Suspension device and wellhead device
By setting an annular inner boss and an outer boss in the suspension device, combining the guide inclined surface and limit cylinder surface, the problems of bearing performance and annular gap stability between the sleeves are solved, and the good bearing performance and stability of the suspension device are achieved The maintenance of the annular gap ensures the safety and smooth progress of drilling operations.
Patent Information
- Application Number
- CN202421065304.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-16
AI Technical Summary
It is difficult to ensure good load-bearing performance and stable annular gap size between casings in oil and gas drilling operations, which affects the safety and smooth progress of drilling operations.
A suspension device including a load-bearing ring, a first casing hanging device, a second casing hanging device and a third casing hanging device are designed, by providing an annular inner boss and an outer boss on the load-bearing ring and a casing hanging device. The table, combined with the guide bevel and limit cylinder, achieves stable suspension and ring gap maintenance between the sleeves, and a male and female connector is installed on the outer sleeve to meet the needs of different lengths.
The good load-bearing performance of the suspension device and the stable maintenance of the ring gap size are achieved, ensuring the safety and smooth progress of drilling operations, and providing a simple, stable and reliable design, and providing sufficient load-bearing capacity through a 45° guide slope.
Smart Images
Figure CN222350683U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil and natural gas mining equipment, in particular to a suspension device and a wellhead device. Background Art
[0002] Wellhead devices generally refer to devices installed at the wellhead during oil and gas drilling to seal the annular spaces between the oil pipe, casing and each layer of casing. The suspension device is an indispensable part of the wellhead device. Based on different scenarios, there are two types: mudline hanger and ground hanger.
[0003] Mudline hangers are mainly used in offshore oil drilling and completion operations. They are located near the seabed mudline and are key components that connect the seabed wellhead to the upper drilling structure. Surface hangers are usually used in drilling operations on land or in shallow waters. They are located near the wellhead and are mainly used to hang and support casing strings for drilling, completion and oil production operations. The design and structure of surface hangers are different from those of mudline hangers, but they also need to have sufficient strength and stability to ensure the safety and smooth progress of drilling operations. In general, mudline hangers and surface hangers play an important role in oil and gas drilling operations, and they each have different characteristics and functions to adapt to different operating environments and needs.
[0004] For each casing in the hanger, it is necessary to ensure good load-bearing and stability of the annular gap between the casings. Utility Model Content
[0005] The utility model aims to provide a suspension device and a wellhead device to solve the problems existing in the above-mentioned prior art, have good bearing performance, and can maintain a stable annular gap size between each casing.
[0006] To achieve the above purpose, the utility model provides the following solutions:
[0007] The utility model provides a hanging device, comprising a bearing ring, a first casing hanger, a second casing hanger and a third casing hanger which are sequentially sleeved from the outside to the inside; the upper and lower ends of the bearing ring are respectively connected to an outer casing guide tube; the upper end of the first casing hanger is fixedly connected to a first tieback tool, and the upper end of the first tieback tool and the lower end of the first casing hanger are both connected to a first guide tube; the upper end of the second casing hanger is fixedly connected to a second tieback tool, and the upper end of the second tieback tool and the lower end of the second casing hanger are both connected to a second guide tube; the upper end of the third casing hanger is fixedly connected to a third tieback tool, and the upper end of the third tieback tool and the lower end of the third casing hanger are both connected to a third guide tube; the inner side walls of the bearing ring and the first casing hanger are both fixedly provided with a first annular inner boss, and the outer side walls of the first casing hanger and the second casing hanger are both correspondingly fixedly provided with a first annular outer boss; the interior of the first annular inner boss comprises a first inverted tapered hole and a first cylindrical hole, the first inverted conical hole is located above the first cylindrical hole, the small mouth end of the first inverted conical hole is connected and communicated with one end of the first cylindrical hole, the inner diameter of the small mouth end of the first inverted conical hole is the same as the inner diameter of the first cylindrical hole, the lower end of the first annular outer boss has a first guide slope and a first limiting cylindrical surface, the first guide slope matches the side wall of the first inverted conical hole, and the first limiting cylindrical surface matches the inner side wall of the first cylindrical hole; at least one annular limiting receiving groove is provided on the inner side wall of the second casing hanger, and at least one annular limiting receiving platform is correspondingly provided on the outer side wall of the third casing hanger, each of the annular limiting receiving platforms can be located in one of the annular limiting receiving grooves from top to bottom along the axial direction of the second casing hanger, and the cooperation between the annular limiting receiving platform and the annular limiting receiving groove can limit the third casing hanger from continuing to move downward along the axial direction of the second casing hanger.
