CN103510877A - Inner pipe joint on drill rod - Google Patents

Abstract

The invention relates to an inner pipe joint on a drill rod. The inner pipe joint on the drill rod comprises a spring sleeve and an inner pipe upper joint body. One end of the spring sleeve is sequentially connected with an adjusting nut and an adjusting joint body in a screwed mode. An end portion of the adjusting joint body is connected with the inner pipe upper joint body with the assistance of a limiting casing pipe and provided with a radial through hole. A spring of which both ends are provided with steel balls is installed into the radial through hole and the steel balls abut against the inner wall of the limiting casing pipe with the assistance of the elasticity of the spring. The inner pipe joint on the drill rod is simple in structure. Elastic connection between the adjusting joint body and the limiting casing pipe is adopted, the original manner of adjusting the length of a drill rod in a screwed mode is changed and operational simplicity is improved.

Description

Inner pipe joint on drilling rod

Technical field

The present invention relates to geological prospecting apparatus field, relate in particular to the drilling rod of rig.

Background technology

Rig is requisite equipment in geological prospecting, and the drilling rod on rig is cylindricality strip structure, for the ease of regulating the length of drilling rod, conventionally adopts joint connecting structure on drilling rod; See Fig. 1, inner pipe joint structure on existing drilling rod is connected with inner tube top connection 3 spirals by spring 1, and regulates the bonding strength of the two by adjusting nut 2, and the shortcoming that this spiral connects is because screw thread is longer, comparatively loaded down with trivial details during connection, expend time in manyly, cause inefficiency.

Summary of the invention

The applicant, for the above-mentioned shortcoming of the inner pipe joint of existing drilling rod, studies and improves, and the inner pipe joint on a kind of drilling rod easy and simple to handle is provided.

The technical solution adopted in the present invention is as follows:

An inner pipe joint on drilling rod, comprises spring housing and inner tube top connection; One end of spring housing successively spiral connects adjusting nut and regulates joint, regulates the end of joint to be connected with inner tube top connection by limit casing; Regulate the end of joint to have radial direction through hole, in radial direction through hole, device two ends are connected with the spring of steel ball, and steel ball is the inwall near limit casing by the elastic force of spring.

Further technical scheme is:

The inwall of limit casing has annular stop groove, and steel ball is positioned at annular stop groove.

Beneficial effect of the present invention is as follows:

The present invention is simple in structure, adopts and regulates joint to be connected with the elasticity of limit casing, has changed the mode of original adjustable diameter and screw adjusting run of steel, has improved the simplicity of operation.

Accompanying drawing explanation

Fig. 1 is the main sectional view of the inner pipe joint on existing drilling rod.

Fig. 2 main sectional view of the present invention.

Fig. 3 is the A place partial enlarged drawing of Fig. 2.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.

See Fig. 2 and Fig. 3, the present invention includes spring housing 4 and inner tube top connection 8, it is characterized in that: one end of spring housing 4 successively spiral connects adjusting nut 5 and regulatesjoint 6, regulate the end ofjoint 6 to be nested withlimit casing 7, the other end oflimit casing 7 is placed in inner tube top connection 8, and the inwall oflimit casing 7 hasannular stop groove 71; Regulate the end ofjoint 6 to have radial direction throughhole 61, the interior device of radial direction throughhole 61 two ends are connected with thespring 9 ofsteel ball 10, andsteel ball 10 is theannular stop groove 71 nearlimit casing 7 by the elastic force ofspring 9.

In the present invention, adjusting nut is for regulating the degree of tightness state between joint 6 and inner tube top connection 8; By directly dragging, getlimit casing 7,limit casing 7, regulating the outer wall of joint 6 slide and position byannular stop groove 71, is realized the flexible operation of drilling rod.

More than describing is explanation of the invention, is not the restriction to invention, and limited range of the present invention is referring to claim, and without prejudice to spirit of the present invention in the situation that, the present invention can do any type of modification.

Claims (2)

1. the inner pipe joint on drilling rod, comprises spring housing and inner tube top connection, it is characterized in that: one end of described spring housing successively spiral connects adjusting nut and regulates joint, and the end of described adjusting joint is connected with described inner tube top connection by limit casing; The end of described adjusting joint has radial direction through hole, and device two ends are connected with the spring of steel ball in described radial direction through hole, and described steel ball is the inwall near described limit casing by the elastic force of spring.

2. according to the inner pipe joint on drilling rod described in claim 1, it is characterized in that: the inwall of described limit casing has annular stop groove, described steel ball is positioned at described annular stop groove.

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