CN209855739U - Sealing and fastening device for screw thread of wellhead casing - Google Patents
Sealing and fastening device for screw thread of wellhead casing Download PDFInfo
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- CN209855739U CN209855739U CN201920492649.8U CN201920492649U CN209855739U CN 209855739 U CN209855739 U CN 209855739U CN 201920492649 U CN201920492649 U CN 201920492649U CN 209855739 U CN209855739 U CN 209855739U
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Abstract
The utility model discloses a sealed fastener for well head sleeve pipe screw thread, the device uses annular locking clamp as the main part, and be provided with first regulation concave ring, sealed concave ring and second regulation concave ring on the inside centre gripping hole lateral wall of annular locking clamp, install respectively in first regulation concave ring and second regulation concave ring and adjust the floating ring, and can realize the position control of adjusting the floating ring through adjusting bolt, it has sealed injection valve to communicate with sealed concave ring, when using, suit in the outside of well head sleeve pipe screw thread through annular locking clamp, and through revolving and twisting adjusting bolt, make adjust after floating ring and well head sleeve pipe screw thread closely offset, again inject the injecting glue through sealed injection valve and seal, realize the seal of well head sleeve pipe screw thread position, solve the leakage problem; the sealing and fastening device for the screw thread of the wellhead casing has the advantages of simple structure, reasonable design, convenience in operation, good sealing property and the like.
Description
Technical Field
The utility model discloses a technical field of equipment for oil field oil recovery well especially relates to a sealed fastener that is used for well head sleeve pipe screw thread.
Background
In the production of oil production wells in oil fields, the well head casing often leaks easily at the threaded part connected with the annular steel plate. At present, once the thread leakage of the wellhead casing occurs, the production must be stopped, and a new casing must be replaced, so that the production process is delayed, and the production efficiency is low.
In the prior art, although some sealing devices are used for solving the leakage problem of the screw thread of the wellhead casing, the structure is complex, the operation is inconvenient, or the sealing effect is poor.
Therefore, how to develop a new sealing device to solve the above problems is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses a sealed fastener for well head sleeve pipe screw thread to solve the complicated and sealed poor scheduling problem of effect of structure that current sealing device exists at least.
The utility model provides a technical scheme specifically does, a sealed fastener for well head sleeve pipe screw thread, this sealed fastener includes: the device comprises an annular locking clamp 1, two adjusting floating rings 2, a plurality of adjusting screws 3 and a plurality of sealing agent injection valves 4;
the annular locking clamp comprises an annular locking clamp 1 and is characterized in that a clamping hole 13 penetrating through the upper end and the lower end is formed in the annular locking clamp 1, a first adjusting concave ring 111, a sealing concave ring 112 and a second adjusting concave ring 113 are sequentially arranged on the side wall of the clamping hole 13 from top to bottom along the axial direction at intervals, and a plurality of first screw holes, a plurality of mounting holes and a plurality of second screw holes which are respectively communicated with the first adjusting concave ring 111, the sealing concave ring 112 and the second adjusting concave ring 113 are formed in the outer side wall of the annular locking clamp 1;
the two adjusting floating rings 2 are respectively arranged in a first adjusting concave ring 111 and a second adjusting concave ring 113 in the clamping hole 13;
the adjusting screws 3 are respectively in one-to-one correspondence with the first screw holes and the second screw holes, and the adjusting screws 3 are respectively sequentially and threadedly installed in the corresponding first screw holes and the second screw holes, wherein the end parts of the adjusting screws 3 installed in the first screw holes are abutted against the adjusting floating ring 2 in the first adjusting concave ring 111, and the end parts of the adjusting screws 3 installed in the second screw holes are abutted against the adjusting floating ring 2 in the second adjusting concave ring 113;
the sealing injection valves 4 are respectively in one-to-one correspondence with the mounting holes, and a plurality of the sealing injection valves 4 are respectively sequentially mounted in the corresponding mounting holes and communicated with the sealing concave ring 112.
Preferably, the annular locking clamp 1 comprises: two locking clamps 11 and a plurality of locking bolts 12;
the cross section of each locking clamp 11 is semicircular, fixing pieces extending outwards in the radial direction are arranged at two ends of each locking clamp 11, each fixing piece is provided with a through hole, and when the two locking clamps 11 are buckled, the through holes in the fixing pieces at two ends of the two locking clamps 11 are in one-to-one correspondence;
the locking bolts 12 are respectively installed in through holes on fixing pieces at two ends of the two locking clamps 11 to fix and lock the two locking clamps 11.
Preferably, two end faces of the two locking clamps 11 are respectively provided with a corresponding limiting groove and a corresponding limiting protrusion.
Further preferably, each adjusting floating ring 2 is formed by two semi-circular arc floating ring split bodies.
