Coronal plug testing device for underwater Christmas tree

Abstract

The utility model relates to a coronal plug testing device for an underwater Christmas tree, and relates to the technical field of petroleum drilling and production equipment. Comprising a pressure applying container which is used for placing the coronal plug and testing the pressure of the coronal plug; the driving tool is arranged on the pressure applying container in a penetrating mode in the first direction; the sealing cover is arranged on the pressure applying container, and the sealing cover is used for sealing an annular gap between the driving tool and the pressure applying container; according to the coronal plug testing device for the underwater Christmas tree, the driving tool is pressed downwards in one direction to drive the driving cylinder of the coronal plug to open the locking block of the coronal plug, so that the locking block is locked on the locking profile in the center hole. According to the utility model, the pressure applying container is arranged and is used for carrying out sealing pressure testing on the coronal plug. A driving tool is arranged, and the coronal plug is fed into the pressure applying container through the driving tool and is arranged on a seating step in the center hole of the pressure applying container in a seating mode. Therefore, it can be simulated that the coronal plug seat is placed in an inner Christmas tree cap or an inner hole of a tubing hanger. Therefore, the simulated pressure test of the coronal plug is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil drilling and production equipment technical field, in particular to a kind of crown plug test device for underwater Christmas tree. BACKGROUND

[0002] Two crown plugs are arranged in vertical direction in horizontal Christmas tree, wherein, lower crown plug is installed in tubing hanger, and upper crown plug is installed in inner Christmas tree cap. Crown plug is used to block crude oil flowing upward or overflowing, so that crude oil flows out from production flow passage hole in the side of tubing hanger, and reaches production manifold through valve group. Crown plug is pressure barrier in vertical direction of production passage in horizontal Christmas tree, and provides guarantee for normal work of tubing hanger. Before crown plug leaves factory, it needs to be tested to test its sealing performance.

[0003] Therefore, it is urgent to develop a kind of crown plug test device for underwater Christmas tree to solve the problem of testing the sealing performance of crown plug. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of crown plug test device for underwater Christmas tree, for solving the problem of testing the sealing performance of crown plug.

[0005] The utility model provides a kind of crown plug test device for underwater Christmas tree, comprising:

[0006] Pressure container, for seat crown plug, and pressure test is carried out to crown plug;And

[0007] Driving tool, along first direction is arranged on pressure container, and driving tool is used to send crown plug into pressure container, and seat on the seat step in the center hole of pressure container;

[0008] Sealing cover, it is set on pressure container, and sealing cover is used to seal annular gap between driving tool and pressure container;

[0009] Wherein, the crown plug test device for underwater Christmas tree is configured as the lock block of driving cylinder of crown plug being driven to be opened by driving tool along a direction, to lock on the locking profile in the center hole.

[0010] In an embodiment, pressure container includes:

[0011] Pressure test cylinder, seat step and locking profile are arranged in the inner hole of pressure test cylinder, and locking profile is above seat step;And

[0012] First connecting flange, it is set on one end of pressure test cylinder;And

[0013] Second connecting flange, it is set on the other end of pressure test cylinder;

[0014] screwed on the first connecting flange and one end of the test cylinder, and the second connecting flange and the other end of the test cylinder, for fixing the first connecting flange and the second connecting flange on the two ends of the test cylinder respectively;

[0015] a sealing member arranged at the connection between the first connecting flange and the test cylinder, and the connection between the second connecting flange and the test cylinder;

[0016] wherein a first test channel and a second test channel are arranged on the outer periphery of the test cylinder, both of which are in communication with the inner hole of the test cylinder, the first test channel is above the locking profile for testing the sealing pressure of the upper end of the crown plug, and the second test channel is below the locking profile for testing the sealing pressure of the lower end of the crown plug.

[0017] In one embodiment, a first annular sealing groove is arranged at the connection between the first connecting flange and the test cylinder, and the sealing member is arranged in the first annular sealing groove.

[0018] In one embodiment, a second annular sealing groove is arranged at the connection between the second connecting flange and the test cylinder, and the sealing member is arranged in the second annular sealing groove.

[0019] In one embodiment, the threaded fastener includes a locking stud and a locking nut, the locking stud is threaded through the first connecting flange and the test cylinder, and the locking nut is screwed on the end of the locking stud exposed from the first connecting flange, the locking stud is threaded through the second connecting flange and the test cylinder, and the locking nut is screwed on the end of the locking stud exposed from the second connecting flange.

