CN213980752U - Fishing ball control blanking plug - Google Patents
Fishing ball control blanking plug Download PDFInfo
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- CN213980752U CN213980752U CN202022469006.7U CN202022469006U CN213980752U CN 213980752 U CN213980752 U CN 213980752U CN 202022469006 U CN202022469006 U CN 202022469006U CN 213980752 U CN213980752 U CN 213980752U
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Abstract
The utility model relates to a can drag for ball accuse blanking plug. The fishable ball control blanking plug comprises a working barrel, a sealing valve core and a central rod; the stopping structure is fixed on the sealing valve core and is used for being matched with the central rod in a stopping manner in the axial direction when the central rod is salvaged and lifted, so that the central rod drives the sealing valve core to move upwards; a ball locking groove is formed in the inner side of the wall of the working barrel, a ball locking hole extending along the radial direction of the sealing valve core is formed in the sealing valve core, and a locking ball used for being in locking fit with the ball locking groove is arranged in the ball locking hole; the central rod is provided with a lock ball retaining surface for retaining the lock ball in the lock ball groove, and the central rod is provided with a lock ball releasing position in the moving stroke, wherein the lock ball retaining surface and the lock ball are staggered for retracting the lock ball into the mounting cavity. Because the lock ball rolls comparatively in a flexible way, is difficult to block, and locking and unlocking performance is reliable, and the maintenance is convenient, can repeat repetitious usage, and solves the technical problem that the current blanking plug adopts the slider to easily cause the blanking plug to unlock and salvage failure and then reduce the oil gas production efficiency.
Description
Technical Field
The utility model relates to a can drag for ball accuse blanking plug.
Background
At present, when the oil and gas field is operated under pressure, the oil pipe column in the well needs to be internally blocked by a blanking plug, the blockage of the oil pipe is removed after the completion of the well, Chinese patent with the publication of CN205154093U and publication date of 2016.04.13 discloses a gas well blanking plug, which comprises a main body, wherein the main body is a working barrel, a piston, namely a sealing valve core, is arranged in the main body, the lower end of the piston is provided with a conical head, the upper end of the piston is internally provided with an installation cavity, a central rod is arranged in the installation cavity, the lower end of the central rod is provided with a locking slide block, the central rod is provided with a locking slide groove which is matched with the locking slide block, the upper end of the central rod is in threaded connection with a guide shoe central rod, the upper part of the piston is provided with a pin hole, the inner wall of the upper part of the piston is in threaded connection with a back tensioning nut, the upper end of the back tensioning nut is connected with the upper end of the central rod through a shearing pin, when the fishing tool pulls the guide shoe, the guide shoe pulls the central rod to shear the shear pin, after the shear pin is sheared, the central rod is separated from the back nut, the lower end of the central rod releases the blocking effect on the locking sliding block, the locking sliding block can retract into the installation cavity at the moment, the central rod is continuously pulled, the lower end of the central rod is axially stopped and matched with the back nut, the central rod and the piston can be pulled out of the main body, and the fishing operation of the guide shoe and the central rod is realized.
Because the activity flexibility of the sliding block is poor, the phenomenon that the sliding block is not retracted in place easily occurs in the unlocking process, so that the blanking plug is easily unlocked and salvaged to fail, the oil-gas production is influenced, and the production efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can drag for ball accuse blanking plug for solve present blanking plug and adopt the slider to lead to the blanking plug unblock easily and salvage the failure and then reduce oil gas production efficiency's technical problem.
