CN216277791U - While-drilling bypass device for horizontal well section - Google Patents
While-drilling bypass device for horizontal well section Download PDFInfo
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- CN216277791U CN216277791U CN202120916828.7U CN202120916828U CN216277791U CN 216277791 U CN216277791 U CN 216277791U CN 202120916828 U CN202120916828 U CN 202120916828U CN 216277791 U CN216277791 U CN 216277791U
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Abstract
The utility model discloses a drill-following bypass device for a horizontal well section, which solves the problem of safe, reliable and rapid drill jamming of the horizontal well section, the utility model relates to the problem of well leakage accidents, which comprises a wellhead circulating device, an underground while-drilling processing device and a horizontal well salvaging device, wherein the underground while-drilling processing device comprises a piston, a leaking stoppage short section and a back-off short section, the leaking stoppage short section is detachably and coaxially connected with the back-off short section, a side wall close to the upper end of the leaking stoppage short section is provided with a bypass hole, the piston is coaxially arranged in the leaking stoppage short section, the outer wall of the upper end of the piston is connected with the inner wall of the leaking stoppage short section through an elastic piece, a shaft section close to the lower end of the piston is provided with a limiting device, the limiting device is detachably connected with the back-off short section, the horizontal well salvaging device is used for salvaging a leaking stoppage ball, the wellhead circulating device is provided with a high-pressure supply port, and the high-pressure supply port is used for being connected with a well pipe so as to provide forward power for the leaking stoppage ball. The utility model has the advantages of safe, reliable and fast processing underground drill sticking and well leakage accidents, etc.
Description
Technical Field
The utility model relates to the technical field of petroleum production, in particular to a while-drilling bypass device for a horizontal well section.
Background
The horizontal well section is the most serious and complex accident in the well drilling engineering and the most difficult to handle underground accident, which affects the safe well drilling, endangers the equipment and personal safety, causes a great waste of time, cost and other resources, and if an effective solution cannot be taken as soon as possible, a series of chain reactions can be generated, even finally the well mouth is scrapped.
The drill sticking usually occurs at places with large outer diameters of drilling tools, such as positions of a drill bit, a centralizer and a drill collar, if measures such as acid bubbles, jarring and the like cannot be removed, only a back-off milling method is adopted for processing, but back-off is also a relatively complex procedure, fastening is carried out before back-off, accurate calculation is carried out according to the weight of the drilling tool above a stuck point, the buoyancy and the abrasion resistance of slurry, the weight of the drilling tool needs to be lifted up to open the drilling tool at the required position, the complex procedures need to take much time to complete, the optimal time for accident processing can be delayed, and further deterioration of accidents is caused.
Therefore, a system capable of comprehensively treating the stuck drill, the lost circulation and the salvage and drop-in instrument of the horizontal well section is urgently needed.
Disclosure of Invention
The utility model aims to solve the technical problem of safely, reliably and quickly processing the drilling sticking and leakage accidents of a horizontal well section and aims to provide a while-drilling bypass device for the horizontal well section.
The utility model is realized by the following technical scheme:
a while-drilling bypass device for a horizontal well section comprises a well mouth circulating device, a downhole while-drilling processing device and a horizontal well fishing device, wherein the downhole while-drilling processing device comprises a piston, a leaking stoppage short section with an axial through hole and a back-off short section with the axial through hole, the lower end of the leaking stoppage short section is coaxially connected with the detachable upper end of the back-off short section, a bypass hole is formed in the side wall, close to the upper end, of the leaking stoppage short section, the piston is coaxially arranged in the through hole of the leaking stoppage short section, the outer wall of the upper end of the piston is connected with the inner wall of the leaking stoppage short section through an elastic piece, the elastic piece can provide elasticity for the piston so that the piston has a sliding trend relative to the leaking stoppage short section, the lower end of the piston is positioned in the through hole of the back-off short section, a shaft section, close to the lower end, of the piston is provided with a limiting device, the limiting device is detachably connected with the back-off short section so as to rotationally limit the back-off short section, the horizontal well salvaging device is used for salvaging the plugging ball, the horizontal well salvaging device is provided with an elastic buckle matched with a salvaging spear of the plugging ball, the wellhead circulating device is provided with a high-pressure supply port which is used for being connected with a well pipe so as to provide forward power for the plugging ball, a sealing component used for sealing a cable is also arranged in the wellhead circulating device, under the working state of bypass plugging, the plugging ball pushes a piston to move downwards through the pressure provided by the wellhead circulating device so that the upper end surface of the piston is positioned below a bypass hole, the bypass hole is in an open state so as to inject plugging liquid, under the working state of back-off, the plugging ball pushes the piston to move downwards through the pressure provided by the wellhead circulating device so as to separate a limiting device of the piston from the back-off nipple, and the back-off nipple is in a rotatable state so as to separate the back-off from the plugging nipple, under the working state of fishing the blocking balls, the horizontal well fishing device realizes the fishing of the blocking balls by matching the pressure provided by the wellhead circulating device with the blocking balls.
