SFZ18-14 blowout preventer pressure testing device without disassembly

Abstract

This invention provides a non-disassembly pressure testing device for SFZ18-14 blowout preventers, relating to the field of safety performance testing of well control equipment in oilfield production engineering systems. This non-disassembly pressure testing device for SFZ18-14 blowout preventers includes a skid, a blowout preventer, a gantry slide, a testing flange, an upper hydraulic cylinder, bolts, a flange ring groove, hydraulic clamps, and a screw connected to the testing short circuit. Screws are fixedly connected to both the front and rear sides of the top of the skid. An upper hydraulic cylinder is fixedly connected to the middle of the upper end of the screw, and a bolt is fixedly connected to the middle of the upper end of the upper hydraulic cylinder. The testing flange is fixedly connected to the middle of the upper end of the bolt. The device significantly improves the safety of pressure relief compared to previous methods, effectively avoiding safety risks caused by human error and achieving inherent safety of the device. The pressure testing process eliminates the need for manual bolt disassembly, effectively reducing the labor intensity of employees. The improved testing efficiency effectively supplements the gap in oilfield well control equipment testing.

Description

Technical Field

[0001] This invention relates to the field of safety performance testing of well control equipment in oilfield production engineering systems, specifically to a pressure testing device for SFZ18-14 blowout preventer without disassembly. Background Technology

[0002] Petroleum is a viscous, dark brown liquid, often referred to as "lifeblood" for industrial applications. When collecting it, oilfield exploration is required. After exploration, oil is extracted, necessitating pressure testing using a blowout preventer (BOP) to ensure the safety performance of the well control equipment and allow for subsequent oil production. The BOP is used to close the wellhead during well testing, workover, and completion operations, preventing blowouts. It's a commonly used safety wellhead sealing device in oilfields. To ensure proper operation, BOPs need periodic maintenance and repairs in the well control workshop. The most important maintenance is pressure testing. During pressure testing, the BOP is installed on a testing device, and high-pressure liquid is injected to observe for leaks and the maximum pressure it can withstand.

[0003] The demand for testing SFZ18-14 blowout preventers is high. Due to the limitations of the lower flange parameters of the SFZ18-14 blowout preventer, a quick hydraulic clamp connection is not possible. Instead, a combined pressure test using hydraulic clamps is required. This involves installing a conversion sub, with the upper end connected to the SFZ18-14 blowout preventer using 12 wellhead bolts, and the lower end placed on the hydraulic clamps. This method can only test a single blowout preventer of a single specification, requiring manual disassembly and reassembly of all 12 bolts, resulting in high labor intensity and low efficiency. Furthermore, the lack of a dedicated, non-disassembly pressure testing device for the SFZ18-14 blowout preventer makes it impossible to fully guarantee the safety performance testing needs of oilfield well control equipment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a non-disassembly pressure testing device for the SFZ18-14 blowout preventer. This solves the problems of: pressure testing is limited by the lower flange parameters of the SFZ18-14 blowout preventer, preventing the use of hydraulic clamping for quick connection; pressure testing of single blowout preventers of a single specification requires manual disassembly and reassembly of all 12 bolts, resulting in high labor intensity and low efficiency; and the lack of a dedicated non-disassembly pressure testing device for the SFZ18-14 blowout preventer fails to fully guarantee the safety performance testing needs of oilfield well control equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an SFZ18-14 blowout preventer pressure testing device without disassembly, comprising a skid, a blowout preventer, a gantry slide, a testing flange, an upper hydraulic cylinder, bolts, a flange ring groove, a hydraulic clamp, and a screw and a testing short connector. The skid is fixedly connected to a screw on both the front and rear sides of its top. An upper hydraulic cylinder is fixedly connected to the middle of the upper end of the screw. A bolt is fixedly connected to the middle of the upper end of the upper hydraulic cylinder. A testing flange is fixedly connected to the middle of the upper end of the bolt. The blowout preventer is fixedly connected to the middle of the upper end of the testing flange. A testing short connector is fixedly connected to the middle of the upper end of the blowout preventer. A flange ring groove is fixedly connected to the middle of the upper end of the testing short connector. A hydraulic clamp is fixedly connected to the middle of the upper end of the flange ring groove. A gantry slide is fixedly connected to the middle of the upper end of the hydraulic clamp.

