CN217519207U - Be applied to reinforcing seal structure of RD type downhole tool - Google Patents
Be applied to reinforcing seal structure of RD type downhole tool Download PDFInfo
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- CN217519207U CN217519207U CN202221554044.5U CN202221554044U CN217519207U CN 217519207 U CN217519207 U CN 217519207U CN 202221554044 U CN202221554044 U CN 202221554044U CN 217519207 U CN217519207 U CN 217519207U
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- downhole tool
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Abstract
The utility model discloses a be applied to reinforcing seal structure of RD type downhole tool, at RD type downhole tool's rupture disc with one-level sealing device and second grade sealing device have set gradually between step hole lateral wall and the bottom surface. The primary sealing device is a rectangular sealing ring sleeved on the step surface; the second-stage sealing device comprises an annular embedded groove formed in the inner bottom surface of the step hole, an opening metal deformation sealing ring is embedded into the annular embedded groove, and the sealing plugging performance of the assembly position of the RD-type underground tool rupture disc is improved through a two-stage sealing structure. When the rectangular sealing ring is subjected to high temperature, high pressure and high H 2 The increase of the working capacity under the severe working conditions of S and the like and the existence of the old rectangular sealing ring due to the fact that the rectangular sealing ring exceeds the applicable temperature rangeWhen the state of change inefficacy, carry out effectual sealed shutoff once more through opening metal deformation sealing washer inner chamber to improve the leakproofness of RD type instrument's rupture disc structure department on the whole, and resist the ability of adverse circumstances in the pit.
Description
Technical Field
The utility model relates to a RD type is instrument sealing technique field in the pit especially relates to a be applied to reinforcing seal structure of RD type instrument in the pit.
Background
RD (Rupture Disc) type downhole tools refer to downhole tools with Rupture discs, such as RD samplers, RD safety circulation valves, and the like. The function of the rupture disc is: after the downhole tool is assembled on the downhole tool, pressure is applied through the outer annular space, so that the inner part of the rupture disk is ruptured and communicated, the inside and the outside of the downhole tool are communicated, the communication pressure flows into the downhole tool, and the corresponding action principle of the downhole tool is realized by the driving force of the communication pressure.
In recent years, the technology is accompanied with deep wells, ultra-deep wells, high-temperature and high-pressure wells and high-H wells 2 The increase of the workload under the severe working conditions such as S and the like causes that the RD type tool often has the problem of sealing failure at the rupture disc, and the analysis reason comprises the following aspects:
1. due to the structural size limitation, the conventional sealing ring used for assembling the rupture disc has small specification and size and weaker sealing high-pressure capacity;
2. the common rubber sealing ring has a use temperature range, and the problem of aging and failure can occur when the use temperature range is exceeded;
3. the rubber sealing ring has high requirement on the roughness of the sealing surface, but the rubber sealing ring has high H 2 Under the corrosion working conditions such as S, the sealing surface of the tool metal piece is always corroded, so that the sealing of the tool for assembling the rupture disk is failed.
Disclosure of Invention
To the problem that exists, the utility model aims at providing a be applied to reinforcing seal structure of RD type downhole tool improves the sealed shutoff nature that RD type downhole tool rupture disc assembly department supported through two-stage seal structure to and be working as rectangular seal because of high temperature, high pressure, high H 2 And when the operation amount is increased under severe working conditions such as S and the like, the capability of resisting the severe underground environment is improved through the opening metal deformation sealing ring.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an strengthen seal structure for RD type downhole tool, RD type downhole tool has mutually wear to establish sealed dabber and rupture disk urceolus seted up the step hole on the rupture disk urceolus, the downthehole embedding of step has the rupture disk that link up the outer wall selectivity of rupture disk urceolus, its characterized in that: and a primary sealing device and a secondary sealing device are sequentially arranged between the rupture disc and the side wall and the bottom surface of the stepped hole.
Preferably, a step surface is formed at the bottom of the outer wall of the rupture disc, the primary sealing device is a rectangular sealing ring sleeved on the step surface, and the rectangular sealing ring is tightly attached to and in sealing contact with the side wall of the step hole.
