CN116066007B - Cement head sealing device and sealing method - Google Patents
Cement head sealing device and sealing method Download PDFInfo
- Publication number
- CN116066007B CN116066007B CN202211394051.8A CN202211394051A CN116066007B CN 116066007 B CN116066007 B CN 116066007B CN 202211394051 A CN202211394051 A CN 202211394051A CN 116066007 B CN116066007 B CN 116066007B
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- joint
- locking
- locking sleeve
- sealing
- sleeve
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- 238000007789 sealing Methods 0.000 title claims abstract description 105
- 239000004568 cement Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000903 blocking effect Effects 0.000 claims description 42
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/05—Cementing-heads, e.g. having provision for introducing cementing plugs
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model belongs to the technical field of oilfield cementing, and discloses a cement head sealing device and a sealing method. The cement head sealing device comprises a joint, a locking sleeve, a sealing assembly and a locking assembly; the joint is arranged at the bottom of the cement head; the locking sleeve is in threaded connection with the joint, an avoidance gap is formed in the side wall of the locking sleeve, the avoidance gap extends downwards to the bottom end face of the locking sleeve, and the width of the avoidance gap is larger than the outer diameter of the joint; the top joint is arranged in the locking sleeve, the lower part of the inner wall of the locking sleeve is provided with a circumferential bearing table, and the top bulge of the top joint is abutted against the upper surface of the bearing table; the sealing component is arranged between the joint and the joint; the two ends of the locking component are detachably fixed on the locking sleeves at two sides of the avoidance gap respectively, and the locking component is abutted against the side wall of the joint. The cement head sealing device can rapidly complete the installation of the locking sleeve, realizes the connection and sealing of the cement head and the joint, and is safe, reliable and high in axial sealing capability.
Description
Technical Field
The utility model relates to the technical field of oilfield cementing, in particular to a cement head sealing device and a sealing method.
Background
The wellhead device for well cementation is mainly a well cementation cement head, and cement is injected from the cement head through connection of the cement head and a joint below, so that cement paste injection and replacement operation is realized. The nipple joint is usually required to be arranged between the cement head and the joint so as to better realize connection and sealing, and the nipple joint, the cement head and the joint are connected by adopting a sleeve buckle, the sleeve buckle is complex in operation, time-consuming and labor-consuming, and extremely fragile after being used for a plurality of times, so that the sealing pressure of the cement head is directly influenced, and the safety problems of liquid puncture leakage, even wellhead collapse of the cement head and the like are easily caused.
The existing cement head sealing device is as provided in the patent of application number 201821390834.8, a cement head quick-mounting joint is arranged at the lower end of a cement head, a coupling at the top of a joint is tightly propped against the bottom of the cement head quick-mounting joint, and then a locking sleeve penetrates through the joint from bottom to top and is in threaded connection with the cement head quick-mounting joint, so that the joint below the locking sleeve is connected with the cement head and keeps sealing, but the problem of inconvenient installation and detachment of the locking sleeve exists in the wellhead connection sealing device, and construction and maintenance efficiency are greatly influenced.
Disclosure of Invention
The utility model aims to provide a cement head sealing device which can be connected between a cement head and a joint, and is safe, reliable and high in axial sealing capability.
To achieve the purpose, the utility model adopts the following technical scheme:
cement head sealing device includes:
the joint is arranged at the bottom of the cement head;
the locking sleeve is in threaded connection with the connector, a clearance gap is formed in the side wall of the locking sleeve, the clearance gap extends downwards to the bottom end face of the locking sleeve, and the width of the clearance gap is larger than the outer diameter of the joint; the top joint is arranged in the locking sleeve, a circumferential bearing table is arranged at the lower part of the inner wall of the locking sleeve, and the top bulge of the top joint is abutted to the upper surface of the bearing table;
a seal assembly disposed between the fitting and the landing joint;
the locking assembly is detachably fixed on the locking sleeves at two sides of the avoidance notch respectively, and the locking assembly is abutted to the side wall of the joint.
