Well drilling and cementing throttler

Abstract

The utility model relates to the technical field of petroleum drilling and cementing equipment, in particular to a drilling and cementing throttler. The packer comprises an upper connecting part, a slip bowl, a sealing mounting mechanism, a rubber sleeve, a lower connecting part and a central pipe, the top of the lower connecting part is connected with the rubber sleeve, and the upper end of the rubber sleeve is connected with the upper connecting part through the sealing mounting mechanism; the center pipe penetrates through the upper connecting part and the rubber sleeve to be connected to the lower connecting part, and the center pipe pulls the lower connecting part to drive the rubber sleeve to move up and down to achieve throttling and pressure reduction. According to the sealing installation mechanism, the upper connecting part and the rubber sleeve are arranged in a sealing mode, the sealing performance between components is effectively improved through the cooperation of the installation ring and the sealing ring block with the sealing compressed spring and the sealing strip, the risk of fluid leakage is reduced, and therefore the working reliability and stability of the throttler are improved, and the service life of the throttler is prolonged. The throttling effect of the throttler is ensured, and the service life of the throttler is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum drilling cementing equipment technical field, concretely relates to a drilling cementing throttler. BACKGROUND

[0002] Downhole throttling technology is to place a certain specification throttler in the tubing at a certain depth in the well, to achieve throttling and pressure reduction in the wellbore, to convert pressure energy into kinetic energy, to improve fluid flow speed, to keep the throttled fluid in critical flow state all the time, to reduce the influence of wellhead pressure fluctuation on the well bottom, and to fully utilize geothermal energy to prevent the formation of hydrates.

[0003] The current drilling cementing throttler is mostly sealed and installed by directly extruding the sealing ring between the upper connecting part and the lower connecting part of the throttler. The sealing ring is prone to breakage after being extruded for many times, so that the sealing performance of the throttler cannot be guaranteed during use, which leads to faster replacement of the throttler and increases the maintenance cost.

[0004] In the process of petroleum drilling and cementing, the throttler plays a crucial role. It can control the flow rate and pressure of the fluid in the well, ensuring the safety and stability of drilling operations. However, the existing drilling and cementing throttler has some shortcomings. For example, the sealing performance between components is not ideal, which can easily lead to fluid leakage, affecting the throttling effect and the accuracy of well pressure control; it is not convenient and efficient during installation and operation, increasing the construction time and cost; it has poor adaptability to different working conditions, making it difficult to meet the needs of complex and variable drilling environments. UTILITY MODEL CONTENTS

[0005] The utility model aims to overcome the defects of the prior art and provide a drilling and cementing throttler with good sealing performance, convenient installation and operation method, and strong working condition adaptability. The throttler can effectively improve the efficiency and quality of drilling and cementing operations and reduce the construction risk.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a drilling and cementing throttler, which includes an upper connecting part, a slip seat, a sealing installation mechanism, a rubber tube, a lower connecting part, and a central pipe. The top of the lower connecting part is connected with the rubber tube, and the upper end of the rubber tube is connected with the upper connecting part through the sealing installation mechanism. The central pipe passes through the upper connecting part and the rubber tube and is connected to the lower connecting part. The central pipe pulls the lower connecting part to drive the rubber tube to move up and down, achieving throttling and pressure reduction.

[0007] The rubber tube is an integral structure composed of an upper ring and a lower frustum. The rubber tube has an inner cavity along the axial direction, which includes a first hole section, a second hole section, and a third hole section. The diameter of the inner cavity gradually increases from top to bottom. The central tube slides and seals the first hole section. The top of the lower connecting part penetrates the bottom surface of the rubber tube and extends upward to fit and connect to the third hole section of the inner cavity.

[0008] A support spring is provided inside the inner cavity of the rubber tube. The outer diameter of the support spring is adapted to the inner diameter of the second hole section of the inner cavity. The top end of the support spring is fixedly connected to the central tube, and the bottom end of the support spring is fixedly connected to the top end of the lower connecting part.

[0009] The top of the rubber tube is provided with an installation groove and a sealing groove. The inner wall of the installation groove is provided with internal threads. The sealing installation mechanism is threadedly connected to the installation groove to press and seal the installation groove.

[0010] A sealing spring is provided on the upper surface of the bottom end inside the sealing groove. A sealing strip is connected to the top of the sealing spring. The outer surface of the sealing strip slides in a sealing fit with the inner wall of the sealing groove. The sealing spring is symmetrically distributed in a ring shape about the inner wall of the bottom end of the sealing groove.

