CN217712485U - Blowout preventer for tripping pipe string - Google Patents
Blowout preventer for tripping pipe string Download PDFInfo
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- CN217712485U CN217712485U CN202221986952.1U CN202221986952U CN217712485U CN 217712485 U CN217712485 U CN 217712485U CN 202221986952 U CN202221986952 U CN 202221986952U CN 217712485 U CN217712485 U CN 217712485U
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Abstract
The utility model relates to a workover treatment technical field, concretely relates to play tubular column blowout preventer down, including the working barrel of coaxial setting, liquid flow conversion cover, toper seal, go up compression spring, spring adjusting lever and lower compression spring, the working barrel is cavity tubular structure and top and is connected with the tubular column that goes into the well, liquid flow conversion cover cavity tubular structure just is provided with the spacer ring that seals of center fretwork and the liquid board that supplies the fluid to flow respectively in middle part and bottom, the liquid flow conversion cover is embedded in the working barrel and is connected with the working barrel screens, the middle part of spring adjusting lever with the spacing swing joint of liquid board and top with toper sealing body coupling, the inside of toper seal is provided with intercommunication bottom and lateral wall open-ended runner and lateral wall and seals spacer ring sliding seal and is connected, and this device structural design is reasonable, and the difficult problem that produces impurity blocking device can control pressure in the pit betterly, has improved production efficiency.
Description
Technical Field
The utility model relates to a workover technical field, concretely relates to play tubular column blowout preventer down.
Background
The operation of getting off the tubular column is often required to be carried out in the workover operation, because there is well liquid in the pit, the descending speed of tubular column is very fast in the in-process of getting off the operation, well liquid can spout from the oil pipe tubular column of going into the well, consequently, thereby need in time to balance the oil jacket annular space that the oil pipe tubular column of going into the well and sleeve pipe formed and avoid the liquid in the well to take place to return the circumstances such as liquid and then pollute the environment near the well head because of inertial pressure is too big, need a tubular column blowout preventer to balance the pressure in the pit in order to deal with the circumstances of returning the liquid.
The patent with the application number of 201410032828.5 discloses a multifunctional buffer fluid valve for downhole operation, which comprises a working cylinder, wherein the working cylinder is connected with a pressure cap, and a bidirectional fluid flow control device is arranged in the working cylinder; the bidirectional liquid flow control device comprises an inner sleeve and a ball rod, wherein the ball rod is arranged in the inner sleeve, the inner sleeve is provided with a sealing cavity and a liquid flow cavity, and the sealing cavity of the inner sleeve is matched with a ball head of the ball rod; the inner sleeve is a cylindrical body, the middle part of the inner sleeve is a sealing cavity, the two ends of the inner sleeve are liquid flow cavities, the inner diameter of the middle sealing cavity is small, the inner diameter of the liquid flow cavities at the two ends of the inner sleeve is large, a liquid flow groove or a hole is further formed in the shell wall of the liquid flow cavity, and a ball rod is arranged at the bottom of the cylindrical body and penetrates through the central hole and the liquid flow groove or the liquid flow hole; one end of the ball rod is a ball head, the other end of the ball rod is provided with a thread mounting adjusting nut and a back cap, the middle rod body penetrates through the central hole from the ball rod of the inner sleeve, and an upper compression spring and a lower compression spring are mounted on the rod body of the ball rod, the ball rod penetrates through two ends of the central hole, and the ball rod is mounted on the ball rod.
However, this device has the following disadvantages in use:
1. the structure of the lower compression spring and the ball rod is unreasonable, the space formed by the lower compression spring and the ball rod is limited, when the liquid in the well is mud, the viscous mud is easily adhered to the spring and the ball rod, and the spring and the central rod 4 cause the flowing space to be reduced, so that the whole device is easily blocked and loses the function.
2. The inner sleeve 3 in the working barrel is a sphere. The ball has limited function of blocking the central hole, and when liquid in a well contains impurities, the ball is easy to block, so that the whole device is easy to block and lose function; and the increase of the stress area of the spherical surface can cause the liquid pressure to be increased, so that the set pressure of the device can be increased, and the oil sleeve annular space balance pressure is not easy to set.
The above 2 problems can cause the device to lose the well fluid balance buffering function, and the blowout and drilling are formed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tripping pipe column blowout preventer aiming at the defects existing in the prior art.
