Pressure test device for instrument while drilling

Abstract

The utility model relates to a while-drilling instrument pressure testing device which comprises a base, a pressure testing cylinder horizontally arranged on the base and a moving trolley movably arranged on the base, an opening is formed in one end of the pressure testing cylinder, a plug facing the opening of the pressure testing cylinder is arranged on the moving trolley, and a stock bin used for containing a test piece is arranged at the end of the plug. A plurality of supporting rollers used for supporting the stock bin are arranged on the base at intervals, the moving trolley is used for driving the stock bin to enter or be separated from the pressure testing cylinder and achieving plugging or opening of the opening of the pressure testing cylinder through the plug, and a limiting mechanism used for limiting movement of the moving trolley is arranged on the moving trolley. The stock bin can enter or break away from the pressure test cylinder conveniently, the opening blocking speed of the pressure test cylinder is high, the labor intensity of workers is small, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure testing, in particular to a pressure testing device for a drilling instrument. Background Art

[0002] In the field of oil drilling and production, directional well and horizontal well technologies are important technologies for improving crude oil recovery and stabilizing oil field production. Especially for complex oil and gas formations, the drilling rate and wellbore trajectory control have always been the main factors restricting the reduction of drilling and production costs. The formation information data collected by accurate while-drilling measurement instruments plays a decisive role in improving the drilling rate and wellbore trajectory control, and is the guarantee of the success of well drilling. While-drilling instruments are commonly used downhole tools for drilling. Before being lowered into the well, high-pressure tests are required to detect the sealing of the tool to prevent damage to the instrument circuit and actuator due to poor sealing.

[0003] At present, commonly used test devices include a horizontal test cylinder, which has an opening at one end and a plugging head connected to the opening through a thread. During the test, the drilling instrument needs to be hoisted into the horizontal test cylinder, and then the plugging head is manually screwed into the opening to achieve sealing. When hoisting the drilling instrument into the horizontal test cylinder, the drilling instrument needs to be hoisted to the vicinity of the opening first, and then the drilling instrument needs to be manually pushed into the horizontal test cylinder, and then the plugging head is manually tightened. The operation is cumbersome, the labor intensity of the workers is high, and the work efficiency is low. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a pressure testing device for a drilling instrument.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a pressure testing device for a drilling instrument, comprising a base, a pressure testing cylinder horizontally arranged on the base and a mobile trolley movably arranged on the base, an opening being provided at one end of the pressure testing cylinder, a plug facing the opening of the pressure testing cylinder being provided on the mobile trolley, a silo for placing test pieces being provided at the end of the plug, a plurality of support rollers for supporting the silo being provided at intervals on the base, the mobile trolley being used to drive the silo into or out of the pressure testing cylinder, and to enable the plug to seal or open the opening of the pressure testing cylinder, and a limiting mechanism for limiting the movement of the mobile trolley being provided on the mobile trolley.

[0006] As a preferred solution, the pressure test cylinder is provided with a test space, a blocking space, a rotation space and a guide space along its axial direction in sequence. The test space is used to accommodate the silo, and the blocking space is used to cooperate with the plug. The movable trolley is provided with a horizontal moving mechanism and a rotation mechanism. The horizontal moving mechanism is rotatably provided with a rotating shaft connected to the plug. The rotation mechanism is used to drive the rotating shaft to rotate around its axial direction by a certain angle. The plug is rotatably connected to the silo. A limiting part is provided on the outer wall of the plug. The horizontal moving mechanism is used to drive the plug to move horizontally back and forth to realize that the limiting part of the plug enters or leaves the rotation space. A limiting ring is provided in the guide space, and a guide groove that slides with the limiting part is provided on the inner side of the limiting ring. The limiting part has a locked state and an unlocked state. In the locked state, the limiting part is located in the rotation space and is against the limiting ring. In the unlocked state, the limiting part can slide with the guide groove.

[0007] As a preferred solution, an installation box is provided on the mobile trolley for horizontal sliding, and a rotating shaft is rotatably provided in the installation box. The rotating mechanism includes a driving cylinder, a slide slidingly provided on the installation box, and a rack provided at the lower end of the slide. The piston rod end of the driving cylinder is connected to the slide, and a gear meshing with the rack is provided on the rotating shaft.

[0008] As a preferred solution, the inner wall of the sealing space is provided with a high-pressure sealing ring that cooperates with the plug, and the horizontal movement mechanism includes a pushing cylinder, and the end of the piston rod of the pushing cylinder is provided with a connecting shaft that is rotatably connected to the rotating shaft.

