CN217813284U

CN217813284U - Long well closing and punching device

Info

Publication number: CN217813284U
Application number: CN202222064381.2U
Authority: CN
Inventors: 刘翠霞; 王立臣; 刘洪俊; 钟彬伟; 李石磊; 李伟泉; 马庆; 张士勇; 郑晓蕾; 王勋
Original assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Current assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-15
Anticipated expiration: 2032-08-05

Abstract

The utility model relates to a long well shut-in trompil device. The problem that a large amount of stratum well liquid overflows and cannot be controlled to have serious safety and environmental protection risks when an oil production well or a water injection well which is closed for a long time and is welded by a blind plate at an existing well mouth is recovered to produce and open a well is mainly solved. The method is characterized in that: the connecting body (4) is cylindrical, and the upper end of the connecting body is connected with an upper fixing sleeve (8) through external threads; the upper fixing sleeve (8) is internally threaded with a fixing ring (9), and the lower end of the fixing ring (9) faces the upper end of the connector (4); a top rod (5) is arranged in the connector (4), a boss is arranged in the middle of the top rod (5), the upper end and the lower end of the top rod are respectively cylindrical, and the diameter of the upper end cylinder is larger than that of the lower end cylinder; the lower part of the mandril (5) is arranged in the central threaded hole at the upper part of the conical needle rod (2). This long well shutting and punching device can effectively control well liquid, and the environmental protection does not have the potential safety hazard, can ensure that the long well shutting opens the well smoothly.

Description

Long well closing and punching device

Technical Field

The utility model relates to an oil field oil recovery technical field, in particular to long well shutting and punching device.

Background

The oil field is in the exploitation in-process, in order to can balance formation pressure, the normal exploitation of the production well of being convenient for, need to close the oil recovery well or the water injection well of well for a long time to resume production sometimes, but these wells are for preventing to steal oil and guaranteeing well head safety when closing the well, and most well heads adopt the blind plate to weld up, when needs are opened the well, because these wells have mostly stopped production for many years and do not use, pressure is unknown in the well, does not have pressure release passageway moreover and has serious safety ring protects the risk.

Disclosure of Invention

The utility model aims to solve the main technical problem that overcome the current well head that exists among the background art and adopt the blind plate to weld the dead problem that the uncontrollable exists serious safety ring protects the risk that exists is spilled over in a large number to the oil recovery well or the water injection well that closes the well for a long time of closing the well when resuming production and opening the well, and provide a long well shut-in trompil device, this long well shut-in trompil device, but effective control well liquid, the environmental protection, no potential safety hazard can ensure that the long well is closed the well smoothly.

The utility model provides a its problem accessible reach as follows technical scheme: the long well shut-in and hole opening device comprises a connector, wherein the connector is cylindrical, and the upper end of the connector is connected with an upper fixing sleeve through external threads; the upper fixed sleeve is internally threaded with a fixed ring, and the lower end of the fixed ring is opposite to the upper end of the connector; a top rod is arranged in the connector, a boss is arranged in the middle of the top rod, the upper end and the lower end of the top rod are respectively cylindrical, and the diameter of the upper end cylinder is larger than that of the lower end cylinder; the lower part of the mandril is arranged in the central threaded hole at the upper part of the conical needle rod.

Preferably, the bottom tip end of the conical needle rod is triangular pyramid, and the outer side body is provided with a longitudinal flow guide groove.

Preferably, the conical needle bar is sleeved with a centralizing body, and the centralizing body is provided with a longitudinal diversion trench.

Preferably, the connecting body is connected with a coupling through a middle side pipe.

Preferably, the centralizing body, the lower part of the mandril and the annular space of the connecting body are communicated with the side pipe in the middle of the connecting body and the connected coupling to form a well fluid outflow channel.

Preferably, the top end of the ejector rod is in a tetragonal shape.

Preferably, the lower end of the connecting body is connected with the lower fixing sleeve.

Preferably, a primary sealing ring and a secondary sealing ring are arranged between the connector and the boss in the middle of the ejector rod.

Preferably, the primary sealing ring is an O-shaped sealing ring; the secondary sealing ring is a V-shaped sealing ring.

