the fixed cover 11 of second, fill in between first fixed cover 8 and the connection shell 1, along with the piston of oil-well pump moves downwards, under the elasticity effect of second elastic component 101, make the oil between first fixed cover 8 and the connection shell 1 to the sand filtering hole that is blocked carry out the recoil, thereby reduce the influence of sand and stone in the pit to this screen pipe, the time interval of staff's clearance to this screen pipe has been prolonged simultaneously, the shut down time of down clearance instrument of going into, make pumping efficiency promote.
When the screen pipe is completely blocked, a worker goes into the underground cleaning tool to clean sand around the screen pipe, and when the screen pipe goes into the underground cleaning tool, the guide piece 2 and the connecting sleeve 7 guide the underground cleaning tool, so that the underground cleaning tool is prevented from colliding with the internal parts of the connecting shell 1.
While the preferred embodiment of the present application has been illustrated and described, the present application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (6)
1. The utility model provides a sand control screen pipe with anti-blocking function for oil exploitation, includes coupling shell (1), characterized by, coupling shell (1) rigid coupling has guide (2), guide (2) sliding connection has sliding shell (3), the upside of sliding shell (3) is provided with equidistant through-hole in circumference, the medial surface of sliding shell (3) is provided with four annular plates of symmetry, the distance between two adjacent annular plates in sliding shell (3) reduces from bottom to top gradually, coupling shell (1)'s inner wall rigid coupling has guide block (4) of symmetric distribution, coupling shell (1)'s inner wall sliding connection have with sliding shell (3) rigid coupling with guide block (4) sliding connection's sliding ring (5), guide (2) with the rigid coupling has first elastic component (6) between sliding ring (5), first elastic component (6) are the spring, guide (2) rigid coupling has coupling sleeve (7), coupling shell (1) has equidistant first fixed connection (8) between first fixed sleeve (8) and fixed sleeve (10), a second elastic piece (101) is fixedly connected between the sliding plug (10) and the adjacent first fixed sleeve (8), the second elastic piece (101) is a tension spring, the connecting shell (1) is fixedly connected with a second equidistant fixed sleeve (11), a first connecting ring (12) is fixedly connected between the first fixed sleeve (8) and the adjacent second fixed sleeve (11), the connecting shell (1) is provided with sand filtering holes, the sand filtering holes formed in the connecting shell (1) are positioned between the first fixed sleeve (8) and the adjacent sliding plug (10), and sealing rings are arranged on the inner ring surface and the outer ring surface of the sliding plug (10) and are used for improving the sealing performance between the sliding plug (10) and the connecting shell (1) and the adjacent first fixed sleeve (8), and a sealing assembly is arranged between the first fixed sleeve (8) and the adjacent second fixed sleeve (11);
the sealing assembly comprises a sealing ring (13), the sealing ring (13) is slidably connected between the first fixing sleeve (8) and the second fixing sleeve (11), a circumferentially equidistant through hole and a chute are formed in the upper side of the first connecting ring (12), the chute of the first connecting ring (12) is located on the upper side of the through hole, a sliding block (14) is slidably connected in the chute of the first connecting ring (12), the sliding block (14) is fixedly connected with the adjacent sealing ring (13), a second connecting ring (141) is fixedly connected between the sliding blocks (14) at the circumferential equidistant intervals, a third connecting ring (15) at the equidistant intervals is sleeved on the connecting sleeve (7), the third connecting ring (15) is located on the upper side of the adjacent first connecting ring (12), a circumferentially equidistant third elastic piece (16) is fixedly connected between the third connecting ring (15) and the adjacent second connecting ring (141), a circumferentially equidistant connecting rod (17) is fixedly connected with the third connecting ring (17) at the equidistant intervals;
the upper side of second fixed cover (11) is provided with spacing subassembly, spacing subassembly is including mount (18) that circumference distributes, circumference distributes mount (18) all rigid coupling in second fixed cover (11), mount (18) sliding connection has stopper (19), stopper (19) are located the upside of first go-between (12) with second go-between (141), mount (18) sliding connection has bracing piece (20), bracing piece (20) with adjacent stopper (19) rigid coupling, bracing piece (20) cover is equipped with fourth elastic component (21), the both ends of fourth elastic component (21) are respectively rigid coupling in adjacent mount (18) and adjacent stopper (19), second fixed cover (11) sliding connection has slide bar (22) that circumference distributes, slide bar (22) with second fixed cover (11) sealing fit, slide bar (22) rigid coupling has wedge plate (23), bracing piece (20) with adjacent wedge plate (24) of mating.