[0009] As a preferred solution, the limiting mechanism includes two limiting cylinders, two limiting flanges are provided on the base near the pressure test cylinder, the piston rod of the limiting cylinder is vertically facing downward and a limiting pin is provided at the end, and a limiting hole is provided on the limiting flange to cooperate with the limiting pin.

[0010] As a preferred solution, two movable rails are provided on the base, and the wheels of the movable trolley cooperate with the movable rails.

[0011] As a preferred solution, the pressure test cylinder is provided with a water inlet communicating with the test space and a water outlet communicating with the rotation space, the water inlet is provided with a first switch valve, and the water outlet is provided with a second switch valve.

[0012] As a preferred solution, a protective nylon tube is provided on the inner wall of the test space, and a water inlet hole connected to the water inlet is provided on the protective nylon tube.

[0013] The beneficial effects of the present application are as follows: 1. The present application drives the silo into or out of the pressure test cylinder by the mobile trolley, and realizes the plugging or opening of the pressure test cylinder. The silo is convenient to enter or out of the pressure test cylinder, the speed of plugging the pressure test cylinder opening is fast, the labor intensity of workers is low, and the work efficiency is greatly improved. The limiting mechanism restricts the movement of the mobile trolley to prevent the plug from returning to the pressure test cylinder during the pressure test, thereby ensuring the safety and sealing of the pressure test.

[0014] 2. In this application, a limit part is set, and the horizontal moving mechanism drives the plug to move into the rotating space. The rotating mechanism drives the rotating shaft to rotate a certain angle, and the plug rotates accordingly, so that the return limit part rotates and forms an interlaced clamp with the guide groove of the limit ring, so that the plug and the limit ring can be offset, and the limit part is in a locked state, further preventing the plug from returning to the pressure test cylinder during the pressure test, and further ensuring the safety and sealing of the test pressure.

[0015] 3. This application ensures the sealing of the plug in the sealing space by arranging a high-pressure sealing ring and cooperating with the outer wall of the plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 for Figure 1 AA cross-sectional view;

[0018] Figure 3 This is a schematic structural diagram of the horizontal moving mechanism and the rotating mechanism of the utility model;

[0019] Figure 4 for Figure 1 A top view of

[0020] Figure 5 This is a cross-sectional view of the pressure test cylinder of the present utility model;

[0021] Figure 6 This is a structural diagram of the utility model of the silo entering the pressure test cylinder;

[0022] Figure 7 for Figure 6 BB cross-sectional view.

[0023] Markings in the figure: 1. Base, 2. Moving trolley, 21. Moving track, 22. Driving motor, 3. Plug, 31. Limiting part, 4. Silo, 5. Support roller, 51. Lifting cylinder, 6. Horizontal moving mechanism, 7. Rotating mechanism, 71. Driving cylinder, 72. Slide plate, 73. Rack, 74. Gear, 8. Limiting mechanism, 81. Limiting cylinder, 82. Limiting flange, 9. Pressure test cylinder, 91. Test space, 911. Protective nylon tube, 92. Sealing space, 921. High-pressure sealing ring, 93. Rotating space, 94. Guide space, 941. Limiting ring, 942. Guide groove, 95. Water inlet, 96. Water outlet, 10. Rotating shaft, 101. Installation box, 102. Side panel, 103. Guide wheel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] See also Figure 1-7 The embodiment of the utility model provides a pressure testing device for a drilling instrument, including a base 1, a pressure testing cylinder 9 horizontally arranged on the base 1 and a mobile trolley 2 movably arranged on the base 1, one end of the pressure testing cylinder 9 is provided with an opening, the mobile trolley 2 is provided with a plug 3 opening toward the pressure testing cylinder 9, the end of the plug 3 is provided with a silo 4 for placing test pieces, a plurality of support rollers 5 for supporting the silo 4 are arranged at intervals on the base 1, the mobile trolley 2 is used to drive the silo 4 to enter or exit the pressure testing cylinder 9, and to realize the plug 3 to seal or open the opening of the pressure testing cylinder 9, and the mobile trolley 2 is provided with a limiting mechanism 8 for limiting the movement of the mobile trolley 2.

[0026] The pressure test cylinder 9 is provided with a test space 91, a blocking space 92, a rotation space 93, and a guide space 94 in sequence along its axial direction. The test space 91, the blocking space 92, the rotation space 93, and the guide space 94 are connected in sequence. The blocking space 92, the rotation space 93, and the guide space 94 are all annular. The inner diameter of the rotation space 93 is larger than the inner diameter of the guide space 94, and the inner diameter of the rotation space 93 is larger than the inner diameter of the blocking space 92. The test space 91 is cylindrical with one end open, and the inner diameter of the blocking space 92 is equal to the inner diameter of the test space 91. The guide space 94 is located at the opening of the pressure test cylinder 9. The test space 91 is used to accommodate the silo 4, and the blocking space 92 is used to cooperate with the plug 3. The longitudinal section of the silo 4 is U-shaped, and the two ends of the silo 4 are closed.

