CN205135492U - Automatic corer of totally closed stealthy claw - Google Patents

Abstract

The utility model discloses a fully enclosed invisible claw automatic coring device. A core drill liner is located between the core drill, an inner core casing shoe and a clam box shell; one end of the clam box shell is inserted into the core drill liner and the inner core sleeve. Between the pipe shoes, the other end is inserted between the inner core pipe joint and the outer pipe joint; the core spring claw is set on the inner core casing, and the core spring claw is located between the core drill bit liner and the clam box shell protrusion The fully enclosed baffle valve is located between the shell of the clam box and the cam ring; a compression spring is arranged between the cam ring and the snap ring of the inner pipe; the inner core pipe joint is connected with the cam ring and the inner core casing; the utility model It makes up for the difficulty of coring in the prior art. After coring, the tool needs to be reassembled and debugged before continuing to work, which seriously delays the exploration cycle. It is extremely convenient to use.

Description

A Fully Enclosed Invisible Claw Automatic Coring Device

technical field

The utility model relates to the application technical field of petroleum geological exploration, lithology analysis, geological exploration auxiliary tools and coring tools, in particular to a fully enclosed invisible claw automatic coring device.

Background technique

Before drilling oil and gas wells and developing reservoirs, in order to accurately hit the target and collect parameters for the drill bit, it is first necessary to understand the rock properties such as the drillability of the block and the anisotropy of the rock; in order to understand the distribution of oil and gas resources in the downhole formation , reserves, and better design of oil and gas development plans, it is also necessary to drill cores in different underground layers. It can be seen that a reasonable geological exploration plan and accurate downhole rock sample property parameters are important to oil and gas production.

In order to obtain accurate downhole geological data, specially designed coring tools are essential. At present, the coring tools for geological drilling in my country are simple in structure and poor in practicability, and it is difficult to meet the coring requirements of alternating soft and hard strata.

Disadvantages of existing technology

There is a significant generation gap between the existing coring tools for geological exploration in my country and the international advanced technology, which is mainly manifested in:

1. Poor stratum adaptability, it is difficult to meet the coring requirements of alternating hard and soft strata. The specific description is as follows: the existing geological exploration coring tools in my country are mainly divided into two types according to the different structures of the core claws, which are respectively clamp-type core claw corers and grab-type core claw corers. Clamp-type core claws are suitable for coring in hard formations. When the core is not columnar, the column is loose and the strength is not high, or the core is thin, it cannot grasp the downhole core. One-grab core claws are suitable for coring in soft formations. When encountering hard formations with high core strength and dense columnar structures, the core claws cannot be retracted, and the core-taking task cannot be completed.

2. The existing tool has a single structure, and the inner core tube has no radial restriction on the core, which may easily cause the core to slip and cause the coring operation to fail.

3. The structure design of the outer tube is unreasonable. During the coring process, it is easy to move longitudinally along with the core claws, resulting in the failure of the working structure of the core claws.

Utility model content

The prior art is difficult to meet people's production and living needs. In order to solve the deficiencies in the prior art, the utility model aims to design a fully enclosed invisible claw automatic corer.

In order to achieve this technical purpose, the technical solution adopted by the utility model is: a fully enclosed invisible claw automatic core remover, including a core drill bit, a core drill bit liner, an inner core casing shoe, a clam box shell, a core spring claw, Fully enclosed flapper valve, clam box snap ring, cam ring, compression spring, inner pipe snap ring, inner core pipe joint, inner core casing, slotted countersunk head screw, O-ring seal, slip lower slide, Inner pipe slip sliding rod, short arm rod, self-adaptive inner pipe slip, long arm rod, slip upper slider, inner pipe slip push spring, outer pipe joint, rock core and automatic coring device reassembly rod; The core bit liner is located between the core bit, the inner core casing shoe and the clam box shell; one end of the clam box shell is inserted between the core bit liner and the inner core casing shoe, and the other end is inserted into the inner core pipe joint and the outer pipe joint; the core snap claw is set on the inner core casing, and the core snap claw is located between the core drill bit liner and the clam box shell protrusion; the fully enclosed stop The plate valve is located between the clam box shell and the cam ring; a compression spring is arranged between the cam ring and the inner pipe snap ring; the inner core pipe joint is connected with the cam ring and the inner core casing; the inner pipe snap The ring and the inner core pipe joint are connected by slotted countersunk screws; the slip lower slide is set on the slotted side of the inner core casing; the core is set in the middle of the device.