When the sand control screen is used, a worker installs the sand control screen on the lower side of the tail pipe hanger, and drops the sand control screen into an oil well along with the tail pipe hanger, the piston of the oil pump reciprocates up and down along with continuous operation of the oil pump, oil in the oil well intermittently flows upwards, the piston of the oil pump moves upwards, in an initial state, the sealing ring (13) is in sealing fit with the adjacent first fixed sleeve (8) and the adjacent second fixed sleeve (11), after the oil is extracted by the oil pump, the oil of the connecting shell (1) flows upwards, the upper side oil of the sliding plug (10) is discharged from the through hole of the adjacent second fixed sleeve (11), under the action of the oil pump, the sliding plug (10) moves upwards along the connecting shell (1) and the adjacent first fixed sleeve (8), the second elastic piece (101) is gradually stretched, the first fixed sleeve (8) and the connecting shell (1) are in a negative pressure state, and the oil enters between the first fixed sleeve (8) and the connecting shell (1) through the filtering hole of the connecting shell (1);
the oil in the connecting shell (1) flows upwards, when the oil flows, a part of the oil flows upwards in the middle of the connecting sleeve (7), another part of the oil flows upwards outside the connecting sleeve (7), the oil flowing upwards from the outer side of the connecting sleeve (7) flows through the sliding shell (3), in the process of the oil flowing through the sliding shell (3), under the action of the annular plate on the sliding shell (3), resistance is generated at the sliding shell (3) when the oil flows upwards, then the sliding shell (3) slides upwards along the guide piece (2), the sliding shell (3) pushes the sliding ring (5) upwards, the sliding ring (5) slides upwards along the guide block (4), the first elastic piece (6) is compressed, and the four connecting rods (17) are driven to synchronously move upwards when the sliding shell (3) moves upwards;
when the piston of the oil-well pump stops moving upwards, under the action of the elastic force of the first elastic piece (6), the sliding ring (5) and the sliding shell (3) move downwards to reset, the sliding shell (3) drives the third connecting ring (15) to move downwards to reset through the connecting rod (17), meanwhile, under the action of the elastic force of the second elastic piece (101), the sliding plug (10) moves downwards to reset, after the second connecting ring (141) resets, under the action of the elastic force of the fourth elastic piece (21), the limiting block (19) resets along with the second connecting ring, the sealing ring (13) seals a gap between the first fixing sleeve (8) and the second fixing sleeve (11), then the sliding plug (10) moves downwards to reset, the sliding plug (10) moves downwards until being separated from the sliding rod (22), residual oil between the first fixing sleeve (8) and the connecting shell (1) is extruded downwards, the oil flows outwards from the sand filtering holes again, the sand filtering holes of the connecting shell (1) are backflushed, the sand is deposited in the underground at the sand filtering holes of the connecting shell (1) is reduced, and the sand filtering holes of the connecting shell (1) are cleaned.
2. The sand control screen with anti-blocking function for petroleum exploitation according to claim 1, wherein the upper part of the guide member (2) is provided with an inclined surface for guiding a tool to be run into the well, the guide member (2) is provided with circumferentially equidistant through holes, and the lower part of the guide member (2) is provided with a step surface for limiting the sliding shell (3).
3. The sand control screen with anti-blocking function for petroleum exploitation according to claim 1, wherein a limiting ring is arranged on the outer side of the first fixing sleeve (8), and the limiting ring on the first fixing sleeve (8) is used for limiting the adjacent sliding plugs (10).
4. A sand control screen with anti-seize function for oil exploitation according to claim 1, characterized in that a gap is provided between the first fixed sleeve (8) and the adjacent second fixed sleeve (11), the width of the sliding plug (10) being greater than the width of the gap between the first fixed sleeve (8) and the second fixed sleeve (11).
5. The sand control screen with anti-blocking function for petroleum exploitation according to claim 1, wherein the width of the sealing ring (13) is larger than the gap between the first fixed sleeve (8) and the adjacent second fixed sleeve (11), and sealing rings are arranged on the upper side and the lower side of the inner annular surface of the sealing ring (13) for increasing the tightness between the sealing ring (13) and the adjacent first fixed sleeve (8) and the adjacent second fixed sleeve (11).
6. The sand control screen with anti-blocking function for petroleum exploitation according to claim 1, wherein the upper side of the outer ring surface of the second connecting ring (141) and the lower side of the limiting block (19) are both provided with inclined surfaces, so that the second connecting ring (141) can be reset downwards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311047933.1A CN116792064B (en) | 2023-08-21 | 2023-08-21 | Sand control screen pipe with anti-blocking function for petroleum exploitation |
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| CN202311047933.1A CN116792064B (en) | 2023-08-21 | 2023-08-21 | Sand control screen pipe with anti-blocking function for petroleum exploitation |
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| CN116792064B true CN116792064B (en) | 2023-10-27 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001066907A1 (en) * | 2000-03-10 | 2001-09-13 | Nortech Systems Limited | Clean out tool |
| US6382319B1 (en) * | 1998-07-22 | 2002-05-07 | Baker Hughes, Inc. | Method and apparatus for open hole gravel packing |
| CN114412422A (en) * | 2022-03-30 | 2022-04-29 | 纬达石油装备有限公司 | Anti-blocking sand screen for oil well and using method thereof |
| CN114439432A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Hydraulic shaping, filling and sand prevention integrated pipe column and method |
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2023
- 2023-08-21 CN CN202311047933.1A patent/CN116792064B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6382319B1 (en) * | 1998-07-22 | 2002-05-07 | Baker Hughes, Inc. | Method and apparatus for open hole gravel packing |
| WO2001066907A1 (en) * | 2000-03-10 | 2001-09-13 | Nortech Systems Limited | Clean out tool |
| CN114439432A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Hydraulic shaping, filling and sand prevention integrated pipe column and method |
| CN114412422A (en) * | 2022-03-30 | 2022-04-29 | 纬达石油装备有限公司 | Anti-blocking sand screen for oil well and using method thereof |
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| CN116792064A (en) | 2023-09-22 |
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