Compound control type layered oil production tool and operation method thereof
By introducing steel wire measurement and adjustment into offshore oilfield stratified production tools, a backup method is provided, which solves the problem of oil production failure caused by cable damage or electronic control failure, realizes reliable stratified oil production and data monitoring, and reduces production costs.
Patent Information
- Application Number
- CN202510867011.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-09-05
AI Technical Summary
During the stratified oil production process in offshore oil fields, there are risks in the cable running operation. Once the cable connection is damaged or the downhole electronic control measurement and adjustment tool fails, the entire production string loses its function and stratified adjustment cannot be carried out, resulting in oil production failure and increased operating costs.
On the basis of existing cable measurement and adjustment, steel wire measurement and adjustment is added, and a backup means is provided through composite cable-controlled production tools and measurement and adjustment instruments to ensure that oil production channel adjustment and data collection can still be carried out when the electric control fails, thereby improving the reliability and long-term effectiveness of the tool.
It improves the reliability and measurement and adjustment reliability of the production pipe string, extends its service life, reduces oil field production costs, and ensures the ability to produce oil in separate layers in the event of electronic control failure.
Smart Images
Figure CN120592597A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of oil and gas field development, and in particular to a composite controlled layered oil production tool and an operating method thereof. Background Art
[0002] The intelligent cable measurement and adjustment technology for offshore oil fields effectively solves the problem of stratified oil production and allocation, and provides a process basis and implementation means for fine oil production in offshore oil fields.
[0003] However, there are certain operational risks in cable running operations. Once the connection of the cable into the well is damaged or the downhole electronic control measurement and adjustment tool fails, the entire oil production string will lose its function, and it will be impossible to adjust the oil production channel and collect downhole information. If you want to carry out stratified adjustment, you need to pull out the drill and replace the tool and run it again, which will seriously affect oil production and increase operating costs.
[0004] Therefore, a composite controlled stratified oil production tool and its operation method are urgently needed to solve the above technical problems. Summary of the Invention
[0005] The present invention aims to provide a composite controlled stratified oil production tool and its operating method. This tool, which incorporates wireline control and adjustment in addition to existing cable-based control, addresses the reliability shortcoming of existing tools, including their lack of a backup mechanism. This improves the reliability of the tubing string, extends its effective operation time, and supports long-term, precise oilfield production. The various technical benefits achieved by the preferred technical solution among the various technical solutions provided by this invention are detailed below.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] The present invention provides a composite controlled stratified oil production tool, comprising an oil production string, a controller and a control cable. A composite cable-controlled stratified oil production tool and an interlayer isolation tool are arranged in the oil production string, wherein:
[0008] The interlayer isolation tool and the composite cable-controlled production tool are arranged at intervals. The composite cable-controlled production tool includes a main body, and the main body is provided with an oil production channel, a first connecting structure and a second connecting structure. The first connecting structure can be connected to the controller through the control cable to adjust the opening of the oil production channel. The second connecting structure can be connected to a measuring and adjusting instrument, and the measuring and adjusting instrument is connected to the controller to adjust the opening of the oil production channel.
[0009] Preferably, the measuring and adjusting instrument and a steel cable are further included, and the measuring and adjusting instrument is connected to the controller via the steel cable.
[0010] Preferably, it further comprises a steel cable winch, the steel cable is wound on the steel cable winch, and the steel cable winch is arranged between the measuring and adjusting instrument and the controller.
[0011] Preferably, the measuring and adjusting instrument includes a torque motor.
[0012] Preferably, the production tubing string includes a casing and a tubing hanger, wherein:
[0013] The casing is connected to the tubing hanger;
[0014] The composite cable-controlled mining tool and the interlayer isolation tool are arranged in the casing.
[0015] Preferably, a bifurcated joint and a downhole electric pump are further provided in the casing, wherein:
[0016] The bifurcated joint is connected to the oil pipe hanger;
[0017] The downhole electric pump is connected to the bifurcated joint and is used to lift the downhole liquid to the surface;
[0018] The composite cable-controlled mining tool is connected to the bifurcation joint.
[0019] Preferably, a sealing structure is further included, and a cable insertion sealing structure is provided on each layer of the interlayer isolation tool.
[0020] Preferably, a monitoring component is further provided on the main body, and the monitoring component is communicatively connected with the controller for monitoring the pressure, temperature, flow rate and water content downhole.
