Double-channel fishing joint for treating tripping of underground drilling tool of coal mine

Abstract

The utility model discloses a double-channel salvage connector for handling tripping of a drilling tool in an underground coal mine. The double-channel salvage connector comprises a salvage connector body, an alignment device and a one-way valve. The alignment device is in a conical cylinder shape, is sleeved outside the salvage joint and extends to the lower part; the one-way valve is arranged in a central channel of the salvage joint; the fishing connector is provided with a male buckle matched with a tripping drilling tool, and a plurality of radial channels are formed in the side wall of the fishing connector and communicated with an annular channel between the alignment device and the fishing connector. The alignment device is aligned with the tripping drilling tool, so that the fishing joint is accurately butted with the tripping drilling tool, one path of flushing medium flows out through the central channel, the radial channel and the annular channel, and drilling cuttings in a hole are prevented from being accumulated at a male buckle of the fishing joint when the fishing joint is tripped in, and the other path of flushing medium enters the central channel through the one-way valve; the central channel is prevented from being blocked by drilling cuttings. The device can guarantee smooth tripping of a salvage drilling tool, improves salvage success rate, and is suitable for salvage treatment of in-hole tripping accidents in underground coal mine drilling operation.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coal mine drilling construction technical field, relates to a double channel fishing adapter for handling coal mine drilling tool tripping. BACKGROUND

[0002] The coal seam underground directional drilling technology has the advantage of controllable drilling trajectory, and has been widely applied in coal mine gas control, water exploration and drilling construction of geological structure detection in recent years, and has become the main technology for drilling construction of coal mine disaster control.

[0003] In the directional drilling construction process, when drilling complex strata, it is easy to cause sticking, drill dropping and other accidents in the hole, at the same time, the misoperation of personnel is easy to cause the directional drilling tool tripping, and if the accident is not handled properly, not only serious economic losses are caused, but also the construction progress is delayed. The conventional fishing device in the existing fishing technology has low fishing success rate and is easy to cause secondary accidents. UTILITY MODEL CONTENTS

[0004] In view of the problems in the prior art, the utility model aims at providing a double channel fishing adapter for handling coal mine drilling tool tripping, solving the problems of easy plugging by drilling cuttings, difficult alignment, low fishing success rate and the like in the process of drilling with the existing fishing adapter, ensuring the smooth running of the fishing drilling tool and improving the fishing success rate.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A double channel fishing adapter for handling coal mine drilling tool tripping, comprising a fishing adapter, an alignment device and a check valve, wherein the alignment device is coaxially sleeved outside the fishing adapter, and the check valve is coaxially installed in the central channel of the fishing adapter;

[0007] The upper end of the fishing adapter is provided with a female thread to match the male thread of the fishing drill rod, and the lower end of the fishing adapter is provided with a male thread to match the female adapter of the tripped drilling tool; a radial channel is arranged on the side wall of the fishing adapter;

[0008] The alignment device is a conical cylinder structure, the upper end of which is fixed to the outer wall of the fishing adapter, and the flared section surrounds and extends below the fishing adapter; the annular channel between the inner wall of the alignment device and the outer wall of the fishing adapter is connected with the radial channel as a first flushing medium flow channel;

[0009] The check valve can guide the central channel of the fishing adapter from top to bottom as a second flushing medium flow channel.

[0010] The utility model also includes the following technical features:

[0011] Specifically, the inner wall of the upper end of the alignment device is a connecting ring table connected with the outer wall of the upper part of the fishing adapter.

[0012] Specifically, the upper end of the annular passage between the aligning device and the fishing joint is sealed by a connecting ring platform, and the lower part is open; the annular passage is communicated with the radial passage and the central passage.

[0013] Specifically, the upper end of the aligning device is connected with the outer wall of the fishing joint in a screw thread connection mode.

[0014] Specifically, the radial passage is located below the connecting position of the aligning device and the fishing joint.

[0015] Specifically, the radial passage is multiple and is uniformly distributed along the circumference of the fishing joint.

