CN112082785A - Method for evaluating practicability field test of arrow-shaped drilling tool check valve connection device under gas well internal spraying working condition - Google Patents
Method for evaluating practicability field test of arrow-shaped drilling tool check valve connection device under gas well internal spraying working condition Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a method for evaluating the practicability of a flechette drill check valve quick-connection device under the working condition of gas well internal jetting, which comprises the following steps: designing test parameters; risk identification and control measures; gas well treatment, equipment installation and pipeline connection; checking the pressure bearing and the air tightness of the pipeline; artificial internal spraying in a reverse circulation mode; starting a pumping system; observing the water outlet condition of the drilling tool; adjusting the gas and liquid discharge capacity to meet the test requirement; the personnel at the wellhead rob the check valve of the arrow-shaped drilling tool; the first-aid connection is successful; releasing the ejector rod and closing the back pressure valve; after the test is finished, stopping the pump to release pressure and checking a pipeline; the test was completed. The invention can simulate the condition of the internal jetting of the drilling tool in site construction to the greatest extent, and can simulate 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; researching to obtain safe rush-grafting operation time; the device for installing the check valve of the arrow-shaped drilling tool is optimized.
Description
Technical Field
The invention relates to the technical field of well control equipment in a gas field drilling site, in particular to a method for evaluating the practicability of a rocket-type drilling tool check valve grabbing device under the condition of internal blowout of a gas well through a field test.
Background
The well drilling is an important link in the exploration and development process of oil and gas resources, and the blowout refers to the phenomenon that formation fluid continuously gushes into a shaft and is ejected out of the ground without control, and is the most risky accident in the well drilling operation. When the drilling tool internal blowout accident occurs in the gas well drilling construction process, formation gas gushes into the drilling tool and carries drilling fluid to gush out of the ground, at the moment, the non-return valve gun connection operation of the wellhead arrow-shaped drilling tool is needed, and the downhole overflow is stopped by the non-return valve of the arrow-shaped drilling tool to be sprayed out of the drilling tool, so that the blowout accident is prevented.
The method comprises the following steps that a wellhead rocket-shaped drilling tool check valve is subjected to gun connection operation, firstly, the rocket-shaped drilling tool check valve is buckled and connected to a wellhead drill rod through a quick connection device, and then the rocket-shaped drilling tool check valve is rapidly in an effective closing state through releasing a top rod of the quick connection device, so that internal spraying of a drilling tool is prevented.
In the arrow-shaped drilling tool check valve connection process, the huge upward impact force acting on a valve body and a connection device when the inner spraying liquid passes through the arrow-shaped drilling tool check valve needs to be overcome, so that the field connection operation time generally exceeds 5 minutes, the structure of the arrow-shaped drilling tool check valve determines that the inner spraying liquid can erode the valve core and the valve seat when passing through the valve body, the valve core and the valve seat can be stabbed seriously and the arrow-shaped drilling tool check valve cannot be closed effectively, namely, the blowout accident can not be stopped timely and effectively, and serious casualties, property loss and environmental pollution accidents are very easy to cause.
Therefore, under the condition that the drilling tool internal blowout occurs in the drilling process, two key factors exist for realizing quick well closing, whether the first one can quickly and smoothly connect the arrow-shaped drilling tool check valve to the wellhead drill rod is judged, and the second one is to quickly and effectively close the arrow-shaped drilling tool check valve after the connection is successfully realized, so that the drilling tool internal blowout is prevented.
There are problems that:
1. the drilling construction team does not experience the actual drilling tool internal jetting condition to result in incorrect drilling procedure of the arrow-shaped drilling tool check valve;
2. 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 cannot be determined, and the safe rush connection operation time cannot be obtained;
3. the arrow-shaped drilling tool check valve grabbing device cannot be optimized.
However, at present, there is no method for performing a field test on the arrow-shaped drilling tool check valve connection device under the internal jetting working condition of the gas well drilling tool, so it is very important to develop a reasonable and efficient field test flow of the arrow-shaped drilling tool check valve connection device to check the practicability of the arrow-shaped drilling tool check valve connection device.
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 discharge capacity to meet the test requirement
The discharge capacities of the slurry pump and the nitrogen making vehicle are readjusted, so that the internal jet height of the drilling tool meets the test requirement;
(3.5) wellhead personnel robbed-connection arrow-shaped drilling tool check valve
And (3.6) successful or failed in the process of the quick connection.
