CN213450278U - Self-locking insertion head - Google Patents

Abstract

The utility model provides a from locking-type insert head, including top connection, insert head, self-locking ring, the top connection is the hollow cylinder structure that the internal diameter increases gradually, the one end and the drilling rod fixed connection that the internal diameter is big, and the one end surface that the internal diameter is little is equipped with the fixed screw, and the internal surface is equipped with the screw thread, insert head left end internal surface is equipped with the screw thread, and the surface is equipped with the draw-in groove, insert head and the little one end threaded connection of top connection internal diameter, the right-hand member of insert head is equipped with sealed O type circle, the self-locking ring internal surface is equipped with the buckle, buckle and draw-in groove fixed connection, and the self. A from locking-type insert head, conventional insert head does not take self-lock device, because the pressure that produces in the drilling rod makes insert head and insert seat separately lead to sealed inefficacy easily at the well cementation in-process to lead to the well cementation failure, can accomplish the auto-lock from locking-type insert head, reach sealed effect.

Description

Self-locking insertion head

Technical Field

The utility model belongs to insert the head field, especially, relate to a from locking-type insert head.

Background

In the field of petroleum well cementation, well cementation is an important link, well cementation is one-time engineering, and is difficult to repair under the general condition if the quality is poor, so that the requirements on the quality and the technology for the petroleum well cementation are very high, equipment is also important in the well cementation process and is a key factor for the success of the well cementation, a conventional insert head is not provided with a self-locking device, the insert head and an insert seat are easily separated by pressure generated in a drill rod in the well cementation process, the sealing is failed, and the problem is solved by designing a self-locking insert head aiming at the current situation.

Disclosure of Invention

In view of this, the utility model aims at providing a from locking-type insert head to conventional insert head does not take self-lock device, and the pressure that produces in the well cementation in-process drilling rod makes insert head and insert seat throw off easily, thereby leads to sealed failure to lead to the well cementation failure, from locking-type insert head can solve this problem.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a from locking-type insert head, includes top connection, insert head, self-locking ring, the top connection is the hollow cylinder structure that the internal diameter increases gradually, and the one end and the drilling rod fixed connection that the internal diameter is big, and the one end surface that the internal diameter is little is equipped with the set screw, and the internal surface is equipped with the screw, insert head left end internal surface is equipped with the screw, and the surface is equipped with the draw-in groove, insert head and the one end threaded connection that the internal diameter of top connection is little, the right-hand member of insert head is equipped with sealed O type circle, the self-locking ring internal surface is equipped with the buckle, buckle and draw-in.

Furthermore, the outer surface of the self-locking ring is provided with reverse-buckling teeth.

Further, the reverse buckle teeth on the outer surface of the self-locking ring are reversely buckled on the reverse buckle of the insertion seat.

Further, the sealing O-shaped ring is a hollow ring structure.

Furthermore, the right end of the insertion head is inserted into the adaptive insertion seat.

Furthermore, the material of the insertion head is alloy prepared steel.

Furthermore, the outer surface of the anti-rotation jackscrew is provided with threads.

Furthermore, the left end of the insertion head is fixedly connected with the bottommost part of the drill rod.

Furthermore, the clamping groove on the outer surface of the left end of the insertion head is of a rectangular groove structure.

Compared with the prior art, the self-locking insertion head has the following advantages:

(1) a from locking-type insert head, conventional insert head does not take self-lock device, because the pressure that produces in the drilling rod makes insert head and insert seat separately lead to sealed inefficacy easily at the well cementation in-process to lead to the well cementation failure, can accomplish the auto-lock from locking-type insert head, reach sealed effect.

(2) A from locking-type insert head, from the catch opening part be equipped with prevent changeing the jackscrew, the purpose is in order to prevent at the well cementation in-process that the rotatory landing of catch leads to not detaining, prevents that the well cementation failure from taking place.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is an overall schematic diagram of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention;

fig. 3 is a schematic view of an insertion head according to an embodiment of the present invention;

fig. 4 is a schematic view of a self-locking ring according to an embodiment of the present invention.

