CN201606022U

CN201606022U - Unconsolidated strata mechanical pressurizing-type closed coring tool

Info

Publication number: CN201606022U
Application number: CN2009202445023U
Authority: CN
Inventors: 钱可贵; 刘春来; 于智峰; 向峰; 李龙涛; 张士超
Original assignee: Daqing Petroleum Administration Bureau
Current assignee: Daqing Petroleum Administration Bureau
Priority date: 2009-12-25
Filing date: 2009-12-25
Publication date: 2010-10-13
Anticipated expiration: 2019-12-25

Abstract

The utility model relates to an unconsolidated strata mechanical pressurizing-type closed coring tool, which mainly solves the problems of the present mechanical pressurizing-type coring tool that multiple-time delivery is required, drilling tool is uplifted, and the influence of the well deflection is large, and is characterized in that: a pin sleeve (4) is arranged inside a hexagonal rod (2), the lower part of the pin sleeve (4) is connected with a shearing pin sleeve (6) through a pin (5), the interior of the shearing pin sleeve (6) is provided with an oblique surface with the diameter being smaller than that of a releasing ball (7) which is matched with the releasing ball (7), the hexagonal rod (2), a hexagonal sleeve (3) and the shearing pin sleeve (6) are uniformly provided with a plurality of holes (23) on the horizontal direction, a ball plug (8), a suspension ball (9) and a ball support (10) are sequentially arranged inside the holes (23) from exterior to interior, and the outer diameter of the suspension ball (9) is respectively matched with a pit of the ball plug (8) and the ball support (10). The unconsolidated strata mechanical pressurizing-type closed coring tool has the advantages that the ball is only required to deliver for one time, the drilling tool is free from being uplifted, and the influence of the well deflection is small.

Description

A kind of scall machinery adding pressure type sealing core drilling instrument

Technical field:

The utility model relates to a kind of oil drilling coring tool, a kind of specifically scall machinery adding pressure type sealing core drilling instrument.

Background technology:

It is a difficult point during oil drilling is cored that scall is cored, and existing coring tool has fluid power adding pressure type and mechanical adding pressure type, generally all adopts the formula core grabber of tackling all problems at once.And mechanical adding pressure type coring tool core finish after, need to carry drilling tool, divide then and for several times drop into several steel balls, by pressure rod, cut off inner core and hang pin, then inner core is pressurizeed, make core grabber draw core breaking in, work getting out the heart then.Therefore, existing mechanical adding pressure type coring tool need repeatedly pitching, on carry drilling tool, be subjected to Well Deflection Influence big, operation is wasted time and energy.

The utility model content:

For overcome existing mechanical adding pressure type coring tool need repeatedly pitching, on carry drilling tool, be subjected to the big deficiency of Well Deflection Influence, the utility model provides a kind of scall machinery adding pressure type sealing core drilling instrument, and this scall machinery adding pressure type sealing core drilling instrument has an only pitching of need, do not use and carry drilling tool, be subjected to the little characteristics of Well Deflection Influence.

The technical solution of the utility model is: a kind of scall machinery adding pressure type sealing core drilling instrument, comprise six square bars, six sides cover, in described six square bars guide is arranged, the guide bottom by pin with cut off the cover be connected, described cut off cover inner have with discharge that ball cooperates and diameter less than the inclined-plane of release bulb diameter, described six square bars and six sides cover and the hole that cuts off uniform several horizontal directions in cover corresponding position, ecto-entad is equipped with ball successively and blocks up, hangs ball, ball holder in the hole, and suspension ball external diameter pit stifled with ball respectively, the ball holder matches.

The diameter of described suspension ball is less than the diameter in hole.

The utlity model has following beneficial effect: owing to take such scheme, guide, cut off cover, pin is put to tool interior, need not consider the sealing problem inside and outside the drilling tool; Hang ball external diameter pit stifled with ball respectively, the ball holder and match, and hang the diameter of the diameter of ball less than the hole, the suspension ball is not directly contacted with six sides cover with six square bars, ball is that face contacts with ball-and-socket, increases lifting surface area, improves reliability; Cut off the cover inclined-plane and discharge ball and cooperates and make its unlikely falling, therefore only throw a release ball from the ground pitching, minimizing pitching number of times, and be not subjected to Well Deflection Influence; In addition, after core drilling is finished, do not use and carry drilling tool, thereby guarantee that drill bit does not leave the shaft bottom, reduced operational sequence, saved the time.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is the sectional views along A-A in the accompanying drawing 1;

Accompanying drawing 3 is the sectional views along B-B in the accompanying drawing 1;

Accompanying drawing 4 is the enlarged drawings at I place in the accompanying drawing 1.

