CN201874516U

CN201874516U - Sectional well completion packer for thermal production of heavy oil wells

Info

Publication number: CN201874516U
Application number: CN2010206173001U
Authority: CN
Inventors: 王爱国; 孙庆永
Original assignee: DONGYING YOUJIA PETROLEUM MACHINERY Co Ltd
Current assignee: DONGYING YOUJIA PETROLEUM MACHINERY Co Ltd
Priority date: 2010-11-13
Filing date: 2010-11-13
Publication date: 2011-06-22
Anticipated expiration: 2020-11-13

Abstract

The utility model relates to a sectional well completion packer for the thermal production of heavy oil wells. The technical scheme of the utility model is that: the packer mainly comprises an upper connector, a central pipe, hydraulic cylinders, expandable material, thrust rings, locking rings, fixing bolts, compression rings, high-temperature seals and a rubber barrel support, one end of the central pipe is connected with the upper connector, the other end of the central pipe is provided with a male casing screw, the hydraulic cylinders are movably connected with the outer walls of both ends of the central pipe, the expandable material is mounted between the hydraulic cylinders and the central pipe, each thrust ring is arranged at one end of a hydraulic cylinder, the thrust rings are connected with the compression rings through the fixing bolts, the high-temperature seals and the rubber barrel support are arranged at the middle of the central pipe, the high-temperature seals are made of polytetrafluoroethylene composite material, and the locking rings are respectively arranged in the thrust rings on both ends of the central pipe, and are connected with the central pipe through locking screw threads to stop the backward motion of the compression rings. The utility model has the advantages that: the packer can remarkably improve the quality of the cementation and completion of oil wells, gas wells and water wells, the tool is easy to operate, the performance is reliable, the adaptability is high, and therefore the packer is an importation well completion tool.

Description

Heavy oil wells thermal recovery segmentation completion packer

One, technical field:

The utility model relates to a kind of oil-field thick-oil well equipment, particularly a kind of heavy oil wells thermal recovery segmentation completion packer.

Two, background technology:

At present, the screen casing problem that completion exists of not cementing the well is under the oilfield horizontal well oil reservoir, existing packer lost efficacy under hot conditions easily, undesirable to oil, gas, water layer packing effect, can't carry out workover treatment after the early stage water logging of oil-gas Layer, exist between oil, gas, the water layer and scurry phenomenon mutually, thereby shortened the life-span of oil gas well.

Three, summary of the invention:

The purpose of this utility model is exactly the above-mentioned defective that exists at prior art, a kind of heavy oil wells thermal recovery segmentation completion packer is provided, can realize that the section of going into the well annular space is isolated fully on the external casing packer, can effectively prevent to scurry mutually between oil, gas, the water layer, thus the life-span of having improved the oil gas well.

Its technical scheme is: mainly by top connection, central tube, fluid cylinder, expanding material, throw-out collar, lock ring, staple, extrusion ring, elevated-temperature seal part and packing element bearing are formed, one end of described central tube connects top connection, the other end is provided with the sleeve pipe pin thread, the both sides outer wall of described central tube flexibly connects fluid cylinder, between fluid cylinder and central tube, expanding material is housed, one side of fluid cylinder is provided with throw-out collar, throw-out collar is connected by staple with extrusion ring, the centre of described central tube is provided with elevated-temperature seal part and packing element bearing, the elevated-temperature seal part adopts poly-tetrafluoro composite material to make, be respectively equipped with lock ring in the throw-out collar of central tube both sides, adopt locking screw to be connected with central tube and stop extrusion ring to retreat, when temperature was elevated to 150 ℃, expanding material began to expand, promote the distortion of upper-lower seal part, shutoff the annular space between sleeve pipe and the well.

Above-mentioned fluid cylinder screw thread end leaves step, processing step on the described central tube, and two steps form spacing.

The beneficial effects of the utility model are: be mainly used in complicated oil, gas, the well completion engineering, to realize the down-hole segmentation completion and the exploitation of various purposes, the well cementation completion quality of improving oil, gas, well there is remarkable effect, this tool operation is easy, dependable performance, compliance are strong, is a kind of important completion tool.