[0008] Preferably, a male and female connector is provided on the outer sleeve conduit at the upper end of the carrying ring.
[0009] Preferably, the inclination angle of the first guiding slope is 45°.
[0010] The utility model also provides a wellhead device, comprising the suspension device described in any one of the above items, a base assembly, a casing head assembly, a second cava hanger assembly, a casing four-way assembly and a third cava hanger assembly; the base assembly is placed on the top of the outer casing guide tube at the upper end of the bearing ring; the casing head assembly is fixed above the base assembly, and the inverted cava at the bottom of the casing head assembly is used to clamp the upper end of the first guide tube at the upper end of the first back-connecting tool; the second cava hanger assembly is fixed inside the casing head assembly, and the inverted cava of the second cava hanger assembly is used to clamp the upper end of the second guide tube at the upper end of the second back-connecting tool; the casing four-way assembly is fixed above the casing head assembly; the third cava hanger assembly is fixed inside the casing four-way assembly, and the inverted cava of the third cava hanger assembly is used to clamp the upper end of the third guide tube at the upper end of the third back-connecting tool.
[0011] Compared with the prior art, the utility model has achieved the following technical effects:
[0012] The suspension device provided by the utility model is characterized in that a first annular inner boss is arranged on the inner wall of the load-bearing ring and the first casing hanger, and a corresponding first annular outer boss is arranged on the outer side wall of the first casing hanger and the second casing hanger, and a first guiding inclined surface and a first limiting cylindrical surface are respectively matched with the corresponding first inverted cone hole and the first cylindrical hole, so as to provide load-bearing for the next-level casing hanger to suspend and suspend on the previous level; the utility model has a simple structure, is stable and reliable, has good load-bearing performance, and can maintain a stable annular gap size between each casing.
[0013] Furthermore, the male and female connectors provided on the outer sheath catheter can be easily adapted to outer sheath catheters of different lengths, and the connection is simple, convenient and reliable.
[0014] Furthermore, a 45° first guide slope is adopted, that is, corresponding steps are all formed at 45°, which can provide sufficient bearing capacity.
[0015] The utility model also provides a wellhead device, which realizes a stable suspension effect on each conduit by adopting a suspension device with good load-bearing performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1A schematic diagram of the overall structure of the suspension device provided by the utility model;
[0018] Figure 2 The present invention is a schematic structural diagram of a wellhead device provided by the utility model.
[0019] In the figure:
[0020] 1-carrying ring; 11-outer casing conduit; 12-first annular inner boss; 121-first inverted tapered hole; 122-first cylindrical hole; 13-male and female connectors;
[0021] 2-first casing hanger; 21-first guide tube; 22-first tie-back tool; 23-first annular outer boss; 231-first guide slope; 232-first limiting cylindrical surface;
[0022] 3-second casing hanger; 31-second guide tube; 32-second tie-back tool; 33-annular limit receiving groove;
[0023] 4-third casing hanger; 41-third guide tube; 42-third tie-back tool; 43-annular limit receiving platform;
[0024] 5-base assembly;
[0025] 6-Casing head assembly;
[0026] 7-Second slip hanger assembly;
[0027] 8- casing cross assembly;
[0028] 9-Third slip hanger assembly. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] The utility model aims to provide a suspension device and a wellhead device to solve the problems existing in the prior art, have good bearing performance, and can maintain a stable annular gap size between each casing.