Preferably, the secondary sealing device comprises an annular embedded groove formed in the bottom surface of the stepped hole, an opening metal deformation sealing ring is embedded into the annular embedded groove, and the opening metal deformation sealing ring is tightly attached to and in sealing contact with the bottom surface of the rupture disc.
Preferably, the opening metal deformation sealing ring is provided with an opening, an arc supporting section and flat sealing sections which are symmetrical up and down, and a groove-shaped retainer ring which is sequentially attached to the inner wall of the annular embedded groove and the arc supporting section at the same time is further arranged in the annular embedded groove.
Preferably, the annular embedded groove is located the inner wall of opening one side sets up to the inclined structure, its interior bottom with opening metal deformation sealing washer lower part the tip of flat sealed section offsets spacingly.
The utility model has the advantages that: the enhanced sealing structure comprises a rectangular sealing ring which is sleeved at the bottom end of a rupture disc of the RD-type tool, and an opening metal deformation sealing ring which is arranged between the rupture disc and an outer barrel of the rupture disc, and the two-stage enhanced sealing structure of the RD-type tool is realized through the combination of the rectangular sealing ring and the opening metal deformation sealing ring.
When the rectangular sealing ring is subjected to high temperature, high pressure and high H 2 The increase of the workload under the severe working conditions such as S and the like, and when the rectangular sealing ring exceeds the applicable temperature range and has an aging failure state, the inner cavity of the metal deformation sealing ring is effectively sealed and blocked again through the opening, so that the RD type tool is integrally improvedThe sealing performance of the rupture disc structure and the capability of resisting the severe underground environment.
The sealing structure is simple in additional operation and suitable for being popularized to the sealing treatment of any RD type tool; the opening metal deformation sealing ring is preferably made of stainless steel material, has more reliable sealing pressure and is suitable for high-temperature and high-H 2 S, and the like under corrosive environments.
Drawings
Fig. 1 is a schematic diagram of an RD type downhole tool (RD type circulation valve) according to the present invention.
Fig. 2 is an enlarged view of a structure a in fig. 1 according to the present invention.
Fig. 3 is an enlarged view of a structure B in fig. 2 according to the present invention.
Fig. 4 is the cross section structure diagram of the ring-shaped embedded groove of the utility model.
Fig. 5 is the cross-sectional structure view of the metal deformation sealing ring of the present invention.
Fig. 6 is the sectional structure view of the groove-shaped retainer ring of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.
Referring to fig. 1-6, the enhanced sealing structure applied to the RD-type downhole tool is shown, the RD-type downhole tool is provided with a sealing mandrel 1 and a rupture disc outer cylinder 2 which are mutually penetrated, a stepped hole 2a is formed in the rupture disc outer cylinder 2, and a rupture disc 3 which selectively penetrates through the inner wall and the outer wall of the rupture disc outer cylinder 2 is embedded in the stepped hole 2a (preferably, the rupture disc 3 and the inner wall of the stepped hole 2a are in a threaded sealing connection structure). As shown in fig. 1, the RD circulation valve belongs to one type of RD downhole tools, wherein the rupture disk 3 has a middle hole communicated with the stepped hole 2a, the middle hole is in a closed state, when annular pressure is introduced to the outside, the middle hole of the rupture disk 3 is ruptured and communicated with the stepped hole 2a by external force, and then annular pressure (such as oil) is introduced between the inner wall of the rupture disk outer cylinder 2 and the sealing mandrel 1, and corresponding downhole action can be realized by the annular pressure through the design of an internal structure. In a conventional state, in a following well process, the hole in the rupture disk 3 is in a closed state, the downhole pressure is synchronously increased along with the increase of the downhole depth, oil gas and other liquid in the well can flow in from the space between the rupture disk 3 and the stepped hole 2a, so that the tool can act in advance, the working action of the tool cannot be smoothly completed when the tool is used in due time, and the normal use of the RD-type tool in the well is influenced.
