CN116006124B - Self-rotating guiding setting device - Google Patents
Self-rotating guiding setting device Download PDFInfo
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- CN116006124B CN116006124B CN202111619780.4A CN202111619780A CN116006124B CN 116006124 B CN116006124 B CN 116006124B CN 202111619780 A CN202111619780 A CN 202111619780A CN 116006124 B CN116006124 B CN 116006124B
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention relates to the technical field of oilfield drilling and cementing, in particular to a self-rotating guide setting device which comprises a connecting pipe, a valve body, a sealing sliding sleeve, a tongue plate, a guide cone, an inclined spray hole, a self-filling hole, an anti-slip ring, a shear pin, a runner, a groove, a scraping groove and a central control processor. According to the invention, the bypass type self-filling hole and the annular flow passage are arranged on the side surface of the valve body, so that sundries can be prevented from blocking the self-filling hole in the well descending process of the device, the pressure difference between the inside and the outside of the device is maintained at a preset value, and the use efficiency of the device is effectively improved; meanwhile, the self-filling hole is plugged by arranging the sealing sliding sleeve in the valve body, so that the sealing plug is prevented from falling into the well to become underground sundries, the problem that the internal flow channel is easy to be blocked by impurities in the well fluid to cause difficult well descending when the conventional guide shoe is used for well descending is further solved, and the use efficiency of the device is further improved.
Description
Technical Field
The invention relates to the technical field of oilfield drilling and cementing, in particular to a self-rotating guiding setting device.
Background
When the oil field is used for well drilling and cementing operation, the sleeve is required to be put into a preset position in the well, cement slurry is injected for well cementing, but in the process of the sleeve is put into the well, the condition that the well is blocked due to sediment and rock of the well wall is easy to happen, and guide shoes are required to be installed at the top end of the sleeve for auxiliary guiding and well descending. In the process of going into the well, the guide shoe is communicated with the inside and the outside environment of the casing, and when the guide shoe reaches the preset position in the well and the cement slurry is injected into the well, the top end of the casing is required to be plugged in a one-way manner through the guide shoe, so that fluid in the well cannot enter the inside of the casing. The existing guide shoes are generally internally provided with sealing plugs, the sealing plugs are provided with straight barrel type flow passages with the same directions as the two ends of the sealing plugs, in the well descending process, fluid in the well enters the sleeve through the flow passages, and because the flow passages are straight barrel type, sundries such as sand broken stone in the fluid in the well easily block the flow passages, so that the well descending is difficult; after self-priming and well cementation are completed, the sealing plug is required to be extruded into the well downwards through the setting rubber plug, so that the flip cover on one side of the sealing plug is closed to unidirectionally plug the sleeve after the sealing plug is detached, the sealing plug becomes underground sundries after falling into the well, the subsequent underground operation can be influenced, and the environment is not protected enough.
In the prior art, although the sealing plug connected with the sleeve exists, the sealing plug is only connected with the sleeve, impurities are easy to accumulate in the sealing plug in the use process, the sealing plug is blocked, so that the pressure difference between the inside and the outside of the sealing plug is increased, the sealing plug cannot be lowered to a preset underground position, and the use efficiency is low.
Disclosure of Invention
Therefore, the invention provides a self-rotation guiding setting device which is used for solving the problem of low use efficiency caused by the fact that the pressure difference between the inside and the outside of a sealing plug cannot be maintained at a preset value in the prior art.
To achieve the above object, the present invention provides a self-rotation guide setting device comprising:
the guide cone is used for assisting the casing to be lowered into a specified position in the well, and an inclined spray hole is obliquely formed in the end part of the guide cone and used for conveying fluid in the well to the inside of the device when the device is lowered into the well;
one end of the connecting pipe is connected with the guide cone and is used for loading the underground fluid conveyed by the guide cone when the device assists the casing to go into the well; one end of the connecting pipe, which is far away from the guide cone, is connected with the sleeve pipe and is used for conveying cement slurry or drilling fluid output by the sleeve pipe to the guide cone;
the valve body is arranged inside the connecting pipe and fixedly connected with the connecting pipe, and is used for limiting the flowing direction of fluid, cement slurry or drilling fluid in the connecting pipe; the side wall of the valve body is provided with a self-filling hole for conveying fluid outside the valve body into the valve body, the outer diameter of the valve body on one side of the self-filling hole, which is close to the guide cone, is smaller than the inner diameter of the connecting pipe, and the difference value between the inner diameter of the connecting pipe and the outer diameter of the valve body at the position is smaller than the diameter of the self-filling hole; the end part of the valve body, which is close to the guide cone, is movably connected with a tongue plate, and the tongue plate can be opened towards the guide cone, so that the valve body can convey cement paste or drilling fluid to the connecting pipe through a valve body port where the tongue plate is positioned and prevent fluid from entering the valve body through the valve body port where the tongue plate is positioned; the side wall of the valve body is also provided with a shear pin hole;
The sealing sliding sleeve is arranged in the valve body and fixedly connected with the valve body through a shear pin, one end of the sealing sliding sleeve, which is far away from the guide cone, is provided with a sealing surface, and a flow passage is formed in the sealing surface for enabling fluid, cement slurry or drilling fluid to pass through the sealing sliding sleeve; the outer wall of the sealing sliding sleeve is provided with a plurality of grooves, and the grooves are uniformly arranged on the same normal line of the outer wall of the sealing sliding sleeve and are matched with the shear pin holes to load the shear pins; when the shearing pin is loaded by using different grooves and matching the shearing pin holes so as to fix the sealing sliding sleeve at a designated position in the valve body, the side wall of the sealing sliding sleeve shields part of the self-filling hole so as to limit the flow of fluid entering the valve body through the self-filling hole.
