CN115853443A - Telescopic compensation device - Google Patents
Telescopic compensation device Download PDFInfo
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- CN115853443A CN115853443A CN202111122082.3A CN202111122082A CN115853443A CN 115853443 A CN115853443 A CN 115853443A CN 202111122082 A CN202111122082 A CN 202111122082A CN 115853443 A CN115853443 A CN 115853443A
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Abstract
The invention belongs to the technical field of petroleum and natural gas well cementing tools, and particularly relates to a telescopic compensation device. The invention comprises a central pipe group and an outer pipe group sleeved on the central pipe group; the initial connection state between the central pipe group and the outer pipe group is a fixed connection state; an accommodating space is formed between the central pipe group and the outer pipe group, and a temperature memory alloy is arranged in the accommodating space and can push the central pipe group and the outer pipe group to generate relative displacement, so that the central pipe group and the outer pipe group are changed from a fixed connection state into a free state capable of relatively sliding along the axial direction of the central pipe group. The invention realizes the compensation of the length change of the sleeve by the relative sliding of the central pipe group and the outer pipe group, when the length of the sleeve is increased, the length of the sleeve is shortened by the sliding of the central pipe group and the outer pipe group, when the length of the sleeve is decreased, the length of the sleeve is increased by the sliding of the central pipe group and the outer pipe group, thereby controlling the stress change of the sleeve and preventing the sleeve from being damaged.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas well cementing tools, in particular to a casing expansion compensation device.
Background
The casing pipe deforms along with the change of the temperature under the influence of the change of the downhole temperature environment, so that the casing pipe deforms to cause damage. With the widespread use of casing in well cementing in recent years, casing damage due to downhole temperature changes has become more and more severe. In order to prevent slow production or casing damage, a great deal of work has been done and some success has been achieved in the completion process, but the rate of casing damage to the well still increases at greater than 10% due to inadequate implementation of the process, tools and special geological conditions. The sleeve pipe is damaged by the screw thread or deformed due to the thermal stress of axial change, and the later-stage production operation is influenced.
Disclosure of Invention
The invention aims to provide a casing expansion and contraction compensation device, which is used for relieving the thermal stress deformation of a casing string and controlling the internal stress value of the casing within the yield limit range through axial expansion and contraction adjustment so as to reduce the casing damage.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a telescopic compensation device comprises a central pipe group and an outer pipe group sleeved on the central pipe group; an accommodating space is formed between the central pipe group and the outer pipe group, and a temperature memory alloy is arranged in the accommodating space and can push the central pipe group and the outer pipe group to generate relative displacement, so that the central pipe group and the outer pipe group are changed from a fixed connection state into a free state capable of relatively sliding along the axial direction of the central pipe group.
Further, the center tube group comprises a center tube, a limiting boss is arranged in the middle of the outer circle of the center tube, and the outer side of the limiting boss is in contact with the inner side of the outer tube group.
Furthermore, the central tube group also comprises a lower joint which is sleeved on the central tube and is in threaded connection with the central tube.
Further, the outer tube assembly comprises a pressing ring, and the pressing ring comprises a main body part abutting against the end face of the top of the central tube and an extending part extending into the accommodating space; the extending part is sleeved on the central pipe and is connected with the central pipe in a sliding way.
Furthermore, the outer tube group still includes the outer tube, and the outer tube suit is in the center tube, and the interior circle of outer tube, the excircle of center tube, spacing boss, clamping ring form accommodation space.
Furthermore, the outer tube group still includes the top connection, and the top connection cartridge is in the outer tube and with the outer tube spiro union, is provided with the cushion ring between the lower extreme of top connection and the clamping ring.
Furthermore, the outer pipe group also comprises a buckle changing joint, the buckle changing joint comprises an upper joint and a lower joint, and a first boss is arranged on an inner circle of a joint of the upper joint and the lower joint; the upper joint is sleeved at the lower end of the outer pipe and is in threaded connection with the outer pipe, and the first boss abuts against the lower end of the outer pipe.
