CN109931019A - Leak stoppage device is recycled with boring - Google Patents

Abstract

The present invention provides one kind to recycle leak stoppage device with brill comprising: outer cylinder which is provided at least one bypass jets；Aperture sliding sleeve, it is axially displaceably threaded through in the outer cylinder, the aperture sliding sleeve can block at least one described bypass jets, the aperture sliding sleeve has the liquid flow hole that can be connected with the bypass jets, it is connected in the aperture sliding sleeve and catches ball pawl and ball seat, the upper end caught ball pawl and be located at the ball seat, the liquid flow hole are located at the top for catching ball pawl；Cage wears and is connected in the outer cylinder, and the cage is located at the lower section of the aperture sliding sleeve, and the cage has at least one opening slot group.The technical issues of of the invention recycles leak stoppage device with brill, can effectively solve the plugging while drilling in drilling process and clears up cutting bed, is greatly saved drilling time and drilling cost.

Description

Circulation plug while drilling

technical field

The invention relates to the technical field of drilling, in particular to a multi-functional circulation plugging device while drilling.

Background technique

In the drilling process, an urgent problem that needs to be solved is the problem of plugging while drilling when the lost formation is encountered. When drilling into formations that are prone to leakage, when a lost circulation occurs, the plugging material cannot pass through the drill string smoothly due to the presence of directional instruments such as MWD or other drilling aids in the drilling tool assembly.

The conventional practice is that when it is necessary to plug the leakage, the well team must carry out the drilling operation. After replacing the drilling tool assembly and the drill bit water hole, the drilling operation is carried out, and the drilling operation is carried out to the leakage layer, and then the pump is pumped from the surface to plug the leakage. After the plugging is completed, the tripping operation is carried out, and the drilling tool assembly is replaced, and then the drilling operation is carried out normally. In the process of drilling in shallow wells, the conventional plugging operation meets the technical requirements of plugging to a certain extent, but the disadvantage is that one tripping operation is added, that is, the time cost is increased. However, when drilling operations in deep wells and ultra-deep wells, if there is a loss of drilling fluid, if the conventional method is used to plug the leakage, it will not only increase the time cost of tripping, but also increase the safety risk of well control. That is, when using conventional plugging operations, during the tripping operation, the drilling fluid will continue to leak into the formation, and one of the most direct consequences is the reduction of the drilling fluid column pressure, which will cause the wellbore to decrease. The internal pressure cannot balance the formation pressure, which will lead to serious consequences such as overflow, well kick and even blowout.

Therefore, the realization of plugging while drilling is an urgent technical problem facing deep and ultra-deep wells. At the same time, during drilling operations such as horizontal wells, due to the deposition of cuttings, a cuttings bed is formed. Under the action of the cuttings bed, the friction of the drilling tool increases, resulting in the phenomenon of bit holding pressure. Therefore, the drilling cycle is carried out to clean the rock. Cuttings are also a technical problem to be solved urgently in drilling.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a circulation plugging device while drilling, which can effectively solve the technical problems of plugging while drilling and cleaning the cuttings bed during the drilling process, and greatly saves drilling time and drilling cost.

Above-mentioned purpose of the present invention can adopt following technical scheme to realize:

The invention provides a circulation plugging device while drilling, which comprises:

an outer cylinder, which is provided with at least one bypass nozzle;

A perforated sliding sleeve, which is axially movably penetrated in the outer cylinder, the perforated sliding sleeve can block the at least one bypass nozzle, and the perforated sliding sleeve has a function that can be connected with the bypass nozzle a connected liquid flow hole, the opening sliding sleeve is connected with a ball catching claw and a ball seat, the ball catching claw is located at the upper end of the ball seat, and the liquid flow hole is located above the ball catching claw;

The basketball basket is pierced and connected in the outer cylinder, the basketball basket is located under the opening sliding sleeve, and the basketball basket has at least one opening slot group.

In an embodiment of the present invention, the opening sliding sleeve has a plugging cylinder and a sliding cylinder connected to the lower end of the plugging cylinder, the liquid flow hole is opened on the plugging cylinder, and the sliding cylinder The outer diameter of the cylinder is smaller than the outer diameter of the blocking cylinder, and an elastic element is sleeved on the sliding cylinder.