Further, the self-rotation guiding setting device also comprises a central control processor which is arranged on the well and used for monitoring the actual working state of the self-rotation guiding setting device in real time and adjusting the working parameters of corresponding parts in the device to corresponding values when the actual working state of the self-rotation guiding setting device is judged to be not in accordance with the standard; the inclined spray hole is internally provided with a first flow detector for detecting the flow of fluid, cement slurry or drilling fluid flowing through the inclined spray hole, and the runner is internally provided with a second flow detector for detecting the flow of fluid, cement slurry or drilling fluid flowing through the runner; the central control processor is respectively connected with the first flow detector and the second flow detector and is used for judging the working state of the self-rotation guiding setting device according to the flow of fluid, cement slurry or drilling fluid in the inclined spray hole and the flow channel.
Further, when the self-rotation guide setting device is lowered into the well, the central control processor controls the first flow detector to detect the flow rate Qa of the fluid passing through the inclined nozzle hole and controls the second flow detector to detect the flow rate Qb of the fluid passing through the flow passage,
if qa=0, the central control processor determines that fluid is not flowing into the device and does not determine the operational status of components in the device;
if Qa > 0 and qb=0, the central control processor determines that fluid is not flowing to the flow channel and does not determine the operational status of components in the device;
if Qa is greater than 0 and Qb is greater than 0, the central control processor calculates a lower well flow difference deltaqa when the flow rate of the fluid at the corresponding position is completed, and sets deltaqa=qa-Qb according to whether the components in the deltaqa judging device are in normal operation or not;
the central control processor is provided with a first preset lower well flow difference delta Qa1, a second preset lower well flow difference delta Qa2 and a third preset lower well flow difference delta Qa3, wherein delta Qa1 < [ delta ] Qa2 < [ delta ] Qa3; when the central control processor determines whether the components in the device are operating normally based on deltaqa,
if delta Qa is less than or equal to delta Qa1, the central control processor judges that the device normally operates and does not judge the operation state of components in the device;
If delta Qa1 is less than delta Qa2, the tightness of the tongue plate of the central control processor is not in accordance with the standard and the tightness of the tongue plate is controlled to be adjusted by the corresponding parts;
if delta Qa2 is less than delta Qa3, the central control processor judges that the gap of the self-filling hole, which is close to one side of the guide cone, is blocked, and the central control processor controls the valve body to rotate so as to remove impurities accumulated at the gap;
if Δqa >. Δqa3, the central control processor determines that fluid is not flowing to the flow channel, determines that the device is operating properly and does not determine the operational status of components in the device.
Further, the tongue plate is connected with the valve body through a spring, a moving mechanism is arranged in the inner wall of one side of the valve body close to the tongue plate, and the moving mechanism is connected with the spring and used for adjusting the compactness of the tongue plate and the valve body;
when the tightness of the tongue plate of the central control processor does not meet the standard, the central control processor controls the moving mechanism to move along the direction far away from the guide cone and calculates a lower well flow difference delta Qa 'in real time in the moving process, and if delta Qa' is less than or equal to delta Qa1, the central control processor judges that the device normally operates and controls the moving mechanism to stop moving;
if delta Qa' > deltaQa 1, the central control processor controls the moving mechanism to continuously move along the direction far away from the guide cone until the difference value of the moving lower well flow is smaller than or equal to a first preset lower well flow difference delta Qa1;
If the moving mechanism moves to the critical position and delta Qa' > [ delta ] Qa1, the central control processor judges that the fitting degree of the tongue plate or the valve body does not meet the standard, judges that the device fails and sends out maintenance alarm.
Further, the central control processor is also provided with a first preset duty ratio B1, a second preset duty ratio B2, a first preset lower well flow difference correction coefficient alpha 1 and a second preset lower well flow difference correction coefficient alpha 2, wherein B1 is more than B2, and 0.8 is more than alpha 2, and alpha 1 is more than 0.9; before the well is drilled, a user sets the shear pins in the corresponding grooves according to the requirements, the central control processor corrects the preset well flow difference according to the area occupation ratio B of the sealing sliding sleeve for shielding the self-filling hole,
if B is less than or equal to B1, the central control processor does not correct each preset well flow difference;
if B1 is more than B and less than or equal to B2, the central control processor corrects the preset well flow difference by using alpha 1;
if B is more than B2, the central control processor corrects the preset well flow difference by using alpha 2;
when the central control processor corrects the preset lower well flow difference by using the i preset lower well flow difference correction coefficient alpha, setting i=1, 2, and marking the corrected j preset lower well flow difference as delta Qaj ', and setting delta Qaj' = delta Qaj multiplied by alpha, wherein j=1, 2,3.
Further, the device also comprises a plurality of setting rubber plugs, when the device reaches a designated position, the central control processor controls the setting rubber plugs to enter the sleeve and slide into the connecting pipe in the sleeve and stay at one end of the valve body far away from the guide cone, and the central control processor conveys a plurality of setting rubber plugs into the sleeve, so that the setting rubber plugs apply pressure to the valve body and the grooves shear the shear pins so that the sealing sliding sleeve seals the self-filling holes; when the pressure applied by the setting rubber plug to the sealing sliding sleeve reaches a preset value, the central control processor controls the sleeve to convey drilling fluid or slurry into the device, controls the first flow detector to detect the flow Qc of the drilling fluid or slurry passing through the inclined spray hole and controls the second flow detector to detect the flow Qd of the drilling fluid or slurry passing through the flow channel, and after detection, the central control processor calculates a liquid discharge flow difference delta Qb and judges whether components in the device normally operate according to the delta Qb, and the delta Qb=qd-Qc is set.
