Pressure testing tool and pressure testing device for double-ram blowout preventer

Abstract

The utility model provides a pressure testing tool for a double-ram blowout preventer, which comprises a polish rod and a driving mechanism arranged at the top end of the polish rod, the driving mechanism comprises a torque wrench turntable, a wrench matched with the torque wrench turntable, and a screwed plug arranged at the bottom end of the polish rod and used for being matched with the double-ram blowout preventer.

Description

Technical Field

[0001] The utility model relates to the field of on-site pressure testing tools for oilfield wellhead blowout preventers, in particular to a pressure testing tool for a double-gate blowout preventer and a pressure testing device. Background Art

[0002] At present, the existing process tools in oil fields cannot meet the requirements of pressure testing of the semi-closed gate before the completion of the wellhead by mechanical pumping, and accidents of semi-closed leakage are prone to occur during the test pumping. There are three factors that affect the sealing of the semi-closed gate of the double gate blowout preventer in the mechanical pumping well: the first is the seal between the front seal and the rod column, the shell and the front seal; the second is the seal between the gate top seal and the shell, these two seals form the initial seal; the third is that when there is pressure in the well, the well pressure pushes the gate front seal from the rear of the gate to further squeeze and deform, and at the same time, the well pressure pushes the gate from the bottom to float up and close to the upper sealing surface of the shell, thereby forming a reliable seal, which is called the well pressure assisted sealing effect.

[0003] However, if the pressure test is conducted from top to bottom, the well pressure-assisted sealing cannot be achieved, and it is very easy to cause a loose seal. At present, the oil field mechanical pumping well usually adopts a tubular thickening pump, so there will be a gap between the pump barrel and the plunger, which does not meet the pressure test requirements.

[0004] Therefore, it is desired in the art to provide a pressure testing tool for a double-gate blowout preventer to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a pressure test tool for a double-gate blowout preventer, which can extend from top to bottom into the double-gate blowout preventer, thereby forming a sealed connection with the oil pipe through the oil pipe hanger, and then completing the work of closing the semi-closed gate, and then pressure testing will be carried out on the two wings of the oil tree.

[0006] According to a first aspect of the utility model, a pressure test tool for a double-gate blowout preventer is provided, comprising a polished rod,

[0007] A driving mechanism is arranged at the top end of the polished rod, the driving mechanism comprising a torque wrench turntable and a wrench adapted to the torque wrench turntable, and

[0008] A thread plug is arranged at the bottom end of the polished rod and is used to match the double-gate blowout preventer.

[0009] In one embodiment, the torque wrench dial is configured as a cylindrical structure.

[0010] In one embodiment, at least four reserved grooves arranged at intervals are provided along the circumference of the torque wrench rotary disc.

[0011] In one embodiment, the wrench is threadedly connected to the reserved groove.

[0012] In one embodiment, a wear-resistant portion is provided on the outer wall surface of the wrench.

[0013] In one embodiment, the wear-resistant portion is configured as any one of a wear-resistant sleeve and a wear-resistant thread.

[0014] In one embodiment, a welding opening is provided at one end of the polished rod away from the torque wrench turntable, and the screw plug is configured as a barrel-shaped structure and fixed outside the welding opening.

[0015] In one embodiment, the plug is a 76mm BPV button-type plug.

[0016] According to a second aspect of the utility model, a pressure test device is provided, comprising a double-gate blowout preventer, an oil pipe arranged in the double-gate blowout preventer, and a pressure test tool as described above which is sealedly connected to the oil pipe through an oil pipe hanger.

[0017] In one embodiment, an internal thread which forms a threaded connection with the thread plug is provided in the oil pipe hanger.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] First, the utility model can complete the double-gate half-closed pressure test to avoid the risk of well control caused by long-term high-pressure production wells being half-closed without pressure test. In other words, the utility model can extend from top to bottom into the double-gate blowout preventer, thereby forming a sealed connection with the oil pipe through the oil pipe hanger, and then complete the work of closing the half-closed gate, and then pressure test will be carried out on the two wings of the oil tree. Preferably, such a simple operation can eliminate hidden dangers for the long-term stable production of the pumping well.

