CN116066000A - Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof - Google Patents
Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof Download PDFInfo
- Publication number
- CN116066000A CN116066000A CN202111293767.4A CN202111293767A CN116066000A CN 116066000 A CN116066000 A CN 116066000A CN 202111293767 A CN202111293767 A CN 202111293767A CN 116066000 A CN116066000 A CN 116066000A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- sand blasting
- wall
- outer cylinder
- slotting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a sleeve sand blasting slotting cavity-making pipe column and a shaping operation method thereof, wherein the pipe column comprises a hydraulic reducing ball centralizer, a reverse circulation well washing valve and a hydraulic sand blasting slotting device which are arranged from top to bottom in sequence; the sleeve-changing and shaping operation method is completed by eight steps of pipe column assembly and lowering, wellhead device assembly and ground pumping system connection, sleeve sand blasting and slotting, sleeve outer cavity building operation, pipe column lifting, sleeve shaping, well dredging verification, sleeve reinforcing and plugging, and well completion in sequence; when the pipe column is used for reducing and shaping the oil field well repairing sleeve, the deformed section sleeve can be longitudinally slotted, stratum cuttings outside the sleeve can be effectively cleaned, external stress borne by the sleeve is removed, preconditions are provided for shaping the sleeve, and the shaping success rate is effectively improved; in addition, the casing string plugging device is not only suitable for casing string operation requirements with different inner diameters in structural design, but also can solve the problem of possible string plugging.
Description
Technical Field
The invention relates to the technical field of oilfield workover operation, in particular to a sleeve sand blasting, slotting and cavity making tubular column and a shaping operation method thereof.
Background
With the development of the oil field entering the middle and later stages, the sleeve damage proportion of oil-water wells of the oil field at home and abroad is increased year by year, and the serious sleeve damage proportion of the oil field can reach more than 25 percent. The sleeve damage type comprises: the oil-water well is corroded, the sleeve is reduced in diameter, the sleeve is broken (broken and staggered), the normal production channel of the oil-water well is damaged, the oil-water well is produced in a disease way or is stopped thoroughly, and the recovery ratio of an oil field is seriously affected. Wherein: the main reason for the deformation of the casing is that the casing is extruded by the formation stress generated by the peristaltic movement of the formation mudstone of the casing when the formation mudstone swells with water or the formation sliding, the casing production drift diameter is recovered in the well repairing process generally through the shaping of the expansion sleeve of a mechanical or hydraulic pipe expander, but the casing after the shaping of the expansion sleeve generally can deform again in a short time because the formation stress or external factors causing the deformation of the casing are not eliminated, and the conditions such as tool clamping or failure can be caused in the process of expanding and repairing the casing seriously.
Therefore, the existing sleeve shaping technology cannot meet the production requirement of the oil-water well, and development of a sleeve sand blasting, slotting and cavity-making tubular column and a sleeve shaping operation method for recovering the integrity of the oil-water well shaft are urgently needed to meet the production requirement.
Disclosure of Invention
The invention aims to provide a sleeve sand blasting slotting cavity-making pipe column which can effectively eliminate stratum stress outside a sleeve and provide conditions for repairing a diameter-reduced sleeve.
The invention also aims to provide a shaping operation method of the sleeve sand blasting slotting cavity-making tubular column.
For this purpose, the technical scheme of the invention is as follows:
a sleeve sand blasting slotting cavity-making pipe column comprises a hydraulic reducing ball centralizer, a reverse circulation well washing valve and a hydraulic sand blasting slotting device which are arranged from top to bottom; wherein, the liquid crystal display device comprises a liquid crystal display device,
the reverse circulation well flushing valve comprises a second limiting ring, a second reset spring and a circulation sliding sleeve which are arranged in a second outer barrel; the inner diameter of the second outer cylinder is gradually reduced from top to bottom, so that a third annular step and a fourth annular step are sequentially formed on the inner wall of the second outer cylinder from top to bottom, and a first through-flow hole is formed in the side wall of the second outer cylinder above the third annular step; the circulating sliding sleeve and the second limiting ring are arranged at intervals from bottom to top and sleeved in the second outer cylinder; the second limiting ring is fixed on the inner wall of the second outer cylinder; the circulating sliding sleeve is a cylindrical barrel provided with a second annular boss on the outer wall of the top end and a third annular boss on the inner wall of the bottom end, and the bottom end of the circulating sliding sleeve is press-fit on the fourth annular step; a second through-flow hole is formed in the side wall of the cylinder body of the circulating sliding sleeve and below the first through-flow hole, so that when the circulating sliding sleeve ascends to the second limiting ring, the second through-flow hole is communicated with the first through-flow hole; the second reset spring is sleeved on the inner side of the circulating sliding sleeve, the top end of the second reset spring is propped against the end face of the bottom end of the second limiting ring, and the bottom end of the second reset spring is pressed on the upper end face of the third annular boss;
the hydraulic sand blasting slot cutter comprises a transition pipe and a sand blasting head which are connected from top to bottom; the sand blasting head is a cylindrical body with a conical bottom end, a blind hole close to the conical bottom end is axially formed in the center of the top surface of the sand blasting head, and a plurality of injection pore canals penetrating to the conical surface of the conical bottom end are uniformly formed in the circumferential direction from the blind hole bottom; the inner aperture of each jet passage is smaller than the outer aperture, and a nozzle is arranged in the outer through hole.
