阅读说明：本技术 随钻堵漏工具 (Leak stoppage tool while drilling ) 是由 崔龙连 崔猛 郭建华 汪海阁 徐代才 李惟轩 曹权 蒙华君 张富成 周小军 冯伟 于 2019-01-15 设计创作，主要内容包括：本发明提供一种随钻堵漏工具,包括具有多个旁通堵漏口的外壳体,所述外壳体内设有：信号采集与控制机构,具有电连接的信号接收器和控制电路板,所述信号接收器用于接收自井口投入的信号发射器的信号,并传送至所述控制电路板；堵漏机构,具有电磁阀及堵漏滑套,所述电磁阀与所述控制电路板电连接,所述电磁阀根据所述控制电路板接收的信号指令,控制所述堵漏滑套开启或关闭所述多个旁通堵漏口；供电机构,分别与所述信号接收器和所述控制电路板电连接。本发明的随钻堵漏工具,通过电磁阀控制堵漏滑套开关,实现无限次随钻堵漏施工作业。(The invention provides a leakage plugging tool while drilling, which comprises an outer shell with a plurality of bypass leakage plugging ports, wherein the outer shell is internally provided with: the signal acquisition and control mechanism is provided with a signal receiver and a control circuit board which are electrically connected, wherein the signal receiver is used for receiving a signal from a signal transmitter thrown from the wellhead and transmitting the signal to the control circuit board; the leakage stopping mechanism is provided with an electromagnetic valve and a leakage stopping sliding sleeve, the electromagnetic valve is electrically connected with the control circuit board, and the electromagnetic valve controls the leakage stopping sliding sleeve to open or close the plurality of bypass leakage stopping openings according to a signal instruction received by the control circuit board; and the power supply mechanism is electrically connected with the signal receiver and the control circuit board respectively. The leakage stoppage while drilling tool disclosed by the invention controls the opening and closing of the leakage stoppage sliding sleeve through the electromagnetic valve, so that infinite leakage stoppage while drilling construction operation is realized.)

1. The utility model provides a leak stoppage instrument along with boring which characterized in that, is including the shell body that has a plurality of bypass leak stoppage mouths, be equipped with in the shell body:

the signal acquisition and control mechanism is provided with a signal receiver and a control circuit board which are electrically connected, wherein the signal receiver is used for receiving a signal from a signal transmitter thrown from the wellhead and transmitting the signal to the control circuit board;

the leakage stopping mechanism is provided with an electromagnetic valve and a leakage stopping sliding sleeve, the electromagnetic valve is electrically connected with the control circuit board, and the electromagnetic valve controls the leakage stopping sliding sleeve to open or close the plurality of bypass leakage stopping openings according to a signal instruction received by the control circuit board;

and the power supply mechanism is electrically connected with the signal receiver and the control circuit board respectively.

2. The leak plugging while drilling tool as recited in claim 1, wherein the outer housing has a central passage, the central passage comprises an upper passage and a lower passage which are communicated with each other, the inner diameter of the upper passage is larger than that of the lower passage, a step is formed between the upper passage and the lower passage, and the plurality of bypass leak plugging ports are communicated with the lower passage; the power supply mechanism and the signal receiver are arranged in the upper channel, and the leaking stoppage sliding sleeve is axially movably arranged in the lower channel.

3. The leak plugging while drilling tool as recited in claim 2, wherein the power supply mechanism comprises a power supply bracket and a power supply battery arranged in the power supply bracket, the power supply bracket comprises a flow passage for the drilling fluid and the leak plugging agent to pass through, and the power supply battery is electrically connected with the signal receiver and the control circuit board through power supply cables respectively.

4. The leak while drilling tool as recited in claim 2, wherein the solenoid valve comprises a first solenoid valve capable of controlling the axial movement of the leak stopping sliding sleeve, the first solenoid valve is arranged on the step part, the signal receiver is arranged above the first solenoid valve, and the power supply mechanism is arranged above the signal receiver.

5. The leak plugging while drilling tool as recited in any one of claims 1 to 4, wherein an installation groove is formed in an outer wall of the outer housing, the control circuit board is arranged in the installation groove, and the installation groove is connected in a sealing manner through a sealing gland.

6. The leak-stopping while drilling tool as recited in claim 2, wherein the leak-stopping sliding sleeve comprises a sliding sleeve body and a sealing plate rotatably connected to the lower end surface of the sliding sleeve body, the sliding sleeve body has a fluid passage, the fluid passage is communicated with the lower passage, and the sliding sleeve body is provided with a plurality of sliding sleeve bypass holes communicated with the fluid passage.

