CN204511429U - A kind of annular pressure measurement mechanism of high temperature high voltage resistant - Google Patents

Abstract

The utility model relates to a high-temperature and high-pressure-resistant annular pressure measurement device, which is tested by placing an annular pressure nipple in a high-temperature autoclave; Inject into the high-temperature autoclave; the heating system and the cooling system are respectively connected with the pressure pipeline of the high-temperature autoclave through the liquid circulation system to form a loop, and the pressure test liquid in the high-temperature autoclave is cyclically heated and radiated; The pressure test liquid in the kettle is boosted. The utility model can test the LWD annular pressure sub-joint, and the annular pressure working index of 185°C and 170Mpa can be achieved, the system works stably, and at the same time, the operation can be simplified, the test efficiency can be improved, and the test cost can be saved.

Description

A high temperature and high pressure resistant annular pressure measuring device

technical field

The utility model relates to a pressure testing device, in particular to a measuring device used for pressure testing of a LWD (logging while drilling) annular space pressure nipple.

Background technique

In the process of drilling and completion, in order to separate different geological formations and prevent the well wall from collapsing due to different formation pressures, one or more layers of casing are required for cementing, and each layer of casing is cemented with cement. The space is filled with annulus protection fluid, and the pressure of the annular space between the casings of each layer is the annular pressure, which is generally called A annulus, B annulus, C annulus, etc., because there may be natural gas or Annulus protection fluid, affected by the temperature during production, expands with heat and contracts with cold, resulting in pressure. Annular pressure control is very important in the development of high-yield and high-pressure natural gas wells. Ultra-high annular pressure may cause casing rupture and natural gas to flow into the surface, resulting in serious blowout accidents. Therefore, it is particularly important to monitor the annular pressure value on site.

Utility model content

The utility model provides a high-temperature and high-pressure-resistant annular pressure measuring device, which can achieve the purpose of testing the annular pressure nipple of LWD (logging while drilling).

In order to achieve the above purpose, the technical solution of the present utility model is to provide a high temperature and high pressure resistant annular pressure measuring device, which includes:

A high-temperature autoclave, inside which is placed an annular pressure joint for testing; the high-temperature autoclave is equipped with a pressure pipeline for circulating the pressure test liquid, and a pressure sensor for collecting pressure data in the high-temperature autoclave;

Liquid circulation system, which connects the pressure pipeline of the high-temperature autoclave and the oil tank of the pressure test liquid to inject the pressure test liquid into the high-temperature autoclave;

The heating system is arranged outside the high-temperature autoclave, and is connected with the pressure pipeline of the high-temperature autoclave to form a loop through the liquid circulation system, and circulates and heats the pressure test liquid in the high-temperature autoclave;

The cooling system, which is arranged outside the high-temperature autoclave, connects with the pressure pipeline of the high-temperature autoclave to form a circuit by connecting the liquid circulation system, and circulates and dissipates the pressure test liquid in the high-temperature autoclave;

The pressure boosting system is connected to the high-temperature autoclave to boost the pressure of the pressure test liquid in the high-temperature autoclave.

Preferably, the high-temperature autoclave is provided with a cylinder body that is integrally forged with alloy steel to withstand a high pressure of 200MPa, and the outer wall of the cylinder body is wrapped with an insulation layer that can withstand a high temperature of 250°C;

The top of the high temperature and autoclave is provided with a quick disassembly plug, which hangs the annular pressure nipple and reads test data through the installed connector, and seals the high temperature and autoclave through the installed O-ring.

Preferably, the high-temperature autoclave is fixed in the pit by a plurality of centralizing blocks respectively arranged above and below it;

The centralizing block above the high temperature and autoclave is further provided with lifting lugs; the quick disassembly plug is further provided with a suspension hook.

Preferably, the liquid circulation system is provided with a circulating oil pump, which communicates with the oil tank of the pressure test liquid through the seventh valve, and communicates with the high-temperature autoclave through the first valve.

