CN215979208U

CN215979208U - Floating casing running tool

Info

Publication number: CN215979208U
Application number: CN202121544016.0U
Authority: CN
Inventors: 孙崇磊; 李雷祥; 苗金华
Original assignee: Dezhou Zhongkai Petroleum Technology Co ltd
Current assignee: Dezhou Zhongkai Petroleum Technology Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-03-08
Anticipated expiration: 2031-07-07

Abstract

The application discloses a floating casing running tool, which comprises a sleeve, wherein an installation area is arranged in the sleeve, and a collision part is arranged on one side of the installation area; the inner core, the inner core setting has collision clearance between inner core and the collision portion in the installing zone, and can follow collision clearance motion and collide with the collision portion contact after the inner core pressure-bearing. Compare in prior art and rely on firing pin or hydraulic impact and the broken blind plate of pressure alone, have the collision clearance between inner core and the collision portion in this application, and can follow the collision clearance motion after the inner core pressure-bearing and collide with the contact of collision portion, the broken dish in the inner core is broken completely more easily under the recoil force effect that external pressure and collision produced, still is favorable to promoting crushing effect when saving time.

Description

Floating casing running tool

Technical Field

The utility model belongs to the technical field of well completion tools, and particularly relates to a floating casing running tool.

Background

With the continuous development of the drilling process technology, long horizontal section drilling becomes the trend of future oil field development, but the long horizontal section will influence the running-in of the casing and the construction of well completion operation, and the successful running-in of the casing in the horizontal section is ensured by adopting an effective technical means, which is the premise of the smooth implementation of the subsequent well completion operation.

The floating casing running technology is characterized in that a device is connected to a designed position in a casing string, and drilling fluid is filled in the casing string above the device; a sealing section of air or low-density liquid is established in a casing string below the device, so that the average density of the casing string is reduced, upward buoyancy is generated in drilling fluid, the downward friction resistance of the casing is reduced, the downward pressing weight is increased, and smooth downward pressing of the casing is guaranteed.

Most of the existing floating lower sleeves are blind plates, some blind plates need to be pressed by the outside and a firing pin is used for breaking the blind plates to realize full drift diameter, and the firing pin needs to have a long stroke in the process to obtain enough impact force to completely break the blind plates; and an autolysis type blind plate is also adopted, so that an autolysis type high-strength material is needed, but the autolysis type high-strength material starts to be dissolved automatically once meeting the drilling fluid, so that the subsequent procedure is difficult to control, and a plurality of uncertainties are brought to the downhole operation. And if a special dissolving solution is used, a special self-dissolving high-strength material is required to be matched with the special dissolving solution, so that the use cost is increased.

It will thus be seen that the prior art is susceptible to further improvements and enhancements.

SUMMERY OF THE UTILITY MODEL

The present invention provides a floating casing running tool to solve at least one of the above technical problems.

The technical scheme adopted by the utility model is as follows:

the utility model provides a floating casing running tool which comprises a sleeve, wherein an installation area is arranged in the sleeve, and a collision part is arranged on one side of the installation area; the inner core is arranged in the mounting area, a collision gap is formed between the inner core and the collision part, and the inner core can move along the collision gap after being subjected to pressure and can be in contact collision with the collision part.

As a preferred embodiment of the present invention, the sleeve includes a body joint and a lower joint connected to the body joint; the inner wall that the body connects is provided with first spacing step, the inner wall of lower clutch is provided with the spacing step of second, enclose between first spacing step and the spacing step of second the installing zone.

As a preferred embodiment of the present invention, the second limit step is the collision portion.

As a preferred embodiment of the utility model, the inner core consists of a crushing disc, a protective ring and a sliding sleeve; the crushing disc is disc-shaped, the edge of the crushing disc is covered by the protection ring, and a combined body of the crushing disc and the protection ring is matched with the first limiting step; the sliding sleeve is cylindric just the sliding sleeve with adopt clearance fit or transition fit between the installing zone.

As a preferred embodiment of the present invention, the inner core further comprises a shear pin, and the sliding sleeve is fixedly connected to the installation region through the shear pin.

In a preferred embodiment of the utility model, the side of the sliding sleeve adjacent to the crushing disk has a tip.

As a preferred embodiment of the present invention, the inner core further comprises a sealing member; the sliding sleeve side wall is provided with a ring groove, and the sealing element is arranged in the ring groove.

As a preferred embodiment of the present invention, the body joint has a first connecting portion, and the lower joint has a second connecting portion; one of the first connecting part and the second connecting part is provided with internal threads, the other of the first connecting part and the second connecting part is provided with external threads, and the body joint and the joint are connected through threads.

As a preferred embodiment of the present invention, the first connection portion and/or the second connection portion is provided with a sealing groove; the sleeve further comprises a sealing ring, and the sealing ring is arranged in the sealing groove.

