CN207813525U - Leak stoppage device is recycled with boring - Google Patents

Abstract

The utility model provides a circular plugging device while drilling, which comprises: an outer cylinder, on which at least one bypass nozzle is arranged; The perforated sliding sleeve can block the at least one bypass nozzle, the perforated sliding sleeve has a liquid flow hole that can communicate with the bypass nozzle, and the perforated sliding sleeve is connected with a ball catch claw and The ball seat, the ball catch claw is located at the upper end of the ball seat, the liquid flow hole is located above the ball catch claw; the ball basket is connected through the outer cylinder, and the ball basket is located at the Below the perforated sliding sleeve, the ball basket has at least one perforated groove set. The circulation plugging device while drilling of the utility model can effectively solve the technical problems of plugging while drilling and cleaning the cuttings bed during drilling, and greatly saves drilling time and cost.

Description

Drilling circulation plugging device

technical field

The utility model relates to the technical field of drilling, in particular to a multifunctional circulation plugging device while drilling.

Background technique

During the drilling process, an urgent problem to be solved is the plugging while drilling when the lost formation is encountered. When drilling in loss-prone formations, when lost circulation occurs, due to the directional tools such as MWD or other drilling auxiliary tools in the drilling tool assembly, the plugging material cannot pass through the drill string smoothly.

The conventional practice is that when the plugging operation is required, the well team must carry out the drilling operation, replace the drilling tool assembly and the drill bit water hole, and then carry out the drilling operation. After the plugging is completed, the drilling operation will be carried out again, and the drilling tool assembly will be replaced with the drilling tool assembly, and then the drilling operation will be 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 its disadvantage is that a tripping operation is added, which increases the time cost. However, when drilling operations in deep and ultra-deep wells, if drilling fluid leakage occurs, plugging according to conventional methods will not only increase the time cost of tripping operations, but also increase the safety risk of well control. That is, when using conventional plugging operations, the drilling fluid will continue to leak into the formation during the tripping operation, and one of the most direct consequences is to reduce the pressure of the drilling fluid column, which will lead to a decrease in the pressure of the drilling fluid column. The internal pressure cannot balance the formation pressure, which will lead to serious consequences such as overflow, well kick and even blowout.

Therefore, realizing plugging while drilling is an urgent technical problem to be solved in deep and ultra-deep wells. At the same time, when drilling operations such as horizontal wells, the debris bed is formed due to the deposition of cuttings. Cuttings are also a technical problem that needs to be solved urgently.

Utility model content

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

Above-mentioned purpose of the utility model can adopt following technical scheme to realize:

The utility model provides a circulating plugging device while drilling, which comprises:

an outer cylinder with at least one bypass nozzle;

A perforated sliding sleeve, which is axially movable through the outer cylinder, the perforated sliding sleeve can block the at least one bypass nozzle, and the perforated sliding sleeve has a function capable of connecting with the bypass nozzle A connected liquid flow hole, the opening sliding sleeve is connected with a ball catch claw and a ball seat, the ball catch claw is located at the upper end of the ball seat, and the liquid flow hole is located above the ball catch claw;

The ball basket is connected through the outer cylinder, the ball basket is located under the perforated sliding sleeve, and the ball basket has at least one perforated groove group.

In an embodiment of the present utility model, the perforated sliding sleeve has a sealing cylinder and a sliding cylinder connected to the lower end of the sealing cylinder, the liquid flow hole is opened on the sealing cylinder, and the sliding sleeve The outer diameter of the sliding cylinder is smaller than that of the blocking cylinder, and the sliding cylinder is covered with an elastic element.

In an embodiment of the present utility model, the inner wall of the outer cylinder is provided with a limiting shoulder and an abutting shoulder, the limiting shoulder is located above the abutting shoulder, and 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, and the blocking cylinder of the perforated sliding sleeve abuts against the limiting platform In the state of the shoulder, the liquid flow hole communicates with the at least one bypass nozzle.

In an embodiment of the present utility model, 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 an embodiment of the present utility model, under the condition that a resin ball is seated on the ball seat, the perforated sliding sleeve can move down relative to the outer cylinder under the action of hydraulic pressure until the plugging The cylinder abuts against the limiting shoulder.

In an embodiment of the present utility model, when the liquid flow hole is in communication 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 utility model, the inner wall of the ball basket is provided with a diameter-reducing step, and the at least one hole group is located above the diameter-reducing step.

