High-definition peeping device for top plate hydraulic fracturing drilling

Abstract

The utility model discloses a high-definition peeping device for top plate hydraulic fracturing drilling. The high-definition peeping device comprises an anti-collision protection head, a flow guide pipe and a drainage protection cover which are sequentially connected from top to bottom. The anti-collision protection head, the flow guide pipe and the drainage protection cover are connected through thread structures, and the lower portion of the drainage protection cover is connected with drilling peeping equipment. The water collecting tank is arranged at the joint of the drainage protection cover and the flow guide pipe, water flow left from the top can be collected, water flow drainage is conducted through the drainage tank, meanwhile, the drainage protection cover is integrally designed to be in a cone frustum shape, and water flow which does not enter the water collecting tank can be directly shunted; meanwhile, the external material is a rubber material, the outer diameter of the bottom is larger than the outer diameter of the peeping equipment, the top and lateral anti-collision function can be achieved, and rock debris and the like in the hole are prevented from directly falling on the transparent protective cover around the peeping probe to cause damage.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal rock mass drilling auxiliary equipment, and in particular relates to a high-definition peeping device for roof hydraulic fracturing drilling. Background Art

[0002] In recent years, underground hydraulic fracturing technology has become one of the main means of coal mine roof management. After the roof hydraulic fracturing is completed, the fracturing holes need to be observed. The borehole peeping equipment can be used to observe the distribution of cracks in the surrounding rock of the borehole after the adoption of roof hydraulic fracturing technology measures, which provides intuitive feedback on the hydraulic fracturing effect and plays a vital role in the weakening of the mine roof integrity and the evaluation of the hydraulic fracturing effect. However, since the rock formations used for hydraulic fracturing are mostly sandstone layers, which have a strong water-holding capacity, and after hydraulic fracturing, when the hydraulic fracturing string is withdrawn, the water pressure in the hole decreases, and the water in the cracks flows out to the hole wall. The rock powder and rock cuttings in the hole flow out with the water to the hole wall. During the drilling peeping process, the water flow in the hole accompanied by rock powder and rock cuttings is easy to cover the lens, resulting in a decrease in the peeping clarity. At the same time, when the drilling peeping equipment is continuously transporting the peeping into the hole, it is very easy to collide with the hole wall. When the larger rock cuttings in the hole rub against the peeping equipment, it is very easy to cause damage to the peeping equipment. Therefore, how to reduce the impact of the water flow containing rock powder and rock cuttings in the hole on the lens and reduce the friction of the rock cuttings on the equipment when transporting the peeping equipment into the hole, and improve the peeping imaging effect is an urgent problem to be solved. Utility Model Content

[0003] The utility model aims to provide a high-definition viewing device for roof hydraulic fracturing drilling, which solves the problem that the existing drilling viewing equipment is easily affected by the water flow in the hole and the equipment is damaged by rock cuttings wear.

[0004] The technical solution adopted by the utility model is: a high-definition peeping device for roof hydraulic fracturing drilling, comprising an anti-collision protection head, a guide pipe and a drainage protection cover connected in sequence from top to bottom; the anti-collision protection head, the guide pipe and the drainage protection cover are connected to each other by a threaded structure; the drilling peeping device is connected below the drainage protection cover.

[0005] The utility model is also characterized in that:

[0006] The anti-collision protection head is designed to be hemispherical, which plays an anti-collision role while slowing down the water flow falling on the upper part and guiding it to slide down to the diversion pipe below. The diversion pipe wall is designed with a diversion groove, which can divert the water flow that slides down to the backflow pipe and reduce the water flow speed. The water flows through the diversion groove and finally flows to the drainage protection cover. A water collection trough is provided at the connection between the drainage protection cover and the diversion pipe, which can collect the water flow left from the top and release the water flow through the drainage groove designed on the drainage protection cover. At the same time, the overall design of the drainage protection cover is a truncated cone, which can directly divert the water flow that does not enter the water collection trough, protecting the peep probe below from the attachment of rock powder and rock debris in the hole, resulting in a decrease in the clarity of the peep. At the same time, its outer layer is made of rubber material, and the outer diameter of the bottom is larger than the outer diameter of the peep device, which can play a lateral anti-collision function, preventing the rock debris in the hole from falling directly on the transparent protective cover around the peep probe and causing damage.

[0007] The flow guide pipe is cylindrical, and the anti-collision protection head has the same outer diameter as the flow guide pipe.

[0008] The outer layers of the anti-collision protection head, guide pipe and drainage protection cover are all rubber components, and the inner parts are all metal parts.

[0009] The anti-collision protection head includes internal metal parts of the anti-collision protection head, the guide pipe includes internal metal parts of the guide pipe, and the drainage protection cover includes internal metal parts of the drainage protection cover; the internal metal parts of the anti-collision protection head, the internal metal parts of the guide pipe and the internal metal parts of the drainage protection cover are all connected by threads.

