CN212867404U - Casing running power tool - Google Patents

Abstract

The utility model discloses a casing power tool, which relates to the technical field of casing, the utility model comprises a hollow cylindrical shell, the upper end of the shell is in threaded connection with an upper joint for connecting a casing, the shell is in threaded connection with a turbine stator, at least two bearings are arranged in the turbine stator, a turbine shaft is arranged in each bearing, a plurality of turbine rotors are arranged outside the turbine shaft, an annular bulge is arranged outside the turbine shaft, the lower end of the annular bulge is provided with a lower part jacking mechanism, the upper end of the turbine shaft is provided with an upper part jacking mechanism, the lower part of the turbine shaft is a hollow cylinder, and a plurality of flow guide holes communicated with the hollow cylinder are circumferentially arranged outside the hollow cylinder; the utility model has the advantages of simple structure and convenient casing running to a predetermined depth.

Description

Casing running power tool

Technical Field

The utility model relates to a lower casing technical field, more specifically relate to a lower casing power tool for provide power for the lower casing.

Background

Oil and gas drilling is a technology for forming an oil and gas channel, and in order to ensure the environmental safety in drilling and prevent a shaft from collapsing, a metal casing is required to be put into a well after drilling for supporting the shaft, and the problems that the casing cannot be put into a preset depth and the shaft collapses quickly in drilling are frequently encountered in the oil and gas drilling industry.

At present, in order to solve the problem that the casing cannot be run into the predetermined depth, the existing treatment methods mainly include the following steps:

(1) lifting and lowering the casing;

(2) forcibly twisting the sleeve using a tool;

(3) connecting a recyclable joint for liquid circulation;

(4) the running in of the casing is assisted by a positive displacement motor which can be drilled and ground off.

All 4 of the above methods assist in running the casing to a desired depth by overcoming the friction between the casing and the wellbore. With the method (1), only a part of the friction force can be reduced, and the casing is still difficult to put down after being lifted up; in the method (2), the requirement on the torque resistance of the sleeve is high, a special sleeve connection mode is needed, on one hand, the cost is increased, and on the other hand, when the torque force exceeds the strength of the sleeve, the sleeve is easily damaged by twisting; with respect to method (3), plugging the circulation joints may reduce some of the friction, but the plugs may build up in the wellbore such that the casing is still not lowered to the predetermined depth; in the method (4), the requirement for the torque resistance of the casing is high, and there is a problem that the vibration amplitude is large when the casing is run in.

To solve the problem of the wellbore collapsing quickly in the well, it is necessary to run the casing as soon as possible after tripping out the drill pipe and the drill bit, but the wellbore may have collapsed before running the casing. At present, in order to solve the problem, some enterprises propose a casing drilling technology, a casing pipe is used for replacing a drill pipe, and the casing pipe is simultaneously put in after the drilling is finished, but the existing casing drilling technology has the problems of high price, high requirement on implementation conditions, complex operation procedure and the like, for example, the casing drilling technology of the wedefu company needs a special supporting tool connected with the drill pipe for supporting the inner wall of the casing pipe, and has higher requirement on the torque resistance of the casing pipe.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem of the existing auxiliary casing running method, the utility model provides a running casing power tool.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

a casing running power tool comprises a hollow cylindrical shell, the upper end of the shell is in threaded connection with an upper joint used for connecting a casing, the shell is in threaded connection with a turbine stator, at least two bearings are arranged in the turbine stator, a turbine shaft is arranged in the bearings, a plurality of turbine rotors are arranged on the outer side of the turbine shaft, an annular bulge is arranged on the outer side of the turbine shaft, a lower part jacking mechanism is arranged at the lower end of the annular bulge, an upper part jacking mechanism is arranged at the upper end of the turbine shaft, the lower part of the turbine shaft is a hollow cylinder, a plurality of flow guide holes communicated with the hollow cylinder are circumferentially arranged on the outer side of the hollow cylinder, a female joint connected with a guider is arranged at the lower end of the shell, the female joint is communicated with the hollow cylinder, specifically, an upper joint is connected with the casing needing to be run in, the drilling fluid drives the turbine rotor to rotate, the turbine rotor drives the turbine shaft and the guide device to rotate, the guide device stirs aggregates in the shaft, then the aggregates are carried to the ground by the drilling fluid, and after the aggregates are reduced, the casing can be lowered to a preset depth.