The technical scheme of the utility model is that:
the utility model provides a play tubular column blowout preventer, includes the working barrel, the fluid flow conversion cover, the toper seal that coaxial set up, goes up compression spring, spring adjusting rod and compression spring down, the working barrel is hollow tubular structure and the top is connected with the tubular column that goes into the well, the fluid flow conversion cover is hollow tubular structure, the fluid flow conversion cover is provided with the seal spacer ring of center fretwork and the liquid board that supplies the fluid to flow through respectively in middle part and bottom, the fluid flow conversion cover is embedded in the working barrel and is connected with the working barrel screens, the middle part of spring adjusting rod with the spacing swing joint of liquid board and top with the toper seal is connected, go up compression spring and lower compression spring cover locate respectively the upper portion and the lower part of spring adjusting rod and all with the liquid board contact is connected, the inside of toper is provided with intercommunication bottom and lateral wall open-ended runner and lateral wall and seal ring sliding seal is connected, when the toper seal receives shaft bottom pressure to drive spring adjusting rod upward movement, the toper side wall opening with the seal of seal removes, the fluid flow of working barrel, conversion cover and toper seal form the fluid flow of accuse pressure seal.
Preferably, the conical sealing body is of a hollow cylindrical structure, a plurality of side wall windows are formed in the side wall, a plurality of liquid penetrating holes are formed in the bottom of the conical sealing body, and the liquid penetrating holes and the side wall windows are matched to form a flow passage.
Preferably, the top of the conical sealing body is provided with a conical top, and the conical top and the packing ring are matched to form a sealing body guide structure.
Preferably, the center of the bottom of the conical sealing body is provided with a connecting hole, and the spring adjusting rod is in threaded connection with the conical sealing body through the connecting hole.
Preferably, the upper end and the lower end of the upper compression spring and the lower end of the lower compression spring are both provided with gaskets, and the top of the upper compression spring is in contact connection with the bottom of the conical sealing body through the gaskets.
Preferably, the bottom of the spring adjusting rod is provided with a compression circular plate, the compression circular plate is provided with a plurality of hollow holes for overflowing and is connected with the bottom of the spring adjusting rod, and the bottom of the lower compression spring is in contact connection with the compression circular plate through a gasket.
Preferably, the bottom of the compression round plate is provided with an adjusting nut, and the adjusting nut is in threaded connection with the spring adjusting rod.
Preferably, the top of the working barrel is provided with a conversion joint, and the working barrel is connected with a well descending pipe column through the conversion joint.
Compared with the prior art, the utility model, have following advantage:
this device structural design is reasonable, is difficult for producing the problem of impurity blocking device, can control pressure in the pit betterly, balances well-flushing liquid and pressure in the pit to avoid taking place the circumstances such as liquid etc. of returning at the in-process of workover, improved operating personnel's operating condition, improved production efficiency, eliminate the vexation mood of worker in the work, accomplish safety in production. And simultaneously meets the requirements of positive and negative well flushing.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of a conical seal structure;
in the figure: 1-a conversion joint, 2-a working barrel, 3-a liquid flow conversion sleeve, 4-a conical sealing body, 5-an upper compression spring, 6-a spring adjusting rod, 7-a lower compression spring, 8-a compression circular plate and 9-an adjusting nut;
31-excluder ring, 32-liquid permeable plate;
41-conical top, 42-side wall window, 43-connecting hole and 44-liquid-permeable hole.
Detailed Description
Embodiments of the invention are illustrated in the drawings and, for the purposes of clarity, numerous implementation details are set forth in the following description. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example one
Referring to fig. 1, a running string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a running string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a sealing ring 31 with a hollow center and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the sealing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 1.0 Mpa +/-0.1 Mpa lower than that of the lower compression spring 7 by 1.5Mpa +/-0.1 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is ensured to be always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic forces to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support, so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the position of the packing ring 31, so as to form a pressure switch structure, the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
This device structural design is reasonable, is difficult for producing the problem of impurity blocking device, can control pressure in the pit betterly, balances well-flushing liquid and pressure in the pit to avoid taking place the circumstances such as liquid etc. of returning at the in-process of workover, improved operating personnel's operating condition, improved production efficiency, eliminate the vexation mood of worker in the work, accomplish safety in production. And simultaneously meets the requirements of positive and negative well flushing.
Example two
Referring to fig. 1 and 2, a tripping pipe string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a tripping pipe string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a hollow center packing ring 31 and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage for communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the packing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 0.8-1.0 Mpa lower than that of the lower compression spring 7 by 1.0-1.5 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic force to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the packing ring 31, so as to form a pressure switch structure, and the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
The conical sealing body 4 is of a hollow cylinder structure, a plurality of side wall windows 42 are formed in the side wall, a plurality of liquid passing holes 44 are formed in the bottom of the conical sealing body 4, the liquid passing holes 44 and the side wall windows 42 are matched to form a flow passing channel, the conical sealing body forms a flow passing channel, and flushing liquid and underground slurry can flow through the flow passing channel conveniently.
