CN220667483U

CN220667483U - Drilling rod centralizer for well drilling

Info

Publication number: CN220667483U
Application number: CN202322394746.2U
Authority: CN
Inventors: 秦立超
Original assignee: Mengyin Chaoyue Drilling Tools Co ltd
Current assignee: Mengyin Chaoyue Drilling Tools Co ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-03-26
Anticipated expiration: 2033-09-05

Abstract

The utility model discloses a drill rod centralizer for drilling, and belongs to the technical field of drilling equipment. Including the outer sleeve with locate the dabber at outer sleeve center, the dabber both ends are connected with first connector and second connector respectively, are equipped with first external screw thread and first internal screw thread respectively on first connector and the second connector, outer sleeve one end is connected with the end dish, is equipped with the joint groove on the end dish, is equipped with joint portion on the first connector, and joint portion is pegged graft in the joint groove to its size matches with the joint groove, and outside the outer sleeve was located to first external screw thread, inside the outer sleeve was located to first internal screw thread. According to the utility model, the clamping part and the clamping groove are quickly detached and installed, so that the outer sleeves with different sizes can be quickly replaced, the outer sleeves can be used for drilling holes with different diameters, the first connector and the second connector can be detachably connected, the connection with drill rods and drill bits with different specifications is realized, the universality is better, the whole replacement is not needed when the parts are damaged, and the use cost is reduced.

Description

Drilling rod centralizer for well drilling

Technical Field

The utility model belongs to drilling equipment, and particularly relates to a drilling rod centralizer for drilling.

Background

The engineering driller is used as a mechanical device for drilling, and the power head drives the drill rod to rotate and pushes the power head to move downwards so as to generate drilling acting force, so that holes with required sizes are drilled. In the construction process, along with the extension of the length of the drill rod, under the influence of the self weight of the drill rod, the change of stratum hardness, the weight of the drill, the drilling speed and other factors, the drill bit is easy to deflect and shake, so that the actual axis of the drill hole deviates from the designed axis, the difference between the drill bit and the designed axis is quite large, and great economic loss is brought, which is a potential safety hazard. In the prior art, aiming at the deflection phenomenon, a method of sleeving a centralizer between drill rods is adopted to solve the deflection phenomenon. The existing drill rod centralizer mainly comprises an outer sleeve and a mandrel arranged in the center of the outer sleeve, wherein the mandrel is fixed inside the outer sleeve through a spline or welded, two ends of the mandrel are respectively provided with a threaded connector integrally formed with the mandrel, the mandrel is connected with a drill rod of a drilling machine through one end, the other end of the mandrel is connected with a drill bit, and the drilling machine drives the mandrel and the outer sleeve to rotate simultaneously. The centralizer has the following defects: firstly, the disassembly and the assembly between the mandrel and the outer sleeve are troublesome, the whole structure is required to be destroyed during the disassembly, the welding and the fixation are required during the assembly, and the outer sleeve with different sizes is inconvenient to replace; secondly, connector and dabber integrated into one piece lead to can not match the installation with rig and the drill bit of different specifications, need whole change when partial damage, use cost is high.

Disclosure of Invention

The utility model aims to provide a drill rod centralizer for drilling so as to overcome the defects that the drill rod centralizer in the prior art is troublesome to detach and cannot be installed in a matching way with drilling machines and drill bits of different specifications.

The utility model is realized by adopting the following technical scheme: the utility model provides a drilling rod centralizer for well drilling, includes the outer sleeve and locates the dabber at outer sleeve center, dabber both ends are connected with first connector and second connector respectively, be equipped with first external screw thread and first internal screw thread on first connector and the second connector respectively, outer sleeve one end is connected with the end dish, be equipped with the joint groove on the end dish, be equipped with joint portion on the first connector, joint portion is pegged graft in the joint inslot to its size and joint groove match, outside the outer sleeve is located to first external screw thread, inside the outer sleeve is located to first internal screw thread.

Preferably, the first external thread and the first internal thread are tapered threads.

