A closed isolation mud mechanism of a while-drilling wall strengthening device

Abstract

The application discloses a closed and isolated mud mechanism of a while-drilling well wall reinforcing device, which comprises a mud isolation mechanism, and the mud isolation mechanism is in close contact with the well wall through a rubber contact ring; a pushing mechanism is used for pushing the mud isolation mechanism out and pressing the mud isolation mechanism against the surface of the well wall; the mud isolation mechanism comprises an isolation body and the rubber contact ring; the isolation body is fixedly connected with a reaction cabin mechanism; the rubber contact ring is distributed at the front end of the isolation body and is in contact with the well wall during work; the pushing mechanism comprises a push rod, a base, a receiver, an antenna, a motor, a screw rod and a bolt; the push rod is fixedly connected with the reaction cabin mechanism and can move horizontally through the connection with the motor by the screw rod; the base is fixedly connected with a blocking mechanism; the receiver is fixedly connected with the antenna and the motor and forms a control network with an above-ground control chamber; the motor is fixedly connected with the base; and the mud isolation mechanism and the well wall are closely combined together through the pushing mechanism, so that the problem of separation of mixed liquid and mud during the solid wall operation is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drilling, drilling engineering and well wall protection, and particularly relates to a closed isolation mud mechanism of a while-drilling well wall strengthening device. BACKGROUND

[0002] The self-walking self-directional directional drilling technology has three major advantages: first, the drilling machine is cancelled. The bottom drive double drill bit replaces the rotary drive of the drilling machine, the while-drilling mud circulation replaces the ground mud pump circulation, and the near-bit drilling pressure adjustment system replaces the drilling machine hook control drilling pressure; second, the depth dependence on the drill pipe is eliminated. The armored cable pipe is used as the main transmission medium, which greatly reduces the tripping time and reduces the disturbance of the drilling tool to the well wall; third, the drilling system is self-walking and self-directional. It does not need to be pressurized by the ground to advance the drill bit.

[0003] Similar to conventional drilling, when the target of no-drill machine and no-drill pipe directional drilling is achieved, the well wall stability is also considered. First, the unstable or unstable area of the well wall needs to be known. For this purpose, the inventor proposes a "self-advancing while-drilling stratum rock morphology continuous recording device", patent number: CN201921263123.9, which realizes the recording of the well wall morphology while drilling and determines the unstable or unstable area of the well wall; second, the obtained unstable or unstable well wall area also needs to be reinforced, and there is no related solution and report at present, which belongs to the blank. Therefore, the while-drilling well wall strengthening device is invented. Since it is difficult to implement reinforcement operations on the unstable well wall area under the condition of mud circulation flow, a relatively closed space environment needs to be created to achieve the reinforcement purpose. Therefore, it is necessary to invent a closed isolation mud mechanism of a while-drilling well wall strengthening device. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art, and a closed isolation mud mechanism of a while-drilling well wall strengthening device is proposed.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme:

[0006] The present application provides a closed isolation mud mechanism of a while-drilling well wall strengthening device, comprising:

[0007] The mud isolation mechanism is in close contact with the well wall through the rubber contact ring;

[0008] The pushing mechanism is used to push out the mud isolation mechanism and press the mud isolation mechanism tightly against the surface of the well wall.

[0009] Further, the mud isolation mechanism comprises an isolation body and a rubber contact ring, the isolation body is fixedly connected with the reaction cabin mechanism, and the rubber contact ring is distributed at the front end of the isolation body and contacts the well wall during work.

[0010] Further, the pushing mechanism comprises a pushing rod, a base, a receiver, an antenna, a motor, a screw rod and bolts, the pushing rod is fixedly connected with the reaction chamber mechanism, is connected with the motor through the screw rod and can move horizontally, the base is fixedly connected with the blocking mechanism, the receiver is fixedly connected with the antenna and the motor, forms a control network with the ground control room, and the motor is fixedly connected with the base through the four bolts.

[0011] Compared with the prior art, the mud isolation mechanism has the following beneficial effects:

[0012] The mud isolation mechanism is combined with the well wall through the pushing mechanism, so that the problem of separation of the mixed liquid and the mud during the solid wall operation is solved, a relatively closed space environment is constructed by the isolation body and the rubber contact ring, compared with the traditional method, the torque self-balancing drilling system can be provided with more efficient, intelligent and environmentally-friendly well wall reinforcement means and equipment. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0014] Figure 1 is a perspective view of the mud isolation mechanism, the reaction chamber mechanism, the air bag chamber mechanism and the blocking mechanism after being connected.