In an embodiment of the present invention, the inner wall of the outer cylinder is provided with a limit shoulder and an abutment shoulder, the limit shoulder is located above the abutment shoulder, and the at least one bypass nozzle is located at the Above the limiting shoulder, the elastic element is sandwiched between the abutting shoulder and the blocking cylinder, and the blocking cylinder of the opening sliding sleeve abuts on the limiting shoulder In the state of , the liquid flow hole is communicated with the at least one bypass nozzle.

In an embodiment of the present invention, an annular groove is provided on the outer wall of the perforated sliding sleeve, and the liquid flow hole communicates with the annular groove.

In the embodiment of the present invention, when the resin ball is seated on the ball seat, the opening sliding sleeve can move down relative to the outer cylinder under the action of hydraulic pressure until the blocking cylinder is abutting against the limiting shoulder.

In an embodiment of the present invention, in a state in which the liquid flow hole is communicated with the bypass nozzle and a metal ball is seated on the resin ball, the metal ball can seal the liquid flow hole.

In an embodiment of the present invention, the inner wall of the basketball basket is provided with a diameter-reducing step, and the at least one opening slot group is located above the diameter-reducing step.

In the embodiment of the present invention, the upper end of the outer cylinder is provided with an O-shaped upper retaining ring, and the upper end of the opening sliding sleeve abuts on the O-shaped upper retaining ring; the inner wall of the lower end of the outer cylinder is provided with an O-shaped upper retaining ring. There is an O-shaped lower ring, and the lower end of the basketball basket abuts on the O-shaped lower ring.

In an embodiment of the present invention, the basketball basket has two sets of opening grooves arranged in the axial direction, and each of the opening groove groups has a plurality of axial directions arranged at intervals along the circumferential direction of the basketball goal. groove.

In an embodiment of the present invention, a plurality of Y-shaped sealing rings are arranged between the outer cylinder and the opening sliding sleeve.

The features and advantages of the circulating-while-drilling plugging device of the present invention are: the circulating-while-drilling plugging device can be connected to the position of the drill collar or to the position of the drill pipe, which effectively solves the problem of not being able to run the drill during the drilling process. Therefore, the drilling time and drilling cost are greatly saved, and the structure is reasonable and compact, and the operation is convenient.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a half cross-sectional view of the circulation-while-drilling leak stopper of the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 .

FIG. 3 is a half cross-sectional view of the opening sliding sleeve of the present invention.

FIG. 4 is a half cross-sectional view of the basketball basket of the present invention.

FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 4 .

FIG. 6 is a cross-sectional view taken along the line C-C in FIG. 4 .

Fig. 7 is a half-section view of the circulating plugging device of the present invention in a state in which resin balls are put in and the liquid flow hole of the perforated sliding sleeve communicates with the bypass nozzle of the outer cylinder.

Fig. 8 is a half-section view of the circulating LWD device of the present invention in a state where resin balls and metal balls are put in and the metal balls block the liquid flow holes of the opening sliding sleeve.

Fig. 9 is a half cross-sectional view of the resin ball and the metal ball falling to the ball basket in the circulating LWD device of the present invention.

FIG. 10 is a half cross-sectional view of the circulation plugging device while drilling of the present invention performing multiple circulation plugging operations.

Detailed ways

The technical solutions in 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 , the present invention provides a circulation plugging device while drilling, which includes an outer cylinder 1, an opening sliding sleeve 2 and a ball basket 3, wherein: the outer cylinder 1 is provided with at least one bypass nozzle 11; The perforated sliding sleeve 2 is axially movably penetrated in the outer cylinder 1 , the perforated sliding sleeve 2 can block the at least one bypass nozzle 11 , and the perforated sliding sleeve 2 has the ability to communicate with all the other nozzles. The liquid flow hole 21 communicated with the bypass nozzle 11, the opening sliding sleeve 2 is connected with a ball catching claw 22 and a ball seat 23, the ball catching claw 22 is located at the upper end of the ball seat 23, the liquid The flow hole 21 is located above the ball catching claw 22; the ball basket 3 is penetrated and connected in the outer cylinder 1, and the ball basket 3 is located below the opening sliding sleeve 2, and the ball basket 3 has at least A set of opening slots 31 .