Further, the inner pipe slip sliding rod is inserted into the inner core casing through the slip lower slider; the inner pipe slip sliding rod is provided with a slip upper slider, and the slip upper slider is connected with An inner pipe slip push spring is set between the inner core casings, and the inner pipe slip push spring is sleeved on the inner pipe slip sliding rod; the long arm rod connects the slip upper slider and the self-adaptive inner pipe slip ; The short arm connects the slip lower slider and the self-adaptive inner pipe slip.

Further, an O-ring is provided between the inner core pipe joint and the inner core casing.

Compared with the prior art, the utility model has the following beneficial effects: the fully enclosed invisible claw automatic coring device, the fully enclosed clam box assembly automatically closes the clam box during the coring process, that is, by forcing the fully enclosed baffle valve to The fulcrum is the center and turns inwards, and is completely closed at the pivot point. In this way, a closed chamber is created to avoid the failure of coring operations caused by loose rock samples.

The shell limit assembly restricts the longitudinal displacement of the inner core casing shoe by eating into the core snap claw of the lower core; then restricts the longitudinal displacement of the outer pipe assembly through the clam box snap ring. The significance of this is to limit the longitudinal displacement of unrelated components during core extraction on the inner core barrel.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a partially enlarged view of I in Fig. 1 .

Fig. 3 is a structural schematic diagram of the utility model when in use.

Fig. 4 is a schematic diagram of the structure of the reassembly rod of the automatic core remover of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to the accompanying drawings 1-4 of the specification. In the embodiment of the utility model, a fully enclosed invisible claw automatic coring device includes a core bit 01, a core bit liner 02, an inner core casing shoe 03, a clam box shell 04, Rock core spring claw 05, fully enclosed baffle valve 06, clam box snap ring 07, cam ring 08, compression spring 09, inner pipe snap ring 10, inner core pipe joint 11, inner core casing 12, slotted countersunk head Screw 13, O-ring seal 14, slip lower slider 15, inner tube slip sliding rod 16, short arm lever 17, self-adaptive inner tube slip 18, long arm lever 19, slip upper slider 20, inner tube slip Pipe slip push spring 21, outer pipe joint 22, rock core 23 and automatic corer reassembly rod 24; the core drill bit liner 02 is located between the core drill bit 01, the inner core casing shoe 03 and the clam box shell 04; One end of the clam box shell 04 is inserted between the core drill liner 02 and the inner core casing shoe 03, and the other end is inserted between the inner core pipe joint 11 and the outer pipe joint 22; On the inner core casing 12, and the core snap claw 05 is located between the core drill liner 02 and the protruding part of the clam box shell 04; the fully enclosed baffle valve 06 is located between the clam box shell 04 and the cam ring 08; a compression spring 09 is arranged between the cam ring 08 and the inner pipe snap ring 10; the inner core pipe joint 11 and the cam ring 08 are connected with the inner core casing 12; the inner pipe snap ring 10 It is connected with the inner core pipe joint 1 through a slotted countersunk screw 13; the slip lower slide 15 is set on the slotted side of the inner core casing 12; the core 23 is set in the middle of the device.

Further, the inner pipe slip sliding rod 16 is inserted into the inner core casing 12 through the slip lower slider 15; the inner pipe slip sliding rod 16 is provided with a slip upper slider 20, and the slip An inner tube slip push spring 21 is arranged between the tile upper slider 20 and the inner core casing 12, and the inner tube slip push spring 21 is sleeved on the inner tube slip sliding rod 16; The shoe upper slider 20 and the self-adaptive inner pipe slip 18; the short arm bar 17 connects the slip lower slider 15 and the self-adaptive inner pipe slip 18.

Further, an O-ring seal 14 is arranged between the inner core pipe joint 11 and the inner core casing 12 .

The utility model when in use:

1. Align the threaded hole at one end of the short arm with the threaded hole of the slip lower slider, and fix them with bolts and nuts on both sides.

2. Align the threaded hole at one end of the long arm with the internal threaded hole of the upper slider of the slips, and fix them with bolts and nuts on both sides.

3. Align the threaded hole at the other end of the long arm with the threaded hole at the other end of the short arm, and the inner threaded hole of the self-adaptive inner tube slip base, and fix them with screws and nuts on both sides respectively.

4. The components in steps 1-3 adopt clearance fits to ensure that the self-adjusting wall group can realize stretching and contraction movements.

5. In the self-adaptive slip group assembled in steps 1-4, put the slip upper slider and slip lower slider on the slip rod of the inner tube, and slide the inner tube slip on the top of the slip upper slider The inner pipe slip push spring on the rod outer cover.