The utility model carries out system integration on the wellhead circulating device, the underground while-drilling processing device and the horizontal well salvaging device, thereby effectively and safely processing underground complex accidents, in particular to the conditions of well leakage and drill sticking which occur in a horizontal well section. The underground while-drilling processing device is connected with an underground drilling tool, so that the underground accident is avoided, the time for processing the accident is saved, when the well leakage occurs, a plugging ball is manually put in from a wellhead circulating device, at the moment, pressure is applied to the well through a high-pressure generating source, the plugging ball moves forwards along the extension direction of the well under the action of the pressure of the plugging ball, after the plugging ball is contacted with a piston, the piston is pushed downwards by the plugging ball until the top surface of the piston is positioned below a bypass hole, at the moment, the bypass hole communicates the inside of the plugging short section with the annulus outside of the plugging short section, and plugging liquid is injected into the well to achieve the effect of underground plugging; when the sticking takes place, then continue to exert pressure in the well on the basis of carrying out the operation that leaking stoppage impeld the piston to descend and make the stifled ball further impel the piston to descend, separate with the back-off nipple joint up to the stop device of piston, alright make drilling tool counter rotation in order to reach the back-off effect this moment. When carrying out stifled ball and salvaging, the cable can seal through well head circulating device's seal assembly to make the high pressure take place the function and the sealed function collection of cable in an organic whole, reduced unnecessary seal structure's use, improved the treatment effeciency of complicated problem in the pit.
According to the utility model, the horizontal well fishing device needs to be matched with a fishing spear on a plugging ball to salvage the plugging ball, belongs to the prior art, and can be reasonably implemented by technical personnel in the field according to the prior art.
As a specific implementation mode, the through hole of the leaking stoppage nipple is a stepped hole, the drift diameter of the upper end of the leaking stoppage nipple is larger than that of the lower end of the leaking stoppage nipple, the radial section of the piston is T-shaped, the diameter of the upper end of the piston is larger than that of the lower end of the piston, one end of the elastic part is connected to the lower end face of the large-diameter section of the piston, and the other end of the elastic part is connected to the lower end face of the large-drift diameter section of the leaking stoppage nipple. Through the structural arrangement of leaking stoppage nipple joint and piston, the gap reservation between piston and leaking stoppage nipple joint is avoided, thereby ensuring that the piston or leaking stoppage nipple joint is small in size on the whole and being beneficial to the lifting of the leaking stoppage nipple joint. In this embodiment, the elastic component can be along the spring of piston circumference equipartition, also can be along the hydraulic stem of piston circumference equipartition, can also be along the shell fragment of piston circumference equipartition, and the mode of arranging of circumference equipartition is for making the direction of piston stress along the axial of piston.
Further, the elastic piece is a spring and is sleeved on the small-diameter section of the piston. When the elastic piece is in spring sleeve joint with the piston, the number of the elastic piece is one, so that the cost is saved, and meanwhile, the assembly process is simpler due to the adoption of the spring.
Furthermore, the upper end of the through hole of the leaking stoppage nipple is in threaded fit with a blocking ring, and the blocking ring is in contact with the upper end of the piston to limit the piston in the axial direction. After the stop ring is in threaded fit with the leaking stoppage nipple, the stop ring can be adjusted relative to the position of the leaking stoppage nipple, so that the contact areas of the two ends of the spring and the piston and the leaking stoppage nipple are increased, and the elastic direction provided by the spring is closer to the axial direction of the piston.
