A kind of oil casing diameter gauge

Abstract

The utility model relates to the technical field of diameter gauges, and discloses a petroleum casing diameter gauge, comprising a diameter gauge body, a chassis is installed at the lower end of the diameter gauge body, a plastic diameter ring is sleeved on the outside of the diameter gauge body, a fixing ring is sleeved on the outside of the diameter gauge body located above the plastic diameter ring, a positioning mechanism is arranged inside the diameter gauge body, the positioning mechanism comprises a rotating rod, a ratchet is sleeved on the outside of the rotating rod, and an adjustment mechanism is arranged on the rear side of the ratchet; the utility model is provided with a plastic diameter ring, and the plastic diameter ring will not cause damage to the inner wall of the petroleum casing when performing diameter detection, the rotating rod in the positioning mechanism is rotated clockwise to drive two racks to move, thereby driving the positioning plate to move to the outside of the diameter gauge body and press the fixing ring, thereby fixing the plastic diameter ring, and the rotating rod is rotated counterclockwise to drive the positioning plate to retract into the inside of the diameter gauge body, so that the plastic diameter ring is easy to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of diameter gauges, in particular to a petroleum casing diameter gauge. Background Art

[0002] In the process of oil and gas drilling, casing is an important wellbore supporting structure. The accuracy and patency of its inner diameter are crucial to the success of drilling operations. Therefore, it is necessary to carry out diameter detection, which requires the use of a diameter gauge. At present, the casing diameter is generally measured by the diameter gauge used for ordinary threaded casing. The main disadvantages of this practice are: Since the conventional casing diameter gauge is made of all-metal, its hardness is very high, and when measuring the diameter, the diameter gauge often collides with the casing thread, thereby damaging the casing thread and causing great trouble for subsequent operations.

[0003] A Chinese patent discloses a diameter gauge for airtight buckle casing (authorization announcement number CN203925481U). This patented technology can effectively protect the airtight thread from damage during the diameter adjustment through a plastic diameter ring, has high reliability and safety, and can meet the diameter requirements of the airtight buckle casing entering the well;

[0004] However, it has certain disadvantages: its internal threaded fixing ring is threadedly mounted on the main body of the diameter gauge. When fixing the internal threaded fixing ring, it is impossible to firmly fix the internal threaded fixing ring by simply turning it by hand, so tools are needed. Tools are still needed when disassembling. Therefore, the disassembly and assembly of the plastic diameter ring is time-consuming, laborious and inconvenient. Utility Model Content

[0005] The utility model aims to provide a petroleum casing diameter gauge to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A petroleum casing diameter gauge comprises a diameter gauge body, a chassis is installed at the lower end of the diameter gauge body, a plastic diameter ring is sleeved on the outside of the diameter gauge body, a fixing ring is sleeved on the outside of the diameter gauge body located above the plastic diameter ring, a positioning mechanism is arranged inside the diameter gauge body, the positioning mechanism comprises a rotating rod, a gear is installed at the lower end of the rotating rod, racks are meshed and connected on both the left and right sides of the gear, a slide plate is slidably connected to the lower surface of the rack, and a positioning piece is arranged at the end of the rack away from the gear; a ratchet is sleeved on the outside of the rotating rod, and an adjustment mechanism is arranged on the rear side of the ratchet.

[0008] As a further solution of the utility model: the positioning member includes a positioning rod, and a positioning plate is installed at one end of the positioning rod away from the rack.

[0009] As a further solution of the utility model: the adjustment mechanism includes a spring, a support block is installed at the rear end of the spring, and a pawl is movably fitted at the front end of the spring, and the left end of the pawl is rotatably connected to a support rod.

[0010] As a further solution of the utility model: the outer diameter of the diameter gauge body is the same as the inner diameter of the plastic diameter ring, the outer diameter of the plastic diameter ring is larger than the outer diameter of the chassis, the outer diameter of the fixed ring is smaller than the outer diameter of the plastic diameter ring, the rotating rod penetrates and is rotatably connected to the upper surface of the diameter gauge body, the lower end of the slide plate is installed on the inner lower surface of the diameter gauge body, and the ratchet and the adjustment mechanism are both located above the diameter gauge body.

