Name: DRILLING SAFETY 101
Uploaded: 2022-07-11
Duration: 26 min 45 s
Description: ili. WIRELINE CORE BARREL “SET UP” & MAINTENANCE.

ili. WIRELINE CORE BARREL “SET UP” & MAINTENANCE. 

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WIRELINE CORE BARREL “SET UP” & MAINTENANCE

Therrell Hannah, SE US Field Sales Representative

National Drilling Association – Southeast Chapter Meeting – Greensboro, NC – July 14, 2022

[Audio] My name is Therrell Hannah . I am a SE Field representative for Central Mine Equipment Company. Tonight I will be covering set up and maintenance of a wireline core barrel. The illustrations shown cover parts and components of a standard WL or Q style barrel. I hope that this presentation will be helpful to you and your company in the future when rock coring projects arise.. 

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INTRODUCTION WIRELINE CORE BARREL “SET UP” & MAINTENANCE

Therrell Hannah Presently working as a SE US field sales representative for Central Mine Equipment Company. Worked in the drilling industry for 42 years. Today presenting a short presentation covering wireline core barrel maintenance and "set up." With increasing equipment cost and the labor shortages in the drilling industry, it's very important to educate the industry and assist in making companies more efficient with their operations.

[Audio] I would like to acknowledge the reference materials used for this presentation .. 

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CME Wireline Core Barrel and Maintenance Manual ASTM Publication D-2113 : Standard Practice for Rock Core Drilling and Sampling of Rock for Site Investigation Diamond Core Drillers Handbook Longyear Diamond Products Field Manual Christensen Diamond Products Rod Torque Guidelines DCDMA Technical Manual

[Audio] We will begin with an overview of conventional and wireline core barrels from ASTM D- 2113. This is a great resource pertaining to core drilling operations and coring equipment.. 

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This summary standard is issued under the fixed designation ASTM D 2113-99; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. Scope This practice covers the guidelines, requirements, and procedures for core drilling, coring, and sampling of rock for the purposes of site investigation. The borehole could be vertical, horizontal, or angled. This practice is described in the context of obtaining data for the design, construction, or maintenance of structures, and applies to surface drilling and drilling from exploratory tunnels. This practice applies to core drilling in hard and soft rock. This practice does not address considerations for core drilling for geo environmental site characterization and installation of water quality monitoring devices (see Section 2). Title of this document means only that the document has been approved through the ASTM consensus process.

Designation : ASTM D 2113-99 STANDARD PRACTICE FOR ROCK CORE DRILLING & SAMPLING OF ROCK FOR SITE INVESTIGATION

[Audio] Core barrels generally come in 5ft or 10ft core run lengths. Inner tube extensions are available to extend core barrels up to 20ft core run lengths. Most rock coring operations are performed with casing and core barrels whose sizes have been standardized by the DCDMA.. 

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Core barrels generally come in 5- or 10-ft core run lengths. Ten-foot core runs can be performed with good rock conditions. If soft, friable, or highly fractured formations are encountered, it may be necessary to select barrels with 5-ft core runs to reduce the possibility of blockages and improve core recovery. Important design components of a conventional core barrel are tube type (triple, double, or single), inner tube rotation (rigid or swivel), core bit type, including fluid discharge locations (internal discharge – contacting core, or face. 6.4 Hole Diameters : Most rock coring operations are performed with casing and core barrels whose sizes have been standardized by the Diamond Core Drill Manufacturers Association (DCDMA).

[Audio] ASTM D 2113 recognizes various types of conventional barrels , as well as wireline core barrels.. 

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ASTM D 2113  (continued) CORE BARREL TYPES

Rigid Double Tube Barrel Swivel Type Double Tube Barrels Triple Tube Core Barrels Conventional Barrel Standardized Designs – DCDMA standardized Conventional barrels come in three designs, WG, WM and WT series. The "G" series barrels are the most simple in design and have a simple pin threaded bit into which the core lifter is inserted. The "M" design core barrel. The "T" series design stands for thin walled or thin kerf. Large Diameter, Double Tube, Swivel Design Wireline Core Barrels

[Audio] Two common types of core barrels are single tube and double tube barrels. Please note the hangar bearing assembly on the double tube barrel.. 