[0006] Preferably, a base plate is provided at the lower center of the gantry slide, and positioning pins are provided on both sides of the bottom of the test pressure short connector. The base plate is connected to the upper hydraulic cylinder by a screw, and the screw passes through the skid and is located at the bottom of the skid.

[0007] Preferably, the test flange is circular, and a locating pin is fixedly connected to the middle of the upper end of the test flange, and a blowout preventer is fixedly connected to the middle of the upper end of the locating pin.

[0008] Preferably, the upper hydraulic cylinder and the pressure testing flange are fixed together by bolts, with the bolts located below the locating pins.

[0009] Preferably, a gantry slide is provided at the middle of the upper end of the pry bar, and a base plate is fixedly connected to the bottom of the pry bar.

[0010] Preferably, the blowout preventer is fixedly connected to the test flange by a locating pin, and a bolt is provided at the lower center of the locating pin.

[0011] Preferably, the bolt is a fully threaded bolt, and a gantry slide is provided on both the left and right sides of the bolt, with flange steel ring grooves provided on the upper and lower sides of the gantry slide.

[0012] Preferably, the upper cylinder has a stroke of 200mm and is located above the skid.

[0013] The method of using the SFZ18-14 blowout preventer pressure testing device without disassembly includes the following steps: S1. After the personnel install the blowout preventer on the test flange using the positioning pin, the test flange is then connected to the upper hydraulic cylinder using bolts. At the same time, the skid and the upper hydraulic cylinder are connected to the base plate by screws, so that it can be used more stably. S2. Then, the personnel need to move the gantry slide table directly above the blowout preventer, and then place the positioning pin under the flange steel ring groove. At the same time, the blowout preventer is clamped by the upper hydraulic cylinder so that it can be pressure tested. Then, in order to seal, the flange steel ring groove will be used to seal it. S3, then connected in parallel with the hydraulic clamps installed on the gantry slide, and then personnel can set up an independent control unit so that it can perform pressure testing operations at the same time.

[0014] This invention provides a pressure testing device for the SFZ18-14 blowout preventer that does not require disassembly. It has the following beneficial effects: This invention involves hoisting the blowout preventer (BOP) onto the test flange, moving the trolley directly above the BOP, and then inserting the test short connector. The BOP is then clamped by an upper hydraulic cylinder to achieve the pressure test. The seal utilizes a flange steel ring groove seal. It operates in parallel with existing hydraulic clamp test fixtures, with a separate independent control unit, allowing for simultaneous pressure testing. The subsequent depressurization safety of the device is significantly improved compared to previous methods, effectively avoiding safety risks caused by human error and achieving inherent safety of the device. No manual disassembly or reassembly of bolts is required during the pressure test, effectively reducing the labor intensity of employees. The improved testing efficiency effectively fills the gap in oilfield well control equipment testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the pry bar of the present invention; Figure 4 This is a bottom view of the pressure testing flange structure of the present invention; Figure 5 This is a schematic diagram of the main structure of the gantry slide of the present invention; Figure 6 This is a side view of the pry bar structure of the present invention.

