Guiding drilling tool for horizontal directional drilling pipe laying construction
The detachable connection design between the drill rod and the probe chamber solves the problems of cumbersome drill bit or reamer replacement and difficulty in determining the jamming position in the existing technology, enabling rapid replacement and precise positioning, and improving construction efficiency and safety.
Patent Information
- Application Number
- CN202520466029.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In existing horizontal directional drilling pipe laying operations, the disassembly process for replacing drill bits or reamers is cumbersome, and in complex strata, it is difficult to accurately determine the location where the reamer is stuck, leading to difficulties in troubleshooting.
A guide drill bit is designed that allows for detachable connection between the drill rod and the probe chamber via a second connecting sleeve, enabling quick replacement of drill bits or reamers and determining the reamer jamming position by retaining the detection signal inside the probe chamber.
It enables rapid replacement of drill bits or reamers, improving construction efficiency, and accurately locates stuck positions through detection signals, simplifying troubleshooting and enhancing construction efficiency and safety.
Smart Images
Figure CN223781397U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drilling tools technology for drilling equipment, and specifically to a guide drill tool for horizontal directional drilling pipe laying construction. Background Technology
[0002] Horizontal directional drilling (HDD) pipe laying has been widely used in urban underground pipeline laying and oil and gas transportation due to its advantages such as high efficiency, environmental friendliness, and safety. In this construction method, a small pilot hole is first drilled using a guiding device. Then, the pilot drill bit is removed, and an upper reamer is used to ream the hole in the reverse direction, while the pipeline to be laid is pulled into the borehole simultaneously.
[0003] In complex geological formations, drill bits are often changed to suit different formations based on varying geological conditions. Existing directional drilling tools for horizontal directional drilling and pipe laying have a guide plate fixed to the lower end of the probe chamber, with the upper end of the probe chamber detachably connected to the drill rod via a connecting sleeve. Changing to a drill bit or reamer for different formations requires disassembling the connecting sleeve, probe chamber, and other components, a cumbersome and inefficient process. Furthermore, during reverse reaming, the complexity of the formation can cause debris such as gravel and metal parts to jam the reamer. Since the probe chamber is removed after reaming, the exact location of the jamming cannot be determined, leading to difficulties in clearing obstacles. Utility Model Content
[0004] To address the aforementioned shortcomings, the technical problem this utility model aims to solve is that, when performing horizontal directional drilling and pipe laying in complex strata, the process of changing drill bits or reamers suitable for different strata is cumbersome and inefficient; when performing reverse reaming after replacing the reamer, it is impossible to know the exact location where the reamer is stuck, making troubleshooting difficult.
[0005] Therefore, this application provides a guide drill for horizontal directional drilling pipe laying construction, including a drill rod, a probe chamber and a replaceable drill tool connected in sequence. The drill rod and the probe chamber are detachably connected. The replaceable drill tool includes a drill bit and a reamer suitable for different formations. The probe chamber and the replaceable drill tool are detachably connected by a second connecting sleeve, which enables interchangeability between the replaceable drill tools or with the reamer.
[0006] Based on the above technical solutions, drill bits or reamers can be quickly replaced according to different formations, with fast replacement speed and high efficiency. In addition, the detection chamber is retained when replacing the reamer. When reverse reaming occurs, if debris such as gravel or metal parts in the formation jam the reamer, the detection signal emitted by the probe in the probe chamber can be used to obtain the accurate location of the jamming reamer, providing accurate information for obstacle removal and thus improving construction efficiency.
[0007] In the above technical solution, preferably, the tail end of the replaceable drill bit is provided with a prism-shaped first connecting part, and the front end of the probe chamber is provided with a prism-shaped second connecting part. The second connecting part has the same shape as the first connecting part. The second connecting sleeve is cylindrical with open ends. The shaft hole of the second connecting sleeve is adapted to the first connecting part and the second connecting part. The second connecting sleeve is respectively fitted onto the first connecting part and the second connecting part and fixed by locking screws.
[0008] In the above technical solution, preferably, the tail end of the first connecting part is provided with an insert shaft, and the front end face of the second connecting part is provided with an insert hole, the insert hole is adapted to the insert shaft, and the insert shaft is inserted into the insert hole.
[0009] In the above technical solution, preferably, the length of the second connecting sleeve is the same as the sum of the lengths of the first connecting part and the second connecting part, and the length of the insert shaft is less than the depth of the insert hole.
[0010] In the above technical solution, preferably, the end face of the insert shaft is provided with a shaft hole.
[0011] In the above technical solution, preferably, the first connecting part and the second connecting part are in the shape of an octagonal prism.
