A downhole casing remote controlled grouting device

Abstract

The utility model discloses a lower casing remote control grouting device relates to oil and gas drilling technical field. The device includes 380V remote control switch, explosion -proof terminal box, 15KW drilling fluid perfusion pump and grouting pipeline. Remote control switch contains handheld remote controller and receiving controller, and operating personnel can remote control perfusion pump's start -stop on the drilling platform surface. Receiving controller installs in the explosion -proof terminal box of protection level IP67, and the explosion -proof level is Ex d IIC T4 Gb. The grouting pipeline export end is connected with the soft rubber tube, can insert the casing water eye. The utility model solves the problem that the existing grouting technology needs to interrupt operation, and the efficiency is low, and there is the hidden danger of safety, realizes the continuous, remote, safe grouting in the process of lower casing, has improved the operation efficiency, has reduced the downhole accident risk.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling technology, and in particular to a remote-controlled grouting device for casing installation. Background Technology

[0002] In oil drilling, casing installation is a critical and high-risk step. During this process, timely grouting of the casing string is essential to prevent damage to the casing float shoes and collars due to excessive pressure differentials between the inside and outside of the string. It also minimizes the time the casing remains stationary in the open hole section, preventing sticking and jamming.

[0003] Currently, there are three main grouting methods in the industry: The first is for the on-site worker to manually start and stop the grouting pump at the grouting tank. This method requires interrupting the casing installation, which is inefficient and can easily lead to uneven grouting or stuck drill bit. The second is to use a drilling pump for top drive grouting. The large displacement makes it easy to suck in sediment and clog the float ring, and it also requires stopping the operation. The third is to use an automatic casing grouting device. This device is complicated to operate, the sealing parts are easily worn, and there is a risk of rubber detachment clogging the casing and personnel working at height.

[0004] Therefore, existing technologies generally suffer from problems such as long grouting time, low operational efficiency, high labor intensity, and numerous safety hazards. There is an urgent need for a new type of device capable of continuous, remote, and safe grouting. Summary of the Invention

[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a remote-controlled grouting device for lower casing, so as to solve the problems of operation interruption, low efficiency and safety hazards during lower casing grouting.

[0006] The technical solution of this utility model is as follows: A remote-controlled grouting device for casing installation includes a 380V remote control switch, an explosion-proof junction box, a 15KW drilling fluid injection pump, and a grouting pipeline. The remote control switch includes a remote controller (transmitter) and a receiver controller (receiver and actuator). The receiver controller is installed inside the explosion-proof junction box, meeting the explosion-proof requirements of the drilling site. Operators can remotely control the start and stop of the drilling fluid injection pump using a handheld remote control on the drilling platform. The grouting pipeline extends from the pump outlet to the drilling platform, with a section of flexible tubing connected to its end for easy insertion into the casing water hole for grouting.

[0007] Preferably, the 380V remote control switch receiver controller (receiver and execution end) has dimensions of 230mm*128mm*70mm, an operating voltage of three-phase 380V, an operating temperature of -20~50℃, a rated power of 30KW, a signal distance of 100-5000m, an external antenna, and simple wiring.

[0008] Preferably, the 380V remote control switch remote controller (transmitter) has dimensions of 120mm*40mm*10mm and a rated voltage of 12V. It is a small handheld device with buttons such as "on", "off", and "stop". When a button is pressed, it sends encrypted control commands to the receiver controller (receiver and execution end) via RF radio frequency signals.

[0009] Preferably, the explosion-proof junction box has dimensions of 300mm*180mm*120mm to prevent potential electrical sparks or high temperatures generated inside from igniting flammable and explosive gases, vapors, or dust in the surrounding environment, thereby avoiding explosion accidents. It has an explosion-proof rating of Ex dIIC T4 Gb, an enclosure protection rating of IP67, and is made of 316 stainless steel, meeting the explosion-proof requirements for oil drilling sites.

[0010] Preferably, the 15KW drilling fluid injection pump has its terminals connected to the output of the receiving controller, its suction end connected to the drilling fluid grouting tank, and its outlet end connected to the grouting pipeline, with a discharge capacity of 50-100m³. 3 / h, head about 20-50m, outlet pressure about 0.2-0.5MPa.

