CN2679340Y

CN2679340Y - Single action core bit having internal advance double tubes

Info

Publication number: CN2679340Y
Application number: CN 03266883
Authority: CN
Inventors: 刘宝林; 薛军
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-09
Filing date: 2003-07-09
Publication date: 2005-02-16
Anticipated expiration: 2013-07-09

Abstract

The utility model discloses a single action core bit having internal advance double tubes for acquiring the core sample of the raw condition mud (sand) in the loose deposited stratum of Quaternary period, mainly comprising the parts of an inside groove joint, an inside and outside pipes, a drill bit of the inside and outside pipes, a diversion adapter and a single action device etc. The devices for protecting the core sample of the plastic film and the elastic pawl spring etc. are arranged in the tool, the diversion adapter and the connecting pieces in the pipes can move oppositely to the outer pipe, the advance quantity of the drill bit of the inside pipe and the pre-pressure of the pressure spring can be adjusted, and the advance quantity and the spring pressure can varies correspondingly with different resistances of the stratum. The utility model can effectively drill the raw condition sample of the loose porous sedimentary deposit etc, and is applied to the branches of earth science research, engineering geological prospecting and building material mine exploitation etc.

Description

Interior leading two-tube single action core bit

(1) technical field:

The purpose of this utility model provides a kind of interior leading two-tube single action core bit, this drilling tool can drill through original state mud (sand) rock core in the Quaternary Period such as clay, sand, lake bottom silts in the sedimentary formation, be applicable to fields such as earth science research, engineering geologic investigation, building materials exploitation of mineral resources.

(2) background technology:

In research fields such as earth sciences, often need drill through the original state quaternary sediment and remove to study geologic climate, extinct plants and animal and ancient geographical environment, thereby modern humans's living environment is made correct criterion and countermeasure, yet because quaternary sediment mostly is loose cellular of silt or viscosity shape material, the taking rate deficiency often appears in coring tool conventional in drilling process, or rock core is subjected to disturbance too big and heavy damage of original state structure and rock core are subjected to problems such as flushing liquor pollution; In addition, in geotechnical investigation and building materials exploitation of mineral resources, often need do Mechanics Performance Testing or seepage of water test, so that more correctly carry out engineering design by obtaining the original state ground heart.

Technical problem to be solved in the utility model is must do the best to reduce the rock core enter in the drilling tool and be subjected to the pollution of flushing liquor and reduce the disturbance of drilling tool to rock core as far as possible, should manage to improve core recovery percentage in addition and be convenient to coring and the rock core protection on the face of land.

(3) summary of the invention:

Leading two-tube single action drilling tool addresses the above problem like this with respect to present conventional core drill in the utility model: it is two-tube that drilling tool is designed to inside and outside single action, and interior pipe has big stroke with respect to outer tube, can insert the 3rd layer of pipe (as pvc pipe) or plastic sheeting in the interior pipe as required further to prevent rock core disturbance protection rock core, drilling tool has also designed inside and outside drill bit, interior drill bit can stretch out in advance with respect to outer drill bit, and leading amount can be regulated in advance, is subjected to the erosion of flushing liquor to prevent rock core; In the single action on interior pipe top is provided with compression spring is housed, its pre compressed magnitude can apply different elastic pressures with the different rock-layers resistance that interior drill bit runs into by regulating pad preset when sampling; The elasticity pawl spring of can packing into as required in the pipe bit outside, when shrinking with respect to outer tube, interior pipe carries to certain altitude, the elasticity pawl spring shrinks automatically, can utilize this pawl spring to grasp rock core for the grittiness broken ground that is difficult to sampling, has levied the success rate of coring thereby protect.

(4) description of drawings:

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is pipe bit and a plastic sheeting assembling schematic diagram in the utility model.

Fig. 3 is the utility model elasticity pawl spring schematic diagram.

(5) specific embodiment:

Shown in Fig. 1 structure chart, interior leading two-tube single action drilling tool of the present utility model can be divided into outer tube part and interior tube portion two major parts, and outer tube part mainly is made up of outer tube 17, interior trough connection 6, headkerchief 2, elasticity pawl spring 28 and outer pipe bit 29; Interior tube portion mainly is made up of interior pipe 25, special tool joint 3, return connector 5, single action adapter 7, single action main shaft 16, interior pipe headkerchief 19, interior pipe bit 27.Return connector 5 is taken over 7 with screw thread and single action and is connected with special tool joint 3, and single action adapter 7 is joined with screw thread with capping 15 again; Interior trough connection 6 joins with screw thread and outer tube 17 and headkerchief 2, and outer tube 17 is connected with outer drill bit 29 with screw thread again.

In single action adapter 7, two disc radial bearings 8 are housed, two dish thrust bearings 10,

pad

9,13,30, and split in single action is taken over left, right two positions, in the centre position that single action is taken over compression spring 11 is housed, regulate pad 12, single action main shaft 16, right-hand member in single action adapter 7 is connected to capping 15 with screw thread, rubber seal 14 is housed in the capping, by the precompression of compression spring 11 that increased or reduced the thickness adjusted of regulating pad 12, can reduce spacer thickness on soft stratum, reduce the precompression of spring, should increase spacer thickness on rigid stratum to increase pre-pressure of the spring.In when sampling, the difference of the formation resistance that runs into interior drill bit 27, compression spring 11 corresponding being compressed, thus export different elastic pressures.The right-hand member of single action main shaft 16 joins with screw thread and interior pipe headkerchief 19, and interior pipe headkerchief 19 is connected with interior pipe 25 with screw thread again, and interior pipe 25 is connected with interior drill bit 27 with screw thread.