The utility model discloses a can drag for ball accuse blanking plug adopts following technical scheme:
the fishing ball-controlled blanking plug comprises:
the working barrel is connected in series in the pipe column pipe joint;
the sealing valve core is assembled in the working barrel in a sliding and sealing mode, an installation cavity is formed in the sealing valve core, and an installation opening communicated with the installation cavity is formed in the top of the sealing valve core;
the upper end of the central rod is provided with a fishing head, the lower end of the central rod is inserted into the mounting cavity, and the central rod can move up and down relative to the sealing valve core;
the stopping structure is fixed on the sealing valve core and is used for being matched with the central rod in a stopping way in the axial direction when the central rod is salvaged and lifted, so that the central rod drives the sealing valve core to move upwards;
a ball locking groove is formed in the inner side of the wall of the working barrel, a ball locking hole extending along the radial direction of the sealing valve core is formed in the sealing valve core, and a locking ball used for being in locking fit with the ball locking groove is arranged in the ball locking hole;
the central rod is provided with a lock ball retaining surface for retaining the lock ball in the lock ball groove, and the central rod is provided with a lock ball releasing position in the moving stroke, wherein the lock ball retaining surface and the lock ball are staggered for retracting the lock ball into the mounting cavity.
Has the advantages that: set up the lock ball on the sealed case, the lock ball is used for with the locking cooperation of lock ball groove locking, through the position that changes well core rod, and then can make the lock ball holding surface on the well core rod keep the locking relation of lock ball and lock groove before the completion finishes, keep the jam to the tubular column of blanking plug, can make well core rod be in lock ball unblock position after finishing after the well completion, supply lock ball withdrawal installation cavity to relieve the locking relation of lock ball and locking, salvage away the case and the central rod of blanking plug through salvaging well core rod, relieve the shutoff to the tubular column. Because the lock ball rolls comparatively in a flexible way, is difficult to block, and locking and unlocking performance is reliable, and the maintenance is convenient, can repeat repetitious usage, and solves the technical problem that the current blanking plug adopts the slider to easily cause the blanking plug to unlock and salvage failure and then reduce the oil gas production efficiency.
Furthermore, a ball blocking structure used for limiting the lock ball to be separated from the hole at the outer side of the lock ball hole is arranged on the sealed valve core, the position of the ball blocking structure in the axial direction of the sealed valve core is adjustable, and the ball blocking structure is provided with an avoiding position used for opening the hole at the outer side of the lock ball hole and a blocking position used for being matched with the lock ball in a blocking mode to limit the lock ball to be separated from the lock ball hole. The ball blocking structure is convenient for installing the lock ball, and meanwhile, the lock ball is prevented from being separated from the outer hole opening of the lock ball hole, so that the use is convenient.
Furthermore, the ball blocking structure is a ball blocking ring which is installed on the outer wall surface of the sealed valve core in a threaded mode, and the axial position of the ball blocking ring is adjusted by screwing the ball blocking ring. The ball blocking ring is simple in structure and is installed on the piston valve core through threads to be adjusted conveniently.
Furthermore, a concave arc surface is arranged on the part, used for being matched with the lock ball, of the ball blocking ring, and faces towards the lock ball and is used for being matched with the lock ball in a blocking mode. The concave cambered surface is matched with the surface of the lock ball, so that the locking effect on the lock ball is stable, and the lock ball is not easy to damage.
Furthermore, the stopping structure is a centering limit sleeve fixed at one end of the sealing valve core, which is provided with the mounting opening, an annular flange is arranged on the centering limit sleeve, the central rod penetrates through a centering hole defined by the annular flange, the centering limit sleeve is in stopping fit with the central rod in the axial direction through the end face of the annular flange, the centering limit sleeve is assembled on the outer wall surface of the sealing valve core in a threaded manner, and the centering limit sleeve and the ball stopping ring share the external thread on the outer wall surface of the sealing valve core. The centering limit sleeve and the ball retaining ring share the external thread, so that the structure of the sealing valve core is simplified, and the processing is convenient.
Furthermore, the ball blocking ring is matched with the centering limit sleeve in a blocking and stopping manner in the axial direction. The two can be mutually blocked and positioned, and can be prevented from loosening after being tightly pushed.
Furthermore, the stopping structure is a centering limit sleeve fixed at one end of the sealed valve core, which is provided with the mounting opening, an annular flange is arranged on the centering limit sleeve, the central rod penetrates through a centering hole defined by the annular flange, and the centering limit sleeve is in stopping fit with the central rod in the axial direction through the end face of the annular flange. The annular flange forms a centralizing hole and is matched with the central rod in a blocking way, so that the structure is simple and the processing is convenient.
