Petroleum downhole pressure testing device

Abstract

The utility model discloses a petroleum downhole pressure testing device which comprises a shell, an upper connecting piece, a lower connecting piece, a PT tester and a pressure measuring bomb, an installing groove is formed in one side of the lower connecting piece, the pressure measuring bomb is arranged in the installing groove, fixing assemblies are arranged in the two ends of the installing groove, the pressure measuring bomb is located between the two fixing assemblies, and each fixing assembly comprises a blocking shell. The number of the inserting rods is four, four notches are formed in the peripheral side of the blocking shell, sliding grooves are formed in the two sides of the inner wall of each notch, sliding blocks are installed in the sliding grooves in a sliding mode, and springs are arranged between the sliding blocks and the sliding grooves. According to the utility model, through the arrangement of the fixing assemblies, after the pressure measuring bomb is used for a period of time, when the pressure measuring bomb needs to be overhauled, the pressure measuring bomb can be limited by releasing the fixation between one fixing assembly and the mounting groove and detaching the fixing assembly, so that a worker can detach the pressure measuring bomb conveniently, and the working efficiency is improved. And the pressure measuring bomb is overhauled.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure testing devices, in particular to a downhole oil pressure testing device. Background Art

[0002] During the oil well mining process, it is necessary to test the downhole pressure in real time to grasp the pressure changes of the oil well liquid in real time and provide protection for safe downhole operations; the oil well pressure test device is a device used to measure the downhole pressure of the oil well, usually used in the oil well production and testing stages in the oil industry. The design and purpose of these testing devices are to ensure the safe operation and production efficiency of the oil well, and to provide key data for decision-making and analysis, helping engineers and operators to determine the production strategy and optimization method of the oil well. In the existing technology, a PT tester is usually used to test the downhole pressure within a certain fluctuation range for a long time, and a pressure test bomb is used to measure the instantaneous value of the downhole pressure.

[0003] In the existing method of fixing the pressure measuring bomb, the pressure measuring bomb is usually fixed to the installation position by several bolts. In this method, when the pressure measuring bomb needs to be disassembled for maintenance, several bolts need to be disassembled by mechanical tools, which is not convenient for the staff to disassemble and subsequently install the pressure measuring bomb. Therefore, it is urgent to design an oil well pressure testing device to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a downhole oil pressure testing device to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A downhole oil well pressure testing device comprises a shell, an upper connecting piece, a lower connecting piece, a PT tester and a pressure measuring bullet, wherein a mounting groove is provided on one side of the lower connecting piece, the pressure measuring bullet is arranged in the mounting groove, a fixing assembly is provided inside both ends of the mounting groove, the pressure measuring bullet is located between two of the fixing assemblies, the fixing assembly comprises a blocking shell, a rotating ring, a plug rod and an extrusion ring, the number of the plug rods is four, four notches are provided on the circumferential side of the blocking shell, slide grooves are provided on both sides of the inner wall of the notch, a slider is slidably installed in the slide groove, a spring is provided between the slider and the slide groove, four plug rods are respectively slidably installed in the four notches, the plug rod is fixedly connected to two adjacent sliders, the extrusion ring is rotatably installed in the blocking shell, the extrusion ring corresponds to the four plug rods, the rotating ring is rotatably installed on one side of the blocking shell, the rotating ring is fixedly connected to the extrusion ring, four slots are provided on the circumferential sides of both ends of the mounting groove, the four slots correspond to the four plug rods, and the pressure measuring bullet is located between the two blocking shells.

[0007] Four trapezoidal protrusions are arranged on the circumferential side of the extrusion ring, and the four trapezoidal protrusions correspond to the four insertion rods respectively.

[0008] Fixed rings are fixedly installed on both ends of the installation groove. The rotating ring is rotatably arranged between the fixed rings. Four installation grooves are opened on the rotating ring. Card beads are elastically installed in the installation grooves. A plurality of card grooves are opened on the fixed ring. The plurality of card grooves correspond to the four card beads respectively.

[0009] Threaded grooves are provided on the inner wall circumferences of both ends of the shell, and threaded rods are fixedly installed on one end of the upper connecting member and the lower connecting member, and the threaded rods are threadedly installed in the threaded grooves.

