[특허]Method and apparatus for oil well stimulation utilizing electrically heated solvents

Method and apparatus for oil well stimulation utilizing electrically heated solvents 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-007/15 E21B-036/04 H05B-003/02 H05B-003/78
출원번호	US-0590755 (1990-10-01)
발명자 / 주소	Nenniger John E. (4512 Charleswood Dr. NW. Calgary Alberta CAX T2L 2E5)
인용정보	피인용 횟수 : 23 인용 특허 : 0

초록 ▼

A method and apparatus of stimulating production from an oil well by removing solid wax deposits from a production zone, includes an electrical resistance heater comprised of a packed bed of spherical heating elements lowered through the tubing on a wireline and placed adjacent to the perforations. Solvent is pumped through the heater to raise its temperature by 200°C. and then into the formation to contact wax deposits. The solid wax deposits are liquified and together with the oil and the solvent form a single liquid phase. The wax is then removed from the formation by placing the well back on production. Because the invention completely avoids the use of either water or gas, the saturation of the water and gas phases in the formation is minimized, thereby maximizing the mobility of the liquid phase containing the wax and facilitating the removal of the liquified wax from the treatment area before it reprecipitates. The packed bed heater has a large surface area and a large heat transfer coefficient, so high power rates (150 kW) can be achieved within a compact volume (6 m long×5 cm id) without solvent degradation. By heating the solvent to a high temperature, a minimum volume of solvent is required, thereby minimizing production downtime and solvent costs. The burnout and catastrophic failure problem usually associated with resistive heaters is avoided due to the multiplicity of current paths through the packed bed.

대표청구항 ▼

An electrical heater for heating liquid comprising: a means for attaching the heater to a source of electrical power; and a heater body having at least one liquid inlet and at least one liquid outlet; and a flow through resistive electric heating element means comprising a packed bed of conducting heating elements, the packed bed having a hydraulic pressure drop there across of 20 MPA or less for a flowrate of 1 m3/day, a heat transfer area greater than 10 m2 per 1 m3 of heater; and an electrical resistance of greater than or equal to 1 ohm and less than or equal to 200 ohms; and wherein said liquid to be heated flows through said inlet, into contact with said packed bed of conducting heating elements, through said packed bed and then flows out of said outlet, and said packed bed of conducting heating elements forms a plurality of electrical contacts and thereby a plurality of alternate current pathways and said packed bed inhibits burnout of any particular electrical contact and thereby inhibits liquid degradation.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method and apparatus for oil well stimulation utilizing electrically heated solvents 원문보기

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Method and apparatus for oil well stimulation utilizing electrically heated solvents 원문보기

초록 ▼

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연구과제 타임라인

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