Furthermore, the righting limiting sleeve is assembled on the outer wall surface of the sealing valve core in a threaded mode. The installation of the centralizing stop collar is convenient.
Furthermore, the central rod is provided with a locking ball unlocking groove, and the locking ball unlocking groove is opposite to the locking ball when the central rod is in blocking fit with the blocking structure, so that the locking ball can retract into the mounting cavity. The position of lock ball can be kept to the lock ball unlocking groove, avoids the lock ball to fall to the installation cavity bottom, the used repeatedly of being convenient for.
Furthermore, after the central rod is inserted into the mounting cavity to the bottom, the central rod is in stop fit with the bottom wall of the mounting cavity by means of gravity to keep the position of the central rod, and the locking ball retaining surface keeps the locking ball to be locked with the locking ball groove. The position of the central rod is kept by gravity, so that the structure of the central rod is simplified, and the processing and the assembly are convenient.
Drawings
Fig. 1 is a schematic structural view of a locking ball and a locking ball groove in a specific embodiment 1 of the salvageable ball control plug of the present invention in a locked state;
FIG. 2 is a schematic structural view of a locking ball and a locking ball groove in a specific embodiment 1 of the salvageable ball control plug of the present invention in an unlocked state;
FIG. 3 is a schematic structural view of a plug body in the specific embodiment 1 of the salvageable ball-controlled plug of the present invention;
FIG. 4 is a schematic structural view of a working barrel in the specific embodiment 1 of the salvageable ball-control blanking plug of the present invention;
FIG. 5 is a schematic structural view of a centering sleeve in the embodiment 1 of the salvageable ball-control plug of the present invention;
FIG. 6 is a schematic structural view of a ball retainer ring in the specific embodiment 1 of the salvageable ball control plug of the present invention;
FIG. 7 is a schematic structural view of a sealing valve core in the specific embodiment 1 of the salvageable ball-controlled blanking plug of the present invention;
in the figure: 1-a working barrel; 11-internal connecting screw thread; 12-ball locking groove; 13-external connecting screw thread; 14-a sealing face; 15-a limit step; 2-fishing the head; 21-barb buckle; 3-a central rod; 31-ball retention surface; 32-a stop step; 33-ball-lock unlocking slot; 4-righting the stop collar; 41-righting the hole; 42-an annular flange; 43-connecting screw thread; 5-ball blocking ring; 51-connecting screw thread; 52-concave arc surface; 6-locking the ball; 7-a valve core; 71-connecting screw threads; 72-ball-locking hole; 73-a limit step; 74-seal groove; 75-end guide cone; 76-a mounting cavity; 8-sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses can drag for ball accuse blanking plug's embodiment 1:
as shown in fig. 1 to 7, the salvageable ball control plug comprises a working barrel 1, a fishing head 2, a central rod 3, a centering limit sleeve 4, a ball blocking ring 5, a locking ball 6, a sealing valve core 7 and a sealing ring 8. Wherein the fishing head 2, the center rod 3, the centering limit sleeve 4, the ball retaining ring 5, the locking ball 6, the sealing valve core 7 and the sealing ring 8 form a blocking body, and the blocking body is matched with the working barrel 1 to realize the blocking of the pipe column.
The working barrel 1 is used for being connected in series in a pipe joint of a pipe column, the working barrel 1 is of a hollow structure, and the blocking body is located in the working barrel 1. The upper end of the working barrel 1 is provided with an internal connecting thread 11, the internal connecting thread 11 is used for being in threaded connection with an upper pipe column pipe joint, and the inner side of the barrel wall in the middle of the working barrel 1 is provided with a ball locking groove 12 used for being matched with a locking ball 6 in a locking manner to realize unlocking and locking of the blocking body. The lower end of the working barrel 1 is provided with an external connecting thread 13, and the external connecting thread 13 is used for being in threaded connection with a lower pipe column pipe joint. The inner wall surface of the bottom of the working barrel 1 is a smooth sealing surface 14, and the upper side of the sealing surface 14 is provided with a limit step 15 which is matched with the sealing valve core 7 in an axial stop way.