EXAMPLE III
Referring to fig. 1 and 2, a tripping pipe string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a tripping pipe string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a hollow center packing ring 31 and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage for communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the packing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 0.8-1.0 Mpa lower than that of the lower compression spring 7 by 1.0-1.5 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic force to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the packing ring 31, so as to form a pressure switch structure, and the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
The conical sealing body 4 is of a hollow cylindrical structure, a plurality of side wall windows 42 are formed in the side wall, a plurality of liquid passing holes 44 are formed in the bottom of the conical sealing body 4, and the liquid passing holes 44 and the side wall windows 42 are matched to form a flow passage.
The top of the conical sealing body 4 is provided with a conical top 41, the conical top 41 and the packing ring 31 are matched to form a sealing body guiding structure, and the packing ring and the conical sealing body are of a sealing structure, so that the conical sealing body needs to be guided in order to avoid being clamped at the packing ring.
Example four
Referring to fig. 1 and 2, a tripping pipe string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a tripping pipe string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a hollow center packing ring 31 and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage for communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the packing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 0.8-1.0 Mpa lower than that of the lower compression spring 7 by 1.0-1.5 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic force to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the packing ring 31, so as to form a pressure switch structure, and the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
The conical sealing body 4 is of a hollow cylindrical structure, a plurality of side wall windows 42 are formed in the side wall, a plurality of liquid passing holes 44 are formed in the bottom of the conical sealing body 4, and the liquid passing holes 44 and the side wall windows 42 are matched to form a flow passage.
The top of the conical sealing body 4 is provided with a conical top 41, and the conical top 41 and the packing ring 31 are matched to form a sealing body guide structure. The bottom center of the conical sealing body 4 is provided with a connecting hole 43, the spring adjusting rod 6 is in threaded connection with the conical sealing body 4 through the connecting hole 43, the threaded connection mode of the connecting hole 43 is more convenient for installation and disassembly of the device, and later maintenance and maintenance are facilitated.
EXAMPLE five
Referring to fig. 1 and 2, a tripping pipe string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a tripping pipe string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a hollow center packing ring 31 and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage for communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the packing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 0.8-1.0 Mpa lower than that of the lower compression spring 7 by 1.0-1.5 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic force to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the packing ring 31, so as to form a pressure switch structure, and the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
The conical sealing body 4 is of a hollow cylindrical structure, a plurality of side wall windows 42 are formed in the side wall, a plurality of liquid passing holes 44 are formed in the bottom of the conical sealing body 4, and the liquid passing holes 44 and the side wall windows 42 are matched to form a flow passage. The top of the conical sealing body 4 is provided with a conical top 41, and the conical top 41 and the packing ring 31 are matched to form a sealing body guide structure.
The center of the bottom of the conical sealing body 4 is provided with a connecting hole 43, and the spring adjusting rod 6 is in threaded connection with the conical sealing body 4 through the connecting hole 43. Go up compression spring 5 and compression spring 7's upper and lower both ends and all be provided with the gasket, go up compression spring 5's top and pass through the gasket and be connected with the bottom contact of cone seal body 4, the purpose that sets up the gasket is in order to protect and cushion the junction, avoids taking place wearing and tearing and corruption.
EXAMPLE six
Referring to fig. 1 and 2, a tripping pipe string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a tripping pipe string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a hollow center packing ring 31 and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage for communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the packing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 0.8-1.0 Mpa lower than that of the lower compression spring 7 by 1.0-1.5 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic force to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the packing ring 31, so as to form a pressure switch structure, and the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
The conical sealing body 4 is of a hollow cylindrical structure, a plurality of side wall windows 42 are formed in the side wall, a plurality of liquid passing holes 44 are formed in the bottom of the conical sealing body 4, and the liquid passing holes 44 and the side wall windows 42 are matched to form a flow passage. The top of the conical sealing body 4 is provided with a conical top 41, and the conical top 41 and the packing ring 31 are matched to form a sealing body guide structure.
The center of the bottom of the conical sealing body 4 is provided with a connecting hole 43, and the spring adjusting rod 6 is in threaded connection with the conical sealing body 4 through the connecting hole 43. Go up compression spring 5 and lower compression spring 7's upper and lower both ends and all be provided with the gasket, go up compression spring 5's top and pass through the gasket and be connected with the bottom contact of toper seal 4.
