CN220167900U - Combined hollow screw drilling tool assembly - Google Patents

Abstract

The utility model discloses a combined hollow screw drilling tool assembly, which relates to the technical field of drilling tools and mainly comprises a hollow screw drilling tool, a coring drilling tool and a coring bit, wherein the coring system can perform coring operation in a rope coring mode. In the drilling and coring process, the hollow screw drilling tool can provide high rotating speed for a well bottom drill bit and increase the coring footage speed. By adopting the hollow structure, the rope coring drilling tool can be installed in the inner space, and the winch can be used for salvaging after each time of core drilling, so that all the drilling tools are not used, and the coring time is saved. By adopting the combined modularized hollow screw structure, the screw drilling tool with different rotation speeds and torques can be installed, so that the rotation speed and torque of the combined hollow coring screw can be adjusted, and the requirements of different working conditions can be met. The structure cancels the hollow universal joint structure of the traditional hollow screw coring drilling tool, prevents the drilling tool from being damaged due to fatigue failure of the hollow universal joint in the operation process, and prolongs the service life of the combined hollow coring screw.

Description

Combined hollow screw drilling tool assembly

Technical Field

The utility model relates to the technical field of drilling tools, in particular to a combined hollow screw drilling tool assembly.

Background

The rope coring drilling is a geological exploration drilling construction method that the inner assembly is put into a drilling tool in a specially-made rope drill rod, and after the coring drilling is finished, the inner assembly is fished out of the ground surface by using a rope fisher to obtain a core.

The patent with the publication number of CN106223888A discloses a sealing liquid rope coring drilling tool, which comprises an inner pipe and an outer pipe, the upper end of the outer pipe is connected with a drill rod, the lower pipe orifice of the outer pipe is provided with a drill bit, the upper end of the inner pipe is connected with a salvaging device, an upper piston and a lower piston are slidably arranged in a lower pipe cavity of the inner pipe, a cavity for loading sealing liquid is arranged between the upper piston and the inner pipe, the lower pipe orifice of the inner pipe forms an inlet of a core, a gap for the sealing liquid to pass through is arranged between the lower piston and the inner pipe in the rising process of the lower piston, a clamp spring for cutting off the core is further arranged at the lower end of the inner pipe, the drilling of the drilling tool is realized in the rotating process of the outer pipe, the core drives the lower piston and the inner pipe to produce the gap for the sealing liquid to pass through, the sealing liquid flows out from the gap and adheres to the core, pollution is prevented, the leakage of core gas is reduced, the core is cut off by the clamp spring, and the inner pipe is pulled out from the inner pipe by the salvaging device.

With the development of drilling coring, various complicated conditions, such as deep sea drilling coring, will be encountered, because the seabed will encounter hard rock and the speed of advance can be increased by adopting high rotation speed, but the seawater has no supporting capability, so as to prevent the drill rod from twisting, and the drilling machine power head on the drilling ship cannot be used for providing high rotation speed, or the capability of the drilling machine power head is limited, and the high rotation speed cannot be provided, so that the use of the downhole power drilling tool is very important. The screw motor drilling tool can provide higher rotating speed, but the conventional screw motor is generally of a solid structure, a coring drilling tool and a drill rod are arranged at the lower part of the screw motor, all drilling tools need to be lifted out of the bottom of the well after taking out a core for one round, and when the well depth is larger, because the drilling tools are more, time is wasted when each drilling tool is started and tripped, and the cost is higher.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the combined hollow screw drilling tool assembly which can provide high rotating speed for a drill bit, increase the coring footage speed, does not use all drilling tools and saves the coring time.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a combined hollow screw drilling tool assembly, which comprises a hollow screw drilling tool, a coring drilling tool and a coring bit; the hollow screw drilling tool comprises an upper joint, an outer shell, an inner shunt joint, a central tube, a screw drilling tool, a torque transmission pinion, a torque transmission large gear, a torque transmission joint and a wire changing joint; one end of the outer shell is connected with the outer wall of one end of the upper joint, the inner shunt joint is arranged in one end of the outer shell, one end of the inner shunt joint is connected with the inner wall of one end of the upper joint, the other end of the inner shunt joint is connected with one ends of a plurality of screw drilling tools in the circumferential direction, and the other end of the screw drilling tools is connected with the torque transmission pinion; the middle part of the other end of the internal flow dividing connector is connected with one end of the central tube, the other end of the central tube is provided with the torsion transmission big gear, and the torsion transmission small gear is meshed with the torsion transmission big gear; the torque transmission large gear is connected with the torque transmission joint, and the torque transmission joint is connected with the coring bit; the core drilling tool passes through the upper joint and the internal shunt joint and then stretches into the central tube.

