Hanger and thermal recovery wellhead four-way joint

Abstract

The utility model relates to the technical field of hangers and thermal recovery wellhead four-way joints, in particular to a hanger and a thermal recovery wellhead four-way joint. The hanger comprises a hanger body, a limiting ring is arranged on the periphery of the bottom end of the hanger body, four sets of telescopic grooves are formed in the limiting ring, first springs are arranged in the telescopic grooves, the outer sides of the first springs are connected with limiting columns, and inserting grooves are formed in the front ends of the limiting columns; four groups of slots are formed in the periphery of the top end of the wellhead four-way joint; the thermal recovery wellhead four-way joint comprises the hanger. The wellhead four-way hanger can prevent the hanger main body from moving up and down in the wellhead four-way joint, and prevent hot steam from moving out of the slot to cause incomplete sealing of the wellhead four-way joint.

Description

Technical Field

[0001] The utility model relates to the field of a hanger and a thermal recovery wellhead spool, in particular to a hanger and a thermal recovery wellhead spool. Background Art

[0002] The double-tube thermal recovery wellhead device is an important device for heavy oil production, mainly composed of three parts: tubing head, casing head and Christmas tree. Among them, the double-tube spool is an important component of the Christmas tree; during the oil production process, the heavy oil will pass through the Christmas tree part of the double-tube thermal recovery wellhead device.

[0003] In the prior art, during thermal recovery and gas injection, a hanger is supported and placed in a spool, an oil pipe is connected below the hanger, and a top screw is threaded through the side wall of the spool to limit the hanger and prevent the hanger and the oil pipe from moving upward due to the upward force when steam is injected.

[0004] However, in the prior art, when the hanger is placed in the wellhead spool, hot steam is easy to penetrate from the top screw and spray out from one side of the spool. After the hot steam is sprayed out, there is a safety risk and the overall sealing is poor. Utility Model Content

[0005] The utility model aims to provide a hanger and a thermal recovery wellhead spool to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hanger body, a limit ring is arranged around the bottom end of the hanger body, four groups of telescopic grooves are opened on the limit ring, a first spring is arranged in the telescopic groove, the outer side of the first spring is connected to the limit column, and a plug-in groove is opened at the front end of the limit column; and a wellhead four-way, four groups of slots are opened around the top of the wellhead four-way.

[0007] Preferably, a plurality of groups of support plates are provided at the inner bottom end of the wellhead four-way, which can support the hanger body placed in the wellhead four-way, and a limiting ring is provided with a first O-ring at the upper and lower ends of the telescopic groove, and the first O-ring can seal the bottom end of the hanger body.

[0008] Preferably, a first spring is provided in the telescopic slot, and a limiting column is connected to the outer side of the first spring. The first spring can bounce the limiting column into the slot through tension, so that the limiting column limits the hanger body to prevent the hanger body from moving up and down.

[0009] Preferably, a top screw can be inserted into the insertion groove opened at the front end of the limit column, and the top screw can be inserted into the insertion groove through the slot, so that the top screw limits the limit column to prevent the limit column from shrinking into the telescopic groove, thereby eliminating the limitation on the wellhead four-way.

[0010] Preferably, a clamping groove is formed around the outer side of the front end of the limiting column, and a second O-ring is clamped in the clamping groove. The limiting column has an extension groove in the middle of the inner side of the clamping groove, and the extension groove connects the clamping groove with the plug-in groove.

[0011] Preferably, second springs are provided on both sides of the extension groove, and the inner sides of the two groups are connected to the supporting blocks. When the top screw is inserted into the plug-in groove, the plug-in groove can squeeze the second spring, so that the second spring squeezes the second O-ring outward to expand the second O-ring.