Preferably, the clamping part and the clamping groove are square.

Preferably, the outer surface of the outer sleeve is fixedly provided with a plurality of wear-resisting strips.

Preferably, a second internal thread is further arranged at one end, far away from the first external thread, of the first connector, a second external thread is arranged at one end of the mandrel, and the second external thread is connected with the second internal thread.

Preferably, the second external thread and the second internal thread are tapered threads.

Preferably, a third external thread is arranged at one end, far away from the first internal thread, of the second connector, a third internal thread is arranged at one end of the mandrel, and the third external thread is connected with the third internal thread.

Preferably, the third external thread and the third internal thread are tapered threads.

Preferably, a clamping section is arranged on the mandrel.

Compared with the prior art, the utility model has the beneficial effects that:

(1) One end of the outer sleeve is connected with the end disc, the end disc is provided with the square clamping groove, the first connector is provided with the clamping part matched with the clamping groove, the clamping part and the clamping groove are convenient to detach and install, the outer sleeve with different sizes can be quickly replaced, and the outer sleeve can be used for drilling holes with different diameters;

(2) The mandrel is detachably connected with the first connector and the second connector through threads, and connectors with different specifications can be replaced, so that connection with drill rods and drill bits with different specifications is realized, the universality is better, the whole replacement is not needed when the parts are damaged, and the use cost is reduced.

Drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a cross-sectional view taken along A-A of fig. 1.

Fig. 3 is a schematic perspective view of the mandrel, the first connector and the second connector according to the present utility model.

Fig. 4 is a schematic perspective view of the outer sleeve and end disk of the present utility model.

In the figure: 1. an outer sleeve; 11. wear strips; 2. an end plate; 21. a clamping groove; 3. a first connector; 31. a first external thread; 32. a clamping part; 33. a second internal thread; 4. a mandrel; 41. a second external thread; 42. a third internal thread; 43. clamping a tangential plane; 5. a second connector; 51. a first internal thread; 52. and a third external thread.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, a drill rod centralizer for well drilling comprises an outer sleeve 1 and a mandrel 4 arranged in the center of the outer sleeve 1, wherein two ends of the mandrel 4 are respectively connected with a first connector 3 and a second connector 5, the first connector 3 and the second connector 5 are respectively provided with a first external thread 31 and a first internal thread 51, one end of the outer sleeve 1 is connected with an end disc 2, the end disc 2 is welded and fixed with a port of the outer sleeve 1, the end disc 2 is provided with a clamping groove 21, the first connector 3 is provided with a clamping part 32, the clamping part 32 is inserted into the clamping groove 21, the size of the clamping part is matched with that of the clamping groove 21, the clamping part 32 and the clamping groove 21 are preferably square, so that the clamping part 32 axially rotates in the clamping groove 21 to limit, the first external thread 31 and the first internal thread 51 are preferably conical threads, the conical threads have taper angles, are more twisted and tighter, and the connecting part has a better sealing effect; the first external thread 31 is arranged outside the outer sleeve 1, and the first internal thread 51 is arranged inside the outer sleeve 1, so that the connection part of the first internal thread 51 and the drill rod is protected.

Referring to fig. 1 and 4, a plurality of wear-resistant strips 11 are fixedly arranged on the outer surface of the outer sleeve 1, and the wear-resistant strips 11 can reduce abrasion generated between the outer sleeve 1 and the inner wall of a drill hole when the outer sleeve 1 rotates.

Referring to fig. 3 and 4, in order to facilitate the disassembly of the first connector 3, the end of the first connector 3 far away from the first external thread 31 is further provided with a second internal thread 33, one end of the mandrel 4 is provided with a second external thread 41, the second external thread 41 is connected with the second internal thread 33, and the second external thread 41 and the second internal thread 33 are preferably conical threads.