Further, a first preset liquid discharge difference delta Qb1 and a second preset liquid discharge difference delta Qb2 are arranged in the central control processor, wherein delta Qb1 < [ delta ] Qb2, when the central control processor judges whether the components in the device normally operate according to the liquid discharge flow difference delta Qb,
If delta Qb is less than or equal to delta Qb1, the central control processor judges that the device normally operates and does not judge the operation state of components in the device;
if delta Qb1 is less than or equal to delta Qb2, the central control processor judges that the sealing sliding sleeve does not completely block the self-filling hole and controls the corresponding component to adjust the operation parameters of the sealing sliding sleeve;
if delta Qb > -delta Qb2, the central control processor judges that the tension of the spring on the tongue plate is overlarge and controls the moving mechanism to continuously move along the direction close to the guide cone until delta Qb is less than or equal to delta Qb1.
Further, a pin shearing device is arranged in the pin shearing hole, and when the central control processor judges that the self-filling hole is not completely blocked by the sealing sliding sleeve and controls the corresponding component to adjust the operation parameters of the sealing sliding sleeve, the central control processor controls the pin shearing device to start so as to cut off the pin.
Further, a plurality of anti-slip rings are arranged in the valve body and used for preventing the sealing sliding sleeve from sliding in the valve body due to vibration.
Further, scraping grooves are formed in the outer side wall of the guide cone.
Compared with the prior art, the device has the beneficial effects that by arranging the bypass type self-filling hole and the annular flow passage on the side surface of the valve body, sundries can be prevented from blocking the self-filling hole in the well descending process of the device, so that the pressure difference between the inside and the outside of the device is maintained at a preset value, and the use efficiency of the device is effectively improved; meanwhile, the self-filling hole is plugged by arranging the sealing sliding sleeve in the valve body, so that the sealing plug is prevented from falling into the well to become underground sundries, the problem that the internal flow channel is easy to be blocked by impurities in the well fluid to cause difficult well descending when the conventional guide shoe is used for well descending is further solved, and the use efficiency of the device is further improved.
Further, the self-rotation guiding setting device also comprises a central control processor, a first flow detector and a second flow detector, and the device can quickly and accurately judge the actual flowing condition of the fluid, the cement paste or the drilling fluid in the device and accurately judge whether the device has a fault or not by detecting the flow of the fluid, the cement paste or the drilling fluid flowing through the inclined spray hole and the self-pouring hole in real time, so that the situation that the device cannot go down to a preset position due to the operation of the fault component is effectively avoided, and the use efficiency of the device is further improved.
Further, when the self-rotation guiding setting device is lowered into the well, the central control processor controls the first flow detector to detect the flow Qa of the fluid passing through the inclined spray hole and controls the second flow detector to detect the flow Qb of the fluid passing through the flow passage and make a determination on the specific condition of the fluid in the device and the operation state of the corresponding part in the process of lowering the device according to Qa and Qb.
Further, a moving mechanism is arranged in the inner wall of one side of the valve body, which is close to the tongue plate, and is connected with a spring, so that when the tightness of the tongue plate and the valve body is not in accordance with the standard, the central control processor controls the moving mechanism to move along the direction away from the guide cone, calculates a lower well flow difference delta Qa 'in real time in the moving process, and adjusts the specific position of the moving mechanism to a corresponding value according to the delta Qa', and the invention can adjust the position of the moving mechanism to the corresponding value according to the actual running condition of the device by arranging the moving mechanism, thereby effectively adjusting the tension of the spring to the tongue plate to the corresponding value, effectively improving the fitting degree of the tongue plate and the valve body, effectively avoiding the occurrence of blockage caused by excessive accumulation of impurities in a connecting pipe while effectively avoiding the impurities from entering the valve body through gaps of the tongue plate and the valve body.
Further, a first preset duty ratio B1, a second preset duty ratio B2, a first preset lower well flow difference correction coefficient α1 and a second preset lower well flow difference correction coefficient α2 are further arranged in the central control processor, before the well is closed, a user sets the shear pin in the corresponding groove according to the requirement, and the central control processor corrects the preset lower well flow difference according to the area duty ratio B of the self-filling hole shielded by the sealing sliding sleeve.
Further, when the central control processor judges that the pressure applied by the setting rubber plug to the sealing sliding sleeve reaches a preset value, the casing pipe is controlled to convey drilling fluid or slurry into the device, a liquid discharge flow difference delta Qb is calculated, and whether the parts in the device normally operate or not is judged according to the liquid discharge flow difference delta Qb.
Further, the first preset liquid discharge difference delta Qb1 and the second preset liquid discharge difference delta Qb2 are arranged in the central control processor, and whether the components in the device normally operate or not is judged according to the liquid discharge flow difference delta Qb, so that the detection efficiency of the device for the components in the device is further improved, the situation that the device cannot open the inside of the sleeve due to the operation of the fault components is further avoided, and the use efficiency of the device is further improved.
Further, a shear pin shearing device is arranged in the shear pin hole, and when the central control processor judges that the sealing sliding sleeve does not completely block the self-filling hole and controls the corresponding component to adjust the operation parameters of the sealing sliding sleeve, the central control processor controls the shear pin shearing device to start so as to cut off the shear pin.
