CN202081849U

CN202081849U - Fishing cup used for oil field well drilling and well repairing

Info

Publication number: CN202081849U
Application number: CN2011202017259U
Authority: CN
Inventors: 明柱平; 纪泮礼
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2011-12-21
Anticipated expiration: 2021-06-15

Abstract

The utility model relates to a fishing cup used for oil field well drilling and well repairing, namely an FLB type reverse circulation fishing cup, which includes an upper joint, an outer barrel and a lower joint connected in sequence. The fishing cup is characterized in that an inner barrel connected with the upper and the lower joints are arranged in the outer barrel; a passage with the inside communicated with the upper joint is arranged at the upper part between the inner and the outer barrels, and a liquid outlet hole extending out of the outer barrel is arranged at the lower part between the inner and the outer barrels; a screen pipe is connected with the upper joint inside the inner barrel; a passage extending out of the upper joint is arranged inside the screen pipe; a cup body is arranged below the screen pipe; and the cup body is connected with the lower joint. In the utility model, the additionally arranged passage for the inner and outer barrels facilitates the sediment of the fishing cup and the collection of sediments; the additionally arranged screen pipe enables the circulation of the well bottom to be clean; and operations of sleeving, milling, grinding and fishing are integrated to achieve better use effect.

Description

Anti-circulation fishing cup

Technical field

The utility model relates to the fishing cup that a kind of oil drilling, well workover are used, the i.e. anti-fishing cup that circulates of FLB type.

Background technology

In the prior art, fishing cup is to be used to salvage down-hole fragment junk, as hard-metal insert, bit bearing, drilling etc.China's utility model patent disclosed a kind of name and has been called with boring fishing cup, the patent No. 200320126588.2 on December 15th, 2004.It comprises connector, is connected to axle below the connector, an intrinsic 2-8 reinforcing rib on the axle, and reinforcing rib is equipped with urceolus outward.Its shortcoming is that salvaging, sedimentation effect are bad.

The utility model content

The purpose of this utility model is to provide a kind of result of use better anti-circulation fishing cup at above-mentioned deficiency.

Technical solution of the present utility model is: the anti-fishing cup that circulates comprises top connection, urceolus, the lower contact that connects in turn, it is characterized in that the inner core that is connected with upper and lower joint is arranged in the urceolus, have between the inside and outside tube with top connection in the passage that communicates, the fluid hole outside the logical urceolus is arranged down; Top connection in the inner core is connected with screen casing, and the outer passage of logical top connection is arranged in the screen casing; There is cup the screen casing below, and cup is connected with lower contact.

In brill, well workover process, drilling fluid is flushed to the cup inner chamber to the chip under milling through brill, cover by anti-circulation canal, drilling fluid suddenly descends at inner core place flow velocity through choked flow, the drilling fluid of plug block body, form whirlpool, its carrying capacity also weakens greatly, thereby make in the drilling fluid heavier mincing fall into cup and pull out with trip-out, its drilling fluid returns the well face by a plurality of circular hole passages of screen casing, to have reached the purpose at the bottom of the clear well.

The utility model has the advantages that: 1, increased inside and outside tube passage, the fishing cup precipitation is convenient to sediment and is collected easily; Increased screen casing, the shaft bottom circulation is clean, and result of use is better; 2, overlap, mill, grind, drag for and be one; 3, this instrument can also use with other milling instrument and drill bit.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Description of drawings

Accompanying drawing is the utility model structure diagram.

The specific embodiment

Referring to accompanying drawing, the anti-fishing cup that circulates comprises top connection 1, urceolus 2, lower contact 8, the pipe nipple 9 that connects in turn, also has sealing ring 7.The inner core 5 that is connected with upper and lower joint 1,8 is arranged in the urceolus 2, have between the inside and outside tube 5,2 with top connection 1 in the passage 11 that communicates, the outer fluid hole 12 of logical urceolus 2 is arranged down; Top connection 1 in the inner core 5 is connected with screen casing 3, and the passage 13 outside the logical top connection 1 is arranged in the screen casing 3; There is cup 6 (pipe) screen casing 3 belows, and cup 6 is connected with lower contact 8.

Fluid hole 12 is a plurality of downward inclined hole along urceolus 2 circumference uniform distributions, is uniformly distributed along the circumference 20 among the figure, and arranges for twice, satisfies bigger fluid.Screen casing is connected with plug block body 43 times, to strengthen intensity herein.

Fishing cup is right after on drill bit, bistrique, milling shoe, pipeline scraper or junk basket.Generally do not need special operational, along with the carrying out that creeps into can be salvaged.If be specifically designed to after salvaging can treat that the shaft bottom sand setting washes down, rotate in the shaft bottom, conversion displacement flush number minute can pull out of hole.

Operating principle: in brill, well workover process, aboveground highly pressurised liquid is cavity, fluid hole 12, the cooling of supply drill bit between passage 11, inside and outside tube 5,2; Drilling fluid is flushed to cup 6 inner chambers to the chip under milling through brill, cover by anti-circulation canal afterwards, drilling fluid suddenly descends at inner core 5 place's flow velocitys through choked flow, the drilling fluid of plug block body 4, form whirlpool, its carrying capacity also weakens greatly, thereby make in the drilling fluid heavier mincing fall into cup 6 (space between inner core 5 and the cup 6) and pull out with trip-out, its drilling fluid returns the well face by more than 3 circular hole of screen casing, passage 13, to have reached the purpose at the bottom of the clear well.

The anti-fishing cup that circulates of FLB is mainly used in and cooperates instruments such as boring, overlap the milling class in the drilling and repairing well process, by the anti-circulation of drilling fluid smaller particles, iron filings etc. in the well are dashed and to mill up, be deposited in glass chamber, it is detachable that this sediment bowl takes out the back, sediment is poured out, installed and used again.

Claims

1. anti-circulation fishing cup, comprise the top connection (1), urceolus (2), the lower contact (8) that connect in turn, it is characterized in that the inner core (5) that is connected with upper and lower joint (1,8) is arranged in the urceolus (2), have between the inside and outside tube (5,2) with top connection (1) in the passage (11) that communicates, the fluid hole (12) outside the logical urceolus (2) time is arranged; Top connection (1) in the inner core (5) is connected with screen casing (3), and the outer passage (13) of logical top connection (1) is arranged in the screen casing (3); There is cup (6) screen casing (3) below, and cup (6) is connected with lower contact (8).

2. according to the described anti-circulation fishing cup of claim 1, it is characterized in that fluid hole (12) is a plurality of downward inclined hole along the urceolus circumference uniform distribution.

3. according to claim 1 or 2 described anti-circulation fishing cups, it is characterized in that being connected with under the screen casing (3) plug block body (4).