The bottom of spring adjusting rod 6 is provided with compression plectane 8, and compression plectane 8 is provided with a plurality of fretwork holes that overflow and is connected with the bottom of spring adjusting rod 6, and the bottom of compression spring 7 passes through the gasket and is connected with compression plectane 8 contact down.
EXAMPLE seven
Referring to fig. 1 and 2, a tripping pipe string blowout preventer comprises a working barrel 2, a fluid conversion sleeve 3, a conical sealing body 4, an upper compression spring 5, a spring adjusting rod 6, a lower compression spring 7 and a compression circular plate 8 which are coaxially arranged, wherein the working barrel 2 is of a hollow tubular structure, the top of the working barrel is connected with a tripping pipe string, the fluid conversion sleeve 3 is embedded in the working barrel 2 and is connected with the working barrel 2 in a clamping manner, the fluid conversion sleeve 3 is of a hollow tubular structure, a hollow center packing ring 31 and a fluid-permeable plate 32 for fluid to flow through are respectively arranged in the middle and at the bottom of the fluid conversion sleeve 3, the middle of the spring adjusting rod 6 is movably connected with the fluid-permeable plate 32 in a limiting manner, the top and at the bottom of the spring adjusting rod are respectively connected with the conical sealing body 4 and the compression circular plate 8, a flow passage for communicating the bottom and side wall openings is arranged in the conical sealing body 4 and is connected with the packing ring 31 in a limiting and sliding manner, the compression circular plate 8 is provided with a plurality of hollowed holes for liquid to flow through and is connected with the bottom of the spring adjusting rod 6, the upper compression spring 5 and the lower compression spring 7 are respectively sleeved on the upper part and the lower part of the spring adjusting rod 6 and are both in contact connection with the liquid-permeable plate 32, the contraction pressure of the upper compression spring 5 is set to be 0.8-1.0 Mpa lower than that of the lower compression spring 7 by 1.0-1.5 Mpa, so that the underground pressure can be better balanced, the pressure in the oil pipe is always lower than the annular pressure of the oil sleeve, the phenomenon of liquid return of the oil pipe can not occur, the upper compression spring 5 and the lower compression spring 7 respectively apply upward and downward elastic force to the spring adjusting rod 6 by taking the liquid-permeable plate 32 as a support so as to balance the stress of the spring adjusting rod 6, the conical sealing body 4 is limited at the packing ring 31, so as to form a pressure switch structure, and the elastic force of the lower compression spring 7 can be adjusted by adjusting the height position of the compression circular plate 8, thereby accommodating downhole pressure conditions.
The conical sealing body 4 is of a hollow cylindrical structure, a plurality of side wall windows 42 are formed in the side wall, a plurality of liquid penetrating holes 44 are formed in the bottom of the conical sealing body 4, and the liquid penetrating holes 44 and the side wall windows 42 are matched to form a flow passage. The top of the conical sealing body 4 is provided with a conical top 41, and the conical top 41 and the packing ring 31 are matched to form a sealing body guide structure.
The center of the bottom of the conical sealing body 4 is provided with a connecting hole 43, and the spring adjusting rod 6 is in threaded connection with the conical sealing body 4 through the connecting hole 43. Go up compression spring 5 and lower compression spring 7's upper and lower both ends and all be provided with the gasket, go up compression spring 5's top and pass through the gasket and be connected with the bottom contact of toper seal 4.
The bottom of spring adjusting rod 6 is provided with compression plectane 8, and compression plectane 8 is provided with a plurality of fretwork holes that overflow and is connected with the bottom of spring adjusting rod 6, and the bottom of compression spring 7 passes through the gasket and is connected with compression plectane 8 contact down. The bottom of the compression round plate 8 is provided with an adjusting nut 9, and the adjusting nut 9 is in threaded connection with the spring adjusting rod 6. The elasticity of the upper compression spring can be adjusted by rotating the adjusting nut, so that the underground environment with different pressures can be better adapted. The top of the working barrel 2 is provided with a conversion joint 1, and the working barrel 2 is connected with a well-descending pipe column through the conversion joint 1.