[0021] An operating method of the above-mentioned composite controlled stratified oil production tool comprises the following steps:
[0022] The composite cable-controlled production tool and the interlayer isolation tool are sequentially lowered along the production string into the well;
[0023] The control cable connects the composite cable-controlled production tools of each layer, passes through the isolation tools between each layer, and is lowered into the well along with the production string. After passing through the last isolation tool between layers, it is connected to the controller.
[0024] After being lowered into place, the isolation tools between the layers are sealed, and the controller is used to control the composite cable-controlled production tools to adjust the oil production channels of each layer and carry out stratified oil production.
[0025] Preferably, if the electric control function of the composite cable-controlled production tool fails and needs to be measured and adjusted, a measuring and adjusting instrument is connected via a steel cable and lowered into the second connection structure of the composite cable-controlled production tool, and the oil production channels of each layer are adjusted by the measuring and adjusting instrument.
[0026] The present invention provides a composite controlled stratified oil production tool and an operating method thereof. A composite cable-controlled stratified oil production tool is provided, which can be connected to a controller and a measuring and adjusting instrument through a control cable. A conventional cable-controlled stratified oil production string is used as a permanent downhole string, and the downhole electric-controlled stratified oil production tool is optimized to form a composite cable-controlled stratified oil production tool. The oil production channel can be adjusted by the measuring and adjusting instrument. When the electric control of the downhole composite controlled stratified oil production tool fails, a backup means for adjusting the oil production channel is provided, thereby improving the reliability and long-term effectiveness of the overall tool. Compared with conventional permanent cable stratified oil production, a backup measuring and adjusting means for the measuring and adjusting instrument is provided. The measuring and adjusting mode of the measuring and adjusting instrument is a post-entry operation mode, which can ensure that the measuring and adjusting instrument is intact, solves the problem that the stratified oil production cannot be measured and adjusted after the downhole electric-controlled tool fails, improves the measurement and adjustment reliability of the overall oil production string, extends the service life of the string, and effectively reduces the production cost of the oil field. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 This is a schematic structural diagram of an embodiment of a composite controlled stratified oil production tool according to the present invention;
[0029] Figure 2 The diagram is a structural diagram of the composite controlled stratified oil production tool of the present invention using a steel wire measuring and adjusting pipe string.
[0030] In the figure: 1. Tubing hanger; 2. Casing; 3. Bifurcated joint; 4. Downhole electric pump; 5. Interlayer isolation tool; 6. Control cable; 7. Sealing structure; 8. Composite cable-controlled production tool; 9. Controller; 10. Wire rope; 11. Measuring and adjusting instrument; 12. Wire rope winch. DETAILED DESCRIPTION
[0031] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.
[0032] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0033] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.
[0034] Figure 1 It is a structural diagram of this embodiment, as shown in FIG. Figure 1 As shown, this embodiment provides a composite controlled layered oil production tool, including an oil production string, a controller 9 and a control cable 6. When in use, the oil production string is put into the well, the controller 9 is placed on the ground, and the two ends of the control cable 6 are respectively connected to the oil production string and the ground controller 9.
[0035] In this embodiment, a composite cable-controlled production tool 8 and an interlayer isolation tool 5 are installed within the production string. The interlayer isolation tool 5 is spaced apart from the composite cable-controlled production tool 8. The interlayer isolation tool 5 is used to seal and isolate the layers, and can utilize existing packers. The composite cable-controlled production tool 8 includes a main body, which is provided with an oil production channel, a first connecting structure, and a second connecting structure. The first connecting structure connects to a controller 9 via a control cable 6, enabling electronically controlled water nozzle opening adjustment, thereby adjusting the opening of the oil production channel.
[0036] Figure 2 This is a schematic diagram of the structure of the steel wire test and adjustment string in this embodiment. Figure 2 As shown, the second connection structure can be connected to the measuring and adjusting instrument 11, and the measuring and adjusting instrument 11 is connected to the controller 9 for adjusting the opening of the oil production channel.
[0037] This composite controlled stratified oil production tool, by setting a composite cable-controlled sub-production tool 8, can be connected to the controller 9 through the control cable 6 and can be connected to the measuring and adjusting instrument 11. It adopts a conventional cable-controlled oil production pipe string as a permanent downhole pipe string, and optimizes the downhole electric-controlled measuring and adjusting tool to form a composite cable-controlled sub-production tool 8. The oil production channel can be adjusted by the measuring and adjusting instrument 11, and a backup means for adjusting the oil production channel is provided when the electric control of the downhole composite controlled stratified oil production tool fails, thereby improving the reliability and long-term effectiveness of the overall tool. Compared with conventional permanent cable sub-production, it provides a backup measuring and adjusting means for the measuring and adjusting instrument. The measuring and adjusting method of the measuring and adjusting instrument is a post-entry operation mode, which can ensure that the measuring and adjusting instrument 11 is intact, and solves the problem that sub-production cannot be measured and adjusted after the downhole electric-controlled tool fails, thereby improving the measuring and adjusting reliability of the overall oil production pipe string, extending the service life of the pipe string, and effectively reducing the production cost of the oil field.
