CN111337283A - Function test experimental device and method for deepwater surface conduit feeding tool - Google Patents
Function test experimental device and method for deepwater surface conduit feeding tool Download PDFInfo
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- CN111337283A CN111337283A CN202010185463.5A CN202010185463A CN111337283A CN 111337283 A CN111337283 A CN 111337283A CN 202010185463 A CN202010185463 A CN 202010185463A CN 111337283 A CN111337283 A CN 111337283A
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Abstract
The invention discloses a function test experimental device and method for a deepwater surface conduit running-in tool, wherein the device comprises an experimental frame, a base, a low-pressure well head, a deepwater surface conduit running-in tool, an adapter, a drill rod and a motor. According to the experimental device and the method for testing the function of the feeding tool of the deep-water surface layer guide pipe, provided by the invention, the processes of locking, releasing, recovering and the like of the feeding tool during deep-water continuous drilling are simulated through the motor, the data collector, the controller and the like, and indoor experimental evaluation is carried out on the feeding tool, so that the safety and reliability degree of the feeding tool is researched, a basis is provided for deep-water guide pipe injection and downward movement, the number of accidents in the deep-water guide pipe injection and downward movement process is reduced, and the high efficiency, the accuracy and the economy of deep-water drilling are improved.
Description
Technical Field
The invention relates to the technical field of marine oil and gas drilling, in particular to a function test experimental device and method for a deepwater surface conduit feeding tool.
Background
Deep water drilling generally refers to drilling with offshore operation water depth of more than 900 meters, collapse easily occurs due to low strength of non-diagenetic stratum at the shallow part of the deep water drilling surface layer in the deep water drilling process, and a deep water surface layer guide pipe is used as a first layer sleeve pipe installed in the whole deep water oil well construction process, provides structural support for all subsequent sleeve pipes and well head equipment, and is a throat of the deep water drilling.
The deepwater surface conduit jet running-in technology is a key link of deepwater drilling engineering construction, and can realize continuous drilling and feeding of multiple steps such as 'one-opening' drilling, conduit running-in, 'two-opening' borehole drilling and the like through one-trip pipe column, thereby greatly saving the operation time and cost. The deep water surface conduit feeding tool is a key tool for realizing the purpose of feeding a conduit into a surface conduit by deep water jet, and is also called as a deep water continuous drilling feeding tool because the deep water continuous drilling feeding tool has the function of continuous drilling. During use, the deepwater surface conduit feeding tool is firstly assembled with drilling tools such as a drill bit and the like, then assembled with a low-pressure wellhead head, a surface conduit and a mud pad, then lowered into a specified position of the seabed, and finally subjected to injection operation. After the deep water surface layer guide pipe feeding tool is ejected in place and mechanically connected, the releasing pin at the upper part is cut off to release the deep water surface layer guide pipe feeding tool, the mandrel is lowered down to perform 'two-way' drilling, the drill rod is lifted up after the deep water surface layer guide pipe feeding tool is drilled in place, the positioning pin between the deep water surface layer guide pipe feeding tool and the low-pressure wellhead is cut off by the lifting force, and the deep water surface layer guide pipe feeding tool is separated from the low-pressure wellhead and is recycled.
In the process of carrying out surface conduit injection operation by using the deepwater surface conduit feeding tool, the seabed complex environment influences the working process of the feeding tool, and the smooth operation of each link of the deepwater surface conduit feeding tool is very important. However, due to the lack of a corresponding process detection simulation device for laboratory research, the locking, running-in, releasing, recovering and other processes of the deep-water surface conduit running tool cannot be effectively researched, the qualification evaluation of the working process of the deep-water surface conduit running tool is restricted, the function of the running tool can be effectively realized, and worry is generated, so that the well drilling efficiency is restricted and the deep-water well drilling cost is increased due to the conservative practice.