Four, description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Among the last figure: top connection 1, central tube 2, fluid cylinder 3, expanding material 4, throw-out collar 5, lock ring 6, staple 7, extrusion ring 8, elevated-temperature seal part 9, packing element bearing 10, sleeve pipe pin thread 11.

Five, the specific embodiment:

In conjunction with the accompanying drawings 1, the utility model will be further described:

Its technical scheme is: mainly be made up of top connection 1, central tube 2, fluid cylinder 3, expanding material 4, throw-out collar 5, lock ring 6, staple 7, extrusion ring 8, elevated-temperature seal part 9 and packing element bearing 10, one end of described central tube 2 connects top connection 1, the other end is provided with sleeve pipe pin thread 11, the middle outer wall of central tube 2 flexibly connects fluid cylinder 3, between fluid cylinder 3 and central tube 2, expanding material 4 is housed, above-mentioned top connection 1 is a casing coupling, connects the completion tubular column of top; 10 pairs of elevated-temperature seal parts 9 of packing element bearing are spacing; Elevated-temperature seal part 9 is extruded ring 8 extruding; Lock ring 6 is threaded with the special locking of central tube 2 employings and stops extrusion ring 8 to retreat; Extrusion ring 8 is connected with throw-out collar 5 usefulness staples 7; Expanding material 4 is contained between fluid cylinder 3 and the central tube 2; Fluid cylinder 3 is threaded with central tube 2 usefulness; The step that fluid cylinder 3 screw thread ends leave processing on step and the central tube 2 forms spacing, guarantee fluid cylinder 3 reaction force when work have the strong point and stressed evenly, be processed with the screw thread of step and various different sizes on the central tube 2, be sleeve pipe male thread 11 bottom, be connected with the below completion tubular column.

The elevated-temperature seal part is to be made by resistant to elevated temperatures poly-tetrafluoro composite material, 1. poly-tetrafluoro composite material heatproof--300-360 ℃, with the solely apparent advantage of the rubber seal of routine; 2. have remarkable corrosion resistance--can bear alkali metal, fluorinated dielectric and be higher than all strong acid, strong oxidizer, reducing agent outside 300 ℃ of NaOH except fusion; 3. valuable noninflammability--limited oxygen index is below 90.

During use, heavy oil wells thermal recovery segmentation completion casing external packer and the completion tail pipe design attitude that connects together down, when the steam injection temperature is elevated to 150 ℃, expanding material in the thermal recovery external packer of pipe begins to expand, make the thrust mechanism of external packer of pipe produce an enough big end thrust, promote the seal distortion of both sides, shutoff the annular space between sleeve pipe and the well, make thermal recovery segmentation completion casing external packer on the section of going into the well annular space isolated fully, prevented to scurry mutually between oil, gas, the water layer logical effectively.

Claims

1. heavy oil wells thermal recovery segmentation completion packer, mainly by top connection (1), central tube (2), fluid cylinder (3), expanding material (4), throw-out collar (5), lock ring (6), staple (7), extrusion ring (8), elevated-temperature seal part (9) and packing element bearing (10) are formed, one end of described central tube (2) connects top connection (1), the other end is provided with sleeve pipe pin thread (11), the both sides outer wall of described central tube (2) flexibly connects fluid cylinder (3), between fluid cylinder (3) and central tube (2), expanding material (4) is housed, one side of fluid cylinder (3) is provided with throw-out collar (5), throw-out collar (5) is connected by staple (7) with extrusion ring (8), it is characterized in that: the centre of described central tube (2) is provided with elevated-temperature seal part (9) and packing element bearing (10), elevated-temperature seal part (9) adopts poly-tetrafluoro composite material to make, be respectively equipped with lock ring (6) in the throw-out collar of central tube both sides (5), adopt locking screw to be connected with central tube (2) and stop extrusion ring (8) to retreat.

2. heavy oil wells thermal recovery segmentation completion packer according to claim 1, it is characterized in that: described fluid cylinder (3) screw thread end leaves step, and described central tube (2) is gone up processing step, and two steps form spacing.