Specifically, the outer cylinder 1 is generally cylindrical, and the upper and lower ends of the outer cylinder 1 are provided with drill collar female buckles 12 so as to be directly connected with the drill collar. The upper part of the outer cylinder 1 is provided with at least one through hole 13. In this embodiment, as shown in FIG. 2 , the upper part of the outer cylinder 1 is provided with two through holes 13 along the circumferential direction of the outer cylinder 1. The two through holes 13 They are arranged diametrically opposite each other, and each through hole 13 is internally threaded with a bypass nozzle 11. The bypass nozzle 11 is made of cemented carbide material. When the bypass nozzle 11 is made of this material, when the bypass nozzle 11 is opened, The bypass nozzle 11 can be prevented from being eroded by drilling fluid or plugging materials. In the present invention, the inner wall of the outer cylinder 1 is provided with a limiting shoulder 14 and an abutting shoulder 15, the limiting shoulder 14 is located above the abutting shoulder 15, and at least one bypass nozzle 11 is located on the limiting shoulder 14 above.

As shown in FIG. 3 , the perforated sliding sleeve 2 is generally cylindrical and has a plugging cylinder 24 and a sliding cylinder 25 connected to the lower end of the blocking cylinder 24. The liquid flow hole 21 of the perforated sliding sleeve 2 is opened in the sealing cylinder 24. On the plugging cylinder 24 , in this embodiment, the opening sliding sleeve 2 is provided with two liquid flow holes 21 , and the two liquid flow holes 21 are arranged radially opposite to each other so as to correspond to the two through holes 13 on the outer cylinder 1 . The outer diameter of the sliding cylinder 25 is smaller than the outer diameter of the blocking cylinder 24 , and an elastic element 26 is sleeved on the sliding cylinder 25 . In this embodiment, the elastic element 26 is a compression spring. The elastic element 26 is sandwiched between the abutting shoulder 15 of the outer cylinder 1 and the blocking cylinder 24 of the opening sliding sleeve 2 . In the present invention, the upper end of the outer cylinder 1 is provided with an O-shaped upper retaining ring 16, and the upper end of the opening sliding sleeve 2 abuts on the O-shaped upper retaining ring 16, so that the opening sliding sleeve 2 can be axially limited It is located in the outer cylinder 1. Further, a plurality of Y-shaped sealing rings 17 are arranged between the opening sliding sleeve 2 and the outer cylinder 1 . A Y-shaped sealing ring 17, between the opening sliding sleeve 2 and the outer cylinder 1, can realize the dynamic sealing in the process of axial sliding through the Y-shaped sealing ring 17.

In the present invention, the outer wall of the perforated sliding sleeve 2 is provided with an annular groove 27 , and the liquid flow hole 21 communicates with the annular groove 27 . During the downward process of the perforated sliding sleeve 2, if the rotation occurs, the flow hole 21 on the perforated sliding sleeve 2 will not be able to communicate with the bypass nozzle 11 of the outer cylinder 1. The design of the ring groove 27 is to ensure The drilling fluid or plugging fluid can enter the bypass nozzle 11 of the outer cylinder 1 through the annular groove 27 . The design of the annular groove 27 can ensure that the drilling fluid or plugging fluid in the pipe string can communicate effectively with the bypass nozzle 11 after the opening sliding sleeve 2 descends to limit the position.

An annular shoulder 241 is provided on the inner wall of the blocking cylinder 24 of the opening sliding sleeve 2, the ball seat 23 is mounted on the annular shoulder 241, and an O-shaped seal is used between the ball seat 23 and the blocking cylinder 24 of the opening sliding sleeve 2 The ring 231 realizes static sealing, and the ball catching claw 22 is placed above the ball seat 23. The ball catching claw 22 has a plurality of convex claws arranged radially inward in the circumferential direction, so as to realize the capture of the falling resin balls 4; The inner wall of the blocking cylinder 24 below the flow hole 21 is provided with a retaining spring 28 .

In the state that the blocking cylinder 24 of the opening sliding sleeve 2 blocks at least one bypass nozzle 11 on the outer cylinder 1, the upper end of the opening sliding sleeve 2 abuts on the O-shaped upper blocking ring 16; When the blocking cylinder 24 of the sleeve 2 is in contact with the limiting shoulder 14 , the liquid flow hole 21 communicates with at least one bypass nozzle 11 .

As shown in FIG. 4 , the ball basket 3 is generally cylindrical, which is connected to the lower part of the outer cylinder 1, and the ball basket 3 and the outer cylinder 1 are connected together by means of screw connection. In the present invention, the outer cylinder is The inner wall of the lower end of 1 is provided with an O-shaped lower baffle ring 18, and the lower end of the basketball basket 3 abuts on the O-shaped lower baffle ring 18. The O-shaped lower baffle ring 18 can avoid the occurrence of underground vibration. The loosening phenomenon between the cylinders 1.