[0011] Preferably, the middle part of the grouting pipeline is a 2-inch hollow rigid pipeline, and both ends are 3-4m 2-inch soft rubber hoses, which facilitates the connection of the grouting pump and wellhead operation.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] 1. Safe and efficient: The drilling platform can be remotely controlled by personnel, eliminating the need to travel back and forth to the grouting tank. This avoids the risks of direct contact with electrical equipment and working in harsh environments, and also eliminates the possibility of over- or under-grouting due to poor communication.

[0014] 2. Continuous operation: Grouting can be carried out during the intervals between operations such as lifting the casing and unloading the protective wire, without the need for dedicated grouting time. This achieves continuity in casing lowering operations, greatly improves efficiency, and significantly reduces the risk of stuck drill due to casing stationary conditions.

[0015] 3. Reasonable discharge capacity: A dedicated 15KW injection pump is used, with a moderate discharge capacity, which can effectively prevent drilling fluid from spraying out of the wellhead, ensuring a clean working environment and personnel safety.

[0016] 4. Simple and reliable structure: The device has a simple structure, is easy to process, has low cost, is easy to install and reuse on site, and has broad application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the system structure of this utility model.

[0018] In the diagram: 1. Explosion-proof junction box; 2. 15KW drilling fluid injection pump; 3. Grouting pipeline; 4. Flexible hose; 5. Receiver controller; 6. Remote control.

[0019] Figure 2 This is a wiring diagram of the remote control device of this utility model. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto. These embodiments are only used to more fully describe the preferred aspects of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] Example 1: Basic Configuration Example

[0022] This embodiment provides a basic configuration of a casing remote-controlled grouting device. The device includes a 380V remote control switch, an explosion-proof junction box (1), a 15KW drilling fluid injection pump (2), and a grouting pipeline (3).

[0023] Remote control switch: Its receiver controller (5) measures 230mm×128mm×70mm, operates at three-phase 380V, has a rated control power of 30KW, a signal receiving distance of not less than 100 meters, and is equipped with an external antenna. The receiver controller (5) is fixedly installed inside an explosion-proof junction box (1). The remote control (6) is handheld, measures 120mm×40mm×10mm, is powered by a 12V battery, and has three physical buttons on its surface: "On", "Off", and "Stop". It communicates with the receiver controller (5) via RF radio frequency signals in encrypted form.

[0024] Explosion-proof junction box (1): The dimensions are 300mm×180mm×120mm. It is made of 316 stainless steel and its explosion-proof rating is Ex d IIC T4 Gb. The enclosure protection rating is IP67, ensuring safe use in flammable, explosive and humid environments on drilling platforms.

[0025] Drilling fluid injection pump (2): 15KW power, its power input is connected to the output of the receiving controller (5). The pump's suction end is connected to the drilling fluid injection tank via a pipeline, and its outlet end is connected to the injection pipeline (3). The pump's rated displacement is 60m³ / h. 3 The pump has a flow rate of 30 meters per hour and an outlet pressure of approximately 0.3 MPa.

[0026] Grouting pipeline (3): The main body is a 2-inch steel rigid pipe that extends from the pump outlet to the drilling platform. At the operating end of the drilling platform, a 3.5-meter-long 2-inch oil-resistant and wear-resistant soft rubber hose (4) is connected to facilitate the flexible movement of the operator and alignment with the casing water hole.

[0027] Work Process: During casing installation, after the casing is lowered to the drilling platform, the operator uses the gap created by the top drive lifting a casing from the rat hole to insert the flexible hose (4) into the water hole of the casing string already in the well. Then, the operator presses the "on" button on the handheld remote control (6). The receiver controller (5) starts the 15KW drilling fluid injection pump (2), and the drilling fluid is pumped into the casing. The operator observes the wellhead and, when the drilling fluid level is close to the wellhead, presses the "stop" button to shut off the pump. The entire process does not require notifying the station operator at the circulation tank, nor does it require stopping the casing installation.

[0028] Example 2: Large Displacement and Enhanced Communication Example

[0029] This embodiment is optimized based on Embodiment 1 for well conditions requiring faster grouting speed.

[0030] The device structure in this embodiment is the same as that in Embodiment 1, but the parameters of key components are different:

[0031] Drilling fluid injection pump (2): A higher performance 15KW pump was selected, with its displacement increased to 90m³ / h. 3 The pump has a flow rate of 1000 m / h, a head of 45 m, and an outlet pressure of approximately 0.45 MPa to accommodate larger casing volumes.

[0032] Remote control switch: A model with a longer communication distance was selected. The stable communication distance between the remote controller (6) and the receiver controller (5) in open areas can reach 2000 meters, which is suitable for large drilling platforms or complex site layouts with higher requirements for signal penetration. The rated control power of the receiver controller (5) is still 30KW, leaving sufficient margin.