Furthermore, the outer tube group further comprises a limiting ring, the limiting ring is arranged below the first boss, and the space between the limiting ring and the limiting boss is a sliding space of the central tube group and the outer tube group.
Furthermore, the outer tube set further comprises a pressing cap ring, the pressing cap ring is sleeved on the lower connector and is in threaded connection with the lower connector, the pressing cap ring is provided with a second step surface, and the second step surface is in contact with the lower end of the limiting ring to limit the position of the limiting ring.
Furthermore, the outer tube group still includes high temperature resistant sand prevention ring, and the upper end of high temperature resistant sand prevention ring is connected with the lower extreme of pressure cap ring.
By combining the technical scheme, the invention has the technical effects that:
the casing expansion compensation device provided by the invention comprises a central pipe group and an outer pipe group sleeved on the central pipe group; the initial connection state between the central pipe group and the outer pipe group is a fixed connection state; an accommodating space is formed between the central pipe group and the outer pipe group, and a temperature memory alloy is arranged in the accommodating space and can push the central pipe group and the outer pipe group to generate relative displacement, so that the central pipe group and the outer pipe group are changed from a fixed connection state into a free state capable of relatively sliding along the axial direction of the central pipe group.
It should be noted that: the telescopic compensation device provided by the invention is arranged in the middle of the sleeve, and divides one sleeve into an upper sleeve and a lower sleeve, the lower end of the central pipe group is connected with the lower sleeve, and the upper end of the outer pipe group is connected with the upper sleeve. Hereinafter, the end of the central tube group connected to the lower casing and the end of the outer tube group connected to the upper casing are referred to as connection ends.
Because the central tube group and the outer tube group are in relative displacement after the central tube group and the outer tube group are pushed by the temperature memory alloy, the central tube group and the outer tube group are changed from a fixed connection state into a free state capable of sliding relatively along the axial direction of the central tube group, and the length of the telescopic compensation device can be changed freely within a certain range. Namely, when the temperature rises, the length of the sleeve is increased, so that the distance between the connecting ends of the upper sleeve and the lower sleeve is reduced, and the sleeve expansion compensation device is further compressed; when the temperature reduces, sleeve pipe length reduces, goes up the distance increase of the link of sleeve pipe and lower casing to stretch the telescopic compensation arrangement of sleeve pipe. Therefore, the change of the length of the sleeve is compensated through the relative sliding of the central pipe group and the outer pipe group, the internal stress of the sleeve caused by the change of the temperature length is reduced, the internal stress value of the sleeve is controlled within the yield limit range, and the damage of the sleeve is reduced. The problem that when one sleeve is changed in length due to temperature change, the internal stress of the sleeve is increased due to the fact that the length change is blocked due to the fact that the two ends of the sleeve are fixed is avoided.
Drawings
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 that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic half-sectional view of a casing expansion and contraction compensation device according to an embodiment of the present invention;
figure 2 is a cross-sectional view of the pressure ring 400 of figure 1;
FIG. 3 is a cross-sectional view of the buckle change connector 700 of FIG. 1;
FIG. 4 is a cross-sectional view of the gland ring 900 of FIG. 1;
fig. 5 is a cross-sectional view of the lower joint 1300 in fig. 1.
An icon: 100-upper joint; 200-an outer tube; 300-a cushion ring; 400-pressing a ring; 500-a central tube; 600-temperature memory alloy; 700-a buckle-changing joint; 800-a spacing ring; 900-pressing a cap ring; 1000-composite sealing ring; 1100-pin; 1200-high temperature resistant sand control ring; 1300-lower joint; 410-a body portion; 420-an extension; 510-a limit boss; 710-upper joint; 720-lower joint; 730-first step surface; 740 — a first boss; 910-a second step surface; 920-a first seal groove; 1310-a second seal groove; 1320-third step surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices 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 present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are 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.