In an embodiment of the present utility model, the upper end of the outer cylinder is provided with an O-shaped upper retaining ring, and the upper end of the perforated sliding sleeve abuts on the O-shaped upper retaining ring; the inner wall of the lower end of the outer cylinder An O-shaped lower stop ring is provided, and the lower end of the ball basket abuts on the O-shaped lower stop ring.

In an embodiment of the present utility model, the basketball basket has two perforated slot groups arranged in the axial direction, and each of the perforated groove groups has a plurality of shafts arranged at intervals along the circumferential direction of the basketball basket. to the groove.

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

The characteristics and advantages of the circulating leak plugging device while drilling of the utility model are: the circulating leak plugging device can be connected to the drill collar or the drill pipe, which effectively solves the problem of not being able to run out of the hole during the drilling process. Plugging while drilling and cleaning the cuttings bed are carried out under certain conditions, so the drilling time and drilling cost are greatly saved. Its structure is reasonable and compact, and it is easy to use.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a half-sectional view of the LWD circulation plugging device of the present invention.

Fig. 2 is a sectional view taken along line A-A of Fig. 1 .

Fig. 3 is a half-sectional view of the perforated sliding sleeve of the present invention.

Fig. 4 is a half sectional view of the basketball basket of the present invention.

Fig. 5 is a sectional view taken along line B-B of Fig. 4 .

Fig. 6 is a sectional view taken along line C-C of Fig. 4 .

Fig. 7 is a half-sectional view of the circulation plugging device while drilling of the present invention, when 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-sectional view of the circulating plugging device while drilling according to the present invention, in which resin balls and metal balls are put into the liquid flow hole of the perforated sliding sleeve with the metal balls plugged.

Fig. 9 is a half-sectional view of the resin ball and the metal ball falling to the basket in the circular plugging device while drilling of the present invention.

Fig. 10 is a half-sectional view of the circulating leak plugging device while drilling of the present invention performing multiple cycles of leak plugging operations.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, the utility model provides a circulating plugging device while drilling, which includes an outer cylinder 1, a perforated 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 movable through 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 the The bypass nozzle 11 is connected to the liquid flow hole 21, and the opening sliding sleeve 2 is connected with a ball catching claw 22 and a ball seat 23, and the ball catching claw 22 is located at the upper end of the ball seat 23. The liquid flow hole 21 is located above the ball-catching claw 22; the ball basket 3 is pierced and connected in the outer tube 1, the ball basket 3 is located below the perforated sliding sleeve 2, and the ball basket 3 has At least one opening slot set 31 .

Specifically, the outer cylinder 1 is generally in the shape of a cylinder, and its upper and lower ends are provided with a drill collar box 12 so that it can 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 Figure 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. Arranged radially opposite, each through hole 13 is internally threaded with a bypass nozzle 11, the bypass nozzle 11 is made of hard alloy material, the bypass nozzle 11 using this material, when the bypass nozzle 11 is opened, It can prevent the bypass nozzle 11 from being eroded by drilling fluid or plugging material. 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 platform above the shoulder 14.

As shown in Figure 3, the perforated sliding sleeve 2 is generally in the shape of a cylinder, and it has a plugging tube 24 and a sliding tube 25 connected to the lower end of the plugging tube 24. On the plugging cylinder 24, in this embodiment, the perforated sliding sleeve 2 is provided with two liquid flow holes 21, and the two liquid flow holes 21 are 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 that of the blocking cylinder 24 , and an elastic element 26 is sheathed on the sliding cylinder 25 , and 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 perforated sliding sleeve 2 . In the present utility model, an O-shaped upper retaining ring 16 is provided on the upper end of the outer cylinder 1, and the upper end of the perforated sliding sleeve 2 abuts on the O-shaped upper retaining ring 16, so that the perforated sliding sleeve 2 can be axially The position is limited in the outer cylinder 1. Further, a plurality of Y-shaped sealing rings 17 are provided between the perforated sliding sleeve 2 and the outer cylinder 1. A Y-shaped sealing ring 17, the dynamic sealing in the process of axial sliding can be realized between the perforated sliding sleeve 2 and the outer cylinder 1 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 rotation occurs, the liquid flow hole 21 on the perforated sliding sleeve 2 and the bypass nozzle 11 of the outer cylinder 1 cannot be aligned and communicated. The design of the ring groove 27 is to ensure Drilling fluid or lost circulation 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 leakage plugging fluid in the pipe string can effectively communicate with the bypass nozzle 11 after the perforated sliding sleeve 2 is limited downward.

