CN111101928A

CN111101928A - Well depth measuring system and method

Info

Publication number: CN111101928A
Application number: CN201911399986.3A
Authority: CN
Inventors: 黄学锋; 黄学辉
Original assignee: Xi'an Guoyi Measurement & Control Co ltd
Current assignee: Xi'an Guoyi Measurement & Control Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-05

Abstract

The application relates to the technical field of drilling, in particular to a well depth measuring system and method. The system and the method comprise the following steps: counting the number of loaded drill rods at the bottom of the well from the derrick to the ground; monitoring the distance from a hook of the derrick to a drilling floor in real time; inquiring the length of each loaded drill rod in a preset drill rod information list according to the number of the loaded drill rods, and adding the lengths of the loaded drill rods to obtain the total length of the drill rods, wherein the drill rod information list comprises the corresponding relation between the installation sequence and the length of the drill rods; and subtracting the distance from the hook to the drilling platform surface and the distance from the drilling platform surface to the ground at the current moment from the total length of the drill rod to obtain the well depth at the current moment. The system and the method provided by the embodiment do not need manual auxiliary operation, and have high calculation efficiency and high precision.

Description

Well depth measuring system and method

Technical Field

The application relates to the technical field of drilling, in particular to a well depth measuring system and method.

Background

In the process of drilling construction, constructors need to know the changing situation of the well depth in real time, and therefore the well depth needs to be measured in real time in the process of drilling. .

At present, the well depth is mainly calculated by adding a winch tachometer on a winch bearing of a drilling derrick rig of a drilling derrick by field logging crew working personnel, calculating the lifting and lowering length of a steel wire rope on the winch by measuring the rotation of the winch, manually corresponding a pre-measured labeled drill rod in logging software, adding length data of one drill rod in the software by using one drill rod manually, and adding the lowering length of the steel wire rope during drilling by using the accumulated length of all the drill rods to calculate the current well depth.

The well depth calculation method is complex and easy to calculate by mistake, and not only is low in measurement efficiency, but also is poor in calculation precision.

Disclosure of Invention

The embodiment of the application provides a well depth measuring system and method, and aims to solve the problems of low efficiency and poor precision of the existing well depth measurement.

In a first aspect, the present embodiments provide a well depth measurement system, comprising:

the first sensor is used for counting the number of loaded drill rods on the derrick to the bottom of the well below the ground;

the second sensor is used for monitoring the distance from a hook of the derrick to the surface of the drill floor in real time;

the data acquisition and conversion module is communicated with the first sensor and the second sensor and is used for sending the number of the loaded drill rods and the distance from the hook to the drilling floor at the current moment to a computer;

the computer configured to:

inquiring the length of each loaded drill rod in a preset drill rod information list according to the number of the loaded drill rods, and adding the lengths of the loaded drill rods to obtain the total length of the drill rods; the drill rod information list comprises the corresponding relation between the installation order and the length of the drill rods;

and subtracting the distance from the hook to the drilling platform surface and the distance from the drilling platform surface to the ground at the current moment from the total length of the drill rod to obtain the well depth at the current moment.

In a first implementation form of the first aspect, the computer is further configured to generate a well depth data report according to a corresponding relationship between the well depth measurement time and the well depth.

In a second implementation manner of the first aspect, the first sensor is further configured to send the number of the loaded drill rods at the bottom of the well below the ground to the data acquisition and conversion module in an analog quantity of 4-20 mA; the second sensor is also used for sending the distance from the hook to the surface of the drill rig to the data acquisition and conversion module in a 4-20mA analog quantity.

In a third implementation manner of the first aspect, the first sensor is an explosion-proof grating coding sensor; the second sensor is an explosion-proof laser sensor.

In a fourth implementation manner of the first aspect, the acquisition and conversion module is further configured to acquire analog quantity data transmitted by the first sensor and the second sensor, output the analog quantity data as an ethernet digital quantity signal, and transmit the ethernet digital quantity signal to the computer through a Modbus TCP communication protocol.

In a second aspect, the present embodiments provide a well depth measuring method, including:

counting the number of loaded drill rods at the bottom of the well from the derrick to the ground;

monitoring the distance from a hook of the derrick to a drilling floor in real time;

inquiring the length of each loaded drill rod in a preset drill rod information list according to the number of the loaded drill rods, and adding the lengths of the loaded drill rods to obtain the total length of the drill rods, wherein the drill rod information list comprises the corresponding relation between the installation order and the length of the drill rods;

In a first implementation form of the second aspect, the method further comprises: and generating a well depth data report according to the corresponding relation between the well depth measuring time and the well depth.

