CN113622860B - Fire drives cable packer and fire drives monitoring tubular column - Google Patents
Fire drives cable packer and fire drives monitoring tubular column Download PDFInfo
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- CN113622860B CN113622860B CN202010381254.8A CN202010381254A CN113622860B CN 113622860 B CN113622860 B CN 113622860B CN 202010381254 A CN202010381254 A CN 202010381254A CN 113622860 B CN113622860 B CN 113622860B
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- central tube
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/243—Combustion in situ
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention relates to a fire drive cable packer and a fire drive monitoring pipe column, wherein the fire drive cable packer comprises an inner pipe and a central pipe, the central pipe is sleeved outside the middle section of the inner pipe at intervals, the intervals form an annular space, and an axial through hole is formed in the side wall of the upper section of the inner pipe. The side wall of the middle section of the inner pipe is provided with a first liquid inlet hole, the side wall of the central pipe is provided with a second liquid inlet hole, and a section of connecting pipe is arranged between the corresponding first liquid inlet hole and the second liquid inlet hole. The outer side of the central tube is sleeved with a rubber cylinder sealing mechanism, an upper piston sleeve, an upper fixing sleeve and a fixing connecting sleeve, the outer side of the fixing connecting sleeve is connected with a locking sleeve through a deblocking pin, the outer sides of the upper piston sleeve, the upper fixing sleeve and the locking sleeve are sleeved with an outer cylinder, and a retaining ring is arranged between the outer cylinder and the locking sleeve. The hydraulic type setting device can realize hydraulic type setting, has more stable setting effect and more reliable sealing effect, and does not influence cable passing in the packer.
Description
Technical Field
The invention relates to the technical field of thickened oil exploitation, in particular to a fire drive cable passing packer and a fire drive monitoring pipe column.
Background
Fireflood is also called in-situ combustion, and refers to an oil extraction method which uses electricity, chemistry and other methods to make the temperature of an oil layer reach the ignition point of crude oil, and injects air or oxygen into the oil layer to make the crude oil in the oil layer continuously burn. The key to successful in-situ combustion is the success of the reservoir ignition. The temperature of the electric igniter for heating the hot air is also an important parameter, so that in some re-ignition drive wells, cables are carried for thermocouple implementation to monitor the bottom hole temperature.
In the implementation process of the fire flooding monitoring pipe column, a good sealing effect of the packer is required in order to improve the fire flooding effect. However, in the prior art, the fire-driven cable packer basically adopts thermal setting, and the swelling agent in the packer is used for swelling at high temperature to realize the setting of the rubber cylinder. However, in the fireflood operation, the actual temperature in the well is affected by multiple factors, and the situation that the expanding agent leaks in advance due to the fact that the actual temperature in the well is too high, so that the packer is not fully set, the setting effect is unstable, and the sealing effect is poor may exist.
Therefore, the inventor provides a fire drive cable packer and a fire drive monitoring pipe column by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a fire drive cable passing packer and a fire drive monitoring pipe column, which can realize hydraulic setting, have more stable setting effect and more reliable sealing effect, and do not influence cable passing in the packer.
The aim of the invention can be achieved by adopting the following technical scheme:
the invention provides a fire drive cable packer, which comprises an inner pipe and a central pipe which are vertically arranged; the outer diameter of the upper section of the inner tube is larger than that of the middle section and the lower section of the inner tube, a central tube is sleeved outside the middle section of the inner tube at intervals, an annular space is formed by the intervals, the upper end of the central tube and the upper section of the inner tube are fixed in a sealing way, an axial through hole communicated with the annular space is formed in the side wall of the upper section of the inner tube along the axial direction of the side wall of the upper section of the inner tube, and a first high-temperature sealing ring is sleeved at the upper end of the axial through hole; at least one first liquid inlet hole is formed in the circumference of the side wall of the middle section of the inner pipe, at least one second liquid inlet hole corresponding to the first liquid inlet hole is formed in the circumference of the side wall of the central pipe, and a section of connecting pipe is fixedly arranged between the corresponding first liquid inlet hole and the second liquid inlet hole in a sealing manner;
the outer side of the central tube is sequentially sleeved with a rubber tube packing mechanism, an upper piston sleeve, an upper fixed sleeve and a fixed connecting sleeve from top to bottom, and the lower end of the rubber tube packing mechanism is connected with the central tube through a setting pin; the upper piston sleeve is positioned above the second liquid inlet hole, the upper fixing sleeve is positioned below the second liquid inlet hole and is fixed with the fixing connecting sleeve, the fixing connecting sleeve is fixed with the central tube, and the outer side of the fixing connecting sleeve is connected with a locking sleeve through a deblocking pin; an outer cylinder is sleeved outside the upper piston sleeve, the upper fixing sleeve and the locking sleeve, the upper end of the outer cylinder is fixed with the lower end of the rubber cylinder sealing mechanism, a retaining ring is arranged between the inner wall of the lower part of the outer cylinder and the outer wall of the locking sleeve, the retaining ring is fixed with the locking sleeve, and the outer cylinder can axially and unidirectionally move upwards and is sleeved on the retaining ring.
In a preferred embodiment of the invention, the inner side of the retaining ring and the outer side of the locking sleeve are provided with corresponding retaining toothed rings, the outer side of the retaining ring and the inner side of the outer cylinder are provided with corresponding retaining toothed rings, a limit step with an enlarged diameter is formed upwards at the upper part of the locking sleeve, and the upper end of the retaining ring can prop against the limit step.