Preferably, the opening at the upper end of the piston is provided in a conical shape, and the diameter of the conical upper end is larger than that of the conical lower end. When leaking stoppage and back-off, this opening need be by stifled ball shutoff, through setting up to the toper back, the shutoff face of stifled ball corresponds sets up to the toper, then at the shutoff in-process, conical opening is spacing to stifled ball formation in its self circumference, prevents that the shutoff that the ball deflection appears and lead to is inefficacious.
Preferably, the wellhead circulating device comprises a three-way pipe body, a sealing assembly and a sealing cover, the drift diameter of a port a of the three-way pipe body is enlarged to form a sealing cylinder, a port b of the three-way pipe body serves as a high-pressure supply port, the port b is coaxial with the port a, a port c of the three-way pipe body is used for being connected with a high-pressure generating source, the sealing assembly is arranged in the sealing cylinder, the sealing cover is provided with a threaded connection end matched with the outer wall of the port a, the sealing cover is sleeved on the outer wall of the port a and is in threaded fit, and the sealing assembly is pressed in the sealing cylinder through the sealing cover. The sealing assembly is used for sealing a cable of the horizontal well fishing device, sealing the sealing cover after the horizontal well fishing device enters the well, and providing pressure in the well through the high-pressure generating source to enable the horizontal well fishing device to move forwards. The arrangement of the sealing component prevents the pressure relief.
Further, the sealing assembly comprises a rubber core, a core support and an extrusion block, the core support, the rubber core and the extrusion block are sequentially and coaxially arranged in the sealing cylinder, the rubber core comprises a first rubber core and a second rubber core, the first rubber core is provided with a first contact plane, a first cable groove which is axially communicated with the sealing cylinder is formed in the first contact plane, the first cable groove is provided with a plurality of expanding sections along the axial direction of the sealing cylinder, the second rubber core is provided with a second contact plane, a second cable groove which is axially communicated with the sealing cylinder is formed in the second contact plane, the second cable groove is provided with a plurality of expanding sections along the axial direction of the sealing cylinder, when the first contact plane is attached to the second contact plane, the expanding sections of the first cable groove are in one-to-one correspondence with the expanding sections of the second cable groove, and the extrusion block is located between the rubber core and the sealing cover. The structure of centre gripping cable has been formed in gluing the core, improves the sealed effect to the cable.
Further, one end, close to the sealing cover, of the rubber core is arranged to be conical, and the extrusion block is provided with a conical concave surface matched with the conical shape. The extrusion piece has made the cable even in the atress of gluing core port department through conical setting as pressure transmission part, prevents that the cable transition from buckling, prevents that the cable from taking place serious wearing and tearing with gluing core port when sliding.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the utility model relates to a while-drilling bypass device for a horizontal well section, which integrates a wellhead circulating device, an underground while-drilling processing device and a horizontal well salvaging device, thereby effectively and safely processing underground complex accidents, in particular to the conditions of well leakage and drill sticking of the horizontal well section.
2. According to the drill-following bypass device for the horizontal well section, when the horizontal well section is complicated or stuck and the reversing is not needed to be removed by moving, shocking, static bubble and the like, the horizontal well section complicated processing system can perform reversing processing, a drilling tool or an instrument above a leaking stoppage short section is lifted out, the safety of the upper drilling tool or the instrument is ensured, further deterioration of accidents is prevented, and precious time is won for next milling reversing or other accident processing.
3. According to the drilling-while-drilling bypass device for the horizontal well section, the horizontal well section is lost, namely lost circulation, and a horizontal well section complex processing system can timely and effectively perform multiple times of static leakage stoppage and pressure-bearing leakage stoppage of high-concentration and large-particle leakage stoppage materials under the condition that a drill is not pulled out, so that the occurrence of vicious accidents such as blowout, well collapse, drill sticking and the like caused by the reduction or density reduction of a drilling-out liquid level is prevented, and the times of pulling out and drilling down can be effectively reduced.
4. According to the while-drilling bypass device for the horizontal well section, the plugging material enters the annulus from the bypass hole to perform plugging in a bypass mode, various underground instruments and tools can be effectively protected, and normal work cannot be influenced by the plugging material.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
fig. 1 is a schematic cross-sectional structural diagram of a downhole while-drilling treatment device according to an embodiment of the present invention.
