CN2690572Y

CN2690572Y - Core taking tool while drilling

Info

Publication number: CN2690572Y
Application number: CN 200420030614
Authority: CN
Inventors: 杨立文; 孙文涛; 韩连胜
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2004-03-01
Filing date: 2004-03-01
Publication date: 2005-04-06
Anticipated expiration: 2014-03-01

Abstract

The utility model discloses a core taking tool while drilling, belonging to the tool class of drilling well and core taking. The existing double-cylindrical core taking tool and a special core taking tool are provided, when the core is taken, no matter how long the core is, pipe strings in well are entirety uniformly needed to be pulled out, and the core can be taken out. If the core is broken, special bit and drill stem are put down between the core taking of two times, which undoubtedly increases the time and cost of core taking. In order to overcome the disadvantages, an inner core assembly is sequentially provided from bottom to top in an outer cylinder assembly on the lower end of a drill stem, which is adopted in the utility model. An inner cylinder overshot assembly and a core bit can realize that every time the core is taken, a drill device is of no need to be put down, the utility model also overcomes the defect of common core taking tool that when the core is taken in a discontinuous way, comprehensive drilling can be carried out on the condition that the core taking tool is pulled out and the bit is replaced. For the device simplifies manufacturing process, and saves drilling time and the core taking tool while drilling can reduce drilling cost, therefore the utility model can be extensively used in the operation of drilling well and taking core.

Description

A kind of with drilling through the core instrument

Technical field:

The utility model relates to a kind of with drilling through the core instrument, belongs to drilling extracting core instrument class.

Background technology:

No matter conventional coring tool is that bitubular instrument and special coring tool whenever drill through one section core and just drill string in the well all must be tripped out ground in coring in the existing technology, could take out core from inner core, then, is lowered to coring tool again and could continues to get core.Get core if run into to be interrupted, also must advance to be lowered between the operation drill bit and drill string, to get core time and cost just increased like this at twice core drill.

The utility model content:

The utility model purpose is provide in order to overcome above-mentioned shortcoming a kind of with drilling through the core instrument, and this instrument can advance and creep under the situation comprehensively by core drill in oil well, does not need by drilling, can carry out continous sampling and creep into.

The utility model is to realize like this.

It is by the outer barrel assembly of screwed connection and the coring bit composition of using screwed connection in the outer barrel assembly lower end in the drill string lower end.

Core tube assembly and inner core fisher assembly are fixed together by seat ring and seat ring head in from top to bottom being equipped with in the described outer barrel assembly.

Described outer barrel assembly is the bullet retaining head that is positioned at this instrument upper end with, be threaded togather with screw thread and drill string on this retaining head, the screw thread that plays block head lower end is connected with bullet card chamber, bearing ring is arranged at top, bullet card chamber, the screw thread of lower end, bullet card chamber and seat ring joint link, the top endoporus of present ring joint has seat ring, and seat ring joint and outer rock core tube be with being threaded, and is linking coring bit with screw thread below the outer rock core tube.

Core tube assembly has tap also to link by the inner core fishing spear of tap screw thread and top in described, hanging ring and brass adjustable ring are installed successively in the tap outside, there is the drilling fluid runner at the tap center, be equipped with in the following tap and be positioned at the ball-and-seat axle, last semi-ring (33), rubber ring, ball-and-seat axle lower end endoporus be the single valve ball, in receive seat, external inner barrel, inner barrel lower end link together with screw thread and core grabber seat, being equipped with in the core grabber seat can up and down clip core grabber.

Described inner core fisher assembly, be the steel cable cap to be arranged on this assembly top, the steel cable cap passes through safety pin, connecting pin and safety joint link together, and described safety joint is connected with Safety shell with connecting pin, the Safety shell bottom is connected with bearing spindles with screw thread, be with the bearing pressure cap in the bearing spindles bottom, bearing and pad are used fixed by nut.Adorn weighted lever in bearing pressure cap lower end, and interfix, use threaded connection between weighted lever and the fishing socket with screw.

The utility model working method:

When using the utility model to get core, in outer barrel assembly, from bottom to top interior core tube assembly and inner core fisher assembly are packed into respectively, use pressure ring and pressure ring joint subsequently Work-sheet pressing by part, then core bit is connected above the screw thread of outer barrel assembly promptly desirable core.

When getting the core end, be lowered to the fishing spear assembly with wire rope, core tube assembly in pulling out, and take out the interior core of core tube, and then, core tube assembly in being lowered to again, core drill advances once more, so carries out, until getting the core end.

In coring, if need normally creep into the time, can be under the situation that does not play drill string, core tube assembly in pulling out earlier is lowered to the center bit assembly then, at this moment, can creep into comprehensively.If once more the center bit assembly is pulled out, with inner barrel assembly G.I.H, can carry out core drill and advance, whole process so hockets.

The utility model compared with prior art has remarkable advantage:

Use coring tool that the utility model provides, when getting core, as long as after having drilled through a core with this instrument, just can take out core by ground by the fisher assembly, and then be lowered to the inner barrel assembly in the drill string and creep into and get core from proposition core barrel in the drill string.So operation is till core that will core drilling well section has been got.If two sections well sections of getting between the core do not need to get core, only need be lowered to the fisher instrument and pull center bit out and be lowered to and get in-core tube assembly and can change core drill over to and advance mode, therefore, simplify the drillng operation program greatly, improved and got core efficient, reduced drilling cost.