In a preferred embodiment of the invention, the packing element packing mechanism comprises an upper sheath, a packing element and a lower sheath which are sequentially sleeved outside the central tube from top to bottom, wherein the upper end of the upper sheath is fixed with the central tube, the lower sheath is connected with the central tube through a setting pin, and the lower end of the lower sheath is fixed with the upper end of the outer barrel.
In a preferred embodiment of the invention, the fixed connecting sleeve comprises an upper connecting sleeve and a lower connecting sleeve which are fixed up and down, the upper connecting sleeve is fixed with the upper piston sleeve, the lower connecting sleeve is fixed with the central tube in a sealing way, and the outer side of the lower connecting sleeve is connected with the locking sleeve through a deblocking pin; the upper piston sleeve and the upper connecting sleeve are sleeved outside the central tube at intervals, an annular sealing cavity is formed at intervals, the annular sealing cavity is communicated with the inner cavity of the connecting tube, and a third liquid inlet communicated with the annular sealing cavity is formed in the tube wall of the upper connecting sleeve; a lower piston sleeve and a lower fixing sleeve are arranged between the outer wall of the upper connecting sleeve and the inner wall of the outer cylinder in a sealing manner, the lower piston sleeve is positioned above the third liquid inlet, and the lower fixing sleeve is positioned below the third liquid inlet; a certain moving distance is reserved between the upper end of the lower piston sleeve and the lower end of the upper fixed sleeve, a stepped part with a reduced diameter is formed upwards on the inner wall of the outer cylinder and between the upper piston sleeve and the upper fixed sleeve, and the upper end of the lower piston sleeve is propped against the stepped part.
In a preferred embodiment of the invention, at least two grooves are circumferentially arranged on the outer wall of the lower part of the central tube at intervals, at least two mounting holes corresponding to the grooves are arranged on the wall of the lower part of the lower connecting sleeve at intervals, and a locking piece is embedded in each mounting hole and the corresponding groove.
In a preferred embodiment of the invention, the outer cylinder comprises an upper liquid cylinder sleeve and a lower liquid cylinder sleeve, wherein the outer wall of the lower end of the upper liquid cylinder sleeve is in threaded fixation with the inner wall of the upper end of the lower liquid cylinder sleeve, the lower end surface of the upper liquid cylinder sleeve forms a step part, and the upper end of the upper liquid cylinder sleeve is fixed with the lower end of the rubber cylinder sealing mechanism.
In a preferred embodiment of the invention, the central tube comprises an upper central tube and a lower central tube which are connected up and down, the upper end of the upper central tube is fixed with the upper section of the inner tube in a sealing way, the second liquid inlet hole is formed in the upper central tube, and the rubber cylinder sealing mechanism, the upper piston sleeve, the upper fixing sleeve and the fixing connecting sleeve are all sleeved on the outer side of the upper central tube.
In a preferred embodiment of the invention, a supporting sleeve is sleeved and fixed on the inner side of the upper end of the lower central tube, the supporting sleeve comprises a supporting ring fixed with the lower central tube and a plurality of supporting blocks circumferentially arranged on the inner wall of the supporting ring at intervals, and each supporting block is fixedly connected with the inner tube; the length direction of each supporting block extends along the axial direction of the supporting ring and upwards extends to the outer side of the upper end of the supporting ring; the inner wall of the lower end of the upper central tube is attached to the outer wall of the upper end of the supporting block, and the lower end face of the central tube is abutted against the upper end face of the supporting ring.
In a preferred embodiment of the present invention, the inner tube includes an upper connecting tube, a middle connecting tube and a lower connecting tube which are sequentially fixed from top to bottom, the axial through hole is formed in the side wall of the upper connecting tube, the central tube is sleeved outside the middle connecting tube at intervals, the upper end of the central tube is fixed with the lower end of the upper connecting tube in a sealing manner, and the first liquid inlet hole is formed in the side wall of the middle connecting tube.
In a preferred embodiment of the invention, a pressing sleeve is sleeved outside the lower end of the upper connecting pipe at intervals, the intervals form an annular installation area, the upper end of the central pipe stretches into the annular installation area, and the upper end outer wall and the upper end inner wall of the central pipe are respectively in threaded connection with the lower end inner wall of the pressing sleeve and the lower end outer wall of the upper connecting pipe; the second high-temperature sealing ring is sleeved on the annular mounting area and is positioned above the central tube, the inner wall of the upper end of the pressing sleeve is inwards convexly provided with a limiting convex ring, and the lower end face of the limiting convex ring is abutted against the second high-temperature sealing ring.
In a preferred embodiment of the invention, a stepped hole with an enlarged aperture is formed at the upper part of the axial through hole, and the first high-temperature sealing ring is sleeved in the stepped hole and abuts against the lower hole shoulder of the stepped hole; a compression ring is sleeved and fixed in the stepped hole and above the first high-temperature sealing ring, and the lower end of the compression ring is abutted against the first high-temperature sealing ring.