[0010] The upper connecting member and the other end of the lower connecting member are each provided with a groove, four fixed cylinders are fixedly installed on one side of the inner wall of the groove, telescopic rods are elastically installed in the four fixed cylinders, a connecting plate is fixedly installed on one end of the four telescopic rods, a plug-in slot is fixedly installed on one side of the connecting plate, and plug-in rods are provided at both ends of the PT tester, and the plug-in rods are plugged into the plug-in slots.

[0011] A rubber shock-absorbing pad is fixedly installed on one side of the connecting plate. The rubber shock-absorbing pad is annular and is sleeved on the threaded cylinder and the circumference of the PT tester. A plurality of pressure measuring holes are opened on both sides of the shell.

[0012] In the above technical scheme, the oil well downhole pressure testing device provided by the utility model has the following beneficial effects:

[0013] (1) By setting up a fixing component, when the pressure measuring bullet needs to be repaired after being used for a period of time, the pressure measuring bullet can be released from the limit by releasing the fixation of a fixing component and the mounting groove and removing the fixing component, thereby facilitating the staff to remove the pressure measuring bullet and carry out maintenance on the pressure measuring bullet.

[0014] (2) By setting the squeezing ring, the four insertion rods can be squeezed at the same time by rotating the squeezing ring, so that the four insertion rods can extend out of the blocking shell and insert into the four slots at the same time, thereby facilitating the staff to fix the blocking shell between the inner walls of the installation groove to limit the pressure measuring bullet.

[0015] (3) By providing a slider and a spring, when the extrusion ring stops squeezing the insertion rod by rotating in the opposite direction, the spring can drive the four insertion rods to retract into the blocking shell through its own elastic force and the slider, and the slider can increase the stability of the insertion rod when it moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The present invention is a schematic diagram of the overall structure of an embodiment of a downhole oil pressure testing device of the present invention.

[0018] Figure 2 The present invention is a schematic diagram of the overall cross-sectional structure of an embodiment of a downhole oil pressure testing device of the present invention.

[0019] Figure 3 The present invention is a schematic diagram of a side cross-sectional structure of a fixing assembly provided in an embodiment of a downhole oil pressure testing device of the present invention.

[0020] Figure 4 This is a schematic diagram of the front cross-sectional structure of a fixing assembly provided in an embodiment of the oil well downhole pressure testing device of the utility model.

[0021] 1. Shell; 2. Upper connecting piece; 3. Lower connecting piece; 4. Fixing assembly; 5. Pressure measuring hole; 7. Pressure measuring spring; 8. PT tester; 9. Groove; 10. Fixing tube; 11. Telescopic rod; 12. Rubber shock-absorbing pad; 13. Connecting plate; 14. Threaded groove; 15. Threaded rod; 16. Slot; 17. Mounting groove; 18. Blocking shell; 19. Rotating ring; 20. Fixing ring; 21. Insert rod; 22. Notch; 23. Extrusion ring; 24. Mounting groove; 25. Card bead; 26. Card groove; 27. Slide groove; 28. Slider; 29. ​​Spring. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-4As shown, the oil well pressure testing device provided by the embodiment of the utility model includes a shell 1, an upper connecting member 2, a lower connecting member 3, a PT tester 8 and a pressure measuring spring 7. A mounting groove 17 is provided on one side of the lower connecting member 3. The pressure measuring spring 7 is arranged in the mounting groove 17. A fixing assembly 4 is provided inside both ends of the mounting groove 17. The pressure measuring spring 7 is located between two fixing assemblies 4. The fixing assembly 4 includes a blocking shell 18, a rotating ring 19, a plug rod 21 and an extrusion ring 23. The number of the plug rods 21 is four. Four notches 22 are provided on the circumference of the blocking shell 18. Slide grooves 27 are provided on both sides of the inner wall of the notch 22. A slider 28 is slidably installed in the slide groove 27. A spring 29 is provided between the slider 28 and the slide groove 27. Four plug rods 21 are slidably installed in the four notches 22 respectively. The plug rod 21 is fixed to two adjacent sliders 28 The extrusion ring 23 is rotatably installed in the blocking shell 18, and the extrusion ring 23 corresponds to the four plug rods 21. The rotating ring 19 is rotatably installed on one side of the blocking shell 18. The rotating ring 19 is fixedly connected to the extrusion ring 23. Four slots 16 are provided on both ends of the installation groove 17, and the four slots 16 correspond to the four plug rods 21. The pressure measuring spring 7 is located between the two blocking shells 18. Four trapezoidal protrusions are provided on the periphery of the extrusion ring 23, and the four trapezoidal protrusions correspond to the four plug rods 21 respectively. Fixed rings 20 are fixedly installed on both ends of the installation groove 17. The rotating ring 19 is rotatably arranged between the fixed rings 20. Four installation grooves 24 are provided on the periphery of the rotating ring 19, and beads 25 are elastically installed in the installation grooves 24. A plurality of grooves 26 are provided on the periphery of the fixed ring 20, and the plurality of grooves 26 correspond to the four beads 25 respectively.

