Auxiliary casing running device for bedding drilling
By designing the horizontal drilling auxiliary lower casing device of the rod body and hollow structure heavy hammer, the problem of difficulty in entering the casing in the coal seam is solved, and the convenient operation and high safety of the vertical drilling lower casing is achieved, which simplifies the The construction process and reduces safety risks.
Patent Information
- Application Number
- CN202323595510.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-26
AI Technical Summary
In coal seams with high ground stress, high gas, and poor breathability, it is difficult to get out of the casing after the layer drilling construction. In the existing technology, such as pipe drilling process or using copper hammers to knock, there are troublesome operation, high cost and safety risks. Big problem.
A layer-layer drilling auxiliary lower casing device including a rod body and a hollow structure heavy hammer is designed. The rod body is inserted into the sleeve and the principle of knocking or slamming with a heavy hammer is used to ensure that the lower casing is in the hole, and the device structure is simple. , easy to operate and small safety risks.
It effectively solves the problem of casing under the layer drilling, which is convenient to operate, high safety, and is simple to carry and assemble.
Smart Images
Figure CN222141158U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of coal mine gas extraction, in particular to a layer-drilling auxiliary casing device. Background Art
[0002] Some coal seams in mining areas are characterized by high ground stress, high gas content, and poor permeability, making gas control difficult. For this type of coal seam gas control, it is necessary to construct boreholes along the layer to eliminate the sudden gas before mining. In order to achieve the gas extraction effect, the drilling must be protected by casing throughout the entire process. The average depth of the borehole along the layer is in the range of 100 to 140 meters. Due to the collapse of the borehole and the poor slag discharge during construction, there is often great resistance during the casing process, and it is difficult to smoothly insert the casing on site.
[0003] At present, in order to solve the problem of difficulty in lowering casing after the completion of the in-layer drilling construction, one way is to adopt the follow-the-pipe drilling process, but the follow-the-pipe drilling process requires replacing the ordinary drill bit with an open-and-closed drill bit, replacing the ordinary drill rod with a full-diameter drill rod, and replacing the ordinary casing with a coil, which is troublesome to operate and has a high investment cost. Another way is to use a copper hammer to knock when lowering the casing, but in the process of knocking, it is very easy for the hammer head to fall off or hit the wrong side and injure people, which poses a great safety risk. Utility Model Content
[0004] The technical problem to be solved by the utility model is how to safely and conveniently carry out the auxiliary casing installation by drilling holes in the layer.
[0005] The utility model solves the above technical problems through the following technical means: a device for assisting casing installation in layer drilling, including a rod body and a weight; the rod body can be inserted into the casing; the weight is a hollow structure, and the rod body can pass through the weight. Before use, the rod body is passed through the weight to complete the assembly. After assembly, one person on site holds one side of the rod body and inserts the other side of the rod body into the sealing casing. Then another person on site hits the casing with a weight, or swings the hammer using the drop hammer principle to ensure that the casing can be lowered into the hole. After use, the device is removed. The device can effectively solve the problem of casing installation in layer drilling; the structure is simple, easy to carry and assemble; easy to operate, and has low safety risks.
[0006] As an optimized technical solution, the in-layer drilling auxiliary casing device also includes a handle, which is welded to the outer side of the weight. The handle is provided to facilitate the use of the weight.
[0007] As an optimized technical solution, the handle is made of iron.
[0008] As an optimized technical solution, the in-layer drilling auxiliary casing device also includes a baffle, and the rod body passes through the center of the baffle and is welded to the baffle. The baffle can prevent the rod body from falling into the casing when it is not held firmly.
[0009] As an optimized technical solution, the baffle is made of a circular iron sheet.
[0010] As an optimized technical solution, the rod body is made of an iron pipe.
[0011] As an optimized technical solution, the heavy hammer is a cylindrical iron block.
[0012] The advantages of the utility model are:
[0013] 1. The device can effectively solve the problem of casing installation in layer drilling; it has a simple structure, is easy to carry and assemble; it is easy to operate and has low safety risks.
[0014] 2. Set a handle to facilitate the use of the heavy hammer.
[0015] 3. The baffle can prevent the rod from falling into the sleeve when it is not held firmly. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of a casing lowering device for assisting in layer drilling in an embodiment of the utility model. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0018] like Figure 1 As shown, an embodiment of the utility model discloses a casing installation device for assisting in layer drilling, comprising a rod body 1, a weight 2, a handle 3 and a baffle 4.
[0019] The rod body 1 can be inserted into the sleeve, and the rod body 1 adopts an iron pipe with a diameter of 15mm and a length of 2m; the heavy hammer 2 adopts a cylindrical iron block with a length of 150mm, and the weight of the heavy hammer 2 is about 4Kg; the heavy hammer 2 is a hollow structure, and the rod body 1 can pass through the heavy hammer 2; the handle 3 is made of iron, and the handle 3 is welded to the outer side of the heavy hammer 2; the baffle 4 adopts a round iron sheet with a diameter of 100mm and a thickness of about 4mm. The rod body 1 passes through the center of the baffle 4 and is welded to the baffle 4, and the position of the baffle 4 is about one-fourth of the length of the rod body 1.
[0020] How to use the device: Before use, pass the longer side of the rod body 1 located on the two sides of the baffle 4 through the heavy hammer 2 to complete the assembly. After assembly, one person on site holds the side of the rod body 1 without the heavy hammer 2, and inserts the side of the rod body 1 with the heavy hammer 2 into the sealing casing for about 0.5m. Then another person on site holds the handle 3 and hits the casing with the heavy hammer 2, or uses the drop hammer principle to swing the hammer to ensure that the casing can be lowered into the hole. After use, remove the device. The baffle 4 can prevent the rod body 1 from falling into the casing when it is not held firmly.
[0021] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A casing auxiliary device for drilling along the layer, characterized in that: It comprises a rod body and a weight; the rod body can be inserted into a sleeve; the weight is a hollow structure, and the rod body can pass through the weight.
2. The casing auxiliary device for drilling in-layer according to claim 1, characterized in that: The in-layer drilling auxiliary casing device also includes a handle, which is welded to the outer side of the heavy hammer.
3. The casing auxiliary device for drilling in-layer according to claim 2 is characterized in that: The handle is made of iron.
4. The casing auxiliary device for drilling in-layer according to claim 1, characterized in that: The in-layer drilling auxiliary casing device also includes a baffle, and the rod body passes through the center of the baffle and is welded to the baffle.
5. The casing auxiliary device for drilling in-layer according to claim 4 is characterized in that: The baffle is a circular iron sheet.
6. The casing auxiliary device for drilling in-layer according to claim 1, characterized in that: The rod body is made of an iron pipe.
7. The casing auxiliary device for drilling in-layer according to claim 1, characterized in that: The heavy hammer is a cylindrical iron block.