Optionally, a bearing is arranged between the other end of the outer shell and the torsion joint.

Optionally, a limit stop is arranged between the other end of the outer shell and the coring bit.

Optionally, a stabilizing support is provided between the screw drilling tool and the inner wall of the outer casing and between the screw drilling tool and the central tube.

Optionally, a wire-changing connector is arranged between the torque transmission connector and the coring bit.

Optionally, an annular sealing gasket is disposed on the inner wall of the central tube, and the annular sealing gasket is used for forming a seal between the central tube and the coring drilling tool.

Optionally, the inner wall of the middle part of one end of the internal shunt joint is of a horn mouth structure.

Optionally, a clamping groove is arranged on the inner wall of the internal shunt joint.

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

1. in the drilling and coring process, the hollow screw drilling tool can provide high rotating speed for a well bottom drill bit and increase the coring footage speed.

2. By adopting the hollow structure, the rope coring drilling tool can be installed in the inner space, and the winch can be used for salvaging after each time of core drilling, so that all the drilling tools are not used, and the coring time is saved.

3. By adopting the combined modularized hollow screw structure, the screw drilling tool with different rotation speeds and torques can be installed, so that the rotation speed and torque of the combined hollow coring screw can be adjusted, and the requirements of different working conditions can be met.

4. The structure cancels the hollow universal joint structure of the traditional hollow screw coring drilling tool, prevents the drilling tool from being damaged due to fatigue failure of the hollow universal joint in the operation process, and prolongs the service life of the combined hollow coring screw.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a modular hollow screw drilling assembly of the present utility model;

FIG. 2 is a schematic view of the structure of a hollow screw drilling tool in the modular hollow screw drilling tool assembly of the present utility model;

FIG. 3 is a schematic structural view of a cross section of a torque transmission gear in a modular hollow screw drilling assembly of the present utility model;

FIG. 4 is a schematic view of the structure of a center tube annular seal gasket in a modular hollow screw drilling assembly of the present utility model;

fig. 5 is a schematic view of a partial enlarged structure at a in the combined hollow screw drilling tool assembly of the present utility model.

Reference numerals illustrate: 1. a hollow screw drill; 2. a core drill; 3. coring bit

101. An upper joint; 102. an outer housing; 103. an internal shunt joint; 104. a central tube; 105. screw drilling tool; 106. a torque transmission pinion; 107. a torque transmission large gear; 108. a torque transmission joint; 109. a bearing; 110. a limit stop; 111. a wire-changing joint; 112. stabilizing the stent.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, the present embodiment provides a combined hollow screw drill assembly, which mainly includes a hollow screw drill 1, a coring tool 2 and a coring bit 3, and the coring system can perform coring operation by adopting a rope coring mode.