The invention also provides a fireflood monitoring tubular column, which comprises:
the fire drives the cable packer;
the constant pressure ball seat is connected to the lower end of the inner pipe and can be used for seating a sealing ball;
the screen pipe is connected to the lower end of the constant pressure ball seat;
and the lower end of the cable sequentially passes through the axial through hole and the annular space and extends downwards to the position of the screen pipe, and the lower end of the cable is connected with a thermocouple and is arranged opposite to the screen pipe.
In a preferred embodiment of the invention, the cable system further comprises a cable-passing anchor connected above the fire-driven cable-passing packer, through which the cable passes.
In a preferred embodiment of the invention, a cable protector is also included, connected above the over-cable anchor, through which the cable passes.
Therefore, the hydraulic type setting can be realized through the cooperation of the connecting pipe, the upper piston sleeve, the upper fixed sleeve and the packing element packing mechanism, compared with the thermal type setting in the prior art, the thermal type setting cannot be stably set due to the fact that the underground actual temperature is influenced by multiple factors, and the pressure of the liquid is controllable during hydraulic type setting, so that the hydraulic type setting is adopted, the setting effect is more stable, the sealing effect is more reliable, and the service life and the sealing effect of the packer in the fireflood monitoring tubular column are improved. Meanwhile, the cable passing channel is formed by the axial through hole and the annular space, the sealing property of the cable passing channel is ensured by the sealing and fixing of the connecting pipe, the inner pipe and the central pipe and the arrangement of the first high-temperature sealing piece, the cable passing in the packer is not influenced during liquid pumping, and a certain protection effect is achieved on the cable. The whole packer is simple in operation, reliable in sealing effect, simple in setting principle, and high in unlocking success rate, and the pipe column can be unlocked by lifting.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention.
Wherein:
fig. 1: the invention provides a first structural schematic diagram of a fire drive cable packer.
Fig. 2: the fire driving cable packer is provided with a second structural schematic diagram.
Fig. 3: the invention provides a partial enlarged view of a fire drive cable packer.
Fig. 4: is a cross-sectional view taken along the A-A direction in fig. 2.
Fig. 5: is a cross-sectional view taken along the direction B-B in fig. 2.
Fig. 6: the structure of the support sleeve is schematically shown.
Fig. 7: the invention provides a structural schematic diagram of a fireflood monitoring pipe column.
Reference numerals illustrate:
100. driving the fire through the cable packer;
1. an inner tube; 11. an upper connecting pipe; 111. an axial through hole; 112. a first high temperature seal ring; 113. a clamp ring; 114. a second high temperature seal ring; 115. pressing the sleeve; 1151. a limit convex ring; 12. a middle connecting pipe; 121. a connecting pipe; 13. a lower connecting pipe;
2. a central tube; 21. an upper center tube; 22. a lower center tube; 23. an annular space; 24. a support sleeve; 241. a support ring; 242. a support block;
3. a rubber cylinder packing mechanism; 31. a jacket is arranged; 32. a rubber cylinder; 33. a lower sheath; 331. setting pins;
4. an upper piston sleeve;
5. an upper fixing sleeve; 51. an upper annular region;
6. fixing the connecting sleeve; 61. an upper connecting sleeve; 611. a third liquid inlet hole; 612. an annular seal cavity; 62. a lower connecting sleeve; 621. a locking sleeve; 6211. a limit step; 622. deblocking the pin; 623. a retaining ring; 624. a locking piece;
7. an outer cylinder; 71. feeding a liquid cylinder sleeve; 711. a step part; 72. a liquid cylinder sleeve is arranged;
8. a lower piston sleeve; 81. a lower annular region;
9. a lower fixing sleeve;
200. a cable; 201. a thermocouple;
300. a cable protector;
400. a cable anchor;
500. constant pressure ball seat; 501. a sealing ball;
600. and (5) a screen pipe.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the present embodiment provides a fire-driven cable packer 100 including an inner pipe 1 and a center pipe 2 which are vertically arranged. Wherein, the upper segment external diameter of inner tube 1 is greater than the external diameter of middle section and hypomere of inner tube 1, and center tube 2 spacer sleeve establishes in the middle section outside of inner tube 1, and this interval constitutes annular space 23, and the upper end of center tube 2 is sealed fixed with the upper segment of inner tube 1, has offered the axial through-hole 111 with annular space 23 intercommunication along its axial in the upper segment lateral wall of inner tube 1 to the upper end cover at axial through-hole 111 is equipped with first high temperature sealing ring 112. At least one first liquid inlet hole is circumferentially formed in the side wall of the middle section of the inner pipe 1, at least one second liquid inlet hole corresponding to the first liquid inlet hole is circumferentially formed in the side wall of the central pipe 2, and a section of connecting pipe 121 is fixedly arranged between the corresponding first liquid inlet hole and the second liquid inlet hole in a sealing mode.
The outer side of the central tube 2 is sequentially sleeved with a rubber packing mechanism 3, an upper piston sleeve 4, an upper fixed sleeve 5 and a fixed connecting sleeve 6 from top to bottom, and the lower end of the rubber packing mechanism 3 is connected with the central tube 2 through a setting pin 331. The upper piston sleeve 4 is positioned above the second liquid inlet hole, the upper fixed sleeve 5 is positioned below the second liquid inlet hole and is fixed with the fixed connecting sleeve 6, the fixed connecting sleeve 6 is fixed with the central tube 2, and the outer side of the fixed connecting sleeve 6 is connected with a locking sleeve 621 through a deblocking pin 622. An outer cylinder 7 is sleeved outside the upper piston sleeve 4, the upper fixing sleeve 5 and the locking sleeve 621, the upper end of the outer cylinder 7 is fixed with the lower end of the rubber packing mechanism 3, a retaining ring 623 is arranged between the inner wall of the lower part of the outer cylinder 7 and the outer wall of the locking sleeve 621, the retaining ring 623 is fixed with the locking sleeve 621, and the outer cylinder 7 can axially and unidirectionally move upwards and is sleeved on the retaining ring 623.