[0016] The components include: 1. Skid mount; 2. Blowout preventer; 3. Gantry slide; 4. Pressure test flange; 5. Top hydraulic cylinder; 6. Bolt; 7. Flange ring groove; 8. Hydraulic clamp; 9. Base plate; 10. Screw; 11. Pressure test short joint; 12. Positioning pin. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0018] like Figure 1-6 As shown, this embodiment of the invention provides a non-disassembly pressure testing device for the SFZ18-14 blowout preventer, including a skid 1, a blowout preventer 2, a gantry slide 3, a pressure testing flange 4, an upper hydraulic cylinder 5, bolts 6, a flange ring groove 7, a hydraulic clamp 8, a screw 10, and a pressure testing short connector 11. The key feature is that screws 10 are fixedly connected to both the front and rear sides of the top of the skid 1, and an upper hydraulic cylinder 5 is fixedly connected to the middle of the upper end of the screw 10. Bolts 6 are fixedly connected to the middle of the upper end of the upper hydraulic cylinder 5. The unit is fixedly connected to a test flange 4. A blowout preventer 2 is fixedly connected to the upper middle part of the test flange 4. A test short connector 11 is fixedly connected to the upper middle part of the blowout preventer 2. A flange ring groove 7 is fixedly connected to the upper middle part of the test short connector 11. A hydraulic clamp 8 is fixedly connected to the upper middle part of the flange ring groove 7. A gantry slide 3 is fixedly connected to the upper middle part of the hydraulic clamp 8, allowing it to slide through the gantry slide 3, thus enabling better pressure testing and facilitating personnel operation.

[0019] A base plate 9 is provided at the lower center of the gantry slide table 3. Positioning pins 12 are provided on both sides of the bottom of the test pressure short connector 11. The base plate 9 is connected to the upper cylinder 5 through the screw 10. The screw 10 passes through the pry bar 1 and is located at the bottom of the pry bar 1 so that it can support the upper cylinder 5. This will make it more stable during use and prevent shaking.

[0020] The test flange 4 is circular, and a positioning pin 12 is fixedly connected to the middle of the upper end of the test flange 4. A blowout preventer 2 is fixedly connected to the middle of the upper end of the positioning pin 12, so that personnel can quickly and stably install the blowout preventer 2 through the positioning pin 12.

[0021] The upper hydraulic cylinder 5 and the pressure testing flange 4 are installed and fixed by bolts 6. Bolts 6 are located below the positioning pin 12. The upper hydraulic cylinder 5 is installed by bolts 6 so that it can be used stably during use, and at the same time, the sliding phenomenon of the pry bar 1 is reduced when the gantry slide table 3 moves.

[0022] A gantry slide 3 is provided at the upper middle part of the pry bar 1, and a base plate 9 is fixedly connected to the bottom of the pry bar 1.

[0023] The blowout preventer 2 and the test flange 4 are fixedly connected by a locating pin 12. A bolt 6 is provided at the lower center of the locating pin 12 to enable more precise docking.

[0024] Bolt 6 is a fully threaded bolt. A gantry slide 3 is provided on the left and right sides of bolt 6, which are far apart from each other. A flange ring groove 7 is provided on the upper and lower sides of the gantry slide 3 to reduce gas leakage during pressure testing, which would prevent personnel from performing standard pressure testing, and at the same time increase the stability of pressure testing.

[0025] The upper cylinder 5 has a stroke of 200mm. The upper cylinder 5 is located above the skid 1. It can be seen that the height difference of different blowout preventers 2 is about 100mm. With the upper cylinder stroke of 200mm reserved, it can meet the quick tooling requirements of the three types of blowout preventers 2.

