RU2369723C1 - Facility for sprinkling well head equipment at extinguishing open burning well spring - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas production industry. The disclosed facility consists of a vertical collector (VC) and horizontal collector (HC) assembled on a cargo boom of a crane and on its cross-beam. Collectors are connected to pumps of fire engines with flexible hoses. Lengthwise fissures are made on surface of VC facing a well head equipment directed to a well head of the flowing well. Radial holes are made on surface of HC facing the well head equipment directed to the well head of the flowing well; axes of radial holes deviate from axis of HC at an angle. A sprinkling nozzle is arranged on the end of HC. The sprinkling nozzle consists of a case with through axial channels; conic threads are made on both ends of the case. A captive nut with a central through hole is screwed on one end facing the well head equipment directed to the head of the flowing well; a sub interacting with make-and-brake coupling is screwed on the other end; the sprinkling nozzle is connected to HC by means of the make-and-brake coupling.

EFFECT: continuity of extinguishing open burning well springs due to constant sprinkling of well head of flowing well and of well head equipment directed to well head.

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Description

The invention relates to the oil and gas industry, and in particular to devices for irrigation of wellhead equipment induced at the mouth of a gushing well during the liquidation of an open burning fountain.

From the experience of eliminating open burning fountains in oil and gas wells, it is known that the fire extinguishing of a burning fountain is initially carried out and only then they begin work to eliminate an open fountain [Equipment and tools for preventing and eliminating fountains / V.R. Radkovsky, D.V. Rymchuk, Yu.E. Lenkevich, O.A. Blokhin. - M .: Nedra, 1996. - P.142]. However, in this case, fog is inevitable, leading to a complete loss of visibility and hindering the continuity of work, which entails stops in the process of eliminating an open burning fountain, increasing the duration and cost of these works. There is a high probability of spontaneous combustion of liquid hydrocarbons spilled during the gushing of the well after extinguishing the fountain.

Therefore, in the practice of eliminating oil and gas fountains, a rope tooling system is often used to guide wellhead equipment at the mouth of a gushing burning well [RU 2231627 C1, E21B 35/00, publ. 2004.06.27]. In this case, irrigation of the mouth of the gushing well and induced wellhead equipment is carried out using fire carriages. However, upon termination of irrigation of the mouth of the gushing well and induced wellhead equipment, the likelihood of re-ignition of the flame of the open fountain after is high, which can lead to death of people and damage to the induced wellhead equipment and the tap by which it is guided at the mouth of the gushing well.

The challenge in creating the invention is to develop a reliable device that ensures the safe operation of the elimination of open burning fountains in oil and gas wells by irrigating the mouth of a gushing oil and gas well and wellhead equipment induced thereon.

Achievable technical result, which is obtained as a result of the invention, is to ensure the continuity of work on the elimination of open burning fountains due to the constant irrigation of the mouth of the gushing well and wellhead equipment induced thereon.

The task and the technical result are achieved by the fact that in the device for irrigation of wellhead equipment containing vertical and horizontal collectors located on the crane's boom and on its traverse, the collectors are made with the possibility of connection via flexible hoses with pumps of fire engines on the outer surface of the vertical collector facing the wellhead equipment being directed at the mouth of the gushing well, longitudinal slotted holes are made, and a plug is placed at its end on the outer surface of the horizontal collector, facing the wellhead equipment pointing at the mouth of the gushing well, radial holes are made with an angle of deviation of their axes from the axis of the horizontal collector, and an irrigation nozzle is placed at its end, while the irrigation nozzle contains a housing with through axial channels , at both ends of the body tapered threads are made, one of the threads facing the wellhead equipment pointing at the mouth of the gushing well, a union nut with with a central through hole, a sub is screwed onto another thread, interacting with a quick-connect, through which the device is connected to a horizontal collector.

Figure 1 shows the layout of the inventive device on the cargo boom of the crane and on its traverse during the elimination of an open burning fountain, figure 2 is a fragment of a vertical collector (end section), figure 3 is a fragment of a horizontal collector (with irrigation nozzle), figure 4 is a section of a horizontal collector (in section aa), figure 5-6 is a section of the irrigation nozzle (sections bb and bb).

The device consists of vertical 1 and horizontal 2 collectors, which are, for example, hollow cylinders or pipes of small diameter.

The vertical collector 1 is placed on the cargo boom of the crane or frame 3 of the tractor (as shown in figure 1). On its surface facing the mouth of the gushing well 4, slotted holes 5 are made, and a plug 6 is placed at the end.