Fig. 2 is a schematic view of a radial cross-sectional structure of a downhole while-drilling treatment device according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structural diagram of an wellhead circulation device according to an embodiment of the utility model.
Fig. 4 is a schematic axial side structure diagram of a wellhead circulation device according to an embodiment of the utility model.
FIG. 5 is a schematic structural diagram of a bypass-while-drilling device for a horizontal wellbore section according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a partially enlarged structure of fig. 1 according to the present invention.
Reference numbers and corresponding part names in the drawings:
1-leaking stoppage nipple, 2-reversing nipple, 3-piston, 4-elastic piece, 5-bypass hole, 6-stop ring, 7-limiting device, 8-ball plug, 9-three-way pipe, 10-sealing cylinder, 11-sealing cover, 12-rubber core, 13-extrusion block, 14-core support, 15-while-drilling processing device, 16-horizontal well salvaging device, 17-wellhead circulating device and 18-high pressure generating source.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
A while-drilling bypass device for a horizontal well section is disclosed, as shown in figures 1-6, and comprises a well mouth circulating device 17, a downhole while-drilling processing device 15 and a horizontal well fishing device 16, wherein the downhole while-drilling processing device 15 comprises a piston 3, a leaking stoppage short section 1 with an axial through hole and an inverted short section 2 with an axial through hole, the lower end of the leaking stoppage short section 1 is detachably and coaxially connected with the upper end of the inverted short section 2, a bypass hole 5 is formed in the side wall of the leaking stoppage short section 1 close to the upper end, the piston 3 is coaxially arranged in the through hole of the leaking stoppage short section 1, the outer wall of the upper end of the piston 3 is connected with the inner wall of the leaking stoppage short section 1 through an elastic piece 4, the elastic piece 4 can provide elasticity for the piston 3 to enable the piston 3 to have a sliding tendency relative to the leaking stoppage short section 1, the lower end of the piston 3 is positioned in the through hole of the inverted short section 2, a shaft section close to the lower end of the piston 3 is provided with a limiting device 7, the limiting device 7 is detachably connected with the inverted nipple 2 to rotationally limit the inverted nipple 2, the horizontal well fishing device 16 is used for fishing the blocking ball 8, the horizontal well fishing device 16 is provided with an elastic buckle matched with a fishing spear of the blocking ball 8, the wellhead circulating device 17 is provided with a high-pressure supply port, the high-pressure supply port is used for being connected with a well pipe to provide forward power for the blocking ball 8, under the working state of bypass plugging, the blocking ball 8 pushes the piston 3 to move downwards through pressure provided by the wellhead circulating device 17 so that the upper end face of the piston 3 is positioned below the bypass hole 5, the bypass hole 5 is in an open state to inject plugging liquid, under the working state of inverted plugging, the blocking ball 8 pushes the piston 3 to move downwards through the pressure provided by the wellhead circulating device 17 so that the limiting device 7 of the piston 3 is separated from the inverted nipple 2, the back-off nipple 2 is rotatable so that the back-off nipple 2 can be separated from the leaking stoppage nipple 1, and under the working state of salvaging the plugging ball 8, the horizontal well salvaging device 16 realizes the salvaging of the plugging ball 8 by matching the pressure provided by the wellhead circulating device 17 with the plugging ball 8.
In the embodiment, the wellhead circulating device 17, the underground while-drilling processing device 15 and the horizontal well salvaging device 16 are systematically integrated, so that underground complex accidents are effectively and safely processed, and the method is particularly suitable for the conditions of well leakage and drilling sticking of a horizontal well section. The underground while-drilling processing device 15 is connected with an underground drilling tool, so that the underground accident is avoided, the time for accident processing is saved, when the well leakage occurs, the plugging ball 8 is manually put in from a wellhead circulating device 17, at the moment, pressure is applied to the well through a high-pressure generating source 18, the plugging ball 8 moves forwards along the extension direction of the well under the action of the pressure, after the plugging ball 8 is contacted with the piston 3, the piston 3 is pushed downwards by the plugging ball 8 until the top surface of the piston 3 is positioned below the bypass hole 5, at the moment, the bypass hole 5 communicates the inside of the plugging short section 1 with the annular space outside the plugging short section 1, and the plugging liquid is injected into the well to achieve the effect of underground plugging; when the well is stuck, pressure is continuously applied to the well on the basis of the operation of plugging and propelling the piston 3 to move downwards, so that the plugging ball 8 further propels the piston 3 to move downwards until the limiting device 7 of the piston 3 is separated from the back-off short section 2, and at the moment, the drilling tool can rotate reversely to achieve the back-off effect.