In a preferred embodiment of the present invention, the smallest inner diameter of the crushing disc is smaller than the inner diameter of the mounting area, and the inner diameter of the mounting area portion after the crushing disc is completely ruptured is not smaller than the inner diameter of the other portion in the sleeve.

Due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. compare in prior art and rely on firing pin or hydraulic impact and the broken blind plate of pressure alone, have the collision clearance between inner core and the collision portion in this application, and can follow the collision clearance motion after the inner core pressure-bearing and collide with the contact of collision portion, the broken dish in the inner core is broken completely more easily under the recoil force effect that external pressure and collision produced, still is favorable to promoting crushing effect when saving time.

2. One side that the sliding sleeve is close to broken dish in this application has most advanced, and most advanced has played the effect of firing pin, has further promoted broken efficiency and the effect of broken dish, and this kind of simple structure is practical, is favorable to simplifying the structure of floating casing tool down, reduce cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view;

fig. 2 is a schematic structural view of a portion a in fig. 1.

Wherein the content of the first and second substances,

1, a body joint, 11 a first limiting step and 12 a first connecting part;

2, a lower joint, 21 a second limiting step and 22 a second connecting part;

3 mounting area, 31 collision gap;

41 crushing disc, 42 protection ring, 43 sliding sleeve, 431 tip, 432 ring groove and 44 shearing pin;

5 sealing the groove.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

1-2, the present invention provides a floating casing running tool comprising a sleeve and a crushable inner core disposed within the sleeve. Wherein, be provided with installing zone 3 in the sleeve, one side of installing zone 3 is provided with collision portion, and the inner core setting has collision clearance 31 between inner core and the collision portion in installing zone 3, and can follow collision clearance 31 after the inner core pressure-bearing and move and collide with collision portion contact.

Compared with the prior art that the impact and pressure crushing blind plate is purely dependent on the striker or hydraulic pressure, the collision gap 31 is arranged between the inner core and the collision part, the inner core can move along the collision gap 31 after bearing pressure and is in contact collision with the collision part, the crushing disc 41 in the inner core is more easily and completely crushed under the action of the recoil force generated by the external pressure and the collision, and the time is saved while the crushing effect is favorably improved.

Further, as shown in fig. 1, the sleeve includes a body joint 1 and a lower joint 2 connecting the body joint 1; the inner wall of body joint 1 is provided with first spacing step 11, and the inner wall of lower clutch 2 is provided with the spacing step 21 of second, encloses between first spacing step 11 and the spacing step 21 of second and has installing zone 3.

Further, with continued reference to fig. 1, the second limit step 21 is the collision portion.

In the present application, the specific structure of the collision portion is not particularly limited, and a separate structure or member may be provided as the collision portion.

Further, referring to fig. 1, the inner core is composed of a crushing disc 41, a protection ring 42 and a sliding sleeve 43; the crushing disc 41 is disc-shaped, the protective ring 42 covers the edge of the crushing disc 41, and a combination of the crushing disc 41 and the protective ring 42 is matched with the first limiting step 11; the sliding sleeve 43 is cylindrical and clearance fit or transition fit is adopted between the sliding sleeve 43 and the installation area 3. The arrangement of the protective ring 42 is beneficial to avoiding the crushing disc 41 from being broken due to accidental contact with the sliding sleeve 43 and the mounting area 3 in the initial pressure-bearing state, and is beneficial to ensuring the normal work of the whole floating casing running tool.

It should be noted that, the present application does not specifically limit the connection manner and connection structure between the guard ring 42 and the installation area 3, and as a preferred embodiment of the present application, the guard ring 42 and the installation area 3 in the present application are connected in a bonding manner, which is simple and convenient in bonding operation, and facilitates the driving of the guard ring 42 and the sliding sleeve 43 to move downward together after the crushing disc 41 bears the pressure, thereby avoiding the influence of an additional connection structure or connection member on the operation of the crushing disc 41.

In one particular example, and with continued reference to figure 1, the core further comprises shear pins 44, and the sliding sleeve 43 is fixedly connected to the mounting region 3 by the shear pins 44. As a preferred embodiment of the present application, referring to fig. 2, the sliding sleeve 43 has a tip 431 on a side thereof adjacent to the crushing disk 41.

In the practical application process, after the whole tool enters the well, the rupture disc firstly bears pressure, the pressure acts on the shear pin 44, the wellhead equipment is reused for pumping pressure, when the pressure reaches the shear limit of the shear pin 44, the shear pin 44 is sheared, the rupture disc pushes the sliding sleeve 43 to move downwards together under the action of the pressure, when the rupture disc and the sliding sleeve 43 move downwards together through the collision gap 31, the sliding sleeve 43 collides with the second limit step 21 on the lower connector 2, the sliding sleeve 43 is blocked, the recoil force is generated and transmitted to the rupture disc through the sliding sleeve 43, and the rupture disc is completely broken under the action of the recoil force generated by the upper pressure and the recoil force generated by the lower sliding sleeve 43, so that the inner drift diameter of the whole well is realized.