The sealing valve core 7 is assembled in the working barrel 1 in a sliding and sealing mode, an installation cavity 76 is formed in the sealing valve core 7, and an installation opening communicated with the installation cavity 76 is formed in the top of the sealing valve core 7, namely the top of the installation cavity is opened; the sealed valve core 7 is provided with a lock ball hole 72 which extends along the radial direction of the sealed valve core 7, the lock ball 6 is arranged in the lock ball hole 72, the lock ball 6 is used for locking and matching with the lock ball groove 12, and after the lock ball is locked with the lock ball groove, the sealed valve core 7 is locked and cannot move up and down in the working barrel.
The outer wall surface of the mounting opening of the sealed valve core 7 is provided with a connecting thread 71, and the righting limit sleeve 4 and the ball retaining ring 5 are both in threaded connection with the sealed valve core 7 through the connecting thread 71; the sealing valve core 7 comprises a working barrel matching section positioned on the lower side of the mounting cavity 76, and a sealing ring 8 is arranged on the working barrel matching section. The working barrel matching section is provided with a limiting step 73 and a sealing groove 74, and the sealing ring 8 is arranged in the sealing groove 74 to realize internal sealing with the working barrel 1. The limiting step 73 is used for being matched with the working barrel 1 in a blocking mode, and a tail end guide cone 75 is arranged on the lower side of the matching section of the working barrel.
The lower end of the central rod 3 is movably inserted into the mounting cavity 76 through a mounting hole, the upper end of the central rod 3 is in threaded connection with the lower portion of the fishing head 2, the middle of the central rod 3 is provided with a stopping step 32, the stopping step 32 is used for righting the limiting sleeve 4 for stopping and matching, the lower portion of the central rod 3 is provided with a ball locking unlocking groove 33, and when the central rod 3 is in stopping and matching with the righting limiting sleeve 4, namely the central rod 3 is located at a ball locking unlocking position in a moving stroke, the ball locking unlocking groove 33 is opposite to the ball locking 6, and the ball locking 6 can retract into the mounting cavity 76.
The central rod 3 is provided with a ball retaining surface 31 for retaining the ball 6 in the ball groove 12, the ball retaining surface 31 is positioned at the upper side of the ball unlocking groove 33, after the central rod 3 is inserted into the mounting cavity 76 to the bottom, the central rod 3 keeps the position of the central rod 3 by means of the stop and matching of gravity and the bottom wall of the mounting cavity 76, so that the ball retaining surface 31 keeps the ball 6 locked with the ball groove 12. When the center rod 3 is at the lock ball release position in the active stroke, the lock ball holding surface 31 is displaced from the lock ball 6.
In order to facilitate the installation of the lock ball 6, the ball retainer ring 5 is installed on the outer wall surface of the seal valve core 7 in a threaded manner, the ball retainer ring 5 is of a hollow ring structure, the inner side of the ball retainer ring 5 is provided with a connecting thread 51 in threaded connection with the seal valve core 7, one axial end of the ball retainer ring 5 is provided with an inward concave surface 52 for matching with the lock ball 6, the inward concave surface 52 faces the lock ball 6 and is used for blocking and matching with the lock ball 6, and the ball retainer ring 5 plays a blocking role for the lock ball 6.
The position of the ball retainer 5 can be adjusted by screwing the ball retainer 5, and the ball retainer 5 has an escape position for opening the outer side opening of the ball hole 72 and a stop position for stop-fitting with the ball 6 to restrict the ball 6 from coming out of the ball hole 72 from the outer side opening of the ball hole 72. When the ball blocking ring 5 is in the avoiding position, the lock ball 6 can be loaded in, and when the ball blocking ring 5 is in the avoiding position, the lock ball 6 can be limited from being separated from the outer side hole of the lock ball hole 72. The ball retainer ring 5 in this embodiment constitutes a ball retainer structure.
