CN2231306Y - Core catcher - Google Patents

Abstract

The utility model provides a core catcher of a coring tool, mainly composed of a connecting sleeve, a yoke holder and a yoke. The core catcher is characterized in that the connection between the connecting sleeve and the yoke holder adopts the manner of buckle fastening and the screwed fixation of an internal tooth and an external tooth. Thereby, the utility model has the advantages of enough connecting strength and convenient assembling and disassembling, and the damage of a core can not be caused.

Description

Core grabber

The utility model relates to the core grabber in a kind of coring tool, and it comprises following several architectural feature: coupling sleeve, clip seat and clip.

In prior art, core grabber generally is made up of coupling sleeve, clip seat and clip.Adopt is threaded more between coupling sleeve and the clip seat, and mounting or dismounting are effort relatively.Especially coring finishes, and rock core be taken out in core barrel, just must lay down the clip seat.At this moment, drilling tool is in suspension status, and not only the pretightning force between the screw thread is big, and drilling tool rocks back and forth, operates very difficult.Simultaneously, rock core will rotate with the clip seat, twists off easily, even local the pulverizing also can be taken place, thereby destroyed the integrality of rock core.Afterwards, we used holding screw instead in succession between coupling sleeve and clip seat, and expectation can overcome above-mentioned shortcoming.Yet because the holding screw insufficient strength, fracture is obstructed the application of this core grabber easily.

In order to overcome weak point of the prior art, we improve existing core grabber.This core grabber not only has enough bonding strengths, and installs and removes lightly, also can not cause damage to rock core.

The purpose of this utility model can reach by following measure: this core grabber comprises a coupling sleeve, and the clip seat is connected the lower end of coupling sleeve, and clip is positioned on the internal conical surface of clip seat.Its special character is on the external cylindrical surface of coupling sleeve lower end several straight-tooth are arranged, the straight-tooth that also has quantity to equate on the inner cylinder face of clip seat upper end, and fasten mutually.With a holding screw coupling sleeve and clip seat are fixed again.

The utility model has following advantage compared to existing technology: because the connection between coupling sleeve and the clip seat is to adopt the mode that internal tooth and external tooth fasten mutually and holding screw is fixing, like this, not only has enough bonding strengths, and install and remove light.Especially drilling tool is under the suspension status, only need shed holding screw, with 60 ° of clip seat rotations, and just removal of core intactly.

The drawing of accompanying drawing is described as follows:

Fig. 1 is vertical half sectional view of the present utility model.

Fig. 2 is the A-A sectional drawing among Fig. 1.

Fig. 3 is among Fig. 1 and B-B sectional drawing.

The utility model will be further described in conjunction with the accompanying drawings: a coupling sleeve (1) is arranged at the top of core grabber shown in the figure, uniform three straight-tooth (4) on the external cylindrical surface of its lower end.A clip seat (5) is arranged at the bottom of core grabber, also uniform three straight-tooth (2) on the inner cylinder face of its upper end.The cross section of these teeth is the part circular ring, and equal and opposite in direction.If coupling sleeve (1) and clip seat (5) will be coupled together, the straight-tooth (2) of clip seat (5) upper end can be passed the teeth groove of coupling sleeve (1) lower end, rotate 60 ° then, the straight-tooth (4) on the coupling sleeve (1) is fastened with the straight-tooth (2) in the clip seat (5) is mutual.At last, holding screw (3) is screwed in the screw of clip seat (5) upper end, make its cylindrical end withstand aperture on the coupling sleeve (1), thereby reach the purpose of be fixedly connected cover (1) and clip seat (5).On the contrary,, only need shed holding screw (3), clip seat (5) is rotated 60 °, just clip seat (5) can be extracted if will take coupling sleeve (1) and clip seat (5) apart.Clip (6) is positioned on the internal conical surface of clip seat (5), can move up and down, and the conical sleeve of its upper end plays guiding, centralizing function in cannelure.Carry drilling tool on core-drilling finishes, and only needs slightly, clip (6) just can block the rock core root, and puts off from here.

Claims (1)

1. the core grabber in the coring tool, it comprises a coupling sleeve (1), clip seat (5) is connected the lower end of coupling sleeve (1), clip (6) is positioned on the internal conical surface of clip seat (5), it is characterized in that on the external cylindrical surface of coupling sleeve (1) lower end several straight-tooth (4) being arranged, the straight-tooth (2) that also has quantity to equate on the inner cylinder face of clip seat (5) upper end, and fasten mutually, use a holding screw (3) that coupling sleeve (1) and clip seat (5) is fixing again.

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