CN110346217B - Load testing method and testing device for marine double-wellhead derrick - Google Patents

Load testing method and testing device for marine double-wellhead derrick Download PDF

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CN110346217B
CN110346217B CN201910574680.0A CN201910574680A CN110346217B CN 110346217 B CN110346217 B CN 110346217B CN 201910574680 A CN201910574680 A CN 201910574680A CN 110346217 B CN110346217 B CN 110346217B
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wellhead
double
loading
derrick
block
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CN110346217A (en
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罗强
雷广进
刘宏亮
任克忍
高超杰
侯晓东
黄萍
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China National Petroleum Corp
Baoji Oilfield Machinery Co Ltd
CNPC National Oil and Gas Drilling Equipment Engineering Technology Research Center Co Ltd
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China National Petroleum Corp
Baoji Oilfield Machinery Co Ltd
CNPC National Oil and Gas Drilling Equipment Engineering Technology Research Center Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing

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Abstract

The invention discloses a load testing method and a method of a testing device for an ocean double-wellhead derrick, wherein the method is realized by a system consisting of a double-wellhead loading device, a tool mounting base, a matched connecting tool and the like, the tool mounting base is mounted on the double-wellhead loading device, then the ocean double-wellhead derrick is mounted on the tool mounting base, a traveling hoisting system and a loading oil cylinder are connected in place by connecting the tool, then the double-wellhead derrick is loaded by utilizing a mobile hydraulic control system, and data such as stress, displacement and the like of key point positions of a derrick main body during each load are recorded by a data acquisition system in the loading process; and finally, detecting the bearing capacity and the overall stability of the marine double-wellhead derrick according to a test report.

Description

Load testing method and testing device for marine double-wellhead derrick
Technical Field
The invention belongs to the technical field of offshore oil drilling and production equipment, and relates to a test device for a load test of an offshore double-wellhead derrick. The invention also relates to a method for the load test.
Background
Deep water oil and gas development has become the trend of offshore oil and gas development, and drilling engineering personnel provide a novel double-wellhead derrick structure applied to ultra-deep water drilling due to the characteristics of deep water drilling operation. The structure is characterized in that the drilling platform is provided with the double-wellhead derrick with the two sets of traveling hoisting systems, and the two sets of traveling hoisting systems of the double-wellhead derrick can operate in parallel, so that the drilling efficiency is improved, the drilling time is saved by 21-70%, and the offshore drilling cost is greatly saved. At present, the deepwater semi-submersible drilling platform and the drilling ship which are newly designed and built in China are basically provided with double-wellhead derricks and are gradually put into use. Because the marine double-wellhead derrick has longer, wider and higher design size than the conventional drilling derrick, two sets of traveling crane systems must meet the following requirements when carrying out marine double-wellhead derrick load tests: simultaneously loading, differential loading, alternately realizing the requirements of maximum hook load and the like; the conventional drilling machine static load test device cannot meet the requirements of installation, loading and overall stability test when the marine double-wellhead derrick carries out a load test. Therefore, a test device for installing and loading the marine double-wellhead derrick in a production manufacturing plant in a non-marine platform environment and a method for carrying out a load test on the marine double-wellhead derrick in a loading state are urgently needed.
Disclosure of Invention
The invention aims to provide a test device for marine double-wellhead derrick load test, which solves the problem that two sets of travelling and hoisting systems of a marine double-wellhead derrick can not be simultaneously loaded, differentially loaded and alternately loaded during marine double-wellhead derrick load test in the prior art.
The technical scheme includes that the test device for the load test of the marine double-wellhead derrick comprises the double-wellhead derrick, a tool crown block is fixedly installed at the top of the double-wellhead derrick, the bottom of the double-wellhead derrick is connected with a tool installation seat, the tool installation seat is fixedly connected with a double-wellhead loading device, a traveling block is placed on the center of a wellhead in the double-wellhead derrick, the tool crown block is connected with the traveling block through a drilling steel wire rope, and the lower portion of the traveling block is connected with the double-wellhead loading device through a connecting tool.
The present invention is also characterized in that,
the double-wellhead loading device comprises a loading beam I and a loading beam II which are placed on the lower layer of a foundation pit, and a bearing beam I and a bearing beam II which are installed on the upper layer of the foundation pit, wherein the bearing beam I and the bearing beam II are connected into a whole through a pin shaft, and a loading oil cylinder I and a loading oil cylinder II are respectively installed on the loading beam I and the loading beam II.