Further, the centralizer adopts a hydraulic reducing ball centralizer, and comprises a first limiting ring, a thrust sliding sleeve, a reset spring and a plurality of balls, wherein the first limiting ring, the thrust sliding sleeve, the reset spring and the balls are arranged in a first outer cylinder; wherein, the liquid crystal display device comprises a liquid crystal display device,
the inner diameter of the first outer cylinder is gradually reduced from top to bottom, so that a first annular step and a second annular step are sequentially formed on the inner wall of the first outer cylinder from top to bottom, and two rows of conical through hole groups are formed on the side wall of the lower part of the first outer cylinder; each row of conical through holes consists of a plurality of conical through holes with inner diameters gradually reduced from inside to outside, which are uniformly distributed along the circumferential direction, so that the balls are respectively arranged in the conical through holes in a one-to-one correspondence manner;
the thrust sliding sleeve and the first limiting ring are sleeved on the inner side of the first outer cylinder from bottom to top; the first limiting ring is fixed on the inner wall of the first outer cylinder above the first annular step; the thrust sliding sleeve is a cylindrical barrel with a first annular boss on the inner wall of the top end, the top end of the thrust sliding sleeve is partially propped against the bottom surface of the first limiting ring, the bottom end of the thrust sliding sleeve is arranged at intervals with the second annular step, and two annular ball grooves are arranged on the outer wall of the thrust sliding sleeve at intervals; the opening positions of the two annular ball grooves are matched with the opening positions of the two rows of conical through hole groups on the side wall of the first outer cylinder, so that balls arranged in the conical through holes initially fall into the corresponding annular ball grooves;
the reset spring is sleeved on the inner side of the thrust sliding sleeve, the top end of the reset spring is propped against the lower end face of the first annular boss, and the bottom end of the reset spring is pressed on the upper end face of the second annular step.
Further, the inner wall of the top end of the first outer cylinder is provided with a connecting internal thread, so that the top end of the first outer cylinder is connected with an upper oil pipe string; the outer wall of the bottom end of the first outer cylinder is provided with a connecting external thread.
Further, two sealing gaskets are respectively arranged on the outer wall of the second annular boss of the circulating sliding sleeve and the outer wall of the cylinder body above the second through-flow hole, so that sealing is formed between the outer wall of the second annular boss of the circulating sliding sleeve and the inner wall of the second outer cylinder and between the outer wall of the cylinder body and the inner wall of the second outer cylinder.
Further, a connecting internal thread is arranged on the inner wall of the top end of the second outer cylinder, so that the top end of the second outer cylinder is fixedly connected with the bottom end of the centralizer through threads; the outer wall of the bottom end of the second outer cylinder is provided with a connecting external thread, the top end of the transition pipe is provided with a double female joint, and the bottom end of the second outer cylinder is sequentially fixed with the double female joint through a second oil pipe in a threaded connection manner.
Further, the number of the spraying pore canals arranged at the bottom end of the sand blasting head is equal to that of the spraying pore canals, and all the spraying pore canals are arranged at an angle of 45 degrees outwards from the bottom of the blind hole in an inclined manner.
Further, the top end of the sand blasting head is sleeved on the inner side of the bottom end of the transition pipe and is fixedly connected with the transition pipe in a threaded manner, and two sealing rubber rings are arranged on the outer wall of the bottom end of the sand blasting head, so that sealing is formed between the sand blasting head and the transition pipe.