Further preferably, an arc-shaped top plate 31 is arranged at the end of each adjusting screw 3.
The utility model provides a sealed fastener for well head sleeve pipe screw thread, use annular locking clamp as the main part, and be provided with first regulation concave ring on the inside centre gripping hole lateral wall of annular locking clamp, sealed concave ring and second regulation concave ring, install respectively in first regulation concave ring and second regulation concave ring and adjust the floating ring, and can realize adjusting the position control that floats the ring through adjusting bolt, there is sealed injection agent valve with sealed concave ring intercommunication, when this sealed fastener uses, press from both sides the outside of suit at well head sleeve pipe screw thread through annular locking, and through revolving adjusting bolt, make and adjust the floating ring and closely offset the back with well head sleeve pipe screw thread, it is sealed to pour into the injecting glue into through sealed injection agent valve, realize the sealed of well head sleeve pipe screw thread position, solve the leakage problem.
The utility model provides a sealed fastener for well head sleeve pipe screw thread has advantages such as simple structure, reasonable in design, convenient operation, leakproofness are good.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a sealing and fastening device for a wellhead casing thread according to an embodiment of the present disclosure;
fig. 2 is a cross-sectional view along AA of fig. 1.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
In view of the problems of complex structure and poor sealing effect of the sealing device for the screw thread of the wellhead casing in the prior art, the present embodiment provides a sealing and fastening device for the screw thread of the wellhead casing, as shown in fig. 1, the sealing and fastening device mainly comprises an annular locking clamp 1, two adjusting floating rings 2, a plurality of adjusting screws 3 and a plurality of sealing injection valves 4, wherein a clamping hole 13 penetrating through the upper and lower ends is formed inside the annular locking clamp 1, a first adjusting concave ring 111, a sealing concave ring 112 and a second adjusting concave ring 113 are sequentially arranged on the side wall of the clamping hole 13 along the axial direction from top to bottom at intervals, a plurality of first screw holes, a plurality of mounting holes and a plurality of second screw holes are formed on the outer side wall of the annular locking clamp 1, the two adjusting floating rings 2 are respectively mounted in the first adjusting concave ring 111 and the second adjusting concave ring 113 in the clamping hole 13 The adjusting screws 3 are in one-to-one correspondence with the first screw holes and the second screw holes respectively, and the adjusting screws 3 are sequentially and threadedly mounted in the corresponding first screw holes and the corresponding second screw holes respectively, wherein the end portions of the adjusting screws 3 mounted in the first screw holes are abutted against the adjusting floating rings 2 in the first adjusting concave rings 111, the end portions of the adjusting screws 3 mounted in the second screw holes are abutted against the adjusting floating rings 2 in the second adjusting concave rings 113, the sealant injecting valves 4 are respectively in one-to-one correspondence with the mounting holes, and the sealant injecting valves 4 are sequentially mounted in the corresponding mounting holes respectively and communicated with the sealing concave rings 112.
The specific use method of the sealing and fastening device for the screw thread of the wellhead casing comprises the following steps: when the sealing structure is used, the annular locking clamp is sleeved outside a leakage position of a screw thread of a wellhead casing, then the adjusting bolt is screwed, the end part of the adjusting bolt props against the adjusting floating ring, the adjusting floating ring is tightly abutted to the surface of the screw thread of the wellhead casing, finally, glue injection sealing is injected through the sealing glue injection valve, wherein each sealing glue injection valve needs to keep uniform glue injection pressure which is required to be larger than the leakage pressure of the valve and is generally 5-10 Mpa until the sealing cavity is filled with the sealing concave ring, the sealing cavity is filled, and a new sealing structure is formed, so that the purpose of leakage stopping is achieved.
The size of the annular locking clamp is produced according to the size of the inlet casing, errors are generated inevitably, the size errors of the annular locking clamp can be effectively offset through the design of adjusting the floating rings on the upper side and the lower side, the adjusting floating rings can be tightly attached to the surface of the inlet casing through adjustment of the adjusting screws, and the sealing performance of the inlet casing is further greatly improved.
In order to facilitate the installation between the annular sealing clamp and the wellhead casing, as an improvement of the technical scheme, referring to fig. 1, the annular locking clamp 1 mainly comprises two locking clamps 11 and a plurality of locking bolts 12, wherein the cross section of each locking clamp 11 is semi-circular arc, both ends of each locking clamp 11 are provided with fixing pieces extending outwards in the radial direction, each fixing piece is provided with a through hole, when the two locking clamps 11 are buckled, the through holes on the fixing pieces at both ends of the two locking clamps 11 are in one-to-one correspondence, and the plurality of locking bolts 12 are respectively installed in the through holes on the fixing pieces at both ends of the two locking clamps 11 to fix and lock the two locking clamps 11. The number of the locking bolts can be set as required, the number of the locking bolts corresponds to that of the through holes in the fixing pieces at the two ends of the locking clamp, and as shown in figure 2, the number of the locking bolts is 6, and the number of the locking bolts is 3 each time.