[0011] The sealing installation mechanism includes an installation ring block, an installation ring, and a sealing ring block; the installation ring block is fixedly installed at the bottom of the upper connecting part; the installation ring block is an annular body with a hole along the axial direction, and the central tube passes through the hole; the sealing ring block is an annular body coaxially arranged on the lower surface of the installation ring block, and the cross-sectional shape of the sealing ring block matches the sealing groove; an installation ring is provided on the outer periphery of the sealing ring block, and the outer surface of the sealing ring block does not contact the inner wall of the installation ring; the outer surface of the installation ring is provided with an external thread, and the installation ring is threadedly connected to the installation groove to press the sealing ring block firmly onto the sealing strip (607) in the sealing groove.

[0012] The rubber sleeve is made of a composite material with a metal skeleton.

[0013] The sealing strip is made of polyurethane.

[0014] The sealing ring block is made of stainless steel.

[0015] The central tube is fixedly connected to the upper connecting part. Beneficial effects

[0016] 1. The sealing installation mechanism of this utility model provides a sealing setting between the upper connecting part and the rubber sleeve. Through the cooperation of the installation ring and sealing ring block with the sealing spring and sealing strip, the sealing performance between the components is effectively improved, the risk of fluid leakage is reduced, thereby improving the working reliability and stability of the throttle, ensuring the throttling effect of the throttle, and extending its service life.

[0017] 2. This utility model adopts the coordinated work of the clamp seat and the central tube, making the installation and operation of the throttle more convenient and efficient; the installation can be completed by simply connecting the delivery tool, lowering and hanging it on the wall, saving construction time and labor costs.

[0018] 3. The structural design of this utility model can adapt to various drilling conditions, such as different tubing sizes and well pressure environments; its sealing performance stability and ease of installation and operation have significant advantages in complex and ever-changing drilling operations, improving the efficiency and quality of the entire drilling and cementing project, and reducing construction risks caused by choke failure or inconvenient installation.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Fig. 2 This is an exploded structural diagram of the sealing installation mechanism of this utility model;

[0023] Fig. 3 This is a cross-sectional structural diagram of the throttling device of this utility model.

[0024] In the diagram: 1. Upper connecting part; 2. Lower connecting part; 3. Slip seat; 4. Central tube; 5. Rubber sleeve; 6. Sealing installation mechanism; 601. Mounting ring block; 602. Mounting groove; 603. Sealing groove; 604. Mounting ring; 605. Sealing ring block; 606. Sealing spring; 607. Sealing strip; 7. Inner cavity; 701. Support spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0026] according to Figs. 1-3 The drilling cementing throttling device shown includes an upper connecting part 1, a slip seat 3, a sealing installation mechanism 6, a rubber sleeve 5, a lower connecting part 2, and a central tube 4. The rubber sleeve 5 is connected to the top of the lower connecting part 2, and the upper end of the rubber sleeve 5 is connected to the upper connecting part 1 through the sealing installation mechanism 6. The central tube 4 passes through the upper connecting part 1 and the rubber sleeve 5 and connects to the lower connecting part 2. The central tube 4 pulls the lower connecting part 2, causing the rubber sleeve 5 to move up and down, thereby achieving throttling and pressure reduction. The central tube 4 drives the lower connecting part 2 to move up and down within the rubber sleeve 5, achieving throttling and pressure reduction. Through the sealing design between the upper connecting part 1 and the rubber sleeve 5, good sealing performance can be maintained even under high pressure or vibration environments, effectively preventing fluid leakage through the gap between the rubber sleeve 5 and the upper connecting part 1, and ensuring the throttling effect of the throttling device.

[0027] Furthermore, such as Fig. 3 As shown, the rubber sleeve 5 is an integral structure composed of an upper annular section and a lower frustum. The rubber sleeve 5 has an inner cavity 7 along its axial direction, which includes a first segment, a second segment, and a third segment. The diameter of the inner cavity 7 gradually increases from top to bottom. The central tube 4 slides and seals vertically in the first segment. The top end of the lower connecting part 2 penetrates the bottom surface of the rubber sleeve 5 and extends upwards to fit into the third segment of the inner cavity 7. In this embodiment, the lower connecting part 2 is an integral structure consisting of four segments from top to bottom: the first segment is a cylindrical segment, the second segment is a frustum segment with a smaller top and a larger bottom, the third segment is a cylindrical segment, and the fourth segment is a frustum segment with a larger top and a smaller bottom. The outer diameter of the first cylindrical segment is smaller than the outer diameter of the third cylindrical segment, and the outer diameter of the first cylindrical segment matches the inner diameter of the third segment of the inner cavity 7. The shape of the lower connecting part 2 is not unique, as long as the diameter of the upper part intersecting the rubber sleeve 5 is smaller than the diameter of the lower part.

[0028] Furthermore, such as Fig. 3 As shown, a support spring 701 is provided in the inner cavity 7 of the rubber tube 5. The outer diameter of the support spring 701 is adapted to the inner diameter of the second hole section of the inner cavity 7. The top end of the support spring 701 is fixedly connected to the central tube 4, and the bottom end of the support spring 701 is fixedly connected to the top end of the lower connecting part 2.

