Well tool with selective bypass functions

专利名称：Well tool with selective bypass functions发明人：Barrington, Burchus Q.申请号：EP85306491.3申请日：19850912公开号：EP0175553B1公开日：19910807

摘要：A well tool apparatus includes a housing (12) adapted to be connected in a pipestring. A mandrel (124) is slidably received in the housing and adapted to be selectivelytelescoped between first (as shown) and second positions relative to the housing. Themandrel has a flow passage (14) therethrough and has a lateral bypass port (142)communicating the flow passage with an exterior surface of the mandrel for allowing wellfluids to bypass the flow passage of the well tool as the tool is being lowered into a well.A reversible removable sliding sleeve (340) is disposed about the exterior surface of themandrel and is constructed to abut the housing and to be thereby moved from a firstposition wherein the bypass port is open to a second position wherein the bypass port isclosed, upon telescoping collapsing movement of the housing relative to the mandel.The sliding sleeve has a latch (352) on one end thereof. With the sleeve in a first

orientation relative to the mandrel, the latch is arranged to engage a latch engagement(358) of the mandrel so as to lock the bypass in a closed position upon the first

telescoping collapsing movement of the tool. In a second arrangement, the sliding sleeveis reversed in its position relative to the mandrel so that the latch of the sliding sleeve isalways latched to the housing (at 368), thus providing a tool wherein the bypass port maybe repeatedly closed and opened upon repeated telescoping collapsing and extending

movements of the tool. A final arrangement of the tool allows the bypass port and thesliding sleeve to be completely removed to eliminate the bypass.

申请人：HALLIBURTON COMPANY

地址：P.O. DRAWER 1431; DUNCAN OKLAHOMA 73536

代理机构：Wain, Christopher Paul

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