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FIG. 2 Diagram of Two Types of Core Barrels: (a) Single Tube and (b) Double Tube

[Audio] Figure 3 illustrates the Christensen design NWD- 4 conventional core barrel. This barrel cannot be converted to wireline.. 

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FIG. 3 Typical Double Tube Swivel Type – Conventional Core Barrel

[Audio] The NV and NV- 2 are recognized by the DCDMA , and may be converted to a wireline core barrel. The N designates the size of the barrel and the V designates its a conventional barrel.. 

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SECTION F
to on next page.
PAGE 12
NV
CORE BARREL

F
PAGE
13
NV CORE BARREL
KEY
ITEM
1-23
2
16
4
5
6
7
8
10
II
12
13
14
15
16
17
18
19
20
21
22
23
NV Core Barrel Assembly
Head
Bearing Assembly
Lock Nut
Spindle Assembly
shut Off Valve 2-req.
Valve Adjusting Washer
Batl Thrust Bearing
Spindle Bearing
Hanger Bearing
Conllyression Spring
Self Lock Nut
Inner Tube Cap Assembly
Grease Fitting
Steel Ball
Check Valve Body
Inner Tube
Stop Ring
Core Lifter
Core Lifter Case
outer Tube
It Stabilizer
Thread Protector
CORE BARREL

[Audio] The NV-2 cuts a 2" core with a box to pin thread inner tube . The NV cuts a 1- 7/8: core size and has a pin to pin thread inner tube. The outer tubes are the same.. 

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SECTION
PAGE
NV2
9
Refer to Key on next page.
CORE BARREL

SECTION
NV2 CORE BARREL
PAGE
NV2
10
KEY
ITEM
1-23
2
4- 16
4
5
6
7
8
9
10
II
12
13
14
15
16
17
18
19
20
21
22
23
NV 2 Core Barrel Assemble-y
Head
Bearing Assembly
Lock Nut
Spindle Assembly
Shut Off Valve 2•eq.
Valve Adjusting Washer 2•eq.
Ball Thrust Bearing
Spindle Bearing
Hanger Bearing
Compression Spring
Self Lock Nut
Inner Tube Cap Assembly
Grease Fitting
Steel Ball
Check Valve Body
Inner Tube Cap Assembly
Stop Ring
Core Lifter
Core Lifter Case
Outer Tube
It Stabilizer
Thread Protector
CORE BARREL

[Audio] The DCDMA Technical Manual illustrates the conversion of an NV conventional core barrel to an NWL wireline core barrel. The WL designates the barrel is a wireline core barrel.. 

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— Spearhead PO int
Spiral Pin
U Detent
— Spearhead Base
UPPER HEAD
ASSEMBLY
REPIACES ITEM 2
SECTION F
LOCKING
COUPLING
ADAPTOR
COUPLING
NDING
— LO•Cking Sleeve
Spiral Pin (2)
Set Screw
— O Head
_ Pin
(.25" x 1.75*'
— Lifting Dog Spring
Lifting Dog (2)
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Spring Pin (2)
— Larch Retracting Case
ring
Latch (2)
Upper
Pin
Body //
spring Pin (375' r 2") Fining
Jar
Weldm ent
Wire Rope
Thimbie —
self
Lock —
Eye Bolt
collar
Bearing
N OVERSHOT ASSEMBLY
Lifting Dog Pin
(,5-x 1.9375")
,VWL WIRELINE
CONVERSION

[Audio] The DCDMA also recognizes the conversion of a NV-2 core barrel to NWL- 2 wireline core barrel.. 

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PAGE
1
UPPER HEAD
ASSEMBLY
REPLACES ITEM 2
SECTION F
[0 CKI.VG
COUPLING
LA NDING
COUPLING
LANDING
NV-2 WIRELINE
CONVERSION
N-2 OVERSHOT ASSEMBLY

[Audio] Conversion of the NWL core barrel to NWL-3 core barrel is illustrated on page 13 . Please note the NWL- 2 core barrel cannot be converted to NWL- 3.. 

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SECTION F
ADAPTOR
PISTON PLUG
TUBE LINER
STOP RING
(X)RE LIFTER
CORE LIFTER CASF
PAGE IS
NWL-3 WIRELINE
CONVERSION

[Audio] Per ASTM D- 2113 : Wireline core barrels are essentially a double tube swivel type core barrel.. 