[0020] Secondly, the utility model has good sealing performance, low operating difficulty, low processing cost, and can solve the problem that the tubular thickening pump cannot be pressure tested, thereby ensuring the long-term stable production of the machine-pumping well, and has broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 An exploded view of a pressure test tool for a double-gate blowout preventer according to the utility model;

[0023] Figure 2 for Figure 1 A partial view of

[0024] Figure 3 The structure of the pressure testing device according to the utility model is schematically shown.

[0025] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0026] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0027] The utility model will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 The figure is an exploded view of a pressure testing tool for a double-gate blowout preventer according to the utility model.

[0029] Figure 2 for Figure 1 A partial view of the .

[0030] like Figure 1 and 2 As shown, the pressure test tool 100 for the double gate blowout preventer according to the utility model mainly includes a polished rod 10, and a driving mechanism arranged at the top of the polished rod 10. Preferably, the driving mechanism includes a torque wrench turntable 11 and a wrench 12, wherein the torque wrench turntable 11 is configured as a cylindrical structure, and the torque wrench turntable 11 is fixed at the top of the polished rod 10, and the wrench 12 is adapted to the torque wrench turntable 11, so that the rotation torque can be more easily applied to the polished rod 10 through the wrench 12 to complete the plugging work of the oil pipe 22, and its content is introduced below.

[0031] In one embodiment, Figure 1 and 2 As shown, at least four reserved grooves 111 are arranged along the circumference of the torque wrench rotating disk 11. Preferably, the four reserved grooves 111 are arranged at intervals, in other words, an angle of 90° is formed between adjacent reserved grooves 111. In this way, the wrenches 12 installed on the reserved grooves 111 can have sufficient spacing between each other so that the wrenches 12 can more easily apply rotational torque to the polished rod 10.

[0032] In other embodiments, the reserved grooves 111 may be more or smaller, as long as they can help apply a rotational torque to the polished rod 10 through the wrench 12 .

[0033] Preferably, the wrench 12 is threadedly connected to the reserved groove 111. In this way, not only can the firmness between the wrench 12 and the torque wrench rotating disk 111 be effectively improved, but also the installation and removal speed of the wrench 12 can be improved to further improve the efficiency of construction.

[0034] In one embodiment, Figure 1 and 2 As shown, a wear-resistant portion 121 is provided on the outer wall surface of the wrench 12. Preferably, the wear-resistant portion 121 is configured as any one of a wear-resistant sleeve and a wear-resistant thread. Therefore, in this way, the friction between the hand and the wrench 12 can be effectively increased to help the construction personnel apply a rotational torque to the polished rod 10.

[0035] According to the utility model, if Figure 1 As shown, the pressure test tool 100 for the double-ram blowout preventer further includes a plug 13 disposed on the polished rod 10. Preferably, the pressure test tool 100 for the double-ram blowout preventer can form a sealed connection with a tubing hanger 221 (described below) in the double-ram blowout preventer 21 (described below) through the plug 13, so as to provide a good sealing space for the pressure test process.

[0036] In one embodiment, Figure 1 As shown, a plug welding port 14 is provided at one end of the polished rod 10 away from the torque wrench rotary disc 11. Preferably, the plug 13 is configured as a barrel-shaped structure and is fixedly installed outside the plug welding port 14. Therefore, when the polished rod 10 is inserted into the double-gate blowout preventer 21, it can more easily form a sealed connection with the oil pipe hanger 221, thereby completing the work of closing the semi-closed gate, and then the pressure test will be carried out on the two wings of the Christmas tree.

[0037] Preferably, the Christmas tree is connected to the oil pipe 22 via a production spool 23 .

[0038] In one embodiment of the present invention, the plug 13 is a 76mm BPV thread plug. Therefore, the plug 13 can be threadedly connected with the oil pipe hanger 221 to achieve sealing of the oil pipe 22, and further complete the work of closing the semi-sealed gate.