[0010] The peeping device comprises a peeping device body, a peeping transparent protective cover is arranged on the upper part of the peeping device body, a peeping probe is arranged inside the peeping transparent protective cover, and the peeping transparent protective cover is threadedly connected with the drainage protective cover.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) The utility model has a simple structure. A water-conducting protective cover is installed at the front end of the drilling peek device. When the hydraulic fracturing drilling peek is performed, the water flow in the hole can be collected and diverted to prevent rock powder and rock debris from adhering to the equipment through the water flow, thereby improving the clarity of the peek image.

[0013] (2) The outer layer of the water-conducting protective cover of the utility model is made of rubber material, which prevents the peeping equipment from having frictional contact with the rock cuttings in the hole, thereby reducing unnecessary loss of the equipment.

[0014] (3) The top anti-collision head of the utility model is made of rubber material, which can improve the anti-collision ability of the peeping device in the hole wall, and is combined with the guide tube to form a bullet shape, and the tail drainage protection cover is a conical shape with a small top and a large bottom, which is convenient for the peeping device to extend deep into the borehole without affecting the feeding of the peeping device. At the same time, the rubber material of the outer layer of the anti-collision head and the drainage protection cover can effectively reduce the impact of the rock walls in front of and on both sides of the borehole during the peeping process, thereby facilitating the peeping operation.

[0015] (4) The anti-collision head and water pouring protection cover of the utility model are made of relatively cheap rubber materials and can be disassembled and replaced, so they can adapt to hydraulic fracturing holes of different diameters. In addition, the rubber material is inexpensive and can be easily replaced after being worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a high-definition peeping device for top plate hydraulic fracturing drilling.

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure looking down on the AA surface.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the anti-collision protection head.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the guide tube.

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the drainage protection cover.

[0021] In the figure, 1-anti-collision protection head, 2-guiding pipe, 3-drainage protection cover, 4-guiding groove, 5-collecting groove, 6-drainage groove, 7-peeping transparent protection cover, 8-peeping probe, 9-peeping device body, 10-internal metal parts of anti-collision protection head, 11-internal metal parts of guiding pipe, 12-internal metal parts of drainage protection cover. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Example 1

[0024] The utility model embodiment provides a high-definition viewing device for roof hydraulic fracturing drilling, such as Figure 1 As shown, it includes an anti-collision protection head 1, a guide pipe 2 and a drainage protection cover 3 which are connected in sequence from top to bottom; the anti-collision protection head 1, the guide pipe 2 and the drainage protection cover 3 are connected to each other using a threaded structure; and a drilling peep device is connected below the drainage protection cover 3.

[0025] The anti-collision protection head 1 is designed to be hemispherical, the wall of the guide pipe 2 is designed with a radial spiral guide groove 4 surrounding the guide pipe, a water collecting trough 5 is provided at the connection between the drainage protection cover 3 and the guide pipe 2, and the water collecting trough 5 is connected to the drainage groove 6 designed on the drainage protection cover; the drainage protection cover 3 is designed as a truncated cone as a whole, which can directly divert the water flow that has not entered the water collecting trough 5.

[0026] The flow guide pipe 2 is cylindrical, and the anti-collision protection head 1 has the same outer diameter as the flow guide pipe.

[0027] like Figure 3-5 As shown, the anti-collision protection head 1, the guide pipe 2 and the drainage protection cover 3 respectively include internal metal components, and the metal components are connected by threads; the outer layers are all rubber components.

[0028] The peeping device comprises a peeping device body 9 , a peeping transparent protective cover 7 is arranged on the upper part of the peeping device body 9 , a peeping probe 8 is arranged inside the peeping transparent protective cover 7 ; the peeping transparent protective cover 7 is threadedly connected to the drainage protective cover 3 .

[0029] The peep probe 8 will not be affected by the scouring effect of the water flow under the protection of the upper drainage protection cover 3, and can reflect the situation in the borehole more clearly.

[0030] The anti-collision protection head 1 includes an internal metal part 10 of the anti-collision protection head, the flow guide tube 2 includes an internal metal part 11 of the flow guide tube, and the drainage protection cover 3 includes an internal metal part 12 of the drainage protection cover; the internal metal parts 10 of the anti-collision protection head, the internal metal parts 11 of the flow guide tube, and the internal metal parts 12 of the drainage protection cover are all connected by threads. The rubber components on the outer layers of the anti-collision protection head 1, the flow guide tube 2, and the drainage protection cover 3 prevent the peeping device from being damaged due to collision during operation.

[0031] The rubber of the outer layer of the drainage protection cover 3 is hard rubber material.