The beneficial effect that this application embodiment can reach:

the well depth measuring system and method provided by the embodiment can measure the data of the loaded drill rod and the distance from the hook to the table top in real time, and accurately calculate the well depth in real time by combining the preset drill rod information list and the distance from the drill table top to the ground, without manual auxiliary operation, and have high calculation efficiency and high precision.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a derrick provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a well depth measurement system provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

At present, as shown in fig. 1, various types of derricks used in domestic oilfield drilling generally comprise a derricks frame body, a drilling platform surface, a hook, a drill rod and a mouse hole. The drilling platform surface is arranged at the middle part of the derrick and is 2-3m away from the ground. The top of the well frame above the drilling platform is hung with a fixed pulley to form a big hook, the big hook is positioned above the drilling platform, and a square drill rod below the big hook is vertically connected with a plurality of drill rods which are continuously lengthened and extend to the underground. A vertical pipe section for temporarily storing a single drill rod to be connected is called a mouse hole, and the mouse hole is communicated with the upper part of the drill floor. In one example, the length of the mouse hole may be 9.6 m.

In the drilling process, the drill rod is driven by the motor to continuously drill into the ground, so that the drilling process is formed. In the process of downward drilling of the drilling machine, the newly connected drill rod is continuously vertically and downwardly conveyed into the ground along with the extension of the well depth, and the hook continuously moves vertically and downwardly close to the surface of the drilling platform under the condition of being connected with the underground drill rod. When the length of the drill rod is not enough, the drill rod to be connected is sequentially hung into the mouse hole on the drill floor in advance according to the requirement of the drilling well depth, so that the kelly and the drill rod connected underground on the drill floor are disconnected and then are connected with the drill rod in the mouse hole in an upper buckling mode. After the drill rods are connected, the drill rods are lifted out of the mouse holes and connected with the uppermost ends of the underground drill rod strings clamped on the drilling platform surface, and the drill rods are placed into a well hole below the derrick to start downward continuous drilling after being connected.

In order to solve the problems of low efficiency and poor precision of the current well depth measurement, the embodiment provides a well depth measurement system applied to the derrick, so as to measure the depth of a drilled well efficiently and precisely.

It is noted that the term "module," as used herein, refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

Referring to fig. 2, a well depth measuring system is provided in this embodiment. The system comprises: the system comprises an explosion-proof grating coding sensor, an explosion-proof laser sensor, a data acquisition and conversion module and a computer.

The anti-explosion grating coding sensor is arranged in the mouse hole and used for monitoring the number of the drill rods which are accumulated in the mouse hole, wherein the number is the number of the loaded drill rods at the bottom of the well from the derrick to the ground. When the explosion-proof grating coding sensor is hung into a mouse hole according to a drill rod, the explosion-proof grating coding sensor starts to count. After the monitoring data is updated, the explosion-proof grating coding sensor sends the detected number of the loaded drill rods to the data acquisition and conversion module in a 4-20mA analog quantity so as to send the data to the computer by the data acquisition and conversion module.

The anti-explosion laser sensor is arranged on the hook of the derrick and used for monitoring the distance from the hook of the derrick to the drilling platform surface in real time in the drilling process and sending the distance from the hook to the drilling platform surface to the data acquisition and conversion module in a 4-20mA analog quantity so as to be sent to a computer by the data acquisition and conversion module.

And the data acquisition and conversion module is communicated with the explosion-proof grating coding sensor and the explosion-proof laser sensor. The data acquisition and conversion module is used for outputting the received analog quantity data of the number of the loaded drill rods and the distance from the hook to the drill floor at the current moment, outputting an Ethernet digital quantity signal and transmitting the Ethernet digital quantity signal to the computer through a Modbus TCP communication protocol.

In one possible implementation mode, the explosion-proof grating coding sensor and the explosion-proof laser sensor are in wired connection with the data acquisition and conversion module. In another possible implementation mode, the explosion-proof grating coding sensor and the explosion-proof laser sensor are connected with the data acquisition and conversion module in a wireless mode.