Therefore, in order to improve the sealing performance of the RD-shaped tool at the rupture disk 3, a primary sealing device and a secondary sealing device are sequentially arranged between the rupture disk 3 and the side wall and the bottom surface of the stepped hole 2a, and a two-stage sealing structure is formed between the rupture disk 3 and the side wall and the bottom surface of the stepped hole 2a through the two-stage sealing devices, so that the influence of the increased pressure caused by the excessive well depth on the sealing performance of the rupture disk 3 is improved. Meanwhile, the two-stage sealing structure can effectively resist ultra-deep wells, high-temperature and high-pressure wells and high H 2 And S and the like under severe working conditions.
Specifically, as shown in fig. 2, a step surface 3a is formed at the bottom of the outer wall of the rupture disc 3, the primary sealing device is a rectangular sealing ring 4 sleeved on the step surface 3a, and the rectangular sealing ring 4 is in close contact with the side wall of the step hole 2a in a sealing manner. On the basis of threaded connection and sealing between the outer wall of the rupture disk 3 and the inner wall of the step surface 3a, the rectangular sealing ring 4 is extruded to realize close contact and sealing between the rupture disk 3 and the side wall and the bottom surface of the step surface 3a and between the rupture disk and the side wall of the step surface 3a, so that a primary sealing function of the rupture disk 3 of the RD type tool is realized.
Specifically, as shown in fig. 3 to 4, the secondary sealing device includes an annular insertion groove 2b formed in the inner bottom surface of the stepped hole 2a, an open metal deformation sealing ring 5 is inserted into the annular insertion groove, and the open metal deformation sealing ring 5 is in close contact with the bottom surface of the rupture disc 3 in a sealing manner. The sealing function between the bottom surface of the rupture disc 3 and the inner bottom surface of the stepped hole 2a is realized through the opening metal deformation sealing ring 5, and then the secondary sealing function at the rupture disc 3 of the RD type tool is realized. When the rectangular sealing ring 4 is subjected to high temperature, high pressure and high H 2 Increase of workload under severe working conditions such as S and the like, and overload due to rectangular sealing ring 4Under the conditions of aging failure and the like due to the excessive application of the temperature range, the effective sealing and plugging effect is realized through the opening metal deformation sealing ring 5, so that the sealing capacity of the RD type downhole tool rupture disk 3 for resisting the external environment is improved.
Specifically, as shown in fig. 5, the open metal deformed sealing ring 5 has an opening 501, an arc supporting section 51, and a flat sealing section 52 that is symmetrical up and down, and the open metal deformed sealing ring 5 performs the following functions: after the rectangular sealing ring 4 fails in response to the underground environment, annular pressure firstly flows into the annular embedded groove 2b after being blocked by the rectangular sealing ring 4, and simultaneously the opening 501 is filled with the inner cavity of the opening metal deformation sealing ring 5, so that the opening 501 is expanded outwards, and at the moment, the vertically symmetrical flat-attached sealing sections 52 are further sequentially attached to the bottom surface of the rupture disc 3 and the inner bottom surface of the annular embedded groove 2b, so that the gap between the rupture disc 3 and the step hole 2a is effectively blocked.
In order to improve the opening metal deformation sealing ring 5 and avoid the problem of fracture under larger annular pressure, as shown in fig. 3 and 6, a groove-shaped retainer ring 6 which is sequentially attached to the inner wall of the annular embedded groove 2b and the arc support section 51 at the same time is further arranged in the annular embedded groove. The groove-shaped retainer ring 6 is mainly used for supporting the arc supporting section 51 of the opening metal deformation sealing ring 5, so that the problem of fracture from the position due to large pressure is avoided.
In order to ensure the sealing function of the opening metal deformation sealing ring 5, as shown in fig. 3-4, the inner wall of the annular embedding groove 2b on one side of the opening 501 is set to be an inclined structure (shown as a in fig. 4, so that an annular pressure inlet b is formed at the top), and the inner bottom end of the inclined structure abuts against and is limited by the end of the flat sealing section 52 at the lower part of the opening metal deformation sealing ring 5. Carry on spacingly through this structure and recess type retaining ring 6 to opening metal deformation sealing washer 5, avoid under normal or pressurized state, opening metal deformation sealing washer 5 along the circumferential deflection and cause the problem that the leakproofness descends.