[0027] The movable trolley 2 is provided with a horizontal moving mechanism 6 and a rotating mechanism 7. The horizontal moving mechanism 6 is rotatably provided with a rotating shaft 10 connected to the plug 3. The horizontal moving mechanism 6 is used to drive the plug 3 to move horizontally to enable the plug 3 to enter or exit the rotating space 93. The rotating mechanism 7 is used to drive the rotating shaft 10 to rotate around its axial direction by a certain angle. The plug 3 is rotatably connected to the silo 4. A limiting portion 31 is provided on the outer wall of the plug 3. The horizontal moving mechanism 6 is used to drive the plug 3 to move back and forth horizontally to enable the limiting portion 31 of the plug 3 to enter or exit the rotating space 93. A limiting ring 941 is provided in the guide space 94, and a guide groove 942 is provided on the inner side of the limiting ring 941 to slide with the limiting portion 31. The limiting portion 31 has a locked state and an unlocked state. In the locked state, the limiting portion 31 is located in the rotating space 93 and is against the limiting ring 941. In the unlocked state, the limiting portion 31 can slide with the guide groove 942.

[0028] The plug 3 is in the shape of an axis, and there are multiple limiting parts 31. The multiple limiting parts 31 are arranged on the outer wall of the plug 3 along the circumferential direction of the plug 3. In this embodiment, the number of limiting parts 31 is four, and the rotating mechanism 7 can drive the rotating shaft 10 to rotate 45 degrees around its axial direction, so that the limiting part 31 is rotated and the guide groove 942 of the limiting ring 941 is formed in an interlaced manner. Furthermore, the rotation angle of the limiting part 31 can be adjusted according to the number of limiting parts 31 to meet the requirement that the limiting part 31 is rotated and the guide groove 942 of the limiting ring 941 is formed in an interlaced manner. For example, when the number of limiting parts 31 is two, the angle of rotation of the limiting part 31 driven by the rotating mechanism 7 is 90 degrees.

[0029] Due to the weight of the silo 4 itself and the weight of the drilling equipment, and the plug 3 is rotatably connected to the silo 4, when the rotating mechanism 7 drives the rotating shaft 10 to rotate, the silo 4 will not rotate accordingly, and the outer wall of the silo 4 can fit the inner wall of the pressure test cylinder 9.

[0030] Specifically, a mounting box 101 slides horizontally on the mobile trolley 2. The rotating shaft 10 rotates and passes through the mounting box 101. Two side panels 102 are provided on the mobile trolley 2. The mounting box 101 slides between the two side panels 102. Grooves are provided on the opposing sides of the two side panels 102. Guide wheels 103 are provided on either side of the mounting box 101, which roll in engagement with the grooves. The rotating mechanism 7 includes a driving cylinder 71, a slide 72 slidingly mounted on the mounting box 101, and a rack 73 disposed at the lower end of the slide 72. The piston rod end of the driving cylinder 71 is connected to the slide 72. A gear 74 meshing with the rack 73 is provided on the rotating shaft 10.

[0031] Combine Figure 5-7As shown, the inner wall of the sealed space 92 is provided with a high-pressure sealing ring 921 that cooperates with the plug 3. The plug 3 has a sealing portion located at the front end of the limiting portion 31. The sealing portion cooperates with the high-pressure sealing ring 921. By providing the high-pressure sealing ring 921 and cooperating with the outer wall of the plug 3, the plug 3 is ensured to seal the sealed space 92 tightly. The horizontal movement mechanism 6 includes a push cylinder, the piston rod end of which is provided with a connecting shaft that is rotatably connected to the rotating shaft 10. It should be noted that the parts not described in detail in this application are all prior art.

[0032] Combine Figure 1 、 Figure 3 and Figure 4 As shown, the limiting mechanism 8 includes two limiting cylinders 81. Two limiting flanges 82 are provided on the base 1 near the pressure test cylinder 9. The piston rods of the limiting cylinders 81 are vertically downward and have limiting pins at their ends. The limiting flanges 82 are provided with limiting holes that cooperate with the limiting pins. Two movable rails 21 are provided on the base 1, and the wheels of the movable trolley 2 cooperate with the movable rails 21.