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6.8.6 – Wireline core barrels are essentially a double tube swivel type core barrel. Similar to “m” style conventional barrel (lifter part of inner barrel assembly). 6.8.2 – Wireline coring systems are designed for long life bits with wide kerf and impregnated or surface set diamond bits. The inner core barrel has a dual shut off valve that stops fluid circulation to alert the driller of a core blockage.

[Audio] D- 2113 describes just a few advantages of wireline core barrels including reduction in rod handling time , increased bit life and high core recovery .. 

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6.8.3.1. Significant reduction in rod handling time compared with conventional core barrels. 6.8.3.2 Increased coring bit life with decreased diamond loss. 6.8.3.3 High core recovery. 6.8.3.4 Caving is reduced and rods aid to stabilize the drill hole walls. 6.8.3.5 Rods are flush or near flush both inside and outside and can be used as a temporary casing. 6.8.3.6 Various in-hole instrumentation packages can be used with the system (wireline packer systems). 6.8.3.7 Two inner barrel assemblies can be used for maximum productivity in continuous coring operations.

[Audio] One disadvantage of wireline core barrels are their more expensive cost versus that of a conventional barrel.. 

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6.8.4.1 equipment is more expensive than conventional equipment 6.8.4.2 wireline systems are complicated and operations required additional training

[Audio] Page 17 illustrates the standard and triple tube core sizes available. 

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STANDARD CORE SIZES SIZE CORE DIAMETER HOLE DIAMETER N W/L 1.875" 2.980" NXB 1.875" 2.980" N W/L2 1.995" 2.980" NWD4 2.06" 2.980" H W/L 2.50" 3.782" P W/L 3.345" 4.827" TRIPLE TUBE CORE SIZES N W/L3 1.775" 2.980" H W/L3 2.406" 3.782" P W/L3 3.270" 4.827"

STANDARD NWD4 2.06" NXB 1.875" P W/L 3.345" H W/L 2.50" N W/L2 1.995" N W/L 1.875"

P W/L3 3.270" H W/L3 2.406" N W/L3 1.775" TRIPLE TUBE

[Audio] Various wireline drill rod dimensions are indicates in Table 3. Please note their " nesting" characteristics.. 

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Table 3: Wireline Drill Rod Dimensions Rod Outside Diameter Inside Diameter Gallons Weight Threads Thread Type in. mm in. mm Per 100 ft Per lbm Per Inch Type AQWL A 1.75 44.5 1.375 34.9 7.7 3.3 4 Taper AXWL B 1.813 46 1.5 38.1 9.18 2.8 4 Regular BQWL A 2.188 55.6 1.812 46 13.4 4 3 Taper BXWL B 2.25 57.2 1.906 48.4 14.82 3.8 4 Regular NQWL A 2.75 69.9 2.375 60.3 23 5.2 3 Taper NXWL B 2.875 73 2.391 60.7 23.3 6.8 3 Regular HQWL A 3.5 88.9 3.062 77.8 38.2 7.7 3 Taper HXWL B 3.5 88.9 3 76.2 36.72 8.7 3 Regular PQWL A 4.625 117.5 4.062 103.2             CPWL B 4.625 117.5 4 101.6             A Q Series rods are specific manufacturer's design. B X Series rods are specific manufacturer's design.

[Audio] Please refer to the "hand out" illustrating parts of a wireline core barrel. I will briefly "touch " on a few of the components and their wear characteristics. The spearhead is the upper most component of the inner tube assembly , and acts as the connection to the overshot when retrieving the inner tube. The spearhead should be checked periodically for wear at the point area.. 

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WIRELINE CORE BARREL ASSEMBLY & INSTRUCTIONAL MANUAL

Component Descriptions 1. 	Spearhead  – The Spearhead is the upper most component of the Inner Tube Assembly. The Spearhead acts as the connection between the Core Barrel Assembly and the Overshot when retrieving the Inner Tube. 2. 	Spring Pin  – The Spring Pin links the Spearhead to the Spearhead Base and allows the Spearhead to pivot when outside of the drill rod string. 3. 	Compression Spring  – The Compression Spring applies force to the Detent in the Spearhead Assembly in order to maintain the same axis as the Core Barrel Assembly (straight up) when inside the drill rod string. 4. 	Detent  – The Detent allows the Spearhead to move in three positions. The Detent sits over top of the Compression Spring. Its design locks the Spearhead straight up during drilling and allows the Spearhead to move left or right while handling the Inner Tube.

