Heavy oil thermal recovery wellhead gas injection blowout preventer
A blowout preventer, heavy oil technology, applied in wellbore/well components, production fluids, earth-moving drilling, etc., can solve problems such as steam loss, increase maintenance costs, scalding, etc., to ensure safety and reduce steam leakage.
Active Publication Date: 2015-04-08
无锡世联丰禾石化装备科技有限公司
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Problems solved by technology
[0002] When crude oil is exploited by thermal recovery of heavy oil, since the crude oil is very viscous at the beginning, the thermal recovery of heavy oil cannot extract the crude oil, and steam must be passed into the crude oil to dilute the crude oil before the oil pumping operation can be carried out. The traditional pumping machine The wellhead is provided with an air inlet to inject gas inward, and the upper end only clamps the sucker rod through the packing of the packing box to realize sealing. This sealing method is very unreliable, and high-pressure steam can easily flow from the packing The gap between the holes and the upper end of the wellhead will not only cause the loss of steam, but also the sudden burst of steam may burn or injure the staff, and the steam impacts the packing for a long time, causing the packing box to be easily damaged and increasing maintenance cost
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[0014] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0015] see figure 1 , the wellhead gas injection blowout prevention device for thermal recovery of heavy oil comprises a wellhead, a packing box 1 and a sucker rod 3, the packing box 1 is installed in the wellhead, and the lower end of the packing box 1 is provided with a screw rod 11 , the screw rod 11 is threadedly connected with a sealing sleeve 2 with an internal thread at the upper end, the joint between the packing box 1 and the sealing sleeve 2 is welded and sealed, and a sucker rod 3 whose uppermost end is close to the wellhead is worn on the In the packing box 1 and the sealing sleeve 2 , both ends of the sucker rod 3 are provided with sucker rod thick ends 31 , and the sucker rod thick ends 31 at the two ends are respectively provided with matching joints. Internal thread and external thr...
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The invention disclose a heavy oil thermal recovery wellhead gas injection blowout preventer which comprises a wellhead, a packing box and oil pumping rods. The packing box is mounted in an inlet. A screw is disposed at the lower end of the packing box. A seal sleeve is connected to the screw. The packing box is welded with a sealing sleeve in a sealed manner. The oil pumping rod at the upmost end and the oil pumping rod at the lower end of the oil pumping rod at the upmost end are connected through an oil pumping rod connector. The upper half section of the oil pumping rod connector is provided with an outer conical face. An inner conical face which is connected with the outer conical face in a matched and clamped manner is disposed inside the seal sleeve. An accommodating cavity for accommodating the big ends of the oil pumping rods is further formed in the seal sleeve. Due to the fact that the seal sleeve welded with the lower end of the packing box in a sealed manner is connected with the oil pumping rod connector in a matched and clamped manner, the packing box is completely sealed, and wellhead gas blowout during gas injection is avoided.
Description
technical field [0001] The invention relates to the field of crude oil extraction equipment, in particular to a gas injection blowout prevention device for heavy oil thermal recovery wellheads. Background technique [0002] When crude oil is exploited by thermal recovery of heavy oil, since the crude oil is very viscous at the beginning, the thermal recovery of heavy oil cannot extract the crude oil. It is necessary to pass steam into the crude oil to dilute the crude oil before the oil pumping operation can be carried out. The traditional pumping machine The wellhead is provided with an air inlet to inject gas inward, and the upper end only clamps the sucker rod through the packing of the packing box to realize sealing. The gap between the holes and the upper end of the wellhead will not only cause the loss of steam, but also the sudden ejection of steam may burn or injure the staff, and the steam impacts the packing for a long time, causing the packing box to be easily dam...
Claims
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IPC IPC(8): E21B33/03E21B43/24
CPCE21B33/06E21B43/24
Inventor 蒋光潭孙月洋迟剑炜汪海洋
Owner 无锡世联丰禾石化装备科技有限公司