CN212898413U - Self-rotating impact type casing pipe guiding device with floating valve - Google Patents

Abstract

The utility model relates to a take float valve autogyration impact type sleeve pipe guiding device, including center tube, coil spring, guide shoe cap, the center tube outer wall forms circular bead structure through the reducing, and the surface of the less end of external diameter is equipped with two at least 360 rotatory spiral slideways, guide shoe cap lateral wall install with spiral slideway complex driving pin, the driving pin passes guide shoe cap lateral wall and agrees with the spiral slideway on the center tube mutually, coil spring installs in the less end of center tube external diameter, and is compressed between the circular bead structure of guide shoe cap and center tube; the driving pin can make the guide shoe cap move axially and radially around the central tube under the action of the elastic force of the spiral spring to form rotary impact force. The utility model discloses under transferring the sleeve pipe and meeting the circumstances of hindering, the accessible lifts the mode of transferring the sleeve pipe, arouses coil spring's elasticity, makes to draw the shoes cap to be rotatory impact motion, and the broken detritus that meets the resistance.

Description

Self-rotating impact type casing pipe guiding device with floating valve

Technical Field

The utility model belongs to the technical field of oil, natural gas cementing tool, especially, relate to take float valve autogyration impacted style sleeve pipe guider.

Background

In the oil and gas industry, after a well or a portion of a well has been drilled, a casing or cementing string needs to be installed to seal the formation. Local deviation of the open hole stratum of the borehole can prevent the casing from being successfully lowered, and stratum deviation of an open hole section comprises borehole eccentricity, scouring, chipping and the like. The running string may need to be rotated during the casing running process, however, at the end of a long string, particularly at high inclination, high displacement, horizontal well sections, the running string may not be rotated, or rotation may not be encouraged. The high torque created by attempting to rotate a long casing string can cause significant damage to the threads between the casing joints and can cause a centralizer or the like to drag into the formation. In such a case, there is a high probability that the pipe string will not be able to negotiate obstacles or borehole deviations.

During casing running in a vertical well, particularly in production casing, the casing string may encounter obstructions in the wellbore, for example, due to collapse of the wellbore wall into the open hole, or due to debris that pushes the bottom end of the casing forward along the open hole. These obstacles impede the advance of the casing and require clearing the open hole in order to advance the casing to the bottom of the hole.

Typically, this requires running a separate drill string downhole, attempting to clear the obstruction, and then attempting to use the cementing string again, and conventional methods and apparatus fail to solve the problem of clearing the obstruction during casing running, which is an intangible waste of man-hours.

Therefore, based on these problems, it is of great practical significance to provide a self-rotating percussion casing guide with a float valve that can be incorporated into a casing string during cementing for clearing wellbore obstructions without rotating the casing string.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide one kind can incorporate into the casing string at the well cementation in-process for clear away the pit shaft barrier, and need not rotatory casing string take float valve autogyration impacted style sleeve pipe guiding device.

The utility model provides a its technical problem take following technical scheme to realize:

the self-rotating impact type sleeve guiding device with the floating valve comprises a central tube, a spiral spring and a shoe guiding cap, wherein the outer wall of the central tube forms a shoulder structure through reducing, the outer surface of the end with the smaller outer diameter is provided with at least two spiral slideways rotating for 360 degrees, the side wall of the shoe guiding cap is provided with a driving pin matched with the spiral slideways, the driving pin penetrates through the side wall of the shoe guiding cap to be matched with the spiral slideways on the central tube, and the spiral spring is arranged at the end with the smaller outer diameter of the central tube and compressed between the shoe guiding cap and the shoulder structure of the central tube;

the driving pin can make the guide shoe cap move axially and radially around the central tube under the action of the elastic force of the spiral spring to form rotary impact force.

Furthermore, a float valve is fixedly arranged on the inner wall of the central pipe.

Furthermore, the shoe guide device further comprises a sleeve, and the sleeve is sleeved on the shoe guide cap to limit and protect the driving pin.

Further, still include the helmet, the helmet with guide's cap fixed connection, sleeve one end is spacing through the stair structure on the guide's cap outer wall, and the other end passes through the helmet is spacing.

Furthermore, a press-fit contact surface is formed at the contact position of the protective cap and the spiral spring.

Further, the upper end of the central tube can be fixedly connected with the sleeve.

Furthermore, the floating valve and the guide shoe cap are made of drillable materials.

Furthermore, the inner wall of the central tube is connected with a float valve through threads, and a clamp spring is installed in the central tube to realize the fastening and the positioning of the float valve.

The utility model has the advantages that:

the outer surface of the central tube of the utility model is provided with at least two spiral slideways rotating 360 degrees, and the guide shoe cap can reciprocate along the radial direction and the axial direction by matching with the driving pin; the spiral spring can provide elastic force for the guide shoe cap, and when the lower casing pipe is in resistance, the elastic force of the spiral spring can be excited by lifting the lower casing pipe, so that the guide shoe cap can do rotary impact motion to break the detritus in resistance.

Drawings

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.

Fig. 1 is an exploded view of a self-rotating impact casing guide device with a float valve according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a central tube with a float valve self-rotating impact casing guide according to an embodiment of the present invention;

fig. 3 is a schematic view of a partial assembly of a center tube with a float valve self-rotating impact type casing guide device and a guide shoe cap according to an embodiment of the present invention;

Detailed Description

First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be described in detail below by way of example, but all the descriptions are only for illustrative purpose and should not be construed as forming any limitation to the present invention. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and furthermore, the terms "comprises" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

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

The present invention will be described in detail with reference to fig. 1 to 3.