[0012] A thermal recovery wellhead spool comprises the above-mentioned hanger.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a hanger and a thermal recovery wellhead four-way. When a first spring drives a limiting column to extend and retract into a slot, the limiting column is fixed in the slot by inserting a top screw into the slot and then inserting the slot into an inserting slot. The limiting column begins to limit a hanger body to prevent the hanger body from moving up and down in the wellhead four-way. At this time, the top screw inserted into the inserting slot begins to squeeze a top holding block. The top holding block expands outwards through a second spring connected at both sides to squeeze a second O-ring in the holding slot, so that the second O-ring expands. The second O-ring begins to seal between the limiting column and the slot to prevent hot steam from escaping from the slot and causing incomplete sealing of the wellhead four-way. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the hanger body of the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of the hanger body.

[0019] In the figure: wellhead spool 1, hanger body 2, top screw 3, limit ring 4, first O-ring 5, telescopic groove 6, first spring 7, limit column 8, plug-in groove 9, holding groove 10, second O-ring 11, extension groove 12, second spring 13, top holding block 14, support plate 15, slot 16. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of 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.

[0021] Embodiment 1

[0022] See also Figure 1-Figure 4 The utility model provides a technical solution: a hanger body 2, a limit ring 4 is arranged around the bottom end of the hanger body 2, four groups of telescopic grooves 6 are opened on the limit ring 4, a first spring 7 is arranged in the telescopic groove 6, the outer side of the first spring 7 is connected to a limit column 8, and a plug-in groove 9 is opened at the front end of the limit column 8; and a wellhead cross 1, four groups of slots 16 are opened around the top of the wellhead cross 1; by rotating the hanger body 2, the limit column 8 connected to the first spring 7 in the telescopic groove 6 is inserted into the slot 16.

[0023] Embodiment 2

[0024] On the basis of the first embodiment, a plurality of support plates 15 are arranged at the inner bottom end of the wellhead spool 1, and the support plates 15 can receive the hanger body 2 placed in the wellhead spool 1. The limit ring 4 is provided with a first O-ring 5 at the upper and lower ends of the telescopic groove 6, and the first O-ring 5 can seal the bottom end of the hanger body 2; a first spring 7 is arranged in the telescopic groove 6, and a limit column 8 is connected to the outer side of the first spring 7. The first spring 7 can bounce the limit column 8 into the slot 16 through tension, so that the limit column 8 limits the hanger body 2 to prevent the hanger body 2 from moving up and down; the top screw 3 can be inserted into the plug-in groove 9 opened at the front end of the limit column 8, and the top screw 3 can be inserted into the plug-in groove 9 through the slot 16, so that the top screw 3 limits the limit column 8 to prevent the limit column 8 from shrinking into the telescopic groove 6, thereby canceling the limitation on the wellhead four-way 1; when the first spring 7 drives the limit column 8 to expand and contract into the slot 16, the limit column 8 is fixed in the slot 16 by inserting the top screw 3 into the slot 16, and then inserting the slot 16 into the plug-in groove 9.

[0025] Embodiment 3

[0026] On the basis of the second embodiment, a clamping groove 10 is provided around the outer side of the front end of the limiting column 8, and a second O-ring 11 is clamped in the clamping groove 10. The limiting column 8 is provided with an extension groove 12 in the middle of the inner side of the clamping groove 10, and the extension groove 12 makes the clamping groove 10 communicate with the plug-in groove 9; second springs 13 are provided on both sides of the extension groove 12, and the inner sides of the two groups are connected to a holding block 14. When the top screw 3 is plugged into the plug-in groove 9, the plug-in groove 9 can squeeze the second spring 13, so that the second spring 13 squeezes the second O-ring 11 outward to expand the second O-ring 11; the holding block 14 expands outward through the second springs 13 connected on both sides, squeezes the second O-ring 11 in the clamping groove 10, and expands the second O-ring 11. The second O-ring 11 begins to seal between the limiting column 8 and the slot 16 to prevent hot steam from escaping from the slot 16, resulting in incomplete sealing of the wellhead four-way 1.