Pipe headkerchief 19 in the right-hand member of single action main shaft 16 is equipped with; left and right two sides at interior pipe headkerchief 19 are equipped with adjusting pad 18, locknut 22,23; by the position of pipe headkerchief 19 in can regulating the adjusting of regulating pad 18 at single action main shaft 16; thereby pipe bit 27 is with respect to the leading amount of outer drill bit 29 in can regulating; when coring; because the formation resistance difference that interior pipe bit 27 runs into; this leading amount meeting respective flexible is dwindled or is increased; measure in advance and can increase at broken ground, thereby protected the rock core that enters interior drill bit not to be subjected to the flushing liquor erosion better.

Between the right-hand member of single action main shaft 16 and locknut 23, little spring 21 and steel ball 24 are housed, in drilling process, play a part in the control pipe return water and carry seal when boring in pipe.

On the external surface of return connector 5 by two parallel flat keys 4 are housed, in being inserted in two parallel long keyway of inner surface of trough connection 6, the return connector upper end is connected to special tool joint 3, when propelling is turned right in this tool joint, return connector together with flat key with respect to outer tube part displacement to the right, thereby tube portion is toward moving right in whole, when special tool joint 3 is rotated, interior trough connection 6 also rotates by the moment of torsion transmission of flat key 4 simultaneously, thereby whole outer tube and outer pipe bit all rotate, the single action setting that pipe 25 and interior pipe bit 27 are taken over 7 inside owing to single action in this moment is in not rotary state, this design feature can make drilling tool when implementing singly to be pressed into sampling or the rotation of two-tube single action and core, the less disturbance of rock core, and because the interior tube portion up segment distance of outer tube part relatively, thereby can realize that the contraction of elasticity pawl spring 28 grabs the sample function.

Fig. 2 is seen in the installation of plastic sheeting 26; step outside outside interior pipe bit 27 left ends, being processed among Fig. 2; form an annular space space with interior pipe 25 inner surfaces; plastic sheeting 26 (or the 3rd layer of pipe) is in the annulus that is pre-installed between interior pipe 25 and the interior pipe bit 27; in being equipped with, establishes at its left end exposure end the nylon ring 31 of through hole; nylon ring is headed on uply when loam core enters, and plastic sheeting is constantly deviate to encase and protected rock core.

Leave annulus between pipe bit 29 and the interior pipe bit 27 outside, elasticity pawl spring 28 can be installed as required, this elasticity pawl spring as shown in Figure 3, it is made up of quoit 32 and pawl spring 33, pawl spring is contraction-like when free state.Carry when boring, when mentioning certain position on interior tube portion shrinks, pawl spring can interiorly be received, and encases rock core from interior drill bit bottom, prevents that rock core from coming off.

Outer pipe bit 29 of the present utility model is generally carbide drill.Interior pipe bit 27 right-hand members be processed as male cone (strobilus masculinus), formation can be cut the cutting blade of mud layer, this cutting blade tread 0.5-3 millimeter.

Claims

1, a kind of interior leading two-tube single action core bit, it mainly is made up of parts such as interior trough connection, return connector, flat key, single action adapter, capping, single action main shaft, outer tube, interior pipe, interior pipe headkerchief, interior pipe bit, outer pipe bit, plastic sheeting, elasticity pawl springs.It is characterized in that: the return connector external surface is equipped with two parallel flat keys, and insert in two parallel elongated slots of interior trough connection inner surface, return connector right-hand member and single action are taken over, and the single action adapter is with capping and is threaded, and the left end of return connector joins with screw thread and special tool joint; Single action parts such as single action main shaft are housed in single action is taken over, and single action main shaft right-hand member is not fixed interior pipe headkerchief with the adjusting pad with lock, and interior pipe headkerchief links to each other with interior pipe and interior pipe bit with screw thread; Interior trough connection right-hand member joins with screw thread and outer tube, and outer tube links to each other with outer pipe bit with screw thread; Leave the annulus of can pack into plastic sheeting or the 3rd layer of pipe between interior pipe and the interior pipe bit, leave the annulus of the elasticity pawl spring of packing between outer pipe bit and the interior pipe bit, interior pipe bit right-hand member is the cutting blade shape.

2, interior pipe headkerchief is not fixed with lock according to the single action main shaft right-hand member of claims 1 described core bit, be it is characterized in that: the position of pipe headkerchief on the single action main shaft in can regulating by the thickness of regulating pad with the adjusting pad.

3, single action part such as single action main shaft is housed in taking over according to the single action of claims 1 described core bit, it is characterized in that: the single action part that single action is taken over is except that the single action main shaft, comprise two disc radial bearings, two dish thrust bearings and regulate pad, and split left and right two positions in single action is taken over, compression spring, single action main shaft are housed in the centre position that single action is taken over and regulate pad.

4, the interior pipe bit right-hand member according to claims 1 described core bit is the cutting blade shape, it is characterized in that: the cutting blade shape of the right-hand member of interior pipe bit forms by being processed as male cone (strobilus masculinus), and the tread of this cutting blade is at the 0.5-3 millimeter.

5, according to the annulus that leaves to pack into plastic sheeting or the 3rd layer of pipe between the interior pipe of claims 1 described core bit and the interior pipe bit, it is characterized in that: this annulus is that the left end external surface by interior pipe bit is processed with outer step and forms, after the assembling of it and interior pipe, can form the annular space space with interior pipe internal surface.

According to the elasticity pawl spring of claims 1 described core bit, it is characterized in that 6, this elasticity pawl spring is made up of quoit and pawl spring, pawl spring is contraction-like when free state.