Drawings
FIG. 1 is a schematic view of the internal structure of a self-rotating guide setting device according to the present invention;
fig. 2 is a schematic view of the external structure of the self-rotation guide setting device according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Which are respectively an internal structure schematic diagram and an external structure schematic diagram of the self-rotation guiding setting device. The self-rotation guiding setting device of the present invention comprises:
The guide cone 5 is used for assisting the casing to be lowered into a specified position in the well, and an inclined spray hole 6 is obliquely formed at the end part of the guide cone 5 and used for conveying underground fluid into the device when the device is lowered into the well; the outer side wall of the guide cone 5 is provided with a scraping groove 12;
a connecting pipe 1, one end of which is connected with the guide cone 5, for loading the downhole fluid conveyed by the guide cone 5 when the device assists the casing to go into the well; one end of the connecting pipe 1, which is far away from the guide cone 5, is connected with the casing pipe and is used for conveying cement paste or drilling fluid output by the casing pipe to the guide cone 5;
a valve body 2 disposed inside the connection pipe 1 and fixedly connected with the connection pipe 1 for defining a flow direction of fluid, cement slurry or drilling fluid in the connection pipe 1; the side wall of the valve body 2 is provided with a self-filling hole 7 for conveying fluid outside the valve body 2 into the valve body 2, the outer diameter of the valve body 2 at one side of the self-filling hole 7 close to the guide cone 5 is smaller than the inner diameter of the connecting pipe 1, and the difference value between the inner diameter of the connecting pipe 1 and the outer diameter of the valve body 2 is smaller than the diameter of the self-filling hole 7; the end part of the valve body 2, which is close to the guide cone 5, is movably connected with a tongue plate 4, and the tongue plate 4 can be opened towards the guide cone 5, so that the valve body 2 can convey cement paste or drilling fluid to the connecting pipe 1 through a port of the valve body 2 where the tongue plate 4 is positioned, and fluid is prevented from entering the valve body 2 through a port of the valve body 2 where the tongue plate 4 is positioned; the side wall of the valve body 2 is also provided with a shear pin hole; a plurality of anti-slip rings 8 are arranged in the valve body 2 and used for preventing the sealing sliding sleeve 3 from sliding in the valve body 2 due to vibration;
The sealing sliding sleeve 3 is arranged in the valve body 2 and is fixedly connected with the valve body 2 through a shear pin 9, the sealing sliding sleeve 3 is a circular tube, one end of the circular tube far away from the guide cone 5 is provided with a sealing surface, and a flow passage 10 is formed in the sealing surface and is used for enabling fluid, cement slurry or drilling fluid to pass through the sealing sliding sleeve 3; the outer wall of the sealing sliding sleeve 3 is provided with a plurality of grooves 11, and each groove 11 is uniformly arranged on the same normal line of the outer wall of the sealing sliding sleeve 3 and is used for being matched with the shearing pin hole to load the shearing pin 9; when the shear pins 9 are loaded using different ones of the grooves 11 in cooperation with the shear pin holes to secure the sealing sleeve 3 in a designated position within the valve body 2, the side walls of the sealing sleeve 3 block portions of the self-priming holes 7 to restrict the flow of fluid through the self-priming holes 7 into the valve body 2.
Before the well is put down, the self-rotating guide shoe is required to be connected with the sleeve 1, the sealing sliding sleeve 3 is firstly inserted into the valve body 2 from the opening at one end of the valve body 2 far away from the guide cone 5, after the insertion depth of the sealing sliding sleeve 3 is adjusted, the shearing pin 9 is inserted into the shearing pin hole and the corresponding groove 11 on the outer wall of the sealing sliding sleeve 3, so that the sealing sliding sleeve 3 is fixed in the valve body 2, and the anti-slip ring 8 in the valve body 2 is contacted with the sealing sliding sleeve 3 to prevent the sealing sliding sleeve 3 from shearing the shearing pin 9 in advance due to vibration during the well down. After the sealing sliding sleeve 3 is installed, the valve body 2 is fixed inside the sleeve 1, and finally the guide cone 5 is connected with the top end of the sleeve 1. The self-rotating guide shoe and the sleeve 1 which are connected are put into the well, the groove on the guide cone 5 in the process of putting into the well scrapes the mud on the well wall, the guide cone 5 is driven to rotate due to resistance in the process of scraping the mud, and the tip of the eccentric guide cone 5 can stir and pull out the mud in the rotating process of the guide cone 5, so that the well is put into the well more smoothly.
In the process of entering, fluid in a well enters the guide cone 5 through the inclined spray hole 6 of the guide cone 5, then enters the self-filling hole 7 on the side wall of the valve body 2 from the annular flow channel 10 between the valve body 2 and the inner wall of the sleeve 1, then enters the valve body 2 through the self-filling hole 7, and finally enters the sleeve 1 from the flow channel 10 on the sealing sliding sleeve 3.
Stopping lowering when the self-rotating guide shoe reaches the preset position in the pit. Cement slurry for well cementation and drilling fluid are sequentially injected into the well, the cement slurry or the drilling fluid enters the sleeve 1, enters the valve body 2 through the runner 10 on the sealing sliding sleeve 3 when reaching the top end of the sleeve 1, and the tongue plate 4 at the opening is jacked up, so that the tongue plate 4 is opened towards the direction of the guide cone 5, the cement slurry or the drilling fluid enters the guide cone 5, and finally flows into the well from the inclined spray hole 6 of the guide cone 5. After cement slurry and drilling fluid are injected, a spring arranged between the tongue plate 4 and the valve body 2 drives the tongue plate 4 to rotate towards the valve body 2 through self elasticity, so that the tongue plate 4 is attached to an opening at one end of the valve body 2, which is close to the guide cone 5, and the opening is plugged again. When in setting, a setting rubber plug is put into the sleeve 1, so that the setting rubber plug reaches the sealing sliding sleeve 3, the sealing sliding sleeve 3 is pushed to move towards the direction close to the tongue plate 4 in the valve body 2, the shearing pin 9 connected between the sealing sliding sleeve 3 and the valve body 2 is sheared when the sealing sliding sleeve 3 moves, when the sealing sliding sleeve 3 moves to one end close to the tongue plate 4 in the valve body 2, the sealing sliding sleeve 3 and the self-filling hole 7 are completely overlapped, the side wall of the sealing sliding sleeve 3 completely seals the self-filling hole 7, and the in-well fluid is prevented from entering the sleeve 1, so that the setting of the sealing sliding sleeve 3 is completed.