The centering and limiting sleeve 4 is fixed at one end of the sealing valve core 7, which is provided with a mounting opening, an annular flange 42 is arranged on the centering and limiting sleeve 4, the central rod 3 passes through a centering hole 41 defined by the annular flange 42, and the centering and limiting sleeve is in stop fit with the stop step 32 of the central rod 3 in the axial direction through the end surface of the annular flange 42 and is used for enabling the central rod 3 to drive the sealing valve core 7 to move upwards when the central rod 3 is lifted upwards. The centering and limiting sleeve 4 in this embodiment forms a stopping structure which is used for stopping and matching with the central rod in the axial direction when the central rod is lifted by fishing.
The centering hole 41 centers the center rod 3, and the lower part of the centering limit sleeve 4 is provided with a connecting thread 43 matched with the connecting thread 71, so that the centering limit sleeve 4 is assembled on the outer wall surface of the sealed valve core 7 in a threaded manner.
In this embodiment, the centering and limiting sleeve 4 and the ball retainer ring 5 share the external thread on the outer wall surface of the sealing valve core 7, the ball retainer ring 5 and the centering and limiting sleeve 4 are in stop fit in the axial direction, and can be stopped mutually, and the ball retainer ring and the centering and limiting sleeve can play a role in locking when being tightly matched in a propping manner, so as to prevent play.
The upper part of the fishing head 2 is provided with a fishing barb buckle 21, and the fishing barb buckle 21 is matched with a fisher to finish fishing the blocking body; the lower part of the fishing head 2 is provided with a connecting thread which is used for being in threaded connection with the central rod 3.
When the plug is assembled, the center rod 3 is inserted into the mounting cavity 76 and inserted to the bottom, the lock ball 6 is mounted in the lock ball hole 72 from the outer hole of the lock ball hole 72, and the mounting retainer blocks the lock ball 6 to restrict the lock ball 6 from being removed from the lock ball hole 72. And (5) installing a centering sleeve, a fishing head and a sealing ring to complete the assembly of the blanking plug.
After the assembly of the blanking plug is completed, the locking ball 6 is positioned in the locking ball hole 72 of the sealed valve core 7 and the locking ball groove 12 of the working barrel 1, the locking ball unlocking groove 33 on the central rod 3 is positioned below the locking ball 6, and the lower end face of the central rod 3 is supported at the bottom of the mounting cavity 76. The sealing valve core 7 of the blanking plug is in a ball locking state through the locking ball 6 and the locking ball groove 12 of the working barrel 1, relative movement cannot occur in the axial direction, meanwhile, a sealing ring 8 on the sealing valve core 7 is sealed with a smooth sealing surface 14 of the working barrel 1, and the blanking plug is in a locking sealing state.
The utility model discloses when blanking plug went into the well, according to the design requirement the lower part screw thread 13 and the upper portion screw thread 11 of working barrel 1 link to each other with the tube coupling end screw thread of both sides about the blanking plug respectively, go into the design position in the pit shaft down. In the process, the sealing valve core 7 of the blanking plug is always in a ball lock state through the locking ball 6, the locking ball hole 72 of the sealing valve core 7 and the locking ball groove 12 of the working barrel 1 and cannot move up and down, and meanwhile, the sealing ring 8 on the sealing valve core 7 is sealed with the smooth sealing surface 14 of the working barrel 1, so that high-pressure fluid in a pipe column below the blanking plug is prevented from entering the pipe column above the blanking plug, and the smooth operation of safely lowering the pipe column under pressure is ensured.