[0015] Figure 2 is a front view of the mud isolation mechanism, the reaction chamber mechanism, the air bag chamber mechanism and the blocking mechanism after being connected.

[0016] Figure 3 is a partial perspective view of the air bag chamber mechanism and the pushing mechanism after being connected.

[0017] Figure 4 is a structural schematic view of the mud isolation mechanism.

[0018] Figure 5 is a structural schematic view of the pushing mechanism.

[0019] Figure 6 is a structural schematic view of the pushing mechanism Figure Two . DETAILED DESCRIPTION

[0020] In order to better understand the technical solutions, the method of the present application will be described in detail below with reference to the drawings.

[0021] Referring to the drawings, a closed isolation mud mechanism of a while-drilling well wall reinforcement device comprises a mud isolation mechanism 5 and a pushing mechanism 6, wherein:

[0022] The mud isolation mechanism 5 is in close contact with the well wall through the rubber contact ring 502, and comprises the isolation body 501 and the rubber contact ring 502, the isolation body 501 is fixedly connected with the reaction chamber mechanism 3, and the rubber contact ring 502 is distributed at the front end of the isolation body 501 and is in contact with the well wall during work;

[0023] The pushing mechanism 6 is used for pushing out the mud isolation mechanism 5 and pressing the mud isolation mechanism 5 against the well wall surface, and comprises the push rod 601, the base 602, the receiver 603, the antenna 604, the motor 605, the screw rod 606 and the bolt 607, the push rod 601 is fixedly connected with the reaction chamber, the push rod 601 is connected with the motor 605 through the screw rod 606, and the push rod 601 can move horizontally.

[0024] Specifically, the base 602 is fixedly connected with the blocking mechanism 8, the receiver 603 is fixedly connected with the antenna 604 and the motor 605, a control network is formed with the ground control room, and the motor 605 is fixedly connected with the base 602 through the four bolts 607.

[0025] Further, the number of the reaction mud isolation mechanisms 5 is four, which are symmetrically distributed in two layers, and the number of the pushing mechanisms 6 is eight, each two of which are connected with one reaction chamber mechanism 3.

[0026] Working principle and use process of the present application:

[0027] When the device reaches the damaged rock layer, the device hovers by means of the continuous recording device of the rock morphology of the stratum while drilling of the torque self-balancing drilling system, the antenna 604 of the pushing mechanism 6 receives the signal of the control room, the push rod 601 is driven by the motor 605 to push out the mud isolation mechanism 5 and the reaction chamber mechanism 3, the mud isolation mechanism 5 is pressed against the well wall surface, a large amount of gas is delivered to the reaction chamber mechanism 3 by the gas chamber mechanism 4, the mixed liquid is sprayed out of the reaction chamber mechanism 3 to the well wall, the mixed liquid is pushed to the surface of the damaged rock layer by means of the gas pressure, and the mixed liquid is uniformly coated on the well wall by the hanging brush 308; a relatively closed space environment is constructed by the isolation body 501 and the rubber contact ring 502 to achieve the purpose of reinforcement.

[0028] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A closed isolated mud mechanism of a while-drilling wall strengthening device, characterized in that, The mud isolation mechanism (5) is in close contact with the well wall through the rubber contact ring (502). The pushing mechanism (6) is used for pushing the mud isolation mechanism (5) out and pressing the mud isolation mechanism (5) against the well wall surface. The mud isolation mechanism (5) comprises the isolation body (501) and the rubber contact ring (502), the isolation body (501) is fixedly connected with the reaction chamber mechanism (3), and the rubber contact ring (502) is distributed at the front end of the isolation body (501) and is in contact with the well wall during work. The pushing mechanism (6) comprises the push rod (601), the base (602), the receiver (603), the antenna (604), the motor (605) and the screw rod (606), the push rod (601) is fixedly connected with the reaction chamber mechanism (3) and is connected with the motor (605) through the screw rod (606) and can move horizontally, the base (602) is fixedly connected with the blocking mechanism (8), the receiver (603) is fixedly connected with the antenna (604) and the motor (605) and constitutes a control network with the ground control room, and the motor (605) is fixedly connected with the base (602). The mixed liquid is sprayed out from the reaction chamber mechanism (3) to the well wall and is uniformly coated on the well wall by the hanging brush. ​

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