The horizontal collector 2 is placed on the traverse 7, which is suspended on the cargo boom of the crane or frame 3 of the tractor using slings 8. On its surface facing the direction of the wellhead equipment 9 directed at the mouth of the gushing well 4, radial holes 10 are made, and at its end face irrigation nozzle 11. Radial holes 10 are made at an angle of 45 ° to the axis of the horizontal manifold 2.

The irrigation nozzle 11 comprises a housing with through axial channels 12. Cone threads are made at both ends of the housing. A flare nut 13 with a central through hole 14 is screwed onto one end of the casing, facing the wellhead equipment 9, which is being guided at the mouth of the gushing well, and an adapter 15 is connected to the other, which interacts with the quick disconnect 16, through which the irrigation nozzle 11 is connected to the horizontal collector 2 .

Vertical 1 and horizontal 2 collectors are connected by means of flexible pressure hoses 17 to the pumps of fire engines 18.

The device operates as follows.

First, a vertical collector 1 is mounted on the crane's boom or tractor frame 3, and a horizontal collector 2 is mounted on the beam 7. After installing the vertical 1 and 2 horizontal collectors and the suspension on the beam 7 of the wellhead equipment 9 directed at the mouth of the gushing well 4, the crane or tractor begins to move with frame 3 to the mouth of the gushing well 4. When approaching the mouth of the gushing well 4, irrigation of the suspension suspension of the load boom of the crane or tractor frame with coolant through slotted holes 6 into vertical collector 1. Irrigation of wellhead equipment 9 induced at the mouth of the gushing well is carried out through the radial holes 10 of the horizontal collector 2. Irrigation of the mouth of the gushing well 5 is carried out through the central through hole 14 of the irrigation nozzle 11.

When pointing the wellhead equipment 9 at the mouth of the gushing well 4, irrigation of the rope equipment of the crane (tractor) 3 and the mouth of the gushing well 5 continue to irrigate with coolant.

The constant irrigation of the rope equipment during the guidance of the replaceable wellhead equipment 9 prevents possible burnout of the ropes under the influence of a flame, the fall of the traverse and the replaceable wellhead equipment 9 assembled with a branch pipe 19. The irrigation of these sections of the cable equipment, and not the entire territory of the well, does not create conditions for fog preventing the elimination of an open burning fountain.

After full replacement of the wellhead equipment 9 being drilled at the mouth of the gushing well 5, the flame stream through the branch pipe 18 rises above the wellhead to a safe height. After that, the irrigation of the rope equipment is stopped and the traverse 7 is disconnected from the wellhead equipment 9 assembled at the mouth of the gushing well and with a branch pipe 18. The crane or tractor with a frame 3 is tapped from the mouth of the gushing well 5.

Then proceed to killing the well by a known method. For example, a kill fluid (drilling fluid or technological solution) of appropriate density is pumped into the well, if necessary, an additional blocking of the productive formation from the penetration of filtrates of the drilling fluid or technological solution is carried out.

Collectors 1 and 2 can be made of steel pipe with a nominal diameter of 50 mm, and longitudinal slots can be made with a size of 5 × 30 mm, radial holes with a diameter of 5 mm. Other sizes of collectors are possible, but when liquidating an open burning fountain at the Urengoyskoye field, collectors of precisely such sizes were used.

The proposed device is more reliable compared to traditional fire monitors used in the elimination of open fountains, as it eliminates the occurrence of fog and loss of visibility on the territory of the work. It provides a safer work to eliminate the fountain itself, as it eliminates the risk of spontaneous combustion of liquid hydrocarbons spilled on the mouth and in the area near the mouth. Unpredictable and unforeseen spontaneous combustion of liquid hydrocarbons, in particular gas condensate, can lead to death of people, destruction of machinery and equipment. Among other things, this method reduces the amount of water and other cooling fluid consumed for irrigating the territory of the bush.

Claims (2)

1. A device for irrigation of wellhead equipment during the elimination of an open burning fountain, containing vertical and horizontal collectors located on the crane's cargo boom and on its traverse, the collectors are made with the possibility of connection via flexible pressure hoses with pumps of fire engines on the outer surface of the vertical manifold facing in the direction of the wellhead equipment induced at the mouth of the gushing well, longitudinal slotted holes are made, and a plug is placed at its end, on the outside radial holes with an angle of deviation of their axes from the axis of the horizontal collector, and an irrigation nozzle is placed at its end face. 2. The device according to claim 1, characterized in that the irrigation nozzle contains a housing with through axial channels, conical threads are made at both ends of the housing, one end screw with a central through nut is screwed at one end facing the wellhead equipment pointing at the mouth of the gushing well. with a hole, an adapter is screwed onto the other end, interacting with a quick-connect, through which the device is connected to a horizontal collector.

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