[0033] The mobile trolley 2 includes a trolley body and four wheels arranged at the lower end of the trolley body, including two front wheels and two rear wheels. The lower end of the trolley body is rotatably provided with a front driven shaft and a rear drive shaft. The two front wheels are located at both ends of the front driven shaft, and the two rear wheels are located at both ends of the rear drive shaft. The front wheels and rear wheels on the same side cooperate with the mobile track 21 on the same side. The trolley body is provided with a drive motor 22, and the output shaft of the drive motor 22 is provided with a driving sprocket. The rear drive shaft is provided with a driven sprocket. The driving sprocket and the driven sprocket are connected by a chain. The trolley body is provided with a rectangular clearance hole for the chain to pass through. The end of the mobile track 21 away from the pressure test cylinder 9 is provided with a block for blocking the wheel. The block is provided to prevent the wheel from moving out of the mobile track 21.

[0034] In addition, the pressure test cylinder 9 is provided with a water inlet 95 communicating with the test space 91 and a water outlet 96 communicating with the rotation space 93 . The water inlet 95 is provided with a first switch valve, and the water outlet 96 is provided with a second switch valve.

[0035] When the present application is used, the drilling instrument is hoisted into the silo 4, and the mobile trolley 2 pushes the plug 3 and the silo 4 to move toward the pressure test cylinder 9. When the mobile trolley 2 moves to the limit pin of the limit cylinder 81 and is located above the limit hole of the limit flange 82, the limit cylinder 81 pushes the limit pin to engage in the limit hole, thereby limiting the mobile trolley 2; then the cylinder is pushed to push the plug 3 and the silo 4 to move toward the pressure test cylinder 9, and finally the silo 4 is in the test space 91, the blocking part of the plug 3 is located in the blocking space 92, and the limiting part 31 is located in the rotating In the space 93, the rotating mechanism 7 drives the rotating shaft 10 and the plug 3 to rotate clockwise 45 degrees, so that the return limit part 31 can rotate and form an interlaced clamping with the guide groove 942 of the limit ring 941, so that the plug 3 can be abutted against the limit ring 941, so that the limit part 31 is in a locked state, preventing the plug 3 from retreating out of the pressure test cylinder 9 during the pressure test, further ensuring the safety and sealing of the test pressure. Subsequently, high-pressure water is introduced into the pressure test cylinder 9 through the water inlet 95 to carry out the pressure test, and high-pressure water can be pumped into the pressure test cylinder 9 by a high-pressure pump. After the pressure test is completed, high-pressure water is released through the water outlet 96, and the rotating mechanism 7 drives the rotating shaft 10 and the plug 3 to rotate counterclockwise 45 degrees so that the limiting part 31 can slide with the guide groove 942 after rotation, and then push the cylinder to pull the plug 3 and the silo 4 to move outward, and finally make the silo 4 in the test space 91, and the limiting part 31 of the plug 3 is located in the guide space 94, and then the moving trolley 2 pulls the plug 3 and the silo 4 out of the pressure test cylinder 9. The silo 4 of this application is convenient to enter or exit the pressure test cylinder 9, and the plug 3 blocks the opening speed of the pressure test cylinder 9 quickly, the labor intensity of workers is small, and the work efficiency is greatly improved.

[0036] Of course, the present invention is not limited to the above-described embodiments. Several other embodiments based on the design concept of the present invention are provided below.

[0037] For example, in other embodiments, different from the embodiments described above, a protective nylon tube 911 is provided on the inner wall of the test space 91, and a water inlet hole connected to the water inlet 95 is provided on the protective nylon tube 911 to prevent the silo 4 from entering and exiting the test space 91 and causing damage to the inner wall of the pressure test cylinder 1.

[0038] For example, in other embodiments, different from the embodiments described above, a plurality of support legs are provided at the lower end of the base 1, and the support roller 5 is rotatably arranged on the mounting seat. A lifting mechanism for driving the mounting seat to move up and down is provided under the mounting seat. The lifting mechanism includes a support plate and a lifting cylinder 51 provided at the lower end of the support plate. The piston rod end of the lifting cylinder 51 passes through the support plate and is connected to the bottom of the mounting seat. A guide shaft passing through the support plate is vertically provided at the bottom of the mounting seat. There are two guide shafts, which are respectively located on both sides of the piston rod of the lifting cylinder. In the embodiment of the present application, the number of support rollers 5 is two or three, and the number of support rollers 5 can be configured according to the length of the silo 4. When the mobile trolley 2 pushes the silo 4 into the pressure test cylinder 9, multiple lifting mechanisms drive multiple support rollers 5 to descend from right to left along the moving direction of the mobile trolley 2 until the mobile trolley 2 pushes the silo 4 completely into the pressure test cylinder 9. When the mobile trolley 2 pulls the silo 4 out of the pressure test cylinder 9, multiple lifting mechanisms drive multiple support rollers 5 to rise from left to right along the moving direction of the mobile trolley 2 until the mobile trolley 2 pushes the silo 4 completely out of the pressure test cylinder 9, thereby avoiding interference between the support rollers 5 and the mobile trolley.