[0012] As can be seen from the above technical solution, the guide drill bit for horizontal directional drilling pipe laying construction provided by this utility model solves the problems of cumbersome disassembly procedures when changing different drill bits and the inability to determine the exact location of the reamer jamming during reverse reaming after changing the reamer, resulting in troublesome troubleshooting. Compared with the prior art, this utility model has the following beneficial effects:
[0013] This design changes the traditional non-detachable drill rod and probe chamber design. The drill rod and probe chamber can be quickly detached and connected via a second connecting sleeve, allowing for rapid interchange of different drill bits or reamers. In complex geological formations, the second connecting sleeve allows for easy replacement of the drill bit at the front of the probe chamber with a drill bit suitable for the corresponding formation for pilot hole drilling and reverse reaming operations. This replacement is convenient, fast, and efficient. Furthermore, when changing reamers for reverse reaming operations, because the probe chamber is retained, if debris such as gravel or metal parts in the formation jams the reamer, the detection signal emitted by the probe inside the chamber can pinpoint the exact location of the jamming, providing precise information for obstacle removal and thus improving construction efficiency. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced and explained below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 A schematic diagram of the guide drill bit for horizontal directional drilling pipe laying construction provided by this utility model;
[0016] Figure 2 for Figure 1 The diagram shows a cross-sectional view of a guide drill used for horizontal directional drilling pipe laying.
[0017] Figure 3 for Figure 1 The diagram shows an exploded view of the guide drill string used in horizontal directional drilling pipe laying.
[0018] Figure 4 This is a schematic diagram of the replaceable drill bit in this utility model;
[0019] Figure 5 This is a schematic diagram of the second connecting sleeve in this utility model;
[0020] Figure 6 This is a schematic diagram of the probe chamber in this utility model.
[0021] Figures 1-6 The correspondence between the parts is as follows:
[0022] Drill pipe 10, probe chamber 20, replaceable drill tool 30, first connecting sleeve 40, second connecting sleeve 50, locking screw 60;
[0023] Second connecting part 21, insertion hole 22;
[0024] First connecting part 31, insert shaft 32, shaft hole 33. Detailed Implementation
[0025] In existing horizontal directional drilling pipe-laying operations, the guide drill string has a probe chamber that is detachably connected to the drill rod via a connecting sleeve at the upper end, while the guide plate is fixed to the front end of the probe chamber and cannot be removed. During operations in complex geological formations, if the drill bit is damaged or needs to be replaced with a different type of drill bit suitable for different formations, or when replacing the reamer for reverse reaming, the probe chamber and drill bit must be removed for replacement, making the disassembly process complex. Furthermore, debris such as gravel and metal parts in the formation may jam the reamer during reverse reaming. Since the probe chamber has been removed when replacing the reamer, the exact location of the jamming cannot be determined, making obstacle removal inconvenient.
[0026] In this application, the drill rod and probe chamber are detachably connected via a second connecting sleeve, allowing for the interchangeability of different drill bits and reamers. During directional drilling in complex formations, the drill bit at the front end of the probe chamber can be easily and quickly replaced with a drill bit suitable for the current formation using the second connecting sleeve. During reverse reaming operations, because the probe chamber is retained, when debris such as gravel or metal parts in the formation jam the reamer, the detection signal emitted by the probe inside the chamber can accurately pinpoint the location of the jamming, providing precise information for obstacle removal and thus improving construction efficiency.
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] To provide a clearer explanation and description of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.
[0029] It should be noted that the directional terms such as "inner" and "outer", "front" and "back" and "left" and "right" in this article are based on the product's usage status. Obviously, the use of these directional terms does not limit the scope of protection of this solution.
[0030] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a guide drill for horizontal directional drilling pipe laying construction, comprising a drill rod 10, a probe chamber 20 and a replaceable drill tool 30 connected in sequence, wherein the drill rod 10 and the probe chamber 20 are detachably connected by a first connecting sleeve 40, and the probe chamber 20 and the replaceable drill tool 30 are detachably connected by a second connecting sleeve 50.
[0031] The replaceable drilling tool 30 includes a drill bit and a reamer. Thus, when this solution is applied to horizontal directional drilling pipe-laying operations, the drill bit and reamer can be interchanged via the second connecting sleeve 50. During construction in complex geological formations, a pilot drill bit is first installed to drill a small pilot hole. If the drill bit is damaged or needs to be replaced, the second connecting sleeve 50 is loosened, the drill bit at the front end of the probe chamber 20 is removed, and a new drill bit suitable for the current formation is replaced, making replacement quick and convenient. After the pilot drilling operation is completed, the reamer is installed at the front end of the probe chamber 20, replacing the original pilot drill bit for reverse reaming. Because the probe chamber 20 is retained, if debris such as gravel or metal parts in the formation jams the reamer, the exact location of the jamming can be determined by the detection signal emitted by the probe within the probe chamber 20, providing precise information for obstacle removal and improving construction efficiency and safety.
[0032] like Figure 4 , Figure 5 , Figure 6 As shown, the replaceable drill bit 30 has a prism-shaped first connecting part 31 at its tail end, and the tail end of the first connecting part 31 has an insert shaft 32.
[0033] The front end of the probe chamber 20 is provided with a prism-shaped second connecting part 21. The second connecting part 21 has the same shape as the first connecting part 31. The front end face of the second connecting part 21 is provided with an insertion hole 22, which is adapted to the insertion shaft 32.