The inner wall of the plugging tube 24 of the perforated sliding sleeve 2 is provided with an annular shoulder 241, the ball seat 23 is mounted on the annular shoulder 241, and the ball seat 23 and the plugging tube 24 of the perforated sliding sleeve 2 are sealed by an O-shaped seal. The ring 231 realizes static sealing, and the catch claw 22 is placed on the top of the ball seat 23. The ball catch claw 22 has a plurality of protruding claws arranged radially inward along the circumferential direction, so as to catch the resin ball 4 falling into it; The inner wall of the plugging tube 24 below the orifice 21 is provided with a jumper 28 , the upper end of the ball catcher 22 is against the jumper 28 , and the ball catcher 22 and the ball seat 23 are axially positioned by the jumper 28 .

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

As shown in Figure 4, the basketball basket 3 is generally in the shape of a cylinder, which is connected to the lower part of the outer cylinder 1, and the basketball basket 3 and the outer cylinder 1 are connected together by a threaded connection. The inner wall of the lower end of the barrel 1 is provided with an O-shaped lower stop ring 18, and the lower end of the basketball basket 3 is abutted against the O-shaped lower stop ring 18, and the O-shaped lower stop ring 18 can prevent the ball basket 3 from colliding with The phenomenon of loosening between the outer cylinders 1.

Please refer to Fig. 5 and Fig. 6, the upper part of the basketball basket 3 is provided with at least one hole group 31, in the utility model, the upper part of the basketball basket 3 is provided with two openings along the axial direction of the basketball basket Hole slot groups 31, of course, in other embodiments, the number of hole slot groups 31 can be selected according to the actual length of the basketball basket 3 or actual needs, such as one hole slot group 31 or three hole slot groups 31, or more opening slot groups 31, which are not limited here. Each hole group 31 has a plurality of axial grooves 311 arranged at intervals along the circumferential direction of the basketball basket 3. In this embodiment, each hole group 31 has four axial grooves arranged at equal intervals along the There are three axial slots 311. 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 here. Further, a diameter-reducing step 32 protrudes from the inner wall of the basketball basket 3 below at least one hole group 31 . A plurality of circulation grooves 33 are arranged at intervals along the circumferential direction of the basketball basket 3 on the basketball basket 3 below the reduced-diameter step 32. The ball baskets 3 are arranged at equal intervals in the circumferential direction. Of course, in other embodiments, there may be two, three or more circulation grooves 33, which are not limited here.

The working process of the LWD circulation plugging device is as follows: when drilling into a stratum that is prone to leakage and needs to perform plugging operations, as shown in Figure 7, there is no need to pull out the drill to replace the drilling tool, and the resin ball 4 is put into the ground through the ground, and when the resin ball 4 is After the catch claw 22 catches and sits on the ball seat 23, the drilling fluid continues to be pumped into the ground. As the pressure rises, the perforated sliding sleeve 2 moves axially downward under the action of the hydraulic pressure. When the perforated sliding sleeve 2 When the liquid flow hole 21 of the outer cylinder 1 is opposite to the bypass nozzle 11 of the outer cylinder 1, the lower end of the plugging cylinder 24 of the perforated sliding sleeve 2 is just limited to the limit shoulder 14 of the outer cylinder 1, that is, at the ball seat 23 with the resin ball 4 sitting on it, the perforated sliding sleeve 2 can move down relative to the outer cylinder 1 under the action of hydraulic pressure until the plugging cylinder 24 of the perforated sliding sleeve 2 abuts against the outer cylinder 1. Limiting shoulder 14. At this time, the plugging agent injected into the circulating plugging device 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, thereby realizing the plugging operation while drilling. After the formation plugging is completed, as shown in Figure 8, the metal ball 5 is thrown into the ground, and when the metal ball 5 falls to be tangent to the resin ball 4, the liquid flow hole 21 of the sliding sleeve 2 with the opening will be sealed. The liquid flow hole 21 of the perforated sliding sleeve 2 will be cut off by 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 LWD plugging device, and under the action of the 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 being deformed, and the metal ball 5 will also fall into the basket 3 at the same time 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. Located at the reduced-diameter step 32 of the ball basket 3, since the ball basket 3 is designed with at least one hole group 31 uniformly distributed, the effective circulation of drilling fluid can be realized. At the same time, the perforated sliding sleeve 2 moves upward to the O-shaped upper stop ring 16 under the action of the elastic element 26 to realize the limit, that is, to return to the initial position. After the perforated sliding sleeve 2 returns to the initial position, the bypass nozzle 11 of the outer cylinder 1 will be effectively sealed. After the above steps are completed, the normal drilling operation can be carried out. Similarly, in the process of drilling directional wells or horizontal wells, when it is necessary to clean the cuttings bed, the work flow is the same as that of the plugging operation, and the cleaning operation of the cuttings bed without drilling operation can be realized.

