CN201439692U - Closed core taking and grabbing device - Google Patents
Closed core taking and grabbing device Download PDFInfo
- Publication number
- CN201439692U CN201439692U CN2009201591770U CN200920159177U CN201439692U CN 201439692 U CN201439692 U CN 201439692U CN 2009201591770 U CN2009201591770 U CN 2009201591770U CN 200920159177 U CN200920159177 U CN 200920159177U CN 201439692 U CN201439692 U CN 201439692U
- Authority
- CN
- China
- Prior art keywords
- core
- thrust ring
- groove
- spigot joint
- leaf spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a closed core taking and grabbing device which solves the problem of low reliability on special formation or small-diameter core grabbing of self-locking core grabbing mechanism. A leaf spring (3) is arranged in a concave groove of a claw sleeve joint (1), a clamp plate (2) covers on the leaf spring (3), and part of the clamp plate (2) extends out of the concave groove of the claw sleeve joint (1) is matched with the step on the upper part of a core claw sleeve (4). An annular concave groove is machined on the outer wall of the lower part of a thrust ring (5), part of a wedged opening steel cup (6) is placed in the annular concave groove, the other part thereof is matched the step in the core claw sleeve (4). The top surface outer circumference diameter of the wedged opening steel cup (6) is more than the outer circumference diameter of the bottom surface, and the width of the wedged opening steel cup (6) is less than or equal to the annular concave groove depth of the outer wall on the lower part of the thrust ring (5). The closed core taking and grabbing device has compact structure, convenient mounting and simple site operation and improves the core grabbing reliability of the special formation.
Description
Technical field
The utility model relates to the drilling and coring delivery instrument, and particularly a kind of sealing core drilling is grabbed center device.
Background technology
Sealing core drilling is one of important flow chart of oil, Natural Gas Drilling Operation.At present the great majority that use of oil drilling coring tool belong to the self-locking coring tool, this type of coring tool grab concentric mechanism be applicable to the rock core moulding better, rock stratum that the core surface friction factor is bigger, the easy undergauge of core grabber can be caught rock core effectively.But for the less rock stratum of friction factor (as water sensitivity mud stone, fractured reservoir), or under the situation such as core diameter is less, core grabber is difficult to catch rock core by self-locking, and it is not high that self-locking is grabbed the concentric mechanism reliability.
Summary of the invention
Grab under concentric mechanism special formation and the less situation of core diameter and grab the not high problem of heart reliability in order to solve in the background technology self-locking, the utility model provides a kind of sealing core drilling to grab center device.
A kind of sealing core drilling is grabbed center device, mainly is made up of pawl bell and spigot joint, card, leaf spring, core grabber cover, thrust ring, open wedge steel loop, core grabber, airtight head.Pawl bell and spigot joint top is adopted with inner core and is threaded, and has some groups of grooves on the pawl bell and spigot joint lower circumference wall, and leaf spring places in the pawl bell and spigot joint groove, and card covers on the leaf spring.The part of the outstanding pawl bell and spigot joint groove of card is topped bar to form with the groove on core grabber cover top and is cooperated.On airtight head, thrust ring bottom outer wall has annular groove to thrust ring by dowel fixes, and an open wedge steel loop part places in this groove, and another part matches with step in the core grabber cover.Open wedge steel loop end face excircle diameter is greater than bottom surface excircle diameter, and its width of open wedge steel loop is smaller or equal to the thrust ring bottom outer wall annular groove degree of depth.
Advantage of the present utility model is: the utility model compact conformation, easy for installation, and execute-in-place is simple, and that has improved special formation and the less rock core of diameter grabs heart reliability.
Description of drawings
Fig. 1 the utility model structural representation.
Specific embodiments
Be described further below in conjunction with accompanying drawing.
A kind of sealing core drilling is as described in Figure 1 grabbed center device, mainly is made up of pawl bell and spigot joint (1), card (2), leaf spring (3), core grabber cover (4), thrust ring (5), open wedge steel loop (6), core grabber (7), airtight head (8).Pawl bell and spigot joint (1) top is adopted with inner core and is threaded, have some groups of grooves on pawl bell and spigot joint (1) the lower circumference wall, leaf spring (3) places in pawl bell and spigot joint (1) groove, card (2) covers on the leaf spring (3), and the part of outstanding pawl bell and spigot joint (1) groove of card (2) is topped bar to form with the groove on core grabber cover (4) top and cooperated.On airtight head (8), thrust ring (5) bottom outer wall has annular groove to thrust ring (5) by dowel fixes, and open wedge steel loop (a 6) part places in this groove, and another part matches with the interior step of core grabber cover (4).Open wedge steel loop (6) end face excircle diameter is greater than bottom surface excircle diameter, and its width of open wedge steel loop (6) is smaller or equal to thrust ring (5) the bottom outer wall annular groove degree of depth.