After the completion string is put in place, the steel wire is salvaged to block the body, a special fishing tool is put into the well string along with the steel wire until an inner fishing slip of the fishing tool is meshed with the barb buckle 21 of the fishing head 2, then the steel wire is lifted up to apply force, the fishing head 2 drives the central rod 3 to move upwards because the working barrel 1 is fixed, after the stopping step 32 in the middle of the central rod 3 and the annular flange 42 of the centralizing limiting sleeve 4 are stopped, the locking ball unlocking groove 33 of the central rod 3 is opposite to the locking ball hole 72 of the sealing valve core 7 and the locking ball groove 12 of the working barrel 1, the locking ball 6 loses the support of the locking ball retaining surface 31, is separated from the locking ball groove 12 of the working barrel 1 and enters the locking ball unlocking groove 33 of the central rod 3, and therefore the unlocking of the sealing valve core 7 and the working barrel 1 is achieved. With the continuous lifting of the steel wire, due to the action of the stopping step 32 and the annular flange 42, the central rod 3 drives the ball stopping ring 5, the locking ball 6 and the sealing valve core 7 to integrally move upwards through the centering limit sleeve 4, the sealing ring 8 on the sealing valve core 7 loses the sealing with the working barrel 1, and the steel wire is lifted until the central rod 3 drives the ball stopping ring 5, the locking ball 6 and the sealing valve core 7 to come out of the wellhead. At this moment the utility model discloses block up the body and salvage the operation and accomplish, block up in the pit shaft and remove, working barrel 1 and tubular column link to each other and stay in the well, realize the interior tubular column intercommunication of well, carry out oil gas production.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 2, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
in this embodiment, the central rod is not provided with a locking ball unlocking groove, the shearing pin is arranged between the central rod and the centering limiting sleeve to keep the position of the central rod, the central rod can move up and down relative to the sealing valve core after the pin is sheared at the moment, and the locking ball can directly enter the part of the installation cavity below the central rod when the central rod is matched with the centering limiting sleeve in a blocking manner.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 3, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
in the embodiment, the centering and limiting sleeve forms a stopping structure which is matched with the central rod in an axial stopping manner, in the embodiment, the stopping structure is a fixed block fixed at the installation opening of the sealing valve core, and two fixed blocks are arranged and are oppositely arranged in the radial direction of the sealing valve core.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 4, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
in this embodiment, right the stop collar and connect on the chamber wall of installation cavity, right the stop collar and set up the external screw thread this moment, set up the internal thread on the installation cavity wall.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 5, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
in this embodiment, the outer orifice of the lock ball hole is a reduced opening, and a ball blocking ring is not required to be arranged at this time. When the lock ball is installed, the lock ball needs to be installed in the installation cavity. Of course, the locking balls in the above embodiments may be installed into the locking ball holes from the installation cavities.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 6, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
in this embodiment, the ball blocking structure is a ball blocking block, each ball locking hole corresponds to one ball blocking block, the ball blocking blocks are fixed on the sealed valve core through screws, and the ball blocking blocks limit the lock balls to be separated from the ball locking holes from the outer side orifices of the ball locking holes.
In other embodiments, a sliding groove may be formed in the sealing valve core, and after the ball blocking ring or the ball blocking block slides in place, the ball blocking ring or the ball blocking block is fixed by pressing with a jackscrew, and the position of the ball blocking ring or the ball blocking block can be adjusted.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 7, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
the concave cambered surface on the ball retaining ring is replaced by a conical surface.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 8, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
the righting limiting sleeve is fixed through a bolt. In other embodiments, the inner diameter of the centering and limiting sleeve may be smaller than the inner diameter of the retaining ring, and at this time, the centering and limiting sleeve and the retaining ring do not share the external thread on the outer wall surface of the valve core, and at this time, two sections of threads with different radii need to be arranged on the outer wall surface of the valve core to be respectively in threaded fit with the centering and limiting sleeve and the retaining ring.