A shaping operation method implemented by adopting the sleeve sand blasting slotting cavity-making tubular column comprises the following steps:
s1, assembling and lowering a sleeve sand blasting slotting cavity-making pipe column to a position, which is 1m away from the top of a sleeve deformed well section of the sleeve, of the bottom end of a hydraulic sand blasting slotting device of the cavity-making pipe column;
s2, assembling the wellhead device and connecting the wellhead device with a ground pumping system;
s3, sleeve sand blasting and slotting and sleeve outer cavity making operation, wherein the concrete steps are as follows:
the pump truck circulates normally, the pumping displacement is kept at least 300L/min, and the pumping pressure is recorded; stopping the pump, starting a stirrer in the circulating tank, adding quartz sand into the circulating tank according to the sand ratio of 7% -8%, and stirring until the quartz sand is uniformly suspended;
starting the pump, keeping the pumping discharge capacity at least 300L/min, and continuously pumping the sand mixing liquid for 10m 3 The outlet is 15m 3 The liquid storage tank is used as a circulating tank after the slotting is completed so as to wash out quartz sand pumped into the well;
then, calculating the displacement position of the sand mixing liquid according to the depth of the sleeve-changing well section, the internal volume of the oil pipe string and the pumping displacement; when the sand mixing liquid is displaced to be 1m above the hydraulic sand blasting slot cutter, the pipe column is lowered at the speed of 0.1 m/min; at the moment, the sand mixing liquid is sprayed out through a nozzle of the hydraulic sand blasting slotting machine to slotting the sleeve, and meanwhile, a well cementing ring or stratum rock debris outside the sleeve is cleaned;
repeating the steps for at least 2 times until the sealing operation is completed;
s4, lifting the sleeve pipe, and performing sand blasting, slotting and cavity making pipe columns;
s5, shaping the sleeve:
the hydraulic expansion sleeve shaping tool string is downwards put down to the sleeve changing section by the oil pipe string to perform sleeve shaping until the sleeve changing section is lifted up and downwards put down without a blockage;
s6, well-dredging verification:
the oil pipe string is used for descending the drift size gauge to the shaping well section, the pressure is not more than 30KN, and if the drift size gauge can pass through, the drift size requirement is met;
s7, reinforcing a sleeve:
using the oil pipe string to down-hole to lower the pipe string formed by the sleeve hanger, the steel sleeve, the float collar and the float shoe to 20m below the bottom boundary of the shaping well section;
wherein the length of the steel sleeve is more than or equal to +40m of the length of the shaping well section; hanging a sleeve hanger by a seat and pressurizing by 100KN, and if no displacement exists, the sleeve hanger is qualified;
then, injecting ash for secondary fixation, waiting for solidification for more than 48 hours;
s8, drilling and completing the well.
Preferably, the step S2 specifically includes: installing a self-sealer at the wellhead to seal the annulus of the tubing string in the casing; a water tap and a high-pressure water tap are arranged at the top of the first oil pipe string and are brought to a pump truck; pump truck water inlet 10m 3 A circulation tank and equipped with 15m 3 The ground tank is filled with 8m 3 The well-flushing liquid is reserved; and starting the pump, and recording the pump pressure and the displacement after the test circulation is normal.
Compared with the prior art, when the sleeve sand blasting slotting cavity-making pipe column is used for reducing and shaping the oil field well repairing sleeve, the hydraulic sand blasting slotting device can be used for longitudinally slotting the deformed section sleeve, meanwhile, stratum rock fragments outside the sleeve are cleaned, external stress borne by the sleeve is removed, preconditions are provided for sleeve shaping, shaping success rate is effectively improved, secondary reducing of the sleeve in a short period is avoided, and the sleeve sand blasting slotting cavity-making pipe column is matched with a reducing ball centralizer and a reverse circulation well washing valve, so that the sleeve sand blasting cavity-making pipe column is suitable for sleeve well section operation requirements of different inner diameters, and can solve the problem of pipe column blockage possibly occurring; in addition, the sleeve sand blasting slotting cavity-making pipe column is matched with a hydraulic sleeve expanding tool and the like to effectively recover the diameter of the sleeve, and the oil-water well production channel is recovered in a small sleeve reinforcing mode, so that the secondary diameter reduction damage of the sleeve can be avoided, the production recovery requirement of the diameter reduction oil-water well is met, and the sleeve sand blasting cavity-making pipe column has a good popularization prospect in oil field well repairing operation and production.
Drawings
FIG. 1 is a schematic view of the upper half of a box blasting slit cavity string of the present invention;
FIG. 2 is a schematic view of the lower half of the sleeve blasting slit cavity string of the present invention;
FIG. 3 is a schematic view of the hydraulic variable diameter ball centralizer (first return spring in compression) of the box blasting slot-making chamber string of the present invention;
FIG. 4 is a schematic view of the reverse circulation well flushing valve (second return spring in free state) of the sleeve blasting slit cavity string of the present invention;
fig. 5 is a schematic structural view of a hydraulic sand blasting slot cutter of the sleeve sand blasting slot cavity tubular column of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and specific examples, which are in no way limiting.