Specifically, the connecting pipe 121 is generally disposed along the radial direction of the inner pipe 1, and the connecting pipe 121 is radially inserted into the first liquid inlet hole and the corresponding second liquid inlet hole and welded to achieve sealing fixation. The number of the first liquid inlet holes and the second liquid inlet holes is the same as the number of the connecting pipes 121, and the specific number is determined according to the needs, for example, two connecting pipes 121 are provided in the present embodiment, and the cable 200 can pass through the gaps between the connecting pipes 121. During installation, the cable 200 penetrates through the axial through hole 111, passes through the annular space 23 and then penetrates out of the lower end of the annular space 23, and the tightness of the upper end of the axial through hole 111 is ensured by sleeving the first high-temperature sealing ring 112 at the upper end of the axial through hole 111.
In use, the lower end of the inner tube 1 is connected with a constant pressure ball seat 500, and a sealing ball 501 is put into the inner tube 1 to seal the bottom of the inner tube 1. After the pipe column is put into the well depth position according to the design position, liquid is pumped into the inner pipe 1, the liquid enters the area between the upper piston sleeve 4 and the upper fixed sleeve 5 through the connecting pipe 121, and the upper fixed sleeve 5 is fixed, so that the liquid pushes the upper piston sleeve 4 upwards. The setting pin 331 is sheared under the action of high-pressure fluid, then the liquid pushes the upper piston sleeve 4 to move upwards, and then the packing element packing mechanism 3 and the outer cylinder 7 are pushed to move upwards together, so that the setting of the packing element packing mechanism 3 is realized, the setting of the retaining ring 623 can effectively ensure that the whole outer cylinder 7 cannot retreat after moving upwards, the packing element packing mechanism 3 is still in a compressed state after the pressure is withdrawn, and the deblocking phenomenon is prevented. After setting, the sealing ball 501 is continuously pressed, so that the inner pipe 1 is penetrated up and down, and the fireflood operation can be performed. When the inner tube 1 is lifted up to cut off the setting pin 331 when the deblocking is needed, the deblocking can be realized.
From this, cable packer 100 is passed through to fire in this embodiment can realize hydraulic formula setting through the cooperation of connecting pipe 121, go up piston cover 4, go up fixed cover 5 and packing element mechanism 3, compare in prior art thermal formula setting, thermal formula setting is unable to stabilize setting because of the actual temperature in the pit receives the multi-factor influence, and the pressure of beating the liquid is controllable when hydraulic formula setting, consequently adopts hydraulic formula setting, it is more stable to sit the setting effect, it is more reliable to seal the effect, the life and the sealed effect of packer in the fire monitoring tubular column have been improved. Meanwhile, in the embodiment, the cable passing channel is formed by the axial through hole 111 and the annular space 23, and the cable passing channel is sealed and fixed with the inner pipe 1 and the central pipe 2 by the connecting pipe 121 and is provided with a first high-temperature sealing piece to ensure the tightness of the cable passing channel, so that the cable passing 200 in the packer is not influenced during liquid filling, and a certain protection effect is achieved on the cable 200. The whole packer is simple in operation, reliable in sealing effect, simple in setting principle, and high in unlocking success rate, and the pipe column can be unlocked by lifting.
In a specific implementation manner, corresponding retaining tooth rings are arranged on the inner side of the retaining ring 623 and the outer side of the locking sleeve 621, corresponding retaining tooth rings are arranged on the outer side of the retaining ring 623 and the inner side of the outer cylinder 7, a limit step 6211 with an enlarged diameter is formed upwards on the upper portion of the locking sleeve 621, and the upper end of the retaining ring 623 can prop against the limit step 6211. The structure of the retaining ring 623 is conventional and will not be described in detail herein.
In practical application, as shown in fig. 1 and 2, the packing element packing mechanism 3 includes an upper sheath 31, a packing element 32 and a lower sheath 33 which are sequentially sleeved outside the central tube 2 from top to bottom, the upper end of the upper sheath 31 is fixed with the central tube 2, the lower sheath 33 is connected with the central tube 2 through a setting pin 331, and the lower end of the lower sheath 33 is fixed with the upper end of the outer tube 7. Generally, the upper end inner wall of the upper sheath 31 is screwed with the outer wall of the center tube 2, and the lower end outer wall of the lower sheath 33 is screwed with the upper end inner wall of the outer tube 7.