Specifically, the scraping groove 12 is a groove on the guide cone 5, the directions of two ends of the groove are the same as the axial direction of the guide cone 5, and the groove is used for scraping the sludge through the scraping groove 12 when the guide cone 5 runs into the well and encounters resistance such as sludge in the well, so that the running into the well is smoother.
According to the invention, the bypass type self-filling hole 7 and the annular flow channel 10 are arranged on the side surface of the valve body 2, so that sundries can be prevented from blocking the self-filling hole 7 in the well descending process of the device, the internal and external pressure difference of the device is maintained at a preset value, and the use efficiency of the device is effectively improved; meanwhile, the self-filling hole 7 is plugged by arranging the sealing sliding sleeve 3 in the valve body 2, so that the sealing plug is prevented from falling into the underground to become underground sundries, the problem that the internal flow channel 10 is easy to be blocked by impurities in fluid in the well to cause difficult well descending when the conventional guide shoe is used for well descending is further solved, and the use efficiency of the device is further improved.
With continued reference to fig. 1 and 2, the self-rotation guiding setting device of the present invention further includes a central control processor (not shown) disposed on the well for monitoring the actual working state of the self-rotation guiding setting device in real time and adjusting the working parameters of the corresponding components in the device to the corresponding values when the actual working state of the self-rotation guiding setting device is determined to be not in accordance with the standard; the inclined spray hole 6 is provided with a first flow detector (not shown) for detecting the flow of the fluid, cement slurry or drilling fluid flowing through the inclined spray hole 6, and the flow channel 10 is provided with a second flow detector (not shown) for detecting the flow of the fluid, cement slurry or drilling fluid flowing through the flow channel 10; the central control processor is respectively connected with the first flow detector and the second flow detector, and is used for judging the working state of the self-rotation guiding setting device according to the flow rates of fluid, cement slurry or drilling fluid in the inclined spray hole 6 and the flow channel 10.
According to the invention, through detecting the flow of the fluid, the cement slurry or the drilling fluid flowing through the inclined spray hole 6 and the self-pouring hole 7 in real time, the actual flowing condition of the fluid, the cement slurry or the drilling fluid in the device can be rapidly and accurately judged, and whether a fault part exists in the device or not is accurately judged, so that the situation that the device cannot go down to a preset position due to the operation of the fault part is effectively avoided, and the use efficiency of the device is further improved.
With continued reference to fig. 1 and 2, when the self-rotation-guided setting device of the present invention is lowered downhole, the central control processor controls the first flow detector to detect the flow rate Qa of the fluid passing through the inclined nozzle hole 6 and controls the second flow detector to detect the flow rate Qb of the fluid passing through the flow passage 10,
if qa=0, the central control processor determines that fluid is not flowing into the device and does not determine the operational status of components in the device;
if Qa > 0 and qb=0, the central control processor determines that fluid is not flowing to the flow channel 10 and does not determine the operational status of components in the device;
if Qa is greater than 0 and Qb is greater than 0, the central control processor calculates a lower well flow difference deltaqa when the flow rate of the fluid at the corresponding position is completed, and sets deltaqa=qa-Qb according to whether the components in the deltaqa judging device are in normal operation or not;
The central control processor is provided with a first preset lower well flow difference delta Qa1, a second preset lower well flow difference delta Qa2 and a third preset lower well flow difference delta Qa3, wherein delta Qa1 < [ delta ] Qa2 < [ delta ] Qa3; when the central control processor determines whether the components in the device are operating normally based on deltaqa,
if delta Qa is less than or equal to delta Qa1, the central control processor judges that the device normally operates and does not judge the operation state of components in the device;
if delta Qa1 is less than delta Qa2, the tightness of the tongue plate 4 of the central control processor is not in accordance with the standard and the tightness of the tongue plate 4 is controlled to be adjusted by the corresponding parts;
if delta Qa2 is less than delta Qa3, the central control processor judges that the gap of the self-filling hole 7, which is close to one side of the guide cone 5, is blocked, and the central control processor controls the valve body 2 to rotate so as to remove impurities accumulated at the gap;
if Δqa >. Δqa3, the central control processor determines that fluid is not flowing to the flow channel 10, determines that the device is operating properly and does not determine the operational status of components in the device.
According to the invention, the first flow detector detects the flow Qa of the fluid passing through the inclined spray hole 6 and controls the second flow detector to detect the flow Qb of the fluid passing through the flow channel 10, and the judgment is made on the specific condition of the fluid in the device and the running state of the corresponding part in the down-hole process of the device according to the flow Qa and the flow Qb, so that the corresponding detection mode can be effectively selected according to the actual condition of the fluid in the device, the detection efficiency of the device for the part in the device can be effectively improved, meanwhile, when the detection of the corresponding part is judged to be required, the quick and accurate judgment is made on the actual running condition of the part according to the difference value of the flow Qa and the flow Qb, the detection efficiency of the device for the part in the device is further improved, the situation that the device cannot be down-hole to the preset position due to the running of the fault part is further avoided, and the use efficiency of the device is further improved.
With continued reference to fig. 1 and 2, the tongue plate 4 is connected with the valve body 2 through a spring, and a moving mechanism (not shown) is arranged in the inner wall of one side of the valve body 2 close to the tongue plate 4, and the moving mechanism is connected with the spring for adjusting the compactness of the tongue plate 4 and the valve body 2;
when the tightness of the tongue plate 4 of the central control processor does not meet the standard, the central control processor controls the moving mechanism to move along the direction far away from the guide cone 5 and calculates a lower well flow difference delta Qa 'in real time in the moving process, and if delta Qa' is less than or equal to delta Qa1, the central control processor judges that the device normally operates and controls the moving mechanism to stop moving;
if delta Qa '>' delta Qa1, the central control processor controls the moving mechanism to continuously move along the direction far away from the guide cone 5 until the difference of the moving lower well flow is smaller than or equal to a first preset lower well flow difference delta Qa1;
if the moving mechanism moves to the critical position and delta Qa' > [ delta ] Qa1, the central control processor determines that the degree of adhesion of the tongue plate 4 or the valve body 2 does not meet the standard, determines that the device fails, and sends out a maintenance alarm.