Compared with the above background art, the utility model can have following beneficial effect:

this long well closing trompil device, when the oil well or the water injection well that close the well for a long time resume production and open the well, through the balanced principle of pressure conduction, with the bottom welding of device in the sleeve pipe department of sealing of shut-in well or long well closing, then with its clamp department connection valve and hose, then utilize the breakout tongs to carry out the trompil, make well liquid can obtain control and orderly emission after the trompil, safe and reliable. The problem that the environment is seriously polluted due to the fact that personnel are injured and a large amount of oil and water are sprayed out due to overhigh underground pressure is avoided, and the underground oil-water separator is environment-friendly and free of potential safety hazards. The device can safely and controllably open the hole of a well without a pressure relief channel and relieve the pressure for a long time; the hole opening process is mechanical hole opening, open fire is not needed, knocking and impacting sparks are avoided, safety and reliability are achieved, operation is simple and convenient, and smooth well opening of long-time well closing can be guaranteed.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view of the tapered needle bar of the present invention;

FIG. 3 is a perspective view of the centering shaft of the present invention;

fig. 4 is a schematic diagram of the structure of the push rod of the present invention.

In the figure: 1-lower part fixing sleeve; 2-a conical needle bar; 3-body righting; 4-a linker; 5, a top rod;

6-first-stage sealing ring; 7-a secondary sealing ring; 8-upper fixing sleeve; 9-a fixing ring; 10-a coupling; 11-a flow guide groove.

The specific implementation mode is as follows:

the invention will be further explained with reference to the drawings:

as shown in fig. 1 and 2, the long shut-in hole opening device comprises a connecting body 4, wherein the connecting body 4 is cylindrical, and the upper end and the lower end of the connecting body are respectively connected with an upper fixing sleeve 8 and a lower fixing sleeve 1 through external threads; a top rod 5 is arranged in the connecting body 4, as shown in fig. 4, a boss is arranged in the middle of the top rod 5, the upper end and the lower end of the top rod 5 are respectively cylindrical, and the diameter of the upper end cylinder is larger than that of the lower end cylinder; a primary sealing ring 6 and a secondary sealing ring 7 are arranged between the connector 4 and the boss at the middle part of the ejector rod 5; the primary sealing ring 6 is an O-shaped sealing ring; the second-stage sealing ring 7 is a V-shaped sealing ring, the outer diameter of the V-shaped sealing ring is larger than the inner diameter of the cavity in a free state, the inner diameter of the V-shaped sealing ring is smaller than the outer diameter of the connecting body, certain deformation is generated after assembly, due to the action of the sealing ring, the deformation only occurs at the outer edge, pressure is generated at the contact part of the V-shaped sealing ring, even if pressing force is not applied, the inner side can also seal certain internal pressure, and therefore the sealing ring has a self-sealing function, can use as the second-stage sealing ring to completely remove internal pressure loss and prevent leakage; the upper fixing sleeve 8 is internally threaded with a fixing ring 9, the lower end head of the fixing ring 9 is opposite to the upper end head of the connecting body 4, and the fixing ring 9 is used for preventing the ejector rod 5 from rebounding and falling off the top fixing sleeve 8 when the conical needle rod 2 does not burst a blind plate on the sleeve; the lower part of the mandril 5 is arranged in a central threaded hole at the upper part of the conical needle rod 2, and the centralizing body 3 is sleeved outside the conical needle rod 2; as shown in fig. 3, a longitudinal flow guide groove is formed on the righting body 3; the end part of the bottom tip of the conical needle rod 2 is triangular pyramid, and the outer side body is provided with a longitudinal flow guide groove 11 which can be used as an outflow channel of liquid in the well; the top end of the ejector rod 5 is in a square shape and is used for screwing the ejector rod by the pipe wrench; the middle side pipe of the connecting body 4 is connected with a coupling 10 through threads.

The centralizing body 3, the lower part of the mandril 5 and the annular space of the connecting body 4 are communicated with the side pipe in the middle of the connecting body 4 and the connected coupling 10 to form a well fluid outflow channel.