In order to further secure the stability of the setting, as shown in fig. 2 and 3, the fixed connection sleeve 6 includes an upper connection sleeve 61 and a lower connection sleeve 62 which are fixed up and down, the upper connection sleeve 61 is fixed with the upper piston sleeve 4, the lower connection sleeve 62 is sealed and fixed with the central tube 2, and the outer side of the lower connection sleeve 62 is connected with the locking sleeve 621 through a deblocking pin 622. The upper piston sleeve 4 and the upper connecting sleeve 61 are sleeved outside the central tube 2 at intervals, an annular sealing cavity 612 is formed at intervals, the annular sealing cavity 612 is communicated with the inner cavity of the connecting tube 121, and a third liquid inlet hole 611 communicated with the annular sealing cavity 612 is formed in the tube wall of the upper connecting sleeve 61. A lower piston sleeve 8 and a lower fixed sleeve 9 are arranged between the outer wall of the upper connecting sleeve 61 and the inner wall of the outer barrel 7 in a sealing sleeve manner, the lower piston sleeve 8 is positioned above the third liquid inlet, and the lower fixed sleeve 9 is positioned below the third liquid inlet. A certain moving distance is reserved between the upper end of the lower piston sleeve 8 and the lower end of the upper fixed sleeve 5, a stepped part 711 with a reduced diameter is formed upwards on the inner wall of the outer cylinder 7 and between the upper piston sleeve 4 and the upper fixed sleeve 5, and the upper end of the lower piston sleeve 8 is propped against the stepped part 711.
The upper outer wall of the upper connecting sleeve 61 is generally in threaded connection with the lower inner wall of the lower fixing sleeve 9, and the lower outer wall of the upper connecting sleeve 61 is generally in threaded connection with the upper inner wall of the lower connecting sleeve 62. The lower outer wall of the upper fixing sleeve 5 is in sealing contact with the inner wall of the outer cylinder 7, the lower inner wall of the upper fixing sleeve is in sealing and fixing with the outer wall of the upper connecting sleeve 61, generally, the upper part of the upper fixing sleeve 5 is tubular and is arranged around the outer wall of the central tube 2 at intervals, an upper annular area 51 is formed at intervals, and the second liquid inlet hole is arranged opposite to the upper annular area 51. The upper end of the upper fixed sleeve 5 is propped against the lower end face of the upper piston sleeve 4, the outer wall of the lower part and the inner wall of the lower part of the upper piston sleeve 4 are respectively in sealing contact with the inner wall of the outer cylinder 7 and the outer wall of the central tube 2, generally the upper part of the upper piston sleeve 4 is tubular and is arranged around the outer wall of the central tube 2 at intervals, and the upper end of the upper piston sleeve 4 is propped against the lower end face of the lower sheath 33.
The upper outer wall and the upper inner wall of the lower piston sleeve 8 are respectively in sealing contact with the inner wall of the outer cylinder 7 and the outer wall of the upper connecting sleeve 61, generally, the lower part of the lower piston sleeve 8 is tubular and is arranged around the outer wall of the upper connecting sleeve 61 at intervals, a lower annular area 81 is formed at intervals, and a third liquid inlet 611 is arranged opposite to the lower annular area 81. The lower end of the lower piston sleeve 8 is abutted against the upper end face of the lower fixing sleeve 9, the outer wall and the inner wall of the lower fixing sleeve 9 are respectively in sealing contact with the inner wall of the outer cylinder 7 and the outer wall of the upper connecting sleeve 61, and the lower end of the lower fixing sleeve 9 can be abutted against the upper end of the lower connecting sleeve 62 after liquid is pumped.
Thus, when liquid is pumped into the inner tube 1, a part of liquid enters the upper annular area 51 after passing through the connecting tube 121, and pushes the upper piston sleeve 4 upwards, so that after the setting pin 331 is sheared, the upper piston sleeve 4 pushes the lower jacket 33 upwards, and the rubber cylinder 32 is set. Another part of liquid enters the lower annular region 81 after passing through the annular sealing cavity 612 and the third liquid inlet 611, the lower fixing sleeve 9 is fixed when being pushed downwards to abut against the upper end of the lower connecting sleeve 62, the liquid pushes the lower piston sleeve 8 upwards, and the lower piston sleeve 8 simultaneously pushes the step part 711 to push the outer cylinder 7 to move upwards together, so that the upper sheath 31 is pushed upwards together. Therefore, through the combined action of the two stages of pistons of the upper piston sleeve 4 and the lower piston sleeve 8, two pushing forces are generated on the upper jacket 31, so that the setting force of the rubber cylinder 32 is larger, and the stability of setting is effectively ensured.
Further, in order to facilitate the fixation of the lower connecting sleeve 62 and the central tube 2, as shown in fig. 2, at least two grooves are circumferentially spaced on the outer wall of the lower portion of the central tube 2, at least two mounting holes corresponding to the grooves are spaced on the wall of the lower portion of the lower connecting sleeve 62, and a locking piece 624 is embedded in each mounting hole and the corresponding groove. The number of the locking pieces 624 is determined according to the need, for example, four locking pieces 624 are provided in the present embodiment.
For easy processing and installation, as shown in fig. 2 and 3, the outer cylinder 7 includes an upper cylinder sleeve 71 and a lower cylinder sleeve 72, the outer wall of the lower end of the upper cylinder sleeve 71 is screwed with the inner wall of the upper end of the lower cylinder sleeve 72, the lower end surface of the upper cylinder sleeve 71 constitutes the above-mentioned step part 711, and the upper end of the upper cylinder sleeve 71 is fixed with the lower end of the packing element 3.