[Audio] Items 6 thru 15 describe components that make up the latching assembly.. 

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Component Descriptions 5.	 Spearhead Base  – The Spearhead Base connects the Spearhead Assembly to the Latch Retracting Case and bears against the Detent. It's designed to maintain the Spearhead in an upward and centered position during the drilling cycle, while allowing the Spearhead to hinge left or right when handling the Inner Tube. 6.	 Latch Retracting Case  – The Latch Retracting Case connects the Upper Latch Body to the Spearhead Assembly and protects the Upper Latch Body, Latches, Latch Spring, and Latch Support. While being pulled upward, the Latch Retracting Case will mechanically release the Latches from the Locking Coupling so that the Inner Tube Assembly can be pulled out of the hole at the conclusion of the drilling cycle. 7.	 Spring Pin (Note: Set of two)  – The Spring Pin secures the Spearhead Base to the Latch Retracting Case, and acts as a guide between the Upper Latch Body and the Latch Retracting Case.

[Audio] Latches , springs , and roll pins should be inspected often for wear and fatigue.. 

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Component Descriptions 8.	 Latch Spring  – The Latch Spring keeps pressure on the Latch(es). The Latch Spring also prevents the Latch(es) from inadvertently releasing the Inner Tube during the drilling cycle. 9.	 Latch(es)  – The Latch(es) lock the Inner Tube Assembly with the Locking Coupling, keeping the assembly secure. The Latch(es) also lock the Head Assembly so that the Latch Body will rotate with the drill rods. 10.	 Latch Support  – The Latch Support adds strength to the pieces within the Latch(es). The Latch Support also acts as the pivot point for the Latch(es). 11.	 Spring Pin  – The Spring Pin secures the Latch Assembly inside of the Latch Body Structure.

[Audio] Please note item 14 the landing shoulder . The landing shoulder positions the inner tube so length adjustments can be made. If the landing shoulder is not included on the latch body the core barrel will not function. Also mismatched sizing of the landing shoulder and landing ring will cause the core barrel not to function properly. If wear is shown on landing shoulder , it may be "flipped " over to expose a new contact surface toward the landing ring.. 

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Component Descriptions 12. 	Spring Pin  – This smaller Spring Pin secures the Latch Assembly inside of the Latch Body Structure. 13.	 Upper Latch Body  – The Upper Latch Body is the first of a three part series that makes up the entire Latch Body. The Upper Latch Body is responsible for the upper part of the fluid bypass. 14.	 Landing Shoulder  – The Landing Shoulder is the central part of a three part series that makes up the entire Latch Body. The Landing Shoulder positions the Inner Tube so length adjustments can be executed. Also, the Landing Shoulder creates a seal forcing the drilling fluid to bypass through the Upper and Lower Latch Bodies.

[Audio] The lower and upper latch bodies , and the lock nut should be routinely checked for " tightness". Please note when threading the lock nut onto the spindle , the numbered side of the nut should be facing downward. Also the spindle should periodically be inspected for wear , or damage .. 

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Component Descriptions 15. 	Lower Latch Body  – The Lower Latch Body is the final piece of a three part series that makes up the entire Latch Body. The Lower Latch Body threads onto the end of the Upper Latch Body, securing the Landing Shoulder in place. The Lower Latch Body also contains the lower end of the fluid bypass. 16.	 Lock Nut  – The Lock Nut is responsible for locking the adjusted length of the Head Assembly in place. 17.	 Spindle  – The Spindle is the link for most of the Head Assembly components. It is on its axis that the Bearings, the Valves, Compression Springs and the Inner Tube Cap are installed.

[Audio] Shut off valves and washers play a role in restricting water flow when there is a potential core block or full inner tube. The restriction results in an increase in water pressure on the water pressure gauge which alerts the operator of the restriction of water flow. The shut off valves and washers should be inspected before and after every core run.. 