Specifically, leaking stoppage nipple joint 1 and back-off nipple joint 2 are the pipe, the lower extreme of leaking stoppage nipple joint 1 and the upper end processing of back-off nipple joint 2 have the screw thread that can mutually support, leaking stoppage nipple joint 1 and back-off nipple joint 2 pass through screw thread coaxial coupling, the lower extreme latus rectum of leaking stoppage nipple joint 1 equals with the upper end latus rectum of back-off nipple joint 2, radially extend a plurality of rectangular on the inner wall of back-off nipple joint 2 upper end, rectangular major axis direction is parallel with the axis of back-off nipple joint 2, a plurality of rectangular form the spline groove jointly. The drift diameter of the upper end of the leaking stoppage nipple 1 is larger than that of the lower end of the leaking stoppage nipple 1, so that a stepped hole is formed, and the bypass hole 5 is formed in the side wall of the upper end of the leaking stoppage nipple 1. Piston 3 totality is the pipe of T font, 3 coaxial settings of piston are in leaking stoppage nipple joint 1, 3 upper end diameters of piston are greater than the lower extreme diameter, 3 upper ends of piston are located leaking stoppage nipple joint 1 in the great segmentation of diameter, 3 outer walls of piston and the inner wall contact of leaking stoppage nipple joint 1 so that piston 3 forms the jam to by-pass hole 5, be connected with elastic component 4 on the step face that big diameter section and little diameter section meet on the piston 3, elastic component 4 still with leak stoppage nipple joint 1 in the step face that big diameter section and little diameter section meet be connected, elastic component 4 sets up to a plurality of and equipartition in the week of piston 3, derive a plurality of rectangular along circumference on the outer wall of piston 3 lower extreme, a plurality of rectangular formation and spline groove adaptation, spline and spline groove cooperation. In this embodiment, elastic component 4 set up the position and be located piston 3's upper end segmentation, elastic component 4 is to mainly applying the ascending power of axial so that piston 3 resets in piston 3, secondly, elastic component 4's setting has still a positive effect to piston 3, 3 upper end segmentation's of piston circumference is spacing has been played promptly, 3 lower extremes of piston then carry on spacingly through the spline, thereby make piston 3 when the atress is down, piston 3's direction of motion can be close to piston 3's axial, thereby reduce the contact pressure of the production between piston 3 and the leaking stoppage nipple joint 1, allow 3 outer walls of piston and 1 inner wall processing requirements of leaking stoppage to reduce, reduce the processing cost.
In some possible embodiments, when the number of the elastic members 4 is one, the elastic members 4 are arranged as springs, the springs are sleeved on the piston 3, two ends of each spring are limited by the step surface of the piston 3 and the step surface of the leaking stoppage nipple 1 respectively, threads are further processed on the inner wall of the upper end of the leaking stoppage nipple 1, a stopper is coaxially assembled on the inner wall of the upper end of the leaking stoppage nipple 1, and the stopper ring 6 is in contact with the top end of the piston 3. In the embodiment, the direction of the elastic force provided by the spring lock is also determined by the contact area of the spring with the piston 3 and the leaking stoppage nipple 1, in the process of compressing the spring, the contact area between the upper end and the lower end of the spring and the piston 3 and the leaking stoppage nipple 1 is gradually increased, in order to ensure that the direction of the elastic force provided by the spring is close to the axial direction of the piston 3, at least 3/4 spring rings at the upper end and the lower end of the spring are in contact with the piston 3 and the leaking stoppage short section 1, namely, in the initial state, the spring needs to be compressed, which is realized by the blocking ring 6 in the embodiment, the position of the blocking ring 6 in the leaking stoppage nipple 1 can be adjusted by rotating the blocking ring 6, the specific position of the blocking ring 6 needs to be determined according to actual conditions, for example, different springs and different weights of the piston 3 are used to adjust the position of the blocking ring 6, so the specific position of the blocking ring 6 is not limited herein.