The lower part of the traveling block is connected to the tops of a loading oil cylinder I and a loading oil cylinder II of the double-wellhead loading device through a connecting tool.
The tooling crown block comprises a fixed pulley block with an installation base, and the traveling block comprises a movable pulley block.
The bearing beam I is a solid web type steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated through the middle paving platform.
The bearing beam II is a solid web type steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated through the middle paving platform.
The tool mounting seat is composed of four solid-web steel structural beams.
The double-wellhead derrick is a six-leg double-wellhead derrick structure.
It is another object of the present invention to provide a method for load testing using the above-described apparatus.
The invention also provides a method for carrying out the marine double-wellhead derrick load test, which is implemented by utilizing a test device according to the following steps:
step 1, adjusting the placing positions of a loading beam I and a loading beam II according to the center distance between two well heads on two sides of a double-well head frame, keeping a loading oil cylinder and a turning-up in an upright state, and then installing a tool installation base serving as an ocean platform deck on a well head loading device;
and 2, installing and fixing the double-wellhead derrick main bodies on the tool installation base one by one, and installing and fixing the tool crown block on the top of the double-wellhead derrick.
And 3, the drilling steel wire rope penetrates through a pulley block of the tooling crown block, bypasses the pulley block of the traveling block and then winds out from a guide pulley at the top of the tooling crown block.
Step 4, one end of the drilling steel wire rope is fixed on the tool mounting base, and the other end of the drilling steel wire rope winds a beam body of the tool mounting base and then is slowly lifted until the traveling block leaves the ground; connecting the lower part of the traveling block with the top of the loading oil cylinder by using a connecting tool, and then further lifting the rope head of the drilling steel wire rope until a traveling crane system consisting of a tool crown block, the drilling steel wire rope and the traveling block is straightened, and firmly fixing the rope head on the mounting base;
step 5, after confirming that all parts of the well mouths on the two sides of the double-well mouth derrick are connected in place and the personnel are in place again, starting to load the well mouths on the two sides of the ocean double-well mouth derrick step by step, wherein the loading process is uniform and slow until the well mouths on the two sides reach the required preset hook load; the data acquisition system sequentially records stress data when each hook is hooked, and inspectors sequentially record corresponding deformation of the derrick body;
and 6, loading the main wellhead to a preset hook load, loading the auxiliary wellhead to a corresponding hook load, slowly unloading to 0KN after the loading is finished, loading the auxiliary wellhead to the preset hook load and enabling the main wellhead to achieve a loading test of the corresponding hook load after a certain time interval, and outputting a standard test report to a designer for analysis until all test detection items are finished.
The present invention is also characterized in that,
a method for testing the load of a land drilling rig on a double-wellhead loading device utilizes a testing device, and is characterized by comprising the following steps:
step 1, firstly, adjusting a loading beam I to the central position of the loading beam I and turning up a loading oil cylinder I to keep an upright state; then placing the land drilling machine according to the position;
step 2, placing the land drilling machine on a double-wellhead loading device, and normally assembling and lifting the land drilling machine;
step 3, after the land drilling machine is lifted, connecting the land drilling machine main body to a loading oil cylinder I through a connecting tool; meanwhile, the installation of the stress acquisition device of the key measuring point of the drilling machine main body and the coordinate mark of the reference point is finished;
step 4, after the connection of each part is confirmed again and the personnel are in place, the drilling machine is loaded step by step, and the loading process is uniform and slow until the required preset hook load is achieved; the data acquisition system sequentially records stress data when each hook is loaded, and inspectors sequentially record corresponding deformation of the drilling machine main body; and slowly unloading to 0KN after loading is finished until all test detection items are finished and outputting test results into a standard test report for a designer to analyze.