Under the influence of the change of the downhole temperature environment, the casing deforms along with the change of the temperature, so that the casing deforms and is damaged. With the widespread use of casing in well cementing in recent years, casing damage due to downhole temperature changes has become more and more severe. In order to prevent slow production or casing damage, a great deal of work has been done and some success has been achieved in the completion process, but the rate of casing damage to the well still increases at greater than 10% due to inadequate implementation of the process, tools and special geological conditions. The sleeve pipe is damaged by the screw thread or deformed due to the thermal stress of axial change, and the later-stage production operation is influenced.
In view of this, the invention provides a telescopic compensation device, which comprises a central pipe group and an outer pipe group sleeved on the central pipe group; the initial connection state between the central pipe group and the outer pipe group is a fixed connection state; an accommodating space is formed between the central pipe group and the outer pipe group, a temperature memory alloy 600 is arranged in the accommodating space, and the temperature memory alloy 600 is configured to push the central pipe group and the outer pipe group to generate relative displacement so as to change the central pipe group and the outer pipe group from a fixed connection state to a free state capable of relatively sliding along the axial direction of the central pipe group.
It should be noted that: the telescopic compensation device provided by the invention is arranged in the middle of the sleeve, and divides one sleeve into an upper sleeve and a lower sleeve, the lower end of the central pipe group is connected with the lower sleeve, and the upper end of the outer pipe group is connected with the upper sleeve. Hereinafter, the end of the central tube group connected to the lower casing and the end of the outer tube group connected to the upper casing are referred to as connection ends.
Because the central tube group and the outer tube group are in a free state which can slide relatively along the axial direction of the central tube group from a fixed connection state after the central tube group and the outer tube group are pushed by the temperature memory alloy 600 to generate relative displacement, the length of the telescopic compensation device can be changed freely within a certain range. Namely, when the temperature rises, the length of the sleeve is increased, so that the distance between the connecting ends of the upper sleeve and the lower sleeve is reduced, and the sleeve expansion compensation device is further compressed; when the temperature reduces, sleeve pipe length reduces, goes up the distance increase of the link of sleeve pipe and lower casing to stretch the telescopic compensation arrangement of sleeve pipe. Therefore, the length change of the sleeve is compensated through the relative sliding of the central pipe group and the outer pipe group, the internal stress of the sleeve generated by the length change of the temperature is reduced, the internal stress value of the sleeve is controlled within the yield limit range, and the damage of the sleeve is reduced. The problem that when one sleeve is changed in length due to temperature change, the internal stress of the sleeve is increased due to the fact that the length change is blocked due to the fact that the two ends of the sleeve are fixed is avoided.
The structure and shape of the telescopic expansion compensation device provided by the embodiment are described in detail below with reference to the accompanying drawings:
the central tube group in this embodiment includes a central tube 500, as shown in fig. 1, a limiting boss 510 is disposed in the middle of the outer circle of the central tube 500, and external threads are disposed on both sides of the central tube 500.
Further, the outer side of the limiting boss 510 is provided with a sealing groove, and a sealing ring is arranged at the sealing groove, so that the sealing performance between the limiting boss 510 and the outer pipe group is improved.
Further, the outer surface of the central tube 500 is provided with a plating layer to improve the thermochemical stability and corrosion resistance of the outer surface of the central tube 500, and to improve the service life of the tool.
Further, the outer surface of the center pipe 500 is chrome-plated to improve stability, wear resistance, and smoothness of the outer surface of the center pipe 500.
Further, the central tube assembly further includes a lower joint 1300, as shown in fig. 1 and 5, the lower joint 1300 is sleeved on the lower side of the central tube 500, the upper side of the upper joint 100 is provided with an internal thread, and the upper thread is matched with the external thread on the lower side of the central tube 500 to screw the central tube 500 and the upper joint 100.
Further, the inner side of the lower joint 1300 is provided with a third step surface 1320, and the third step surface 1320 is matched with the lower end surface of the central tube 500 to limit the depth of the lower joint 1300 which is sleeved into the central tube 500.