In some possible embodiments, the outer wall of the lower end of the piston 3 is slidably connected to the leak-stopping nipple 1, and the sliding direction is along the axial direction of the piston 3. For example, can set up a arch at 3 lower extremes of piston, the inner wall of corresponding leaking stoppage nipple joint 1 sets up one and can holds this bellied recess, and the recess is greater than protruding along 3 axial length of piston, and then the arch can slide in the recess for after spline and spline groove break away from, piston 3 will reset, and protruding and recess then played piston 3 spacing in week this moment, make spline and spline groove can accurate cooperation unimpededly. Specifically, the spline groove of the back-off nipple 2 is fixed to the relative pose of the drilling tool, and the pose of the spline groove can be determined by controlling the rotation amount of the drilling tool, so that after the back-off nipple 2 is separated from the leaking stoppage nipple 1, the pose of the spline groove on the back-off nipple 2 is consistent with that before separation, and at the moment, the piston 3 can be accurately matched without hindrance in the process of aligning out of the back-off nipple 2.
In some possible embodiments, the opening at the upper end of the piston 3 is provided with a conical shape. The upper end opening of the piston 3 needs to be blocked when plugging and reversing are carried out, the upper end opening of the traditional piston 3 is a flat opening, the plugging ball 8 and the upper top surface of the piston 3 are blocked through plane contact, in the plugging mode, the plugging ball 8 is easy to incline relative to the piston 3, so that the plugging effect is weakened, the upper end opening of the piston 3 is set to be conical, the corresponding plugging ball 8 is processed to be in a shape matched with the conical shape, the conical opening has a limiting function on the piston 3 in the circumferential direction after the plugging ball 8 is matched with the piston 3, the plugging failure caused by the inclination of the plugging ball 8 is prevented, more preferably, the upper end opening of the piston 3 is processed to be a spherical concave surface, correspondingly, the plugging surface of the plugging ball 8 is set to be a corresponding spherical shape, even if the plugging ball 8 is inclined due to the matching of the structure, the piston 3 can still be plugged, and the plugging fault tolerance rate is increased.
In some possible embodiments, as a specific embodiment of the wellhead circulation device 17, the wellhead circulation device 17 uses a tee pipe 9 as a main body, a port a and a port b in the tee pipe 9 are used as an outlet and an inlet of a high-pressure source, a sealing cylinder 10 is formed by expanding the diameter of the inner wall of the port c, a sealing assembly is arranged in the sealing cylinder 10, the outer wall of the port c is threaded, the port c is matched with a sealing cover 11 through threads, a through hole coaxial with the port c is formed in the sealing cover 11, the through hole is smaller than the through diameter of the port c, and the sealing assembly is pressed in the sealing cylinder 10 by the sealing cover 11. In this embodiment, the through hole of the sealing cover 11 is used for a cable passing through a downhole tool, because this embodiment is mainly directed to the problem of a horizontal well section to be processed, when the tool travels to the horizontal well section, a certain pressure needs to be provided for the tool to advance, at this time, the wellhead circulating device 17 needs to work, the cable or cable of the tool is located outside the wellhead circulating device 17 through the sealing component to supply current or recover the tool, and because of the existence of the sealing component, a high pressure can be provided for the well through the port b, thereby avoiding the use of the wellhead sealing device, in the existence of the wellhead circulating device 17 in this embodiment, the tool can be thrown into the well through the port a through the port c, and the cable or cable is matched with the sealing component and is arranged in the sealing cylinder 10, thereby making the tool throwing process simpler and reducing the construction flow, save the engineering time, reduce the construction cost that the instrument was put in.