[0016] Specifically, the outer wall of the one-way valve is fixedly attached to the inner wall of the fishing joint.

[0017] Specifically, the one-way valve is located below the radial passage.

[0018] Compared with the prior art, the utility model has the following technical effects:

[0019] The utility model discloses a double-channel fishing joint for handling coal mine underground drilling tool tripping, and a aligning device is added to the front end of the fishing joint public buckle, when using, the aligning device is used to align with the tripped drilling tool, so that the fishing joint is accurately connected with the tripped drilling tool, meanwhile, one flushing medium flows out from the annular gap between the fishing joint and the aligning device, avoids that the hole drilling cuttings are accumulated at the fishing joint public buckle when the fishing joint is lowered, another flushing medium enters the central passage from the one-way valve, avoids that the central passage of the fishing joint is blocked by the drilling cuttings, the double-channel design solves the problem that the fishing joint is easily blocked by the drilling cuttings during the drilling process, guarantees the smooth lowering of the fishing drilling tool, improves the fishing success rate, and is suitable for coal mine underground drilling operation hole tripping accident fishing treatment. DRAWINGS

[0020] Figure 1 It is the whole structure section schematic view of the utility model.

[0021] Figure 2 It is the whole structure A-A section view of the utility model.

[0022] The meanings of various reference numerals in the drawing are as follows:

[0023] 1. aligning device, 2. fishing joint, 3. one-way valve, 4. central passage, 5. annular passage, 6. radial passage. PREFERRED EMBODIMENT

[0024] The following gives the specific embodiment of the utility model, and it is explained that the utility model is not limited to the following specific embodiment, and equivalent transformations made on the basis of the technical scheme of the application all fall into the protection scope of the utility model.

[0025] Embodiment 1:

[0026] As shown in the figure, the embodiment provides a double-channel fishing joint for handling coal mine underground drilling tool tripping, which comprises a fishing joint 2, an aligning device 1 and a one-way valve 3. Figure 1 The aligning device 1 is coaxially sleeved outside the fishing joint 2, and the one-way valve 3 is coaxially installed in the central channel 4 of the fishing joint 2.

[0027] The upper end of the fishing joint 2 is provided with a female thread to match the male thread of a fishing drill rod, and the lower end of the fishing joint 2 is provided with a male thread to match the female joint of a tripped drilling tool.

[0028] The aligning device 1 is a conical cylinder structure, the upper end of which is fixed to the outer wall of the fishing joint 2, and the flared end surrounds and extends below the fishing joint 2.

[0029] The one-way valve 3 can guide the central channel 4 of the fishing joint 2 from top to bottom to serve as a second flushing medium flow channel.

[0030] The aligning device 1 is aligned with the tripped drilling tool at the front end of the male thread of the fishing joint 2, so that the fishing joint 2 is accurately connected with the tripped drilling tool.

[0031] The inner wall of the upper end of the aligning device 1 is a connecting ring platform to connect with the outer wall of the upper part of the fishing joint 2.

[0032] The upper end of the annular gap 5 between the aligning device 1 and the fishing joint 2 is sealed by the connecting ring platform, and the lower part is open.

[0033] The upper end of the aligning device 1 and the outer wall of the fishing joint 2 are connected by screw threads to realize the fixed connection between the aligning device 1 and the fishing joint 2.

[0034] The radial channel 6 is located below the connection between the aligning device 1 and the fishing joint 2 to realize the communication of the annular gap 5 with the radial channel 6 and the central channel 4.

[0035] The radial channels 6 are multiple and evenly distributed along the circumference of the fishing joint 2. More specifically, four radial channels 6 are provided in the embodiment.

[0036] The outer wall of the one-way valve 3 is fixedly attached to the inner wall of the fishing joint 2, so that the one-way valve 3 can guide the flow of the second flushing medium from top to bottom through the central channel 4 of the fishing joint 2 as a second flushing medium flow channel. The flushing medium flows out in sequence through the central channel 4, the one-way valve 3 and the lower part of the central channel 4, thereby avoiding the central channel 4 of the fishing joint 2 being blocked by drill cuttings.