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.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
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 slurryThe main technical parameters 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 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 (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 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 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 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 (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. 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%;
among them, the main technique of mudThe surgical parameters are: 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 (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, 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 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; 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 modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (12)
1. 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 is characterized by comprising the following steps: the test system comprises a test preparation part, a test connection part, a test process part and a test subsequent part.
2. The method for evaluating the practical field test of the rocket-type drilling tool check valve plugging device under the gas well blowout working condition as claimed in claim 1, wherein the test preparation part comprises 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.
3. The method for evaluating the practicability field test of the flechette tool check valve connection grabbing device under the gas well internal jetting working condition as claimed in claim 1, wherein the test connection part comprises the steps of gas well treatment, equipment installation and pipeline connection and the steps of checking pipeline pressure bearing and airtightness, 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.
4. The method for evaluating the practicability field test of the rocket-type drilling tool check valve quick connection device under the gas well internal spraying working condition as claimed in claim 1, wherein the test process part comprises the steps of reverse circulation mode artificial internal spraying, starting a pumping system, observing the water outlet condition of the drilling tool, adjusting the gas and liquid discharge capacity to meet the test requirement, and quickly connecting the rocket-type drilling tool check valve with wellhead personnel, 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 discharge capacity to meet the test requirement
The discharge capacities of the slurry pump and the nitrogen making vehicle are readjusted, so that the internal jet height of the drilling tool meets the test requirement;
(3.5) wellhead personnel robbed-connection arrow-shaped drilling tool check valve
And (3.6) successful or failed in the process of the quick connection.
5. The method for evaluating the practicability field test of the arrow-shaped drilling tool check valve connection grabbing device under the gas well internal blowout working condition according to claim 1, wherein the subsequent part of the test comprises the steps of successfully grabbing and releasing a mandril, closing a back pressure valve, stopping a pump and releasing pressure, checking a 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.
6. The practical field test evaluation method for the rocket-type drilling tool check valve plugging device under the gas well blowout working condition as claimed in claim 2, characterized in that in the test preparation part, the test medium is formed by mixing slurry and nitrogen, the purity of the nitrogen is 99.9%, and the mixing ratio of the slurry and the nitrogen in the blowout process is 1: 1-1: 2.
7. The practical field test evaluation method for the flechette tool check valve connection grabbing device under the gas well internal flow spraying working condition as claimed in claim 6, wherein the main technical parameters of the slurry are as follows: density of1.3～1.9g/cm3The pH value is 10-11, the viscosity is 48mPa.s, the solid content is 35%, and the sand content is 0.20%.
8. The method for evaluating the practicability field test of the arrow-shaped drilling tool check valve connection grabbing device under the gas well internal flow spraying working condition as claimed in claim 2, is characterized in that the pump stroke range is as follows: 80 times/min to 110 times/min, and the discharge capacity is 2.2Nm3/min。
9. The method for evaluating the practicability of the arrow-shaped drilling tool check valve quick connection device under the gas well internal flow spraying working condition as claimed in claim 1, wherein in the step (3.3), when the drilling tool water hole slurry outlet abnormal condition occurs, the pump is immediately stopped to release pressure, and the pipeline is rechecked.
10. The method for evaluating the practicability of the arrow-shaped drilling tool check valve quick connection device under the gas well blowout working condition according to claim 1, wherein in the step (3.6), when the arrow-shaped drilling tool check valve quick connection fails, the pump is immediately stopped to release pressure, and the pipeline is rechecked.
11. The method for evaluating the practicability of the arrow-shaped drilling tool check valve quick-connection device under the gas well internal blowout working condition as claimed in claim 2, is characterized in that 3 arrow-shaped drilling tool check valves quick-connection devices with different structures are adopted, 4 arrow-shaped drilling tool check valves are adopted, wherein 3 arrow-shaped drilling tool check valves are used for testing, and the other 1 arrow-shaped drilling tool check valve is used for standby.
12. The practical field test evaluation method for the flechette drill check valve connection grabbing device under the gas well internal jetting working condition as claimed in claim 4, wherein the volume of the mud tank is 50m3The slurry pump is an F-1600 type slurry pump, and the number of the slurry pumps is 2.
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