Disclosure of Invention
In order to solve the technical problem, the invention discloses a method for evaluating the practicability field test of an arrow-shaped drilling tool check valve connection device under the gas well internal spraying working condition.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for evaluating the practicability field test of an arrow-shaped drilling tool check valve connection device under the condition of gas well internal spraying comprises the following steps: the test system comprises a test preparation part, a test connection part, a test process part and a test subsequent part.
As a further preferred aspect of the present invention, the test preparation section includes a test parameter design step and a risk identification and control measure step, wherein:
(1.1) design of test parameters
Selecting arrow-shaped drilling tool check valves, arrow-shaped drilling tool check valve quick-connection devices and drill rods which meet test conditions; determining the parameters of the drilling fluid to be tested and the internal jetting height of the drilling tool, and then calculating to obtain the discharge capacity of a slurry pump and a nitrogen making vehicle;
(1.2) Risk identification and control measures
And (4) carrying out safety risk identification before the test, and making corresponding emergency treatment measures.
As a further preferred aspect of the present invention, the test connection section comprises a gas well treatment, equipment installation and pipeline connection step and a step of checking the pressure and airtightness of the pipeline, wherein:
(2.1) gas well treatment, equipment installation and pipeline connections
Before the test, a cement plug is used for sealing the oil-gas layer, so that no well control safety risk is ensured; the wellhead blowout preventer can effectively close the well, the drilling machine equipment normally operates, and the condition of rob connection of the check valve of the arrow-shaped drilling tool under the working condition of tripping up and tripping down is achieved;
A drilling pump pipeline and a nitrogen vehicle pipeline are connected in parallel on a manifold through instrument flanges, a slurry pump is connected with the manifold through a high-pressure hose, and the slurry pump is connected with a slurry tank in a hard connection mode;
the drilling mud pump, the power system, the manifold and the blowout pipeline are fixed by adopting a cement-based pier or an expansion bolt and a clamping plate, the pipeline and the equipment are supported in the suspension position, and then the pipeline is connected into a kill line;
(2.2) checking the pressure-bearing and gas-tightness of the pipeline
And stabilizing the pressure for 10min to determine whether the pipeline meets the safety test requirements.
As a further optimization of the invention, the testing process part comprises a reverse circulation mode artificial internal spraying step, a pumping system starting step, a drilling tool water outlet condition observing step, a gas and liquid discharge capacity adjusting step which meets the test requirement, and a wellhead personnel rob-connecting arrow-shaped drilling tool check valve step, wherein:
(3.1) reverse circulation Artificial internal spray
The semi-closed blowout preventer is closed under the condition that a drilling tool exists in the well, liquid is pumped by using a slurry pump, enters a kill manifold through a kill pipeline, enters a drill rod water hole from the annulus through an internal control gate to spray out a drill rod, and internal spraying of the drilling tool is simulated;
(3.2) starting the Pumping System
Starting a slurry pump to slowly inject the drilling fluid into a kill line, starting the pump at a small displacement of gas and liquid phases until the drilling fluid returns out of a wellhead drill rod, and closing the slurry pump;
(3.3) observing the water outlet condition of the drilling tool
The slurry pump is started again by using the small displacement, and the slurry outlet condition of the water hole of the drilling tool is observed;
(3.4) adjusting the gas and liquid displacement to meet the test requirements
The discharge capacities of a slurry pump and a nitrogen making vehicle are readjusted, so that the internal spraying height of the drilling tool meets the test requirement;
(3.5) the personnel at the well head rob the check valve of the arrow drilling tool
And (3.6) successful robbing or failed robbing.
As a further optimization of the invention, the subsequent part of the test comprises the steps of successfully releasing the mandril in a rush connection mode, closing the back pressure valve, stopping the pump for pressure relief, checking the pipeline and completing the test, wherein:
(4.1) releasing the mandril and closing the back pressure valve
After the check valve of the arrow-shaped drilling tool is successfully connected, the top rod of the connecting device is released to close the check valve of the arrow-shaped drilling tool;
(4.2) end of test, stop pump and release pressure, check pipeline
Stopping the slurry pump and the nitrogen making vehicle set, and starting a slurry pump safety valve and a nitrogen emptying valve to release pressure; after the pressure relief is finished, checking the pipeline;
(4.3) completion of the test
And (5) completing one test, and repeating the steps to perform the next test.