The principle of the utility model is that: the enhanced sealing structure comprises a rectangular sealing ring 4 sleeved at the bottom end of a rupture disc 3 of the RD type tool, so that the primary sealing function of the rupture disc 3 of the RD type tool is realized; on the basis, an annular embedded groove 2b is formed in the inner bottom surface of a step hole 2a, in which the rupture disc 3 is in contact with the rupture disc outer cylinder 2, and an open metal deformation sealing ring 5 is embedded in the annular embedded groove, so that a two-stage reinforced sealing structure of the RD-type tool is realized.
The rectangular sealing ring 4 can improve the defect that the RD-shaped tool resists the external environment and cannot effectively seal to cause the tool to act in advance on the basis of the original threaded connection and sealing of the rupture disc 3; when the rectangular sealing ring 4 is subjected to high temperature, high pressure and high H 2 The increase of the operating volume under the abominable operating mode such as S, and when there is the state of ageing failure because of the rectangular seal ring 4 exceeds the applicable temperature range, the external annular pressure passes through the rectangular seal ring 4, and enter into the annular embedded groove 2b from the annular pressure import b, simultaneously fill up the inner chamber of the opening metal deformation seal ring 5 from the opening 501, make its opening 501 expand outwards, the flat sealing section 52 of upper and lower symmetry further hugs closely in proper order on rupture disc 3 bottom surface and annular embedded groove 2b inner bottom surface at this moment, carry on the effectual shutoff with the clearance between rupture disc 3 and the step hole 2a, thus improve the leakproofness of rupture disc 3 structure department of RD type instrument on the whole, and resist the ability of abominable environment in the pit.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides an strengthen seal structure for RD type downhole tool, RD type downhole tool has sealed dabber (1) and rupture disc urceolus (2) of wearing to establish each other set up step hole (2a) on rupture disc urceolus (2), embedded rupture disc (3) that link up with rupture disc urceolus (2) inside and outside wall selectivity in step hole (2a), its characterized in that: a primary sealing device and a secondary sealing device are sequentially arranged between the rupture disc (3) and the side wall and the bottom surface of the stepped hole (2 a).
2. An enhanced seal configuration for an RD-type downhole tool according to claim 1, wherein: the bottom of the outer wall of the rupture disc (3) is provided with a step surface (3a), the primary sealing device is a rectangular sealing ring (4) sleeved on the step surface (3a), and the rectangular sealing ring (4) is tightly attached to and in sealing contact with the side wall of the step hole (2 a).
3. An enhanced seal configuration for an RD-type downhole tool according to claim 2, wherein: the secondary sealing device comprises an annular embedded groove (2b) formed in the bottom surface of the stepped hole (2a), an opening metal deformation sealing ring (5) is embedded into the annular embedded groove, and the opening metal deformation sealing ring (5) is tightly attached to the bottom surface of the rupture disc (3) in sealing contact.
4. An enhanced seal configuration for an RD-type downhole tool according to claim 3, wherein: the opening metal deformation sealing ring (5) is provided with an opening (501), an arc supporting section (51) and an up-and-down symmetrical flat-attaching sealing section (52), and a groove-shaped retainer ring (6) which is sequentially attached to the inner wall of the annular embedded groove (2b) and the arc supporting section (51) is further arranged in the annular embedded groove.
5. An enhanced seal configuration for an RD-type downhole tool according to claim 4, wherein: the inner wall of the annular embedded groove (2b) on one side of the opening (501) is of an inclined structure, and the bottom end of the inner wall is abutted to the end part of the flat sealing section (52) at the lower part of the opening metal deformation sealing ring (5) for limiting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221554044.5U CN217519207U (en) | 2022-06-21 | 2022-06-21 | Be applied to reinforcing seal structure of RD type downhole tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221554044.5U CN217519207U (en) | 2022-06-21 | 2022-06-21 | Be applied to reinforcing seal structure of RD type downhole tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217519207U true CN217519207U (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221554044.5U Active CN217519207U (en) | 2022-06-21 | 2022-06-21 | Be applied to reinforcing seal structure of RD type downhole tool |
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| Country | Link |
|---|---|
| CN (1) | CN217519207U (en) |
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2022
- 2022-06-21 CN CN202221554044.5U patent/CN217519207U/en active Active
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