[0034] The second connecting sleeve 50 is cylindrical with open ends. The shaft hole of the second connecting sleeve 50 is adapted to the first connecting part 31 and the second connecting part 21.
[0035] The insert shaft 32 is inserted into the insert hole 22. The second connecting sleeve 50 is respectively fitted onto the first connecting part 31 and the second connecting part 21, and secured by radially arranged locking screws 60. Figure 2 , Figure 3 As shown. Thus, the replaceable drill string 30 and the probe chamber 20 can be detachably connected via the second connecting sleeve 50.
[0036] In this embodiment, the first connecting part 31 and the second connecting part 21 are octagonal prisms.
[0037] In this embodiment, the length of the second connecting sleeve 50 is the same as the sum of the lengths of the first connecting part 31 and the second connecting part 21, and the length of the insert shaft 32 is less than the depth of the insert hole 22. Thus, after the replacement drill bit 30 and the probe chamber 20 are assembled, the opposite end faces of the first connecting part 31 and the second connecting part 21 fit together, and at the same time, both ends of the second connecting sleeve 50 fit together with the opposite end faces of the replaceable drill bit 30 and the probe chamber 20, which can prevent soil from entering the drill bit during operation and causing wear.
[0038] In another embodiment, the end face of the insert shaft 32 is provided with a shaft hole 33. Even if soil enters the drill bit, it will enter the shaft hole 33, thus preventing soil from getting stuck between the mating surfaces of the first connecting part 31, the second connecting part 21 and the second connecting sleeve 50, or between the mating surfaces of the insert shaft 32 and the insert hole 22, causing wear.
[0039] Based on the above description of specific embodiments, the directional drilling tool for horizontal directional drilling pipe laying provided by this utility model has the following advantages compared with the prior art:
[0040] First, the drill pipe and probe chamber are detachably connected via a first connecting sleeve, and different drill bits can be quickly interchanged via a second connecting sleeve. In complex geological formations, the drill bit at the front of the probe chamber can be quickly replaced with a drill bit adapted to the current formation for pilot hole construction using the second connecting sleeve. This quick and convenient disassembly improves construction efficiency.
[0041] Secondly, the guide drill bit and the reamer can be interchanged via the second connecting sleeve. During construction in complex geological formations, the guide drill bit at the front end of the probe chamber can be replaced with the reamer for reverse reaming operations. Since the probe chamber is retained, when debris such as gravel or metal parts in the formation jam the reamer, the detection signal emitted by the probe inside the chamber can be used to obtain the accurate location of the jamming, providing precise information for obstacle removal and thus improving construction efficiency and safety.
[0042] Third, the end face of the insert shaft is provided with a shaft hole, which can accommodate the slag that enters the drill bit, and prevent the slag from getting stuck between the mating surfaces of the first connecting part, the second connecting part and the second connecting sleeve, or between the mating surfaces of the insert shaft and the insert hole, causing wear.
[0043] Finally, it should be noted that the terms "comprising," "including," or any other variations thereof as used herein are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0044] This utility model is not limited to the above-described preferred embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.
Claims
1. A guiding drill string for horizontal directional drilling pipe laying construction, comprising a drill rod, a probe chamber, and a replaceable drill string connected in sequence, wherein the drill rod and the probe chamber are detachably connected, characterized in that, The replaceable drill bit includes drill bits and reamers suitable for different formations. The probe chamber is detachably connected to the replaceable drill bit via a second connecting sleeve, which enables interchangeability between the replaceable drill bits or with the reamer.
2. The guiding drill string for horizontal directional drilling and pipe laying construction according to claim 1, characterized in that, The replaceable drill bit has a prism-shaped first connecting part at its tail end and a prism-shaped second connecting part at the front end of the probe chamber. The second connecting part has the same shape as the first connecting part. The second connecting sleeve is cylindrical with open ends. The shaft hole of the second connecting sleeve is adapted to the first connecting part and the second connecting part. The second connecting sleeve is respectively fitted onto the first connecting part and the second connecting part and fixed by locking screws.
3. The guiding drill string for horizontal directional drilling and pipe laying construction according to claim 2, characterized in that, The first connecting part has a insertion shaft at its tail end and an insertion hole on its front end face. The insertion hole is adapted to the insertion shaft and the insertion shaft is inserted into the insertion hole.
4. The guiding drill string for horizontal directional drilling pipe laying construction according to claim 3, characterized in that, The length of the second connecting sleeve is the same as the sum of the lengths of the first connecting part and the second connecting part, and the length of the insert shaft is less than the depth of the insert hole.
5. The guiding drill string for horizontal directional drilling pipe laying construction according to claim 3, characterized in that, The end face of the insert shaft is provided with a shaft hole.
6. The guiding drill string for horizontal directional drilling and pipe laying construction according to claim 2, characterized in that, The first connecting part and the second connecting part are octagonal prisms.