Preferably, a safety valve is communicated between the first valve and the high-temperature autoclave.

Preferably, the heating system includes an electric heater, the electric heater is provided with a reciprocating pipeline to increase the heating area, and a resistance wire for heating the pressure test liquid in the reciprocating pipeline;

Wherein, one end of the reciprocating pipeline is connected to the circulating oil pump through the fourth valve, and then connected to the high temperature and autoclave through the first valve of the circulating oil pump; the other end of the reciprocating pipeline is connected to the high temperature and autoclave through the fifth valve.

Preferably, the cooling system includes a cooling tower, which is provided with a reciprocating pipeline that increases the heat dissipation area, and a coolant cylinder for cooling the pressure test liquid in the reciprocating pipeline; by setting a cooling pump, the cooling A loop for cooling liquid circulation is formed between the tower and the water source;

Wherein, one end of the reciprocating pipeline is connected to the circulating oil pump through the second valve, and then connected to the high-temperature autoclave through the first valve of the circulating oil pump; the other end of the reciprocating pipeline is connected to the high-temperature and autoclave through the third valve.

Preferably, the pressurization system includes a pressurization pump communicated with the high-temperature autoclave through the sixth valve, which is controlled by the connected pressurization system integration unit to boost the pressure of the pressure test liquid in the high-temperature autoclave.

The utility model discloses a LWD annular space pressure measuring device, which has the advantages that: the utility model can achieve the function of testing the LWD annular space pressure nipple, and can reach the working index of the annular space pressure of 185°C and 170Mpa, and the system works It is stable, and can simplify operation, improve test efficiency, and save test cost.

Description of drawings

Fig. 1 is the structural representation of medium-temperature autoclave of the present utility model.

Fig. 2 is a schematic diagram of the overall framework of an implementation case of the present invention.

Detailed ways

Below in conjunction with Fig. 1, Fig. 2, a kind of preferred embodiment of the utility model is described in detail.

The utility model provides a LWD (Logging While Drilling, logging while drilling) annular space pressure measuring device, which includes: a high-temperature autoclave 10, a heating system, a cooling system, a liquid circulation system, and a boosting system.

The high-temperature and high-pressure autoclave 10 is used as a high-temperature and high-pressure container for placing annular pressure joints that need to be tested. The top of the high-temperature autoclave 10 is provided with a quick-release plug 11, which can be quickly opened without any tools and is convenient for operation. An O-ring, such as a fluorine rubber O-ring and a polytetrafluoroethylene retaining ring, is installed on the quick disassembly plug 11 to seal the entire container. A connector is also installed on the quick disassembly plug 11, which is used to hang the annular pressure sub-joint and read test data. The quick disassembly plug 11 is further provided with a hook for lifting.

The high-temperature autoclave 10 also includes a high-pressure cylinder body 12, which is integrally forged from high-strength alloy steel, capable of withstanding an internal pressure of 200 MPa, and can be hoisted by a crane or a crane. The outer wall of the high-pressure cylinder 12 is wrapped with an insulating layer 13 for heat preservation, and the insulating layer 13 can withstand a high temperature of 250°C. A pressure pipeline for circulating pressure test liquid and a pressure sensor for collecting pressure data in the cylinder are also installed on the outer wall of the high temperature and autoclave 10 .

The heating system includes an electric heater 1 arranged outside the high-temperature autoclave 10, in which a reciprocating pipeline for increasing the heating area and a resistance wire for heating the pressure test liquid in the reciprocating pipeline are arranged. Both ends of the reciprocating pipeline are connected to the high-temperature autoclave 10 and separated by high-pressure valves.