[0039] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. A pressure testing device for a drilling instrument, characterized in that: The invention comprises a base (1), a pressure test cylinder (9) horizontally arranged on the base (1), and a movable trolley (2) movably arranged on the base (1), wherein one end of the pressure test cylinder (9) is provided with an opening, the movable trolley (2) is provided with a plug (3) facing the opening of the pressure test cylinder (9), the end of the plug (3) is provided with a silo (4) for placing test pieces, a plurality of support rollers (5) for supporting the silo (4) are arranged at intervals on the base (1), the movable trolley (2) is used to drive the silo (4) to enter or leave the pressure test cylinder (9), and realize that the plug (3) blocks or opens the opening of the pressure test cylinder (9), and the movable trolley (2) is provided with a limiting mechanism (8) for limiting the movement of the movable trolley (2).

2. The pressure testing device for a drilling instrument according to claim 1, characterized in that: The pressure test cylinder (9) is provided with a test space (91), a blocking space (92), a rotation space (93) and a guide space (94) in sequence along its axial direction. The test space (91) is used to accommodate the silo (4). The blocking space (92) is used to cooperate with the plug (3). The movable trolley (2) is provided with a horizontal moving mechanism (6) and a rotation mechanism (7). The horizontal moving mechanism (6) is provided with a rotating shaft (10) connected to the plug (3). The rotation mechanism (7) is used to drive the rotating shaft (10) to rotate around its axial direction by a certain angle. The plug (3) is rotatably connected to the silo (4). A limit portion is provided on the outer wall of the plug (3). (31), the horizontal moving mechanism (6) is used to drive the plug (3) to move horizontally back and forth, so as to enable the limiting portion (31) of the plug (3) to enter or leave the rotating space (93), a limiting ring (941) is provided in the guide space (94), and a guide groove (942) that slides with the limiting portion (31) is provided on the inner side of the limiting ring (941), and the limiting portion (31) has a locked state and an unlocked state. In the locked state, the limiting portion (31) is located in the rotating space (93) and is against the limiting ring (941). In the unlocked state, the limiting portion (31) can slide with the guide groove (942).

3. The pressure testing device for a drilling instrument according to claim 2, characterized in that: The movable trolley (2) is provided with a mounting box (101) which is slidable horizontally, and the rotating shaft (10) is rotatably arranged in the mounting box (101). The rotating mechanism (7) includes a driving cylinder (71), a slide plate (72) which is slidably arranged on the mounting box (101), and a rack (73) arranged at the lower end of the slide plate (72). The end of the piston rod of the driving cylinder (71) is connected to the slide plate (72), and the rotating shaft (10) is provided with a gear (74) which is meshed with the rack (73).

4. The pressure testing device for a drilling instrument according to claim 2, characterized in that: The inner wall of the sealing space (92) is provided with a high-pressure sealing ring (921) that cooperates with the plug (3). The horizontal movement mechanism (6) includes a pushing cylinder, and the end of the piston rod of the pushing cylinder is provided with a connecting shaft that is rotatably connected to the rotating shaft (10).

5. The pressure testing device for a drilling instrument according to claim 1, characterized in that: The limiting mechanism (8) includes two limiting cylinders (81), two limiting flanges (82) are provided on the base (1) near the pressure test cylinder (9), the piston rod of the limiting cylinder (81) is vertically downward and a limiting pin is provided at the end thereof, and a limiting hole is provided on the limiting flange (82) to cooperate with the limiting pin.

6. The pressure testing device for drilling equipment according to claim 1, characterized in that: Two movable rails (21) are provided on the base (1), and the wheels of the movable trolley (2) cooperate with the movable rails (21).

7. The pressure testing device for a drilling instrument according to claim 2, characterized in that: The pressure test cylinder (9) is provided with a water inlet (95) communicating with the test space (91) and a water outlet (96) communicating with the rotation space (93); the water inlet (95) is provided with a first switch valve, and the water outlet (96) is provided with a second switch valve.

8. The pressure testing device for a drilling instrument according to claim 7, characterized in that: A protective nylon tube (911) is provided on the inner wall of the test space (91), and a water inlet hole communicating with the water inlet (95) is provided on the protective nylon tube (911).

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