As a further preference of the invention, in the test preparation part, the test medium is mixed by slurry and nitrogen, the purity of the nitrogen is 99.9%, and the mixing ratio of the slurry and the nitrogen is 1: 1-1: 2 in the blowout process.
As a further preferred aspect of the invention, the main technical parameters of the slurry are: the density is 1.3 to 1.9g/cm3The pH value is 10-11, the viscosity is 48mPa.s, the solid content is 35%, and the sand content is 0.20%.
As a further preference of the invention, the pumping range is: 80 times/min to 110 times/min, and the discharge capacity is 2.2Nm3/min。
As a further preferred aspect of the present invention, in step (3.3), when the abnormal condition of slurry discharge of the water hole of the drilling tool occurs, the pump is immediately stopped to release the pressure, and the pipeline is checked again.
As a further preferred of the invention, in the step (3.6), when the check valve of the arrow-shaped drilling tool fails to be seized, the pump is immediately stopped for pressure relief, and the pipeline is rechecked.
As a further optimization of the invention, 3 arrow-shaped drilling tool check valve grabbing devices with different structures are provided, 4 arrow-shaped drilling tool check valves are provided, wherein 3 arrow-shaped drilling tool check valves are used for testing, and the other 1 arrow-shaped drilling tool check valve grabbing device is standby.
As a further preferred aspect of the present invention, the mud tank has a volume of 50m3The slurry pump is an F-1600 type slurry pump, and the number of the slurry pumps is 2.
The beneficial effect of the invention is that,
1. the invention can simulate the condition of the internal jetting of the drilling tool in site construction to the greatest extent, and can obtain accidents with different severity degrees by setting different test parameters, thereby providing correct and effective arrow-shaped drilling tool check valve rush connection procedures for site construction personnel;
2. Determining the influence degree of the erosion phenomenon of the check valve of the arrow-shaped drilling tool on the blowout prevention performance of the check valve of the arrow-shaped drilling tool caused by different gun connection time under different internal spraying conditions through field tests, and obtaining safe rush connection operation time through research;
3. the device for installing the check valve of the arrow-shaped drilling tool is optimized.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Example 1
Test equipment
1. The arrow-shaped drill check valves are 4, wherein 3 are tested and 1 is reserved;
2. the arrow-shaped drilling tool check valve quick-connection device with different structures is 3;
3. mud tank 50m32 mud pumps of the F-1600 mud pump type;
4. 2 sets of nitrogen making vehicles;
5. a test well and a test wellhead manifold;
6. three sets of on-site air-tight sealing detection vehicles;
7. test site power equipment and electrical pipelines;
8. high-pressure nitrogen pipeline, high-pressure slurry pipeline, exhaust pipeline, slurry return pipeline, accessory sealing joint and the like;
9. The positive pressure air respirator, the goggles and the raincoat are provided.
Second, test materials
The test medium is formed by mixing slurry and nitrogen, and the purity of the nitrogen is 99.9%;
wherein, the main technical parameters of the slurry are as follows: density 1.9g/cm3The pH value is 11, the viscosity is 48mPa.s, the solid content is 35 percent, and the sand content is 0.20 percent;
controlling the pump stroke at 80 times/min to 100 times/min and the discharge capacity at 2.2Nm3/min。
In the blowout process, the mixing ratio of the slurry and the nitrogen is 1: 1.5.
Third, test method flow
A method for evaluating the practicability field test of an arrow-shaped drilling tool check valve connection device under the condition of gas well internal spraying specifically comprises the following steps:
(1) design of test parameters
Selecting an arrow-shaped check valve of the drilling tool;
3 arrow-shaped drilling tool check valve rush-connection devices with the size of 5-1/2;
the inner diameter of the well casing is phi 168.3 mm;
the drill rod is 5-1/2 short drill rods of S135 steel grade, and the inner diameters of the female joints are 76.2mm and 88.9mm respectively;
the inner spraying height of the drilling tool is 3 m.
(2) Risk identification and control measures
And (4) carrying out safety risk identification before the test, and making corresponding emergency treatment measures.
