CN-116498229-B - Device and method for rotary jetting and oscillating blocking removal of continuous oil pipe of horizontal well

CN116498229BCN 116498229 BCN116498229 BCN 116498229BCN-116498229-B

Abstract

The invention discloses a rotary jetting vibration blocking removing device and method for a continuous oil pipe of a horizontal well, wherein the device comprises a high-pressure spray head, a rotating pipe, a centrifugal force reducing blocking mechanism and a centrifugal force reducing centering mechanism, the high-pressure spray head is provided with a high-pressure water spray hole and is a hydraulic rotary spray head, the high-pressure water spray hole of the high-pressure spray head generates rotating force when high-pressure water passes through the high-pressure water spray hole, the front port of the high-pressure spray head is connected and communicated with the tail end of the rotating pipe, the rear port of the high-pressure spray head is connected and communicated with a central channel of a rotary disc of the centrifugal force reducing blocking mechanism, and the high-pressure spray head rotates to drive the rotating pipe and the rotary disc to rotate simultaneously. The invention can ensure that the blockage cleaned by the high-pressure spray head has a blocking effect, prevents the blockage from entering the other side of the first limiting chute to cause secondary blockage, ensures the unblocking effect, and can ensure that the rotation axis of the rotating disc, namely the position of the high-pressure spray head, is positioned on the central axis of the horizontal well, thereby having a good centralizing effect on the high-pressure spray head.

Inventors

WANG JIAN
LAN JIAN
WANG SIMENG
LI FENGTIAN
LIU XIAOHONG
JIANG JIANG
GUO QIANG
XUE YUAN
LI JINGCHAO
DENG ZHENRUI
LI SHANSHAN
KONG LINGLE
LIU HONGFEN
LI XIN
YIN XINRAN
TAO HUA
SUN QIANYU
PAN SONG
WANG YUFANG
WANG JIANFENG

Assignees

中国石油化工股份有限公司
胜利油田鲁胜石油开发有限责任公司

Dates

Publication Date: 20260508
Application Date: 20220118

Claims (8)