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Component Descriptions 18. 	Shut-off Valve (Note: Set of two)  – Commonly called “The Rubbers”, the Shut­off Valves are made of a special compressible rubber or nylon. The Shut-off Valves are sandwiched between the Valve Adjusting Washers. The role of the two Shut-off Valves is to restrict water flow to the coring bit while rock is exerting pressure inside the Inner Tube during the drilling cycle. This alerts the operator of a potential core block or filled tube. This force compresses the two "Rubbers" restricting water flow to the coring bit. This results in an increase of water pressure. 19.	 Valve Adjusting Washer (Note: Set of two)  – The Valve Adjusting Washers are positioned on the Spindle. The first one sits next to the first Shut-off Valve while the second is located next to the second Shut-off Valve. The role of the Adjusting Washer is to adjust the sensitivity of the valve to restrict water flow to the coring bit.

[Audio] Page 24 describes the functions of the thrust bearing , spindle bearing and hanger bearing. The bearings should routinely be lubricated & checked for any bearing play .. 

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Component Descriptions 20.	 Thrust Bearing  – The Thrust Bearing is a mechanical unit assembly that allows free rotation of the lower part of the Inner Tube Assembly. It is located right below the lowest Valve Adjusting Washer, immediately behind the Spindle Bearing. (Note: The moving part of the Thrust Bearing is always facing away from the Spindle Bearing.) 21.	 Spindle Bearing  – The Spindle Bearing slides onto the Spindle and houses the Thrust Bearing. It separates the Hanger Bearing from the Thrust Bearing and connects the Bearing Assembly to the Inner Tube Cap. 22.	 Hanger Bearing  – The Hanger Bearing fits onto the Spindle below the Spindle Bearing. It consists of three parts being two washers and an open balled section in the middle.

[Audio] The inner tube cap is screwed onto the spindle assembly . The grease fitting allows lube access to the compression spring and hangar bearing. Item 27 the check ball allows for a free decent mode and also prevents any water pressure from entering the inner tube while drilling.. 

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Component Descriptions 25.	 Inner Tube Cap Assembly  – The Inner Tube Cap is screwed onto the Spindle Assembly and protects the Compression Spring and Bearings. A Grease Fitting permits insertion of the grease inside the Inner Tube Cap. 26.	 Grease Fitting (zerk)  – The Grease Fitting or "zerk” allows grease to be inserted into the Inner Tube Cap Assembly. 27.	 Ball  – The Ball serves two purposes. First, while in "free decent mode”, the Ball will allow some of the water in the rod string to flow through the Inner Tube as well as outside of the Inner Tube. Secondly, in a case where a large volume of water is being pumped into the rod string as the Inner Tube is directed toward the bottom, the Ball will seal the water way, forcing all the water being pumped to push the assembly toward the Outer Tube Assembly down the hole. While drilling, the Ball will also seal the waterway, preventing any water pressure from entering the Inner Tube, aiding the upward movement of the rock being drilled inside the Inner Tube.

[Audio] The compression spring allows downward movement of the inner tube and core lifter case to rest on the inside bevel of the bit. This transfers the load of breaking the core from the IT latches to the drill string. It is important not to over tighten the spring , as it will damage the shut off valves and bearings.. 

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Component Descriptions 23.	 Compression Spring  – The Compression Spring is enclosed inside the Inner Tube Cap that is fitted onto the Bearing Assembly. The Compression Spring is located immediately below the Hanger Bearing. While breaking the core at the end of the core run, the Core Lifter Assembly will contact with the inside bevel shoulder in the throat of the core bit. Compression of the Compression Spring will transfer forces onto the Outer Tube and rod string aiding the breakage of the rock right below the Core Lifter Case. 24.	 Lock Nut  – The Lock Nut threads onto the Spindle shaft securing the Compression Spring and the Hanger Bearing against the Spindle Bearing.

[Audio] One way to distinguish an NWL inner tube from NWL- 2 inner tube is to remember that an NWL tube is pin to pin thread and houses a 1- 7/8" core . The NWL-2 tube is box to pin thread and houses a 2" core . These tubes are available in chrome plated or plain steel.. 

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Component Descriptions 28.	 Check Valve Body  – The Check Valve Body holds the ball and connects to the lower side of the Inner Tube Cap. 29.	 Inner Tube  – The Inner Tube is a steel tube threaded on the outside (pin thread) at both ends. It serves the purpose of collecting the core samples. (Note: In some cases, as in NW/L2 style, box and pin will be on the Inner Tube.) 30.	 Stop Ring  – The Stop Ring is inserted inside of the Core Lifter Case after the Core Lifter. The Stop Ring then locks into a groove located inside of the Core Lifter Case. When the Stop Ring is locked into position, it will prevent the Core Lifter from sliding up inside the Inner Tube.