The marine double-wellhead derrick load test device has the advantages that the load applied by the loading oil cylinder is transferred to the tested marine double-wellhead derrick main body through the double-wellhead loading device and the tool mounting base which is arranged on the double-wellhead loading device and plays a role in load transfer, so that hooking and loading of wellheads on two sides of the marine double-wellhead derrick are converted into internal force of a system formed by the double-wellhead loading device and the marine double-wellhead derrick, and the requirements of a load test on surrounding foundations and loading equipment are greatly reduced;
according to the method for the marine double-wellhead derrick load test, the double-wellhead loading device is relied on, the bearing beam adopts a structural scheme of combining a solid web and a truss, the bearing requirement is met, and the production and manufacturing difficulty of the bearing beam is reduced; the original double-beam structure of the bearing beam greatly increases the contact area between the loading device and the mounting base; the two-section structure of the bearing beam solves the problem that the transportation of the overlong piece is difficult; the movable loading beam can meet the requirements of double-wellhead derrick load tests with different wellhead center distances and different structural forms by adjusting the placement position, and the application range of the double-wellhead loading device is greatly expanded. The double-wellhead loading device used in the testing method has the advantages of simple structure, lighter weight and convenient production, manufacture and maintenance, can be used for accurately testing the stress condition of each part and the integral stability of the derrick under the conditions of installation and maximum hook load of the ocean double-wellhead derrick, and can also be used for testing single or integral loads of conventional drilling rigs of various types and specifications.
Drawings
FIG. 1 is a schematic structural diagram of a test device for marine double-wellhead derrick load test according to the invention;
FIG. 2 is a schematic structural diagram of a test device for marine double-wellhead derrick load test according to the invention;
FIG. 3 is a schematic structural diagram of a six-legged double-wellhead derrick load test device of the invention;
figure 4 is a schematic diagram of the land rig structure of the present invention.
In the figure, 1, a tooling crown block, 2, a double-wellhead derrick, 3, a drilling steel wire rope, 4, a traveling block, 5, a connecting tooling, 6, a tooling mounting seat, 7, a double-wellhead loading device, 8, a loading oil cylinder I, 9, a loading beam I, 10, a bearing beam I, 11, a loading beam II, 12, a bearing beam II, 13, a loading oil cylinder II, 14, a middle berth, 15, a six-leg double-wellhead derrick and 16, a land drilling machine.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
The utility model provides a test device of two well head derrick load tests in ocean, as shown in figure 1, including two well head derrick 2, 2 top fixed mounting frock overhead traveling crane 1 of two well head derrick, frock mount pad 6 is connected to 2 bottoms of two well head derrick, 6 fixed connection two well head loading device 7 of frock mount pad, place tourist coach 4 on the well head center of two well head derrick 2 inside, frock overhead traveling crane 1 and tourist coach 4 pass through well drilling wire rope 3 and connect, tourist coach 4 lower part is through connecting frock 5 and connecting two well head loading device 7.
As shown in fig. 2, the double wellhead loading device 7 comprises a loading beam i 9 and a loading beam ii 12 which are placed at the lower layer of the foundation pit, and a bearing beam i 10 and a bearing beam ii 11 which are installed at the upper layer of the foundation pit, wherein a loading oil cylinder i 8 and a loading oil cylinder ii 13 are respectively installed on the loading beam i 9 and the loading beam ii 12;
the bearing beam I10 is a solid web type steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of a pit, and the two beam bodies are separated by a middle berth 14; the bearing beam II 11 is a solid web type steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated by a middle paving platform 14; the bearing beam I10 and the bearing beam II 11 are connected into a whole through a pin shaft, the bearing beam I serves as an installation foundation during testing and transmits loads generated by a loading oil cylinder I8 and a loading oil cylinder II 13 on the bearing beam to the tool installation seat 6, the tool installation seat 6 is composed of four solid steel structure beams, the bending resistance is strong, the bearing beam I10 and the bearing beam II are used for installing the double-wellhead derrick 2 and transmitting the testing loads,
the tooling crown block 1 comprises a crown block with a mounting base, and the tooling crown block 1 is mounted and fixed on the top of the double-wellhead derrick 2; the traveling block 4 comprises a movable pulley block, and the tooling crown block 1 and the traveling block 4 are connected through a drilling steel wire rope 3 to form a set of traveling and hoisting system capable of transferring load; the lower part of the traveling block 4 is connected to the top of a loading oil cylinder of the double-wellhead loading device 7 through the connecting tool 5, and the purpose of transmitting test load to the double-wellhead derrick 2 main body from the double-wellhead loading device 7, the connecting tool 5, the traveling block 4, the drilling steel wire rope 3 and the tool crown block 1 is achieved by controlling the extension and retraction of the loading oil cylinder I8 and the loading oil cylinder II 13 in the test process.