1. The rotary jetting vibration blocking remover for the continuous oil pipe of the horizontal well comprises a high-pressure spray head, wherein the high-pressure spray head is provided with a high-pressure water spray hole and is a hydraulic rotary spray head; The centrifugal force reducing blocking mechanism is characterized by further comprising a rotating pipe and a centrifugal force reducing blocking mechanism; The front port of the high-pressure spray head is connected and communicated with the tail end of the rotary pipe, and the rear port of the high-pressure spray head is connected and communicated with the central channel of the rotary disk of the centrifugal force reducing blocking mechanism; The centrifugal force reducing centering mechanism comprises a fixed ring mechanism and a centering device mechanism, wherein the front end of the fixed ring mechanism is in contact connection with the rear end of the centering device mechanism; The centrifugal force reducing blocking mechanism comprises at least three groups of centrifugal reducing module units, and the multiple groups of centrifugal reducing module units are arranged and fixed on the periphery of a central channel of a rotating disk of the centrifugal force reducing blocking mechanism in an annular matrix; The centrifugal reducing module unit comprises a first limiting chute, a first extension spring, a first sliding block, a first adjusting block and a second adjusting block; the first sliding block slides in the first limiting sliding groove, the first extension spring is arranged in the first limiting sliding groove, the inner end of the first extension spring is connected with the bottom of the first limiting sliding groove, and the outer end of the first extension spring is connected with the first sliding block; the centrifugal reducing module units which are adjacent to each other in pairs are respectively hinged together through adjacent first adjusting blocks and second adjusting blocks; the fixed ring mechanism comprises a first fixed ring and at least three groups of centrifugal pushing module units, wherein the groups of centrifugal pushing module units are arranged and fixed on the first fixed ring in an annular matrix, and the first fixed ring is sleeved on the rotating pipe; The centrifugal pushing module unit comprises a second limiting chute, a second sliding block, a second extension spring, a third limiting chute and a third sliding block; The second sliding block slides in the second limiting sliding groove, the second stretching spring is arranged in the second limiting sliding groove, the inner end of the second stretching spring is connected with the bottom of the second limiting sliding groove, and the outer end of the second stretching spring is connected with the second sliding block; The first fixing ring is also provided with a third axial limiting chute, and corresponds to the second limiting chute, and the third sliding block slides in the third limiting chute; The outer end of the second sliding block and the inner end of the third sliding block are simultaneously provided with matched inclined planes, the second sliding block pushes the third sliding block outwards through centrifugal force, and the third sliding block axially moves to push the centralizer mechanism to axially compress.
2. The horizontal well coiled tubing rotary jetting vibration unblocking device according to claim 1, further comprising a water supply pipe; and the tail end opening of the water supply pipe is fixedly sleeved with the front end opening of the rotary pipe through a waterproof sealing bearing.
3. The rotary jetting vibration blocking remover for the continuous oil pipe of the horizontal well according to claim 2, wherein at least three groups of high-pressure water spraying holes are formed in the surface side wall and the front shaft end surface oblique angles of the high-pressure spray head, the opening direction of the high-pressure water spraying holes is not perpendicular to the tangential plane of the high-pressure spray head, which is contacted with the high-pressure water spraying holes, and the axial center of each group of high-pressure water spraying holes is the same as the tangential plane direction oblique angle of the high-pressure spray head.
4. The horizontal well coiled tubing rotary jetting vibration blocking remover according to claim 3, wherein the outer end surfaces of the first slider, the first adjusting block and the second adjusting block are cambered surfaces.
5. The horizontal well coiled tubing rotary jetting vibration blocking remover according to claim 4, wherein the third sliding block is provided with a limiting block which is prevented from falling out of the third limiting sliding groove.
6. The horizontal well coiled tubing rotary jetting vibration de-plugging device of claim 5, wherein the centralizer mechanism comprises a centralizer fixed ring, a centralizer movable ring and a spiral strip group; The centralizer fixing ring is fixedly sleeved on the surface side wall of the water supply pipe, and the centralizer movable ring is movably sleeved on the surface side wall of the water supply pipe and is in contact with the limiting block; a spiral strip group is fixedly arranged between the centralizer fixing ring and the centralizer movable ring.
7. The horizontal well coiled tubing rotary jetting vibration unblocking device of claim 6, wherein the maximum radius of the centralizer mechanism is equal to the radius of the rotating disc when the centralizer mechanism is stationary.
8. A method of using the horizontal well coiled tubing rotary jetting vibration de-plugging device of claim 7, comprising the steps of: The water flow passes through the inner cavity of the water supply pipe to the high-pressure spray head and is sprayed out through the high-pressure spray hole, meanwhile, as the high-pressure spray hole is formed in an inclined direction, the high-pressure water flow is sprayed out by the high-pressure spray hole, the high-pressure water flow directly impacts the blockage of the oil well stratum, the stratum is subjected to the action of shearing force besides the large pulsation impact pressure, and is loosened instantly under the combined action of the pulsation impact pressure and the shearing force, so that a good blockage removing effect is achieved, the reaction force of the water flow drives the high-pressure spray head to rotate, the high-pressure spray head rotates and sprays, and the cleaning and blockage removing effects are achieved on the inner side wall of the horizontal well and the upper blast hole and the lower blast hole; Meanwhile, the high-pressure spray head rotates to drive the rotary pipe and the rotary disk to rotate, the rotary disk rotates to drive the first slide block to rotate, the first slide block moves towards the direction away from the rotary disk under the action of centrifugal force, the first tension spring stretches, meanwhile, the first slide block drives the first regulating block and the second regulating block to move together towards the direction away from the first limiting chute, the first slide block, the first regulating block and the second regulating block form a circle of circular ring with the diameter larger than that of the first limiting chute through the fixed shaft and are attached to the inner side wall of the horizontal well, so that a blocking object cleaned through the high-pressure spray head has a blocking effect, the blocking object is prevented from entering the other side of the first limiting chute to cause secondary blocking, the blocking knowing effect is guaranteed, meanwhile, the rotating axis of the rotary disk, namely the position of the high-pressure spray head, is guaranteed to be located on the central axis of the horizontal well, and a good righting effect is achieved on the high-pressure spray head; Meanwhile, the rotating pipe rotates to drive the first fixed ring to rotate, the second sliding block moves towards the direction away from the fixed ring along the inner side wall of the second limiting sliding groove under the action of centrifugal force, the second sliding block is in contact with the third sliding block, the third sliding block is driven to move towards the direction away from the fixed ring along the third limiting sliding groove through the inclined plane design of the second sliding block and the third sliding block, the movable ring of the centralizer is pushed, the spiral strip group is compressed through the movement of the movable ring of the centralizer and the fixed ring of the centralizer, the diameter of the middle part of the spiral strip group is enlarged and is attached to the inner side wall of the horizontal well, the spiral strip group is used for fixing and fixing the water supply pipe, the water supply pipe from vibrating and bending from the fixed ring of the centralizer to the high-pressure nozzle is prevented, the water supply pipe is guaranteed to have good water supply effect on the high-pressure nozzle, and the working stability of the whole device is guaranteed; after the work is finished, the whole device is taken out through dragging the water supply pipe, the rotating disk is contacted with the inner side wall of the horizontal well when moving along the horizontal well, the loose plug on the inner side wall of the horizontal well is scraped, meanwhile, the removed plug is driven to be removed to the outside through the movement of the water supply pipe and the rotating disk, and the blockage is prevented from being caused again in the horizontal well.

