CN205370461U - Connection device for BOP pressure test tool - Google Patents

Abstract

The utility model discloses a connecting device for preventer pressure testing instrument belongs to petroleum engineering's borehole operation instrument technical field. The first end of the connecting device is connected with a tubing coupling in the blowout preventer pressure testing tool, a square rod head is arranged in an inner cavity of the tubing coupling, a square rod head section of the square rod head protruding out of the tubing coupling is accommodated in the first end of the connecting device, and the second end, opposite to the first end, of the connecting device is connected with a pipeline joint of the pressure testing pump. The utility model provides a four directions pole head that is arranged in preventer pressure testing instrument's connecting device's appearance pole cavity can hold among the special pressure testing instrument of preventer exposes length in the tubing coupling to the combination that will required conventionality becomes to detain and the tubing nipple joint of a area hoop simplifies to a small and exquisite whole in the past, with solve from big footpath and contain the tubing coupling that exposes four directions pole head to the problem of the hydraulic hose connector between the path connecting element many, complex operation and extravagant material.

Description

Connection device for BOP pressure test tool

technical field

The utility model relates to the technical field of downhole operation tools for petroleum engineering, in particular to a connection device for a blowout preventer pressure test tool.

Background technique

According to the well control requirements of the industry, before operating the pipe string in the downhole operation, the wellhead must be equipped with a blowout preventer and the pressure test must be qualified. In 2010, the patent name was a special pressure test tool for blowout preventers (patent number ZL201020199106.6), which disclosed a conical plug, a central rod, a safety stop, a short joint of oil pipe, a liquid hole, a square rod head, The oil pipe coupling is composed of the plug and the short joint of the oil pipe, which are put in or taken out synchronously, which shortens the operation time.

With the progress of the times, the cement truck used for hydraulic pressure test has been changed to a small manual or hydraulic pressure test pump. Therefore, in the field practice process, it is necessary to connect the above-mentioned BOP special pressure test tool with a small manual or hydraulic pressure test pump, so that the oil pipe coupling with a large diameter and the small diameter of the manual or hydraulic pressure test pump There is a new problem in the connection between the hydraulic hose joints: because the conventional variable buckle cannot be directly connected to the oil pipe coupling due to the exposed square rod head, another short joint of the oil pipe with a coupling is required for transition, resulting in The operation is cumbersome and wastes material.

Utility model content

In order to solve at least one aspect of the above-mentioned problems and defects in the prior art, the utility model provides a connection device for a blowout preventer pressure test tool. Described technical scheme is as follows:

One object of the present utility model is to provide a connection device for a blowout preventer pressure test tool.

According to one aspect of the present invention, a connection device for a blowout preventer pressure test tool is provided, the first end of the connection device is connected to the oil pipe collar in the blowout preventer pressure test tool, the A square rod head is arranged in the inner cavity of the oil pipe coupling, and the square rod head section of the square rod head protruding from the oil pipe coupling is accommodated in the first end of the connecting device. The second end opposite to the first end is connected to the pipeline joint of the pressure test pump.

Further, the second end of the connecting device protrudes outward from the main body of the connecting device along the lengthwise direction.

Specifically, the main body of the connection device includes a wrench square and a transition body connected to each other, the wrench square is disposed close to the second end, and the transition body is disposed close to the first end.

Further, the cross-sectional shape of the wrench square is set to be quadrilateral or hexagonal.

Further, threads are provided on the outer surfaces of the first end and the second end of the connection device, and a first threaded thread and a second threaded thread are respectively formed on the first end and the second end.

Further, the inner cavity of the connecting device is divided into a liquid passing channel and a cavity for containing rods connected to each other, the opening of the liquid passing channel is at the second end of the connecting device, and the cavity for containing the rod is opened at the second end of the connecting device. The first end of the connecting device.

Specifically, the square rod head section is accommodated in the cavity of the receiving rod, and the liquid passage extends from the second end to the lower part of the transition body along the longitudinal direction of the connecting device.

