CN2809200Y

CN2809200Y - Thread off preventing coring tool for deep well

Info

Publication number: CN2809200Y
Application number: CN 200520020852
Authority: CN
Inventors: 赵景军
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-17
Filing date: 2005-05-17
Publication date: 2006-08-23
Anticipated expiration: 2015-05-17

Abstract

The utility model relates to a thread off preventing coring tool for a deep well. The utility model mainly solves the problem that a core in the existing coring is easy to thread off. The utility model is characterized in that steel rings (6) which are provided with openings are arranged in grooves of the corresponding positions that an inner upper cylinder (3) and a lower joint (5) of an inner cylinder are respectively connected with an inner lower cylinder (4); the connecting position of a suspension assembly (2) and the inner upper cylinder (3), and the connecting position of a safety joint (1) and the suspension assembly (2) are both connected with an inverse buckle falling preventing cap (7) by screw threads; a strip type alloy centralizing strip (8) is welded outside a centralizer. The thread off preventing coring tool for the deep well has the characteristics of firm connection and difficult thread off.

Description

The anti-tripping coring tool of deep-well

Technical field:

The utility model relates to the anti-tripping coring tool of used coring tool, especially deep-well in the petroleum geology probing field.

Background technology:

In the petroleum geology drilling process, coring is a very important job, and the core analysis by to taking out can obtain the subsurface geology data, for drilling well and oil recovery provide data.And the coring instrument of in drilling process, using at present exist in the core tube easy problem of dropout in the course of the work, cause that core is lost, destruction etc. can't remedy situation.

The utility model content:

In order to overcome the deficiency that the core tube is easily threaded off in the existing coring instrument, the utility model provides a kind of deep-well anti-tripping coring tool, and the anti-tripping coring tool of this deep-well has and is connected firmly, and is difficult for the characteristics of threading off.

The technical solution of the utility model is: the anti-tripping coring tool of this deep-well comprises safety joint, upper cylinder, suspension assembly, interior doffing, inner core lower contact, and upper cylinder and inner core lower contact are connected the corresponding position respectively with interior doffing groove is built-in with band opening steel loop; The joint that hangs the joint of assembly and upper cylinder and safety joint and suspension assembly is all by the anti-down cap of the left-hand thread that is threaded; The centralizer outside weld is connected to bar formula alloy righting strip.

Above-mentioned upper cylinder inwall has stage.

The beneficial effect that the utlity model has is: the anti-tripping coring tool of this deep-well is owing to adopted such scheme, the groove that is connected the corresponding position in upper cylinder and inner core lower contact respectively with interior doffing is built-in with band opening steel loop, when internal and external threads is thrown off relatively, the stressed closure of steel loop, then internal thread leaves external screw thread, steel loop stay outside thread recessed in; When last button, internal thread compression steel loop opening makes two groove alignment, and steel loop opens again in groove, plays the effect of anti-back-off; Again because of hang assembly outer with upper cylinder outside reach outside the safety joint with the suspension assembly outside all by the anti-down cap of the left-hand thread that has been threaded, inner core and suspension assembly and safety joint can't be moved, eliminate the generation of dropout phenomenon, it is long-pending that righting strip has increased wearing face, convenient cover mills when accident occurring simultaneously, and can repair and reuse, reduced cost of production effectively.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is A-A sectional views among Fig. 1;

Accompanying drawing 3 is A-A1 sectional views among Fig. 1;

Accompanying drawing 4 is B-B sectional views among Fig. 1;

Accompanying drawing 5 is B-B1 sectional views among Fig. 1.

1-safety joint among the figure, 2-hangs assembly, doffing in the 3-upper cylinder, 4-, the lower contact of 5-inner core, 6-steel loop, the anti-down cap of 7-, 8-righting strip, 9-stage.

The specific embodiment:

Below in conjunction with accompanying drawing will the utility model is described in further detail:

By Fig. 1 in conjunction with Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the anti-tripping coring tool of this deep-well comprises safety joint 1, upper cylinder 3, hangs assembly 2, interior doffing 4, inner core lower contact 5, upper cylinder 3 and inner core lower contact 5 are built-in with band opening steel loop 6 with the groove that interior doffing 4 is connected the corresponding position respectively, when internal and external threads is thrown off relatively, steel loop 6 stressed closures, then internal thread leaves external screw thread, steel loop 6 stay outside thread recessed in; When last button, internal thread compression steel loop 6 openings make two groove alignment, steel loop 6 opens again in groove, plays the effect of anti-back-off, and upper cylinder 3 inwalls have stage 9, upper cylinder 3 has increased screw thread seam thickness when being connected with suspension assembly 2, has avoided a button phenomenon; Hang the joint of assembly 2 and upper cylinder 3 and safety joint 1 and the joint that hangs assembly 2 all by the anti-down cap 7 of the left-hand thread that is threaded, inner core and suspension assembly 2 and safety joint 1 can't be moved, the generation of elimination dropout phenomenon effectively reduces production costs; The centralizer outside weld is connected to bar formula alloy righting strip 8, and it is long-pending that righting strip 8 has increased wearing face, and convenient cover mills when accident occurring simultaneously, and can repair and reuse.

Claims

1, the anti-tripping coring tool of a kind of deep-well, comprise safety joint (1), upper cylinder (3), hang assembly (2), interior doffing (4), inner core lower contact (5), it is characterized in that: upper cylinder (3) and inner core lower contact (5) are connected the corresponding position respectively with interior doffing (4) groove is built-in with band opening steel loop (6); The joint that hangs the joint of assembly (2) and upper cylinder (3) and safety joint (1) and suspension assembly (2) is all by the anti-down cap of the left-hand thread that is threaded (7); The centralizer outside weld is connected to bar formula alloy righting strip (8).

2, the anti-tripping coring tool of deep-well according to claim 1 is characterized in that: upper cylinder (3) inwall has stage (9).