[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0032] Embodiment 1
[0033] This embodiment provides a suspension device, which is mainly but not limited to use on mud lines and ground wellheads, such as Figure 1-2 As shown, it includes a load ring 1, a first casing hanger 2, a second casing hanger 3 and a third casing hanger 4 which are sequentially sleeved from the outside to the inside; the upper and lower ends of the load ring 1 are respectively connected with an outer casing guide tube 11; the upper end of the first casing hanger 2 is fixedly connected to the first tie-back tool 22, and the upper end of the first tie-back tool 22 and the lower end of the first casing hanger 2 are both connected with a first guide tube 21; the upper end of the second casing hanger 3 is fixedly connected to the second tie-back tool 32, and the upper end of the second tie-back tool 32 and the lower end of the second casing hanger 3 are both connected with a second guide tube 31; the upper end of the third casing hanger 4 is fixedly connected to the third tie-back tool 42, and the upper end of the third tie-back tool 42 and the lower end of the third casing hanger 4 are both connected with a third guide tube 41; the inner side walls of the load ring 1 and the first casing hanger 2 are both fixedly provided with a first annular inner boss 12 (as shown in FIG. Figure 1 The first casing hanger 2 and the second casing hanger 3 are respectively provided with a first annular outer boss 23 (eg Figure 1 The first annular inner boss 12 includes a first inverted conical hole 121 and a first cylindrical hole 122, the first inverted conical hole 121 is located above the first cylindrical hole 122, the small end of the first inverted conical hole 121 is connected and communicated with one end of the first cylindrical hole 122, the inner diameter of the small end of the first inverted conical hole 121 is the same as the inner diameter of the first cylindrical hole 122, the lower end of the first annular outer boss 23 has a first guiding inclined surface 231 and a first limiting cylindrical surface 232, the first guiding inclined surface 231 matches the side wall of the first inverted conical hole 121, and the first limiting cylindrical surface 232 matches the inner side wall of the first cylindrical hole 122; at least one annular limiting receiving groove 33 (such as Figure 1 The third casing hanger 4 has at least one annular limit receiving platform 43 (eg, Figure 1 The circled part in the middle), each annular limit receiving platform 43 can be located in an annular limit receiving groove 33 from top to bottom along the axial direction of the second casing hanger 3, and the cooperation between the annular limit receiving platform 43 and the annular limit receiving groove 33 can limit the third casing hanger 4 from continuing to move downward along the axial direction of the second casing hanger 3. By setting the first annular inner boss 12 on the inner wall of the load ring 1 and the first casing hanger 2, and setting the corresponding first annular outer boss 23 on the outer wall of the first casing hanger 2 and the second casing hanger 3, the first guide inclined surface 231 and the first limit cylindrical surface 232 are respectively matched with the corresponding first inverted cone hole 121 and the first cylindrical hole 122, so as to provide load-bearing for the next stage casing hanger to suspend, and to suspend on the previous stage; it has a simple structure, is stable and reliable, has good load-bearing performance, and can maintain a stable annular gap size between each casing.
[0034] Among them, the size of each tube applies:
[0035] Specifically, the outer tube 11 is a 30-inch tube; the first tube 21 is a 20-inch tube; the second tube 31 is a 13-3 / 8-inch tube; and the third tube 41 is a 9-5 / 8-inch tube.
[0036] Among them, regarding the connecting components of the outer sheath catheter 11:
[0037] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, a male and female connector 13 is provided on the outer sleeve conduit 11 at the upper end of the carrying ring 1. The male and female connector 13 provided on the outer sleeve conduit 11 can be conveniently adapted to different lengths of the outer sleeve conduit 11, and the connection is simple, convenient and reliable.
[0038] Specifically, the upper and lower ends of the carrying ring 1 are connected to the outer sleeve guide tube 11 by welding, which is easy to operate on site.