[Audio] The core lifter and lifter case assist in retrieving core. They should be cleaned and oiled after every core run & the lifter should move freely inside the lifter case. If core slippage occurs , it is recommended that the core lifter , core lifter case & stop ring be replaced.. 

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Component Descriptions 31.	 Core Lifter  – The Core Lifter travels within the Core Lifter Case, allowing the core to move smoothly into the Inner Tube. As the core run is completed, or if the rock sample is blocked anywhere inside the Inner Tube, the operator, after stopping the rotation of the drill string, will lift the rod string from the bottom of the hole. This action will slide and tighten the Core Lifter onto the core sample due to its beveled design. A pressure is caused because of this, and then it is exerted on the core allowing the core to break before it slips out. The N style Core Lifter has a scribed line on its outer shell. 32.	 Core Lifter Case  – The Core Lifter Case carries the Core Lifter and Stop Ring. The bevel on the inside of the Core Lifter Case and the outside of the Core Lifter allows the core to enter. When the Inner Tube is raised, the core is locked in place which allows the core to be broken off from the bottom of the hole. The core is then held in the Inner Tube during retrieval.

[Audio] Pictured are a few configurations of core lifters available.. 

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Core Lifters
36037
36038
36247
36440
36490
N w/L2
36078
36090
36248
36422
36420
N w/L3
36117
36118
36491
36492
H WIL
37034
37035
37082
36493
36494
H w/L3
37050
37051
3€A41
36495
36496
p WIL
36186
36187
36497
36498
P w/L3
36190
36191
36499
Standard Slotted
Fluted
Hardfaced
Diamond Coated Slotted
Diamond Coated Fluted
4äää
Standard

[Audio] The top components of the outer tube are the locking coupling , adapter coupling and landing ring. It is important to check that the landing ring is installed into the recessed area located just below the top outer tube thread . The core barrel will not function properly without a landing ring. Also , the landing ring may be flipped over to extend the wear life. The locking coupling is generally equipped with hard facing or carbide on the OD. If these surfaces are worn down , the coupling should be replaced.. 

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Component Descriptions 33.	 Locking Coupling, Tanged  – The Locking Coupling connects drill rods to the Adapter Coupling. 34.	 Adapter Coupling  – The Adapter Coupling is installed at the box end of the Outer Tube locking the Landing Ring in place inside the Outer Tube. The box end of the Drive Coupling is designed to let the Latches fully open which then allows it to lock the Inner Tube Assembly in place. 35.	 Landing Ring  – The Landing Ring is a ring made of hardened steel. The Landing Ring sits inside the box end of the Outer Tube. It acts as a stopping mechanism for the Inner Tube Assembly once the Inner Tube Assembly is pumped or lowered into the Outer Tube. The Landing Ring is reversible, so it can be turned over to double its lifespan.

[Audio] Please note the illustration of just a few different styles of locking couplings available... 

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[Audio] The outer tube is available in chrome and non chrome. The inner tube stabilizer is brass and located inside the reaming shell. The Inner tube stabilizer should not be used as a landing ring .. 

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Component Descriptions 36.	 Outer Tube  – The Outer Tube houses the Landing Ring, Reaming Shell, Inner Tube Stabilizer, Core Bit and Inner Tube Assembly. The Outer Tube, due to its rigidity, is a very important part of the drilling equipment. Different types of Outer Tube are offered to the market depending on the ground conditions. 37.	 Inner Tube Stabilizer  – The Inner Tube Stabilizer plays two important roles. It aligns and stabilizes the Inner Tube inside the Reaming Shell, and allows the drilling fluid to flow freely to the Coring Bit. 38.	 Thread Protector  – The Thread Protector serves to protect the pin end thread of the Outer Tube Assembly. It is part of the assembly while a Core Barrel is being shipped to any distributor or end user. It is a good practice to use the Thread Protector whenever the Core Barrel is stored or in transit between drill projects. The Thread Protector also houses the Inner Tube Stabilizer for shipping.

[Audio] Grouping the inner tube parts , we begin with the spearhead assembly – Stage 1. The purpose of the spearhead is to connect the overshot for inner tube removal.. 