7. The leak-stopping while drilling tool as recited in claim 6, wherein the sealing plate comprises two semi-circular plates capable of being opened and closed, and the two semi-circular plates are respectively and rotatably connected to the lower end face of the sliding sleeve body.

8. The leak-stopping while drilling tool as recited in claim 7, wherein the solenoid valve comprises a second solenoid valve electrically connected to the control circuit board, and the second solenoid valve can control the two semicircular plates to be opened and closed.

9. The leak stoppage while drilling tool as set forth in claim 7, wherein the two semicircular plates are disposed on the lower end surface of the sliding sleeve body in a closed state in which the plurality of sliding sleeve bypass holes of the sliding sleeve body are communicated with the plurality of bypass leak stoppage ports of the outer casing.

10. The leak-stopping while drilling tool as recited in claim 4, characterized in that a compression spring is clamped between the first solenoid valve and the leak-stopping sliding sleeve.

Technical Field

The invention relates to the technical field of well drilling plugging, in particular to a plugging tool while drilling.

Background

During the drilling operation, when drilling in weak stratum and fracture development stratum, the drilling fluid loss often occurs. After drilling a lost formation, the treatment is usually determined based on the formation conditions and the rate of loss. The leakage of the medium and small-scale drilling fluid is usually stopped by taking the treatment measures of static observation, injection of a plugging agent while drilling and the like. Under the condition of using the while-drilling instrument, such as rotary steering and a turbine, the risk that the while-drilling plugging agent erodes and blocks internal parts of the instrument is avoided, so that the instrument does not allow the while-drilling plugging agent to pass through a tool. Under the condition, the leakage stoppage can be carried out only by drilling, especially, the leakage is easy to occur in the ultra-deep well of Chongqing and Tarim, and the one-time drilling time exceeds 3 days. Repeated plugging and tripping causes low drilling efficiency and long period of deep wells, and the leakage time of some wells exceeds 100 days.

The leakage stoppage while drilling tool is arranged on the upper part of an underground instrument or a tool, when drilling fluid leaks, the leakage stoppage while drilling tool is started, and the leakage plugging agent bypasses the leakage stoppage while drilling tool to enter a shaft without passing through the underground instrument. The application of the leak-stopping tool while drilling avoids tripping caused by leak stoppage, improves the leak-stopping construction efficiency, and has important significance for improving the drilling efficiency and reducing the drilling period and cost. At present, related leakage stoppage tools while drilling exist at home and abroad, and the requirements of the leakage stoppage while drilling technology cannot be met due to limited leakage stoppage times of some tools, complex tool operation and the like.

Disclosure of Invention

The invention aims to provide a leakage stoppage tool while drilling, which realizes infinite leakage stoppage construction operation while drilling by controlling the opening and closing of a leakage stoppage sliding sleeve through an electromagnetic valve.

The above object of the present invention can be achieved by the following technical solutions:

the invention provides a leakage stoppage tool while drilling, which comprises an outer shell with a plurality of bypass leakage stoppage ports, wherein the outer shell is internally provided with:

the signal acquisition and control mechanism is provided with a signal receiver and a control circuit board which are electrically connected, wherein the signal receiver is used for receiving a signal from a signal transmitter thrown from the wellhead and transmitting the signal to the control circuit board;

the leakage stopping mechanism is provided with an electromagnetic valve and a leakage stopping sliding sleeve, the electromagnetic valve is electrically connected with the control circuit board, and the electromagnetic valve controls the leakage stopping sliding sleeve to open or close the plurality of bypass leakage stopping openings according to a signal instruction received by the control circuit board;

and the power supply mechanism is electrically connected with the signal receiver and the control circuit board respectively.

In an embodiment of the present invention, the outer casing has a central passage, the central passage includes an upper passage and a lower passage which are communicated with each other, an inner diameter of the upper passage is larger than an inner diameter of the lower passage, a step portion is formed between the upper passage and the lower passage, and the plurality of bypass leak blocking ports are communicated with the lower passage; the power supply mechanism and the signal receiver are arranged in the upper channel, and the leaking stoppage sliding sleeve is axially movably arranged in the lower channel.

In an embodiment of the invention, the power supply mechanism is provided with a power supply bracket and a power supply battery arranged in the power supply bracket, the power supply bracket is provided with a flow passage for the drilling fluid and the plugging agent to pass through, and the power supply battery is electrically connected with the signal receiver and the control circuit board through power supply cables respectively.