[0038] As an optional embodiment, the apparatus further includes a measuring and adjusting instrument 11 and a steel cable 10, wherein the measuring and adjusting instrument 11 is connected to the controller 9 via the steel cable 10. The measuring and adjusting instrument 11 includes a torque motor, which can adjust the opening of the liquid flow channel, i.e., the oil production channel, of the composite cable-controlled production tool 8 via the steel cable 10.
[0039] Specifically, this embodiment also includes a wire cable winch 12, and the wire cable 10 is wound on the wire cable winch 12. The wire cable winch 12 is arranged between the measuring and adjusting instrument 11 and the controller 9. When in use, the measuring and adjusting instrument 11 can be lowered into the composite cable-controlled mining tool 8 that needs to be regulated through the wire cable winch 12.
[0040] As an optional implementation, a monitoring component is further provided on the main body in this embodiment, and the monitoring component is in communication connection with the controller 9 for monitoring parameters such as pressure, temperature, flow rate, water content, etc. downhole.
[0041] The controller 9 in this embodiment can issue action instructions to the composite cable-controlled mining tool 8 and the measuring and adjusting instrument 11 in the well through the control cable 6 and the steel cable 10, and can display real-time data information such as flow, pressure, temperature, water content, etc. measured in the well.
[0042] When the production string goes into the well and works normally, each downhole dual-control composite cable-controlled production tool 8 can be controlled by the ground controller 9 to achieve the adjustment of the production channel and the reading of downhole data.
[0043] When the composite cable-controlled production tool 8 in the production string cannot be electrically controlled due to short circuit, string cable breakage, etc., the measuring and adjusting instrument 11 can be used for measurement and adjustment. The measuring and adjusting instrument 11 is connected with a steel cable 10, and the measuring and adjusting instrument 11 is lowered to the dual-controlled composite cable-controlled production tool 8 that needs to be regulated through the steel cable winch 12, and docked with its interior. The ground controller 9 controls the action of the measuring and adjusting instrument to adjust the oil production channel. At the same time, the pressure, flow, temperature and other formation parameters are monitored by the measuring and adjusting instrument and transmitted to the ground in real time through the steel cable.
[0044] As an optional embodiment, the production string includes a casing 2 and a tubing hanger 1. The casing 2 is connected to the tubing hanger 1, and the composite cable-controlled production tool 8 and the interlayer isolation tool 5 are disposed in the casing 2.
[0045] A bifurcation joint 3 and a downhole electric pump 4 are also provided in the casing 2, wherein the bifurcation joint 3 is connected to the oil pipe hanger 1; the downhole electric pump 4 is connected to the bifurcation joint 3 for lifting the downhole liquid to the ground; and the composite cable-controlled extraction tool 8 is connected to the bifurcation joint 3.
[0046] Specifically, the bifurcated joint 3 adopts a "Y"-shaped structure, comprising a main end, a first connection portion, and a second connection portion. The main end is connected to the tubing hanger 1, the first connection portion is connected to the downhole electric pump 4, which generates a lifting force within the production tubing string to lift the downhole fluid to the surface, and the second connection portion is connected to the composite cable-controlled production tool 8.
[0047] As an optional embodiment, a sealing structure 7 is further included, and a cable insertion sealing structure 7 is provided on each interlayer isolation tool 5 .
[0048] The downhole tubing in this embodiment comprises, from top to bottom, a downhole electric pump 4 , an interlayer isolation tool 5 , a composite cable-controlled production tool 8 , an interlayer isolation tool 5 , and a composite cable-controlled production tool 8 .
[0049] This embodiment also provides an operating method of a composite controlled stratified oil production tool, which specifically includes the following steps:
[0050] According to the downhole production string, composite cable-controlled production tools 8, interlayer isolation tools 5, downhole electric pumps 4 and other downhole tools are sequentially lowered; the control cable connects the composite cable-controlled production tools of each layer, passes through the interlayer isolation tools and is lowered into the well together with the production string, and is connected to the controller 9 after passing through the last interlayer isolation tool 5; after being lowered into place, the interlayer isolation tools are sealed, the downhole electric pump 4 is started for stratified oil production, and the composite cable-controlled production tools 8 are controlled by the controller 9 to adjust the oil production channels of each layer.