Preferably, the locking assembly comprises a locking piece, a pin shaft and a blocking piece, two locking platforms are arranged on the locking sleeve, the two locking platforms are respectively arranged on the side walls at two sides of the avoidance gap, two ends of the locking piece are respectively and movably connected with the two locking platforms through the two pin shafts, the blocking piece is arranged on the pin shaft in a penetrating manner, and the blocking piece is used for enabling the pin shaft to be fixed on the locking platforms; the inner side wall of the locking piece is an arc surface and is abutted to the joint, an avoidance groove is formed in the upper surface of the locking piece, and the bottom surface of the avoidance groove and the upper surface of the bearing table are located on the same axial plane.
Preferably, the side surfaces of the two locking platforms are provided with mounting grooves, and two ends of the locking piece are respectively arranged in the two mounting grooves and are movably connected with the locking platforms through two pin shafts; the pin shaft is provided with a first through hole, the blocking piece is arranged in the first through hole in a penetrating mode, and the part, extending out of the first through hole, of the blocking piece abuts against the upper surface of the locking platform.
Preferably, two ends of the locking piece are respectively arranged below the two locking platforms and are movably connected with the two locking platforms through two pin shafts; the pin shaft is provided with a first through hole and a second through hole along the length direction, the blocking piece comprises a first blocking piece and a second blocking piece, the first blocking piece penetrates through the first through hole, the first blocking piece stretches out of the first through hole and is attached to the upper surface of the locking platform, the second blocking piece penetrates through the second through hole, and the second blocking piece stretches out of the second through hole and is attached to the lower surface of the locking platform.
Preferably, the inner wall of the joint is provided with a first circumferential protrusion, the sealing assembly comprises a mounting ring and a first sealing element, the mounting ring is propped against the first protrusion along the axial direction, the upper part of the outer side wall of the mounting ring is propped against the inner wall of the joint, a first annular groove is formed between the inner wall of the joint and the lower part of the outer side wall of the mounting ring, the first sealing element is clamped in the first annular groove, the top surface of the first sealing element is propped against the groove body of the first annular groove, the inner side wall of the first sealing element is propped against the side wall of the first annular groove, the outer side wall of the first sealing element is propped against the inner wall of the joint, and the upper end surface of the joint is propped against the bottom surface of the first sealing element.
Preferably, the first seal has a height in the vertical direction not greater than the depth of the first annular groove.
Preferably, the sealing assembly further comprises a second sealing element, a second annular groove is formed in the upper portion of the outer side wall of the mounting ring, the second sealing element is clamped in the second annular groove, the inner side wall of the second sealing element is abutted to the groove bottom of the second annular groove, and the outer side wall of the second sealing element is abutted to the inner wall of the joint.
Preferably, a plurality of impact members are circumferentially arranged on the outer wall of the locking sleeve.
Preferably, the striker is a rectangular block.
The utility model further aims to provide a cement head sealing method which can be used for rapidly installing the locking sleeve and the joint so as to realize connection and sealing of the cement head and the joint.
To achieve the purpose, the utility model adopts the following technical scheme:
the cement head sealing method, which uses the cement head sealing device, comprises the following steps:
s1, connecting the joint with the cement head, arranging the sealing assembly at one end of the joint, which is connected with the joint, sleeving the joint into the locking sleeve, screwing the locking sleeve positively, and connecting the joint with the locking sleeve;
s2, opening the locking assembly, and pushing the locking sleeve from the side face of the joint so that the joint enters the locking sleeve through the avoidance notch;
s3, closing the locking assembly, forward screwing the locking sleeve to enable the end face of the joint to be abutted to the sealing assembly, and continuing forward screwing the locking sleeve until the locking sleeve is fastened with the joint.