6. Insert the sliding rod of the inner pipe slips assembled in steps 1-5 into the keyway of the inner core casing.

7. According to steps 1-6, assemble the other 3 sets of evenly distributed self-adaptive inner pipe slip assemblies in sequence.

8. Arrange an O-ring seal at the groove of the middle diameter section of the inner core casing.

9. Align the threaded hole of the inner core pipe joint with the threaded hole of the inner pipe snap ring, and fix it with GB/TB68-2000 countersunk head screws.

10. Preload the compression spring and arrange it in the inner space at the lower end of the inner core pipe joint.

11. With the inner cone of the cam ring facing down, insert it into the inner space at the lower end of the inner core pipe joint from bottom to top.

12. Put the tip of the fully enclosed baffle valve upwards, fix the bottom threaded hole and the threaded hole of the clam box shell with screws, and make the fully enclosed baffle valve close to the inner wall of the clam box shell.

13. Repeat step 12 to complete the assembly of the remaining 3 evenly distributed baffle valves.

14 Connect and tighten the lower outer diameter end of the inner core pipe joint assembly assembled in steps 9-11 with the larger inner diameter end of the clam box shell assembly assembled in steps 12-13.

15. Appropriately expand the core spring claw and put it on the inner truncated cone surface of the inner core casing shoe.

16. Connect and tighten the internal thread of the small outer diameter end of the fully enclosed clam box assembly assembled in step 14 with the external thread of the cone section of the inner core casing shoe.

17. In the casing shoe assembly assembled in step 16, connect and tighten the large outer diameter section of the casing shoe and the small outer diameter end of the clam box shell with the inner thread of the core drill liner.

18. In the drill bit liner assembly assembled in step 17, the outer thread of the drill bit liner is connected with the inner thread of the core drill bit and tightened.

19 Arrange the clam box snap ring in the upper annular space of the core bit and the clam box shell.

20 Connect and tighten the external thread of the small outer diameter end of the outer pipe joint with the internal thread of the large inner diameter end of the core drill bit.

21 Lower the inner core casing assembly assembled in steps 1-6 into the inner pipe joint so that the fully enclosed baffle valve is hidden in the annulus between the shell of the clam box and the thin-walled extension pipe of the inner core casing; The spring claw is hidden in the annulus formed by the extension of the end of the inner core casing, the shell of the clam box and the inner core casing shoe; the outer tapered surface extending from the end of the inner core casing is in contact with the inner tapered surface of the inner core casing shoe.

For those skilled in the art, however, the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any minor modifications, equivalent replacements and improvements made to the above embodiments according to the technical essence of the present utility model shall be included in the Within the scope of protection of the technical solution of the utility model.

Claims (3)

1. A fully enclosed invisible claw automatic coring device, including a core bit, a core bit liner, an inner core casing shoe, a clam box shell, a core spring claw, a fully enclosed baffle valve, a clam box snap ring, and a cam Ring, compression spring, inner tube snap ring, inner core tube joint, inner core sleeve, slotted countersunk screw, O-ring, slip lower slide, inner tube slip slide rod, short arm rod, self-adaptive Inner pipe slips, long arm rods, slip upper sliders, inner pipe slip push springs, outer pipe joints, rock cores and automatic coring device reassembly rods; it is characterized in that: the core drill liner is located at the core drill, Between the inner core casing shoe and the clam box shell; one end of the clam box shell is inserted between the core drill liner and the inner core casing shoe, and the other end is inserted between the inner core pipe joint and the outer pipe joint; the The core retaining claw is arranged on the inner core casing, and the core retaining claw is located between the core drill bit liner and the protruding part of the clam box shell; the fully enclosed baffle valve is located between the clam box shell and the cam ring between; the cam ring and the inner pipe snap ring are provided with a compression spring; the inner core pipe joint is connected with the cam ring and the inner core casing; the inner pipe snap ring and the inner core pipe joint are slotted Countersunk head screw connection; the lower slide of the slip is set on the grooved side of the inner core casing; the core is set in the middle of the device. 2. A fully enclosed invisible claw automatic core remover according to claim 1, characterized in that: said inner pipe slip sliding rod is inserted into the inner core casing through the slip lower slide; The sliding rod of the pipe slip is provided with a slip upper slider, and an inner pipe slip push spring is arranged between the slip upper slider and the inner core casing, and the inner pipe slip push spring is sleeved on the inner pipe slip on the sliding rod; the long arm connects the slip upper slider and the self-adaptive inner pipe slip; the short arm connects the slip lower slider and the self-adaptive inner pipe slip. 3. A fully enclosed invisible claw automatic core remover according to claim 1, characterized in that: an O-ring is arranged between the inner core pipe joint and the inner core casing.