As shown in fig. 1 and 2, the central tube 2 includes an upper central tube 21 and a lower central tube 22 which are connected up and down, the upper end of the upper central tube 21 is fixed with the upper section of the inner tube 1 in a sealing manner, the second liquid inlet is formed on the upper central tube 21, and the packing element sealing mechanism 3, the upper piston sleeve 4, the upper fixing sleeve 5 and the fixing connecting sleeve 6 are all sleeved on the outer side of the upper central tube 21.
In practical application, since the annular space 23 exists between the central tube 2 and the inner tube 1, and the whole central tube 2 is relatively long, in order to play a supporting role on the central tube 2 and ensure the stability of the whole structure, as shown in fig. 2, 5 and 6, a supporting sleeve 24 is sleeved and fixed on the inner side of the upper end of the lower central tube 22, the supporting sleeve 24 comprises a supporting ring 241 fixed with the lower central tube 22 and a plurality of supporting blocks 242 circumferentially spaced on the inner wall of the supporting ring 241, and each supporting block 242 is fixedly connected with the inner tube 1. The length direction of each support block 242 extends in the axial direction of the support ring 241 and extends upward to the outside of the upper end of the support ring 241. The lower end inner wall of the upper central tube 21 is attached to the upper end outer wall of the support block 242, and the lower end surface of the central tube 2 abuts against the upper end surface of the support ring 241.
The outer wall of the support ring 241 is generally screwed to the inner wall of the upper end of the lower central tube 22, and the inner wall of each support block 242 is welded to the outer wall of the inner tube 1. For the number of the supporting blocks 242, for example, three supporting blocks 242 are provided in this embodiment, and the cable 200 can pass through the gaps between the supporting blocks 242.
Further, for convenience in processing and installation, as shown in fig. 1 and 2, the inner tube 1 includes an upper connecting tube 11, a middle connecting tube 12 and a lower connecting tube 13 which are sequentially fixed from top to bottom, an axial through hole 111 is formed in the side wall of the upper connecting tube 11, a central tube 2 is arranged on the outer side of the middle connecting tube 12 in a spaced mode, the upper end of the central tube 2 is fixed with the lower end of the upper connecting tube 11 in a sealing mode, and a first liquid inlet hole is formed in the side wall of the middle connecting tube 12.
The upper end and the lower end of the middle connecting pipe 12 are respectively sealed and fixed with the upper connecting pipe 11 and the lower connecting pipe 13 through tubing buckles, and the structure of the tubing buckles is the prior art, and the tubing buckles have the sealing function and are not described herein.
In order to facilitate the sealing and fixing of the lower end of the upper connecting pipe 11 and the upper end of the central pipe 2, as shown in fig. 2, a pressing sleeve 115 is sleeved outside the lower end of the upper connecting pipe 11 at intervals, the intervals form an annular installation area, the upper end of the central pipe 2 stretches into the annular installation area, and the outer wall and the inner wall of the upper end of the central pipe 2 are respectively in threaded connection with the inner wall of the lower end of the pressing sleeve 115 and the outer wall of the lower end of the upper connecting pipe 11. The second high-temperature sealing ring 114 is sleeved in the annular mounting area and is positioned above the central tube 2, the inner wall of the upper end of the pressing sleeve 115 is inwards convexly provided with a limiting convex ring 1151, and the lower end face of the limiting convex ring 1151 abuts against the second high-temperature sealing ring 114. The inner wall of the limiting bulge loop 1151 is attached to the outer wall of the upper connecting tube 11, and the second high-temperature sealing ring 114 can be pressed by the pressing sleeve 115, so that the tightness of the second high-temperature sealing ring is ensured.
Further, in order to compress the first high temperature sealing ring 112, a stepped hole with an enlarged aperture is formed at the upper portion of the axial through hole 111, and the first high temperature sealing ring 112 is sleeved in the stepped hole and abuts against the lower hole shoulder of the stepped hole. A clamp ring 113 is sleeved and fixed in the stepped hole and above the first high-temperature seal ring 112, and the lower end of the clamp ring 113 abuts against the first high-temperature seal ring 112.
The outer wall of the general clamp ring 113 is fixed with the hole wall of the stepped hole by screw threads to realize the compression of the first high-temperature sealing element, when in use, after the cable 200 passes through the axial through hole 111 and the annular space 23, the upper end of the cable 200 is sleeved with the first high-temperature sealing ring 112 and the clamp ring 113 in sequence, and the clamp ring 113 is fixed with the upper connecting pipe 11, so that the tightness of a cable passage can be ensured.
Further, as shown in fig. 7, this embodiment further provides a fire drive monitoring string, including:
the fire drives through the cable packer 100 as described above;
the constant pressure ball seat 500 is connected to the lower end of the inner tube 1, and a sealing ball 501 can be located on the constant pressure ball seat 500;
a screen 600 connected to the lower end of the constant pressure ball seat 500;
and a cable 200, the lower end of the cable 200 passes through the axial through hole 111 and the annular space 23 in sequence and extends downwards to the position of the screen 600, and a thermocouple 201 is connected to the lower end of the cable 200 and is arranged opposite to the screen 600.
The sealing ball 501 may be put into the pipe before the pipe is put into the pipe, or may be put into the pipe before the pipe is put into the pipe and the pipe is pumped. The valve core of the constant pressure ball seat 500 can be knocked off when the hydraulic pressure reaches a certain value, and the structure of the specific constant pressure ball seat 500 is the prior art and is not described herein.
