A lost circulation prevention device

Abstract

The utility model discloses a kind of anti-drilling devices, it is related to well drilling equipment technical field, including bearing disc, the upper end of the bearing disc is equipped with upper ring, the lower end of the bearing disc is equipped with connecting seat, the connecting seat is equipped with external thread, the bearing disc two sides are symmetrically equipped with two bearing silk rods, the bearing disc is equipped with mounting cavity, rotating bearing and pressure bearing are equipped in the mounting cavity, rotating bearing and pressure bearing are installed on the drill rod connecting section, the utility model is matched with the bearing silk rod of symmetrical arrangement by bearing disc, the quick support and fixed of drill rod are realized;The combination of rotating bearing and pressure bearing is set in mounting cavity simultaneously, radial and axial load can be simultaneously borne;And the design of variable silk handle at the both ends of drill rod connecting section enhances universality, and different specifications of drill rod components can be quickly matched, to reach the comprehensive effect that structure is simple, anti-drilling effect is remarkable and adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, specifically a device to prevent drill bit runaway. Background Technology

[0002] In drilling operations, drilling rig stability is one of the key factors ensuring drilling success. However, during drilling rig stops or coring, various forces, such as the weight of the drill pipe, formation reaction forces, and rig vibrations, can easily cause the drill pipe to run away. This not only affects the drilling progress but can also damage drilling equipment and even lead to safety accidents. To address this problem, various anti-runaway devices have emerged in existing technologies. However, most of these devices are complex in structure, inconvenient to install, and have limited effectiveness in preventing runaway.

[0003] Based on this, a drill-running prevention device is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0004] The purpose of this invention is to provide a device to prevent drill runaway, so as to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A drill bit anti-runaway device includes a support plate, an upper support ring at the upper end of the support plate, a connecting seat at the lower end of the support plate, an external thread on the connecting seat, two symmetrically arranged support screws on both sides of the support plate, an installation cavity inside the support plate, a rotary bearing and a pressure bearing inside the installation cavity, and a drill rod connecting section installed on the rotary bearing and the pressure bearing.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0008] In one alternative embodiment: the load-bearing screw includes two ear plates symmetrically fixed on both sides of the load-bearing plate, the ear plates are threaded with a screw, the screw is threaded with a fastening nut and an anti-reverse nut, and the lower end of the screw is fixedly connected to a base.

[0009] In one alternative: the rotary bearing is a deep groove ball bearing, and the pressure bearing is a thrust plane bearing.

[0010] In one alternative: both the upper and lower ends of the drill pipe connecting section are provided with threaded connectors that are connected to the drill pipe components.

[0011] In one alternative: a labyrinth-type sealing structure is provided at the contact position between the load-bearing plate and the drill pipe connection section.

[0012] In one alternative: a grease nipple for adding lubricant is provided on one side of the mounting cavity, and a sealing plug is provided at the grease nipple.

[0013] In one alternative: the lower end of the load-bearing plate is provided with a foldable stabilizing seat, the foldable stabilizing seat includes a mounting seat threadedly connected to a connecting seat, and three supporting members are distributed circumferentially on the mounting seat.

[0014] In one alternative embodiment: the support member includes a first support rod and a second support rod hinged to the mounting base. The first support rod is provided with a sliding groove, and a plurality of support slots are linearly arranged on one side of the sliding groove. One end of the second support rod is slidably disposed in the sliding groove. A fixing bolt is provided at the end of the second support rod near the first support rod. A fixing seat is rotatably connected to one end of the first support rod, and a ground nail is provided on the fixing seat.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model achieves rapid support and fixation of the drill rod by cooperating with the load-bearing plate and symmetrically arranged load-bearing screws, simplifying the structure and facilitating installation; at the same time, the combination of rotary bearings and pressure bearings in the installation cavity can simultaneously withstand radial and axial loads, significantly improving the anti-drill run capability without affecting the normal rotation of the drill rod; and the variable thread joint design at both ends of the drill rod connection section enhances versatility, allowing for quick matching of drill rod components of different specifications, thus achieving a comprehensive effect of simple structure, significant anti-drill run effect, and strong adaptability.