(3) Gas well treatment, equipment installation and pipeline connections
Before the test, cement plugs are respectively arranged at a well section 6451-; the wellhead blowout preventer can effectively close the well, the drilling machine equipment normally operates, and the condition of rob connection of the check valve of the arrow-shaped drilling tool under the working condition of tripping up and tripping down is achieved;
A drilling pump pipeline and a nitrogen vehicle pipeline are connected in parallel on a manifold through instrument flanges, a slurry pump is connected with the manifold through a high-pressure hose, and the slurry pump is connected with a slurry tank in a hard connection mode;
the drilling mud pump, the power system, the manifold and the blowout pipeline are fixed by adopting a cement-based pier or an expansion bolt and a clamping plate, and the pipeline and the suspended part of the equipment are supported; and then connected into a kill line.
(4) Checking pipeline pressure bearing and air tightness
The pipeline is 38MPa, the pressure is stabilized for 10min, the pressure drop is less than 0.1MPa, and the leakage phenomenon does not occur, which indicates that the safety test requirements are met;
(5) reverse circulation type artificial internal spraying
And (3) closing the semi-closed blowout preventer under the condition that a drilling tool is arranged in the well, pumping liquid by using a slurry pump, entering a kill manifold through a kill pipeline, entering a drill rod water hole from the annulus through an internal control gate, and ejecting the drill rod to simulate the internal blowout of the drilling tool.
(6) Starting a pumping system
And starting a mud pump to slowly inject the drilling fluid into a kill line, starting the pump at a small displacement of the gas phase and the liquid phase until the drilling fluid returns out of the wellhead drill rod, and closing the mud pump.
(7) Observing the water outlet condition of the drilling tool
The slurry pump is started again by using the small displacement, and the slurry outlet condition of the water hole of the drilling tool is observed; when the drilling tool water hole slurry outlet abnormal condition occurs, the pump is immediately stopped to release the pressure, and the pipeline is checked again.
(8) Adjusting the gas and liquid discharge capacity to meet the test requirement
And the discharge capacities of the slurry pump and the nitrogen making vehicle are readjusted, so that the internal jet height of the drilling tool reaches 3m to meet the test requirement.
(9) Check valve of rocket-shaped drilling tool for well head personnel to rob and connect
(10) Success of first-aid grafting
When the check valve of the arrow-shaped drilling tool fails to be seized, the pump is immediately stopped to release the pressure, and the pipeline is rechecked.
(11) Releasing the ejector pin and closing the back pressure valve
After the arrow-shaped drilling tool check valve is successfully connected, the top rod of the connecting device is released to close the arrow-shaped drilling tool check valve.
(12) After the test is finished, the pump is stopped to release pressure, and the pipeline is checked
Stopping the slurry pump and the nitrogen making vehicle set, and starting a slurry pump safety valve and a nitrogen emptying valve to release pressure; after the pressure relief is completed, the pipeline is inspected.
(13) Completion of the test
And (5) completing one test, and repeating the steps to perform the next test.
Example 2
Test equipment
1. The arrow-shaped drill check valves are 4, wherein 3 are tested and 1 is reserved;
2. the arrow-shaped drilling tool check valve quick-connection device with different structures is 3;
3. mud tank 50m3,F-1600 mud pump type mud pumps 2;
4. 2 sets of nitrogen making vehicles;
5. a test well and a test wellhead manifold;
6. three sets of on-site air-tight sealing detection vehicles;
7. test site power equipment and electrical pipelines;
8. high-pressure nitrogen pipeline, high-pressure slurry pipeline, exhaust pipeline, slurry return pipeline, accessory sealing joint and the like;
9. The positive pressure air respirator, the goggles and the raincoat are provided.
Second, test materials
The test medium is formed by mixing slurry and nitrogen, and the purity of the nitrogen is 99.9%;
wherein, the main technical parameters of the slurry are as follows: density 1.9g/cm3The pH value is 11, the viscosity is 48mPa.s, the solid content is 35 percent, and the sand content is 0.20 percent;
controlling the pump stroke at 100 times/min-110 times/min and the displacement at 2.2Nm3/min。
In the blowout process, the mixing ratio of the slurry and the nitrogen is 1: 1.5.
Third, test method flow
A method for evaluating the practicability field test of an arrow-shaped drilling tool check valve connection device under the condition of gas well internal spraying specifically comprises the following steps:
(1) design of test parameters
Selecting an arrow-shaped check valve of the drilling tool;
3 arrow-shaped drilling tool check valve rush-connection devices with the size of 5-1/2;
the inner diameter of the well casing is phi 168.3 mm;
the drill rod is 5-1/2 short drill rods of S135 steel grade, and the inner diameters of the female joints are 76.2mm and 88.9mm respectively;
the inner spraying height of the drilling tool is 2 m.