Like this, after the whole tubular column is down to the appointed position in the pit, beat liquid in to interior pipe 1, alright realize packing element 32 setting, later continue to beat and press and beat sealing ball 501 and just can make tubular column link up from top to bottom, carry out the fireflood operation, through the effect of cable 200 and thermocouple 201 alright real-time supervision bottom hole temperature this moment. When the operation is finished and the deblocking is needed, the pipe column is directly lifted, and the method is simple and convenient.
In practice, to effectively secure the tubing string, the entire tubing string also includes a cable passing anchor 400 connected above the fireflood cable packer 100, as shown in FIG. 7, with the cable 200 passing through the cable anchor 400. To further protect the cable 200, the entire string also includes a cable protector 300 attached above the over-cable anchor 400, with the cable 200 passing through the cable protector 300. The construction of the over-cable anchor 400 and the cable protector 300 is conventional and will not be described in detail herein.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (12)
1. The fire drive cable packer is characterized by comprising an inner pipe and a central pipe which are vertically arranged;
the outer diameter of the upper section of the inner tube is larger than that of the middle section and the lower section of the inner tube, the central tube is sleeved outside the middle section of the inner tube at intervals, an annular space is formed by the intervals, the upper end of the central tube and the upper section of the inner tube are fixed in a sealing manner, an axial through hole communicated with the annular space is formed in the side wall of the upper section of the inner tube along the axial direction of the side wall of the upper section of the inner tube, and a first high-temperature sealing ring is sleeved at the upper end of the axial through hole;
at least one first liquid inlet hole is formed in the circumference of the side wall of the middle section of the inner tube, at least one second liquid inlet hole corresponding to the first liquid inlet hole is formed in the circumference of the side wall of the central tube, and a section of connecting pipe is fixedly arranged between the corresponding first liquid inlet hole and the corresponding second liquid inlet hole in a sealing manner;
the outer side of the central tube is sequentially sleeved with a rubber packing mechanism, an upper piston sleeve, an upper fixed sleeve and a fixed connecting sleeve from top to bottom, and the lower end of the rubber packing mechanism is connected with the central tube through a setting pin; the upper piston sleeve is positioned above the second liquid inlet hole, the upper fixing sleeve is positioned below the second liquid inlet hole and is fixed with the fixing connecting sleeve, the fixing connecting sleeve is fixed with the central tube, and the outer side of the fixing connecting sleeve is connected with a locking sleeve through a deblocking pin; an outer cylinder is sleeved outside the upper piston sleeve, the upper fixing sleeve and the locking sleeve, the upper end of the outer cylinder is fixed with the lower end of the rubber cylinder packing mechanism, a retaining ring is arranged between the inner wall of the lower part of the outer cylinder and the outer wall of the locking sleeve, the retaining ring is fixed with the locking sleeve, and the outer cylinder can axially and unidirectionally move upwards and is sleeved on the retaining ring;
the central tube comprises an upper central tube and a lower central tube which are connected up and down, the upper end of the upper central tube is fixed with the upper section of the inner tube in a sealing way, the second inlet liquid Kong Kaishe is arranged on the upper central tube, and the rubber cylinder sealing mechanism, the upper piston sleeve, the upper fixing sleeve and the fixing connecting sleeve are all sleeved on the outer side of the upper central tube;
a supporting sleeve is sleeved and fixed on the inner side of the upper end of the lower central tube, the supporting sleeve comprises a supporting ring fixed with the lower central tube and a plurality of supporting blocks circumferentially arranged on the inner wall of the supporting ring at intervals, and each supporting block is fixedly connected with the inner tube;
the length direction of each supporting block extends along the axial direction of the supporting ring and upwards extends to the outer side of the upper end of the supporting ring; the inner wall of the lower end of the upper central tube is attached to the outer wall of the upper end of the supporting block, and the lower end face of the central tube abuts against the upper end face of the supporting ring.
2. The fire driven cable packer according to claim 1, wherein,
the inner side of the retaining ring and the outer side of the locking sleeve are provided with corresponding retaining toothed rings, the outer side of the retaining ring and the inner side of the outer cylinder are provided with corresponding retaining toothed rings, a limit step with an enlarged diameter is formed upwards at the upper part of the locking sleeve, and the upper end of the retaining ring can prop against the limit step.
3. The fire driven cable packer according to claim 1, wherein,
the packing element seals and separates the mechanism and includes from last cover to cover down in proper order establish last sheath, packing element and the lower sheath in the center tube outside, the upper end of going up the sheath with the center tube is fixed, the lower sheath passes through the setting pin with the center tube is connected, just the lower extreme of lower sheath with the upper end of urceolus is fixed.
4. The fire driven cable packer according to claim 3, wherein,
the fixed connecting sleeve comprises an upper connecting sleeve and a lower connecting sleeve which are fixed up and down, the upper connecting sleeve is fixed with an upper piston sleeve, the lower connecting sleeve is fixed with the central tube in a sealing way, and the outer side of the lower connecting sleeve is connected with the locking sleeve through the deblocking pin; the upper piston sleeve and the upper connecting sleeve are sleeved outside the central tube at intervals, an annular sealing cavity is formed at the intervals, the annular sealing cavity is communicated with the inner cavity of the connecting tube, and a third liquid inlet communicated with the annular sealing cavity is formed in the tube wall of the upper connecting sleeve;
a lower piston sleeve and a lower fixing sleeve are arranged between the outer wall of the upper connecting sleeve and the inner wall of the outer cylinder in a sealing sleeve manner, the lower piston sleeve is positioned above the third liquid inlet hole, and the lower fixing sleeve is positioned below the third liquid inlet hole; a certain moving distance is reserved between the upper end of the lower piston sleeve and the lower end of the upper fixed sleeve, a stepped part with a reduced diameter is formed upwards on the inner wall of the outer cylinder and between the upper piston sleeve and the upper fixed sleeve, and the upper end of the lower piston sleeve is propped against the stepped part.