According to the invention, the position of the moving mechanism is adjusted to the corresponding value according to the actual running condition of the device, and the tension of the spring to the tongue plate 4 can be effectively adjusted to the corresponding value, so that the fitting degree of the tongue plate 4 and the valve body 2 is effectively improved, impurities are effectively prevented from entering the valve body 2 through the gap between the tongue plate 4 and the valve body 2, the situation that the blockage is caused by excessive impurity accumulation in the connecting pipe 1 is effectively avoided, and the use efficiency of the device is further improved.
With continued reference to fig. 1 and fig. 2, the central control processor of the present invention is further provided with a first preset duty ratio B1, a second preset duty ratio B2, a first preset downhole well flow difference correction coefficient α1 and a second preset downhole well flow difference correction coefficient α2, where B1 is greater than B2, and 0.8 is greater than α2 and greater than α1 is less than 0.9; before the well is run, a user sets the shear pins 9 in the corresponding grooves 11 according to the requirements, the central control processor corrects the preset well flow difference according to the area occupation ratio B of the sealing sliding sleeve 3 shielding the self-filling hole 7,
if B is less than or equal to B1, the central control processor does not correct each preset well flow difference;
if B1 is more than B and less than or equal to B2, the central control processor corrects the preset well flow difference by using alpha 1;
if B is more than B2, the central control processor corrects the preset well flow difference by using alpha 2;
when the central control processor corrects the preset lower well flow difference by using the i preset lower well flow difference correction coefficient alpha, setting i=1, 2, and marking the corrected j preset lower well flow difference as delta Qaj ', and setting delta Qaj' = delta Qaj multiplied by alpha, wherein j=1, 2,3.
According to the invention, the preset well flow difference is corrected according to the area occupation ratio of the self-filling hole 7 shielded by the sealing sliding sleeve 3 by setting a plurality of preset occupation ratios and corresponding preset well flow difference correction coefficients, so that the situation that the central control processor in the running process of the device misjudges the actual running state of the device can be effectively avoided, and the use efficiency of the device is further improved.
With continued reference to fig. 1 and 2, the device of the present invention further includes a plurality of setting rubber plugs, when the device reaches a specified position, the central control processor controls the setting rubber plugs to enter the sleeve and slide into the connecting pipe 1 in the sleeve and stay at one end of the valve body 2 far away from the guide cone 5, the central control processor conveys the plurality of setting rubber plugs into the sleeve, so that the setting rubber plugs apply pressure to the valve body 2, and the groove 11 shears the shear pin 9 so that the sealing sliding sleeve 3 seals the self-filling hole 7; when the central control processor judges that the pressure applied by the setting rubber plug to the sealing sliding sleeve 3 reaches a preset value, the casing is controlled to convey drilling fluid or slurry into the device, the first flow detector is controlled to detect the flow Qc of the drilling fluid or slurry passing through the inclined spray hole 6 and the second flow detector is controlled to detect the flow Qd of the drilling fluid or slurry passing through the flow channel 10, and after detection, the central control processor calculates a liquid discharge flow difference delta Qb and judges whether components in the device normally operate according to the delta Qb, and delta Qb=qd-Qc is set.
When the detection of the corresponding component is required, the invention makes a quick and accurate determination on the actual running condition of the component according to the difference value of Qc and Qd, and further improves the detection efficiency of the device for the component in the device, and simultaneously further avoids the situation that the device cannot open the inside of the sleeve caused by the running of the fault component, thereby further improving the use efficiency of the device.
With continued reference to fig. 1 and 2, the central control processor of the present invention is provided with a first preset drain difference Δqb1 and a second preset drain difference Δqb2, where Δqb1 </Δqb2, when the central control processor determines whether components in the device are operating normally according to the drain flow difference Δqb,
if delta Qb is less than or equal to delta Qb1, the central control processor judges that the device normally operates and does not judge the operation state of components in the device;
if delta Qb1 is less than or equal to delta Qb2, the central control processor judges that the sealing sliding sleeve 3 does not completely seal the self-filling hole 7 and controls corresponding components to adjust the operation parameters of the sealing sliding sleeve 3;
if DeltaQb > DeltaQb2, the central control processor judges that the tension of the spring on the tongue plate 4 is overlarge and controls the moving mechanism to continue to move along the direction close to the guide cone 5 until DeltaQb is less than or equal to DeltaQb 1.
According to the invention, whether the components in the device normally run or not is judged according to the drain flow difference delta Qb, so that the detection efficiency of the device for the components in the device is further improved, and the situation that the device cannot open the inside of the sleeve due to the running of the fault components is further avoided, thereby further improving the use efficiency of the device.
With continued reference to fig. 1 and 2, in the present invention, a pin shearing device is disposed in the pin hole, and when the central control processor determines that the sealing sliding sleeve 3 does not completely seal the self-filling hole 7 and controls the corresponding components to adjust the operation parameters of the sealing sliding sleeve 3, the central control processor controls the pin shearing device to start so as to cut off the pin 9.