Further, the lower end of the lower joint 1300 is provided with an external thread for connection with a bushing.
Further, a second sealing groove 1310 is disposed above the third step surface 1320, and a sealing ring is disposed in the second sealing groove 1310 to improve the sealing performance at the connection between the lower joint 1300 and the central pipe 500.
The outer tube assembly in this embodiment includes a press ring 400, as shown in fig. 1 and 2, the press ring 400 includes a main body portion 410 abutting against the top end face of the central tube 500 and an extending portion 420 extending into the accommodating space; the inlet 420 is sleeved on the central tube 500 and slidably connected with the central tube 500.
Further, the outer tube assembly further comprises an outer tube 200, as shown in fig. 1, the outer tube 200 is sleeved on the central tube 500, an accommodating space is formed by the inner circle of the outer tube 200, the outer circle of the central tube 500, the limiting boss 510 and the lower end surface of the extending part 420, and the accommodating space is filled with the temperature memory alloy 600.
Further, the outer tube group still includes top connection 100, and the downside of top connection 100 is provided with the external screw thread, and the upside of outer tube 200 is provided with the internal thread, and top connection 100 cartridge is in outer tube 200 and passes through screw thread fixed connection with outer tube 200. The upper side of the upper joint 100 is provided with an internal thread for coupling with a sleeve.
Further, a sealing groove is formed in an outer circle of the lower side of the upper joint 100, the sealing groove is formed below the external thread of the lower side of the upper joint 100, and a sealing ring is arranged in the sealing groove to improve the sealing performance between the upper joint 100 and the outer pipe 200.
Further, the outer circumferential surface of the upper joint 100 is provided with a step surface, the step surface abuts against the top end surface of the central tube 500, and the step surface is used for limiting the depth of the upper joint 100 inserted into the outer tube 200.
Further, a cushion ring 300 is arranged between the upper joint 100 and the pressure ring 400, the lower end face of the upper joint 100 is in contact with the upper end face of the cushion ring 300, the upper end face of the main body portion 410 of the pressure ring 400 is in contact with the lower end face of the cushion ring 300, and when the temperature memory alloy 600 expands due to heating, the temperature memory alloy is used for reducing the impact of the pressure ring 400 on the upper joint 100 and limiting the upward moving distance of the pressure cap ring 900 through the upper joint 100.
Further, the outer tube assembly further comprises a buckle change joint 700, as shown in fig. 1 and 3, the buckle change joint 700 comprises an upper joint 710 and a lower joint 720; the upper joint 710 is sleeved on the lower side of the outer pipe 200, the upper joint 710 is provided with internal threads, the lower side of the outer pipe 200 is provided with external threads, and the upper joint 710 is connected with the lower side of the outer pipe 200 through threads; meanwhile, the tail end of the lower thread of the outer tube 200 is provided with a step surface which is abutted against the upper end surface of the upper joint 710 so as to limit the depth of the upper joint 710 sleeved into the outer tube 200; the inner circle of the joint of the upper joint 710 and the lower joint 720 of the outer pipe 200 is provided with a first boss 740, and the first boss 740 is abutted against the lower end face of the outer pipe 200 to limit the depth of the upper joint 710 sleeved in the outer pipe 200.
Further, the outer tube assembly further comprises a limiting ring 800, the upper end face of the limiting ring 800 is in contact with the lower end face of the first boss 740, a sliding space of the central tube combined outer tube set is formed by a space between the limiting ring 800 and the limiting boss 510, and the downward movement distance of the central tube set is limited by the matching of the limiting ring 800 and the limiting boss 510.
Further, the outer tube assembly further comprises a capping ring 900, as shown in fig. 1 and 4, an inner thread is provided on an upper side of the capping ring 900, an outer thread is provided on the lower joint 720, and the capping ring 900 is sleeved on the lower joint 720 and is in threaded connection with the lower joint 720. The gland ring 900 is provided with a second step surface 910, and the second step surface 910 contacts with the lower end surface of the limit ring 800 and cooperates with the lower end surface of the first boss 740 to limit the position of the limit ring 800 together. Further, the buckle changing connector 700 is further provided with a first step surface 730, and the first step surface 730 is located at the tail end of the external thread of the lower connector 720 to limit the depth of the pressing cap ring 900 sleeved into the lower connector 720.