The utility model has the beneficial effects that:
according to the cement head sealing device provided by the utility model, the avoidance notch is formed in the side wall of the locking sleeve, the avoidance notch extends downwards to the bottom end surface of the locking sleeve and the width of the avoidance notch is larger than the outer diameter of the joint, so that the locking sleeve can be pushed to enable the joint to enter the locking sleeve through the avoidance notch, the circumferential bearing table is arranged at the lower part of the inner wall of the locking sleeve, the joint can be fixed in the locking sleeve, the locking sleeve does not need to be sleeved upwards from the lower part of the joint, and the installation can be completed, and the cement head sealing device is convenient to operate and saves time and labor; the joint is arranged, so that the cooperation of the cement head and the locking sleeve can be better realized, the top of the joint is connected with the cement head, the bottom of the joint is in threaded connection with the locking sleeve, and the joint is fixed in the locking sleeve, so that the joint and the joint are connected and fastened through the locking sleeve, the sealing component is arranged at the joint of the joint and the joint, the locking sleeve can be moved upwards by screwing, and the joint is driven to move upwards through the bearing table so as to tightly seal the component, so that the sealing between the joint and the joint is realized; the locking assembly is detachably fixed on the locking sleeves at the two sides of the avoidance notch respectively, and the locking assembly is abutted to the side wall of the joint, so that the joint is limited in the locking sleeve, the joint is prevented from falling out of the avoidance notch, and the safety of the device is improved.
By using the cement head sealing method, the joint is arranged to realize the matching of the cement head and the locking sleeve, the locking sleeve and the joint can be installed in a side pushing mode, the locking sleeve does not need to be sleeved upwards from the bottom of the joint in a laborious manner, the connection and the sealing of the cement head and the joint can be rapidly completed, the labor is greatly saved, the connection is stable and reliable, and the installation efficiency is improved.
Drawings
FIG. 1 is a schematic view of a cementing head seal apparatus according to an embodiment of the present utility model;
FIG. 2 is a front view of a locking sleeve provided in accordance with an embodiment of the present utility model;
FIG. 3 is a side view of a locking sleeve provided in accordance with an embodiment of the present utility model;
FIG. 4 is a schematic view of a mounting ring according to an embodiment of the present utility model;
fig. 5 is a schematic structural view of a locking member according to an embodiment of the present utility model.
In the figure:
1-a locking sleeve; 11-avoiding the notch; 12-a bearing table; 13-locking the platform; 131-mounting slots; 15-strike;
2-a seal assembly; 21-a mounting ring; 211-a first annular groove; 212-a second annular groove; 22-a first seal; 23-a second seal;
3-locking the assembly; 31-locking member; 311-avoiding grooves;
4-linker; 41-first protrusions.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1 to 5, the present utility model provides a cement head sealing device, which comprises a joint 4, a locking sleeve 1, a sealing component 2 and a locking component 3, wherein the joint 4 is arranged at the bottom of the cement head; the locking sleeve 1 is in threaded connection with the joint 4, an avoidance notch 11 is formed in the side wall of the locking sleeve 1, the avoidance notch 11 extends downwards to the bottom end surface of the locking sleeve 1, and the width of the avoidance notch 11 is larger than the outer diameter of the joint; the joint is arranged in the locking sleeve 1, the lower part of the inner wall of the locking sleeve 1 is provided with a circumferential bearing table 12, the top bulge of the joint is abutted against the upper surface of the bearing table 12, the top of the joint commonly used in the field of oilfield well cementation at present is provided with a coupling, and the coupling is cylindrical and has an outer diameter larger than that of the joint, so that the bottom of the coupling can be placed on the bearing table 12, and the bearing table 12 can drive the joint to prop up against the joint 4; because the side wall of the locking sleeve 1 is provided with the avoidance notch 11, the avoidance notch 11 extends downwards to the bottom end surface of the locking sleeve 1, and the width of the avoidance notch 11 is larger than the outer diameter of the joint, the locking sleeve 1 can be pushed to enable the joint to enter the locking sleeve 1 through the avoidance notch 11, the lower part of the inner wall of the locking sleeve 1 is provided with the circumferential bearing table 12, the joint can be fixed in the locking sleeve 1, the locking sleeve 1 can be sleeved upwards from the lower part of the joint in a laborious manner, and the locking sleeve is convenient to operate, time-saving and labor-saving; through setting up joint 4, can realize the cooperation of cement head and lock sleeve 1 better, the top and the cement head that connect 4 are connected, the bottom and the lock sleeve 1 threaded connection that connect 4, the joint is fixed in lock sleeve 1 to the connection and the fastening of joint 4 and joint have been realized through lock sleeve 1.