In an embodiment of the invention, the electromagnetic valve is provided with a first electromagnetic valve capable of controlling the axial movement of the leaking stoppage sliding sleeve, the first electromagnetic valve is arranged on the step part, the signal receiver is arranged above the first electromagnetic valve, and the power supply mechanism is arranged above the signal receiver.

In the embodiment of the invention, an installation groove is formed in the outer wall of the outer shell, the control circuit board is arranged in the installation groove, and the installation groove is connected in a sealing manner through a sealing gland.

In an embodiment of the invention, the leaking stoppage sliding sleeve comprises a sliding sleeve body and a sealing plate which can be rotatably connected to the lower end face of the sliding sleeve body, the sliding sleeve body is provided with a liquid flow channel, the liquid flow channel is communicated with the lower channel, and the sliding sleeve body is provided with a plurality of sliding sleeve bypass holes communicated with the liquid flow channel.

In an embodiment of the present invention, the sealing plate includes two semi-circular plates capable of being opened and closed, and the two semi-circular plates are respectively rotatably connected to the lower end surface of the sliding sleeve body.

In an embodiment of the present invention, the electromagnetic valve includes a second electromagnetic valve electrically connected to the control circuit board, and the second electromagnetic valve can control the two semicircular plates to be opened and closed.

In an embodiment of the present invention, the two semicircular plates are disposed on the lower end surface of the sliding sleeve body in a closed manner in a state where the plurality of sliding sleeve bypass holes of the sliding sleeve body are communicated with the plurality of bypass leakage blocking openings of the outer housing.

In an embodiment of the invention, a compression spring is clamped between the first electromagnetic valve and the leakage stoppage sliding sleeve.

The leak stoppage while drilling tool of the invention has the characteristics and advantages that: when the leakage happens underground, a signal transmitter is thrown in from a wellhead, and when the signal transmitter reaches the position of a signal receiver, a bypass leakage blocking opening of the leakage blocking while drilling tool is controlled to be opened, a downward flow passage of the leakage blocking sliding sleeve is closed, and the leakage is blocked while drilling; when the plugging construction is finished, the signal transmitter is closed, when the signal transmitter reaches the signal receiver, the downward flow channel of the plugging sliding sleeve is controlled to be opened, the bypass plugging opening of the plugging while drilling tool is closed, the drilling fluid flow channel is recovered to be normal, and normal drilling construction is started. The leakage stoppage while drilling tool controls the opening and closing of the leakage stoppage sliding sleeve through the electromagnetic valve, quickly realizes the opening and closing of a plurality of bypass leakage stoppage openings, and realizes infinite leakage stoppage while drilling construction operation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a cross-sectional view of the first state of the leak-stopping while drilling tool of the present invention.

FIG. 2 is a cross-sectional view of the while-drilling plugging tool of the present invention in a second state.

Fig. 3 is a schematic structural diagram of a sealing plate of the leak-stopping while drilling tool of the invention.

The reference numbers illustrate: 1. an outer housing; 11. a bypass leak-stopping hole; 12. an internal thread section; 13. an external threaded section; 14. a central channel; 141. an upper channel; 142. a lower channel; 143. a step portion; 15. mounting grooves; 16. a sealing gland; 2. a signal acquisition and control mechanism; 21. a signal receiver; 22. a control circuit board; 23. a signal cable; 3. a leakage stopping mechanism; 31. an electromagnetic valve; 311. a first solenoid valve; 312. a second solenoid valve; 32. a leakage stopping sliding sleeve; 321. a sliding sleeve body; 3211. a flow channel; 3212. a sliding sleeve bypass hole; 322. a semicircular plate; 33. a compression spring; 4. a power supply mechanism; 41. a power supply bracket; 411. a flow channel; 42. a power supply battery; 43. a power supply cable.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the invention provides a leak stopping tool while drilling, which comprises an outer shell 1 with a plurality of bypass leak stopping ports 11, wherein a signal acquisition and control mechanism 2, a leak stopping mechanism 3 and a power supply mechanism 4 are arranged in the outer shell 1, wherein: the signal acquisition and control mechanism 2 is provided with a signal receiver 21 and a control circuit board 22 which are electrically connected, wherein the signal receiver 21 is used for receiving signals from a signal transmitter thrown from a well head and transmitting the signals to the control circuit board 22; the leakage stopping mechanism 3 is provided with an electromagnetic valve 31 and a leakage stopping sliding sleeve 32, the electromagnetic valve 31 is electrically connected with the control circuit board 22, and the electromagnetic valve 31 controls the leakage stopping sliding sleeve 32 to open or close the plurality of bypass leakage stopping openings 11 according to a signal instruction received by the control circuit board 22; the power supply mechanism 4 is electrically connected to the signal receiver 21 and the control circuit board 22, respectively.