[0039] Figure 3 The structure of the pressure testing device 200 according to the present invention is schematically shown.

[0040] like Figure 3As shown, according to the second aspect of the utility model, a pressure test device 200 is provided, which mainly includes a double-gate blowout preventer 21 and an oil pipe 22, wherein the oil pipe 22 is longitudinally arranged in the double-gate blowout preventer 21. Preferably, the pressure test tool 100 for the double-gate blowout preventer can extend from top to bottom into the double-gate blowout preventer 21, thereby forming a sealed connection with the oil pipe 22 through the oil pipe hanger 221, and then completing the work of closing the semi-closed gate, and then the pressure test will be carried out on the two wings of the Christmas tree.

[0041] Preferably, the oil pipe hanger 221 is arranged at the upper end surface of the oil pipe 22, so that it can more easily form a sealed connection with the thread plug 13 on the polished rod 10 to achieve the purpose of closing the semi-closed gate.

[0042] In one embodiment, an inner thread (not shown) is provided in the oil pipe hanger to form a threaded connection with the thread plug 13 .

[0043] Compared with the prior art, the advantages of the present invention are:

[0044] First, the utility model can complete the double-gate half-closed pressure test to avoid the risk of well control caused by long-term high-pressure production wells being half-closed without pressure test. In other words, the utility model can extend from top to bottom into the double-gate blowout preventer 21, thereby forming a sealed connection with the oil pipe 22 through the oil pipe hanger 221, and then completing the work of closing the half-closed gate, and then pressure testing will be carried out on the two wings of the oil tree. Preferably, such a simple operation can eliminate hidden dangers for the long-term stable production of the pumping well.

[0045] Secondly, the utility model has good sealing performance, low operating difficulty, low processing cost, and can solve the problem that the tubular thickening pump cannot be pressure tested, thereby ensuring the long-term stable production of the machine-pumping well, and has broad prospects for promotion and application.

[0046] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0047] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0048] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A pressure test tool for a double-gate blowout preventer, characterized in that: include: Bare rod (10), A driving mechanism is arranged at the top end of the polished rod (10), the driving mechanism comprising a torque wrench turntable (11), and a wrench (12) adapted to the torque wrench turntable (11), and A thread plug (13) is arranged at the bottom end of the polished rod (10) and is used to match the double-gate blowout preventer (21).

2. The pressure testing tool for a double-gate blowout preventer according to claim 1, characterized in that: The torque wrench rotary disc (11) is configured as a cylindrical structure.

3. The pressure testing tool for a double-gate blowout preventer according to claim 2, characterized in that: At least four reserved grooves (111) arranged at intervals are provided along the circumference of the torque wrench rotary disc (11).

4. The pressure testing tool for a double-gate blowout preventer according to claim 3, characterized in that: The wrench (12) is threadedly connected to the reserved groove (111).

5. The pressure testing tool for a double-gate blowout preventer according to claim 4, characterized in that: A wear-resistant portion (121) is provided on the outer wall surface of the wrench (12).

6. The pressure testing tool for a double-gate blowout preventer according to claim 5, characterized in that: The wear-resistant portion (121) is configured as any one of a wear-resistant sleeve and a wear-resistant thread.

7. The pressure testing tool for a double-gate blowout preventer according to claim 6, characterized in that: A plug welding opening (14) is provided at one end of the polished rod (10) away from the torque wrench rotary disc (11), and the screw plug (13) is configured as a barrel-shaped structure and is fixed outside the plug welding opening (14).

8. The pressure testing tool for a double-gate blowout preventer according to claim 7, characterized in that: The thread plug (13) is a 76mm BPV buckle-type thread plug.

9. A pressure test device, characterized in that: The invention comprises a double-gate blowout preventer (21), an oil pipe (22) arranged in the double-gate blowout preventer, and a pressure test tool according to any one of claims 1 to 8 which is sealedly connected to the oil pipe (22) via an oil pipe hanger (221).

10. The pressure test device according to claim 9, characterized in that: An internal thread which is threadedly connected to the thread plug (13) is provided in the oil pipe hanger (221).

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