Please refer to FIG. 5 and FIG. 6 , the upper part of the basketball basket 3 is provided with at least one opening slot group 31 . In the present invention, the upper part of the basketball basket 3 is provided with two opening holes along the axial direction of the basketball basket 3 Of course, in other embodiments, the number of the opening slot groups 31 can be selected according to the actual length of the basketball basket 3 or the actual needs, for example, one opening slot group 31 or three opening slot groups 31. , or more groups of opening slots 31, which are not limited here. Each opening groove group 31 has a plurality of axial grooves 311 arranged at intervals along the circumferential direction of the basketball basket 3 . Of course, in other embodiments, each opening slot group 31 may be provided with two, three or more axial slots 311 according to actual needs, which is not limited herein. Further, a diameter reducing step 32 is protruded on the inner wall of the basketball basket 3 below the at least one opening groove group 31 . A plurality of circulation grooves 33 are arranged on the basketball basket 3 below the diameter-reducing step 32 along the circumferential direction of the basketball basket 3 . They are arranged on the basketball basket 3 at equal intervals in the circumferential direction. Of course, in other embodiments, the flow grooves 33 may also be two, three or more, which is not limited herein.

The working process of the circulation plugging device while drilling is as follows: when a leak-prone formation needs to be plugged, as shown in Figure 7, there is no need to trip out to replace the drilling tool, and the resin ball 4 is thrown into the ground. After the ball catching claw 22 catches and sits on the ball seat 23, the ground continues to pump drilling fluid. With the increase of pressure, the opening sliding sleeve 2 moves axially downward under the action of hydraulic pressure. When the opening sliding sleeve 2 When the liquid flow hole 21 is opposite to the bypass nozzle 11 of the outer cylinder 1, the lower end of the blocking cylinder 24 of the opening sliding sleeve 2 is just limited to the limiting shoulder 14 of the outer cylinder 1, that is, in the ball seat In the state where the resin balls 4 are seated on the 23, the opening sliding sleeve 2 can move down relative to the outer cylinder 1 under the action of hydraulic pressure until the blocking cylinder 24 of the opening sliding sleeve 2 abuts against the outer cylinder 1. Limit shoulder 14. At this time, the plugging agent injected into the circulation plugging while drilling will enter the formation through the liquid flow hole 21 of the perforated sliding sleeve 2 and the bypass nozzle 11 of the outer cylinder 1 to realize the plugging while drilling operation. After the plugging of the ground formation is completed, as shown in Figure 8, the metal ball 5 is put into the ground. When the metal ball 5 falls to be tangent to the resin ball 4, the liquid flow hole 21 of the opening sliding sleeve 2 is sealed. The liquid flow hole 21 of the perforated sliding sleeve 2 will be cut off by the metal ball 5, that is, when the liquid flow hole 21 is communicated with the bypass nozzle 11 and the metal ball 5 is seated on the resin ball 4, the metal ball 5 The ball 5 can seal the liquid flow hole 21; at this time, the ground continues to pump drilling fluid into the circulating LWD device. Under the action of hydraulic pressure, when the pressure increases to a certain value, as shown in Figure 9 and Figure 10 , the resin ball 4 will fall into the basket 3 through the ball seat 6 after deformation, and the metal ball 5 will also fall into the basket 3 because the outer diameter is smaller than the resin ball 4, and both the resin ball 4 and the metal ball 5 will be stuck It is arranged at the diameter-reduced step 32 of the ball basket 3, since the ball basket 3 is designed with at least one opening groove group 31 of uniform design, which can realize the effective circulation of drilling fluid. At the same time, under the action of the elastic element 26 , the opening sliding sleeve 2 moves upward to the position of the O-shaped upper stop ring 16 to realize the limit, that is, it returns to the initial position. After the opening sliding sleeve 2 returns to the original position, the bypass nozzle 11 of the outer cylinder 1 will be effectively sealed. After the above steps are completed, normal drilling operations can be carried out. Similarly, in the process of drilling directional wells or horizontal wells, when the cuttings bed needs to be cleaned up, the work flow is the same as that of the plugging operation, so that the cleaning operation of the cuttings bed that cannot be drilled can be realized.