The sealing assembly 2 is arranged between the joint 4 and the joint; the joint 4 is provided with sealing component 2 with the junction of joint, twists lock sleeve 1 and can make lock sleeve 1 upwards remove, thereby drives joint through bearing platform 12 and upwards removes in order to top closely seal component 2 and realize the sealing between joint 4 and the joint.
Both ends of the locking component 3 are detachably fixed on the locking sleeve 1 at both sides of the avoidance gap 11 respectively, and the locking component 3 is abutted against the side wall of the joint. Two ends of the locking assembly 3 are respectively and detachably fixed on the locking sleeves 1 at two sides of the avoidance notch 11, the locking sleeve 1 can be taken out or installed by taking down the locking assembly 3, and the joint can be fixed in the locking sleeve 1 by installing the locking assembly 3; the locking assembly 3 is abutted against the side wall of the joint, so that the joint is limited in the locking sleeve 1, the joint is prevented from falling out of the avoidance notch 11, and the safety of the device is improved.
Further, the locking assembly 3 comprises a locking piece 31, a pin shaft and a blocking piece, two locking platforms 13 are arranged on the locking sleeve 1, the two locking platforms 13 are respectively arranged on the side walls at two sides of the avoidance gap 11, two ends of the locking piece 31 are respectively and movably connected with the two locking platforms 13 through the two pin shafts, the blocking piece is arranged on the pin shaft in a penetrating mode, and the blocking piece is used for enabling the pin shaft to be fixed on the locking platforms 13; the inner side wall of the locking piece 31 is an arc surface and is abutted against the joint, the upper surface of the locking piece 31 is provided with an avoidance groove 311, and the bottom surface of the avoidance groove 311 and the upper surface of the bearing table 12 are positioned on the same axial plane. In this embodiment, the locking platforms 13 are disposed on the bottom end surface of the locking sleeve 1 and are located at two sides of the avoidance notch 11, the locking member 31 encloses the avoidance groove 311 from the bottom of the avoidance groove 311, so that accidental release of the joint from the locking sleeve 1 can be prevented, holes matched with the outer diameter of the pin shaft are formed in two ends of the locking member 31, holes matched with the holes are also formed in the locking platforms 13, and therefore two ends of the locking member 31 are movably connected with the two locking platforms 13 through the pin shaft; the inner side wall of the locking piece 31 is an arc-shaped surface, so that the locking piece can better be abutted against the outer diameter of the joint, and the fastening effect of the locking piece 31 on the joint is enhanced; the inner side of the upper surface of the locking piece 31 is provided with a right-angle avoiding groove 311, the groove bottom surface of the avoiding groove 311 and the upper surface of the bearing table 12 are positioned on the same axial plane, and the lower surface of the coupling of the joint can be clamped on the groove bottom surface of the avoiding groove 311, so that the joint is installed more firmly. When the locking sleeve 1 is required to be installed or disassembled, the blocking piece and the pin shaft at one side of the locking piece 31 are removed, and the locking piece 31 is rotated to be opened, so that the locking sleeve 1 is pushed to enable the joint to enter the locking sleeve 1; when the installation is completed, the locking member 31 is closed and the pin shaft and the catch member are inserted, thereby locking the header joint in the lock sleeve 1.
Specifically, the side surfaces of the two locking platforms 13 are provided with mounting grooves 131, and two ends of the locking piece 31 are respectively arranged in the two mounting grooves 131 and are movably connected with the locking platforms 13 through two pin shafts; the pin shaft is provided with a first through hole, the blocking piece is arranged in the first through hole in a penetrating mode, and the part, extending out of the first through hole, of the blocking piece abuts against the upper surface of the locking platform 13. In this embodiment, the two locking platforms 13 have a certain thickness, the sides of the two locking platforms 13 are provided with mounting grooves 131, two ends of the locking member 31 are respectively inserted into the mounting grooves 131, then the pin shaft sequentially passes through the locking platforms 13 and the drilling holes at two ends of the locking member 31, and the blocking member passes through the first through hole of the pin shaft, so that the position of the pin shaft relative to the locking platform 13 is fixed, and the locking member 31 is fixed on the locking platform 13.