The installation tooling crown block 1 is installed at the top of the ocean double-wellhead derrick 2 to replace a crown block compensation device equipped by a product, and a tooling installation seat 6 is fixed on a double-wellhead loading device 7 according to the installation size of the double-wellhead derrick 2 before a test; the double-wellhead derrick comprises a traveling block 4, a drilling steel wire rope 3 and a connecting tool 5, wherein the traveling block is used for connecting a loading oil cylinder I8 and a loading oil cylinder II 13 of the double-wellhead loading device to a main body of the double-wellhead derrick 2.
The double-wellhead loading device 7 is built on a test well site and is part of a test well site foundation, the contact area between the loading device and tested equipment is greatly increased by the two-section double bearing beam, the local contact load of each part is reduced, and the problem of transportation of overlong parts is solved by the two-section structure; the application range of the loading device is greatly expanded by the movable loading beam.
The invention relates to a working principle of a test device for carrying out load test on a double-wellhead derrick.A double-wellhead derrick main body and a loading wellhead device are connected into a whole through two sets of tooling trolleys, a traveling and hanging system and connecting component equipment after the double-wellhead derrick is installed in place, and then a strain test device is installed at the position of the double-wellhead derrick main body where the stress is calculated; after all the installation and connection work is finished, the hydraulic oil cylinder is controlled by a hydraulic operation system in the control room to be loaded step by step, and meanwhile, the data of stress change and displacement change of each test point of the double-wellhead derrick in the loading process are recorded by a data acquisition system.
The invention provides a method for testing the load of an ocean double-wellhead derrick, which adopts the test device and is implemented according to the following steps:
step 1, adjusting the placing positions of a loading beam I9 and a loading beam II 12 according to the center distance of two side wellheads of a double-wellhead derrick 2, and turning up a loading oil cylinder I8 and a loading oil cylinder II 13 to keep an upright state; then installing a tool installation base 6 serving as an ocean platform deck on a wellhead loading device 7;
and 2, installing and fixing the main bodies of the double-wellhead headframes 2 on the tool installation base 6 one by one, and installing and fixing the tool crown block 1 on the tops of the double-wellhead headframes 2.
And 3, the drilling steel wire rope 3 penetrates through a pulley block of the tooling crown block 1, bypasses a pulley block 4 of the traveling block and then winds out from a guide pulley at the top of the tooling crown block 1.
Step 4, one end of the drilling steel wire rope 3 is fixed on the tool mounting base 6, and the other end of the drilling steel wire rope is slowly lifted after bypassing a beam body of the tool mounting base 6 until the traveling block 4 leaves the ground; connecting the lower part of the traveling block 4 with the top of the loading oil cylinder by using a connecting tool 5, then further lifting the rope head of the drilling steel wire rope 3 until a traveling hoisting system consisting of the tool crown block 1, the drilling steel wire rope 3 and the traveling block 4 is straightened, and firmly fixing the rope head on the mounting base 6;
step 5, after confirming that all parts of the well mouths on the two sides of the ocean double-well derrick are connected in place and the personnel are in place again, starting to load the well mouths on the two sides of the ocean double-well derrick step by step, wherein the loading process is uniform and slow until the well mouths on the two sides reach the required preset hook load; the data acquisition system sequentially records stress data when each hook is loaded, and inspectors sequentially record corresponding deformation of the derrick body;
and 6, loading the main wellhead to a preset hook load, loading the auxiliary wellhead to a corresponding hook load, slowly unloading to 0KN after the loading is finished, loading the auxiliary wellhead to the preset hook load and enabling the main wellhead to achieve a loading test of the corresponding hook load after a certain time interval, until all test detection items are finished, and outputting test results into a standard test report for a designer to analyze.
As shown in fig. 3, in the test device for the marine double-wellhead derrick load test, the double-wellhead derrick 2 can adopt a six-legged double-wellhead derrick 15 structure, and the method for performing the load test on the double-wellhead loading device 7 has the same specific implementation steps as those of the double-wellhead derrick 2.