Through the structural design of above-mentioned annular sealing clamp, when with the installation of well head sleeve pipe, correspond two locking clamps and detain in well head sheathed tube both sides, then lock through the locking bolt, until the both ends sealing joint of two locking clamps, simple to operate.
In order to further facilitate the installation and simultaneously improve the sealing performance of the two end faces of the two locking clamps, as an improvement of the technical scheme, the two end faces of the two locking clamps 11 are respectively provided with a corresponding limiting groove and a corresponding limiting bulge.
In order to match the structural design of the two locking clamps, as an improvement of the technical scheme, the adjusting floating ring 2 is also designed to be formed by two semi-circular arc floating ring split bodies.
In order to improve the contact surface between the end of the adjusting screw and the adjusting floating ring and improve the adjusting effect, as an improvement of the technical scheme, the end of each adjusting screw 3 is provided with an arc-shaped top plate 31.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (5)
1. A seal fastener for a wellhead casing thread, comprising: the device comprises an annular locking clamp (1), two adjusting floating rings (2), a plurality of adjusting screws (3) and a plurality of sealing agent injection valves (4);
the clamping hole (13) penetrating through the upper end and the lower end is formed in the annular locking clamp (1), the first adjusting concave ring (111), the sealing concave ring (112) and the second adjusting concave ring (113) are sequentially arranged on the side wall of the clamping hole (13) from top to bottom at intervals along the axial direction, and a plurality of first screw holes, a plurality of mounting holes and a plurality of second screw holes which are respectively communicated with the first adjusting concave ring (111), the sealing concave ring (112) and the second adjusting concave ring (113) correspondingly are formed in the outer side wall of the annular locking clamp (1);
the two adjusting floating rings (2) are respectively arranged in a first adjusting concave ring (111) and a second adjusting concave ring (113) in the clamping hole (13);
the adjusting screws (3) are respectively in one-to-one correspondence with the first screw holes and the second screw holes, and the adjusting screws (3) are sequentially and respectively installed in the corresponding first screw holes and the second screw holes in a threaded manner, wherein the end parts of the adjusting screws (3) installed in the first screw holes are abutted against the adjusting floating ring (2) in the first adjusting concave ring (111), and the end parts of the adjusting screws (3) installed in the second screw holes are abutted against the adjusting floating ring (2) in the second adjusting concave ring (113);
the sealing agent injection valves (4) are respectively in one-to-one correspondence with the mounting holes, and the sealing agent injection valves (4) are respectively sequentially mounted in the corresponding mounting holes and communicated with the sealing concave ring (112).
2. A seal fastening device for a wellhead casing thread according to claim 1 characterized in that the annular locking clamp (1) comprises: two locking clamps (11) and a plurality of locking bolts (12);
the cross section of each locking clamp (11) is in a semi-circular arc shape, two ends of each locking clamp (11) are respectively provided with a fixing sheet extending outwards along the radial direction, each fixing sheet is provided with a through hole, and when the two locking clamps (11) are buckled, the through holes on the fixing sheets at the two ends of the two locking clamps (11) are in one-to-one correspondence;
a plurality of locking bolts (12) are respectively arranged in through holes on fixing sheets at two ends of the two locking clamps (11) to fix and lock the two locking clamps (11).
3. The sealing and fastening device for the screw thread of the wellhead casing according to claim 2, characterized in that the end surfaces of the two ends of the two locking clamps (11) are respectively provided with a corresponding limiting groove and a corresponding limiting bulge.
4. The sealing and fastening device for the screw thread of the wellhead casing according to claim 2, characterized in that each adjusting floating ring (2) is composed of two semi-circular arc floating ring split bodies.
5. A seal fastening device for a wellhead casing thread according to claim 1 characterised in that the end of each adjusting screw (3) is provided with an arc shaped top plate (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920492649.8U CN209855739U (en) | 2019-04-12 | 2019-04-12 | Sealing and fastening device for screw thread of wellhead casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920492649.8U CN209855739U (en) | 2019-04-12 | 2019-04-12 | Sealing and fastening device for screw thread of wellhead casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209855739U true CN209855739U (en) | 2019-12-27 |
Family
ID=68937502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920492649.8U Active CN209855739U (en) | 2019-04-12 | 2019-04-12 | Sealing and fastening device for screw thread of wellhead casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209855739U (en) |
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2019
- 2019-04-12 CN CN201920492649.8U patent/CN209855739U/en active Active
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