Referring to fig. 3 and 4, in order to facilitate the disassembly of the second connector 5, a third external thread 52 is provided at an end of the second connector 5 away from the first internal thread 51, a third internal thread 42 is provided at an end of the mandrel 4, the third external thread 52 is connected with the third internal thread 42, and the third external thread 52 and the third internal thread 42 are preferably tapered threads.

The mandrel 4 is provided with a clamping tangent plane 43, the clamping tangent plane 43 is used for facilitating tool clamping, and the first connector 3 and the second connector 5 are convenient to detach.

The working process of the utility model comprises the following steps: when the tool is used, the mandrel 4 is connected with the second internal thread 33 of the first connector 3 and the third external thread 52 of the second connector 5 respectively through the second external thread 41 and the third internal thread 42 at the two ends in a matched screwing way, the screwing direction of the threads is consistent with the rotation direction of the drill rod, so that the drill rod in the hole is screwed more tightly with the centralizer; the clamping part 32 on the first connector 3 is inserted into the clamping groove 21 on the end disc 2 for fixation, then one end of the mandrel 4 is connected with the drill bit through the first connector 3, and the other end is connected with the drill rod of the drilling machine through the second connector 5, and the threaded connection end of the drill bit is screwed and abutted against the outer end face of the end disc 2, so that the first connector 3 is fixed on the end disc 2. When the drill rod in the hole rotates, the mandrel 4 and the outer sleeve 1 are driven to rotate simultaneously for drilling operation. The clamping part 32 and the clamping groove 21 are convenient to detach and mount, so that the outer sleeve 1 with different sizes can be quickly replaced, and the device can be used for drilling holes with different diameters; the first connector 3 and the second connector 5 are detachably connected with the mandrel 4 through the first external threads 31 and the first internal threads 51, and connectors with different specifications can be replaced when needed, so that connection with drill rods and drill bits with different specifications is realized, the universality is better, the whole replacement is not needed when the parts are damaged, and the use cost is reduced.

Claims

1. The utility model provides a drilling rod centralizer for well drilling, includes outer sleeve (1) and locates dabber (4) at outer sleeve (1) center, dabber (4) both ends are connected with first connector (3) and second connector (5) respectively, be equipped with first external screw thread (31) and first internal screw thread (51) on first connector (3) and second connector (5) respectively, its characterized in that: the novel outer sleeve is characterized in that one end of the outer sleeve (1) is connected with an end disc (2), a clamping groove (21) is formed in the end disc (2), a clamping portion (32) is arranged on the first connecting head (3), the clamping portion (32) is inserted into the clamping groove (21) and is matched with the clamping groove (21) in size, the first external thread (31) is arranged outside the outer sleeve (1), and the first internal thread (51) is arranged inside the outer sleeve (1).

2. The drill pipe centralizer for well drilling of claim 1, wherein: the first external thread (31) and the first internal thread (51) are tapered threads.

3. The drill pipe centralizer for well drilling of claim 1, wherein: the clamping part (32) and the clamping groove (21) are square.

4. The drill pipe centralizer for well drilling of claim 1, wherein: the outer surface of the outer sleeve (1) is fixedly provided with a plurality of wear-resisting strips (11).

5. The drill pipe centralizer for well drilling of claim 1, wherein: the first connector (3) is further provided with a second internal thread (33) at one end far away from the first external thread (31), the mandrel (4) is provided with a second external thread (41) at one end, and the second external thread (41) is connected with the second internal thread (33).

6. The drill pipe centralizer for well drilling of claim 5, wherein: the second external thread (41) and the second internal thread (33) are conical threads.

7. The drill pipe centralizer for well drilling of claim 1, wherein: one end of the second connector (5) far away from the first internal thread (51) is provided with a third external thread (52), one end of the mandrel (4) is provided with a third internal thread (42), and the third external thread (52) is connected with the third internal thread (42).

8. The drill pipe centralizer for well drilling of claim 7, wherein: the third external thread (52) and the third internal thread (42) are conical threads.

9. The drill pipe centralizer for well drilling according to any one of claims 1-8, wherein: the mandrel (4) is provided with a clamping section (43).