As shown in fig. 4, the invention also provides a method for a load test of a land drilling rig on a double wellhead loading device, which is implemented according to the following implementation steps:
step 1, firstly, adjusting a loading beam I9 to the central position of a bearing beam I10 and turning up a loading oil cylinder I8 to keep an upright state; then placing the land drilling rig 16 according to the position;
step 2, placing the land drilling rig 16 on the double-wellhead loading device 7, and carrying out normal assembly and lifting;
step 3, after the land drilling machine 16 is lifted, connecting the main body of the land drilling machine 16 to a loading oil cylinder I8 through a connecting tool 5; meanwhile, the installation of the stress acquisition device of the key measuring point of the drilling machine main body and the coordinate mark of the reference point is finished;
step 4, after the connection of each part is confirmed again and the personnel are in place, the drilling machine starts to be loaded step by step, and the loading process is uniform and slow until the required preset hook load is achieved; the data acquisition system sequentially records stress data when each hook is loaded, and inspectors sequentially record corresponding deformation of the drilling machine main body; and slowly unloading to 0KN after loading is finished until all test detection items are finished and the test results are output to form a standard test report for designers to analyze.
The method for testing the double-wellhead derrick load in the non-offshore platform environment comprises the steps of simulating the stress condition of each part on a derrick main body when two side wellheads simultaneously carry out loading operation under the drilling working condition of the double-wellhead derrick, and recording the variation of each load through a data acquisition system, so that a test basis is provided for the design and calculation of the double-wellhead derrick.

Claims (2)

1. A method for a marine double-wellhead derrick load test is characterized in that a test device for a marine double-wellhead derrick load test is adopted, the test device comprises a double-wellhead derrick (2), a tooling crown block (1) is fixedly installed at the top of the double-wellhead derrick (2), a tooling mounting seat (6) is connected to the bottom of the double-wellhead derrick (2), the tooling mounting seat (6) is fixedly connected with a double-wellhead loading device (7), a traveling block (4) is placed on the center of a wellhead inside the double-wellhead derrick (2), the tooling crown block (1) and the traveling block (4) are connected through a drilling steel wire rope (3), and the lower portion of the traveling block (4) is connected with the double-wellhead loading device (7) through a connecting tooling (5);
the double-wellhead loading device (7) comprises a loading beam I (9) and a loading beam II (12) which are placed on the lower layer of a foundation pit, and a bearing beam I (10) and a bearing beam II (11) which are installed on the upper layer of the foundation pit, wherein the bearing beam I (10) and the bearing beam II (11) are connected into a whole through a pin shaft, and a loading oil cylinder I (8) and a loading oil cylinder II (13) are respectively installed on the loading beam I (9) and the loading beam II (12);
the lower part of the traveling block (4) is connected to the tops of a loading oil cylinder I (8) and a loading oil cylinder II (13) of the double-wellhead loading device (7) through a connecting tool (5);
the tooling crown block (1) comprises a fixed pulley block with an installation base, and the traveling block (4) comprises a movable pulley block;
the bearing beam I (10) is a solid-web steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated by a middle paving table (14); the bearing beam II (11) is a solid web type steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated through a middle laying platform (14); the tool mounting seat (6) is composed of four solid-web steel structural beams; the double-wellhead derrick (2) is of a six-leg double-wellhead derrick (15) structure;
the method is characterized by comprising the following steps:
step 1, adjusting the placing positions of a loading beam I (9) and a loading beam II (12) according to the center distance between two sides of a wellhead of a double-wellhead derrick (2), turning up a loading oil cylinder I (8) and a loading oil cylinder II (13) to keep an upright state, and then installing a tool installation base (6) serving as an ocean platform deck on a wellhead loading device (7);
step 2, installing and fixing the main bodies of the double-wellhead headframes (2) on a tool installation base (6) piece by piece, and installing and fixing the tool crown block (1) on the tops of the double-wellhead headframes (2);
step 3, the drilling steel wire rope (3) penetrates through a pulley block of the tooling crown block (1), bypasses a pulley block of the traveling block (4) and then winds out from a guide pulley at the top of the tooling crown block (1);
step 4, one end of the drilling steel wire rope (3) is fixed on the tool mounting base (6), and the other end of the drilling steel wire rope is slowly lifted after bypassing a beam body of the tool mounting base (6) until the traveling block (4) leaves the ground; connecting the lower part of the traveling block (4) with the top of the loading oil cylinder by using a connecting tool (5), then further lifting the rope head of the drilling steel wire rope (3) until a traveling crane system consisting of the tool crown block (1), the drilling steel wire rope (3) and the traveling block (4) is straightened, and firmly fixing the rope head on the mounting base (6);
step 5, after confirming that all parts of the well mouths on the two sides of the double-well mouth derrick (2) are connected in place and the personnel are in place again, starting to load the well mouths on the two sides of the ocean double-well mouth derrick (2) step by step, wherein the loading process is uniform and slow until the well mouths on the two sides reach the required preset hook load; the data acquisition system sequentially records stress data when each hook is hooked, and inspectors sequentially record corresponding deformation of the derrick body;
and 6, loading the main wellhead to a preset hook load, loading the auxiliary wellhead to a corresponding hook load, slowly unloading to 0KN after the loading is finished, loading the auxiliary wellhead to the preset hook load and enabling the main wellhead to achieve a loading test of the corresponding hook load after a certain time interval, and outputting a standard test report to a designer for analysis until all test detection items are finished.
