A knock positioning straightener

Abstract

The present invention relates to the technical field of cementing of oil and gas wells, and in particular to a percussion positioning straightener to alleviate the problem that the position of the plug cannot be accurately judged during deep well and ultra-deep well operations. The device includes a casing, a vibration component and a signal transmitting unit; the vibration component is arranged on the side wall of the casing; the vibration component includes a controller and a percussion hammer; the controller is electrically connected to the driving motor of the percussion hammer; when the controller receives the signal of the signal transmitting unit, it can start the driving motor to control the reciprocating motion of the percussion hammer. The signal transmitting unit is arranged in the cementing plug. After the cementing operation is completed, the cementing plug is put into the cementing plug to start the slurry replacement operation. During the falling process of the cementing plug, the controller receives the signal of the signal transmitting unit and controls the percussion hammer to vibrate. After the ground sensor receives the vibration sound wave, it can obtain the position of the plug, which provides a decision basis for on-site construction technicians to solve whether to continue construction when the displacement amount reaches the designed amount without collision pressure during cementing.

Description

Technical Field

[0001] The invention relates to the technical field of cementing oil and natural gas wells, and in particular to a knocking positioning centralizer. Background Art

[0002] During the drilling process, in order to reinforce the well wall, the casing is lowered and cement is filled in the wellbore and casing annulus. Cementing operations are characterized by being systematic, one-time and short-term. The main purpose of cementing is to protect and support the casing in the oil and gas well and to isolate the oil, gas and water formations.

[0003] Cementing plugs can be used to isolate cement slurry, clean casing walls, and prevent cement slurry pollution. After the plug collides with the float collar, it can accurately indicate the cement slurry replacement position and casing sealing performance.

[0004] In deep well cementing operations, because a lot of displacement fluid is needed, there is often no bump pressure during cementing due to metering problems, which results in premature termination of cementing, resulting in casing plugging and emptying, which affects the cementing quality. Bump pressure refers to when the upper rubber plug in the casing is pushed to the back pressure valve or bump pressure ring by the drilling fluid, the pump pressure will increase rapidly, so it is called "bump pressure". Bump pressure is an indispensable and important part of cementing operations, but in deep and ultra-deep well cementing operations, due to the large displacement volume and long casing, accidental damage may occur during the lowering process, resulting in the inability to accurately judge the position of the rubber plug, affecting the cementing quality.

[0005] Therefore, during cementing operations in deep and ultra-deep wells, an auxiliary means other than collision pressure is needed to determine the position of the rubber plug, so as to provide on-site construction technicians with a basis for deciding whether to continue construction when the displacement volume reaches the designed amount without collision pressure during cementing. Summary of the invention

[0006] The invention provides a knocking positioning centralizer to alleviate the problem that the position of the rubber plug cannot be accurately judged during deep well and ultra-deep well operations.

[0007] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0008] The present invention provides a percussion positioning centralizer, including a vibration assembly;

[0009] The vibration assembly is arranged on the side wall of the casing;

[0010] The vibration assembly includes a controller and a striking hammer;

[0011] The controller is electrically connected to the driving motor of the striking hammer;

[0012] When the controller receives the signal from the signal transmitting unit, it can start the driving motor to control the reciprocating motion of the striking hammer.

[0013] Furthermore,

[0014] Including the body;

[0015] The body is sleeved with the outer wall of the sleeve;

[0016] The body has a protrusion extending toward a side away from the sleeve;

[0017] The projection has a groove;

[0018] The vibration component is arranged in the groove.

[0019] Furthermore,

[0020] A protective plate is arranged on a side of the groove away from the vibration component.

[0021] Furthermore,

[0022] The protective plate is fixedly connected with the groove by screws.

[0023] Furthermore,

[0024] A sealing gasket is provided at the connection between the protective plate and the groove.

[0025] Furthermore,

[0026] At least one group of protrusions is arranged along the axis of the body.

[0027] Furthermore,

[0028] A vibration component is arranged in each groove.

[0029] Furthermore,

[0030] The signal transmitting unit comprises a rubber plug and a signal transmitter;

[0031] The signal transmitter is arranged inside the rubber plug.

[0032] Furthermore,

[0033] The vibration component has a standby state and a working state;

[0034] In the standby state, the rubber plug is away from the vibration component, and the controller does not receive the signal from the signal transmitter, so that the drive motor is in the standby state;

[0035] In the working state, the rubber plug is close to the vibration component, so that the controller receives the signal sent by the signal transmitter, and the controller controls the driving motor to work.