Example 1
As shown in fig. 1 and 2, the sleeve sand blasting slotting cavity-making pipe column comprises a first oil pipe string 1, a hydraulic reducing ball centralizer 2, a reverse circulation well flushing valve 3, a second oil pipe 4 and a hydraulic sand blasting slotting device 5 which are sequentially connected in a threaded mode from top to bottom. Wherein, the liquid crystal display device comprises a liquid crystal display device,
the first oil pipe string 1 is used for lowering the whole pipe string until the hydraulic sand blasting slotting device 5 is positioned above the sleeve change position, and the length of the first oil pipe string is related to the depth of the underground sleeve change position, so that the whole pipe string can be lowered until the hydraulic sand blasting slotting device 5 is positioned at the 1m position at the top of the sleeve deformation well section;
as shown in fig. 3, the hydraulic reducing ball centralizer 2 includes a first outer cylinder 2a, a first stopper ring 2b, a thrust sliding sleeve 2c, a return spring 2d, and eight balls 2f; in particular, the method comprises the steps of,
the first outer cylinder 2a is of a cylindrical cylinder structure, and the inner diameter of the first outer cylinder is gradually reduced from top to bottom, so that a first annular step and a second annular step are sequentially formed on the inner wall of the first outer cylinder from top to bottom; two rows of conical through hole groups are formed in the side wall of the lower part of the first outer cylinder 2a, each row of conical through hole groups consists of four conical through holes 2e with inner diameters gradually reduced from inside to outside, wherein the four conical through holes are uniformly distributed along the circumferential direction, and eight balls 2f are respectively arranged in the eight conical through holes 2e in a one-to-one correspondence manner; a connecting internal thread is arranged on the top end inner wall of the first outer cylinder 2a, and a connecting external thread is arranged on the bottom end outer wall;
the first limiting ring 2b is a cylindrical barrel body, is sleeved on the inner side of the first outer barrel 2a, is arranged above the upper end surface of the first annular step, and is fixed on the inner wall of the first outer barrel 2a in a threaded connection mode;
the thrust sliding sleeve 2c is a cylindrical barrel with a first annular boss on the inner wall of the top end, and two annular ball grooves 2e are arranged on the outer wall of the cylindrical barrel at intervals; the thrust sliding sleeve 2c is sleeved on the inner side of the first outer cylinder 2a and is arranged above the second annular step, the top end of the thrust sliding sleeve partially abuts against the bottom surface of the first limiting ring 2b, and a certain interval is reserved between the bottom end of the thrust sliding sleeve and the upper end surface of the second annular step; the two annular ball grooves 2e are arranged at annular ball grooves 2e which are matched with the two rows of conical through hole groups on the side wall of the first outer cylinder 2a in position, so that the two annular ball grooves 2e are respectively opposite to the two rows of conical through hole groups in the initial state, and eight balls 2f respectively fall into the two annular ball grooves 2e;
the reset spring 2d is sleeved on the inner side of the thrust sliding sleeve 2c, the top end of the reset spring is propped against the lower end face of the first annular boss, and the bottom end of the reset spring is pressed on the upper end face of the second annular step; when the thrust sliding sleeve 2c descends to the second annular step under the action of hydraulic pressure, the return spring 2d is in a compressed state, and meanwhile, as the two annular ball grooves 2e on the thrust sliding sleeve 2c descend relative to the two rows of conical through hole groups, eight balls 2f protrude outwards from the conical through holes, so that the outer diameter of the first cylinder 2a is increased, and the centralizing function is realized; when the hydraulic pressure is released, the compressed return spring 2d is restored and pushes the thrust sliding sleeve 2c to move up to the initial state, the eight balls 2f fall into the two annular ball grooves 2e again, and the first cylinder 2a restores the original outer diameter.
The diameter-changing function of the hydraulic diameter-changing ball centralizer 2 can meet the operation requirements of different sets of well condition-changing, and has the effect of preventing clamping.
As shown in fig. 4, the reverse circulation well washing valve 3 includes a second outer cylinder 3a, a second stop collar 3b, a second return spring 3c, and a circulation sliding sleeve 3d; in particular, the method comprises the steps of,
the second outer cylinder 3a is of a cylindrical cylinder structure, the inner diameter of which is gradually reduced from top to bottom, so that a third annular step and a fourth annular step are sequentially formed on the inner wall of the second outer cylinder from top to bottom; a first through-flow hole 3f is formed in the side wall of the second outer cylinder 3a above the third annular step; a connecting internal thread is arranged on the top end inner wall of the second outer cylinder 3a, and a connecting external thread is arranged on the bottom end outer wall;
the circulating sliding sleeve 3d and the second limiting ring 3b are sleeved on the inner side of the second outer cylinder 3a from bottom to top at intervals; wherein the second limiting ring 3b is a cylindrical barrel body which is in threaded connection with the inner wall of the second outer barrel 3 a; the circulating sliding sleeve 3d is a cylindrical barrel provided with a second annular boss on the outer wall of the top end and a third annular boss on the inner wall of the bottom end, and a second through-flow hole 3g is arranged on the side wall of the middle part; the bottom end of the circulating sliding sleeve 3d is press-fit on the third annular step, the second through-flow hole 3g is positioned below the first through-flow hole 3f, and the spacing distance between the second through-flow hole 3g and the first through-flow hole 3f is satisfied that when the circulating sliding sleeve 3d moves upwards to be abutted against the bottom end face of the second limiting ring 3b, the second through-flow hole 3g is communicated with the first through-flow hole 3f;
as a preferred technical scheme of the embodiment, in order to ensure the tightness between the circulating sliding sleeve 3d and the second limiting ring 3b, two sealing gaskets 3e are respectively arranged on the outer wall of the second annular boss of the circulating sliding sleeve 3d and the outer wall of the cylinder body above the second through-flow hole 3g, so that the second annular boss outer wall of the circulating sliding sleeve 3d and the inner wall of the second outer cylinder 3a and the outer wall of the cylinder body and the inner wall of the second outer cylinder 3a are sealed;
the second reset spring 3c is sleeved on the inner side of the circulating sliding sleeve 3d, the top end of the second reset spring is propped against the end face of the bottom end of the second limiting ring 3b, and the bottom end of the second reset spring is pressed on the upper end face of the third annular boss;
during the reverse circulation well flushing valve 3 circulation cutting seam making period, when the pipe column is blocked in the sand blasting process, high-pressure liquid is pumped into the oil sleeve annulus, the high-pressure liquid enters the first through-flow hole 3f and acts on the lower end face of the second annular boss of the circulation sliding sleeve 3d, the circulation sliding sleeve 3d is pushed to ascend until the top end of the circulation sliding sleeve is propped against the bottom end face of the second limiting ring 3b, at the moment, the second through-flow hole 3g is communicated with the first through-flow hole 3f, the high-pressure liquid enters the second outer cylinder 3a, the reverse circulation well flushing function is achieved, and blocked quartz sand in the pipe is washed out.