Disclosure of Invention
The invention aims to provide a function test experimental device and a function test experimental method for a deepwater surface conduit running tool, which can perform indoor experimental simulation and evaluation on functions of the processes of locking, running-in, releasing, recovering and the like of the deepwater surface conduit running tool, and are used for solving the problems that drilling efficiency is restricted and deepwater drilling cost is increased due to a conservative method which is worried about that the functions of the running tool cannot be effectively realized.
The invention aims to provide a function test experimental device for a deepwater surface conduit feeding tool, which comprises an experimental frame, a base, a low-pressure wellhead head, the deepwater surface conduit feeding tool, an adapter, a drill rod and a rotating motor, wherein the low-pressure wellhead head is connected with the base through the adapter; the base is arranged at the bottom of the experiment frame, the low-pressure wellhead is fixed on the base, and an output shaft of the rotating motor is in threaded connection with the top end of the drill rod; the bottom end of the drill rod is fixedly connected with the rotary motor through the adapter and the core shaft of the deepwater surface conduit feeding tool.
Preferably, the experiment frame is provided with a telescopic cylinder, and the rotating motor is fixedly connected with a piston of the telescopic cylinder.
Preferably, the upper part and the lower part of the adapter are respectively provided with an internal thread and an external thread, the internal thread on the upper part of the adapter is matched with the thread on the drill rod, and the external thread on the lower part of the adapter is a tapered thread joint and is matched with the tapered thread on the end part of the mandrel of the deepwater surface conduit feeding tool.
Preferably, two bosses are arranged in the upper part of the low-pressure well head, two flanges are arranged on the lower part of the deepwater surface conduit feeding tool, the bosses on the upper part of the low-pressure well head are matched with the flanges on the lower part of the deepwater surface conduit feeding tool, and the lower part of the deepwater surface conduit feeding tool is tightly sleeved in the low-pressure well head.
The invention also discloses a function test experimental method of the deepwater surface conduit running tool, which comprises a locking method of the deepwater surface conduit running tool and a reliability evaluation method thereof, an unlocking method of the deepwater surface conduit running tool, a releasing method of the deepwater surface conduit running tool and a recovery method of the deepwater surface conduit running tool.
Further, the locking method of the deep water surface conduit running tool comprises the following steps:
step S11: selecting the power of a rotating motor;
step S12: setting the rotation output force and the rotation number of turns of the rotating motor, and starting the rotating motor;
step S13: the rotary motor drives the drill rod to rotate, and the mandrel of the deepwater surface conduit feeding tool is inverted for a plurality of circles until the deepwater surface conduit feeding tool is locked with the low-pressure wellhead;
step S14: the controller sends a closing signal to the rotating motor, and the rotating motor is closed.
Further, the method for evaluating the locking reliability of the deepwater surface conduit running tool comprises the following steps: and starting a telescopic cylinder rotating motor, applying a certain over-lifting load, such as 100KN, to the drill rod, observing whether the deep water surface conduit feeding tool and the low-pressure wellhead head have displacement change, if no obvious displacement exists, judging that the locking of the deep water surface conduit feeding tool is reliable, otherwise, disassembling the deep water surface conduit feeding tool, and repeating the locking method of the deep water surface conduit feeding tool until the locking of the deep water surface conduit feeding tool is judged to be reliable.
Further, the unlocking method of the deep water surface conduit running tool comprises the following steps:
step S21: starting a rotating motor, driving a drill rod to send the water surface layer guide pipe into a mandrel of the tool to rotate forward for a plurality of circles by the rotating motor until the deep water surface layer guide pipe is sent into the tool and the displacement change occurs between the deep water surface layer guide pipe and the low-pressure wellhead head;
step S22: the controller sends a closing signal to the rotating motor, and the rotating motor is closed.