Specifically, two ends of the locking piece 31 are respectively arranged below the two locking platforms 13 and are movably connected with the two locking platforms 13 through two pin shafts; the pin shaft is provided with a first through hole and a second through hole along the length direction, the blocking piece comprises a first blocking piece and a second blocking piece, the first blocking piece is arranged in the first through hole in a penetrating mode, the part, extending out of the first through hole, of the first blocking piece is abutted to the upper surface of the locking platform 13, and the second blocking piece is arranged in the second through hole in a penetrating mode, and the part, extending out of the second through hole, of the second blocking piece is abutted to the lower surface of the locking platform 13. In this embodiment, two ends of the locking member 31 are respectively disposed below the locking platforms 13 at two sides, and the drilling holes of the locking member 31 and the locking platform 13 are aligned, then the pin shaft sequentially passes through the locking platform 13 and the locking member 31, the first blocking member passes through the first through hole, and the second blocking member passes through the second through hole, so that the pin shaft is fixed relative to the locking platform 13, and the locking member 31 is fixed on the locking platform 13.
Further, the inner wall of the joint 4 is provided with a first protrusion 41 in the circumferential direction, the sealing assembly 2 comprises a mounting ring 21 and a first sealing member 22, the mounting ring 21 is abutted against the first protrusion 41 in the axial direction, the upper portion of the outer side wall of the mounting ring 21 is abutted against the inner wall of the joint 4, a first annular groove 211 is formed between the inner wall of the joint 4 and the lower portion of the outer side wall of the mounting ring 21, the first sealing member 22 is clamped in the first annular groove 211, the top surface of the first sealing member 22 is abutted against the groove body of the first annular groove 211, the inner side wall of the first sealing member 22 is abutted against the side wall of the first annular groove 211, the outer side wall of the first sealing member 22 is abutted against the inner wall of the joint 4, and the upper end surface of the joint top section is abutted against the bottom surface of the first sealing member 22. In this embodiment, the mounting ring 21 is made of steel, the mounting ring 21 abuts against the lower end face of the first protrusion 41, a first annular groove 211 is formed between the lower part of the outer side wall of the mounting ring 21 and the inner wall of the joint 4, the first sealing member 22 is a sealing ring made of rubber, and the first sealing member 22 is arranged in the first annular groove 211 and closely abuts against each face of the first annular groove 211; the upper end surface of the header is closely abutted against the bottom surface of the first seal member 22, thereby achieving the sealing effect and preventing leakage of high-pressure liquid.
Specifically, the height of the first seal 22 in the vertical direction is not greater than the depth of the first annular groove 211. In this embodiment, the height of the first sealing member 22 in the vertical direction is smaller than the depth of the first annular groove 211, so that the upper end surface of the header joint can be clamped into the first annular groove 211, thereby better realizing the installation and positioning of the header joint and enabling the header joint to be more stable in the fastening process.
Further, the sealing assembly 2 further comprises a second sealing element 23, the upper portion of the outer side wall of the mounting ring 21 is provided with a second annular groove 212, the second sealing element 23 is clamped in the second annular groove 212, the inner side wall of the second sealing element 23 is abutted against the groove bottom of the second annular groove 212, and the outer side wall of the second sealing element 23 is abutted against the inner wall of the joint 4. In this embodiment, the second sealing member 23 and the first sealing member 22 are made of the same material, so that the second sealing member 23 adopts an O-ring to achieve a better sealing effect, and the first sealing member 22 and the second sealing member 23 can achieve a dual sealing effect, thereby improving the safety of the construction process.
Further, a plurality of striking members 15 are circumferentially provided on the outer wall of the lock sleeve 1. In this embodiment, when tightening the locking sleeve 1, the constructor can hammer the striking member 15 by means of a hammer or the like, so that the locking sleeve 1 and the joint 4 are completely fastened.