[0020] In one embodiment, a central threaded hole is arranged on the first connecting flange, which is concentric with the inner hole of the test cylinder, and the driving tool includes:

[0021] a screw rod which is threadedly matched with the central threaded hole; and

[0022] a pressing disc arranged on one end of the screw rod, which is used to press the driving cylinder; and

[0023] a screwing disc arranged on the other end of the screw rod;

[0024] wherein the crown plug testing device for the underwater Christmas tree is configured to rotate the screwing disc to rotate the screw rod and drive the pressing disc to press the driving cylinder, so as to make the locking block open the locking profile locked in the central hole.

[0025] In one embodiment, the screw rod, the pressing disc and the screwing disc are of an integrated structure.

[0026] In one embodiment, the sealing cover includes:

[0027] a cover body arranged on the first connecting flange, and a threaded fastener penetrating through the first connecting flange, the cover body and the pressure test cylinder for fixing the first connecting flange, the cover body and the pressure test cylinder into an integrated body;

[0028] a sealing gasket arranged at the joint of the cover body and the first connecting flange for sealing the gap between the cover body and the first connecting flange.

[0029] In one embodiment, the cover body comprises a cavity and a connecting flange disc arranged at the opening of the cavity, a threaded fastener is used for fixing the flange disc, the first connecting flange and the pressure test cylinder into an integrated body, and a sealing gasket is used for sealing the gap between the flange disc and the first connecting flange.

[0030] Compared with the prior art, the utility model has the advantages that the pressure container is arranged, and the crown plug is sealed in a closed space by the pressure container. Thus, the crown plug can be sealed for pressure test. The driving tool is arranged, and the crown plug is sent into the pressure container and seated on the seating step in the central hole of the pressure container by the driving tool. Thus, the crown plug can be simulated to be seated in the inner hole of the inner Christmas tree cap or the tubing hanger. Thus, the simulated pressure test of the crown plug is realized. Meanwhile, the accuracy and reliability of the test are improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] The utility model will be described in more detail below based on the embodiments and with reference to the drawings.

[0032] Figure 1 is the three-dimensional structure schematic view of the crown plug test device for the underwater Christmas tree in the embodiment of the utility model;

[0033] Figure 2 is Figure 1 the three-dimensional structure schematic view of the pressure container in the embodiment;

[0034] Figure 3 is Figure 1 the three-dimensional structure schematic view of the driving tool in the embodiment;

[0035] Figure 4 is the assembly relationship schematic view of the crown plug test device for the underwater Christmas tree and the crown plug.

[0036] Reference signs:

[0037] 10, pressure vessel; 11, test cylinder; 111, seating step; 112, locking profile; 12, first connecting flange; 13, second connecting flange; 14, threaded fastener; 15, sealing element; 16, first test passage; 17, second test passage; 20, driving tool; 21, screw rod; 22, lower pressing disc; 23, screwing disc; 30, sealing cover; 31, cover body; 32, sealing gasket; 100, crown plug test device for underwater Christmas tree; 200, crown plug; 201, driving cylinder; 202, locking block. DETAILED DESCRIPTION

[0038] The utility model will be further described below with reference to the drawings.

[0039] It should be noted that the specific structure of the crown plug 200 in the present application is the prior art in the art, and its structure has been disclosed in Chinese invention patent CN 107939324A, which will not be described here.

[0040] As shown in the drawings, the utility model provides a crown plug test device 100 for underwater Christmas tree, which comprises a pressure vessel 10, a driving tool 20 and a sealing cover 30. Figures 1 to 4 The pressure vessel 10 is used for seating the crown plug 200 and pressure testing the crown plug 200; the driving tool 20 is arranged on the pressure vessel 10 in the first direction, and is used for sending the crown plug 200 into the pressure vessel 10 and seating the crown plug 200 on the seating step 111 in the central hole of the pressure vessel 10; the sealing cover 30 is arranged on the pressure vessel 10 and is used for sealing the annular gap between the driving tool 20 and the pressure vessel 10; the crown plug test device 100 for underwater Christmas tree is configured to drive the locking block 202 of the driving cylinder 201 of the crown plug 200 to open the crown plug 200 in a direction, so as to be locked on the locking profile 112 in the central hole.

[0041] In the above arrangement, the pressure vessel 10 is arranged to seal the crown plug 200 in a closed space. In this way, the crown plug 200 can be sealed and pressure tested. The driving tool 20 is arranged to send the crown plug 200 into the pressure vessel 10 and seat the crown plug 200 on the seating step 111 in the central hole of the pressure vessel 10. In this way, the crown plug 200 can be simulated to be seated in the inner hole of the Christmas tree cap or the tubing hanger. Thus, the simulated pressure test of the crown plug 200 is realized. At the same time, the accuracy and reliability of the test are improved.