According to the invention, by arranging the shear pin shearing device, the situation that the self-filling hole 7 cannot be completely plugged due to the fact that the shear pin 9 cannot be sheared by the sealing sliding sleeve 3 can be effectively avoided, so that the use efficiency of the device is further improved.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A self-rotating guide setting device, comprising:
the guide cone is used for assisting the casing to be lowered into a specified position in the well, and an inclined spray hole is obliquely formed in the end part of the guide cone and used for conveying fluid in the well to the inside of the device when the device is lowered into the well;
one end of the connecting pipe is connected with the guide cone and is used for loading the underground fluid conveyed by the guide cone when the device assists the casing to go into the well; one end of the connecting pipe, which is far away from the guide cone, is connected with the sleeve pipe and is used for conveying cement slurry or drilling fluid output by the sleeve pipe to the guide cone;
the valve body is arranged inside the connecting pipe and fixedly connected with the connecting pipe, and is used for limiting the flowing direction of fluid, cement slurry or drilling fluid in the connecting pipe; the side wall of the valve body is provided with a self-filling hole for conveying fluid outside the valve body into the valve body, the outer diameter of the valve body on one side of the self-filling hole, which is close to the guide cone, is smaller than the inner diameter of the connecting pipe, and the difference value between the inner diameter of the connecting pipe and the outer diameter of the valve body at the position is smaller than the diameter of the self-filling hole; the end part of the valve body, which is close to the guide cone, is movably connected with a tongue plate, and the tongue plate can be opened towards the guide cone, so that the valve body can convey cement paste or drilling fluid to the connecting pipe through a valve body port where the tongue plate is positioned and prevent fluid from entering the valve body through the valve body port where the tongue plate is positioned; the side wall of the valve body is also provided with a shear pin hole;
The sealing sliding sleeve is arranged in the valve body and fixedly connected with the valve body through a shear pin, one end of the sealing sliding sleeve, which is far away from the guide cone, is provided with a sealing surface, and a flow passage is formed in the sealing surface for enabling fluid, cement slurry or drilling fluid to pass through the sealing sliding sleeve; the outer wall of the sealing sliding sleeve is provided with a plurality of grooves, and the grooves are uniformly arranged on the same normal line of the outer wall of the sealing sliding sleeve and are matched with the shear pin holes to load the shear pins; when the shearing pin is loaded by using different grooves and matching the shearing pin holes so as to fix the sealing sliding sleeve at a designated position in the valve body, the side wall of the sealing sliding sleeve shields part of the self-filling hole so as to limit the flow of fluid entering the valve body through the self-filling hole;
the self-rotation guiding setting device also comprises a central control processor which is arranged on the well and used for monitoring the actual working state of the self-rotation guiding setting device in real time and adjusting the working parameters of corresponding parts in the device to corresponding values when the actual working state of the self-rotation guiding setting device is judged to be out of the standards; the inclined spray hole is internally provided with a first flow detector for detecting the flow of fluid, cement slurry or drilling fluid flowing through the inclined spray hole, and the runner is internally provided with a second flow detector for detecting the flow of fluid, cement slurry or drilling fluid flowing through the runner; the central control processor is respectively connected with the first flow detector and the second flow detector and is used for judging the working state of the self-rotation guiding setting device according to the flow of fluid, cement slurry or drilling fluid in the inclined spray hole and the flow channel;
When the self-rotation guiding setting device is lowered into the well, the central control processor controls the first flow detector to detect the flow rate Qa of the fluid passing through the inclined spray hole and controls the second flow detector to detect the flow rate Qb of the fluid passing through the flow passage,
if qa=0, the central control processor determines that fluid is not flowing into the device and does not determine the operational status of components in the device;
if Qa > 0 and qb=0, the central control processor determines that fluid is not flowing to the flow channel and does not determine the operational status of components in the device;
if Qa is greater than 0 and Qb is greater than 0, the central control processor calculates a lower well flow difference deltaqa when the flow rate of the fluid at the corresponding position is completed, and sets deltaqa=qa-Qb according to whether the components in the deltaqa judging device are in normal operation or not;
the central control processor is provided with a first preset lower well flow difference delta Qa1, a second preset lower well flow difference delta Qa2 and a third preset lower well flow difference delta Qa3, wherein delta Qa1 < [ delta ] Qa2 < [ delta ] Qa3; when the central control processor determines whether the components in the device are operating normally based on deltaqa,
if delta Qa is less than or equal to delta Qa1, the central control processor judges that the device normally operates and does not judge the operation state of components in the device;
If delta Qa1 is less than delta Qa2, the tightness of the tongue plate of the central control processor is not in accordance with the standard and the tightness of the tongue plate is controlled to be adjusted by the corresponding parts;
if delta Qa2 is less than delta Qa3, the central control processor judges that the gap of the self-filling hole, which is close to one side of the guide cone, is blocked, and the central control processor controls the valve body to rotate so as to remove impurities accumulated at the gap;
if delta Qa > -delta Qa3, the central control processor determines that fluid is not flowing to the flow channel, determines that the device is operating normally and does not determine the operational status of components in the device;
the tongue plate is connected with the valve body through a spring, and a moving mechanism is arranged in the inner wall of one side of the valve body, close to the tongue plate, and is connected with the spring for adjusting the compactness of the tongue plate and the valve body;
when the tightness of the tongue plate of the central control processor does not meet the standard, the central control processor controls the moving mechanism to move along the direction far away from the guide cone and calculates a lower well flow difference delta Qa 'in real time in the moving process, and if delta Qa' is less than or equal to delta Qa1, the central control processor judges that the device normally operates and controls the moving mechanism to stop moving;
if delta Qa' > deltaQa 1, the central control processor controls the moving mechanism to continuously move along the direction far away from the guide cone until the difference value of the moving lower well flow is smaller than or equal to a first preset lower well flow difference delta Qa1;
If the moving mechanism moves to the critical position and delta Qa' > [ delta ] Qa1, the central control processor judges that the fitting degree of the tongue plate or the valve body does not meet the standard, judges that the device fails and sends out maintenance alarm.