(2) Risk identification and control measures
And (4) carrying out safety risk identification before the test, and making corresponding emergency treatment measures.
(3) Gas well treatment, equipment installation and pipeline connections
Before the test, cement plugs are respectively arranged at a well section 6451-; the wellhead blowout preventer can effectively close the well, the drilling machine equipment normally operates, and the condition of rob connection of the check valve of the arrow-shaped drilling tool under the working condition of tripping up and tripping down is achieved;
A drilling pump pipeline and a nitrogen vehicle pipeline are connected in parallel on a manifold through instrument flanges, a slurry pump is connected with the manifold through a high-pressure hose, and the slurry pump is connected with a slurry tank in a hard connection mode;
the drilling mud pump, the power system, the manifold and the blowout pipeline are fixed by adopting a cement-based pier or an expansion bolt and a clamping plate, and the pipeline and the suspended part of the equipment are supported; and then connected into a kill line.
(4) Checking pipeline pressure bearing and air tightness
The pipeline is 38MPa, the pressure is stabilized for 10min, the pressure drop is less than 0.1MPa, and the leakage phenomenon does not occur, which indicates that the safety test requirements are met;
(5) reverse circulation type artificial internal spraying
And (3) closing the semi-closed blowout preventer under the condition that a drilling tool is arranged in the well, pumping liquid by using a slurry pump, entering a kill manifold through a kill pipeline, entering a drill rod water hole from the annulus through an internal control gate, and ejecting the drill rod to simulate the internal blowout of the drilling tool.
(6) Starting a pumping system
And starting a mud pump to slowly inject the drilling fluid into a kill line, starting the pump at a small displacement of the gas phase and the liquid phase until the drilling fluid returns out of the wellhead drill rod, and closing the mud pump.
(7) Observing the water outlet condition of the drilling tool
The slurry pump is started again by using the small displacement, and the slurry outlet condition of the water hole of the drilling tool is observed; when the drilling tool water hole slurry outlet abnormal condition occurs, the pump is immediately stopped to release the pressure, and the pipeline is checked again.
(8) Adjusting the gas and liquid discharge capacity to meet the test requirement
And the discharge capacities of the slurry pump and the nitrogen making vehicle are readjusted, so that the internal spraying height of the drilling tool, 2m, meets the test requirement.
(9) Check valve of rocket-shaped drilling tool for well head personnel to rob and connect
(10) Success of first-aid grafting
When the check valve of the arrow-shaped drilling tool fails to be seized, the pump is immediately stopped to release the pressure, and the pipeline is rechecked.
(11) Releasing the ejector pin and closing the back pressure valve
After the arrow-shaped drilling tool check valve is successfully connected, the top rod of the connecting device is released to close the arrow-shaped drilling tool check valve.
(12) After the test is finished, the pump is stopped to release pressure, and the pipeline is checked
Stopping the slurry pump and the nitrogen making vehicle set, and starting a slurry pump safety valve and a nitrogen emptying valve to release pressure; after the pressure relief is completed, the pipeline is inspected.
(13) Completion of the test
And (5) completing one test, and repeating the steps to perform the next test.
Example 3
Test equipment
1. The arrow-shaped drill check valves are 4, wherein 3 are tested and 1 is reserved;
2. the arrow-shaped drilling tool check valve quick-connection device with different structures is 3;
3. mud tank 50m32 mud pumps of the F-1600 mud pump type;
4. 2 sets of nitrogen making vehicles;
5. a test well and a test wellhead manifold;
6. three sets of on-site air-tight sealing detection vehicles;
7. test site power equipment and electrical pipelines;
8. a high-pressure nitrogen pipeline, a high-pressure slurry pipeline, an exhaust pipeline, a slurry return pipeline, an auxiliary sealing joint and the like;
9. The positive pressure air respirator, the goggles and the raincoat are provided.
Second, test materials
The test medium is formed by mixing slurry and nitrogen, and the purity of the nitrogen is 99.9%;
wherein, the main technical parameters of the slurry are as follows: density 1.9g/cm3The pH value is 11, the viscosity is 48mPa.s, the solid content is 35 percent, and the sand content is 0.20 percent;
controlling the pump stroke at 80 times/min to 90 times/min and the discharge capacity at 2.2Nm3/min。
In the blowout process, the mixing ratio of the slurry and the nitrogen is 1: 1.5.