[0042] Specifically, as shown in the drawings, Figures 1 to 4As shown in the drawings, in one embodiment, the pressure test container 10 comprises a pressure test cylinder 11, a first connecting flange 12, a second connecting flange 13 and a threaded fastener 14. Among them, the pressure test cylinder 11 is provided with a seating step 111 and a locking profile 112 in the inner hole thereof, and the locking profile 112 is located above the seating step 111; the first connecting flange 12 is arranged on one end of the pressure test cylinder 11; the second connecting flange 13 is arranged on the other end of the pressure test cylinder 11; the threaded fastener 14 is threaded on one end of the first connecting flange 12 and the pressure test cylinder 11, and on the other end of the second connecting flange 13 and the pressure test cylinder 11, and is used to fix the first connecting flange 12 and the second connecting flange 13 on the two ends of the pressure test cylinder 11 respectively; and the sealing element 15 is arranged at the connection between the first connecting flange 12 and the pressure test cylinder 11, and at the connection between the second connecting flange 13 and the pressure test cylinder 11.

[0043] In the above arrangement, the first test channel 16 and the second test channel 17 are arranged on the outer periphery of the pressure test cylinder 11, both of which communicate with the inner hole of the pressure test cylinder 11, the first test channel 16 is located above the locking profile 112 and is used to test the sealing pressure of the upper end of the crown plug 200, and the second test channel 17 is located below the locking profile 112 and is used to test the sealing pressure of the lower end of the crown plug 200. In this way, the crown plug 200 can be pressure tested from two directions. Thus, the sealing performance of the crown plug 200 can be tested.

[0044] Specifically, as shown in the drawings, Figures 1 to 4 In one embodiment, a first annular sealing groove is arranged at the connection between the first connecting flange 12 and the pressure test cylinder 11, and the sealing element 15 is arranged in the first annular sealing groove.

[0045] Specifically, as shown in the drawings, Figures 1 to 4 In one embodiment, a second annular sealing groove is arranged at the connection between the second connecting flange 13 and the pressure test cylinder 11, and the sealing element 15 is arranged in the second annular sealing groove.

[0046] Specifically, as shown in the drawings, Figures 1 to 4 In one embodiment, the threaded fastener 14 comprises a locking stud and a locking nut, the locking stud is threaded on the first connecting flange 12 and the pressure test cylinder 11, and the locking nut is screwed on the end of the locking stud exposed from the first connecting flange 12, and the locking stud is threaded on the second connecting flange 13 and the pressure test cylinder 11, and the locking nut is screwed on the end of the locking stud exposed from the second connecting flange 13.

[0047] Specifically, as shown in the drawings, Figures 1 to 4As shown in the drawings, in one embodiment, the first connecting flange 12 is provided with a central threaded hole which is concentric with the inner hole of the pressure testing cylinder 11, and the driving tool 20 comprises a screw rod 21, a pressing disc 22 and a screwing disc 23. Among them, the screw rod 21 is threadedly matched with the central threaded hole; the pressing disc 22 is arranged on one end of the screw rod 21, and is used for pressing down the driving cylinder 201; the screwing disc 23 is arranged on the other end of the screw rod 21; the crown plug testing device 100 for the underwater Christmas tree is configured to rotate the screwing disc 23 to enable the screw rod 21 to rotate and drive the pressing disc 22 to press down the driving cylinder 201, so that the locking block 202 is opened to the locking profile 112 locked in the central hole.

[0048] Specifically, as shown in the drawings, Figures 1 to 4 In one embodiment, the screw rod 21, the pressing disc 22 and the screwing disc 23 are of an integrated structure. In this way, the manufacturing of the driving tool 20 is facilitated, thereby improving the manufacturing efficiency thereof.

[0049] Specifically, as shown in the drawings, Figures 1 to 4 In one embodiment, the sealing cover 30 comprises a cover body 31 and a sealing gasket 32. Among them, the cover body 31 is arranged on the first connecting flange 12, the threaded fastener 14 is arranged on the first connecting flange 12, the cover body 31 and the pressure testing cylinder 11, and is used for fixing the first connecting flange 12, the cover body 31 and the pressure testing cylinder 11 into an integrated body; the sealing gasket 32 is arranged at the connection between the cover body 31 and the first connecting flange 12, and is used for sealing the gap between the cover body 31 and the first connecting flange 12.

[0050] Specifically, as shown in the drawings, Figures 1 to 4 In one embodiment, the cover body 31 comprises a cavity and a connecting flange disc arranged at the opening of the cavity, the threaded fastener 14 is used for fixing the flange disc, the first connecting flange 12 and the pressure testing cylinder 11 into an integrated body, and the sealing gasket 32 is used for sealing the gap between the flange disc and the first connecting flange 12.