The specific working process is as follows:
this device is along with going into the well under the tubular column of going into the well, the pressure of 2 of in-process working barrel that descend risees gradually, the toper seal 4 can realize sealing and the action of opening the liquid flow way under last compression spring 5 and compression spring 7's regulation down, thereby there is the messenger's well liquid entering oil pipe inner chamber of control, the contraction pressure of going up compression spring 5 sets up to 1.0 Mpa 0.1 Mpa and is less than the contraction pressure 1.5Mpa 0.1 Mpa of compression spring 7 down, guarantee that oil pipe internal pressure is less than oil jacket annular pressure all the time, the phenomenon of liquid is returned can not appear in the oil pipe, unnecessary liquid is discharged from the sleeve pipe in the pit shaft. When the pressure difference between the oil sleeve annulus and the inner cavity of the oil pipe reaches the designed value, the lower compression spring 7 is compressed, the conical sealing body 4 moves upwards and leaks out of the side wall window 42, and the liquid flow channel of the conical sealing body 4 is opened. The liquid below the device enters the oil pipe on the upper part through the liquid flow conversion sleeve 3, the effect of balancing the pressure of the oil pipe and the sleeve is achieved, the liquid level in the oil pipe is controlled to be slightly lower than the liquid level in the sleeve, and after the device is lowered to the designed depth, forward well washing and reverse well washing can be freely selected according to different construction requirements.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a play tubular column blowout preventer, includes the working barrel, the fluid flow conversion cover, the toper seal that coaxial set up, goes up compression spring, spring adjusting lever and compression spring down, its characterized in that, the working barrel is hollow tubular structure and the top is connected with the tubular column of going into the well, the fluid flow conversion cover is hollow tubular structure, the fluid flow conversion cover is provided with the spacer ring of center fretwork and the liquid-permeable plate that supplies the fluid to flow respectively in middle part and bottom, the fluid flow conversion cover is embedded in the working barrel and with the working barrel screens connection, the middle part of spring adjusting lever with the spacing swing joint of liquid-permeable plate and top with the toper seal is connected, go up compression spring and compression spring down overlap respectively locate the upper portion and the lower part of spring adjusting lever and all with the liquid-permeable plate contact is connected, the inside of toper seal is provided with intercommunication bottom and lateral wall open-ended runner and lateral wall and the lateral wall and seals spacer ring sliding seal and is connected, works the conical side of working barrel, and the fluid flow conversion cover and the conical seal that the conical seal formed the fluid flow seal up-adjustable seal.
2. The tripping pipe string blowout preventer of claim 1, wherein: the tapered sealing body is of a hollow cylinder structure, a plurality of side wall windows are formed in the side wall, a plurality of liquid penetrating holes are formed in the bottom of the tapered sealing body, and the liquid penetrating holes and the side wall windows are matched to form an overflowing channel.
3. A tripping pipe string blowout preventer according to claim 2, wherein: the top of toper seal is provided with the toper top, the toper top with seal and separate the ring cooperation and constitute seal guide structure.
4. A tripping pipe string blowout preventer according to claim 2, wherein: the bottom center of the conical sealing body is provided with a connecting hole, and the spring adjusting rod is connected with the conical sealing body through the connecting hole in a threaded manner.
5. The tripping pipe string blowout preventer of claim 4, wherein: the upper end and the lower end of the upper compression spring and the lower end of the lower compression spring are both provided with gaskets, and the top of the upper compression spring is in contact connection with the bottom of the conical sealing body through the gaskets.
6. The tripping pipe string blowout preventer of claim 5, wherein: the bottom of the spring adjusting rod is provided with a compression circular plate, the compression circular plate is provided with a plurality of hollow holes for overflowing and is connected with the bottom of the spring adjusting rod, and the bottom of the lower compression spring is in contact connection with the compression circular plate through a gasket.
7. The tripping pipe string blowout preventer of claim 6, wherein: and an adjusting nut is arranged at the bottom of the compression circular plate and is in threaded connection with the spring adjusting rod.
8. A tripping pipe string blowout preventer according to claim 1, wherein: the top of the working barrel is provided with a crossover sub, and the working barrel is connected with a well-descending pipe column through the crossover sub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221986952.1U CN217712485U (en) | 2022-07-29 | 2022-07-29 | Blowout preventer for tripping pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221986952.1U CN217712485U (en) | 2022-07-29 | 2022-07-29 | Blowout preventer for tripping pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217712485U true CN217712485U (en) | 2022-11-01 |
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ID=83782121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221986952.1U Active CN217712485U (en) | 2022-07-29 | 2022-07-29 | Blowout preventer for tripping pipe string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217712485U (en) |
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2022
- 2022-07-29 CN CN202221986952.1U patent/CN217712485U/en active Active
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