[0011] As a further solution of the utility model: the end of the positioning rod close to the rack is installed on the upper surface of the rack, the positioning plate movably penetrates one side surface of the diameter gauge body, and the lower surface of the positioning plate fits the upper surface of the fixing ring.

[0012] As a further solution of the utility model: the lower ends of the support block and the support rod are both installed on the upper surface of the diameter gauge body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is provided with a plastic diameter ring, which will not damage the inner wall of the oil casing during diameter detection, and has high reliability and safety.

[0015] 2. The utility model is provided with a positioning mechanism. The rotating rod in the positioning mechanism is rotated clockwise to drive the two racks to move, thereby driving the positioning plate to move to the outside of the diameter gauge body and press the fixing ring, thereby fixing the plastic diameter ring. The rotating rod is rotated counterclockwise to drive the positioning plate to retract into the inside of the diameter gauge body, which is convenient for disassembly and assembly of the plastic diameter ring; the pawl in the adjustment mechanism clamps the ratchet wheel, so that the rotating rod cannot rotate when it is not necessary to rotate counterclockwise, thereby avoiding the positioning plate from retracting into the inside of the diameter gauge body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a petroleum casing diameter gauge;

[0017] Figure 2 This is an exploded view of a petroleum casing diameter gauge;

[0018] Figure 3 It is a structural schematic diagram of a positioning mechanism in a petroleum casing diameter gauge;

[0019] Figure 4 The diagram is a structural diagram of an adjusting mechanism in a petroleum casing diameter gauge.

[0020] In the figure: 1. diameter gauge body; 2. chassis; 3. plastic diameter ring; 4. fixing ring; 5. positioning mechanism; 6. rotating rod; 7. gear; 8. rack; 9. slide plate; 10. positioning piece; 11. positioning rod; 12. positioning plate; 13. ratchet; 14. adjustment mechanism; 15. spring; 16. support block; 17. pawl; 18. support rod. DETAILED DESCRIPTION

[0021] See also Figure 1 and Figure 2 In the embodiment of the utility model, a petroleum casing diameter gauge includes a diameter gauge body 1, a bottom plate 2 is installed at the lower end of the diameter gauge body 1, and a plastic diameter ring 3 is sleeved on the outside of the diameter gauge body 1, the outer diameter of the diameter gauge body 1 is the same as the inner diameter of the plastic diameter ring 3, the outer diameter of the plastic diameter ring 3 is larger than the outer diameter of the bottom plate 2, and a fixing ring 4 is sleeved on the outside of the diameter gauge body 1 above the plastic diameter ring 3, and the outer diameter of the fixing ring 4 is smaller than the outer diameter of the plastic diameter ring 3;

[0022] The main body 1, the base plate 2 and the fixing ring 4 of the well gauge are all made of metal, preferably stainless steel, to ensure the overall strength of the well gauge;

[0023] When the plastic diameter ring 3 is used to make diameter of the inside of the oil casing, damage to the inside of the casing is avoided;

[0024] The upper surface of the diameter gauge body 1 and the lower surface of the chassis 2 are both equipped with lifting ears, which can be used to connect the traction rope.

[0025] exist Figures 1 to 4 Middle: A positioning mechanism 5 is provided inside the diameter gauge body 1, and the positioning mechanism 5 includes a rotating rod 6, which penetrates and is rotatably connected to the upper surface of the diameter gauge body 1, and a gear 7 is installed at the lower end of the rotating rod 6. The left and right sides of the gear 7 are meshed and connected with racks 8, and the lower surface of the rack 8 is slidably connected with a slide plate 9, and the lower end of the slide plate 9 is installed on the lower surface of the inner part of the diameter gauge body 1, and a positioning member 10 is provided at the end of the rack 8 away from the gear 7. The positioning member 10 includes a positioning rod 11, and the end of the positioning rod 11 close to the rack 8 is installed on the upper surface of the rack 8, and the end of the positioning rod 11 away from the rack 8 is installed with a positioning plate 12, and the positioning plate 12 movably penetrates one side surface of the diameter gauge body 1, and the lower surface of the positioning plate 12 is in contact with the upper surface of the fixing ring 4;