Further, the method for releasing the deep water surface conduit running tool comprises the following steps:
step S31: starting the lifting telescopic cylinder, lowering the front end of the mandrel to the position of releasing the pin, and stopping the telescopic cylinder;
step S32: starting a rotating motor, wherein the rotating motor drives a drill rod to rotate the mandrel forwards until the release pin is sheared;
step S33: the controller sends a closing signal to the rotating motor, and the rotating motor is closed;
step S34: starting the telescopic cylinder, continuously lowering the mandrel to a certain distance, such as 0.5m, and stopping the telescopic cylinder;
step S35: starting a rotating motor, driving a mandrel to rotate by a drill rod, and sending a closing signal to the rotating motor by a controller;
step S36: observing whether the mandrel can descend to a specified position and rotate for a specified time without failure;
further, the recovery method of the deep water surface conduit running tool comprises the following steps:
step S41: the telescopic cylinder contracts, and the mandrel is lifted upwards until the mandrel clamps the conical sliding sleeve;
step S42: and continuously contracting the telescopic cylinder to separate the deepwater surface conduit feeding tool from the low-pressure wellhead head and recovering the deepwater surface conduit feeding tool.
The invention has the beneficial effects that:
according to the experimental device and the method for testing the function of the feeding tool of the deepwater surface conduit, provided by the invention, the processes of locking, running-in, releasing, recovering and the like of the feeding tool during deepwater continuous drilling are simulated through the motor, the data collector, the controller and the like, and indoor experimental evaluation is carried out on the feeding tool, so that the safety and reliability degree of the feeding tool is researched, a basis is provided for deepwater conduit injection running-in, the number of accidents in the deepwater conduit injection running-in process is reduced, and the efficiency, the accuracy and the economy of deepwater drilling are improved.
Drawings
Fig. 1 is a schematic structural diagram of a functional test experimental device for a deep water surface conduit running tool provided in embodiment 1 of the present invention;
fig. 2 is a schematic half-sectional view of a deepwater surface conductor running tool provided in embodiment 1 of the present invention.
Description of reference numerals:
FIG. 1: 1-experiment frame; 2-a base; 3-low pressure wellhead head; 4-deep water surface conduit feeding tool; 5-an adapter; 6-a drill rod; 7-a rotating electrical machine; 8-a telescopic cylinder; 9-a controller.
FIG. 2: 401-a mandrel; 402-a liner; 403-a push rod; 404-locking a clamp spring; 405-a position indicating rod; 406-release of the pin; 407-anti-rotation pins; 408-a locating pin; 409-a body; 410-drain holes; 420-conical sliding sleeve.
Detailed Description
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "left" and "right" are orientations or positional relationships described based on the drawings, and are for convenience of description of the present invention. The terms "first", "second", etc. are used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
Example 1
Example 1 provides a deep water surface layer conduit running tool function test experimental device, and the structure thereof is described in detail below.
Referring to fig. 1, the experimental device for testing the function of the deepwater surface conduit feeding tool comprises an experimental frame 1, a base 2, a low-pressure wellhead 3, a deepwater surface conduit feeding tool 4, an adapter 5, a drill rod 6, a rotating motor 7, a telescopic cylinder 8 and a controller 9.
The base 2 is arranged at the bottom of the experimental frame 1, and specifically, the base 2 is a reinforced concrete structure base. The low-pressure wellhead head 3 is fixed on the base 2 through fastening bolts.
The upper part of the low-pressure well head 3 is a deepwater low-pressure well head, two bosses are arranged in the deepwater low-pressure well head, two flanges are arranged at the lower part of the deepwater surface conduit feeding tool 4, the bosses at the upper part of the low-pressure well head 3 are matched with the flanges at the lower part of the deepwater surface conduit feeding tool 4, and the lower part of the deepwater surface conduit feeding tool 4 is tightly sleeved in the low-pressure well head 3.
In order to enhance the bearing capacity of the low-pressure wellhead head 3 and the deepwater surface conduit running tool 4, a mud pad is arranged at the joint of the low-pressure wellhead head 3 and the deepwater surface conduit running tool 4.
In addition, the lower-middle part of the low pressure wellhead 3 is a surface casing which is connected with the upper part of the low pressure wellhead 3 by bolts. The lower part of the low-pressure wellhead head 3 is fixedly connected with the base 2 through bolts, and the low-pressure wellhead head is fixed on the base 2, so that the mandrel 401 of the deepwater surface conduit running tool 4 is stable in rotation and lifting.