The second oil pipe 4 is used for conveniently connecting the reverse circulation well washing valve 3 and the hydraulic sand blasting slot cutter 5.
As shown in fig. 5, the hydraulic sand blasting slot cutter 5 comprises a double female joint 5a, a transition pipe 5b and a sand blasting head 5d which are sequentially connected from top to bottom; in particular, the method comprises the steps of,
the top end of the double female joint 5a is sleeved outside the bottom end of the second oil pipe 4 and is fixedly connected with the second oil pipe 4 in a threaded manner, and the bottom end of the double female joint is sleeved outside the top end of the transition pipe 5b and is fixedly connected with the transition pipe 5b in a threaded manner;
the sand blasting head 5d is a cylinder with a conical bottom end, blind holes close to the conical bottom end are axially formed in the center of the top surface of the sand blasting head, and four injection through holes are uniformly formed in the circumferential direction from the blind hole bottoms; each injection through hole is formed in an inclined angle of 45 degrees from the bottom of the blind hole towards the conical surface of the conical bottom end, the inner side aperture is smaller than the outer side aperture, and a nozzle 5e is arranged on the outer side hole wall in a threaded connection mode; the hydraulic sand blasting slotting machine 5 performs the throttling function of the nozzle 5e, and can realize slotting of the sleeve by matching with the circulating working fluid (sand ratio is 7% -8%), and simultaneously performs the spraying cleaning on stratum rock scraps outside the sleeve, so that the external stress of the deformed sleeve is eliminated;
the top end of the sand blasting head 5d is sleeved on the inner side of the bottom end of the transition pipe 5b and is fixedly connected with the transition pipe 5b in a threaded manner; meanwhile, in order to ensure the connection tightness between the sand blasting head 5d and the transition pipe 5b, two sealing rubber rings 5c are arranged on the outer wall of the bottom end of the sand blasting head 5d, so that the sand blasting head 5d and the transition pipe 5b form a seal.
Example 2
A sleeve shaping operation method realized by adopting the sleeve sand blasting slotting cavity tubular column of the embodiment 1 comprises the following specific implementation steps:
s1, assembling and lowering a sleeve pipe, and performing sand blasting, slotting and cavity making pipe column:
the first oil pipe string 1, the hydraulic reducing ball centralizer 2, the reverse circulation well flushing valve 3, the second oil pipe 4 and the hydraulic sand blasting slotting machine 5 are sequentially connected in a threaded manner from top to bottom to form a sleeve sand blasting slotting cavity-making pipe column; then, a sleeve sand blasting slotting cavity making pipe column is put down to a position, which is 1m away from the top of the sleeve deformation well section of the sleeve 6, of the bottom end of the hydraulic sand blasting slotting device 5;
s2, assembling the wellhead device and connecting the wellhead device with a ground pumping system:
installing a self-sealer at the wellhead to seal the annulus of the tubing string 1 to the casing 6; a water tap and a high-pressure water tap are arranged at the top of the first oil pipe string 1 and are brought to a pump truck; pump truck water inlet 10m 3 Circulation tank (with stirrer and sand hopper) 15m 3 Ground tank (with 8 m) 3 Flushing fluid) for standby; starting a pump, and recording the pump pressure and the displacement after the test circulation is normal;
s3, sleeve sand blasting slotting and sleeve outer cavity making operation:
the pump truck circulates normally, the pumping displacement is kept at least 300L/min, and the pumping pressure is recorded;
stopping the pump, starting a stirrer in the circulating tank, adding quartz sand into the circulating tank according to the sand ratio of 7% -8%, and stirring until the quartz sand is uniformly suspended;
starting the pump, keeping the pumping discharge capacity at least 300L/min, and continuously pumping the sand mixing liquid for 10m 3 The outlet is 15m 3 The liquid storage tank is used as a circulating tank after the slotting is completed so as to wash out quartz sand pumped into the well;
calculating a displacement position of the sand mixing liquid according to the depth of the sleeve-changing well section, the internal volume of the oil pipe string 1 and the pumping displacement; when the sand mixing liquid is displaced to be 1m above the hydraulic sand blasting slot cutter, the pipe column is lowered at the speed of 0.1 m/s; at this time, the sand mixture is sprayed out through the nozzle 5e of the hydraulic sand blasting slot cutter 5; under the action of throttling and spraying, the sleeve is slit by matching with circulating working fluid (sand ratio is 7% -8%), and meanwhile, stratum cuttings outside the sleeve are sprayed and cleaned, so that the external stress of the deformed sleeve is eliminated; repeating the steps for more than 2 times until the operation is completed;