[0032] Example 2

[0033] Based on Example 1,

[0034] The drainage protection cover 3 of the utility model is in the shape of a truncated cone, and a water collecting tank 5 is arranged on the top. The inner diameter of the water collecting tank 5 is the same as the outer diameter of the guide pipe.

[0035] The guide grooves 4 are distributed on the outer rubber layer of the guide pipe 2; the water with dust flows downstream through the hemispherical anti-collision protection head 1 and enters the water collection groove 5 on the upper part of the drainage protection cover through the guide groove of the guide pipe. The water collection groove 5 is connected with the drainage groove 6, and the water flows out along the drainage groove;

[0036] like Figure 2 As shown, there are multiple drainage grooves 6, which are evenly distributed on the rubber surface of the outer wall of the drainage protection cover and extend downward in a spiral shape.

[0037] Example 3

[0038] The utility model is a method for using a high-definition peek device for roof hydraulic fracturing drilling, and the specific operating steps are as follows:

[0039] Step 1: Assemble the anti-collision protection head, guide pipe and drainage protection cover and connect them to the front end of the peeping device.

[0040] Step 2: Conduct normal observation of the hydraulic fracturing hole. The anti-collision protection head can guide the top water flow to the diversion pipe while preventing collision. The water in the diversion pipe flows into the water collection tank below through the diversion groove, and the water is discharged to the surrounding through the drainage groove, so that the water containing rock powder and rock debris cannot affect the peeping equipment, achieving a clearer peeping effect;

[0041] The outer layer of the anti-collision protection head, guide pipe and drainage protection cover is made of rubber material, which can cushion the rock cuttings falling in the hole. The outer diameter of the drainage protection cover is larger than the outer diameter of the peeping device, which can prevent the hole wall from directly contacting the transparent protection cover around the peeping probe and causing scratches and other damage, thereby improving the clarity of observation.

[0042] Step 3: After the observation, remove the anti-collision protection head, guide pipe and drainage protection cover, rinse, wipe and dry them. If they are found to be damaged, the rubber components can be removed and replaced.

[0043] The utility model uses the above embodiments to illustrate the detailed devices and methods of the utility model, but the utility model is not limited to the above detailed devices and methods, that is, it does not mean that the utility model must rely on the above detailed devices and methods to be implemented. The technicians in the relevant technical field should understand that any improvement to the utility model, the equivalent replacement of the device of the utility model, the addition of auxiliary devices, the selection of specific methods, etc., all fall within the protection scope and disclosure scope of the utility model.

Claims

1. A high-definition viewing device for roof hydraulic fracturing drilling, characterized in that: It comprises an anti-collision protection head (1), a flow guide pipe (2) and a drainage protection cover (3) which are connected in sequence from top to bottom; the anti-collision protection head (1), the flow guide pipe (2) and the drainage protection cover (3) are connected to each other by means of a threaded structure; and a drilling peep device is connected below the drainage protection cover (3).

2. The high-definition viewing device for roof hydraulic fracturing drilling according to claim 1 is characterized in that: The anti-collision protection head (1) is designed to be hemispherical, the wall of the guide pipe (2) is designed to be provided with a spiral guide groove (4) surrounding the guide pipe in a radial direction, a water collecting groove (5) is provided at the connection between the drainage protection cover (3) and the guide pipe (2), and the water collecting groove (5) is connected to the drainage groove (6) designed on the drainage protection cover; the drainage protection cover (3) is designed as a truncated cone as a whole.

3. The high-definition viewing device for roof hydraulic fracturing drilling according to claim 1 is characterized in that: The flow guide tube (2) is cylindrical, and the anti-collision protection head (1) has the same outer diameter as the flow guide tube.

4. The high-definition viewing device for roof hydraulic fracturing drilling according to claim 1 is characterized in that: The anti-collision protection head (1), the flow guide pipe (2) and the drainage protection cover (3) respectively include internal metal components, and the metal components are connected by threads; the outer layers are all rubber components.

5. The high-definition viewing device for roof hydraulic fracturing drilling according to claim 1, characterized in that: The peeping device comprises a peeping device body (9), a peeping transparent protective cover (7) is arranged on the upper part of the peeping device body (9), and a peeping probe (8) is arranged inside the peeping transparent protective cover (7); the peeping transparent protective cover (7) is threadedly connected to the drainage protective cover (3).

6. The high-definition viewing device for roof hydraulic fracturing drilling according to claim 4, characterized in that: The anti-collision protection head (1) comprises an internal metal part (10) of the anti-collision protection head, the flow guide tube (2) comprises an internal metal part (11) of the flow guide tube, and the drainage protection cover (3) comprises an internal metal part (12) of the drainage protection cover; the internal metal part (10) of the anti-collision protection head, the internal metal part (11) of the flow guide tube, and the internal metal part (12) of the drainage protection cover are all connected by threads.

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