[0036] The beneficial effects of the present invention are analyzed as follows:

[0037] The signal transmitting unit is set in the cementing plug, and the vibration component is installed on the side wall of the casing and goes into the well along with the casing. After the cementing operation is completed, the cementing plug is put into the well to start the slurry replacement operation. When the cementing plug falls, it passes the vibration component (such as Figure 1 As shown in the figure), the controller receives the signal from the signal transmitting unit, starts the driving motor to control the reciprocating motion of the percussion hammer to generate vibration. After the sensor located on the ground receives the vibration sound waves emitted by the percussion hammer, it can obtain the position of the rubber plug, which provides a decision-making basis for on-site construction technicians on whether to continue construction when the displacement amount reaches the designed amount but there is no collision pressure during cementing, thereby improving the cementing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the relative positions of the signal transmitting unit and the body;

[0040] Figure 2 It is a schematic diagram of the structure of the main body;

[0041] Figure 3 is a schematic structural diagram of the protective plate 420;

[0042] Figure 4 It is a structural schematic diagram of a signal transmitting unit.

[0043] icon:

[0044] 100- casing;

[0045] 200-vibration component; 210-controller; 220-percussion hammer;

[0046] 300-signal transmitting unit; 310-rubber plug; 320-signal transmitter;

[0047] 400-main body; 410-bump; 420-protective plate. DETAILED DESCRIPTION

[0048] In deep and ultra-deep well cementing operations, due to the large displacement volume and long casing, accidental damage may occur during the lowering process, resulting in the inability to accurately determine the position of the rubber plug and whether to continue construction, thus affecting the cementing quality. Therefore, in deep and ultra-deep well cementing operations, a means of auxiliary judgment of the position of the rubber plug other than collision pressure is needed to provide on-site construction technicians with a decision-making basis for whether to continue construction when the displacement volume reaches the designed amount without collision pressure during cementing.

[0049] In view of this, if Figures 1 to 4 As shown, the present solution provides a knock positioning centralizer, including a vibration assembly 200;

[0050] The vibration assembly 200 is disposed on the side wall of the sleeve 100;

[0051] The vibration assembly 200 includes a controller 210 and a striking hammer 220;

[0052] The controller 210 is electrically connected to the driving motor of the striking hammer 220;

[0053] When the controller 210 receives the signal from the signal transmitting unit 300 , it can start the driving motor to control the reciprocating motion of the striking hammer 220 .

[0054] Specifically, the signal transmitting unit 300 is arranged in the cementing plug, and the vibration component 200 is installed on the side wall of the casing 100 and is lowered into the well along with the casing 100. After the cementing operation is completed, the cementing plug is put into the well to start the slurry replacement operation. When the cementing plug falls, it passes through the area of ​​the vibration component 200 (such as Figure 1 As shown in the figure, the controller 210 receives the signal from the signal transmitting unit 300, starts the driving motor to control the reciprocating motion of the percussion hammer 220 to generate vibration, and the sensor located on the ground receives the vibration sound waves emitted by the percussion hammer 220, so as to obtain the position of the rubber plug, which provides a decision basis for on-site construction technicians on whether to continue construction when the displacement amount reaches the designed amount but there is no collision pressure during cementing, thereby improving the cementing quality.

[0055] Regarding the shape and structure of the body 400, Figure 1 , Figure 2 and Figure 3 As shown:

[0056] The body 400 is sleeved with the outer wall of the sleeve 100;

[0057] The body 400 has a protrusion 410 extending toward a side away from the sleeve 100;

[0058] The bump 410 has a groove;

[0059] The vibration component 200 is disposed in the groove;

[0060] A protective plate 420 is provided on one side of the groove away from the vibration assembly 200;

[0061] The protective plate 420 is fixedly connected to the groove by screws;

[0062] A sealing gasket is provided at the connection between the protection plate 420 and the groove.

[0063] Specifically, the interior of the main body 400 is hollow and is sleeved with the sleeve 100, and the side wall of the main body 400 has multiple groups of through holes in an annular array, so that the main body 400 is connected and fixed to the sleeve 100 in a detachable manner; the protrusion 410 is arranged on the outer wall of the main body 400 in the form of a reinforcing rib along the conveying direction of the sleeve 100, and has sloped surfaces at both ends to prevent the main body 400 from being blocked and stuck during the process of following the sleeve 100 to be sent down.

[0064] Preferably, at least one set of protrusions 410 is disposed along the axis of the body 400;

[0065] A vibration assembly 200 is arranged in each groove. Arranging multiple sets of vibration assemblies 200 can effectively improve the accuracy of ground sensor data reception during ultra-deep well operations and improve the operation quality. When arranging multiple sets of vibration assemblies 200, the protrusions 410 are arranged on the side wall of the main body 400 in a circular array, and there is a certain gap between each protrusion 410 to facilitate the main body 400 to pass through the well section with mud and other debris when following the casing 100 to be sent down.