Furthermore, the upper jacking mechanism comprises a hollow adjustable sleeve which is in threaded connection in the shell, an annular pipe cover is arranged at the upper end of the adjustable sleeve, 2N (N is more than or equal to 2 and N belongs to N) locking screws which are uniformly distributed in the circumferential direction are vertically arranged at the upper end of the pipe cover, the lower ends of the locking screws are in contact with the upper end of the turbine shaft, and the uniformly distributed locking screws can jack the turbine shaft on one hand and can also realize centering on the turbine shaft on the other hand.

Further, the lower jacking mechanism comprises a thrust bearing arranged in the shell, the thrust bearing is located below the annular protrusion, and a thrust bearing spring is arranged between the upper end of the thrust bearing and the lower end of the annular protrusion.

Further, the bearing includes a central bearing located above the annular protrusion and a roller bearing located below the annular protrusion.

Further, an annular centering device is arranged on the outer side of the turbine shaft, and the outer side of the centering device is in contact with the inner side of the shell.

Furthermore, an upper joint thread protector is arranged at the upper end of the upper joint.

Furthermore, the lower end of the shell is also provided with an adapter which can be connected with a drill bit and connects the upper connector with the casing for casing drilling, so that casing drilling can be realized.

The utility model has the advantages as follows:

1. the utility model has simple structure, can reduce the aggregation in the shaft by pumping drilling fluid, is convenient for the casing to be driven into the preset depth, and has small vibration amplitude of the casing and no special requirement on the torque resistance of the casing in the process of pumping the drilling fluid;

2. the upper part jacking mechanism of the utility model comprises an adjustable sleeve, and the turbine shaft can be jacked from the upper part through a plurality of evenly distributed locking screws, so that the axial movement of the turbine shaft in the rotating process is avoided;

3. the utility model discloses a tight mechanism in lower part top includes thrust bearing, can follow the protruding below of annular and withstand the turbine shaft, avoids the turbine shaft to take place axial motion at rotatory in-process.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

reference numerals: 1-upper joint, 2-locking screw, 3-centering bearing, 4-turbine rotor, 5-thrust bearing spring, 6-thrust bearing, 7-roller bearing, 8-conversion joint, 9-female joint, 10-drill bit, 11-turbine stator, 12-turbine shaft, 13-shell, 14-adjustable sleeve and 15-upper joint thread protector.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1, the present embodiment provides a casing running power tool, including a hollow cylindrical housing 13, the upper end of the housing 13 is connected with an upper joint 1 for connecting a casing, the housing 13 is connected with a turbine stator 11 through a thread, at least two bearings are arranged in the turbine stator 11, a turbine shaft 12 is arranged in the bearings, a plurality of turbine rotors 4 are arranged outside the turbine shaft 12, an annular protrusion is arranged outside the turbine shaft 12, a lower portion jacking mechanism is arranged at the lower end of the annular protrusion, an upper portion jacking mechanism is arranged at the upper end of the turbine shaft 12, a plurality of flow guide holes communicated with the hollow cylinder are circumferentially arranged at the lower portion of the turbine shaft 12 for the hollow cylinder and the outer side, a female joint 9 connected with a guide device is arranged at the lower end of the housing 13, and the female joint 9 is communicated.