Further, the outer tube set further includes a pin 1100, and the pin 1100 is inserted into the central tube 500 after radially passing through the capping ring 900, so that the central tube 500 is fixedly connected with the capping ring 900, and further, the central tube set is fixedly connected with the outer tube set.
Further, the inner side of the pressing cap ring 900 is further provided with a first sealing groove 920, a composite sealing ring 1000 is arranged in the first sealing groove 920, and the composite sealing ring 1000 is in sliding sealing fit with the outer surface of the central pipe 500 so as to guarantee the sealing performance of tools in the well cementation or later operation process.
Further, outer tube group still includes high temperature resistant sand prevention ring 1200, and high temperature resistant sand prevention ring 1200 sets up in the top of lower clutch 1300 and is connected with the lower extreme that presses cap ring 900 to prevent that the rock debris in the pit from getting into center tube 500 outer surface, thereby the life of extension instrument. Further, the high temperature resistant sand prevention ring 1200 is made of a high temperature resistant flexible metal material.
Furthermore, the casing expansion compensation device provided by the invention can be provided with a plurality of devices according to the length of the casing string so as to ensure that the stress of the casing is fully eliminated.
The assembly process of the casing expansion compensation device provided by the invention is as follows:
firstly, sequentially connecting an outer pipe 200, a buckle changing joint 700, a limiting ring 800, a cap pressing ring 900 and a high-temperature resistant sand prevention ring 1200; then, the composite sealing ring 1000 is installed on the pressing cap ring 900; then, a sealing ring is sleeved on the limiting boss 510 of the central pipe 500, and the sealing ring is sleeved on the second sealing groove 1310 of the lower joint 1300; then, the central tube 500 is inserted into the outer tube 200, and then the lower joint 1300 is inserted into the central tube 500 and connected through threads; then, a pin 1100 is driven to fixedly connect the gland ring 900 with the central pipe 500; then, the temperature memory alloy 600 is filled into the accommodating space and the pressure ring 400 is inserted; then the cushion ring 300 is put in; finally, a sealing ring is sleeved on the upper connector 100, and the upper connector 100 is inserted into the outer pipe 200 and connected through threads.
The working process of the casing telescoping compensation device provided by the invention is as follows:
the casing is divided into two sections which are respectively connected to two ends of the casing telescopic compensation device, when the casing is installed, the lower end of the casing is put into the well, and then the position of the lower end of the casing is fixed. After the downhole temperature rises, the temperature memory alloy 600 expands, the pressing ring 400 is pushed firstly, the pressing ring 400 extrudes the cushion ring 300, the upper joint 100 is extruded finally, the central pipe group and the outer pipe group move relatively, and the central pipe group is fixed and connected with the sleeve below the sleeve telescopic compensation device, so that the central pipe group is relatively fixed, the outer pipe group is pushed upwards, the pin 1100 is cut off, and the outer pipe group and the central pipe group can slide along the axial direction. Then the position of the sleeve above the sleeve telescopic device is adjusted according to the slidable distance between the central tube group and the outer tube group, so that the length of the sleeve telescopic device in the axial direction can be extended or shortened, sufficient telescopic compensation amount is ensured, and the sleeve above the sleeve telescopic device is fixed. When the temperature continues to rise, the lengths of the sleeves at the two ends of the sleeve telescopic compensation device are extended, and the length of the sleeve telescopic compensation device is compressed; when the temperature drops, the lengths of the sleeves at the two ends of the sleeve telescopic compensation device are shortened, the length of the sleeve telescopic compensation device is lengthened, the stress of the sleeves generated due to temperature change is counteracted through the change of the length of the sleeve telescopic compensation device, the stress value in the sleeves is controlled, and the damage of the sleeves generated due to the stress is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The telescopic compensation device is characterized by comprising a central pipe group and an outer pipe group sleeved on the central pipe group;
an accommodating space is formed between the central pipe group and the outer pipe group, a temperature memory alloy (600) is arranged in the accommodating space, and the temperature memory alloy (600) is configured to push the central pipe group and the outer pipe group to generate relative displacement so as to enable the central pipe group and the outer pipe group to be converted from a fixed connection state into a free state capable of relatively sliding along the axial direction of the central pipe group.