Concrete operation method is: after the upper suspension system installs, assemble the airtight heart assembly that cuts of inner core bottom again.Earlier with thrust ring (5) by dowel fixes on airtight head (8), open wedge steel loop (6) is installed on the thrust ring (5), core grabber (7) is gently placed in the core grabber cover (4), again core grabber cover (4) is enclosed within on mounted airtight head (8) and thrust ring (5), the open wedge steel loop (6) together with core grabber (7), at last pawl being overlapped assembly is enclosed within on the pawl bell and spigot joint (1), be stuck in the groove of core grabber cover (4) up to card (2) correspondence, be located by connecting.Then according to the method for operation in operation of general sealing core drilling.
Heart operation is cut at the scene: carry drilling tool on slowly behind the mill heart, do not cut that the heart shows or under uncertain condition if having, but turn on pump is elevated to pump pressure that to promote inner core behind the certain value descending.Inner core promotes thrust ring (5), thrust ring (5) is at the effect lower compression open wedge steel loop (6) of following thrust, enter behind open wedge steel loop (6) undergauge in thrust ring (5) the outer wall groove, continuing to press down thrust ring (5) enters in the core grabber cover (4), and promote the descending undergauge of core grabber (7), tightly embrace rock core.
Claims (1)
1. a sealing core drilling is grabbed center device, mainly forms (8) by pawl bell and spigot joint (1), card (2), leaf spring (3), core grabber cover (4), thrust ring (5), open wedge steel loop (6), core grabber (7), airtight head; Pawl bell and spigot joint (1) top is adopted with inner core and is threaded, it is characterized in that: have some groups of grooves on pawl bell and spigot joint (1) the lower circumference wall, leaf spring (3) places in pawl bell and spigot joint (1) groove, card (2) covers on the leaf spring (3), and the part of outstanding pawl bell and spigot joint (1) groove of card (2) is topped bar to form with the groove on core grabber cover (4) top and cooperated; On airtight head (8), thrust ring (5) bottom outer wall has annular groove to thrust ring (5) by dowel fixes, and open wedge steel loop (a 6) part places in this groove, and another part matches with the interior step of core grabber cover (4); Open wedge steel loop (6) end face excircle diameter is greater than bottom surface excircle diameter, and its width of open wedge steel loop (6) is smaller or equal to thrust ring (5) the bottom outer wall annular groove degree of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201591770U CN201439692U (en) | 2009-07-07 | 2009-07-07 | Closed core taking and grabbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201591770U CN201439692U (en) | 2009-07-07 | 2009-07-07 | Closed core taking and grabbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201439692U true CN201439692U (en) | 2010-04-21 |
Family
ID=42544362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201591770U Expired - Lifetime CN201439692U (en) | 2009-07-07 | 2009-07-07 | Closed core taking and grabbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201439692U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331548A (en) * | 2018-02-07 | 2018-07-27 | 中国石油集团西部钻探工程有限公司 | Coring guarantor's type device based on lining |
-
2009
- 2009-07-07 CN CN2009201591770U patent/CN201439692U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331548A (en) * | 2018-02-07 | 2018-07-27 | 中国石油集团西部钻探工程有限公司 | Coring guarantor's type device based on lining |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201486515U (en) | Switch type releasing packer | |
| CA2436588A1 (en) | Hydraulic jar device | |
| CN109138880B (en) | Bidirectional anchor | |
| CN104120998A (en) | Suspension packer for gas well layered exploitation | |
| CN201439692U (en) | Closed core taking and grabbing device | |
| CN201794527U (en) | Casing float collar | |
| CN201884003U (en) | Large-diameter shearing suspended tubing drain | |
| CN201474645U (en) | Oil and gas well head ball catching device | |
| CN201620820U (en) | Novel dual-slip packer | |
| CN204082061U (en) | Fracture used high-pressure sand-proof hydraulic anchor | |
| CN2841949Y (en) | Reverse differential pressure anchor packer | |
| CN2916104Y (en) | Hydraulic oil pipe anchoring tools | |
| CN206158638U (en) | Mechanical type oil pipe anchor | |
| CN201016402Y (en) | Deposition-proof uniflow valve | |
| CN201090573Y (en) | Oil pump base fix screw | |
| RU55857U1 (en) | PACKER PLUG | |
| CN202596664U (en) | Wellhead backflow preventer | |
| CN201756941U (en) | Mechanical releasing shallow-shaft tubing plug | |
| CN201306144Y (en) | Wellhead sealing device for oil-water well | |
| CN203961928U (en) | Open-hole horizontal well acid cleaning filling device | |
| CN203097777U (en) | Oil field down-hole pipe string draining type hydraulic oil pipe anchor | |
| CN212406668U (en) | Combined type anchoring slip | |
| CN201110153Y (en) | Machine for blowout prevention of non casing thread oil water well head | |
| RU58159U1 (en) | PACKER-TAIL | |
| CN202596629U (en) | Composite magnetic-bar-type grit barrel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100421 |