s4, lifting the sleeve pipe, and performing sand blasting, slotting and cavity making pipe columns;
s5, shaping the sleeve:
the hydraulic expansion sleeve shaping tool string is downwards placed underground by utilizing the oil pipe string, and is formed by sequentially connecting a ball expander, a hydraulic pressurizing device, an oil pipe anchor and an oil pipe which are generated by downwards through oil pipe threads until sleeve changing sections (namely sand blasting cutting sections formed in the step S3) are used for sleeve shaping until the sleeve is lifted upwards and downwards to be free from hanging;
s6, well-dredging verification:
the oil pipe string is utilized to downwards put the drift size gauge to a shaping well section (namely, the sand blasting cutting section formed in the step S3), the pressure is not more than 30KN, and if the drift size gauge can pass through, the drift size requirement is met;
s7, reinforcing the sleeve (or directly reinforcing by cement):
using the oil pipe string to down-hole to lower the pipe string formed by the sleeve hanger, the steel sleeve, the float collar and the float shoe to 20m below the bottom boundary of the shaping well section (namely the sand blasting cutting section formed in the step S3); wherein the length of the steel sleeve is more than or equal to +40m of the length of the shaping well section;
hanging a sleeve hanger by a seat and pressurizing by 100KN, and if no displacement exists, the sleeve hanger is qualified; then injecting ash for secondary fixation, waiting for solidification for more than 48 hours;
s8, drilling and completing:
and (3) utilizing the oil pipe string to downwards put a pipe string consisting of a screw drill and a mill shoe into the well, drilling through a well cementation ash plug, a floating hoop and a mill shoe to the bottom of the well, and thoroughly flushing the well. And (5) pulling out the drilling plug pipe column and completing the well.
The sleeve shaping operation including the steps of sleeve slotting, sleeve external cavity making, sleeve shaping, sleeve reinforcing and the like is completed through the steps S1 to S8.
Claims (9)
1. The sleeve sand blasting slotting cavity-making pipe column is characterized by comprising a hydraulic reducing ball centralizer (2), a reverse circulation well flushing valve (3) and a hydraulic sand blasting slotting device (5) which are arranged from top to bottom in sequence; wherein, the liquid crystal display device comprises a liquid crystal display device,
the reverse circulation well flushing valve (3) comprises a second limiting ring (3 b), a second reset spring (3 c) and a circulation sliding sleeve (3 d) which are arranged in a second outer barrel (3 a); the inner diameter of the second outer cylinder (3 a) is gradually reduced from top to bottom, so that a third annular step and a fourth annular step are sequentially formed on the inner wall of the second outer cylinder from top to bottom, and a first through-flow hole (3 f) is formed in the side wall of the second outer cylinder (3 a) above the third annular step; the circulating sliding sleeve (3 d) and the second limiting ring (3 b) are arranged at intervals from bottom to top and sleeved in the second outer cylinder (3 a); the second limiting ring (3 b) is fixed on the inner wall of the second outer cylinder (3 a); the circulating sliding sleeve (3 d) is a cylindrical barrel provided with a second annular boss on the outer wall of the top end and a third annular boss on the inner wall of the bottom end, and the bottom end of the circulating sliding sleeve is press-fit on the fourth annular step; a second through-flow hole (3 g) is formed in the side wall of the cylinder body of the circulating sliding sleeve (3 d) and positioned below the first through-flow hole (3 f), so that when the circulating sliding sleeve (3 d) ascends to the second limiting ring (3 b), the second through-flow hole (3 g) is communicated with the first through-flow hole (3 f); the second reset spring (3 c) is sleeved on the inner side of the circulating sliding sleeve (3 d), the top end of the second reset spring is propped against the end face of the bottom end of the second limiting ring (3 b), and the bottom end of the second reset spring is pressed on the upper end face of the third annular boss;
the hydraulic sand blasting slotting machine (5) comprises a transition pipe (5 b) and a sand blasting head (5 d) which are connected from top to bottom; the sand blasting head (5 d) is a cylindrical body with a conical bottom end, a blind hole close to the conical bottom end is axially formed in the center of the top surface of the sand blasting head, and a plurality of injection pore canals penetrating to the conical surface of the conical bottom end are uniformly formed in the circumferential direction from the blind hole bottom; the inner aperture of each jet passage is smaller than the outer aperture, and a nozzle (5 e) is arranged in the outer through hole.