[0027] In actual use, when the hanger body 2 is placed in the wellhead spool 1, the support plate 15 at the bottom end of the wellhead spool 1 receives the hanger body 2, and the first O-rings 5 ​​arranged at the upper and lower ends of the limit ring 4 at the bottom end of the hanger body 2 begin to seal between the wellhead spool 1 and the hanger body 2 to prevent hot steam from spraying out from between the wellhead spool 1 and the hanger body 2. At this time, the telescopic groove 6 provided on the limit ring 4 arranged at the bottom end of the hanger body 2 is parallel to the slot 16. Then, by rotating the hanger body 2, the limit column 8 connected to the first spring 7 in the telescopic groove 6 is inserted into the slot 16. When the first spring 7 drives the limit column 8 to telescope into the slot 16 At this time, by inserting the top screw 3 into the slot 16, and then inserting the slot 16 into the insertion slot 9, the limit column 8 is fixed in the slot 16, and the limit column 8 begins to limit the hanger body 2 to prevent the hanger body 2 from moving up and down in the wellhead four-way 1. At this time, the top screw 3 inserted into the insertion slot 9 begins to squeeze the top holding block 14, and the top holding block 14 expands outward through the second spring 13 connected on both sides, and squeezes the second O-ring 11 in the holding groove 10, so that the second O-ring 11 expands, and the second O-ring 11 begins to seal between the limit column 8 and the slot 16 to prevent hot steam from escaping from the slot 16 and causing incomplete sealing of the wellhead four-way 1.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hanger, characterized in that: The hanger comprises: a hanger body (2), a limit ring (4) is arranged around the bottom end of the hanger body (2), four groups of telescopic grooves (6) are opened on the limit ring (4), a first spring (7) is arranged in the telescopic groove (6), the outer side of the first spring (7) is connected to a limit column (8), and the front end of the limit column (8) is provided with a plug-in groove (9); and A wellhead spool (1) is provided with four groups of slots (16) around the top of the wellhead spool (1).

2. A hanger according to claim 1, characterized in that: The inner bottom end of the wellhead spool (1) is provided with a plurality of support plates (15), the support plates (15) can receive the hanger body (2) placed in the wellhead spool (1), the limiting ring (4) is provided with a first O-ring (5) at the upper and lower ends of the telescopic groove (6), the first O-ring (5) can seal the bottom end of the hanger body (2).

3. A hanger according to claim 2, characterized in that: A first spring (7) is arranged in the telescopic groove (6), and the outer side of the first spring (7) is connected to a limiting column (8). The first spring (7) can bounce the limiting column (8) into the slot (16) through tension, so that the limiting column (8) limits the hanger body (2) to prevent the hanger body (2) from moving up and down.

4. A hanger according to claim 3, characterized in that: A top screw (3) can be inserted into the insertion groove (9) provided at the front end of the limit column (8), and the top screw (3) can be inserted into the insertion groove (9) through the slot (16), so that the top screw (3) limits the limit column (8) to prevent the limit column (8) from shrinking into the telescopic groove (6), thereby eliminating the limit on the wellhead cross (1).

5. A hanger according to claim 4, characterized in that: The front end of the limiting column (8) is provided with a retaining groove (10) around the outside, and a second O-ring (11) is retained in the retaining groove (10). The limiting column (8) is provided with a protruding groove (12) in the middle of the inner side of the retaining groove (10), and the protruding groove (12) enables the retaining groove (10) to communicate with the plug-in groove (9).

6. A hanger according to claim 5, characterized in that: Second springs (13) are arranged on both sides of the extension groove (12), and the inner sides of the two groups are connected to the supporting blocks (14). When the top screw (3) is inserted into the insertion groove (9), the insertion groove (9) can press the second spring (13), so that the second spring (13) presses the second O-ring (11) outwardly, thereby expanding the second O-ring (11).

7. A thermal recovery wellhead spool, characterized in that: The hanger comprises the hanger described in any one of claims 1 to 6.

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