In some possible embodiments, the sealing assembly includes a rubber core 12, a core holder 14 and an extrusion block 13, the core holder 14, the rubber core 12 and the extrusion block 13 are sequentially located in the sealing cylinder 10 along the axial direction of the port c, the rubber core 12 is divided into a first rubber core and a second rubber core, the first rubber core and the second rubber core are matched to form a cylinder with one conical end, the first rubber core has a first matching surface, the second rubber core has a second matching surface, the first matching surface is provided with a first annular through groove with an axial line along the axial direction of the first rubber core, the first rubber core is further provided with a plurality of coaxial first annular grooves along the axial direction of the first annular through groove, the diameter of the first annular groove is larger than that of the first annular through groove, the second matching surface is provided with a second annular through groove with an axial line along the axial direction of the second rubber core, the second annular through groove is further provided with a plurality of coaxial second annular grooves along the axial direction of the second annular through groove, the diameter of the second annular grooves is larger than that of the second annular through groove, after the first rubber core and the second rubber core are matched, the first annular through groove and the second annular through groove are matched to form a cylindrical through groove, and the first annular groove and the second annular groove are matched in a one-to-one correspondence mode to form a cylindrical space. Through the setting of lining up groove and ring channel for the contact of gluey core 12 and cable or cable is the sectional type contact, thereby glues core 12 and the contact surface of cable or cable and be a plurality of cylindrical surfaces, under this contact situation, glues core 12 and the easy emergence deformation of the contact surface of cable or cable, and increase cable or cable are followed gluey core 12 axial slip's resistance, prevent that cable or cable from sliding in gluey core 12, improve sealed effect.
In some possible embodiments, the extrusion block 13 has a tapered concave surface that mates with a taper on one end of the core 12. The squeezing block 13 is used as a pressure transmission component in the present embodiment, and the conical concave surface is provided in the present embodiment, so that the contact area between the squeezing block and the rubber core 12 is increased, the pressure transmission of the pressure is more uniform, the pressure of the rubber core 12 on the cable or the cable is more thorough in the axial direction of the rubber core 12, and the sealing effect is improved.
In some possible embodiments, the horizontal well fishing device 16 includes a fishing unlocking device, the unlocking device has an unlocking outer cylinder, a line passing hole for passing a cable or a cable is formed in a side wall of the unlocking outer cylinder along an axial direction of the unlocking outer cylinder, the line passing hole penetrates through the unlocking outer cylinder along the unlocking device, a locking ring is connected to the unlocking outer cylinder through a bolt, the locking ring is arc-shaped plate-shaped, the curvature of the arc is equal to that of the outer surface of the unlocking outer cylinder, a protrusion is arranged on the inner wall of the locking ring, and the protrusion passes through an opening of the unlocking outer cylinder and is located inside the unlocking outer cylinder. After the locking ring is assembled, the unlocking outer cylinder can slightly deform due to the existence of the opening, external stress can be generated, the locking ring is in a pulled state at the moment, edges are easily generated due to deformation, the unlocking outer cylinder is not favorable for moving underground, and after the protrusion is arranged, the protrusion can limit the deformation of the unlocking outer cylinder, so that the unlocking outer cylinder is more prone to generating internal stress in the assembling process, and the locking ring can be assembled with the unlocking outer cylinder under a smaller fastening condition, and the service life of the locking ring is ensured.
In the utility model, the fishing device and the blocking ball can adopt the existing blocking ball and fishing device.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A while-drilling bypass device for a horizontal well section is characterized by comprising a wellhead circulating device (17), a downhole while-drilling processing device (15) and a horizontal well salvaging device (16);
the underground while-drilling treatment device (15) comprises a piston (3), a leaking stoppage short section (1) with an axial through hole and a reversing short section (2) with the axial through hole, wherein the lower end of the leaking stoppage short section (1) is detachably and coaxially connected with the upper end of the reversing short section (2), and a side wall, close to the upper end, of the leaking stoppage short section (1) is provided with a bypass hole (5);
the piston (3) is coaxially arranged in a through hole of the leaking stoppage nipple (1), the outer wall of the upper end of the piston (3) is connected with the inner wall of the leaking stoppage nipple (1) through an elastic piece (4), the elastic piece (4) can provide elasticity for the piston (3) so that the piston (3) has a sliding trend relative to the leaking stoppage nipple (1), the lower end of the piston (3) is positioned in the through hole of the back-off nipple (2), a shaft section, close to the lower end, of the piston (3) is provided with a limiting device (7), and the limiting device (7) is detachably connected with the back-off nipple (2) to rotatably limit the back-off nipple (2);
the horizontal well fishing device (16) is used for fishing the blocking ball (8), and the horizontal well fishing device (16) is provided with an elastic buckle which is used for being matched with a fishing spear of the blocking ball (8);
the wellhead circulating device (17) is provided with a high-pressure supply port, the high-pressure supply port is used for being connected with a well pipe to provide forward power for the plugging ball (8), and a sealing assembly used for sealing a cable is further arranged in the wellhead circulating device (17).