Specifically, the striker 15 is a rectangular block. In this embodiment, the striking member 15 is a rectangular steel block, and its side is a plane, so that the stress surface is increased, and the striking member is convenient for a constructor to hammer.
The embodiment also comprises a cement head sealing method, and the cement head sealing device comprises the following steps:
s1, connecting a joint 4 with a cement head, arranging a sealing assembly 2 at one end of the joint 4, which is connected with a joint, sleeving the joint 4 into a locking sleeve 1, screwing the locking sleeve 1 forward, and connecting the joint 4 with the locking sleeve 1. Specifically, the first seal member 22 and the second seal member 23 are fitted with the mounting ring 21 and fitted together on the first projection 41 of the joint 4, and then the joint 4 is screwed with the lock sleeve 1.
S2, opening the locking assembly 3, pushing the locking sleeve 1 from the side face of the joint so that the joint enters the locking sleeve 1 through the avoiding notch 11. Specifically, the blocking piece and the pin shaft on one side of the locking piece 31 are removed, the locking piece 31 is rotated to be opened, the avoidance notch 11 of the locking sleeve 1 is aligned with the joint, the locking sleeve 1 is pushed to move to the side surface of the joint so that the joint enters the locking sleeve 1 through the avoidance notch 11, and meanwhile, the lower edge of the joint coupling is abutted against the upper surface of the supporting table 12 during position adjustment, so that the installation of the locking sleeve 1 is completed.
S3, closing the locking assembly 3, forward screwing the locking sleeve 1 to enable the end face of the joint to be abutted against the sealing assembly 2, and continuing forward screwing the locking sleeve 1 until the locking sleeve 1 is fastened with the joint 4. Specifically, the locking member 31 is closed and the pin shaft and the blocking member are inserted, so that the joint is locked in the locking sleeve 1, and the joint is prevented from being accidentally separated from the side surface of the locking sleeve 1; the locking sleeve 1 is screwed forward, so that the joint coupling on the bearing table 12 is driven to move upwards to tightly prop up the first sealing piece 22 on the mounting ring 21; when the constructor cannot manually screw the locking sleeve 1 forward, the impacting member 15 is hammered from the side by using tools such as a hammer and the like so as to realize complete fastening of the locking sleeve 1 and the joint 4.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. Cement head sealing device, its characterized in that includes:
the joint (4) is arranged at the bottom of the cement head;
the locking sleeve (1), the locking sleeve (1) is in threaded connection with the joint (4), an avoidance notch (11) is formed in the side wall of the locking sleeve (1), the avoidance notch (11) extends downwards to the bottom end surface of the locking sleeve (1), and the width of the avoidance notch (11) is larger than the outer diameter of the joint; the joint is arranged in the locking sleeve (1), a circumferential bearing table (12) is arranged at the lower part of the inner wall of the locking sleeve (1), and the top bulge of the joint is abutted to the upper surface of the bearing table (12);
-a sealing assembly (2), said sealing assembly (2) being arranged between said joint (4) and said landing joint;
the locking assembly (3), both ends of locking assembly (3) are detachably fixed respectively dodge on lock sleeve (1) of breach (11) both sides, locking assembly (3) with the lateral wall of joint is leaned on.
2. The cementing head sealing device according to claim 1, wherein the locking assembly (3) comprises a locking piece (31), a pin shaft and a blocking piece, two locking platforms (13) are arranged on the locking sleeve (1), the two locking platforms (13) are respectively arranged on the side walls at two sides of the avoidance gap (11), two ends of the locking piece (31) are respectively and movably connected with the two locking platforms (13) through the two pin shafts, the blocking piece is arranged on the pin shaft in a penetrating manner, and the blocking piece is used for enabling the pin shaft to be fixed on the locking platforms (13); the inner side wall of the locking piece (31) is an arc surface and is attached to the joint, an avoidance groove (311) is formed in the upper surface of the locking piece (31), and the bottom surface of the avoidance groove (311) and the upper surface of the bearing table (12) are located on the same axial plane.
