CN2203352Y

CN2203352Y - Fisher

Info

Publication number: CN2203352Y
Application number: CN 94236554
Authority: CN
Inventors: 吴建国; 张明云; 戴长生; 兰祥华
Original assignee: EAST-SICHUAN DRILLING Co SICHUAN PETROLEUM ADMINISTRATION
Current assignee: EAST-SICHUAN DRILLING Co SICHUAN PETROLEUM ADMINISTRATION
Priority date: 1994-05-20
Filing date: 1994-05-20
Publication date: 1995-07-12
Anticipated expiration: 2004-05-20

Abstract

The utility model discloses a salvage device salvaging oil tubes or drill rods falling into well bottoms in petroleum and gas drilling works, comprising a sleeve barrel 1, a slide block 3 and a guide shoe barrel 4. The center section of the sleeve barrel 1 is provided with three rectangular slide ways 2 serving as the sliding tracks of the slide block 3; the inner cavity of the sleeve barrel 1 where the slide ways 2 are positioned is an inverted-cone-shaped cavity with a small bottom and a large top; the slide block 3 is a block-shaped object. The salvage device can increase the salvage size range of the oil tubes or the drill rods, salvage falling oil tubes or drill rods with freeform heads, complete the operation of wash-over and salvage at one step, effectively reduce trouble removal cost and relieve workers' labor intensity.

Description

Fisher

The utility model relates to salvages the fisher that falls into shaft bottom oil pipe or drilling rod in oil, the gas drilling engineering.

In oil, gas drilling, formation testing, workover treatment, owing to casing deformation, bore hole collapse, flow-induced corrosion or other reason, may cause oil pipe or drilling rod slide fastener or the fracture well that falls,, fishing junk must be come out for guaranteeing carrying out smoothly of drilling well, formation testing, workover treatment.The junk head is different under the different situations, at difform junk, the main tool of salvaging is dragged for lance, die nipple, female coupling tap, slip socket, and these instruments only adapt to the fishing junk that head is a certain shape separately, and can not salvage head and be squeezed flat or flexural deformation junk.

The purpose of this utility model is to provide a kind of novel fisher with chute and slide block, and it can salvage oil pipe or the drilling rod that the down-hole head is an Any shape.

The utility model comprises sleeve, slide block, guide shoe tube.The screw thread dress of sleeve lower end and guide shoe tube upper end closes, the end of guide shoe tube is a guide shoe, have 3 chutes in the middle part of sleeve symmetry, the barrel bore at chute place is the little down big back taper cavity of, slide block is positioned at chute, can in chute, slide up and down, slide block is a kind of block, there is vertical tooth its upper surface, and inner face has a horizontal row to internal tooth, under with fisher in well the time, junk is promptly clamp-oned in the slide block gradually, on carry fisher, slide block is about to junk and clamps, thereby junk is salvaged out from the shaft bottom.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is the axonometric projection graph of slide block.

Fig. 3 is a slide block and the figure that combines of chute.

Among Fig. 1,1 is sleeve, and 3 is slide block, and 4 is the guide shoe tube.Sleeve 1 is the identical steel pipe in inside and outside footpath with guide shoe tube 4, the inner surface on sleeve 1 top is a screw thread, is connected with drilling tool above it with this, and the inner face table of sleeve 1 lower end also is a screw thread, be connected with this screw thread with guide shoe tube 4 upper ends, the lower end of guide shoe tube 4 is a guide shoe 5.Have the chute 2 of 3 rectangles in the stage casing of sleeve 1, as the track that slide block 3 slides, the inner chamber of the sleeve at chute 2 places is the little down big back taper cavitys of.As shown in Figure 2, slide block 3 is a block, and its upper surface has a row to go up end tooth 6 longitudinally, and its inner face has a horizontal row to internal tooth 7.As shown in Figure 3, slide block 3 is embedded in the chute 2, can slide up and down along chute, its vertical tooth 6 up, laterally internal tooth 7 is towards the center of sleeve 1.

The course of work of the present utility model is such: when needs are salvaged, with the utility model by above-mentioned assembling after, be connected on drilling rod or the oil pipe, in the lower going-into-well, when fisher down to the time apart from junk head 5m～10m, suitably slow down lowering velocity, slowly transfer drilling tool and rotation simultaneously then, the junk headgear is gone in the guide shoe tube 4, guide shoe 5 plays junk is pulled out effect in the fisher, continues to transfer drilling tool, and it is up along chute 2 that junk promptly withstands slide block 3, the junk head is clamp-oned between the internal tooth 7 of slide block 3 gradually, and slide block 3 is pushed up to the upper end of the back taper inner chamber of sleeve 1.Stop to transfer drilling tool this moment, and the foul on junk and the slide block 3 is rinsed in turn on pump circulation 3～5 minutes well, is convenient to the fisher junk that is locked.Carry in the termination of pumping,, junk is pulled out because the action of gravity of junk makes the internal tooth 7 of slide block 3 tightly bite junk head and energy self-locking.If the junk bottom is stuck, in drilling tool intensity can not on when carrying junk, because of there is vertical tooth 6 slide block 3 upper surfaces, can be with slide block 3 upper surfaces and oil pipe or the interlock of drill pipe coupling lower surface, collaborative internal tooth is tightly bitten oil pipe or drilling rod back-off by force, drags for and obtains the part junk.Long for the junk leading edge deformation, the sleeve pipe that connects suitable length on sleeve 1 top is as storage cylinder, and then connects drilling tool, and this fisher is transferred to the intact position of junk, the deformation section junk packed into salvage in the storage cylinder of top.If junk is buried by quicksand, between sleeve 1 and guide shoe tube 4, connect several sleeve pipes as milling tube, cover is milled, salvages two procedures once carry out.

The utility model compared with prior art, increased the size range of fishing oil pipe or drilling rod, can salvage head is fall well oil pipe or the drilling rod of arbitrary shape, can realize that also cover mills and salvages once and carry out, improve fishing success ratio, reduced the accident treatment cost, alleviated labor strength, but only needing to change slide block 3 Reusabilities, is the ideal tools of salvaging at present well oil pipe drilling rod. The utility model is on probation at five mouthfuls of wells by the applicant, enters well and salvages 12 times, and success rate reaches 100%.

Claims

1, a kind of fisher comprises guide shoe tube (4), it is characterized in that also having sleeve (1), slide block (3) that chute is arranged on it; Sleeve (1) is the identical steel pipe in inside and outside footpath with guide shoe tube (4), the inner surface on sleeve (1) top is a screw thread, be connected with drilling tool above it with this, the inner surface of sleeve (1) lower end also is a screw thread, be connected with this screw thread with guide shoe tube (4) upper end, the lower end of guide shoe tube (4) is guide shoe (5); Have the chute (2) of three rectangles in the stage casing of sleeve (1), as the track that slide block 3 slides, the inner chamber of the sleeve (1) at chute (2) place is the little down big back taper cavity of; Slide block (3) is a block, and its upper surface has a row vertically to go up end tooth (6), and its inner face has a horizontal row to internal tooth (7), slide block (3) is embedded in the chute (2), can slide up and down along chute (2), it vertically goes up end tooth (6) up, and laterally internal tooth (7) is towards sleeve (1) center.