Description

Device and method for rotary jetting and oscillating blocking removal of continuous oil pipe of horizontal well Technical Field The invention relates to the technical field of oil well blocking removal, in particular to a device and a method for blocking removal by rotary jetting and vibration of a continuous oil pipe of a horizontal well. Background In recent years, along with the progress of drilling technology, various wells with complex structures are generated when needed, and the requirement on the improvement of a blocking removal technology is also improved, the conventional blocking removal technology cannot meet the requirement, such as the problems of slurry pollution blocking of a horizontal well, organic-inorganic composite blocking of a sand filtering pipe and the like, the permeability of a near-wellbore zone cannot be recovered by adopting a conventional object understanding blocking method, the productivity of an oil well is liberated, and a batch of well productivity is caused to be unqualified or even scrapped in a low yield, so that serious resource waste and economic loss are caused. The traditional injection blocking removal tool matched with blocking removal is mainly used for carrying out high-pressure liquid impact oscillation blocking removal through a continuous oil pipe and a nozzle, the traditional nozzle is mainly divided into a fixed porous nozzle and a rotary nozzle, the quantity of the fixed nozzle is limited, the cleaning of a full section is difficult to realize, the parameter design range of the traditional internal spiral-flow type nozzle is limited, good practicability is difficult to achieve, a centralizing mechanism matched with the traditional blocking removal oil pipe is difficult to achieve good laminating effect with a horizontal well wall, the centralizing effect is limited, blocking removal and removal blocking objects are difficult to be effectively collected, and secondary blocking is easy to be caused along with water flow movement. Publication number CN108843274A, publication number 2018-11-20 discloses a hydraulic jet self-rotating drag bit and a carbon dioxide injection well plugging removing process, which solve the problems of low speed, high cost and complex operation of the conventional freezing plugging treatment mode, and the hydraulic jet self-rotating drag bit is used for injecting heating and pressurizing fluid, crushing and dissolving a freezing plugging layer by means of the hot melting action of the injection fluid, the crushing action of the drag bit and the impact action of the injection fluid, so that the purpose of plugging and drilling thaw plugging sections is achieved, and meanwhile, a circulation system carries broken freezing plugging material scraps out of a shaft in time, so that the continuous operation of the device is ensured. After the carbon dioxide injection well is frozen and blocked, the drill bit and the process have the advantages of simplicity in operation, low construction cost and wide application range, and provide guarantee for large-scale application of carbon dioxide oil displacement technology. The publication No. CN112240179B, publication No. 2021-05-04 relates to a novel hydraulic injection blocking remover, which comprises a filter, a short pipe, a cylinder, a motor, a reciprocating mechanism and a rotating disk, wherein the filter and the cylinder are respectively and fixedly connected at the upper end and the lower end of the short pipe, the motor is fixedly arranged in the cylinder through a motor bracket, the power input end of the reciprocating mechanism is connected with the output shaft of the motor, and the power output end of the reciprocating mechanism is fixedly connected with the rotating disk. The construction process is simple, the construction cost is low, and the treatment depth is large. Meanwhile, the emulsifying agent is sprayed in a rotating way, so that the jet flow of the emulsifying agent impacts the scale on the inner wall of the sleeve in the radial direction and the tangential direction, the scale is easier to remove, and the descaling effect is effectively improved. The downhole rotational flow blocking remover comprises a rotational flow body, a fluid passing body, a connecting body and a bearing seat which are sequentially connected from top to bottom, wherein a spiral groove is formed in the outer side of a main body of the rotational flow body, an eccentric reverse circulation flow passing hole is formed in the side wall of the fluid passing body, a piston sleeve is arranged on the outer side of the fluid passing body, a spring jacket is connected to the lower end of the piston sleeve, the spring jacket is locked on the connecting body through a safety pin, a spring is installed in the spring jacket and clamped between the spring jacket and the connecting body, a filter and a single-flow valve are installed at the lower part of the fluid passing body, a rotating shaft is arranged in