2. The casing sand blasting slit cavity tubular column according to claim 1, wherein the centralizer (2) adopts a hydraulic reducing ball centralizer, and comprises a first limiting ring (2 b), a thrust sliding sleeve (2 c), a return spring (2 d) and a plurality of balls (2 f) which are arranged in a first outer cylinder (2 a); wherein, the liquid crystal display device comprises a liquid crystal display device,
the inner diameter of the first outer cylinder (2 a) is gradually reduced from top to bottom, so that a first annular step and a second annular step are sequentially formed on the inner wall of the first outer cylinder from top to bottom, and two rows of conical through hole groups are formed on the side wall of the lower part of the first outer cylinder (2 a); each row of conical through hole groups consists of a plurality of conical through holes (2 e) with inner diameters gradually reduced from inside to outside, which are uniformly distributed along the circumferential direction, so that the balls (2 f) are respectively arranged in the conical through holes (2 e) in a one-to-one correspondence manner;
the thrust sliding sleeve (2 c) and the first limiting ring (2 b) are sleeved on the inner side of the first outer cylinder (2 a) from bottom to top; the first limiting ring (2 b) is fixed on the inner wall of the first outer cylinder (2 a) above the first annular step; the thrust sliding sleeve (2 c) is a cylindrical barrel with a first annular boss on the inner wall of the top end, the top end of the thrust sliding sleeve is partially propped against the bottom surface of the first limiting ring (2 b), the bottom end of the thrust sliding sleeve is arranged at intervals with the second annular step, and two annular ball grooves (2 e) are arranged on the outer wall of the thrust sliding sleeve (2 c) at intervals; the opening positions of the two annular ball grooves (2 e) are matched with the opening positions of two rows of conical through hole groups on the side wall of the first outer cylinder (2 a), so that balls (2 f) arranged in the conical through holes initially fall into the corresponding annular ball grooves (2 e);
the reset spring (2 d) is sleeved on the inner side of the thrust sliding sleeve (2 c), the top end of the reset spring is propped against the lower end face of the first annular boss, and the bottom end of the reset spring is pressed on the upper end face of the second annular step.
3. The sleeve sand blasting slit cavity pipe column according to claim 2, wherein the inner wall of the top end of the first outer cylinder (2 a) is provided with connecting internal threads, so that the top end of the first outer cylinder is connected with an upper oil pipe string; the outer wall of the bottom end of the first outer cylinder (2 a) is provided with connecting external threads.
4. The casing blasting slit cavity string according to claim 1, wherein two sealing gaskets (3 e) are respectively arranged on the outer wall of the second annular boss of the circulation sliding sleeve (3 d) and the outer wall of the cylinder above the second through-flow hole (3 g), so that sealing is formed between the outer wall of the second annular boss of the circulation sliding sleeve (3 d) and the inner wall of the second outer cylinder (3 a) and between the outer wall of the cylinder and the inner wall of the second outer cylinder (3 a).
5. A casing sand blasting slit cavity pipe column according to claim 3, characterized in that the inner wall of the top end of the second outer cylinder (3 a) is provided with connecting internal threads, so that the top end of the second outer cylinder is fixedly connected with the bottom end of the centralizer (2) through threads; the outer wall of the bottom end of the second outer cylinder (3 a) is provided with connecting external threads, the top end of the transition pipe (5 b) is provided with a double female joint (5 a), and the bottom end of the second outer cylinder (3 a) is sequentially connected and fixed with the double female joint (5 a) through a second oil pipe (4) in a threaded manner.
6. The sleeve sand blasting slit cavity pipe column according to claim 1, wherein the number of the injection pore canals formed at the bottom end of the sand blasting head (5 d) is 4, and each injection pore canal is formed at an angle of 45 degrees outwards from the bottom of the blind hole in an inclined manner.
7. The sleeve sand blasting slit cavity pipe column according to claim 1, wherein the top end of the sand blasting head (5 d) is sleeved on the inner side of the bottom end of the transition pipe (5 b) and is fixedly connected with the transition pipe (5 b) in a threaded manner, and two sealing rubber rings (5 c) are arranged on the outer wall of the bottom end of the sand blasting head (5 d) so that sealing is formed between the sand blasting head (5 d) and the transition pipe (5 b).