Specifically, the outer shell 1 is in a cylindrical shape, the upper end of the outer shell is provided with an internal thread section 12 which is convenient to be connected with a downhole tool, and the lower end of the outer shell 1 is provided with an external thread section 13 which is convenient to be connected with a drilling tool; a plurality of bypass leakage blocking openings 11 are arranged at equal intervals in the lower part of the outer shell 1 along the circumferential direction of the outer shell 1, the bypass leakage blocking openings 11 are communicated with a central channel 14 of the outer shell 1, in the embodiment, the central channel 14 comprises an upper channel 141 and a lower channel 142 which are communicated, the inner diameter of the upper channel 141 is larger than that of the lower channel 142, a step part 143 is formed between the upper channel 141 and the lower channel 142, and the bypass leakage blocking openings 11 are communicated with the lower channel 142; the power supply mechanism 4 and the signal receiver 21 of the signal acquisition and control mechanism 2 are both disposed in the upper passage 141, and the plugging sliding sleeve 32 of the plugging mechanism 3 is axially movably disposed in the lower passage 142.

In the embodiment of the present invention, the power supply mechanism 4 has a power supply bracket 41 and a power supply battery 42 disposed in the power supply bracket 41, the power supply bracket 41 has a flow passage 411 for passing the drilling fluid and the plugging agent, and the power supply battery 42 is electrically connected to the signal receiver 21 and the control circuit board 22 through a power supply cable 43, respectively.

The power supply mechanism 4 provides a power supply for the leakage stoppage tool while drilling, and ensures that the tool is powered up underground. The power supply mechanism 4 may be powered by a power supply battery 42, or may be powered by a turbine generator, which is not limited herein. The power supply support 41 of the power supply mechanism 4 is substantially cylindrical and is installed in the upper passage 141 of the outer casing 1, the power supply battery 42 is hermetically disposed in the power supply support 41, and a flow passage 411 through which drilling fluid and plugging agent pass is formed between the power supply battery 42 and the power supply support 41. In the present embodiment, a power outlet is hermetically provided at the lower end of the power supply bracket 41, and a power supply cable 43 is connected to the power outlet, and the power supply cable 43 can be electrically connected to the signal receiver 21 and the control circuit board 22 respectively.

The signal receiver 21 of the signal acquisition and control mechanism 2 is electrically connected with the control circuit board 22 through a signal cable 23, and the signal receiver 21 is positioned below the power supply mechanism 4. In this embodiment, the signal receiver 21 is installed in the upper channel 141 of the outer casing 1 and below the power supply bracket 41, the signal receiver 21 is substantially cylindrical, and is responsible for receiving signals of a signal transmitter thrown into a wellhead and then transmitting the signals to the control circuit board 22, and the control circuit board 22 controls the plugging mechanism 3 according to the received signal instructions, so as to achieve the purpose of opening or closing the plurality of bypass plugging ports 11 of the outer casing 1. In this embodiment, the wireless transmission between the signal receiver 21 and the signal transmitter belongs to the prior art, and is not described herein again, for example, the signal receiver 21 and the signal transmitter may be respectively provided with a DTD465A wireless communication module, so as to implement receiving and sending of wireless signals.

Further, an installation groove 15 is formed on an upper outer wall of the outer case 1, the control circuit board 22 is disposed in the installation groove 15, and the installation groove 15 is hermetically connected through a sealing gland 16. In this embodiment, the control circuit board 22 may be a single chip microcomputer, for example.

The plugging mechanism 3 receives the signal instruction of the signal acquisition and control mechanism 2, and controls the plugging sliding sleeve 32 to open or close the plurality of bypass plugging openings 11 on the outer shell 1 through the switch of the electromagnetic valve 31.

Specifically, the electromagnetic valve 31 of the leakage stoppage mechanism 3 has a first electromagnetic valve 311 capable of controlling the axial movement of the leakage stoppage sliding sleeve 32 in the outer shell 1, the first electromagnetic valve 311 is arranged on the step part 143 and positioned in the upper channel 141 of the outer shell 1, and the signal receiver 21 is positioned above the first electromagnetic valve 311.