The structure of the hollow screw drilling tool is shown in fig. 2, the upper joint 101 is respectively connected with the outer shell 102 and the inner shunt joint 103 through threads, the inner shunt joint 103 is connected with the central tube 104 through threads, the upper end of the inner shunt joint 103 is of a horn mouth structure, the core drilling tool 2 can enter the central tube 104 through the horn mouth, meanwhile, the upper end of the inner shunt joint 103 is provided with a clamping groove, the core drilling tool 2 can be clamped in the clamping groove in a spring clamping manner, the core drilling tool 2 is prevented from moving, the small-size screw drilling tool 105 is a standard product in the market, the upper end of the small-size screw drilling tool 105 is connected with the lower end threads of the inner shunt joint 103, the lower end of the small-size screw drilling tool 105 is connected with a torque transmission pinion 106, the torque transmission pinion 106 is meshed with a torque transmission pinion 107, the pinion 106 can drive the large gear 107 to rotate to realize torque transmission, the torque transmission pinion 107 is connected with a torque transmission joint 108 through threads, the torque transmission joint 108 is connected with a thread change joint 111, the lower end of the change wire joint 11 is provided with a button, the core drilling tool 3 is connected with the core drilling tool 108, a bearing 109 is arranged between the torque transmission torque joint 108 and the outer shell 103, the single-movement of the single-side shell 103 can be realized, the hollow screw drilling tool is prevented from falling down by the lower end of the hollow screw drilling tool 110. A stabilizing bracket 112 is installed between the central tube 104 and the small-size screw drilling tool 105, and the stabilizing bracket fixes the position of the central tube 104 and the small-size screw drilling tool 105, so that circumferential vibration of the central tube 104 and the small-size screw drilling tool 105 is prevented.

The section view of the torque transmission gear of the hollow screw drilling tool is shown in fig. 3, the torque transmission pinion 106 is meshed with the torque transmission gear wheel 107, the lower end of the screw drilling tool 105 is connected with the torque transmission pinion 106, and when the screw drilling tool 105 rotates, the pinion 106 drives the torque transmission gear wheel 107 to rotate, so that power is provided for the coring bit.

The central tube 104 is internally provided with an annular sealing gasket, and as shown in fig. 4 and 5, when the coring bit 2 is lowered into place, a seal is formed between the annular gasket and the coring bit 2, and mud can only flow through the inside of the screw drill 105 to drive the screw drill 105 to rotate and drive the coring bit 3.

It should be noted that it will be apparent to those skilled in the art that the present utility model is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

The principles and embodiments of the present utility model have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present utility model and its core ideas; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims (8)

1. The combined hollow screw drilling tool assembly is characterized by comprising a hollow screw drilling tool, a coring drilling tool and a coring drill; the hollow screw drilling tool comprises an upper joint, an outer shell, an inner shunt joint, a central tube, a screw drilling tool, a torque transmission pinion, a torque transmission large gear, a torque transmission joint and a wire changing joint; one end of the outer shell is connected with the outer wall of one end of the upper joint, the inner shunt joint is arranged in one end of the outer shell, one end of the inner shunt joint is connected with the inner wall of one end of the upper joint, the other end of the inner shunt joint is connected with one ends of a plurality of screw drilling tools in the circumferential direction, and the other end of the screw drilling tools is connected with the torque transmission pinion; the middle part of the other end of the internal flow dividing connector is connected with one end of the central tube, the other end of the central tube is provided with the torsion transmission big gear, and the torsion transmission small gear is meshed with the torsion transmission big gear; the torque transmission large gear is connected with the torque transmission joint, and the torque transmission joint is connected with the coring bit; the core drilling tool passes through the upper joint and the internal shunt joint and then stretches into the central tube.

2. The combination hollow screw drilling assembly as recited in claim 1, wherein a bearing is provided between the other end of the outer housing and the torque transmission connector.

3. The combination hollow screw drilling assembly of claim 1, wherein a positive stop is provided between the other end of the outer housing and the coring bit.

4. The combination hollow screw drilling assembly of claim 1, wherein a stabilizing support is provided between the screw drilling tool and the inner wall of the outer housing and between the screw drilling tool and the center tube.

5. The combination hollow screw drilling assembly of claim 1, wherein a wire-change joint is provided between the torque-transmitting joint and the coring bit.

6. The combination hollow screw drilling assembly of claim 1, wherein an annular sealing gasket is disposed on the inner wall of the center tube for forming a seal between the center tube and the coring tool.

7. The combination hollow screw drilling assembly of claim 1, wherein the inner wall of the middle portion of the one end of the inner shunt joint is of a flare structure.

8. The modular hollow screw drilling assembly as recited in claim 1, wherein the inner wall of the inner shunt joint is provided with a slot.