The assembly and the working process of the long shut-in and hole-opening device are as follows:

1. the upper fixing sleeve 8 is in threaded connection with the upper portion of the connecting body 4 and screwed, the fixing ring 9 is in threaded connection with the ejector rod 5, a combination body formed by the fixing ring 9 and the ejector rod 5 is inserted into the combination body formed by the upper fixing sleeve 8 and the connecting body 4 from the upper portion, the external threads of the fixing ring 9 are connected with the internal threads of the upper fixing ring 8 and screwed, the coupling 10 is in threaded connection and fastening with the side pipe of the connecting body 4, and the conical needle ejector rod 2 and the centralizing body 3 are sequentially inserted into the connecting body 4 from the lower portion.

2. And (3) welding the lower fixing sleeve 1 on the long shut-in well casing head, installing the assembled tapping device on the lower fixing sleeve 1, connecting and screwing the lower external thread of the connector 4 and the internal thread of the lower fixing sleeve 1, and connecting the emptying pipeline with the coupling 10.

3. And rotating the ejector rod 5 by using a pipe wrench to enable the ejector rod to move downwards, driving the conical ejector pin 2 to move downwards by the ejector rod 5, enabling a needle head of the conical ejector pin 2 to burst a blind plate at the well mouth of the long shut-in well, enabling liquid in the well to flow out through a flow guide groove on the conical surface of the ejector pin, flow through a gap between the centralizing body and the connecting body 4, and flow into a vent pipeline through a lateral pipe on the connecting body, so that the pressure relief of the long shut-in well is realized.

4. And (3) after the long shut-in well is depressurized, detaching the emptying pipeline, reversely rotating to separate the connector 4 from the lower fixing sleeve 1, detaching the long shut-in well perforating device, and carrying out next operation construction.

The long-shut-in well opening device can safely and controllably open and release pressure for a well without a pressure release channel which is shut down for a long time, mechanical opening is adopted in the opening process, open fire is not used, knocking and impacting sparks are avoided, and the long-shut-in well opening device is safe and reliable; the operation is simple and convenient, and the well can be opened smoothly when the well is closed for a long time.

Claims

1. A long well shut-in tapping device, includes connector (4), its characterized in that: the connecting body (4) is cylindrical, and the upper end of the connecting body is externally threaded and connected with an upper fixing sleeve (8); the upper fixing sleeve (8) is connected with a fixing ring (9) in an internal thread manner, and the lower end head of the fixing ring (9) is opposite to the upper end head of the connecting body (4); a top rod (5) is arranged in the connector (4), a boss is arranged in the middle of the top rod (5), the upper end and the lower end of the top rod are respectively cylindrical, and the diameter of the upper end cylinder is larger than that of the lower end cylinder; the lower part of the mandril (5) is arranged in the central threaded hole at the upper part of the conical needle rod (2).

2. The long shut-in well opening device according to claim 1, wherein: the end part of the bottom tip of the conical needle rod (2) is triangular pyramid, and the outer side body is provided with a longitudinal flow guide groove.

3. The long shut-in well opening device of claim 1, wherein: the conical needle bar (2) is sleeved with a centralizing body (3), and the centralizing body (3) is provided with a longitudinal diversion trench.

4. The long shut-in well opening device of claim 1, wherein: the middle side pipe of the connecting body (4) is connected with a coupling (10).

5. The long shut-in well opening device according to claim 1, 3 or 4, wherein: the lower parts of the centralizing body (3) and the mandril (5) are communicated with the annular space of the connecting body (4), the side pipe in the middle of the connecting body and the connecting hoop (10) connected with the connecting body to form a well fluid outflow channel.

6. The long shut-in well opening device of claim 1, wherein: the top end of the ejector rod (5) is in a tetragonal shape.

7. The long shut-in well opening device according to claim 1, wherein: the lower end of the connector (4) is connected with a lower fixing sleeve (1).

8. The long shut-in well opening device of claim 1, wherein: a primary sealing ring (6) and a secondary sealing ring (7) are arranged between the connector (4) and the boss at the middle part of the ejector rod (5).

9. The long shut-in well opening device according to claim 8, wherein: the primary sealing ring is an O-shaped sealing ring; the second-stage sealing ring is a V-shaped sealing ring.