2. The while-drilling bypass device for the horizontal well section as recited in claim 1, wherein the through hole of the plugging nipple (1) is a stepped hole, and the drift diameter of the upper end of the plugging nipple (1) is larger than that of the lower end;
the radial section of the piston (3) is T-shaped, and the diameter of the upper end of the piston (3) is larger than that of the lower end;
one end of the elastic piece (4) is connected with the lower end face of the large-diameter section of the piston (3), and the other end of the elastic piece is connected with the lower end face of the large drift diameter of the leaking stoppage short section (1).
3. The while drilling bypass device for the horizontal well section as recited in claim 2, wherein the elastic member (4) is a spring, and the elastic member (4) is sleeved on the small diameter section of the piston (3).
4. The while-drilling bypass device for the horizontal well section is characterized in that the upper end of the through hole of the leaking stoppage nipple (1) is in threaded fit with a blocking ring (6), and the blocking ring (6) is in contact with the upper end of the piston (3) to form an axial limit for the piston (3).
5. The while drilling bypass device for a horizontal wellbore section according to claim 1, wherein the opening at the upper end of the piston (3) is provided in a conical shape, the diameter of the conical upper end is larger than that of the conical lower end.
6. The while drilling bypass arrangement for a horizontal wellbore section as claimed in claim 1, wherein the wellhead circulation device (17) comprises a tee (9) body, a seal assembly and a seal gland (11);
the drift diameter of a port a of the three-way pipe (9) body is enlarged to form a sealing cylinder (10), a port b of the three-way pipe (9) body is used as a high-pressure supply port, the port b is coaxial with the port a, and a port c of the three-way pipe (9) body is used for being connected with a high-pressure generating source (18);
the sealing assembly is arranged in the sealing cylinder (10);
the sealing cover (11) is provided with a threaded connection end matched with the outer wall of the port a, the sealing cover (11) is sleeved on the outer wall of the port a and is in threaded fit, and the sealing assembly is pressed in the sealing cylinder (10) through the sealing cover (11).
7. The while drilling bypass device for the horizontal well section as recited in claim 6, wherein the sealing assembly comprises a rubber core (12), a core support (14) and an extrusion block (13), the core support (14), the rubber core (12) and the extrusion block (13) are sequentially and coaxially arranged in a sealing cylinder (10);
the rubber core (12) comprises a first rubber core and a second rubber core;
the first rubber core is provided with a first contact plane, the first contact plane is provided with a first cable groove which is axially communicated with the sealing cylinder (10), and the first cable groove is provided with a plurality of diameter-expanding sections along the axial direction of the sealing cylinder (10);
the second rubber core is provided with a second contact plane, a second cable groove which is axially communicated with the sealing cylinder (10) is formed in the second contact plane, and the second cable groove is provided with a plurality of expanding sections along the axial direction of the sealing cylinder (10);
when the first contact plane is attached to the second contact plane, the diameter expanding sections of the first cable grooves correspond to the diameter expanding sections of the second cable grooves one to one, and the extrusion blocks (13) are located between the rubber cores (12) and the sealing covers (11).
8. The while drilling bypass device for a horizontal well section according to claim 7, characterized in that one end of the rubber core (12) close to the sealing cover (11) is provided with a cone shape, and the squeezing block (13) is provided with a cone concave surface matched with the cone shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120916828.7U CN216277791U (en) | 2021-04-29 | 2021-04-29 | While-drilling bypass device for horizontal well section |
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| CN202120916828.7U CN216277791U (en) | 2021-04-29 | 2021-04-29 | While-drilling bypass device for horizontal well section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113062704A (en) * | 2021-04-29 | 2021-07-02 | 成都高峰石油机械有限公司 | System and method for processing complex problems of horizontal well section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113062704A (en) * | 2021-04-29 | 2021-07-02 | 成都高峰石油机械有限公司 | System and method for processing complex problems of horizontal well section |
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