The utility model discloses can drag for ball accuse blanking plug's concrete embodiment 9, the structure that can drag for ball accuse blanking plug in this embodiment only lies in with the difference in the above-mentioned embodiment:
the ball blocking ring and the righting limiting sleeve are arranged at intervals in the axial direction.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. But drag for ball accuse blanking plug includes:
the working barrel is connected in series in the tubular column oil pipe joint;
the sealing valve core is assembled in the working barrel in a sliding and sealing mode, an installation cavity is formed in the sealing valve core, and an installation opening communicated with the installation cavity is formed in the top of the sealing valve core;
the upper end of the central rod is provided with a fishing head, the lower end of the central rod is inserted into the mounting cavity, and the central rod can move up and down relative to the sealing valve core;
the stopping structure is fixed on the sealing valve core and is used for being matched with the central rod in a stopping way in the axial direction when the central rod is salvaged and lifted, so that the central rod drives the sealing valve core to move upwards;
the automatic locking device is characterized in that a ball locking groove is formed in the inner side of the cylinder wall of the working cylinder, a ball locking hole extending along the radial direction of the sealing valve core is formed in the sealing valve core, and a locking ball used for being locked and matched with the ball locking groove is arranged in the ball locking hole;
the central rod is provided with a lock ball retaining surface for retaining the lock ball in the lock ball groove, and the central rod is provided with a lock ball releasing position in the moving stroke, wherein the lock ball retaining surface and the lock ball are staggered for retracting the lock ball into the mounting cavity.
2. The salvageable ball control plug according to claim 1, wherein the sealing valve core is provided with a ball blocking structure for limiting the locking ball from falling out of the outer hole of the locking ball hole, the position of the ball blocking structure in the axial direction of the sealing valve core is adjustable, and the ball blocking structure has an avoiding position for opening the outer hole of the locking ball hole and a stopping position for cooperating with the ball blocking structure to limit the locking ball from falling out of the locking ball hole.
3. The salvageable ball control plug of claim 2, wherein the ball blocking structure is a ball blocking ring threadedly mounted on the outer wall surface of the seal cartridge, and the axial position of the ball blocking ring is adjusted by screwing the ball blocking ring.
4. The salvageable ball control plug of claim 3, wherein the portion of the ball retaining ring for engaging the lock ball is provided with an inwardly concave surface facing the lock ball for retaining engagement with the lock ball.
5. The salvageable ball control plug according to claim 3, wherein the stopping structure is a centering limit sleeve fixed at one end of the seal spool where the mounting port is formed, an annular flange is arranged on the centering limit sleeve, the center rod penetrates through a centering hole defined by the annular flange, the centering limit sleeve is in stop fit with the center rod in the axial direction through the end face of the annular flange, the centering limit sleeve is in threaded fit with the outer wall surface of the seal spool, and the centering limit sleeve and the ball stopping ring share an external thread on the outer wall surface of the seal spool.
6. The fishing ball control plug of claim 5, wherein the ball retainer ring is in axial retaining engagement with the centering stop collar.
7. The salvageable ball control plug according to any one of claims 1 to 4, wherein the stopping structure is a centering stop sleeve fixed at one end of the sealed valve core provided with the mounting port, an annular flange is arranged on the centering stop sleeve, the central rod passes through a centering hole defined by the annular flange, and the centering stop sleeve is in stop fit with the central rod in the axial direction through the end surface of the annular flange.
8. The salvageable ball control plug of claim 7, wherein the centering sleeve is threadably mounted on the outer wall surface of the seal cartridge.
9. The salvageable ball control plug of any of claims 1 to 6, wherein the center rod is provided with a ball release groove, the ball release groove facing the ball when the center rod is in blocking engagement with the stop structure for retraction of the ball into the mounting cavity.
10. The salvageable ball control plug according to any one of claims 1 to 6, wherein after the center rod is inserted into the bottom of the mounting cavity, the center rod is engaged with the bottom wall of the mounting cavity by gravity to keep the position of the center rod, so that the ball-locking holding surface keeps the locking ball locked with the ball-locking groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022469006.7U CN213980752U (en) | 2020-10-30 | 2020-10-30 | Fishing ball control blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022469006.7U CN213980752U (en) | 2020-10-30 | 2020-10-30 | Fishing ball control blanking plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213980752U true CN213980752U (en) | 2021-08-17 |
Family
ID=77259763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022469006.7U Active CN213980752U (en) | 2020-10-30 | 2020-10-30 | Fishing ball control blanking plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213980752U (en) |
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2020
- 2020-10-30 CN CN202022469006.7U patent/CN213980752U/en active Active
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