[0033] Explosion-proof junction box (1): Based on the IP67 protection level, an anti-vibration bracket can be selected to better adapt to the strong vibration environment that may exist around the drilling platform.

[0034] Operating Procedure: Similar to Example 1. Due to the larger pump displacement, the grouting time for a single casing is significantly shortened, further reducing operation time, making it particularly suitable for running large-diameter casing. Enhanced communication capabilities ensure that the control signal between the drilling rig and the pump house remains stable and reliable, even on large offshore platforms or in land-based well sites with complex terrain.

[0035] Example 3: Parallel Operation of Multiple Pumps and Safety Redundancy Example

[0036] This embodiment is designed for special operational scenarios that require a large amount of grouting, such as ultra-deep wells and large-diameter casings.

[0037] The core of the device in this embodiment lies in the use of parallel pump sets and redundant control design.

[0038] Pumping system: The system includes two 15KW drilling fluid injection pumps (2A, 2B). The suction ends of the two pumps are connected to the grouting tank, and the outlet ends are connected in parallel to the same grouting pipeline (3).

[0039] Control system: The remote control switch system has dual-channel control function. The receiver controller (5) has two independent output circuits, which can control two injection pumps respectively. The remote controller (6) is equipped with "Pump 1 On / Off", "Pump 2 On / Off" and "All Stop" buttons.

[0040] Normal mode: In the early stages of operation or when the grouting volume requirement is not large, the operator can start only one pump (such as 2A) for grouting.

[0041] High-speed mode: When rapid grouting is required (as with enlarged diameter casing as shown below), the operator can sequentially start two pumps to double the discharge capacity (theoretically up to 150-180m³). 3 / h), which greatly improves grouting efficiency.

[0042] Redundancy mode: If one of the pumps (such as 2A) fails, the operator can immediately shut it down and start another standby pump (2B) to continue the grouting operation, avoiding the interruption of the entire casing operation due to a single pump failure and providing important operational safety assurance.

[0043] Working process: Based on the downhole conditions and work instructions, the operator can flexibly select to activate either single-pump or dual-pump mode via remote control (6). After inserting the soft rubber hose (4) at the end of the grouting pipeline (3) into the casing, the preset pump set can be remotely started. After grouting is completed, the pumps are shut down. This design greatly improves the reliability of the entire grouting system and its ability to cope with complex working conditions.

[0044] The above technical features constitute the embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A remote-controlled grouting device for lower casing, characterized in that: The system includes a 380V remote control switch, an explosion-proof junction box (1), a 15KW drilling fluid injection pump (2), and a grouting pipeline (3). The 380V remote control switch includes a remote controller (6) and a receiver controller (5). The receiver controller (5) is fixedly installed inside the explosion-proof junction box (1) and is used to receive the wireless signal emitted by the remote controller (6) and control the power supply of the 15KW drilling fluid injection pump (2). The suction end of the 15KW drilling fluid injection pump (2) is connected to the drilling fluid grouting tank, and its outlet end is connected to the starting end of the grouting pipeline (3). The end of the grouting pipeline (3) extends to the drilling platform and is connected to a section of soft rubber hose (4).

2. The remote-controlled grouting device for lower casing according to claim 1, characterized in that: The explosion-proof junction box (1) has an explosion-proof rating of not less than ExdIICT4Gb, an enclosure protection rating of not less than IP67, and is made of 316 stainless steel.

3. The remote-controlled grouting device for lower casing according to claim 1, characterized in that: The remote control (6) is a handheld device that communicates with the receiver controller (5) via RF radio frequency signals. Its surface is equipped with "on", "off" and "stop" control buttons.

4. The remote-controlled grouting device for lower casing according to claim 1, characterized in that: The operating voltage of the receiver controller (5) is three-phase 380V, and the rated control power is not less than 30KW.

5. The remote-controlled grouting device for lower casing according to claim 1, characterized in that: The displacement of the 15KW drilling fluid injection pump (2) is 50-100m³. 3 / h, with a head of 20-50 meters and an outlet pressure of 0.2-0.5MPa.

6. The remote-controlled grouting device for lower casing according to claim 1, characterized in that: The main body of the grouting pipeline (3) is a hollow rigid pipeline, and the end of the soft rubber tube (4) is 3 to 4 meters long and has an inner diameter of 2 inches.

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