5. The fire driven cable packer according to claim 4 wherein,
at least two grooves are circumferentially arranged on the outer wall of the lower part of the central tube at intervals, at least two mounting holes corresponding to the grooves are arranged on the wall of the lower part of the lower connecting sleeve at intervals, and a locking block is embedded in each mounting hole and the corresponding groove.
6. The fire driven cable packer according to claim 4 wherein,
the outer cylinder comprises an upper liquid cylinder sleeve and a lower liquid cylinder sleeve, wherein the outer wall of the lower end of the upper liquid cylinder sleeve is in threaded fixation with the inner wall of the upper end of the lower liquid cylinder sleeve, the lower end face of the upper liquid cylinder sleeve forms the step part, and the upper end of the upper liquid cylinder sleeve is fixed with the lower end of the rubber cylinder sealing mechanism.
7. The fire driven cable packer according to claim 1, wherein,
the inner tube includes from last takeover, middle takeover and the takeover of fixing down in proper order, axial through-hole is seted up in the lateral wall of takeover, the center tube spacer sleeve is established the outside of middle takeover, just the upper end of center tube with the lower extreme of takeover is sealed fixed, first feed liquor Kong Kaishe is in on the lateral wall of middle takeover.
8. The fire driven cable packer according to claim 7, wherein,
a pressing sleeve is sleeved outside the lower end of the upper connecting pipe at intervals, the intervals form an annular installation area, the upper end of the central pipe stretches into the annular installation area, and the outer wall of the upper end and the inner wall of the upper end of the central pipe are respectively in threaded connection with the inner wall of the lower end of the pressing sleeve and the outer wall of the lower end of the upper connecting pipe;
the annular installation area is internally provided with a second high-temperature sealing ring in a sleeved mode, the inner wall of the upper end of the pressing sleeve is inwards protruded to form a limiting convex ring, and the lower end face of the limiting convex ring abuts against the second high-temperature sealing ring.
9. The fire driven cable packer according to claim 1, wherein,
the upper part of the axial through hole is provided with a stepped hole with an enlarged aperture, and the first high-temperature sealing ring is sleeved in the stepped hole and abuts against the lower hole shoulder of the stepped hole;
a compression ring is sleeved and fixed in the stepped hole and above the first high-temperature sealing ring, and the lower end of the compression ring abuts against the first high-temperature sealing ring.
10. A fireflood monitoring string, comprising:
the fire driven cable packer of any one of claims 1-9;
the constant pressure ball seat is connected to the lower end of the inner tube and can be used for seating a sealing ball;
the screen pipe is connected to the lower end of the constant pressure ball seat;
and the lower end of the cable sequentially penetrates through the axial through hole and the annular space and extends downwards to the position of the screen pipe, and the lower end of the cable is connected with a thermocouple and is opposite to the screen pipe.
11. A fireflood monitoring string as claimed in claim 10, wherein,
and a cable passing anchor connected above the fire-driven cable passing packer through which the cable passes.
12. A fireflood monitoring string as claimed in claim 11, wherein,
further comprising a cable protector connected above the over-cable anchor through which the cable passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381254.8A CN113622860B (en) | 2020-05-08 | 2020-05-08 | Fire drives cable packer and fire drives monitoring tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381254.8A CN113622860B (en) | 2020-05-08 | 2020-05-08 | Fire drives cable packer and fire drives monitoring tubular column |
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| Publication Number | Publication Date |
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| CN113622860A CN113622860A (en) | 2021-11-09 |
| CN113622860B true CN113622860B (en) | 2023-07-25 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834175A (en) * | 1988-09-15 | 1989-05-30 | Otis Engineering Corporation | Hydraulic versa-trieve packer |
| US5743333A (en) * | 1996-05-03 | 1998-04-28 | Baker Hughes Incorporated | External casing packer with element end sleeve to collar retainer and method |
| CN101539011B (en) * | 2009-04-30 | 2010-09-29 | 辽河石油勘探局 | Fire flood eclectic ignition device |
| CN203847085U (en) * | 2014-04-02 | 2014-09-24 | 中国石油天然气股份有限公司 | Inclined shaft oil in-situ combustion layer continuous tube electric ignition tubular column |
| CN204457575U (en) * | 2014-12-31 | 2015-07-08 | 中国石油天然气股份有限公司 | Fireflood cable-passing packer |
| CN106121579B (en) * | 2016-09-06 | 2018-08-21 | 中国石油化工股份有限公司 | Bi-directional compression hydraulic setting is without anchoring packer and its application method |
| CN208966257U (en) * | 2018-08-24 | 2019-06-11 | 中国石油天然气股份有限公司 | It is layered fireflood Inter-zonal packing device |
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2020
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