[0026] The outside of the rotating rod 6 is sleeved with a ratchet 13, and the rear side of the ratchet 13 is provided with an adjustment mechanism 14. The ratchet 13 and the adjustment mechanism 14 are both located above the diameter gauge body 1. The adjustment mechanism 14 includes a spring 15, and a support block 16 is installed at the rear end of the spring 15, and a ratchet 17 is movably fitted at the front end of the spring 15. The left end of the ratchet 17 is internally rotatably connected with a support rod 18, and the lower ends of the support block 16 and the support rod 18 are both installed on the upper surface of the diameter gauge body 1;

[0027] Rotating the rotating rod 6 clockwise can drive the two racks 8 to move outward, thereby driving the positioning plate 12 to extend out of the diameter gauge body 1 and fit on the upper end of the fixing ring 4, so as to facilitate fixing the plastic diameter ring 3 between the chassis 2 and the fixing ring 4;

[0028] When the rotating rod 6 rotates clockwise, the pawl 17 will not jam the ratchet 13, so the rotating rod 6 can rotate normally; when the rotating rod 6 rotates counterclockwise, the pawl 17 jams the ratchet 13, so the rotating rod 6 cannot rotate counterclockwise, thereby fixing the position of the positioning plate 12 to prevent it from retracting into the interior of the diameter gauge body 1.

[0029] The working principle of the utility model is that when in use, the user connects the diameter gauge with a rope, slightly raises one end of the oil casing, and then puts the diameter gauge into the oil casing from the higher end for detection; when the plastic diameter ring 3 needs to be replaced after being used for many times, the user can pull the ratchet 17 outward, and then rotate the rotating rod 6 counterclockwise to drive the gear 7 to rotate, and the two racks 8 meshing with the gear 7 move toward the center position, thereby driving the positioning plate 12 to retract into the interior of the diameter gauge body 1, and then loosen the ratchet 17, take down the fixing ring 4, and then take down the plastic diameter ring 3.

[0030] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A petroleum casing diameter gauge, comprising a diameter gauge body (1), a bottom plate (2) being installed at the lower end of the diameter gauge body (1), a plastic diameter ring (3) being sleeved on the outside of the diameter gauge body (1), and a fixing ring (4) being sleeved on the outside of the diameter gauge body (1) above the plastic diameter ring (3), characterized in that: A positioning mechanism (5) is arranged inside the diameter gauge body (1), and the positioning mechanism (5) comprises a rotating rod (6), a gear (7) is installed at the lower end of the rotating rod (6), racks (8) are meshed and connected on both the left and right sides of the gear (7), a slide plate (9) is slidably connected to the lower surface of the rack (8), and a positioning member (10) is arranged at one end of the rack (8) away from the gear (7); a ratchet (13) is sleeved on the outside of the rotating rod (6), and an adjustment mechanism (14) is arranged on the rear side of the ratchet (13).

2. The oil casing diameter gauge according to claim 1 is characterized in that: The positioning member (10) comprises a positioning rod (11), and a positioning plate (12) is mounted on one end of the positioning rod (11) away from the rack (8).

3. The oil casing diameter gauge according to claim 1 is characterized in that: The adjustment mechanism (14) comprises a spring (15), a support block (16) is installed at the rear end of the spring (15), and a ratchet (17) is movably fitted at the front end of the spring (15), and a support rod (18) is rotatably connected to the left end of the ratchet (17).

4. The oil casing diameter gauge according to claim 1 is characterized in that: The outer diameter of the diameter gauge body (1) is the same as the inner diameter of the plastic diameter ring (3); the outer diameter of the plastic diameter ring (3) is larger than the outer diameter of the chassis (2); the outer diameter of the fixing ring (4) is smaller than the outer diameter of the plastic diameter ring (3); the rotating rod (6) penetrates and is rotatably connected to the upper surface of the diameter gauge body (1); the lower end of the slide plate (9) is mounted on the inner lower surface of the diameter gauge body (1); and the ratchet (13) and the adjustment mechanism (14) are both located above the diameter gauge body (1).

5. The oil casing diameter gauge according to claim 2 is characterized in that: The end of the positioning rod (11) close to the rack (8) is installed on the upper surface of the rack (8), the positioning plate (12) movably penetrates the side surface of the diameter gauge body (1), and the lower surface of the positioning plate (12) fits the upper surface of the fixing ring (4).

6. The oil casing diameter gauge according to claim 3 is characterized in that: The lower ends of the support block (16) and the support rod (18) are both mounted on the upper surface of the diameter gauge body (1).

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