8. A method of shaping a pipe string by sandblasting a sleeve to form a slot, according to claim 2, comprising the steps of:
s1, assembling and lowering a sleeve sand blasting slotting cavity-making pipe column to a position, which is 1m away from the top of a sleeve deformation well section of a sleeve (6), of the bottom end of a hydraulic sand blasting slotting device (5);
s2, assembling the wellhead device and connecting the wellhead device with a ground pumping system;
s3, sleeve sand blasting and slotting and sleeve outer cavity making operation, wherein the concrete steps are as follows: the pump truck circulates normally, the pumping displacement is kept at least 300L/min, and the pumping pressure is recorded; stopping the pump, starting a stirrer in the circulating tank, adding quartz sand into the circulating tank according to the sand ratio of 7% -8%, and stirring until the quartz sand is uniformly suspended; starting the pump, keeping the pumping discharge capacity at least 300L/min, and continuously pumping the sand mixing liquid for 10m 3 The outlet is 15m 3 The liquid storage tank is used as a circulating tank after the slotting is completed so as to wash out quartz sand pumped into the well; then, calculating the displacement position of the sand mixing liquid according to the depth of the sleeve-changing well section, the internal volume of the oil pipe string and the pumping displacement; when the sand mixing liquid is displaced to be 1m above the hydraulic sand blasting slot cutter, the pipe column is lowered at the speed of 0.1 m/min; at the moment, the sand mixing liquid is sprayed out through a nozzle of the hydraulic sand blasting slotting machine to slotting the sleeve, and meanwhile, a well cementing ring or stratum rock debris outside the sleeve is cleaned; repeating the steps for at least 2 times until the slotting operation is completed;
s4, lifting the sleeve pipe, and performing sand blasting, slotting and cavity making pipe columns;
s5, shaping the sleeve: the hydraulic expansion sleeve shaping tool string is downwards put down to the sleeve changing section by the oil pipe string to perform sleeve shaping until the sleeve changing section is lifted up and downwards put down without a blockage;
s6, well-dredging verification: the oil pipe string is used for descending the drift size gauge to the shaping well section, the pressure is not more than 30KN, and if the drift size gauge can pass through, the drift size requirement is met;
s7, reinforcing a sleeve: using the oil pipe string to down-hole to lower the pipe string formed by the sleeve hanger, the steel sleeve, the float collar and the float shoe to 20m below the bottom boundary of the shaping well section; the length of the steel sleeve is more than or equal to +40m of the length of the shaping well section; hanging a sleeve hanger by a seat and pressurizing by 100KN, and if no displacement exists, the sleeve hanger is qualified; then injecting ash for secondary fixation, waiting for solidification for more than 48 hours;
s8, drilling and completing the well.
9. The shaping method according to claim 8, wherein step S2 is specifically: installing a self-sealer at the wellhead to seal the annulus of the oil pipe string in the casing (6); a water tap and a high-pressure water tap are arranged at the top of the first oil pipe string and are brought to a pump truck; pump truck water inlet 10m 3 A circulation tank and equipped with 15m 3 The ground tank is filled with 8m 3 The well-flushing liquid is reserved; and starting the pump, and recording the pump pressure and the displacement after the test circulation is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111293767.4A CN116066000A (en) | 2021-11-03 | 2021-11-03 | Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111293767.4A CN116066000A (en) | 2021-11-03 | 2021-11-03 | Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116066000A true CN116066000A (en) | 2023-05-05 |
Family
ID=86172068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111293767.4A Pending CN116066000A (en) | 2021-11-03 | 2021-11-03 | Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116066000A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624117A (en) * | 2023-07-19 | 2023-08-22 | 西南石油大学 | Self-control radial circulation type oil-gas well casing shaping tool and method |
-
2021
- 2021-11-03 CN CN202111293767.4A patent/CN116066000A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624117A (en) * | 2023-07-19 | 2023-08-22 | 西南石油大学 | Self-control radial circulation type oil-gas well casing shaping tool and method |
| CN116624117B (en) * | 2023-07-19 | 2023-09-26 | 西南石油大学 | Self-control radial circulation type oil-gas well casing shaping tool and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2453063C (en) | Liner hanger | |
| CN113803020B (en) | Rapid leaking stoppage and production recovery method for horizontal well | |
| CN104213861A (en) | Expansion tube expansion technological method and tool system | |
| CN100538003C (en) | The expansion sieve tube hanging method | |
| CN109667565B (en) | Bare hole anchoring device and process method | |
| CN116066000A (en) | Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof | |
| CN111042767B (en) | Horizontal well segmented acidizing filling sand prevention integrated tubular column and method | |
| CN111425148A (en) | Casing pipe column applying toe end sliding sleeve to full-bore sliding sleeve and using method of casing pipe column | |
| RU2312972C2 (en) | Method and device for fluid-containing reservoir isolation | |
| RU2405914C1 (en) | Method and device for well flushing | |
| RU2638672C1 (en) | Method for drilling out downhole equipment with use of flexible pipe | |
| CN115434665B (en) | Shaft switching tool free of well killing and underground operation and process method | |
| CN116816308A (en) | Oil-free pipe paraffin removal lifting device for small-bore shale oil well | |
| US20230235655A1 (en) | Wellbore staged operation method and rubber plug for said method | |
| CN114562199A (en) | Cement plugging and drilling integrated downhole device | |
| CN115538975A (en) | Leaking stoppage oil extraction device and leaking stoppage oil extraction method for multi-point water outlet oil well | |
| CN211422596U (en) | Hydraulic pushing small-diameter rubber cylinder pipe scraper | |
| CN113738314B (en) | Integrated pump-suction combined operation pressurized rotary pump pipe column and plugging tool and method | |
| RU2705671C1 (en) | Method for installation of shaped shutter in well and device for its implementation | |
| RU2719881C1 (en) | Method for installation of shaped shutter in well and device for its implementation | |
| CN210105823U (en) | Large-drift-diameter ball seat for cleaning and well completion | |
| CN114810021A (en) | Gas well full life cycle coiled tubing completion pipe string and process method thereof | |
| CN205840841U (en) | A kind of single-direction balls valve type cement stripper tube piecing devices | |
| CN219452071U (en) | Fracturing plugging tool capable of adjusting speed and fully dissolving | |
| CN212774200U (en) | Filling device for underground casing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |