CN201778708U

CN201778708U - Embedded rock core grabber of coring tool

Info

Publication number: CN201778708U
Application number: CN2010201614135U
Authority: CN
Inventors: 孙琦; 任颖铭
Original assignee: BEIJING JIAOYANGSHANSHUI PETROLEUM ENGINEERING TECHNOLOGY Co Ltd
Current assignee: Sunny landscape (Jiangsu) oil and Gas Engineering Technology Co., Ltd.
Priority date: 2010-04-16
Filing date: 2010-04-16
Publication date: 2011-03-30
Anticipated expiration: 2020-04-16

Abstract

The utility model discloses an embedded rock core grabber of a coring tool, in particular to an embedded rock core grabber which is suitable for coring hard, medium hard, soft, loose and crushed strata. Rock cores which are formed in the process of coring can be cut off and borne. The embedded rock core grabber is suitable for coring various strata in drilling wells of petroleum, geology, hydrology, coal mines and the like. As shown in Figure 3, the embedded rock core grabber of the coring tool comprises a rock core grabber main body 1, a rock core grabber piece 2, a rock core grabber rivet 3, an external cylinder 4 and an internal cylinder 5. After the tool enters a well, the coring tool lifts cut cores after coring rock cores; if the coring tool is positioned in hard and medium hard strata, a clamp type rock core grabber jams and cuts cores; when the coring tool is positioned in loose, soft and crushed strata, because the clamp type rock core grabber is inoperative, the rock core grabber piece 2 in the embedded rock core grabber of the coring tool is released with the upward movement of the internal cylinder 5 and shrinks towards the center of the internal cylinder 5 to bear the rock cores in the internal cylinder 5; and when the coring tool continues to move upwards, the internal cylinder 5 drives the external cylinder 4 of the coring tool to move upwards together, and the rock cores are brought to the ground together with the coring tool.

Description

The built-in core pawl of a kind of coring tool

One, technical field:

The utility model relates to a kind of oil, the built-in core pawl of geology coring tool.Particularly a kind of be fit to hard, in hard, soft, loose, built-in core pawl that broken formation is got core, get that the core that forms in the core process can cut off and the support core.This built-in core pawl is suitable for the core work on the various stratum in the drilling wells such as oil, geology, the hydrology, colliery.

Two, background technology:

At present, the coring tool kind is a lot of both at home and abroad, be two kinds of clamping hoop type core pawl and adding pressure type core pawls, they directly contact with core, clamping hoop type core pawl is mainly used in hard formation, on carry the locking core, adding pressure type core pawl is mainly used in the scall coring operation, can pressurize to shrink and cuts core and support core.Built-in core pawl was hidden between inner core and the urceolus when the built-in core pawl of a kind of coring tool was got core, can be used for the soft or hard loose and broken formation, not influencing core drill advances, when cutting the core trip-out, the motionless built-in core pawl of the up urceolus of inner core stretches out and shrinks the chucking core to the center, with the up core that cuts off of urceolus.Also do not find to have this type of built-in core pawl both at home and abroad.

Three, utility model content:

The utility model is to provide the different a kind of coring tool of a kind of structure built-in core pawl, and it is made up of core pawl main body, core calvus, core pawl rivet.

Task of the present utility model is finished as follows, and it is made up of core pawl main body 1, core calvus 2, core pawl rivet 3.The built-in core pawl of a kind of coring tool main body 1 is the tubular body of a hollow, upper end bearing step in urceolus, core pawl main body 1 circumference has a plurality of square holes, is convenient to install core calvus 2, the lower end has and the corresponding circular hole of square hole, is used for the riveted joint of core pawl rivet 3 riveted joint core calvus 2.Each square hole is corresponding with core calvus 2.Core calvus 2 is arc steel plates, when not working, is between inner core and the urceolus, be straight shape, when needs support core, core calvus 2 is when relative the drawing back of inner core and urceolus, core calvus 2 is ejected, and the reed natural torsion is drawn close to the center, reaches the purpose of support core.Core pawl rivet 3 is a cylinder tingle, is used for core calvus 2 is fixed on core pawl main body 1, in order to avoid the well that falls during core calvus 2 support cores, reaches and cuts off core and stop passing through of core in the inner core.

Four, description of drawings:

Fig. 1 is the upright sectional drawing of the built-in core pawl of a kind of coring tool of the utility model

Fig. 2 is the built-in core pawl of a kind of coring tool of a utility model natural torsion sectional drawing

The built-in core pawl of a kind of coring tool of Fig. 3 the utility model is the combination section at tube place outer tube

Among the figure: 1-core pawl main body, 2-core calvus, 3-core pawl rivet, 4-urceolus, 5-inner core

Five, the specific embodiment:

As shown in Figure 1, the built-in core pawl of a kind of coring tool is made up of core pawl main body 1, core calvus 2, core pawl rivet 3, urceolus 4, inner core 5.Core pawl main body 1 is the tubular body of a hollow, and there are a plurality of square holes the centre, and a circular hole that is used to wear core pawl rivet 3 is arranged under each square hole.Be fitted with core calvus 2 in each square hole mutually, core calvus 2 is curved, on have a hole consistent with core pawl main body, be convenient to core pawl rivet 3 riveted joint.After the built-in core pawl assembling of a kind of coring tool is finished, consistent with the built-in core pawl of a kind of coring tool natural torsion sectional drawing 2, after on being assembled to coring tool, core calvus 2 is subjected to the constraint of coring tool inner core 5 and urceolus 4, consistent with the built-in core pawl of a kind of coring tool sectional drawing 1, Fig. 3 is the sectional drawing after the built-in core pawl of a kind of coring tool is assembled into instrument.When cutting core, last extraction core instrument, at first coring tool inner core 5 is up, the built-in core pawl of a kind of coring tool is motionless, and core calvus 2 is released, and core calvus 2 encases the core in the inner core 2 under the elastic force of nature, along with coring tool continues up, chucking is also held rock core, and urceolus 4 can be finished the core process of getting with inner core 5 up proposition cores.

After instrument is gone into well, got to carry on the coring tool behind the core and cut core, in at hard, medium ground, stuck and cut core by clamping hoop type core pawl, during, broken formation loose, soft, because clamping hoop type core pawl is inoperative when meeting, at this moment along with inner core 5 is up, core calvus 2 in the built-in core pawl of a kind of coring tool is released, and shrinks the core in the support inner core 5 to inner core 5 centers.Up when the coring tool continuation, it is up together that inner core 5 drives coring tool urceolus 4, and core takes ground to coring tool, finishes core work.

Claims

1. built-in core pawl of coring tool, form by core pawl main body (1), core calvus (2), core pawl rivet (3), it is characterized in that core pawl main body (1) is the tubular body of a hollow, there are a plurality of square holes the centre, a circular hole that is used to wear core pawl rivet (3) is arranged under each square hole, be fitted with core calvus (2) in each square hole mutually, be convenient to core pawl rivet (3) riveted joint.