Specifically, the cross-sectional shapes of the first end and the second end of the connecting device are circular,

The maximum inner diameter of the liquid passing channel is equal to the inner diameter of the thread provided on the second end minus 10-12 mm.

Preferably, the length of the accommodation rod cavity is greater than the sum of the total length of the first threaded button and the length of the square rod head section, and is smaller than the total length of the first threaded button and the length of the transition The sum of the lengths of the bodies.

Preferably, the diameter of the first end is larger than the diameter of the second end, and the outer diameter of the first screw is equal to the diameter of the transition body.

The beneficial effects of the technical solution provided by the utility model are:

(1) The inner diameter of the rod cavity of the connection device for the blowout preventer pressure test tool provided by the utility model ranges from 60 to 62 millimeters, and the length of the rod cavity is greater than the total length of the oil pipe male screw thread, so that The rod cavity can accommodate the exposed length of the square rod head in the oil pipe coupling in the special pressure test tool for BOP, so that it can accept the penetration of the square rod head after all the male threads of the oil pipe enter the oil pipe coupling;

(2) The connection device for the BOP pressure test tool provided by the utility model simplifies the combination of the conventional variable buckle and a short joint of the oil pipe with a coupling into a compact whole to solve the problem from the large diameter There are many connecting components between the oil pipe coupling with exposed square rod head and the small-diameter hydraulic hose joint, cumbersome operation and waste of materials.

Description of drawings

Fig. 1 is a structural schematic diagram of a connection device for a blowout preventer pressure test tool according to an embodiment of the present invention.

Among them, 100 is used for the connecting device of the blowout preventer pressure test tool, 10 is the first end of the connecting device, 11 is the first threaded thread, 20 is the second end of the connecting device, 21 is the second threaded thread, 30 is the main body of the connecting device, 31 Square wrench, 32 transition body, 41 liquid passage, 42 rod cavity.

detailed description

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

Referring to FIG. 1 , it shows a connection device 100 for a blowout preventer pressure test tool according to an embodiment of the present invention. The first end 10 of the connecting device 100 is connected to the oil pipe coupling in the blowout preventer pressure test tool (Patent No. ZL201020199106.6). The inner cavity of the oil pipe coupling is provided with a square rod head, and the square rod head protrudes from the oil pipe The square bar head section of the coupling is accommodated in a first end 10 of a connecting device 100, the second end of the connecting device 100 being opposite to the first end is connected to a line connection of a pressure test pump.

In an example of the present invention, the connection device 100 is made of more than 20 steel, for example, 25 chromium molybdenum steel. This example is only an illustrative example, and should not be construed as a limitation on the present utility model. Continuing to refer to FIG. 1 , the second end 20 of the connecting device 100 protrudes outward from the main body 30 of the connecting device 100 along the lengthwise direction. In another example of the present utility model, the cross-sectional shape of the first end 10 and the second end 20 of the connecting device 100 is circular, that is, the shapes of the first end and the second end of the connecting device 100 are both circular tubes, and The diameter of the first end 10 is much larger than the diameter of the second end 20. This design makes it easier for the first end 10 of the connecting device 100 to accommodate the square rod head of the BOP pressure test tool when the connecting device 100 is used, and at the same time facilitates the connection. The first end of the device 100 is connected to a large-diameter oil pipe collar, and the second end 20 of the connecting device 100 is connected to a small-diameter pipeline joint of the pressure test pump.

In yet another example of the present utility model, threads are provided on the outer surfaces of the first end 10 and the second end 20 of the connecting device 100, and a first screw thread 11 is formed on the first end 10, and a first screw thread 11 is formed on the second end 10. A second thread 21 is formed on the end 20 . The first screw thread 11 cooperates with the oil pipe coupling in the BOP special pressure test tool used on site. There are two types of oil pipe couplings: flat oil pipe coupling and externally thickened oil pipe coupling. The thread diameter and the total length of the thread are processed according to the API standard. For example, the types of oil pipe couplings in the special pressure test tool for blowout preventers are divided into flat oil pipe couplings with a diameter of 73 mm. Processing such as length 53 mm is in accordance with API standards. The processing standard of the second threaded thread 21 of the second end 20 of the connecting device 100 is designed corresponding to the standard (M22×2) of the pipeline joint (such as a hydraulic hose joint) of the small pressure test pump used, and the second threaded thread 21 The total length is designed to be 25 mm, and the top of the second end 20 is designed to be arc-shaped, which is conducive to the quick docking of the connecting device 100 and the pressure test pump, and can also improve the degree of sealing.