Description of reference numerals:

1-upper joint; 2-insertion head; 3-self-locking ring; 4-sealing the O-shaped ring; 5-anti-rotation jackscrew; 6-fixing screws; 7-a clamping groove; 8-buckling.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1-2, the self-locking device comprises an upper joint 1, an insertion head 2 and a self-locking ring 3, wherein the upper joint 1 is of a hollow cylindrical structure with gradually increasing inner diameter, one end with larger inner diameter is fixedly connected with a drill rod, the outer surface of one end with smaller inner diameter is provided with a fixing screw 6, the inner surface is provided with threads,

insert 2 left end internal surfaces of head and be equipped with the screw thread, the surface is equipped with draw-in groove 7, 2 left end internal surfaces of head and the little one end threaded connection of top connection 1 diameter, the right-hand member of head 2 is equipped with sealed O type circle 4, and it can be better sealed to be equipped with the completion of sealing washer, the utility model discloses a from locking-type insert head can accomplish the auto-lock at the well cementation in-process to thereby can be fine completion is sealed accomplishes the well cementation.

As shown in fig. 3-4, the inner surface of the self-locking ring 3 is provided with a buckle 8, the outer surface is provided with an inverted tooth buckle, the tooth buckle is connected with the inverted buckle of the adaptive insertion seat, the outer surface of the left end of the insertion head 2 is provided with a rectangular clamping groove 8, and the inner surface buckle 8 of the self-locking ring 3 is fixedly connected with the clamping groove 7 of the outer surface of the left end of the insertion head, so that the self-locking ring 3 can be prevented from rotating to cause failure of well cementation in the well cementation process.

The working principle of the self-locking insertion head is as follows: the casing pipe is firstly put in, the inserting seat matched with the utility model is found to be put into the well along with the casing pipe, the drill rod is put in after the casing pipe is put in, the drill rod is firstly fixedly connected with the hollow cylinder with the big diameter at one end of the upper joint 1, the bottommost part of the drill rod is fixedly connected with the left end of the inserting head 2, when the right end of the insertion head 2 is close to the insertion seat, the speed is reduced, the insertion head 2 is slowly inserted into the insertion seat in a matched mode by means of the dead weight of the drilling tool, an anti-rotation jackscrew 5 is arranged at an opening of the self-locking ring 3, the self-locking ring is enabled to be prevented from rotating and falling off, the self-locking ring 3 contracts under the action of the gravity, the reverse buckle teeth on the outer surface of the self-locking ring are reversely buckled on the reverse buckle of the insertion seat, self-locking is completed, the sealing O-shaped ring 4 on the insertion head 2 enters the sealing surface of the socket to complete sealing at the moment, then cement injection and well cementation are carried out, the drilling tool is rotated to enable the.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A self-locking insertion head, characterized in that: including top connection (1), insert head (2), self-locking ring (3), top connection (1) is the hollow cylinder structure that the internal diameter increases gradually, and the one end and the drilling rod fixed connection that the internal diameter is big, and the one end surface that the internal diameter is little is equipped with set screw (6), and the internal surface is equipped with the screw thread, insert head (2) left end internal surface is equipped with the screw thread, and the surface is equipped with draw-in groove (7), insert head (2) and the one end threaded connection that top connection (1) internal diameter is little, the right-hand member of insert head (2) are equipped with sealed O type circle (4), self-locking ring (3) internal surface is equipped with buckle (8), buckle (8) and draw-in groove (7) fixed connection, and self-locking ring (3) are the opening ring.

2. A self-locking insertion head according to claim 1, characterised in that: the outer surface of the self-locking ring (3) is provided with reverse-buckling teeth.

3. A self-locking insertion head according to claim 2, characterised in that: the reverse tooth on the outer surface of the self-locking ring (3) is reversely buckled on the reverse buckle of the insertion seat.

4. A self-locking insertion head according to claim 1, characterised in that: the sealing O-shaped ring (4) is a hollow ring structure.

5. A self-locking insertion head according to claim 1, characterised in that: the right end of the insertion head (2) is used for installing an insertion seat.

6. A self-locking insertion head according to claim 1, characterised in that: the insertion head (2) is made of alloy modulation steel.

7. A self-locking insertion head according to claim 1, characterised in that: the outer surface of the anti-rotation jackscrew (5) is provided with threads.

8. A self-locking insertion head according to claim 1, characterised in that: the left end of the insertion head (2) is fixedly connected with the bottommost part of the drill rod.

9. A self-locking insertion head according to claim 1, characterised in that: the clamping groove (7) is of a rectangular groove structure.

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