2. The self-rotating guide setting device according to claim 1, wherein the central control processor is further provided with a first preset duty ratio B1, a second preset duty ratio B2, a first preset lower well flow difference correction coefficient α1 and a second preset lower well flow difference correction coefficient α2, wherein B1 is smaller than B2, and 0.8 is smaller than α2 is smaller than α1 and smaller than 0.9; before the well is drilled, a user sets the shear pins in the corresponding grooves according to the requirements, the central control processor corrects the preset well flow difference according to the area occupation ratio B of the sealing sliding sleeve for shielding the self-filling hole,
if B is less than or equal to B1, the central control processor does not correct each preset well flow difference;
if B1 is more than B and less than or equal to B2, the central control processor corrects the preset well flow difference by using alpha 1;
if B is more than B2, the central control processor corrects the preset well flow difference by using alpha 2;
when the central control processor corrects the preset lower well flow difference by using the i preset lower well flow difference correction coefficient alpha, setting i=1, 2, and marking the corrected j preset lower well flow difference as delta Qaj ', and setting delta Qaj' = delta Qaj multiplied by alpha, wherein j=1, 2,3.
3. The self-rotating guide setting device according to claim 1, further comprising a plurality of setting rubber plugs, wherein when the device reaches a specified position, the central control processor controls the setting rubber plugs to enter the sleeve and slide into the connecting pipe in the sleeve and stay at one end of the valve body far away from the guide cone, the central control processor conveys the plurality of setting rubber plugs into the sleeve, the setting rubber plugs apply pressure to the valve body, and the grooves shear the shear pins so that the sealing sliding sleeve seals the self-pouring hole; when the pressure applied by the setting rubber plug to the sealing sliding sleeve reaches a preset value, the central control processor controls the sleeve to convey drilling fluid or slurry into the device, controls the first flow detector to detect the flow Qc of the drilling fluid or slurry passing through the inclined spray hole and controls the second flow detector to detect the flow Qd of the drilling fluid or slurry passing through the flow channel, and after detection, the central control processor calculates a liquid discharge flow difference delta Qb and judges whether components in the device normally operate according to the delta Qb, and the delta Qb=qd-Qc is set.
4. A self-rotating guide setting device according to claim 3, characterized in that the central control processor is provided with a first preset drain difference Δqb1 and a second preset drain difference Δqb2, wherein Δqb1 </Δqb2, when the central control processor determines from the drain flow difference Δqb whether the components in the device are operating normally,
If delta Qb is less than or equal to delta Qb1, the central control processor judges that the device normally operates and does not judge the operation state of components in the device;
if delta Qb1 is less than or equal to delta Qb2, the central control processor judges that the sealing sliding sleeve does not completely block the self-filling hole and controls the corresponding component to adjust the operation parameters of the sealing sliding sleeve;
if delta Qb > -delta Qb2, the central control processor judges that the tension of the spring on the tongue plate is overlarge and controls the moving mechanism to continuously move along the direction close to the guide cone until delta Qb is less than or equal to delta Qb1.
5. The self-rotating guide setting device according to claim 4, wherein a shear pin shearing device is arranged in the shear pin hole, and when the central control processor judges that the sealing sliding sleeve does not completely seal the self-pouring hole and controls the corresponding component to adjust the operation parameters of the sealing sliding sleeve, the central control processor controls the shear pin shearing device to start so as to cut off the shear pin.
6. The self-rotating guide setting device according to claim 1, wherein a plurality of anti-slip rings are further arranged in the valve body to prevent the sealing sliding sleeve from sliding in the valve body due to vibration.
7. A self-rotating guide setting device according to claim 1, characterized in that the guide cone outer side wall is provided with scraping grooves.
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| CN202111619780.4A CN116006124B (en) | 2021-12-27 | 2021-12-27 | Self-rotating guiding setting device |
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| CN116006124B true CN116006124B (en) | 2023-07-18 |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2385079Y (en) * | 1999-08-13 | 2000-06-28 | 胜利油田钻井北星工贸公司 | Drillable casing automatic fill-up float shoe |
| US6810958B2 (en) * | 2001-12-20 | 2004-11-02 | Halliburton Energy Services, Inc. | Circulating cementing collar and method |
| US6802374B2 (en) * | 2002-10-30 | 2004-10-12 | Schlumberger Technology Corporation | Reverse cementing float shoe |
| US7322412B2 (en) * | 2004-08-30 | 2008-01-29 | Halliburton Energy Services, Inc. | Casing shoes and methods of reverse-circulation cementing of casing |
| AU2006213805B2 (en) * | 2005-02-11 | 2010-08-26 | Baker Hughes Incorporated | One trip cemented expandable monobore liner system and method |
| CN102628346A (en) * | 2012-05-09 | 2012-08-08 | 常熟市石油固井工具有限公司 | Self-filling type flow velocity-regulable float collar-float shoe device |
| CN205382909U (en) * | 2016-01-19 | 2016-07-13 | 丹诺(北京)石油技术服务有限公司 | Static pressure is closed wholely from irritating formula float shoe |
| CN205577943U (en) * | 2016-04-25 | 2016-09-14 | 中国石油集团渤海钻探工程有限公司 | Well cementation valve is closed to plug that can irritate certainly |
| CN106499362B (en) * | 2016-10-11 | 2017-06-23 | 王震 | Sleeve pipe automatic grouting bypass type bruising device |
| CN207004476U (en) * | 2017-08-11 | 2018-02-13 | 中国石油天然气股份有限公司 | Mutual flow-through pressure balance type bruising device |
| CN207315247U (en) * | 2017-10-18 | 2018-05-04 | 中国石油集团渤海钻探工程有限公司 | A kind of self-priming float collar |
| CN207420537U (en) * | 2017-10-18 | 2018-05-29 | 中国石油集团渤海钻探工程有限公司 | Self-aiming rotates float shoe |
| CN210798891U (en) * | 2019-11-07 | 2020-06-19 | 闻明 | Self-grouting float collar |
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