The experiment frame 1 further comprises a horizontal beam and two support plates for supporting two ends of the beam, the two support plates are fixed on the base 2, and the telescopic cylinder 8 is fixed below the beam of the experiment frame 1. The rotating motor 7 is fixed on a piston of the telescopic cylinder 8, and an output shaft of the rotating motor 7 is in threaded connection with the top end of the drill rod 6.
The bottom end of the drill rod 6 is fixedly connected with a mandrel 401 of the deepwater surface conduit running tool 4 through an adapter 5.
The upper part and the lower part of the adapter 5 are respectively provided with an internal thread and an external thread, wherein the internal thread on the upper part of the adapter 5 is matched with the thread on the drill rod 6, and the external thread on the lower part of the adapter 5 is a tapered thread joint which is matched with the tapered thread on the end part of the mandrel 401 of the deepwater surface conduit feeding tool 4.
The rotating motor 7 is connected with a controller 9, and the controller 9 can control the rotating output force and the number of rotating turns of the rotating motor 7 for selecting the rotating motor 7 with the set power.
In the above embodiment, the controller 9 may be a desktop computer, a notebook computer, or the like.
Referring to fig. 2, the deepwater surface conductor running tool 4 comprises a mandrel 401, a bushing 402, a push rod 403; a locking clamp spring 404, a position indicating rod 405, a releasing pin 406, an anti-rotation pin 407, a positioning pin 408, a body 409, a liquid discharge hole 410 and a conical sliding sleeve 420,
bushing 402 is sleeved on mandrel 401 by a release pin 406;
the conical sliding sleeve 420 is sleeved outside the bushing 402, the conical sliding sleeve 420 is connected with the bushing 402 through threads, and a clamping part is arranged outside the conical sliding sleeve 420;
the body 409 is sleeved outside the conical sliding sleeve 420;
the body 409 is provided with a plurality of through radial holes;
the push rod 403 is arranged in the radial hole;
one end of the push rod 403 is matched with the clamping part to form a conical matching structure, and the other end of the push rod is provided with a locking clamp spring 404;
the position indicating rod 405 can synchronously and axially move with the conical sliding sleeve 420;
the anti-rotation pin 407 is used for preventing the body 409 and the surface layer conduit from rotating relatively;
the dowel 408 is used to prevent the body 409 from maintaining a connection with the surface conduit after the release dowel 406 shears.
The deep water surface conduit feeding tool 4 is a prior art, and for more detailed introduction of the internal structure of the deep water surface conduit feeding tool 4, reference is made to the "deep water drilling surface conduit feeding tool" (application number is CN201510365639.4), the "catheter head feeding tool with continuous drilling function" (application number is cn201820933404.x), the "deep water surface conduit feeding tool and its operation method" (application number is 201911125180.5), and the like.
Example 2
The locking method of the deepwater surface conduit running tool 4 comprises the following steps:
step S11: selecting the power of the rotating motor 7;
step S12: setting the rotation output force and the rotation number of turns of the rotating motor 7, and starting the rotating motor 7;
step S13: the rotary motor 7 drives the drill rod 6 to rotate, and the mandrel 401 of the deep water surface conduit feeding tool 4 is inverted for a plurality of circles, preferably 7 circles and 1/4 circles until the deep water surface conduit feeding tool 4 is locked with the low-pressure wellhead head 3;
step S14: the controller 9 sends a shutdown signal to the rotating electrical machine 7, and the rotating electrical machine 7 is shut down.
The method for evaluating the locking reliability of the deepwater surface conduit running tool 4 comprises the following steps: and starting the telescopic cylinder 8 to rotate the motor 7, applying a certain lifting load, such as 100KN, to the drill rod 6, observing whether the deep water surface conduit feeding tool 4 and the low-pressure well head 3 are subjected to displacement change, if no obvious displacement exists, judging that the locking of the deep water surface conduit feeding tool 4 is reliable, otherwise, disassembling the deep water surface conduit feeding tool 4, and repeating the locking method of the deep water surface conduit feeding tool 4 until the locking of the deep water surface conduit feeding tool 4 is judged to be reliable.