The computer is configured to inquire the length of each loaded drill rod in the drill rod information list according to the number of the loaded drill rods, and add the lengths of the loaded drill rods to obtain the total length of the drill rods; and subtracting the distance from the big hook to the drilling platform surface and the distance from the drilling platform surface to the ground at the current moment from the total length of the drill rod to obtain the well depth at the current moment.

In this embodiment, the computer may be an intelligent electronic device with a display, such as a notebook computer, a desktop computer, a smart phone, and a tablet computer, which is not limited in this embodiment.

In addition, it should be noted that, since the drilling depth is usually deep (e.g. 3000m), a plurality of drill rods connected in sequence are usually required during the drilling process. The drill rods must be connected in a specific order during the installation process to ensure the reliability of the drilling process. Therefore, before drilling construction, constructors need to measure the lengths of all drill rods to be used, a drill rod information list is generated according to the lengths of the drill rods and the installation sequence of the drill rods, and the drill rod information list is recorded into a computer.

In the present embodiment, taking the drill rod information list exemplarily shown in table 1 as an example, the well depth is calculated when the distance from the drill floor to the ground is 3m, the number of the drill rods loaded at the bottom of the well below the ground is 5, and the distance from the hook to the drill floor is 5.5 m. Specifically, the well depth H ═ (9.75+9.65+9.70+9.69+9.72+9.78) -3-5.5 ═ 40.07 m.

In table 1, the numbers indicate the installation order of the drill rods. For example, the number 1 indicates the first installation of the drill rod, and the number 5 indicates the 5 th installation of the drill rod.

TABLE 1 drill pipe information List

Numbering	Length/m
		1	9.75
2	9.65
		3	9.70
4	9.69
		5	9.78
6	9.76
		7	9.81
8	9.74
		9	9.72
…	…
		50	9.69

In addition, in the embodiment, the computer is further configured to generate a well depth data report according to the corresponding relation between the well depth measurement time and the well depth, so as to vividly show the change relation of the well depth along with the time.

In summary, the well depth measuring system provided by the embodiment can measure the data of the loaded drill rod and the distance from the hook to the table top in real time, and accurately calculate the well depth in real time by combining the preset drill rod information list and the distance from the drill table top to the ground, without manual auxiliary operation, and has high calculation efficiency and high precision.

In addition, the well depth measurement system provided by the embodiment can also achieve the following beneficial effects:

(1) the accurate well depth is calculated through a field sensor and data processing software, and the precision of real-time well depth data reaches centimeter level and is far higher than that of manual calculation.

(2) Manual operation in the acquisition and calculation process is eliminated, and well depth miscalculation caused by human errors is avoided.

(3) The field sensor hardware meets the explosion-proof requirement of the oil field, and has no potential safety hazard in construction.

(4) The equipment installation is simple, and the cost is with low costs.

It is noted that the terms first, second, third and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used are interchangeable under appropriate circumstances and can be implemented in sequences other than those illustrated or otherwise described herein with respect to the embodiments of the application, for example. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It is to be understood that the present application is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A well depth measurement system, comprising:

the computer configured to:

according to the number of the loaded drill rods, inquiring the length of each loaded drill rod in a preset drill rod information list, and adding the lengths of the loaded drill rods to obtain the total length of the drill rods; the drill rod information list comprises the corresponding relation between the installation order and the length of the drill rods;

2. The well depth measurement system of claim 1, wherein the computer is further configured to generate a well depth data report based on a correspondence between well depth measurement time and well depth.

3. The well depth measurement system of claim 1 or 2,

the first sensor is also used for sending the number of the loaded drill rods to the data acquisition and conversion module by using 4-20mA analog quantity; the second sensor is also used for sending the distance from the hook to the surface of the drill rig to the data acquisition and conversion module in a 4-20mA analog quantity.

4. The well depth measurement system of claim 3, wherein the first sensor is an explosion-proof grating coded sensor; the second sensor is an explosion-proof laser sensor.

5. The well depth measurement system of claim 3,

the acquisition conversion module is also used for acquiring analog quantity data transmitted by the first sensor and the second sensor, outputting the analog quantity data as an Ethernet digital quantity signal and transmitting the analog quantity data to the computer through a Modbus TCP communication protocol.

6. A method of measuring well depth, comprising:

7. The method of claim 6, further comprising: and generating a well depth data report according to the corresponding relation between the well depth measuring time and the well depth.