Continuing to refer to FIG. 1 , the main body 30 of the connecting device 100 includes a spanner flute 31 and a transition body 32 connected to each other. The spanner flute 31 is disposed near the second end 20 , and the transition body 32 is disposed near the first end 10 . In order to facilitate on-site operation, the cross-sectional shape of the wrench square flute 31 is set to four-sided or six-sided, that is, quadrilateral or hexagonal, and the length is designed to be 20-30 mm. In order to facilitate the processing of the connection device 100, the diameter of the transition body 32 is designed to be the same as the outer diameter of the end face of the first screw 11, and the length of the transition body 32 is designed to be the same as the square rod head in the special pressure test tool for blowout preventers. 2-3 times the exposed length of the oil pipe coupling, and the shortest is not less than 10mm, this length is used as the stuck point during lathe processing. This example is only an illustrative example, and should not be construed as a limitation on the present utility model.

As shown in Figure 1, the inner cavity of the connection device 100 is divided into a liquid passage 41 and a rod cavity 42 connected to each other, the opening of the liquid passage 41 is at the second end 20 of the connection device 100, and the liquid passage 41 is connected along the The longitudinal direction of the device 100 extends from the middle of the end surface of the second end 20 to the lower part of the transition body 32 , and then communicates with the rod cavity 42 . In an example of the present utility model, the maximum inner diameter of the liquid passage 41 is equal to the minor diameter (i.e. inner diameter) of the thread on the second end 20 minus 10-12 millimeters, that is, the required working strength of the second screw thread 21 is ensured. Basically, the liquid passage 41 is made as large as possible to avoid the influence of diameter reduction and throttling on the inner diameter of the hydraulic hose joint. For example, the oil pipe coupling of the BOP special pressure test tool used in conjunction with the connection device 100 is a flat oil pipe type with a diameter of 73 mm, and the average side length of the square rod head is 33 mm, and the square rod head is exposed at the oil pipe coupling by 10 mm. , so that the maximum inner diameter of the liquid passage 41 should be equal to the thread minor diameter of the second threaded button 20 minus 10 millimeters to be 8 millimeters. This example is only an illustrative example, and should not be construed as a limitation on the present utility model.

The rod accommodation cavity 42 is opened on the end surface of the first end 10 of the connection device 100 , and the exposed square rod head section in the special pressure test tool for BOP is accommodated in the rod accommodation cavity 42 during use. In another example of the present invention, the rod receiving cavity 42 is cylindrical in shape, and the inner diameter of the rod receiving cavity 42 is designed to be 60-62 mm. The length of the accommodation rod cavity 42 is greater than the sum of the total length of the first threaded thread 11 and the length of the square rod head exposed in the oil pipe coupling in the BOP special pressure test tool. This design ensures that the first threaded thread 11 After all of them enter the tubing coupling, it is also convenient for the square rod head to go deep. However, the length of the rod cavity 42 is about 5-6 millimeters less than the total length of the first threaded button 11 (i.e. the height of the first threaded button 11) and the length of the transition body 32. This is to ensure that the rod is empty. Enough strength is arranged between the cavity 42 and the square flute 31 of the wrench.