It should be noted that, the specific structure of the sliding sleeve 43 is not specifically limited in the present application, and the arrangement of the tip 431 is only a preferred embodiment of the present application, and plays a role in improving the crushing efficiency and the crushing effect. Of course, the sliding sleeve 43 in the present application may not be provided with the tip 431, or may be provided with other structures and components capable of better achieving the improvement of the crushing efficiency and the crushing effect.

Further, as shown in fig. 1, the inner core further comprises a sealing member (not shown in the figure); the sliding sleeve 43 is provided with a ring groove 432 on the side wall, and the sealing element is arranged in the ring groove 432. The sealing element is favorable for improving the sealing performance between the sliding sleeve 43 and the mounting area 3, so that the pressure initially loaded by the crushing disc 41 is prevented from leaking, and the normal operation of the subsequent descending action of the crushing disc 41 and the sliding sleeve 43 is ensured.

Further, referring to fig. 1, the body joint 1 has a first connection portion 12, and the lower joint 2 has a second connection portion 22; one of the first connecting portion 12 and the second connecting portion 22 has an internal thread and the other has an external thread, and the body joint 1 and the joint are connected by the threads. The threaded connection structure is simple and reliable, and the operation is convenient during use, thereby being beneficial to improving the assembly efficiency and the production efficiency. Of course, other different connection modes and structures such as clamping connection and the like can be adopted between the body joint 1 and the lower joint 2, and the application is not particularly limited in this respect.

Further, referring to fig. 1, the first connection portion 12 and/or the second connection portion 22 are opened with a sealing groove 5; the sleeve further comprises a sealing ring (not shown in the figures) which is arranged in the sealing groove 5. The sealing groove 5 and the sealing ring are arranged to facilitate the improvement of the sealing performance between the body joint 1 and the lower joint 2, so that the normal work of the whole floating casing running tool is ensured.

Further, referring to fig. 1, the smallest inner diameter of the crushing disk 41 is smaller than the inner diameter of the mounting area 3, and the inner diameter of the mounting area 3 portion after the crushing disk 41 is completely ruptured is not smaller than the inner diameter of the other portion in the sleeve. This arrangement is such that after the crushing discs 41 have been completely crushed, the inner diameter of the mounting region 3 portion of the sleeve is no less than the remainder of the sleeve, so that the minimum inner diameter of the floating casing running tool is the same as the inner diameter of the casing to which it is attached.

The method can be realized by adopting or referring to the prior art in places which are not described in the utility model.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A floating casing running tool, comprising:

the sleeve is internally provided with an installation area, and one side of the installation area is provided with a collision part;

the inner core is arranged in the mounting area, a collision gap is formed between the inner core and the collision part, and the inner core can move along the collision gap after being subjected to pressure and can be in contact collision with the collision part.

2. The floating casing running tool of claim 1, wherein said sleeve comprises a lower joint connecting said body joint with said body joint; the inner wall that the body connects is provided with first spacing step, the inner wall of lower clutch is provided with the spacing step of second, enclose between first spacing step and the spacing step of second the installing zone.

3. A float running tool as claimed in claim 2 wherein said second stop step is said impact portion.

4. A floating casing running tool according to claim 2 wherein said inner core is comprised of a crushing disc, a guard ring, a sliding sleeve; the crushing disc is disc-shaped, the edge of the crushing disc is covered by the protection ring, and a combined body of the crushing disc and the protection ring is matched with the first limiting step; the sliding sleeve is cylindric just the sliding sleeve with adopt clearance fit or transition fit between the installing zone.

5. The floating casing running tool of claim 4, wherein said inner core further comprises shear pins, said sliding sleeve being fixedly attached to said mounting area by said shear pins.

6. A float casing tool according to claim 4 wherein the side of the sleeve adjacent the crushing disc has a pointed end.

7. The floating casing running tool of claim 5, wherein the inner core further comprises a seal; the sliding sleeve side wall is provided with a ring groove, and the sealing element is arranged in the ring groove.

8. The floating casing running tool of claim 7, wherein the body coupling has a first connection portion and the lower coupling has a second connection portion; one of the first connecting part and the second connecting part is provided with internal threads, the other of the first connecting part and the second connecting part is provided with external threads, and the body joint and the joint are connected through threads.

9. The floating casing running tool of claim 8, wherein the first connecting portion and/or the second connecting portion is provided with a sealing groove; the sleeve further comprises a sealing ring, and the sealing ring is arranged in the sealing groove.

10. A float casing tool according to claim 9 wherein the smallest internal diameter of the crushing disc is less than the internal diameter of the mounting zone and the internal diameter of the portion of the mounting zone after the crushing disc has been fully ruptured is no less than the internal diameter of the remainder of the sleeve.