2. A method for testing the load of a land drilling machine on a double-wellhead loading device adopts a test device for testing the load of an ocean double-wellhead derrick, and comprises a double-wellhead derrick (2), wherein a tooling crown block (1) is fixedly installed at the top of the double-wellhead derrick (2), the bottom of the double-wellhead derrick (2) is connected with a tooling mounting seat (6), the tooling mounting seat (6) is fixedly connected with a double-wellhead loading device (7), a traveling block (4) is placed on the center of a wellhead in the double-wellhead derrick (2), the tooling crown block (1) is connected with the traveling block (4) through a drilling steel wire rope (3), and the lower part of the traveling block (4) is connected with the double-wellhead loading device (7) through a connecting tooling (5);
the double-wellhead loading device (7) comprises a loading beam I (9) and a loading beam II (12) which are placed on the lower layer of a foundation pit, and a bearing beam I (10) and a bearing beam II (11) which are installed on the upper layer of the foundation pit, wherein the bearing beam I (10) and the bearing beam II (11) are connected into a whole through a pin shaft, and a loading oil cylinder I (8) and a loading oil cylinder II (13) are respectively installed on the loading beam I (9) and the loading beam II (12);
the lower part of the traveling block (4) is connected to the tops of a loading oil cylinder I (8) and a loading oil cylinder II (13) of the double-wellhead loading device (7) through a connecting tool (5);
the tooling crown block (1) comprises a fixed pulley block with an installation base, and the traveling block (4) comprises a movable pulley block;
the bearing beam I (10) is a solid-web steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated by a middle paving table (14); the bearing beam II (11) is a solid-web steel structure beam and is composed of two identical beam bodies, the two beam bodies are placed on the upper layer of the pit, and the two beam bodies are separated by a middle paving table (14); the tool mounting seat (6) is composed of four solid-web steel structural beams; the double-wellhead derrick (2) is of a six-leg double-wellhead derrick (15) structure;
the method is characterized by comprising the following steps:
step 1, firstly, adjusting a loading beam I (9) to the central position of a bearing beam I (10) and turning up a loading oil cylinder I (8) to keep an upright state; then placing the land drilling rig (16) according to the position;
step 2, placing the land drilling machine (16) on a double-wellhead loading device (7) and carrying out normal assembly and lifting;
step 3, after the land drilling machine (16) is lifted, connecting the main body of the land drilling machine (16) to a loading oil cylinder I (8) through a connecting tool (5); meanwhile, the installation of the stress acquisition device of the key measuring point of the drilling machine main body and the coordinate mark of the reference point is finished;
step 4, after the connection of each part is confirmed again and the personnel are in place, the drilling machine is loaded step by step, and the loading process is uniform and slow until the required preset hook load is achieved; the data acquisition system sequentially records stress data when each hook is loaded, and inspectors sequentially record corresponding deformation of the drilling machine main body; and slowly unloading to 0KN after loading is finished until all test detection items are finished and outputting test results into a standard test report for a designer to analyze.
CN201910574680.0A 2019-06-28 2019-06-28 Load testing method and testing device for marine double-wellhead derrick Active CN110346217B (en)

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