[0029] The central tube 4 compresses the support spring 701, and the support spring 701 generates an elastic force that pulls the lower connecting part 2, causing the rubber sleeve 5 to move up and down, facilitating subsequent throttling operations. In the specific working process, a special tool applies force to the support spring 701 through the central tube 4, achieving the compression and release of the support spring 701. The compression of the support spring 701 causes the rubber sleeve 5 to contract, keeping it away from the inner wall of the oil pipe. The release of the support spring 701 causes the rubber sleeve 5 to expand, ensuring that the outer bottom surface of the rubber sleeve 5 is tightly pressed against the inner wall of the oil pipe, preventing fluid from flowing outwards through the outer wall of the rubber sleeve 5. The fluid enters the throttle device through the throttling orifice of the air nozzle structure and flows upwards along the internal pipeline of the throttle device.

[0030] Furthermore, such as Fig. 2 As shown, the top of the rubber tube 5 is provided with an installation groove 602 and a sealing groove 603. The inner wall of the installation groove 602 is provided with an internal thread. The sealing installation mechanism 6 is threadedly connected to the installation groove 602 to press and seal the installation groove 603.

[0031] Furthermore, a sealing spring 606 is provided on the upper surface of the bottom end inside the sealing groove 603. A sealing strip 607 is connected to the top of the sealing spring 606. The outer surface of the sealing strip 607 slides in a sealing fit with the inner wall of the sealing groove 603. The sealing spring 606 is symmetrically distributed in a ring shape about the inner wall of the bottom end of the sealing groove 603. The sealing spring 606 supports the sealing strip 607, reduces the compressive contact force applied by the sealing ring block 605 to the sealing strip 607, ensures the sealing effect of the sealing strip 607, and thus achieves a good sealing installation between the upper connecting part 1 and the lower connecting part 2.

[0032] Furthermore, such as Fig. 2As shown, the sealing installation mechanism 6 includes a mounting ring block 601, a mounting ring 604, and a sealing ring block 605; the mounting ring block 601 is fixedly installed at the bottom of the upper connecting part 1; the outer surface of the mounting ring block 601 is provided with a friction layer, which can play a certain role in anti-slip and auxiliary positioning during installation; the mounting ring block 601 is an annular body with a hole along the axial direction, and the central tube 4 passes through the hole; the sealing ring block 605 is an annular body coaxially arranged on the lower surface of the mounting ring block 601, and the cross-sectional shape of the sealing ring block 605 matches the sealing groove 603; on the outer periphery of the sealing ring block 605... An mounting ring 604 is provided on the upper part, and the outer surface of the sealing ring block 605 does not contact the inner wall of the mounting ring 604. The outer surface of the mounting ring 604 is provided with an external thread, and the inner wall of the mounting groove 602 is provided with an internal thread that engages with the external thread of 604. The mounting ring block 601 and the mounting groove 602 are fixedly installed through the cooperation of the internal and external threads. Under the action of this connection structure, the mounting ring block 601 causes the sealing ring block 605 to move downward and gradually come into contact with the sealing groove 603. Under the action of the support spring 701, the sealing ring block 605 and the sealing strip 607 form a sealing compression contact.

[0033] Furthermore, the rubber sleeve 5 is made of a metal-framed composite material. Using a metal-framed composite material for the rubber sleeve 5 improves its mechanical strength and durability while maintaining good elasticity, making it suitable for applications requiring higher strength and stability.

[0034] The sealing strip 607 is made of polyurethane, which has good sealing performance, wear resistance, strong extrusion resistance, good oil resistance, and long service life.

[0035] The sealing ring block 605 is made of stainless steel, which has a long sealing life and is corrosion resistant.

[0036] The working process of this utility model:

[0037] 1. When using the throttle, first connect the feeding tool through the slip seat 3, and ensure that the set screw of the feeding tool is in contact with the top of the center tube 4.

[0038] 2. Then, using a winch to connect the steel wire, the throttle is lowered to the predetermined position. Under the friction between the slip seat 3 and the inner wall of the oil pipe, the throttle hangs on the inner wall of the oil pipe.

[0039] 3. Installation of the throttle: The mounting ring block 601 screws the mounting ring 604 into the mounting groove 602 for fixation. At the same time, the sealing ring block 605 contacts and compresses the sealing strip 607. The sealing strip 607 drives the sealing spring 606 to contract. The elastic force generated by the contraction of the sealing spring 606 ensures that a sealing contact is formed between the sealing strip 607 and the sealing ring block 605, realizing the sealing installation between the upper connecting part 1 and the lower connecting part 2. After that, the throttle operation can be carried out.