The cooling system lowers the temperature through cooling liquid circulation and heat dissipation, and includes a cooling tower 2 arranged outside the high-temperature autoclave 10, in which a reciprocating pipeline for increasing the heat dissipation area is provided, and a pressure test liquid in the reciprocating pipeline is provided. The cooled coolant cylinder circulates the coolant between the cooling tower 2 and the water source 4 through the cooling pump 3 . Both ends of the reciprocating pipeline are connected to the high-temperature autoclave 10 and separated by high-pressure valves.

The liquid circulation system includes a circulation oil pump 5 capable of injecting pressure test liquid into the high temperature autoclave 10, for example, a large displacement pump capable of high temperature resistance above 200°C is used. The circulating oil pump 5 communicates with the oil tank 6 of the pressure test liquid through the seventh valve 27 , and also communicates with the high-temperature autoclave 10 through the first valve 21 . A safety valve 9 is connected between the first valve 21 and the high-temperature autoclave 10, the opening pressure is 30000PSI, and the maximum pressure of the system is 35000PSI.

The circulating oil pump 5 can be connected to the heating system to form a loop for the test pressure liquid to circulate between the heating system and the high-temperature autoclave 10 . For example, one end of the reciprocating pipeline of the heating system communicates with the circulating oil pump 5 through the fourth valve 24, and then communicates with the high-temperature autoclave 10 through the first valve 21 of the circulating oil pump 5; the other end of the reciprocating pipeline of the heating system communicates with the high-temperature autoclave through the fifth valve 25 10.

The circulating oil pump 5 can also be connected to the cooling system to form a loop for the test pressure liquid to circulate between the cooling system and the high-temperature autoclave 10 . For example, one end of the reciprocating pipeline of the cooling system communicates with the circulating oil pump 5 through the second valve 22, and then communicates with the high-temperature autoclave 10 through the first valve 21 of the circulating oil pump 5; Kettle 10.

The pressurization system includes a pressurization pump 7 controlled by a pressurization system integration unit 8 for boosting the pressure of the pressure test liquid in the high-temperature autoclave 10; the pressurization pump 7 is connected with the high-temperature autoclave 10, and a (such as the sixth valve 26) separated.

When using the annular pressure measuring device of the present utility model, aiming at the testing technical parameters required by the annular pressure instrument and safety considerations, a pit (in this example, a diameter of 2 meters and a depth of 6 meter round pit). the

The high-temperature autoclave 10 is fixed in the middle of the round pit by four up and down, a total of eight centralizing blocks. The high-temperature autoclave 10 can be lifted out of the well by the lifting lugs of the upper centralizing blocks, and the casing is installed after the waterproof layer is laid in the well. , the outer diameter of the casing is 1.2 meters, and the thickness is 50mm.

An example of the working process of the annular pressure measuring device described in the utility model is as follows:

Lift the instrument (annular pressure joint) that needs to be pressed into the high-temperature autoclave 10 . Open the seventh valve 27, the fourth valve 24, and the fifth valve 25, close the other valves, open the circulating oil pump 5 to inject oil, and inject the pressure test liquid from the oil tank 6 into the high-temperature autoclave 10.

After the oil injection is completed, close the seventh valve 27, open the first valve 21, and turn on the electric heater 1 to start heating the pressure test liquid in the high temperature and autoclave 10.

Close other valves, open the sixth valve 26, and open the pressurizing pump 7 to pressurize the high temperature and autoclave 10 to the required pressure.

Keep the pressure in the high-temperature autoclave 10 heat-preserved, adjust the pressure, read the measurement data of the annular pressure instrument and the pressure in the high-pressure cylinder 12 measured by the sensor.

After the test, the pressure was released to normal pressure.

Close the sixth valve 26, close the pressurizing pump 7; open the first valve 21, the second valve 22, the third valve 23, the circulating oil pump 5, and the cooling pump 3 to carry out the cooling cycle, take out the pressing instrument, and complete the pressure test.