[0037] The one-way valve 3 is located below the radial channels 6, ensuring that the first flushing medium flow channel and the second flushing medium flow channel are unobstructed respectively. This double-channel design solves the problem that the fishing joint 2 is easily blocked by drill cuttings during the drilling process.

[0038] The aligning device 1, the fishing joint 2 and the one-way valve 3 are integrally formed in the embodiment.

[0039] In use, the following steps are included:

[0040] Step 1: Connect the fishing joint with the fishing drill pipe;

[0041] Step 2: Use the drilling machine to send the fishing joint and the fishing drill pipe into the hole, and open the flushing medium to flush the hole every 20-50m;

[0042] Step 3: When the fishing joint encounters a tripped drill tool, open the flushing medium to flush the hole and clean the drill cuttings;

[0043] Step 4: Rotate the fishing drill pipe with the drilling machine, and use the aligning device to pull the tripped drill tool into the fishing joint horn;

[0044] Step 5: Continue to rotate the fishing drill pipe to connect the fishing joint pin with the tripped drill tool box;

[0045] Step 6: Take out the fishing drill pipe and the tripped drill tool from the hole.

[0046] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all belong to the protection scope of the present application.

[0047] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application does not further describe various possible combinations.

[0048] In addition, various different embodiments of the present application can be combined arbitrarily, as long as they do not violate the spirit of the present application, and should be considered as disclosed by the present application.

Claims

1. A dual pass fishing tool for handling coal mine downhole drill string trip offs, characterized by, It comprises a fishing joint (2), an aligning device (1) and a one-way valve (3); the aligning device (1) is coaxially sleeved on the fishing joint (2), and the one-way valve (3) is coaxially installed in the central passage (4) of the fishing joint (2); The upper end of the fishing joint (2) is provided with a female thread to match with a male thread of a fishing drill pipe, and the lower end of the fishing joint (2) is provided with a male thread to match with a female joint of a tripping tool; a radial passage (6) is arranged on the side wall of the fishing joint (2); The aligning device (1) is a conical cylinder structure, the upper end of which is fixed on the outer wall of the fishing joint (2), and the flared section surrounds and extends below the fishing joint (2); the annular passage (5) between the inner wall of the aligning device (1) and the outer wall of the fishing joint (2) is connected with the radial passage (6) to serve as a first flushing medium flow passage; The one-way valve (3) can conduct the central passage (4) of the fishing joint (2) from top to bottom to serve as a second flushing medium flow passage.

2. The dual pass-through fishing tool for handling coal mine downhole drill string tripping out as claimed in claim 1, wherein, The inner wall of the upper end of the aligning device (1) is a connecting ring platform to connect with the outer wall of the upper part of the fishing joint (2).

3. A dual pass-through fishing tool for handling coal mine downhole drill string trip offs as defined in claim 2, characterised in that, The upper end of the annular passage (5) between the aligning device (1) and the fishing joint (2) is sealed by the connecting ring platform, and the lower part is open; the annular passage (5) is connected with the radial passage (6) and the central passage (4).

4. The dual pass-through fishing tool for handling coal mine downhole drill string tripping of claim 1, wherein, The connecting mode of the upper end of the aligning device (1) and the outer wall of the fishing joint (2) is a screw connection.

5. The dual pass-through fishing tool for handling coal mine downhole drill string tripping of claim 1, wherein, The radial passage (6) is located below the connection between the aligning device (1) and the fishing joint (2).

6. The dual pass-through fishing tool for handling coal mine downhole drill string tripping of claim 1, wherein, There are multiple radial passages (6) which are evenly distributed along the circumference of the fishing joint (2).

7. The dual pass-through fishing tool for handling coal mine downhole drill string tripping of claim 1, wherein, The outer wall of the one-way valve (3) is tightly fixed to the inner wall of the fishing joint (2).

8. The dual pass-through fishing tool for handling coal mine downhole drill string tripping of claim 1, wherein, The one-way valve (3) is located below the radial passage (6).

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