The circulation plugging device while drilling of the utility model will not have any influence on the normal working conditions during the normal drilling or circulation process. Operation, under the action of hydraulic pressure, the bypass nozzle 11 of the circulation plugging device while drilling is opened, so as to realize the plugging operation while drilling. After the plugging operation is completed, the bypass nozzle 11 is closed by the perforated sliding sleeve 2, and normal drilling or tripping operations can be carried out. The utility model can realize the cleaning operation of the 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 utility model, the cleaning of the wellbore can be realized. The cuttings bed can solve the problems of high drill string friction and bit back pressure caused by the cuttings bed. After the above-mentioned circulation is plugged or the cuttings bed is cleaned, normal drilling operations can be realized. The utility model can greatly reduce the tripping operation due to plugging and cleaning the cuttings bed in conventional wells, and can greatly save the drilling cost in deep wells and ultra-deep wells. At the same time, the utility model has the advantages of safe and reliable structural design and easy operation on site. features.

The circulation plugging device while drilling of the utility model can be connected to the drill collar or the drill pipe, which effectively solves the problem of plugging while drilling and cleaning the cuttings bed under the condition that the drill cannot be tripped. Therefore, the drilling time and drilling cost are greatly saved, and its structure is reasonable and compact, and it is easy to use.

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

Claims (10)

1. a kind of recycling leak stoppage device with brill, which is characterized in that including：

Outer barrel which is provided at least one bypass jets；

Trepanning sliding sleeve is axially displaceably threaded through in the outer barrel, and the trepanning sliding sleeve can block at least one side Logical nozzle, the trepanning sliding sleeve have the liquid flow hole that can be connected with the bypass jets, are connected with and catch in the trepanning sliding sleeve 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 barrel, and the cage is located at the lower section of the trepanning sliding sleeve, and the cage has extremely A few opening slot group.

2. recycling leak stoppage device with brill as described in claim 1, which is characterized in that the trepanning sliding sleeve has plugging barrel and connection Sliding cylinder in the plugging barrel lower end, the liquid flow hole are opened on the plugging barrel, and the outer diameter of the sliding cylinder is less than institute The outer diameter of plugging barrel is stated, is arranged and has elastic component on the sliding cylinder.

3. as claimed in claim 2 with bore recycle leak stoppage device, which is characterized in that the inner wall of the outer barrel be equipped with limit shoulder and Abutment shoulder, the limit shoulder are located at the top of the abutment shoulder, and at least one bypass jets are located at the limit The top of shoulder, the elastic element are folded between the abutment shoulder and the plugging barrel, in the envelope of the trepanning sliding sleeve Stifled cylinder is connected in the state of the limit shoulder, and the liquid flow hole is connected at least one bypass jets.

4. recycling leak stoppage device with brill as described in claim 1, which is characterized in that the outer wall of the trepanning sliding sleeve is equipped with annular groove, The liquid flow hole is connected with the annular groove.

5. recycling leak stoppage device with brill as claimed in claim 3, which is characterized in that sit the shape equipped with resin balls on the ball seat Under state, the trepanning slide under the action of hydraulic coupling can the relatively described outer barrel move down, until the plugging barrel be connected to it is described Limit shoulder.

6. recycling leak stoppage device with brill as claimed in claim 5, which is characterized in that in the liquid flow hole and the bypass jets phase Connection, and sit and be equipped in the state of metal ball in the resin balls, the metal ball can seal the liquid flow hole.

7. recycling leak stoppage device with brill as described in claim 1, which is characterized in that the inner wall of the cage is equipped with undergauge step, At least one opening slot group is located at the top of the undergauge step.

8. recycling leak stoppage device with brill as described in claim 1, which is characterized in that the upper end of the outer barrel is equipped with O shape upper baffle rings, The upper end of the trepanning sliding sleeve is connected to the O shapes and performs on ring；The lower end inner wall of the outer barrel is equipped with O shape lower gear rings, described The lower end of cage is connected on the O shapes lower gear ring.

9. recycling leak stoppage device with brill as described in claim 1, which is characterized in that the cage has axially disposed two The opening slot group, each opening slot group have the spaced multiple axial grooves of circumferencial direction along the cage.

10. recycling leak stoppage device with brill as described in claim 1, which is characterized in that between the outer barrel and the trepanning sliding sleeve Equipped with multiple y-shaped rings.