Device for fastening a manoeuvrable plug for plugging of pipes
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16L-055/12
F16L-055/10
출원번호
US-0518763
(2003-06-19)
우선권정보
NO-20023099(2002-06-26)
국제출원번호
PCT/NO03/000204
(2003-06-19)
§371/§102 date
20041221
(20041221)
국제공개번호
WO04/003422
(2004-01-08)
발명자
/ 주소
Syse,Harad
출원인 / 주소
Plugging Specialists International ASA
대리인 / 주소
Onsagers AS
인용정보
피인용 횟수 :
6인용 특허 :
12
초록▼
Arrangement at a plug for sealing liquid-or gas-carrying pipes, comprising several slips (15) arranged peripherally on the plug, so as to allow them to be pushed up along a conical force ring ( 25) by means of a hydraulic cylinder (5), where the slips ( 15) are provided with a possibly divided slidi
Arrangement at a plug for sealing liquid-or gas-carrying pipes, comprising several slips (15) arranged peripherally on the plug, so as to allow them to be pushed up along a conical force ring ( 25) by means of a hydraulic cylinder (5), where the slips ( 15) are provided with a possibly divided sliding surface (19, 19') and at least one possibly divided sliding surface (20, 23) having an angle that differs from the angle of the sliding surface ( 19, 19'). The force ring (25) has sliding surfaces (27, 29, 29', 31) that correspond to the sliding surfaces (19, 19', 20, 23) of the slips. The first part of the sliding surfaces (20, 23, 27, 31) has a steep gradient and the second part of the sliding surfaces (21, 21', 29, 29') has a small gradient.
대표청구항▼
The invention claimed is: 1. A plug for sealing liquid-or gas-carrying pipes, comprising several slips (15) arranged peripherally on the plug, so as to allow them to be pushed up along a conical force ring (25) by means of a hydraulic cylinder (5), characterized in that the slips (15) are provided
The invention claimed is: 1. A plug for sealing liquid-or gas-carrying pipes, comprising several slips (15) arranged peripherally on the plug, so as to allow them to be pushed up along a conical force ring (25) by means of a hydraulic cylinder (5), characterized in that the slips (15) are provided with at least one slip sliding surface ( 21, 21') and at least one slip front sliding surface (20 , 23) having an angle relative to a longitudinal axis of the plug that differs from the angle of the slip sliding surface (21, 21') relative to the same axis, where the slips (15) are arranged to engage an inner surface of the pipe in a gripping position while in abutment against an angled surface of the force ring (25) which is not parallel with the longitudinal axis of the plug. 2. A plug in accordance with claim 1, characterized in that the conical force ring (25) is equipped with at least one force ring sliding surface (29, 29') and at least one force ring front sliding surface (27, 31) having an angle relative to the longitudinal axis of the plug that differs from the angle of the force ring sliding surface (29, 29') relative to the same axis. 3. A plug in accordance with claim 2, characterized in that the slip and force ring front sliding surfaces (20, 23, 27, 31) have a steep gradient relative to the longitudinal axis of the plug and that the slip and force ring sliding surfaces ( 21, 21', 29, 29') have a small gradient relative to same axis. 4. A plug in accordance with claim 2 or 3, characterized in that the slip front sliding surface (20, 23) and slip sliding surface (21, 21') have a shape that in a given position of the slips (15) corresponds to the force ring front sliding surface (27, 31) and force ring sliding surface ( 29, 29'). 5. A plug in accordance with claim 1, characterized in that the slips (15) comprise a first slip front sliding surface ( 20) and the slip sliding surface (21, 21') is divided by a slip recess (22) that extends in a radial direction similar to the first slip front sliding surface (20), whereby a surface immediately adjacent to the recess forms a second slip front sliding surface (23) parallel to the first slip front sliding surface ( 20). 6. A plug in accordance with claim 2, characterized in that the conical force ring (25) comprises a first force ring force sliding surface (27) and the force ring sliding surface is divided by a force ring recess (30) extending in a radial direction similar to the first force ring front sliding surface (27), whereby a surface immediately adjacent the recess forms a second force ring front sliding surface (31) parallel to the first force ring front sliding surface (27).
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이 특허에 인용된 특허 (12)
Lecordier Michel G. (Marseille FR), Apparatus for internally checking well pipe bore and for automatically sealing leaks therein.
Bath William R. ; Yemington Charles R., Method and apparatus for replacing damaged section of a subsea pipeline without loss of product or entry of seawater.
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