The big joint of 1-among the figure, 2-six square bars, 3-six sides cover, 4-guide, the 5-pin, 6-cuts off cover, and 7-discharges ball, and the 8-ball is stifled, 9-hangs ball, the holder of 10-ball, the top connection of 11-urceolus, 12-return connector, the 13-urceolus, stifled on the 14-inner core, 15-inner core, 16-bushing pipe, the lower contact of 17-urceolus, 18-drill bit, the lower contact of 19-inner core, the 20-core grabber of tackling all problems at once, the airtight head of 21-, 22-pin, 23-hole.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By Fig. 1 in conjunction with Fig. 2, Fig. 3, shown in Figure 4, a kind of scall machinery adding pressure type sealing core drilling instrument, comprise big joint 1, six square bars 2, six sides cover 3, big joint 1 links to each other with the top drilling tool, the top drilling tool is pressed on the guide 4, prevent to move on guide is in going down process, big joint bottom links to each other with six square bars 2, in described six square bars 2 guide 4 is arranged, and guide 4 bottoms are overlapped 6 and are connected with cutting off by pin 5, there is boss described cover 6 inside that cut off, the inclined-plane is arranged on the boss, and the inclined-plane diameter makes its unlikely falling less than discharging ball 7 diameters; Described six square bars 2 and six sides cover 3 and the hole 21 that cuts off uniform several horizontal directions in cover 6 corresponding positions, consider the size of six square bars, 2 diameters, hole 21 can process 3, hole 21 interior ecto-entads are equipped with ball successively and block up 8, hang ball 9, ball holder 10, hanging ball 9 external diameters pit stifled 8 with ball respectively, ball holder 10 matches, and the diameter of described suspension ball 9 is less than the diameter in hole 21, suspension ball 9 is not directly contacted with six sides cover 3 with six square bars 2, hanging ball 9 is that face contacts with ball-and-socket, increase lifting surface area, improve reliability.

Described six square bars 1 time link to each other with return connector 12, and return connector 1 links to each other with inner core 15, and inner core connects inner core lower contact 19 15 times, and inner core lower contact 19 links to each other with the core grabber 20 of tackling all problems at once; Described six sides cover connects urceolus top connection 11 3 times, and urceolus top connection 11 bottoms link to each other with urceolus 13, and urceolus connects urceolus lower contact 17 and drill bit 18 for 13 times, and the drill bit 18 inner pins 22 that pass through are connected with airtight 21; Bushing pipe 16 is arranged in the inner core 15, inner core 15 tops by stifled 14 on the inner core, bottom by airtight 21 sealing fluid that seals together in the inner core 15.

During work, be drilled into the shaft bottom earlier, circulating fluid presses down drilling tool earlier before coring, cut off pin 22 fixing between airtight 21 and the drill bit 18, enter inner core for airtight 21, core-drilling then, creep into predetermined drilling depth after, throw from ground and to discharge ball 7, build the pressure then, pressure is cut off pin 5 after to a certain degree, it is 6 descending to cut off cover, presses down drilling tool then, owing to do not had to cut off stopping of cover 6, hang ball 9 and ball holder 10 and enter inner chamber, six square bars 2 and six sides cover 3 are thrown off, and drilling tool weight is by big joint 1, six square bars 2, return connector 12, inner core 15 reaches on the pawl core grabber 20 at last, core grabber utilizes the cone angle of drill bit 18 inner chambers, draws core breaking in.

Claims

1. scall machinery adding pressure type sealing core drilling instrument, comprise six square bars (2), six sides overlap (3), it is characterized in that: guide (4) is arranged in described six square bars (2), guide (4) bottom by pin (5) with cut off cover (6) and be connected, described cut off cover (6) inside have with discharge that ball (7) cooperates and diameter less than the inclined-plane of release ball (7) diameter, described six square bars (2) and six sides covers (3) and the hole (23) that cuts off uniform several horizontal directions in cover (6) corresponding position, the interior ecto-entad in hole (23) is equipped with ball stifled (8) successively, hang ball (9), ball holder (10), and hang ball (9) external diameter and block up (8) with ball respectively, the pit of ball holder (10) matches.

2. scall machinery adding pressure type sealing core drilling instrument according to claim 1, it is characterized in that: the diameter of described suspension ball (9) is less than the diameter of hole (23).