[0017] 2. This utility model achieves effective dustproof sealing, extends bearing service life, and facilitates daily lubrication and maintenance through a labyrinth-type sealing structure and grease fitting maintenance design.

[0018] 3. This utility model achieves the effect of enhancing the overall stability of the device, facilitating storage and transportation, and quickly adapting to different ground conditions through the design of the foldable stabilizing seat at the lower end of the connecting seat. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0020] Figure 2 This is a schematic diagram of the load-bearing plate in Example 1.

[0021] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0022] Figure reference numerals: 100, bearing plate; 101, upper support ring; 102, connecting seat; 103, external thread; 104, mounting cavity; 105, labyrinth seal structure; 106, grease nipple; 107, sealing plug; 200, bearing screw; 201, ear plate; 202, screw; 203, fastening nut; 204, anti-reverse nut; 205, base; 300, rotary bearing; 400, pressure bearing; 500, drill pipe connecting section; 600, folding stabilizer; 601, mounting seat; 602, support component; 603, first support rod; 604, second support rod; 605, slide groove; 606, support groove; 607, fixing bolt; 608, fixing seat; 609, ground nail. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] In one embodiment, such as Figure 1 and Figure 2 As shown, an anti-drill runaway device includes a support plate 100, an upper support ring 101 at the upper end of the support plate 100, a connecting seat 102 at the lower end of the support plate 100, an external thread 103 on the connecting seat 102, two symmetrically arranged load-bearing screws 200 on both sides of the support plate 100, an installation cavity 104 inside the support plate 100, a rotary bearing 300 and a pressure bearing 400 inside the installation cavity 104, and a drill rod connecting section 500 installed on the rotary bearing 300 and the pressure bearing 400. The load-bearing screw 200 includes two ear plates 201 symmetrically fixed on both sides of the support plate 100, a screw 202 threadedly connected to the ear plates 201, a fastening nut 203 and an anti-reverse nut 204 threadedly connected to the screw 202, and a base 205 fixedly connected to the lower end of the screw 202. The rotary bearing 300 is a deep groove ball bearing, and the pressure bearing 400 is a thrust plane bearing. Both the upper and lower ends of the drill rod connecting section 500 are equipped with threaded connectors that connect to the drill rod components. The contact position between the load-bearing plate 100 and the drill rod connecting section 500 is equipped with a labyrinth-type sealing structure 105. During installation, the load-bearing plate 100 is connected to the drill rig chuck jaws via the load-bearing screw 200, and the upper end of the drill rod connecting section 500 is connected to the drill rod components. Then, the lower end of the drill rod connecting section 500 is connected to the drill rod. During use, the base 205 supports the entire device. The drill rod components drive the drill rod connecting section 500 and the drill rod to rotate together. The rotary bearing 300 ensures the rotation of the drill rod connecting section 500, and the pressure bearing 400 bears the vertical pressure of the drill rod connecting section 500.

[0026] In one embodiment, such as Figure 2As shown, a grease nipple 106 for adding lubricant is provided on one side of the mounting cavity 104. A sealing plug 107 is provided at the grease nipple 106. During use, lubricant is periodically added into the mounting cavity 104 through the grease nipple 106 to ensure that the rotary bearing 300 and the pressure bearing 400 are in good lubrication condition.

[0027] The above embodiments disclose a drill bit anti-runaway device. By cooperating with the load-bearing plate 100 and the symmetrically arranged load-bearing screws 200, the drill rod can be quickly supported and fixed, simplifying the structure and facilitating installation. At the same time, the combination of rotary bearing 300 and pressure bearing 400 in the mounting cavity 104 can simultaneously withstand radial and axial loads, significantly improving the anti-runaway capability without affecting the normal rotation of the drill rod. The variable thread joint design at both ends of the drill rod connecting section 500 enhances versatility and can quickly match drill rod components of different specifications, thus achieving a comprehensive effect of simple structure, significant anti-runaway effect and strong adaptability.