For example, the inner diameter of the rod cavity 42 is designed to be 62 millimeters, because the length of the rod cavity 42 needs to be greater than the total length (such as 53 millimeters) of the first threaded button 11 and the square rod head in the special pressure test tool for the blowout preventer. The sum of the exposed lengths (for example, 10 mm) in the oil pipe couplings, that is, the length of the accommodation rod cavity 42 needs to be greater than 63 mm. Since the length of the accommodation bar cavity 42 needs to be less than 5-6 mm of the sum of the total length of the first threaded button 11 (for example, 53 mm) and the length of the transition body 32 (for example, 30 mm), it is the sum of the lengths 83 minus 5 The mm should be calculated as 78 mm, and the subtracted 5 mm is the distance between the rod cavity 42 and the wrench square 31, that is, the length of the rod cavity 42 must be less than 78 mm, and the rod cavity 42 is determined after comprehensive consideration. The lumen length is 70mm.

The beneficial effects of the technical solution provided by the utility model are:

(1) The inner diameter of the rod cavity of the connection device for the blowout preventer pressure test tool provided by the utility model ranges from 60 to 62 millimeters, and the length of the rod cavity is greater than the total length of the oil pipe male screw thread, so that The rod cavity can accommodate the exposed length of the square rod head in the oil pipe coupling in the special pressure test tool for BOP, so that it can accept the penetration of the square rod head after all the male threads of the oil pipe enter the oil pipe coupling;

(2) The connection device for the BOP pressure test tool provided by the utility model simplifies the combination of the conventional variable buckle and a short joint of the oil pipe with a coupling into a compact whole to solve the problem from the large diameter There are many connecting components between the oil pipe coupling with exposed square rod head and the small-diameter hydraulic hose joint, cumbersome operation and waste of materials.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. the connecting device for testing tool for blowout preventer, it is characterised in that

First end of described connecting device is connected with the tubing coupling in described testing tool for blowout preventer, the inner chamber of described tubing coupling is provided with four directions head, the cubic head section protruding from described tubing coupling of described four directions head is contained in the first end of described connecting device, and second end relative with the first end of described connecting device is connected with the pipe joint of hydraulic test pump.

2. the connecting device for testing tool for blowout preventer according to claim 1, it is characterised in that

Second end of described connecting device is from the main body of described connecting device along longitudinally outwardly.

3. the connecting device for testing tool for blowout preventer according to claim 2, it is characterised in that

The main body of described connecting device includes that the spanner side that is connected to each other is stupefied and transition body, and described spanner side is stupefied to be arranged near described second end, and described transition body is arranged near described first end.

4. the connecting device for testing tool for blowout preventer according to claim 3, it is characterised in that

The stupefied cross sectional shape in described spanner side is set to tetragon or hexagon.

5. the connecting device for testing tool for blowout preventer according to claim 3, it is characterised in that

First end of described connecting device and the outer surface of the second end are provided with screw thread, and on described first end and the second end, form the first screw thread and the second screw thread respectively.

6. the connecting device for testing tool for blowout preventer according to claim 5, it is characterised in that

The inner chamber of described connecting device is divided into what be connected to each other cross liquid passage and hold bar cavity, and described the second end being opened on described connecting device crossing liquid passage, described appearance bar cavities open is in the first end of described connecting device.

7. the connecting device for testing tool for blowout preventer according to claim 6, it is characterised in that

Described four directions head section is contained in described appearance bar cavity, and the described liquid passage longitudinally along described connecting device of crossing extends to the bottom of described transition body from described second end.

8. the connecting device for testing tool for blowout preventer according to claim 7, it is characterised in that

First end of described connecting device and the cross sectional shape of the second end are circular,

The described maximum inner diameter crossing liquid passage deducts 10-12mm equal to the internal diameter of the screw thread being arranged on described second end.

9. the connecting device for testing tool for blowout preventer according to claim 7, it is characterised in that

The length of described appearance bar cavity is more than the length sum of the total length of described first screw thread with described four directions head section, simultaneously less than the length sum of the total length Yu described transition body that are arranged on described first screw thread.

10. the connecting device for testing tool for blowout preventer according to claim 8, it is characterised in that

The diameter of described first end is more than the diameter of described second end, and the external diameter of described first screw thread is equal to the diameter of described transition body.