[0040] 4. (1) Deployment: Connect the delivery tool and the throttle with a pin. The jack screw of the delivery tool pushes the central tube of the throttle to apply pre-pressure to the spring, causing the rubber tube to contract, which facilitates the throttle entering the inner wall of the oil pipe. Then connect the shocker, weight rod, and wire rope cap in sequence. Lower the throttle to the predetermined position by connecting the wire with a winch; (2) Sealing: After the throttle is lowered to the predetermined position, slowly lift the wire. The slip seat sits on the inner wall of the oil pipe due to friction. Repeatedly lift and lower the wire. The shocker vibrates upward, cuts the pin, and the spring releases energy, pushing the rubber tube seat upward. The rubber tube is opened and forms a tight contact with the inner wall of the oil pipe, achieving a seal. This sealing mechanism can prevent the fluid from bypassing the throttle and ensure the throttling effect; (3) Retrieval: By vibrating downward, the central tube is pushed downward, compressing the spring downward. The rubber tube moves downward and is retrieved. Continue to vibrate downward, and the slip is retrieved.

[0041] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0044] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A drilling cementing choke, characterized in that: It includes an upper connecting part (1), a slip seat (3), a sealing installation mechanism (6), a rubber tube (5), a lower connecting part (2), and a central tube (4). The top of the lower connecting part (2) is connected to the rubber tube (5), and the upper end of the rubber tube (5) is connected to the upper connecting part (1) through the sealing installation mechanism (6). The central tube (4) passes through the upper connecting part (1) and the rubber tube (5) and connects to the lower connecting part (2). The central tube (4) pulls the lower connecting part (2) to drive the rubber tube (5) to move up and down to achieve throttling and pressure reduction.

2. The drilling cementing choke as described in claim 1, characterized in that: The rubber tube (5) is an integral structure composed of an upper ring and a lower frustum. The rubber tube (5) has an inner cavity (7) along the axial direction. The inner cavity (7) includes a first hole section, a second hole section and a third hole section. The diameter of the inner cavity (7) gradually increases from top to bottom. The central tube (4) slides in a sealed manner in the first hole section. The top end of the lower connecting part (2) penetrates the bottom surface of the rubber tube (5) and extends upward to fit and connect to the third hole section of the inner cavity (7).

3. A drilling cementing choke as described in claim 2, characterized in that: A support spring (701) is provided in the inner cavity (7) of the rubber tube (5). The outer diameter of the support spring (701) is adapted to the inner diameter of the second hole section of the inner cavity (7). The top end of the support spring (701) is fixedly connected to the central tube (4), and the bottom end of the support spring (701) is fixedly connected to the top end of the lower connecting part (2).

4. A drilling cementing choke as described in claim 3, characterized in that: The top of the rubber tube (5) is provided with an installation groove (602) and a sealing groove (603). The inner wall of the installation groove (602) is provided with an internal thread. The sealing installation mechanism (6) is threadedly connected to the installation groove (602) to press and seal the installation groove (603).

5. A drilling cementing choke as described in claim 4, characterized in that: A sealing spring (606) is provided on the upper surface of the bottom end inside the sealing groove (603). A sealing strip (607) is connected to the top of the sealing spring (606). The outer surface of the sealing strip (607) slides in a sealing fit with the inner wall of the sealing groove (603). The sealing spring (606) is symmetrically distributed in a ring shape about the inner wall of the bottom end of the sealing groove (603).

6. A drilling cementing choke as described in claim 4, characterized in that: The sealing installation mechanism (6) includes an installation ring block (601), an installation ring (604), and a sealing ring block (605); the installation ring block (601) is fixedly installed at the bottom of the upper connecting part (1); the installation ring block (601) is an annular body with a hole along the axial direction, and the central tube (4) passes through the hole; the sealing ring block (605) is an annular body coaxially arranged on the lower surface of the installation ring block (601), and the cross-sectional shape of the sealing ring block (605) matches the sealing groove (603); an installation ring (604) is provided on the outer periphery of the sealing ring block (605), and the outer surface of the sealing ring block (605) does not contact the inner wall of the installation ring (604); the outer surface of the installation ring (604) is provided with an external thread, and the installation ring (604) is threadedly connected to the installation groove (602) to press the sealing ring block (605) onto the sealing strip (607) in the sealing groove (603).

7. A drilling cementing choke as described in any one of claims 1 to 6, characterized in that: The rubber sleeve (5) is made of a metal skeleton composite material.

8. A drilling cementing choke as described in claim 5, characterized in that: The sealing strip (607) is made of polyurethane.

9. A drilling cementing choke as described in claim 6, characterized in that: The sealing ring block (605) is made of stainless steel.

10. A drilling cementing choke as described in claim 1, characterized in that: The central tube (4) is fixedly connected to the upper connecting part (1).

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