Description of drawings:

Fig. 1 is the utility model outer barrel assembly structural representation

Fig. 2 is interior core tube assembly schematic diagram

Fig. 3 is a center bit assembly schematic diagram

Fig. 4 is a fishing spear assembly schematic diagram

Fig. 5 is an inner core fisher assembly schematic diagram

The specific embodiment:

The utility model is provided by following examples:

Below in conjunction with accompanying drawing the utility model is described further.

Outer barrel assembly A among the figure, interior core tube assembly B, inner core fisher assembly C comprises with lower member among fishing spear assembly D and the center bit assembly E:

Play block head 1, bearing ring 2, bullet card chamber 3, seat ring 4, seat ring joint 5, outer rock core tube 6, coring bit 7, steel cable cap 8, safety pin 9, safety joint 10, connecting pin 11, safety joint shell hoop body 12, bearing spindles 13, bearing pressure cap 14, bearing 15, pad 16, nut 17, weighted lever 18, salvage sleeve 19, lance sheet 20, spring 21, pin 22, lance bar 23, bearing pressure cap 24, bearing sealed ring 25, bearing support 26, bearing 27, semi-ring 28, last tap 29, hanging ring 30, brass adjustable ring 31, following tap 32, last semi-ring 33, sealed bearing 34, rubber ring 36, ball-and-seat mandrel 38, ball-and-seat 39, receive the seat 40, interior core tube 41, clip core pawl 42, core pawl seat 43.

Among Fig. 1: in the drill string lower end, the outer rock core tube 6 of lower end is connected with coring bit 7 by screw thread the bullet block head of outer barrel assembly A upper end by screwed connection.During work, core tube assembly B and inner core fisher assembly C in outer barrel assembly A, packing into, and after being fixed with seat ring 4 and seat ring joint 5, can go into the well and get core.

4 effects of the bullet block head on outer barrel assembly A top and the seat ring of medium position are upper and lower plaies of the mutual E of center bit assembly of core tube assembly B and inner core fisher assembly C and bottom in being used for preventing when carrying out that core drill advances and creeping into comprehensively.

Lance sheet 20 and spring 21 are equipped with in the top of fishing spear assembly D among Fig. 4, its objective is that the lance sheet is under the effect of spring, hypertonic radially, when getting core and creeping into comprehensively, can open, and withstand on the step that plays block head 1 (among Fig. 1), thereby can prevent the inner core assembly play that makes progress, under inner core fisher assembly B and fishing socket effect, inwardly shrink, and in making the core tube by proposing in the outer barrel assembly, thereby can realize salvaging.

Fig. 3 is center bit assembly E, interior core tube 41 is equipped with in the centre, is located in above the crossover sub 44, and this crossover sub is following to join with center bit 45, hydrophthalmia is arranged in the drill bit, and this drill bit uses when only limiting to creep under the situation of core tube in tripping out comprehensively.

The utility model in, core diameter is 55～110 millimeters during the hard formation core drilling.

Claims

1, a kind of with drilling through the core instrument, be that outer barrel assembly (A) and the outer barrel assembly lower end by screwed connection formed with the coring bit (7) that screw thread links in the drill string lower end: it is characterized in that: core tube assembly (B) and inner core fisher assembly (C) in from top to bottom being equipped with in the described outer barrel assembly (A) are fixed together with pressure ring (2) and pressure ring joint (5).

2, according to claim 1 a kind of with drilling through the core instrument, it is characterized in that: outer barrel assembly (A) comprises that plays a block head (1), screw thread and drill string by this bullet block head upper end are threaded togather, screw thread is connected with bullet card chamber (3) in bullet block head lower end, pressure ring (2) is arranged at top, bullet card chamber, the screw thread of its lower end, bullet card chamber (3) and seat ring joint (5) link, seat ring (4) and seat ring joint (5) and outer rock core tube (6) are housed with being threaded togather in the endoporus of present ring joint (5) top, coring bit (7) in the usefulness screwed connection below the outer rock core tube;

Core tube assembly (B) is to go up tap (29) by one in described, by screw thread be connected inner core fishing spear device assembly (C), the lower end links together with following tap (32), outside last tap, hanging ring (30) and brass adjustable ring (31) also have been installed have successively been gone up tap, there is the drilling fluid runner at the center, in following tap (32), be equipped with and be positioned at upward semi-ring (33) of ball-and-seat axle (38), bearing (35), sealing ring (36) and bearing support (37), ball-and-seat axle (38) stomidium down is single current valve ball (39), core tube (41) was connected with core pawl seat (43) with screw thread in interior core tube (41) lower end in the seat (40) of receiving was external, and clip core pawl (42) is housed in the core pawl seat (43);

Described inner core fisher assembly (C), be steel cable cap (8) to be arranged on this assembly top, the steel cable cap is by safety pin (9), connecting pin (11) and safety joint (10) link together, and described safety joint (10) is connected with Safety shell (12) with connecting pin (11), Safety shell (12) bottom is connected with bearing spindles (13) with screw thread, be with bearing pressure cap (14) in bearing spindles (13) bottom, bearing (15) and pad (16), fixing with nut (17).In bearing pressure cap (14) lower end weighted lever (18) is housed, and interfixes with screw, between weighted lever (18) and the fishing socket (19) with being threaded.

3, according to claim 1 a kind of with drilling through the core instrument, it is characterized in that: also comprise a fishing spear assembly (D) in the outer barrel assembly, this assembly comprises the spring (21) by lance sheet (20) and top, lance sheet lower end is hinged on the lance bar (23) with pin (22), is with sealing ring (25), bearing (27) and semi-ring (28) that bearing is arranged on bearing pressure cap (24), lance bar (23) external diameter on the lance bar; Bearing pressure cap (24) is connected with last tap (29) with screw thread.