[0024] Specifically, in the present embodiment, when installing the pressure measuring bullet 7, the pressure measuring bullet 7 is inserted into the installation groove 17, and then the blocking shell 18 is inserted into the installation groove 17 to resist the end of the pressure measuring bullet 7, and then the rotating ring 19 is rotated, so that the rotating ring 19 drives the extrusion ring 23 to rotate, and the extrusion ring 23 rotates through the four trapezoidal protrusions on its own circumference to squeeze the four insertion rods 21 at the same time, and the four insertion rods 21 will move under the extrusion force, wherein one end of the insertion rod 21 is in an arc shape, and when the trapezoidal protrusion rotates, the inclined surface of the trapezoidal protrusion will first contact the arc shape of the insertion rod 21, and then the trapezoidal protrusion moves, and the inclined surface of the trapezoidal protrusion will cause the insertion rod 21 to move out of the notch 22 and insert into the corresponding slot 1. 6, the blocking shell 18 is fixed. At the same time, when the rotating ring 19 is rotated to drive the squeezing ring 23 to squeeze the insertion rod 21, the card beads 25 on the side of the rotating ring 19 will be clamped into the card groove 26 on the side of the fixed ring 20 through elastic force, so as to fix and limit the rotating ring 19. When it is necessary to remove the pressure measuring bullet 7, the above steps are reversed. By using a certain force to rotate the rotating ring 19 in the opposite direction, the card beads 25 will be retracted into the installation groove 24 due to the extrusion force, and then the squeezing ring 23 is driven to rotate by the rotating ring 19 to stop squeezing the insertion rod 21. The spring 29 will drive the four insertion rods 21 to retract into the blocking shell 18 through the slider 28 through its own elastic force, so that the staff can easily disassemble or install the pressure measuring bullet 7.

[0025] The utility model provides a downhole oil pressure testing device, wherein the inner wall circumference sides at both ends of a shell 1 are provided with threaded grooves 14, one end of an upper connecting member 2 and a lower connecting member 3 are fixedly installed with threaded rods 15, the threaded rods 15 are threadedly installed in the threaded grooves 14, the other ends of the upper connecting member 2 and the lower connecting member 3 are provided with grooves 9, one side of the inner wall of the groove 9 is fixedly installed with four fixed cylinders 10, telescopic rods 11 are elastically installed in the four fixed cylinders 10, one end of the four telescopic rods 11 is fixedly installed with connecting plates 13, one side of the connecting plate 13 is fixedly installed with plug-in grooves, both ends of a PT tester 8 are provided with plug-in rods, the plug-in rods are plugged into the plug-in grooves, one side of the connecting plate 13 is fixedly installed with a rubber shock-absorbing pad 12, the rubber shock-absorbing pad 12 is annular, the rubber shock-absorbing pad 12 is sleeved on the threaded cylinder and the circumference of the PT tester 8, and a plurality of pressure measuring holes 5 are provided on both sides of the shell 1.

[0026] In another embodiment provided by the utility model, by rotating the upper connecting member 2 or the lower connecting member 3, the upper connecting member 2 drives the fixed cylinder 10 and the telescopic rod 11 to move, and the fixed cylinder 10 and the telescopic rod 11 will stop squeezing the PT tester 8, and make the plug-in slot disengage from the plug-in rod, thereby stopping the fixed limit of the PT tester 8. When installing the PT tester 8, the plug-in rod on the lower side of the PT tester 8 is inserted into the plug-in slot on the upper side of the connecting plate 13 on one side of the lower connecting member 3, and then the upper connecting member 2 is threadedly installed on the housing 1, and the plug-in rod on the upper side of the PT tester 8 is inserted into the plug-in slot on the connecting plate 13 on one side of the upper connecting member 2, so that the staff can easily fix and limit the PT tester 8.