The unlocking method of the deepwater surface conduit running tool 4 comprises the following steps:
step S21: starting the rotating motor 7, and driving the drill rod 6 by the rotating motor 7 to feed the water surface layer conduit into the mandrel 401 of the tool 4 for several circles, preferably 7 circles plus 1/4 circles, until the deep water surface layer conduit feeding tool 4 and the low-pressure wellhead 3 are subjected to displacement change;
step S22: the controller 9 sends a shutdown signal to the rotating electrical machine 7, and the rotating electrical machine 7 is shut down.
The method for releasing the deepwater surface conduit running tool 4 comprises the following steps:
step S31: starting the lifting telescopic cylinder 8, lowering the front end of the mandrel 401 to the position of the release pin 406, and stopping the telescopic cylinder 8;
step S32: starting the rotating motor 7, wherein the rotating motor 7 drives the drill rod 6 to rotate the mandrel 401 forwards, preferably 1/8 circles, until the release pin 406 is sheared;
step S33: the controller 9 sends a closing signal to the rotating motor 7, and the rotating motor 7 is closed;
step S34: starting the telescopic cylinder 6, continuously lowering the mandrel 401 to a certain distance, preferably 0.5m, and stopping the telescopic cylinder 8;
step S35: starting the rotating motor 7, driving the mandrel 401 to rotate by the drill rod 6, preferably rotating for 10min, and sending a closing signal to the rotating motor 7 by the controller 9;
step S36: observing whether the mandrel 401 can descend to a specified position and rotate for a specified time without failure;
the method for recovering the deepwater surface conduit running tool 4 comprises the following steps:
step S41: the telescopic cylinder 6 contracts, and the mandrel 401 is lifted upwards until the mandrel 401 clamps the conical sliding sleeve 420;
step S42: and continuously contracting the telescopic cylinder 6 to separate the deepwater surface conduit feeding tool 4 from the low-pressure wellhead 3 and recovering the deepwater surface conduit feeding tool 4.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A functional test experimental device for a deepwater surface conduit feeding tool is characterized by comprising an experimental frame (1), a base (2), a low-pressure wellhead head (3), a deepwater surface conduit feeding tool (4), an adapter (5), a drill rod (6) and a rotating motor (7);
the base (2) is arranged at the bottom of the experiment frame (1), the low-pressure wellhead head (3) is fixed on the base (2), and an output shaft of the rotating motor (7) is in threaded connection with the top end of the drill rod (6);
the bottom end of the drill rod (6) is fixedly connected with the rotary motor (7) through the adapter (5) and the mandrel (401) of the deepwater surface conduit feeding tool (4).
2. The device for testing the function of the running tool of the surface conduit in deep water according to claim 1,
the experiment frame (1) is provided with a telescopic cylinder (8), and the rotating motor (7) is fixedly connected with a piston of the telescopic cylinder (8).
3. The device for testing the function of the running tool of the surface conduit in deep water according to claim 1,
the deep water surface conduit feeding tool is characterized in that an inner thread and an outer thread are respectively arranged on the upper portion and the lower portion of the adapter (5), the inner thread on the upper portion of the adapter (5) is matched with the thread on the drill rod (6), and the outer thread on the lower portion of the adapter (5) is a tapered threaded joint and is matched with the tapered thread on the end portion of the mandrel (401) of the deep water surface conduit feeding tool (4).
4. The device for testing the function of the running tool of the surface conduit in deep water according to claim 1,
two bosses are arranged in the upper part of the low-pressure well head (3), two flanges are arranged on the lower part of the deepwater surface conduit feeding tool (4), the bosses on the upper part of the low-pressure well head (3) are matched with the flanges on the lower part of the deepwater surface conduit feeding tool (4), and the lower part of the deepwater surface conduit feeding tool (4) is tightly sleeved in the low-pressure well head (3).