[0051] If the electric control function of the composite cable-controlled production tool 8 fails and needs to be measured and adjusted, the measuring and adjusting instrument 11 is connected via the steel cable 10 and lowered into the second connection structure of the composite cable-controlled production tool 8 to adjust the oil production channels of each layer via the measuring and adjusting instrument 11.
[0052] Compared to the existing technology, which uses a permanently installed control cable in the tubing as the only means of electronically controlling and adjusting downhole tools, failure of the control cable electronic control results in loss of the oil production channel control function, making it impossible to implement fine-grained layered measurement and adjustment. This operation method, by adding a backup measurement and adjustment instrument 11 for measurement and adjustment, allows the instrument 11 to be lowered into the tubing to adjust the downhole oil production channel and collect downhole data by operating the steel cable 10 alone. This reduces the risk of failure and effectively saves the operating costs associated with replacing the tubing due to failure of the downhole electronic control tool.
[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A composite controlled stratified oil production tool, characterized in that: It includes an oil production string, a controller and a control cable. A composite cable-controlled production tool and an interlayer isolation tool are installed in the oil production string, wherein: The interlayer isolation tool and the composite cable-controlled production tool are arranged at intervals. The composite cable-controlled production tool includes a main body, and the main body is provided with an oil production channel, a first connecting structure and a second connecting structure. The first connecting structure can be connected to the controller through the control cable to adjust the opening of the oil production channel. The second connecting structure can be connected to a measuring and adjusting instrument, and the measuring and adjusting instrument is connected to the controller to adjust the opening of the oil production channel.
2. The composite controlled stratified oil production tool according to claim 1, characterized in that: It also includes the measuring and adjusting instrument and a steel cable, and the measuring and adjusting instrument is connected to the controller through the steel cable.
3. The composite controlled stratified oil production tool according to claim 2, characterized in that: It also includes a steel cable winch, the steel cable is wound on the steel cable winch, and the steel cable winch is arranged between the measuring and adjusting instrument and the controller.
4. The composite controlled stratified oil production tool according to claim 2, characterized in that: The measuring and adjusting instrument includes a torque motor.
5. The composite controlled stratified oil production tool according to any one of claims 1 to 4, characterized in that: The production tubing string includes a casing and a tubing hanger, wherein: The casing is connected to the tubing hanger; The composite cable-controlled mining tool and the interlayer isolation tool are arranged in the casing.
6. The composite controlled stratified oil production tool according to claim 5, characterized in that: A bifurcated joint and a downhole electric pump are also provided in the casing, wherein: The bifurcated joint is connected to the oil pipe hanger; The downhole electric pump is connected to the bifurcated joint and is used to lift the downhole liquid to the surface; The composite cable-controlled mining tool is connected to the bifurcation joint.
7. The composite controlled stratified oil production tool according to any one of claims 1 to 4, characterized in that: It also includes a sealing structure, and a cable insertion sealing structure is provided on each layer of the interlayer isolation tool.
8. The composite controlled stratified oil production tool according to any one of claims 1 to 4, characterized in that: A monitoring component is also provided on the main body, and the monitoring component is in communication connection with the controller for monitoring the pressure, temperature, flow rate and water content in the well.
9. An operating method of the composite controlled stratified oil production tool according to any one of claims 1 to 8, comprising the following steps: The composite cable-controlled production tool and the interlayer isolation tool are sequentially lowered along the production string into the well; The control cable connects the composite cable-controlled production tools of each layer, passes through the isolation tools between each layer, and is lowered into the well along with the production string. After passing through the last isolation tool between layers, it is connected to the controller. After being lowered into place, the isolation tools between the layers are sealed, and the controller is used to control the composite cable-controlled production tools to adjust the oil production channels of each layer and carry out stratified oil production.
10. The operating method of the composite controlled stratified oil production tool according to claim 9, characterized in that: If the electric control function of the composite cable-controlled production tool fails and needs to be measured and adjusted, the measuring and adjusting instrument is connected via a steel cable and lowered into the second connection structure of the composite cable-controlled production tool, and the oil production channels of each layer are adjusted by the measuring and adjusting instrument.