2. The telescopic compensation device according to claim 1, wherein the central tube group comprises a central tube (500), a limit boss (510) is arranged in the middle of the outer circle of the central tube (500), and the outer side of the limit boss (510) is in contact with the inner side of the outer tube group.
3. The telescopic compensation device according to claim 2, wherein the central tube assembly further comprises a lower joint (1300), and the lower joint (1300) is sleeved on the central tube (500) and is screwed with the central tube (500).
4. A casing telescoping compensation device according to claim 3, wherein the outer tube set comprises a press ring (400), the press ring (400) comprises a main body part (410) abutting against the top end face of the central tube (500) and an extending part (420) extending into the accommodating space; the extending part (420) is sleeved on the central pipe (500) and is connected with the central pipe (500) in a sliding mode.
5. The telescopic compensation device according to claim 4, wherein the outer tube set further comprises an outer tube (200), the outer tube (200) is sleeved on the central tube (500), and the inner circle of the outer tube (200), the outer circle of the central tube (500), the limiting boss (510) and the press ring (400) form the accommodating space.
6. The telescopic compensating device of claim 5, wherein the outer tube set further comprises an upper joint (100), the upper joint (100) is inserted into the outer tube (200) and is screwed with the outer tube (200); a cushion ring (300) is arranged between the lower end of the upper joint (100) and the pressure ring (400).
7. The telescopic compensation device according to claim 6, wherein the outer tube group further comprises a buckle changing joint (700), the buckle changing joint (700) comprises an upper joint (710) and a lower joint (720), and an inner circle of a joint of the upper joint (710) and the lower joint (720) is provided with a first boss (740); the upper joint (710) is sleeved at the lower end of the outer pipe (200) and is in threaded connection with the outer pipe (200), and the first boss (740) abuts against the lower end of the outer pipe (200).
8. The telescopic compensation apparatus of claim 7, wherein the outer tube set further comprises a limiting ring (800), the limiting ring (800) is disposed below the first boss (740), and a space between the limiting ring (800) and the limiting boss (510) is a sliding space of the central tube set and the outer tube set.
9. The casing telescoping compensation device of claim 8, wherein the outer pipe set further comprises a gland ring (900), the gland ring (900) is sleeved on the lower joint (720) and is in threaded connection with the lower joint (720), the gland ring (900) is provided with a second step surface (910), and the second step surface (910) is in contact with the lower end of the limiting ring (800) to limit the position of the limiting ring (800).
10. The casing telescoping compensation arrangement of claim 9, wherein the outer tube set further comprises a high temperature resistant sand control ring (1200), an upper end of the high temperature resistant sand control ring (1200) being connected to a lower end of the gland ring (900).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111122082.3A CN115853443A (en) | 2021-09-24 | 2021-09-24 | Telescopic compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111122082.3A CN115853443A (en) | 2021-09-24 | 2021-09-24 | Telescopic compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115853443A true CN115853443A (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111122082.3A Pending CN115853443A (en) | 2021-09-24 | 2021-09-24 | Telescopic compensation device |
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| CN (1) | CN115853443A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117722141A (en) * | 2024-02-07 | 2024-03-19 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
-
2021
- 2021-09-24 CN CN202111122082.3A patent/CN115853443A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117722141A (en) * | 2024-02-07 | 2024-03-19 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
| CN117722141B (en) * | 2024-02-07 | 2024-04-26 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
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