The circulating-while-drilling plugging device of the present invention will not have any influence on the normal working conditions during the normal drilling or circulation process. , under the action of hydraulic pressure, the bypass nozzle 11 of the LWD circulation plugging device is opened, so as to realize the LWD leakage plugging operation. After the plugging operation is completed, the bypass nozzle 11 is closed by the opening sliding sleeve 2, and the normal drilling or tripping operation can be carried out. The present invention can realize the cleaning operation of cuttings bed in the process of drilling directional wells, horizontal wells and extended-reach wells, that is, in normal drilling operations, by opening the bypass nozzle 11 of the present invention, the rock cuttings in the wellbore can be cleaned up. Chip bed, to solve the problem of high drill string friction and bit holding pressure caused by the chip bed. After the above-mentioned circulation plugging or cleaning of the cuttings bed, the normal drilling operation can be realized. The invention can greatly reduce the tripping operation for plugging and cleaning cuttings beds in conventional wells, and can greatly save drilling costs in deep and ultra-deep wells.

The circulation plugging device while drilling of the present invention can be connected to the position of the drill collar and the position of the drill pipe, which effectively solves the operation of plugging the leakage while drilling and cleaning the cuttings bed under the condition that the drilling can not be carried out during the drilling process. Therefore, the drilling time and drilling cost are greatly saved, the structure is reasonable and compact, and the use is convenient.

The above are only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims (10)

1. a circulating plugging device while drilling is characterized in that, comprising: an outer cylinder, which is provided with at least one bypass nozzle; A perforated sliding sleeve, which is axially movably penetrated in the outer cylinder, the perforated sliding sleeve can block the at least one bypass nozzle, and the perforated sliding sleeve has a function that can be connected with the bypass nozzle a connected liquid flow hole, the opening sliding sleeve is connected with a ball catching claw and a ball seat, the ball catching claw is located at the upper end of the ball seat, and the liquid flow hole is located above the ball catching claw; The basketball basket is pierced and connected in the outer cylinder, the basketball basket is located under the opening sliding sleeve, and the basketball basket has at least one opening slot group. 2. The circulating leakage plugging device according to claim 1, wherein the opening sliding sleeve has a plugging cylinder and a sliding cylinder connected to the lower end of the plugging cylinder, and the liquid flow hole is provided with a plugging cylinder. On the blocking cylinder, the outer diameter of the sliding cylinder is smaller than the outer diameter of the blocking cylinder, and an elastic element is sleeved on the sliding cylinder. 3 . The circulating leakage stopper according to claim 2 , wherein the inner wall of the outer cylinder is provided with a limit shoulder and an abutment shoulder, and the limit shoulder is located on the abutment shoulder. 4 . above, the at least one bypass nozzle is located above the limiting shoulder, the elastic element is sandwiched between the abutting shoulder and the blocking cylinder, at the opening of the sliding sleeve The liquid flow hole is communicated with the at least one bypass nozzle when the blocking cylinder is in contact with the limiting shoulder. 4 . The circulating-while-drilling leak stopper according to claim 1 , wherein the outer wall of the opening sliding sleeve is provided with an annular groove, and the liquid flow hole is communicated with the annular groove. 5 . 5 . The circulating leakage stopper according to claim 3 , wherein in the state where the resin ball is seated on the ball seat, the opening sliding sleeve can be relatively The outer cylinder moves down until the blocking cylinder abuts on the limiting shoulder. 6 . The circulating leakage stopper according to claim 5 , wherein, in a state in which the liquid flow hole is communicated with the bypass nozzle, and a metal ball is seated on the resin ball, The metal ball can seal the flow hole. 7 . The circulating leakage stopper according to claim 1 , wherein the inner wall of the basketball basket is provided with a diameter-reducing step, and the at least one opening slot group is located above the diameter-reducing step. 8 . 8. The circulation plugging device according to claim 1, wherein the upper end of the outer cylinder is provided with an O-shaped upper retaining ring, and the upper end of the opening sliding sleeve abuts on the O-shaped On the stop ring; the inner wall of the lower end of the outer cylinder is provided with an O-shaped lower stop ring, and the lower end of the basketball basket abuts on the O-shaped lower stop ring. 9 . The circulating leakage stopper according to claim 1 , wherein the ball basket has two sets of opening grooves arranged along the axial direction, and each set of opening grooves has A plurality of axial grooves are arranged at intervals in the circumferential direction of the basketball basket. 10 . The circulation plugging device according to claim 1 , wherein a plurality of Y-shaped sealing rings are arranged between the outer cylinder and the opening sliding sleeve. 11 .