The utility model proves through a large number of tests that the entire system can achieve the function of testing the LWD annular pressure nipple, and can reach the working index of the annular pressure of 185°C and 170Mpa. The system works stably, and at the same time, it can simplify the operation and improve the test efficiency. , saving test cost.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims (8)

1. an annular pressure measurement mechanism for high temperature high voltage resistant, is characterized in that, comprise:

High temperature and high pressure kettle, the annular pressure pipe nipple tested is carried out in inner placement; This high temperature and high pressure kettle is provided with the pressure line making pressure testing liquid-circulating, and gathers the pressure sensor of pressure data in high temperature and high pressure kettle;

Fluid circulation system, it is communicated with the pressure line of high temperature and high pressure kettle and the fuel tank of pressure testing liquid, is injected by pressure testing liquid in high temperature and high pressure kettle;

Heating system, it is arranged in the outside of high temperature and high pressure kettle, to be communicated with and to form loop, carrying out circulating-heating to the pressure testing liquid in high temperature and high pressure kettle by being communicated with fluid circulation system with the pressure line of high temperature and high pressure kettle;

Cooling system, it is arranged in the outside of high temperature and high pressure kettle, to be communicated with and to form loop, carrying out circulation cooling to the pressure testing liquid in high temperature and high pressure kettle by being communicated with fluid circulation system with the pressure line of high temperature and high pressure kettle;

Booster system, it is communicated with high temperature and high pressure kettle, boosts to the pressure testing liquid in high temperature and high pressure kettle.

2. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 1, is characterized in that,

Described high temperature and high pressure kettle is provided with alloy steel solid forging to bear the cylinder body of 200MPa high pressure, and the outer wall of this cylinder body is enclosed with the insulation layer bearing 250 DEG C of high temperature;

The top of described high temperature and high pressure kettle is provided with quickly dismantled plug, and it hangs described annular pressure pipe nipple and read test data by the connector installed, and is sealed high temperature and high pressure kettle by the O type circle installed.

3. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 2, is characterized in that,

Described high temperature and high pressure kettle is fixed in hole by the multiple wiper blocks arranged respectively above and below it;

Wiper block above this high temperature and high pressure kettle is provided with hanger further; Described quickly dismantled plug is provided with suspension hook further.

4. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 1, is characterized in that,

Described fluid circulation system is provided with oil circulating pump, and it is communicated with the fuel tank of pressure testing liquid by the 7th valve, is also communicated with high temperature and high pressure kettle by the first valve.

5. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 4, is characterized in that,

Safety valve is communicated with between first valve and high temperature and high pressure kettle.

6. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 4, is characterized in that,

Described heating system comprises electric heater, is provided with the reciprocal pipeline increasing heating surface (area) (HS in this electric heater, and to the resistance wire that the pressure testing liquid in reciprocal pipeline heats;

Wherein, described reciprocal pipeline one end by the 4th valve communication loop oil pump, and then is communicated with high temperature and high pressure kettle by the first valve of oil circulating pump; The described reciprocal pipeline other end is communicated with high temperature and high pressure kettle by the 5th valve.

7. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 4, is characterized in that,

Described cooling system comprises cooling tower, is provided with the reciprocal pipeline of increasing heat radiation area in this cooling tower, and the cooling fluid cylinder for lowering the temperature to the pressure testing liquid in reciprocal pipeline; By arranging coolant pump, between cooling tower and water source, form the loop making liquid circulation;

Wherein, described reciprocal pipeline one end by the second valve communication loop oil pump, and then is communicated with high temperature and high pressure kettle by the first valve of oil circulating pump; The described reciprocal pipeline other end is communicated with high temperature and high pressure kettle by the 3rd valve.

8. the annular pressure measurement mechanism of high temperature high voltage resistant as claimed in claim 1, is characterized in that,

Described booster system comprises the force (forcing) pump be communicated with high temperature and high pressure kettle by the 6th valve, and the compression system integrated unit that it is connected controls, and makes the pressure testing liquid pressure rise in high temperature and high pressure kettle.