Third, test method flow
A method for evaluating the practicability field test of an arrow-shaped drilling tool check valve connection device under the condition of gas well internal spraying specifically comprises the following steps:
(1) design of test parameters
Selecting an arrow-shaped check valve of the drilling tool;
3 arrow-shaped drilling tool check valve rush-connection devices with the size of 5-1/2;
the inner diameter of the well casing is phi 168.3 mm;
the drill rod is 5-1/2 short drill rods of S135 steel grade, and the inner diameters of the female joints are 76.2mm and 88.9mm respectively;
the inner spraying height of the drilling tool is 1 m.
(2) Risk identification and control measures
And (4) carrying out safety risk identification before the test, and making corresponding emergency treatment measures.
(3) Gas well treatment, equipment installation and pipeline connections
Before the test, cement plugs are respectively arranged at a well section 6451-; the wellhead blowout preventer can effectively close the well, the drilling machine equipment normally operates, and the condition of rob connection of the check valve of the arrow-shaped drilling tool under the working condition of tripping up and tripping down is achieved;
A drilling pump pipeline and a nitrogen vehicle pipeline are connected in parallel on a manifold through instrument flanges, a slurry pump is connected with the manifold through a high-pressure hose, and the slurry pump is connected with a slurry tank in a hard connection mode;
the drilling mud pump, the power system, the manifold and the blowout pipeline are fixed by adopting a cement-based pier or an expansion bolt and a clamping plate, and the pipeline and the suspended part of the equipment are supported; and then connected into a kill line.
(4) Checking pressure bearing and air tightness of pipeline
The pipeline is 38MPa, the pressure is stabilized for 10min, the pressure drop is less than 0.1MPa, and the leakage phenomenon does not occur, which indicates that the safety test requirements are met;
(5) reverse circulation type artificial internal spraying
And closing the semi-closed blowout preventer under the condition that a drilling tool exists in the well, pumping liquid by using a mud pump, entering a kill manifold through a kill pipeline, entering a drilling rod water hole from the annular space through an internal control gate, and ejecting the drilling rod to simulate the internal jetting of the drilling tool.
(6) Starting a pumping system
And starting a slurry pump to slowly inject the drilling fluid into a kill line, starting the pump at a small displacement of the gas phase and the liquid phase until the drilling fluid returns out of the well mouth drill rod, and closing the slurry pump.
(7) Observing the water outlet condition of the drilling tool
The slurry pump is started again by using the small displacement, and the slurry outlet condition of the water hole of the drilling tool is observed; when the abnormal condition of slurry outlet of the water hole of the drilling tool occurs, the pump is immediately stopped to release the pressure, and the pipeline is checked again.
(8) Adjusting the gas and liquid displacement to meet the test requirements
And the discharge capacities of the slurry pump and the nitrogen making vehicle are readjusted, so that the internal spraying height of the drilling tool, namely 1m, meets the test requirement.
(9) Check valve of rocket-shaped drilling tool for well head personnel to rob and connect
(10) Success of first-aid grafting
When the check valve of the arrow-shaped drilling tool fails to be seized, the pump is immediately stopped to release the pressure, and the pipeline is rechecked.
(11) Releasing the ejector pin and closing the back pressure valve
After the arrow-shaped drilling tool check valve is successfully connected, the top rod of the connecting device is released to close the arrow-shaped drilling tool check valve.
(12) After the test is finished, the pump is stopped to release pressure, and the pipeline is checked
Stopping the slurry pump and the nitrogen making vehicle set, and starting a slurry pump safety valve and a nitrogen emptying valve to release pressure; after the pressure relief is completed, the pipeline is inspected.
(13) Completion of the test
And (5) completing one test, and repeating the steps to perform the next test.
The invention can simulate the condition of the internal jetting of the drilling tool in site construction to the greatest extent, and can obtain accidents with different severity degrees by setting different test parameters, thereby providing correct and effective arrow-shaped drilling tool check valve rush connection procedures for site construction personnel; determining the influence degree of erosion phenomena of the check valve of the arrow-shaped drilling tool on the blowout prevention performance of the check valve of the arrow-shaped drilling tool caused by different gun connection time under different internal spraying conditions through field tests, and researching to obtain the safe connection preemptive operation time; in addition, the optimization of the arrow-shaped drilling tool check valve grabbing device is realized.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.