As shown in fig. 1-3, the self-rotating impact type casing guiding device with a float valve provided in this embodiment includes a central tube 1, a coil spring 4, and a shoe guiding cap 7, where an outer wall of the central tube 1 forms a shoulder structure 9 through reducing, an outer surface of an end with a smaller outer diameter is provided with at least two spiral slideways 12 rotating by 360 degrees, a driving pin 8 matched with the spiral slideways 12 is installed on a side wall of the shoe guiding cap 7, the driving pin 8 passes through a side wall of the shoe guiding cap 7 and fits with the spiral slideways 12 on the central tube 1, and the coil spring 4 is installed at the end with a smaller outer diameter of the central tube 1 and is compressed between the shoe guiding cap 7 and the shoulder structure 9 of the central tube 1;

the driving pin 8 can make the guide shoe cap 7 do axial and radial motion around the central tube 1 under the action of the elastic force of the spiral spring 4 to form rotary impact force, so that the rock debris resistance in the process of lowering the casing can be broken.

The inner wall of the central tube 1 is fixedly provided with a float valve 2, so that cement slurry in the well cementation process can be prevented from returning; specifically, the inner wall of the central tube 1 is connected with the float valve 2 through threads 14, a clamp spring groove 11 is formed in the central tube 1, and a clamp spring 3 is installed, so that the float valve 2 can be prevented from loosening in the casing running circulation process.

Still include sleeve 6, helmet 5, sleeve 6 cover establish lead on the shoes cap 7 to drive round pin 8 carry on spacingly, make drive round pin 8 can not drop: the protective cap 5 is fixedly connected with the shoe guiding cap 7, one end of the sleeve 6 is limited through a step structure on the outer wall of the shoe guiding cap 7, the other end of the sleeve is limited through the protective cap 5, and a pressing contact surface is formed at the contact position of the protective cap 5 and the spiral spring 4.

The floating valve 2 and the guide shoe cap 7 in the central tube 1 are made of drillable materials, so that time and cost are saved for drilling in later operation, and the inner wall of the upper end of the central tube 1 can be fixedly connected with the sleeve through threads 13.

It should be noted that the spiral spring 4 penetrates from the lower end of the central tube 1, the upper end of the spiral spring is abutted against the shoulder structure 9 at the upper end of the central tube 1, and the lower end of the spiral spring is abutted against the step of the protective cap 5, so that the spiral spring 4 needs to be pre-stressed to be in a micro-compression state during installation;

further, the guide shoe cap 7 is not limited to the one shown in the drawings, and various types may be adopted according to the downhole situation in the field.

For example, in this embodiment, the casing guiding device is connected to the lowest end of the casing string, and is lowered into the well along with the casing string, and in the lowering process, if phenomena such as blocking occur, the casing string can move up and down, the helical spring 4 is compressed, the shoe guiding cap 7 makes axial and longitudinal movement in the designed track of the helical slideway 12, and under the elastic force action of the helical spring 4, self-rotation impact movement can be made, so that the formation debris blocked by the lower blocking can be broken, and the smooth running of casing lowering operation can be ensured. And the float valve 2 designed in the central pipe 1 can prevent cement slurry from returning in the well cementation process.

The above embodiments are described in detail, but the above description is only for the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (8)

1. Take float valve autogyration impact type sleeve pipe guiding device, its characterized in that: the outer wall of the central pipe forms a shoulder structure through reducing, at least two spiral slideways rotating by 360 degrees are arranged on the outer surface of the end with the smaller outer diameter, a driving pin matched with the spiral slideways is installed on the side wall of the guide shoe cap, the driving pin penetrates through the side wall of the guide shoe cap and is matched with the spiral slideways on the central pipe, and the spiral spring is installed at the end with the smaller outer diameter of the central pipe and is compressed between the guide shoe cap and the shoulder structure of the central pipe;

the driving pin can make the guide shoe cap move axially and radially around the central tube under the action of the elastic force of the spiral spring to form rotary impact force.

2. The self-rotating impact casing guide with float valve of claim 1, wherein: and a float valve is fixedly arranged on the inner wall of the central pipe.

3. The self-rotating impact casing guide with float valve of claim 1, wherein: the shoe guide cap is sleeved with the sleeve, and the driving pin is limited and protected by the sleeve.

4. The self-rotating impact casing guide with float valve of claim 3, wherein: the safety shoe is characterized by further comprising a protective cap, the protective cap is fixedly connected with the guide shoe cap, one end of the sleeve is limited through a step structure on the outer wall of the guide shoe cap, and the other end of the sleeve is limited through the protective cap.

5. The self-rotating impact casing guide with float valve of claim 4, wherein: the contact part of the protective cap and the spiral spring forms a pressing contact surface.

6. The self-rotating impact casing guide with float valve of claim 1, wherein: the upper end of the central tube can be fixedly connected with the sleeve.

7. The self-rotating impact casing guide with float valve of claim 1, wherein: the floating valve and the guide shoe cap are made of drillable materials.

8. The self-rotating impact casing guide with float valve of claim 2, wherein: the inner wall of the central tube is connected with a float valve through threads, and a clamp spring is installed in the central tube to realize the fastening position of the float valve.

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