3. The cementing head sealing device according to claim 2, wherein the side surfaces of the two locking platforms (13) are provided with mounting grooves (131), and two ends of the locking piece (31) are respectively arranged in the two mounting grooves (131) and are movably connected with the locking platforms (13) through two pin shafts; the pin shaft is provided with a first through hole, the blocking piece is arranged in the first through hole in a penetrating mode, and the part, extending out of the first through hole, of the blocking piece abuts against the upper surface of the locking platform (13).
4. Cement head sealing device according to claim 2, characterized in that the two ends of the locking element (31) are respectively arranged below the two locking platforms (13) and are movably connected with the two locking platforms (13) through the two pin shafts; the pin shaft is provided with a first through hole and a second through hole along the length direction, the blocking piece comprises a first blocking piece and a second blocking piece, the first blocking piece penetrates through the first through hole, the first blocking piece stretches out of the first through hole and is attached to the upper surface of the locking platform (13), the second blocking piece penetrates through the second through hole, and the second blocking piece stretches out of the second through hole and is attached to the lower surface of the locking platform (13).
5. Cement head sealing device according to claim 1, characterized in that the inner wall of the joint (4) is provided with a circumferential first bulge (41), the sealing assembly (2) comprises a mounting ring (21) and a first sealing element (22), the mounting ring (21) is abutted against the first bulge (41) along the axial direction, the upper part of the outer side wall of the mounting ring (21) is abutted against the inner wall of the joint (4), a first annular groove (211) is formed between the inner wall of the joint (4) and the lower part of the outer side wall of the mounting ring (21), the first sealing element (22) is clamped in the first annular groove (211), the top surface of the first sealing element (22) is abutted against the groove body of the first annular groove (211), the inner side wall of the first sealing element (22) is abutted against the side wall of the first annular groove (211), and the outer side wall of the first sealing element (22) is abutted against the inner wall of the joint (4), and the top end surface of the joint is abutted against the bottom surface of the first sealing element (22).
6. The cementing head seal of claim 5, wherein the first seal (22) has a vertical height no greater than the depth of the first annular groove (211).
7. The cementing head sealing arrangement according to claim 5, wherein the sealing assembly (2) further comprises a second sealing element (23), a second annular groove (212) is formed in the upper portion of the outer side wall of the mounting ring (21), the second sealing element (23) is clamped in the second annular groove (212), the inner side wall of the second sealing element (23) is abutted against the groove bottom of the second annular groove (212), and the outer side wall of the second sealing element (23) is abutted against the inner wall of the joint (4).
8. Cement head sealing arrangement according to claim 1, characterised in that a plurality of impact members (15) are circumferentially arranged on the outer wall of the locking sleeve (1).
9. Cementing head seal according to claim 8, wherein the striker (15) is a rectangular block.
10. A cementing head sealing method, characterized in that a cementing head sealing device according to any one of claims 1-9 is used, comprising the steps of:
s1, connecting the joint (4) with the cement head, arranging the sealing assembly (2) at one end of the joint (4) connected with the joint, sleeving the joint (4) into the locking sleeve (1), screwing the locking sleeve (1) forward, and connecting the joint (4) with the locking sleeve (1);
s2, opening the locking assembly (3), and pushing the locking sleeve (1) from the side surface of the joint so that the joint enters the locking sleeve (1) through the avoidance notch (11);
s3, closing the locking assembly (3), screwing the locking sleeve (1) forward to enable the end face of the joint to be abutted to the sealing assembly (2), and continuing screwing the locking sleeve (1) forward until the locking sleeve (1) is fastened with the joint (4).
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|---|---|---|---|
| CN202211394051.8A CN116066007B (en) | 2022-11-08 | 2022-11-08 | Cement head sealing device and sealing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211394051.8A CN116066007B (en) | 2022-11-08 | 2022-11-08 | Cement head sealing device and sealing method |
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| CN116066007A CN116066007A (en) | 2023-05-05 |
| CN116066007B true CN116066007B (en) | 2024-03-22 |
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