The leakage stoppage sliding sleeve 32 of the leakage stoppage mechanism 3 comprises a sliding sleeve body 321 and a sealing plate rotatably connected to the lower end face of the sliding sleeve body 321, the sliding sleeve body 321 is generally cylindrical and can be axially and movably arranged in the lower passage 142 of the outer shell 1, the sliding sleeve body 321 is provided with a through liquid flow passage 3211, the liquid flow passage 3211 is communicated with the lower passage 142, and a plurality of sliding sleeve bypass holes 3212 communicated with the liquid flow passage 3211 are further formed on the side wall of the sliding sleeve body 321 along the circumferential direction at intervals. In the present invention, a compression spring 33 is interposed between the first solenoid valve 311 and the sleeve body 321.

In this embodiment, as shown in fig. 3, the sealing plate includes two semicircular plates 322 that can be opened and closed, and the two semicircular plates 322 are respectively rotatably connected to the lower end surface of the sliding sleeve body 321. Further, the electromagnetic valve 31 further includes a second electromagnetic valve 312 electrically connected to the control circuit board 22, and the second electromagnetic valve 312 can control the two semicircular plates 322 to open and close.

The operation process of the leakage stoppage while drilling tool is as follows:

when the while-drilling plugging tool receives an instruction of opening the circulating plugging port, the first electromagnetic valve 311 is started, the plugging sliding sleeve 32 is lifted to an upper dead point through magnetic force, and at the moment, a plurality of sliding sleeve bypass holes 3212 of the plugging sliding sleeve 32 are overlapped with a plurality of bypass plugging ports 11 of the outer shell 1; then, under the action of the second electromagnetic valve 312, the two semicircular plates 322 rotate to close to block the lower port of the sliding sleeve body 321 of the plugging sliding sleeve 32, as shown in fig. 2, at this time, the internal fluid of the plugging while drilling tool can only enter the oil sleeve annulus through the plurality of bypass plugging ports 11 of the outer shell 1, and cannot flow downward continuously. That is, the two semicircular plates 322 are closed and disposed on the lower end surface of the sliding sleeve body 321 in a state where the plurality of sliding sleeve bypass holes 3212 of the sliding sleeve body 321 are communicated with the plurality of bypass leakage blocking openings 11 of the outer housing 1.

When the plugging while drilling tool receives an instruction to close the circulation plugging port, the second electromagnetic valve 312 rotates the two semicircular plates 322 to open the lower port of the sliding sleeve body 321 of the plugging sliding sleeve 32, and at this time, the two semicircular plates 322 are in a vertical state, as shown in fig. 1. Then the first electromagnetic valve 311 is closed, under the combined action of the thrust of the compression spring 33 and the fluid, the plugging sliding sleeve 32 enters the initial position, at this time, the plurality of sliding sleeve bypass holes 3212 of the plugging sliding sleeve 32 do not coincide with the plurality of bypass plugging ports 11 of the outer shell 1, and the fluid in the plugging while drilling tool can only flow downwards to the drill bit through the plugging while drilling tool.

The sequence of opening the leakage plugging while drilling tool is that the leakage plugging while drilling tool is firstly opened to bypass a leakage plugging port, and then a lower flow passage of the leakage plugging sliding sleeve is closed; the sequence of closing the leakage stoppage while drilling tool is that the lower runner of the leakage stoppage sliding sleeve is opened first, and then the bypass leakage stoppage port of the leakage stoppage while drilling tool is closed.

When the leakage stoppage tool while drilling enters a well, a plurality of bypass leakage stoppage ports 11 of the leakage stoppage tool while drilling are in a closed state, and drilling fluid in the drilling process can normally circulate to a drill bit through the leakage stoppage tool while drilling.

When the leakage happens underground, the signal emitter is thrown in from the wellhead, when the signal emitter reaches the position of the signal receiver 21, the bypass leakage blocking opening 11 of the leakage blocking while drilling tool is controlled to be opened, the downward flow channel of the leakage blocking sliding sleeve 32 is closed, and the leakage blocking while drilling is carried out; when the plugging construction is finished, the signal transmitter is closed, when the signal transmitter reaches the signal receiver 21, the downward flow channel of the plugging sliding sleeve 32 is controlled to be opened, the bypass plugging opening 11 of the plugging while drilling tool is closed, the drilling fluid flow channel is recovered to be normal, and the normal drilling construction is started. The leakage stoppage while drilling tool controls the opening and closing of the leakage stoppage sliding sleeve 32 through the electromagnetic valve 31, quickly realizes the opening and closing of the plurality of bypass leakage stoppage openings 11, and realizes infinite leakage stoppage while drilling construction operation.

The above description is 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 disclosure of the application document without departing from the spirit and scope of the present invention.