[0039] Wherein, regarding the inclination setting of the first guiding inclined surface 231:
[0040] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the inclination angle of the first guiding inclined surface 231 is 45°. The first guiding inclined surface 231 of 45° is adopted, that is, the corresponding steps are all 45°, which can provide sufficient bearing capacity.
[0041] Among them, regarding the first tie-back tool 22, the second tie-back tool 32, and the third tie-back tool 42:
[0042] Specifically, the first tieback tool 22, the second tieback tool 32 and the third tieback tool 42 are all existing tieback equipment and will not be described in detail here. Through the tieback tool, the corresponding casing can be tied back to the wellhead equipment on the ground, which is convenient and quick.
[0043] Embodiment 2
[0044] This embodiment provides a wellhead device, such as Figure 2As shown, it includes the suspension device of embodiment 1, a base assembly 5, a casing head assembly 6, a second slip hanger assembly 7, a casing cross assembly 8 and a third slip hanger assembly 9; the base assembly 5 is placed on the top of the outer casing guide tube 11 at the upper end of the load ring 1; the casing head assembly 6 is fixed above the base assembly 5, and the inverted slip at the bottom of the casing head assembly 6 is used to clamp the upper end of the first guide tube 21 at the upper end of the first back-connecting tool 22; the second slip hanger assembly 7 is fixed inside the casing head assembly 6, and the inverted slip of the second slip hanger assembly 7 is used to clamp the upper end of the second guide tube 31 at the upper end of the second back-connecting tool 32; the casing cross assembly 8 is fixed above the casing head assembly 6; the third slip hanger assembly 9 is fixed inside the casing cross assembly 8, and the inverted slip of the third slip hanger assembly 9 is used to clamp the upper end of the third guide tube 41 at the upper end of the third back-connecting tool 42. By adopting a suspension device with good load-bearing performance, a stable suspension effect for each conduit is achieved.
[0045] Specific instructions:
[0046] like Figure 1 and Figure 2 As shown, the 30-inch conduit is welded to the 30-inch carrying ring 1, the 30-inch conduit is welded to the 30-inch male and female connector 13, and the 30-inch conduit is lowered to the specified depth as required.
[0047] The 20-inch casing is connected to the bottom of the 20-inch first casing hanger 2 by threads, the top of the 20-inch first tieback tool 22 is connected to the 20-inch casing by threads, the 20-inch first tieback tool 22 is connected to the 20-inch first casing hanger 2 by threads, and the 20-inch first casing hanger 2 is lowered to the 45° step inside the 30-inch load ring 1. The top 20-inch casing is roughly cut to the specified height.
[0048] Install the base assembly 5 to the top of the 30-inch conduit, precision-cut the 20-inch casing to the specified height, grind the chamfers, apply lubricating oil, install the casing head assembly 6 to the top of the 20-inch casing and the base assembly 5, and perform a pressure test on the non-metallic seal after installation. If qualified, activate the inverted slip at the bottom of the casing head assembly 6.
[0049] The 13-3 / 8-inch casing is connected to the bottom of the 13-3 / 8-inch second casing hanger 3 by threads, the top of the 13-3 / 8-inch second tieback tool 32 is connected to the 13-3 / 8-inch casing by threads, the 13-3 / 8-inch second tieback tool 32 is connected to the 13-3 / 8-inch second casing hanger 3 by threads, and the 13-3 / 8-inch second casing hanger 3 is lowered to the 45° step inside the 20-inch first casing hanger 2. The top 13-3 / 8-inch casing is roughly cut to the specified height.
[0050] Install the 13-3 / 8-inch second slip hanger assembly 7 onto the 45° step inside the casing head assembly 6, precision cut the 13-3 / 8-inch casing to the specified height, grind the chamfers, apply lubricating oil, place a metal gasket in the gasket groove on the top of the casing head assembly 6, install the casing cross assembly 8 on top of the 13-3 / 8-inch casing and the casing head assembly 6, perform a pressure test on the non-metallic seals after installation, and tighten the bolts after passing the test.