5. A deep-water surface conductor running tool function test experimental method using the deep-water surface conductor running tool function test experimental apparatus according to any one of claims 1 to 4, characterized in that the function test experimental method includes a locking method of the deep-water surface conductor running tool (4) and a reliability evaluation method thereof, an unlocking method of the deep-water surface conductor running tool (4), a releasing method of the deep-water surface conductor running tool (4), and a retrieving method of the deep-water surface conductor running tool (4).
6. The deep water surface conductor running tool function test experimental method of claim 5,
the locking method of the deepwater surface conduit running tool (4) comprises the following steps:
step S11: selecting the power of the rotating motor (7);
step S12: setting the rotation output force and the rotation number of turns of the rotating motor (7), and starting the rotating motor (7);
step S13: the rotary motor (7) drives the drill rod (6) to rotate, and the mandrel (401) of the deep water surface conduit feeding tool (4) is inverted for a plurality of circles until the deep water surface conduit feeding tool (4) is locked with the low-pressure wellhead head (3);
step S14: the controller (9) sends a closing signal to the rotating motor (7), and the rotating motor (7) is shut down.
7. The test method for testing the function of the running tool of the surface conduit in deep water according to claim 6,
the method for evaluating the locking reliability of the deepwater surface conduit running tool (4) comprises the following steps: starting a telescopic cylinder (8) and rotating a motor (7), applying a certain over-lifting load to a drill rod (6), observing whether the deep water surface layer conduit feeding tool (4) and the low-pressure well head (3) have displacement change, if no obvious displacement exists, judging that the locking of the deep water surface layer conduit feeding tool (4) is reliable, otherwise, disassembling the deep water surface layer conduit feeding tool (4), and repeating the locking method of the deep water surface layer conduit feeding tool (4) until the locking of the deep water surface layer conduit feeding tool (4) is judged to be reliable.
8. The deep water surface conductor running tool function test experimental method of claim 7,
the unlocking method of the deepwater surface conduit running tool (4) comprises the following steps:
step S21: starting a rotating motor (7), wherein the rotating motor (7) drives a drill rod (6) to convey the water surface layer conduit into a mandrel (401) of the tool (4) to rotate forward for a plurality of circles until the deep water surface layer conduit is conveyed into the tool (4) and the low-pressure well head (3) is subjected to displacement change;
step S22: the controller (9) sends a closing signal to the rotating motor (7), and the rotating motor (7) is shut down.
9. The method for testing the function of the running tool of the surface conduit in deep water according to claim 8,
the method for releasing the deepwater surface conduit running tool (4) comprises the following steps:
step S31: starting a lifting telescopic cylinder (8), lowering the front end of a mandrel (401) to the position of a release pin (406), and stopping the telescopic cylinder (8);
step S32: starting a rotating motor (7), wherein the rotating motor (7) drives a drill rod (6) to rotate the mandrel (401) forwards until the release pin (406) is sheared;
step S33: the controller (9) sends a closing signal to the rotating motor (7), and the rotating motor (7) is shut down;
step S34: starting the telescopic cylinder (6), continuously lowering the mandrel (401) to a certain distance, and stopping the telescopic cylinder (8);
step S35: starting a rotating motor (7), driving a mandrel (401) to rotate by a drill rod (6), and sending a closing signal to the rotating motor (7) by a controller (9);
step S36: whether the mandrel (401) can descend to a specified position without failure and rotate for a specified time is observed.
10. The deep water surface conductor running tool function test experimental method of claim 9,
the method for recovering the deepwater surface conduit running tool (4) comprises the following steps:
step S41: the telescopic cylinder (6) is contracted, and the mandrel (401) is lifted upwards until the mandrel (401) clamps the conical sliding sleeve (420);
step S42: and continuously contracting the telescopic cylinder (6) to separate the deepwater surface conduit feeding tool (4) from the low-pressure well head (3) and recovering the deepwater surface conduit feeding tool (4).
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