[0028] Example 2

[0029] The difference from Example 1 is that, as Figure 3 As shown, the lower end of the load-bearing plate 100 is provided with a foldable stabilizing seat 600. The foldable stabilizing seat 600 includes a mounting seat 601 threadedly connected to the connecting seat 102. Three support members 602 are distributed circumferentially on the mounting seat 601. Each support member 602 includes a first support rod 603 and a second support rod 604 hinged to the mounting seat 601. The first support rod 603 is provided with a sliding groove 605. Several support grooves 606 are linearly arranged on one side of the sliding groove 605. One end of the second support rod 604 is slidably disposed in the sliding groove 605. A fixing bolt 607 is provided at the end of the second support rod 604 near the first support rod 603. One end of the first support rod 603 is rotatably connected to a fixed seat 608, and the fixed seat 608 is provided with a ground nail 609. In use, the foldable stabilizer 600 is threadedly connected to the lower end of the load-bearing plate 100 through the mounting seat 601. Then, the first support rod 603 is rotated, and at the same time, one end of the second support rod 604 slides along the slide groove 605 until the fixed seat 608 is supported on the ground. Then, one end of the second support rod 604 is inserted into the support groove 606. Next, the fixing bolt 607 is tightened to fix the second support rod 604. Then, the ground nail 609 is pushed into the ground, so that the foldable stabilizer 600 is stably supported on the ground.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for preventing drill runaway, characterized in that, The device includes a load-bearing plate (100), an upper support ring (101) at the upper end of the load-bearing plate (100), a connecting seat (102) at the lower end of the load-bearing plate (100), an external thread (103) on the connecting seat (102), two load-bearing screws (200) symmetrically arranged on both sides of the load-bearing plate (100), an installation cavity (104) inside the load-bearing plate (100), a rotary bearing (300) and a pressure bearing (400) inside the installation cavity (104), and a drill pipe connecting section (500) installed on the rotary bearing (300) and the pressure bearing (400).

2. The anti-drill-running device according to claim 1, characterized in that, The load-bearing lead screw (200) includes two ear plates (201) symmetrically fixed on both sides of the load-bearing plate (100). A lead screw (202) is threaded onto the ear plates (201). A fastening nut (203) and an anti-reverse nut (204) are threaded onto the lead screw (202). A base (205) is fixedly connected to the lower end of the lead screw (202).

3. The anti-drill-running device according to claim 1, characterized in that, The rotary bearing (300) is a deep groove ball bearing, and the pressure bearing (400) is a thrust plane bearing.

4. The anti-drill-running device according to claim 1, characterized in that, Both ends of the drill pipe connecting section (500) are provided with threaded connectors that are connected to the drill pipe components.

5. The anti-drill-running device according to claim 1, characterized in that, The contact position between the load-bearing plate (100) and the drill rod connecting section (500) is provided with a labyrinth-type sealing structure (105).

6. The anti-drill-running device according to claim 1, characterized in that, The mounting cavity (104) is provided with a grease nipple (106) for adding lubricant on one side, and a sealing plug (107) is provided at the grease nipple (106).

7. The anti-drill-running device according to claim 1, characterized in that, The lower end of the load-bearing plate (100) is provided with a foldable stabilizing seat (600), which includes a mounting seat (601) threadedly connected to the connecting seat (102), and three support members (602) are distributed around the circumference of the mounting seat (601).

8. The anti-drill-running device according to claim 7, characterized in that, The support member (602) includes a first support rod (603) and a second support rod (604) hinged to the mounting base (601). The first support rod (603) is provided with a sliding groove (605). A plurality of support grooves (606) are linearly arranged on one side of the sliding groove (605). One end of the second support rod (604) is slidably disposed in the sliding groove (605). A fixing bolt (607) is provided on the end of the second support rod (604) near the first support rod (603). A fixing seat (608) is rotatably connected to one end of the first support rod (603). A ground nail (609) is provided on the fixing seat (608).

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