[0051] The 9-5 / 8-inch casing is connected to the bottom of the 9-5 / 8-inch third casing hanger 4 by threads, the top of the 9-5 / 8-inch third tieback tool 42 is connected to the 9-5 / 8-inch casing by threads, the 9-5 / 8-inch third tieback tool 42 is connected to the 9-5 / 8-inch third casing hanger 4 by threads, and the 9-5 / 8-inch third casing hanger 4 is lowered to the 45° step inside the 13-3 / 8-inch second casing hanger 3. The top 9-5 / 8-inch casing is roughly cut to the specified height.
[0052] Install the 9-5 / 8-inch third slip hanger assembly 9 to the 45° step inside the casing spool assembly 8, cut the 9-5 / 8-inch casing to the specified height, and place a metal gasket in the gasket groove at the top of the casing spool assembly 8. Install the remaining equipment according to site requirements.
[0053] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A suspension device, characterized in that: It includes a load ring, a first casing hanger, a second casing hanger and a third casing hanger which are sequentially sleeved from outside to inside; The upper and lower ends of the carrying ring are respectively connected with outer sleeve guide tubes; The upper end of the first casing hanger is fixedly connected to a first tieback tool, and the upper end of the first tieback tool and the lower end of the first casing hanger are both connected to a first guide tube; The upper end of the second casing hanger is fixedly connected to the second tie-back tool, and the upper end of the second tie-back tool and the lower end of the second casing hanger are both connected to a second guide tube; The upper end of the third casing hanger is fixedly connected to the third tie-back tool, and the upper end of the third tie-back tool and the lower end of the third casing hanger are both connected to a third guide tube; The inner side walls of the load-bearing ring and the first casing hanger are both fixedly provided with a first annular inner boss, and the outer side walls of the first casing hanger and the second casing hanger are both correspondingly fixedly provided with a first annular outer boss; the interior of the first annular inner boss includes a first inverted tapered hole and a first cylindrical hole, the first inverted tapered hole is located above the first cylindrical hole, the small mouth end of the first inverted tapered hole is connected and communicated with one end of the first cylindrical hole, the inner diameter of the small mouth end of the first inverted tapered hole is the same as the inner diameter of the first cylindrical hole, the lower end of the first annular outer boss has a first guiding inclined surface and a first limiting cylindrical surface, the first guiding inclined surface matches the side wall of the first inverted tapered hole, and the first limiting cylindrical surface matches the inner side wall of the first cylindrical hole; At least one annular limit receiving groove is provided on the inner side wall of the second casing hanger, and at least one annular limit receiving platform is correspondingly provided on the outer side wall of the third casing hanger. Each of the annular limit receiving platforms can be located in one of the annular limit receiving grooves from top to bottom along the axial direction of the second casing hanger, and the cooperation between the annular limit receiving platform and the annular limit receiving groove can limit the third casing hanger from continuing to move downward along the axial direction of the second casing hanger.
2. The suspension device according to claim 1, characterized in that: The outer sleeve conduit at the upper end of the carrying ring is provided with a male and female connector.
3. The suspension device according to claim 1, characterized in that: The inclination angle of the first guiding slope is 45°.
4. A wellhead device, characterized in that: It comprises a suspension device as described in any one of claims 1 to 3, a base assembly, a casing head assembly, a second slip hanger assembly, a casing spool assembly and a third slip hanger assembly; The base assembly is placed on the top of the outer sleeve conduit at the upper end of the carrying ring; The casing head assembly is fixedly mounted above the base assembly, and the inverted slip at the bottom of the casing head assembly is used to clamp the upper end of the first conduit at the upper end of the first tie-back tool; The second slip hanger assembly is fixedly arranged inside the casing head assembly, and the inverted slip of the second slip hanger assembly is used to clamp the upper end of the second conduit at the upper end of the second tie-back tool; The casing cross assembly is fixedly arranged above the casing head assembly; The third slip hanger assembly is fixedly arranged inside the casing spool assembly, and the inverted slip of the third slip hanger assembly is used to clamp the upper end of the third conduit at the upper end of the third tie-back tool.