[0066] Regarding the shape and structure of the signal transmitting unit 300, Figure 1 and Figure 4 As shown:

[0067] The signal transmitting unit 300 includes a rubber stopper 310 and a signal transmitter 320;

[0068] The signal transmitter 320 is disposed inside the rubber stopper 310 .

[0069] Specifically, the signal transmitter 320 is fully wrapped by the rubber plug 310. When the signal transmitting unit 300 is lowered into the casing, the signal transmitter 320 continuously sends signals outward. The outer wall of the rubber plug 310 has a multi-layer corrugated structure, which makes it easy for the rubber plug 310 to enter the predetermined position and closely contact with the inner wall of the casing 100 to achieve sealing.

[0070] The working principle of this scheme is:

[0071] The vibration assembly 200 has a standby state and a working state;

[0072] In the standby state, the rubber stopper 310 is away from the vibration assembly 200, and the controller 210 does not receive a signal from the signal transmitter 320, so that the driving motor is in the standby state;

[0073] In the working state, the rubber stopper 310 is close to the vibration assembly 200, so that the controller 210 receives the signal sent by the signal transmitter 320, and the controller 210 controls the driving motor to work.

[0074] The vibration assembly 200 should be installed at the corresponding height of the casing 100 when the displacement amount reaches the designed amount according to the actual cementing needs. When the displacement amount reaches the designed amount, if the ground sensor detects the vibration signal emitted by the vibration assembly 200, it can assist in judging whether the rubber plug 310 has reached the predetermined position. When the displacement amount reaches the designed amount, if the ground sensor does not detect the vibration signal emitted by the vibration assembly 200, it can assist in judging whether the rubber plug 310 has not reached the predetermined position.

[0075] The beneficial effects of this program are analyzed as follows:

[0076] In order to solve the problem that the position of the plug may be difficult to determine during cementing operations in deep and ultra-deep wells, this solution designs a percussion positioning straightener. Through the cooperation of the vibration component 200 and the signal transmitting unit 300, this device generates vibration signals during the falling process of the cementing plug, and receives and analyzes these signals through ground sensors to accurately determine the position of the plug. This solution can effectively assist on-site construction technicians in making judgments, especially when the displacement volume reaches the design requirements but no collision pressure is generated, it can effectively determine whether to continue construction, significantly improving the accuracy and quality of cementing operations. Through the design of the main body 400 and the signal transmitting unit 300, the stability and reliability of the device in complex underground environments are ensured, bringing substantial technological progress and safety guarantees to cementing operations in deep and ultra-deep wells.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A knock positioning centralizer, characterized in that: including a vibration assembly (200); The vibration component (200) is arranged on the side wall of the sleeve (100); The vibration assembly (200) comprises a controller (210) and a striking hammer (220); The controller (210) is electrically connected to a driving motor of the striking hammer (220); When the controller (210) receives a signal from the signal transmitting unit (300), it can start the driving motor to control the striking hammer (220) to reciprocate; including body (400); The body (400) is sleeved with the outer wall of the sleeve (100); The body (400) has a protrusion (410) extending toward a side away from the sleeve (100); The protrusion (410) has a groove; The vibration component (200) is arranged in the groove; The signal transmitting unit (300) comprises a rubber stopper (310) and a signal transmitter (320); The signal transmitter (320) is arranged inside the rubber stopper (310); The vibration component (200) has a standby state and a working state; In the standby state, the rubber stopper (310) is away from the vibration component (200), and the controller (210) does not receive a signal from the signal transmitter (320), so that the drive motor is in the standby state; In the working state, the rubber stopper (310) is close to the vibration component (200), so that the controller (210) receives a signal sent by the signal transmitter (320), and the controller (210) controls the driving motor to work.

2. The knocking positioning centralizer according to claim 1, characterized in that: A protective plate (420) is provided on a side of the groove away from the vibration component (200).

3. The knocking positioning and centralizing device according to claim 2, characterized in that: The protection plate (420) is fixedly connected to the groove via screws.

4. The knocking positioning and centralizing device according to claim 3, characterized in that: A sealing gasket is provided at the connection between the protection plate (420) and the groove.

5. The knocking positioning and centralizing device according to claim 4, characterized in that: At least one set of protrusions (410) is arranged along the axis of the body (400).

6. The knocking positioning centralizer according to claim 5, characterized in that: A vibration component (200) is arranged in each of the grooves.

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