[0027] Working principle: when the pressure measuring bullet 7 needs to be removed, the extrusion ring 23 is driven to rotate by the rotating ring 19 to stop the extrusion of the insertion rod 21, so that the insertion rod 21 is retracted into the blocking shell 18, and the blocking shell 18 can be removed, so that it is convenient for the staff to remove the pressure measuring bullet 7. When installing, the pressure measuring bullet 7 can be installed by reversing the above steps. When disassembling the PT tester 8, the upper connecting piece 2 or the lower connecting piece 3 is removed, and the plug-in slot on one of the connecting plates 13 is disengaged from the plug-in rod of the PT tester 8, so that the fixed limit of the PT tester 8 can be released, so that it is convenient for the staff to disassemble the PT tester 8. When installing, the PT tester 8 can be installed by reversing the above steps.

[0028] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A downhole oil well pressure testing device, comprising a housing (1), an upper connecting piece (2), a lower connecting piece (3), a PT tester (8) and a pressure measuring bomb (7), characterized in that: A mounting groove (17) is provided on one side of the lower connecting member (3), the pressure measuring spring (7) is arranged in the mounting groove (17), and fixing components (4) are arranged inside both ends of the mounting groove (17), the pressure measuring spring (7) is located between two fixing components (4), the fixing component (4) comprises a blocking shell (18), a rotating ring (19), an insert rod (21) and an extrusion ring (23), the number of the insert rods (21) is four, four notches (22) are provided on the circumference of the blocking shell (18), and both sides of the inner wall of the notch (22) are provided with a slide groove (27), a slider (28) is slidably installed in the slide groove (27), and a sliding block (28) is provided between the slider (28) and the slide groove (27). A spring (29) is arranged, the four insertion rods (21) are slidably installed in the four notches (22) respectively, the insertion rod (21) is fixedly connected to two adjacent sliders (28), the extrusion ring (23) is rotatably installed in the blocking shell (18), the extrusion ring (23) corresponds to the four insertion rods (21), the rotating ring (19) is rotatably installed on one side of the blocking shell (18), the rotating ring (19) is fixedly connected to the extrusion ring (23), four slots (16) are opened on the circumference of both ends of the installation groove (17), the four slots (16) correspond to the four insertion rods (21), and the pressure measuring spring (7) is located between the two blocking shells (18).

2. The oil well pressure testing device according to claim 1, characterized in that: Four trapezoidal protrusions are arranged on the circumferential side of the extrusion ring (23), and the four trapezoidal protrusions correspond to the four insertion rods (21) respectively.

3. The oil well downhole pressure testing device according to claim 1, characterized in that: A fixing ring (20) is fixedly installed on both ends of the installation groove (17), the rotating ring (19) is rotatably arranged between the fixing rings (20), four installation grooves (24) are opened on the circumference of the rotating ring (19), a clamping bead (25) is elastically installed in the installation groove (24), and a plurality of clamping grooves (26) are opened on the circumference of the fixing ring (20), and the plurality of clamping grooves (26) respectively correspond to the four clamping beads (25).

4. The oil well downhole pressure testing device according to claim 1, characterized in that: The inner wall circumferences of both ends of the housing (1) are provided with threaded grooves (14); one end of the upper connecting piece (2) and the lower connecting piece (3) are fixedly mounted with threaded rods (15); the threaded rods (15) are threadedly mounted in the threaded grooves (14).

5. The oil well downhole pressure testing device according to claim 4, characterized in that: The upper connecting member (2) and the lower connecting member (3) are each provided with a groove (9) at the other end, four fixed cylinders (10) are fixedly mounted on one side of the inner wall of the groove (9), telescopic rods (11) are elastically mounted in the four fixed cylinders (10), a connecting plate (13) is fixedly mounted on one end of the four telescopic rods (11), a plug-in slot is fixedly mounted on one side of the connecting plate (13), and plug-in rods are provided at both ends of the PT tester (8), and the plug-in rods are plugged into the plug-in slots.

6. The oil well downhole pressure testing device according to claim 5, characterized in that: A rubber shock-absorbing pad (12) is fixedly mounted on one side of the connecting plate (13). The rubber shock-absorbing pad (12) is annular and is sleeved around the PT tester (8). A plurality of pressure measuring holes (5) are provided on both sides of the housing (1).

Images