[0051] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, as long as there is no structural conflict, each of the technical features mentioned in each of the embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A crown plug testing device for an underwater Christmas tree, characterized in that, The device comprises: a pressure container for seating a crown plug and testing the crown plug; a driving tool arranged on the pressure container in a first direction, the driving tool being used for sending the crown plug into the pressure container and seating the crown plug on a seating step in a central hole of the pressure container; a sealing cover arranged on the pressure container, the sealing cover being used for sealing an annular gap between the driving tool and the pressure container; wherein the device is configured to drive a driving cylinder of the driving tool to drive the locking block of the crown plug to lock on a locking profile in the central hole by pressing the driving tool in a direction.

2. The crown block test apparatus for a subsea Christmas tree according to claim 1, wherein, The pressure container comprises: a testing cylinder having the seating step and the locking profile arranged in an inner hole of the testing cylinder, the locking profile being above the seating step; and a first connecting flange arranged on one end of the testing cylinder; and a second connecting flange arranged on the other end of the testing cylinder; a threaded fastener arranged on the first connecting flange and the one end of the testing cylinder, and the second connecting flange and the other end of the testing cylinder, the threaded fastener being used for fixing the first connecting flange and the second connecting flange on the two ends of the testing cylinder respectively; a sealing member arranged at the connection between the first connecting flange and the testing cylinder, and the connection between the second connecting flange and the testing cylinder; wherein a first testing channel and a second testing channel are arranged on the outer periphery of the testing cylinder, the first testing channel and the second testing channel both communicating with the inner hole of the testing cylinder, the first testing channel being above the locking profile for testing the sealing pressure of the upper end of the crown plug, and the second testing channel being below the locking profile for testing the sealing pressure of the lower end of the crown plug.

3. The crown block test apparatus for a subsea Christmas tree according to claim 2, wherein, The connection between the first connecting flange and the testing cylinder is provided with a first annular sealing groove, and the sealing member is arranged in the first annular sealing groove.

4. The crown block test apparatus for a subsea Christmas tree according to claim 2, wherein The connection between the second connecting flange and the testing cylinder is provided with a second annular sealing groove, and the sealing member is arranged in the second annular sealing groove.

5. The crown block test apparatus for a subsea Christmas tree according to claim 2, wherein, The threaded fastener comprises a locking stud and a locking nut, the locking stud being arranged on the first connecting flange and the testing cylinder, and the locking nut being screwed on the one end of the locking stud exposed from the first connecting flange, the locking stud being arranged on the second connecting flange and the testing cylinder, and the locking nut being screwed on the one end of the locking stud exposed from the second connecting flange.

6. The crown block test apparatus for a subsea Christmas tree according to claim 2, wherein, The first connecting flange is provided with a central threaded hole, the central threaded hole being concentric with the inner hole of the testing cylinder, and the driving tool comprises: a screw rod threadedly matched with the central threaded hole; and a pressing disc arranged on one end of the screw rod, the pressing disc being used for pressing the driving cylinder; and a screwing disc arranged on the other end of the screw rod. The crown-shaped plug testing device for the underwater Christmas tree is configured such that rotating the screwing disc can rotate the screw rod and drive the lower pressing disc to press the driving cylinder, so that the lock block is opened from the locking profile in the central hole.

7. The crown block test apparatus for a subsea Christmas tree according to claim 6, wherein, The screw rod, the lower pressing disc and the screwing disc are integrated.

8. The crown block test apparatus for a subsea Christmas tree according to claim 6, wherein, The sealing cover comprises: a cover body arranged on the first connecting flange, and the threaded fastener is arranged through the first connecting flange, the cover body and the pressure testing cylinder to fix the first connecting flange, the cover body and the pressure testing cylinder as a whole; a sealing gasket arranged at the joint of the cover body and the first connecting flange to seal the gap between the cover body and the first connecting flange.

9. The crown block test apparatus for a subsea Christmas tree according to claim 8, wherein, The cover body comprises a cavity and a connecting flange disc arranged at the opening of the cavity, the threaded fastener is arranged to fix the flange disc, the first connecting flange and the pressure testing cylinder as a whole, and the sealing gasket is arranged to seal the gap between the flange disc and the first connecting flange. The cover body comprises a cavity and a connecting flange disc arranged at the opening of the cavity, the threaded fastener is arranged to fix the flange disc, the first connecting flange and the pressure testing cylinder as a whole, and the sealing gasket is arranged to seal the gap between the flange disc and the first connecting flange.

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