The working principle is as follows: the upper connector is connected with a sleeve to be put in, the conversion connector 8 is connected with a guide device, drilling fluid is pumped into the shell 13 through the sleeve, the drilling fluid drives the turbine rotor 4 to rotate, the turbine rotor 4 drives the turbine shaft 12 and the guide device to rotate, the guide device stirs aggregates in a shaft, then the aggregates are brought to the ground by the drilling fluid, and after the aggregates are reduced, the sleeve can be put down to a preset depth

Example 2

As shown in fig. 1, the embodiment is further improved on the basis of embodiment 1, specifically, the upper tightening mechanism includes a hollow adjustable sleeve 14 screwed in a housing 13, an annular sleeve cover is disposed at the upper end of the adjustable sleeve 14, 4 locking screws 2 uniformly distributed in the circumferential direction are vertically disposed at the upper end of the sleeve cover, the lower end of each locking screw 2 contacts with the upper end of the turbine shaft 12, and the uniformly distributed locking screws 2 can prop against the turbine shaft 12 on one hand and can also realize centering of the turbine shaft 12 on the other hand.

Example 3

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 2, and specifically, the lower tightening mechanism includes a thrust bearing 6 disposed in a housing 13, the thrust bearing 6 is located below an annular protrusion, and a thrust bearing spring 5 is disposed between an upper end of the thrust bearing 6 and a lower end of the annular protrusion.

Example 4

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 3, and specifically, the bearing includes a center bearing 3 located above the annular protrusion and a roller bearing 7 located below the annular protrusion.

Example 5

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 3, specifically, an annular centering device is disposed outside the turbine shaft 12, and the outside of the centering device is in contact with the inside of the housing 13.

Example 6

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 3, specifically, an upper joint thread protector 15 is disposed at the upper end of the upper joint 1.

Example 7

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 3, and specifically, an adapter 8 is further disposed at the lower end of the housing 13, and the adapter 8 can be connected to a drill bit 10 to connect the upper adapter 1 and a casing for casing drilling, so as to achieve casing drilling.

Claims (6)

1. A cased power tool, comprising a hollow cylindrical housing (13), the upper end of the shell (13) is connected with an upper joint (1) for connecting a sleeve in a threaded manner, the shell (13) is connected with a turbine stator (11) through internal threads, at least two bearings are arranged in the turbine stator (11), a turbine shaft (12) is arranged in the bearing, a plurality of turbine rotors (4) are arranged outside the turbine shaft (12), an annular bulge is arranged on the outer side of the turbine shaft (12), a lower part jacking mechanism is arranged at the lower end of the annular bulge, the upper end of the turbine shaft (12) is provided with an upper jacking mechanism, the lower part of the turbine shaft (12) is a hollow cylinder, the outer side of the turbine shaft is circumferentially provided with a plurality of flow guide holes communicated with the hollow cylinder, the lower end of the shell (13) is provided with a female joint (9) connected with the guider, and the female joint (9) is communicated with the hollow cylinder.

2. The casing running power tool is characterized in that the upper jacking mechanism comprises a hollow adjustable casing (14) which is in threaded connection with the inside of a shell (13), an annular casing cover is arranged at the upper end of the adjustable casing (14), 2N locking screws (2) which are uniformly distributed in the circumferential direction are vertically arranged at the upper end of the casing cover, N is more than or equal to 2 and N is equal to N, and the lower ends of the locking screws (2) are in contact with the upper end of a turbine shaft (12).

3. A running casing power tool according to claim 2, characterized in that the lower tightening mechanism comprises a thrust bearing (6) arranged in the housing (13), the thrust bearing (6) being located below the annular protrusion, and a thrust bearing spring (5) being arranged between the upper end of the thrust bearing (6) and the lower end of the annular protrusion.

4. A running casing power tool according to claim 3, characterised in that the bearings comprise a central bearing (3) above the annular protrusion and a roller bearing (7) below the thrust bearing (6).

5. A running sleeve power tool according to any one of claims 1-4, characterised in that an annular centraliser is provided on the outside of the turbine shaft (12), the outside of the centraliser being in contact with the inside of the housing (13).

6. A casing running power tool according to any one of claims 1-4, c h a r a c t e r i z e d in that the upper end of the upper joint (1) is provided with an upper joint bead (15).

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