[0026] The method of using the SFZ18-14 blowout preventer pressure testing device without disassembly includes the following steps: S1. After the personnel install the blowout preventer 2 on the test flange 4 through the positioning pin 12, the test flange 4 can be connected to the upper cylinder 5 through the bolt 6. At the same time, the skid 1 and the upper cylinder 5 are connected to the base plate 9 through the screw 10, so that it can be used more stably. S2. Then, the personnel need to move the gantry slide 3 to the top of the blowout preventer 2. Then, the positioning pin 12 is placed under the flange ring groove 7. At the same time, the blowout preventer 2 is clamped by the upper cylinder 5 so that it can be pressure tested. Then, in order to seal, the flange ring groove 7 will be used to seal it. The specifications of the blowout preventer 2 can be divided into double flange type with a total height of 345mm, upper petal type with lower thread and flange type with a total height of 240mm, and upper flange type with lower thread and flange type with a total height of 245mm. The personnel can quickly tool the above three types of blowout preventers 2 according to the reserved upper lifting distance and the upper cylinder stroke of 200mm. S3, then connected in parallel with the hydraulic clamp 8 installed on the gantry slide 3, and then personnel can set up an independent control unit so that it can perform pressure testing operations at the same time.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A SFZ18-14 blowout preventer disassembly-free pressure testing device, comprising a pry seat (1), a blowout preventer (2), a gantry sliding table (3), a pressure testing flange (4), an upper jacking oil cylinder (5), a bolt (6), a flange ring steel ring groove (7), a hydraulic clamp (8), a screw rod (10), and a pressure testing short circuit (11), characterized in that: The top of the pry bar (1) is fixedly connected to a screw (10) on both the front and back sides. The upper part of the screw (10) is fixedly connected to an upper cylinder (5). The upper part of the upper cylinder (5) is fixedly connected to a bolt (6). The upper part of the bolt (6) is fixedly connected to a test flange (4). The upper part of the test flange (4) is fixedly connected to a blowout preventer (2). The upper part of the blowout preventer (2) is fixedly connected to a test short connector (11). The upper part of the test short connector (11) is fixedly connected to a flange ring groove (7). The upper part of the flange ring groove (7) is fixedly connected to a hydraulic clamp (8). The upper part of the hydraulic clamp (8) is fixedly connected to a gantry slide (3).

2. The SFZ18-14 blowout preventer pressure testing device without disassembly as described in claim 1, characterized in that: The lower middle part of the gantry slide (3) is provided with a base plate (9), and the bottom sides of the test pressure short connector (11) are provided with positioning pins (12). The base plate (9) is connected to the upper top oil cylinder (5) through a screw (10), and the screw (10) passes through the pry bar (1).

3. The SFZ18-14 blowout preventer pressure testing device without disassembly as described in claim 1, characterized in that: The test flange (4) is circular, and a positioning pin (12) is fixedly connected to the middle of the upper end of the test flange (4). A blowout preventer (2) is fixedly connected to the middle of the upper end of the positioning pin (12).

4. The SFZ18-14 blowout preventer pressure testing device without disassembly as described in claim 1, characterized in that: The bottom of the pry bar (1) is fixedly connected to a base plate (9).

5. The SFZ18-14 blowout preventer pressure testing device without disassembly as described in claim 1, characterized in that: The blowout preventer (2) is fixedly connected to the test flange (4) by a locating pin (12).

6. The SFZ18-14 blowout preventer pressure testing device without disassembly as described in claim 1, characterized in that: The bolt (6) is a fully threaded screw.

7. The SFZ18-14 blowout preventer pressure testing device without disassembly as described in claim 1, characterized in that: The upper cylinder (5) has a stroke of 200mm and is located above the pry bar (1).

8. The method of using the SFZ18-14 blowout preventer pressure testing device without disassembly, characterized in that: The method of using the SFZ18-14 blowout preventer pressure testing device without disassembly according to any one of claims 1-7 includes the following steps: S1. The personnel install the blowout preventer (2) on the test flange (4) through the positioning pin (12), and then connect the test flange (4) to the upper cylinder (5) through the bolt (6). At the same time, the pry bar (1) and the upper cylinder (5) are connected to the base plate (9) through the screw (10) so that it can be used more stably. S2. Then the personnel moved the gantry slide (3) directly above the blowout preventer (2), and then placed the positioning pin (12) below the flange steel ring groove (7). At the same time, the blowout preventer (2) was clamped by the upper cylinder (5) so that it could be pressure tested. Then the flange steel ring groove (7) was used to seal it. S3, then connected in parallel with the hydraulic clamp (8) installed on the gantry slide (3), and then personnel set up an independent control unit so that it can perform pressure testing operations at the same time.

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