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Spearhead Assembly (Stage 1) The purpose of the Spearhead is to connect to the overshot for Inner Tube retrieval. The Spearhead also acts as a hinge increasing the ease in handling of the Inner Tube Assembly during retrieving operations. Insert the Spring Pin (Item 2) in the appropriate hole on the Spearhead (Item 1), tap in just enough to hold it in place. Place the Compression Spring (Item 3) inside the open end of the Spearhead (Item 1).

[Audio] During assembly of the spearhead , please remember to use proper ppe and tools. Avoid pinch points.. 

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Spearhead Assembly (Stage 1) Place the Detent (Item 4) inside the Spearhead (Item 1) with the pointed end facing away from the Compression Spring (Item 3). The Compression Spring (Item 3) should rest inside the open end of the Detent (Item 4). Use proper personal protective equipment and                         proper tools. Avoid the pinch point. Push the Spearhead Base (Item 5) into the Spearhead (Item 1) so the Detent (Item 4) rests securely in it. Push in the Spearhead Base (Item 5) until the holes in the Spearhead Base (Item 5) and the holes in the Spearhead (Item 1) line up, then drive the Spring Pin (Item 2) through.

[Audio] An completed spearhead assembly is pictured in the lower right.. 

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Spearhead Assembly (Stage 1) Use a 5/6” pin punch to counter sink the Spring (Item 2) on both sides of the Spearhead (Item 1). The Spearhead Assembly (Stage 1) is complete.

[Audio] We will now move to stage 2 the latching assembly. Its purpose is to lock the inner tube in place and connect it to the outer tube. Please remember to install the proper size landing shoulder onto the latch body. The core barrel will not function properly without the proper size landing shoulder .. 

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Latching Assembly (Stage 2) The purpose of the Latching Assembly is to lock the Inner Tube in place when it is lowered down the drilling hole. The Latching Assembly also acts as a mechanism to physically connect the Inner Tube Assembly to the Outer Tube components. The Latching Assembly allows for the passage of drilling fluids during drilling operations and limits the Inner Tube Assembly’s motion within the Core Barrel Assembly. Use proper personal protective equipment and                      proper tools. Avoid the pinch point.  Place the Landing Shoulder (Item 14) onto the Lower Latch Body (Item 15) until it rests on the shoulder.

[Audio] Please remember proper ppe and tools during assembly.. 

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Latching Assembly (Stage 2) Apply grease to the threads of the Upper Latch Body (Item 13) and thread it to the Lower Latch Body (Item 15).Use proper personal protective equipment and                      proper tools. Avoid the pinch point.  Tap the Spring Pin (Item 12) into the appropriate hole in Upper Latch Body (Item 13) just enough to hold it in place. Position the Latch Support (Item 10) inside the Upper Latch Body (Item 13) aligning the holes in both to allow the Spring Pin (Item 12) to be driven through. Use a pin punch if needed to ensure the Spring Pin (Item 12) is flush in the hole.

[Audio] Pages 38 and 39 detail the assembly of the latches , springs and pins.. 

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Latching Assembly (Stage 2) Tap the Spring Pin (Item 11) into the appropriate hole in the Upper Latch Body (Item 13) just enough to hold it in place. Take the Latch Spring (Item 8) and hook the ends into each of the Latches (Item 9). The right hand Latch must be on the bottom or underside when you overlap the latches. Place the assembled Latch spring (Item 8) and Latches (Item 9) into the slot in the Upper Latch Body (Item 13). Hold them together against the Latch Support (Item 10). Use proper personal protective equipment and                     proper tools. Avoid the pinch point.

[Audio] Next slide. 40. WIRELINE CORE BARREL ASSEMBLY & INSTRUCTIONAL MANUAL. 

Scene 40

Latching Assembly (Stage 2) Drive the spring Pin (Item 11) down through the Upper Latch Body (Item 13) and the Latches (Item 9). Use ½ Pin Punch to place the Spring Pin (Item 11) even with or just below the surface of the Upper Latch Body (Item 13). Using some force, slide the Latch Retracting Case (Item 6) over the top of the Upper Latch Body (Item 13). Be certain to push the Latches (Item 9) in with your hand, allowing the Latch Retracting Case (Item 6) to fully slide over the Upper Latch Body (Item 13). When this is done correctly the Latches (Item 9) will pop out of the appropriate slot on the Latch Retracting Case (Item 6). Drive the Spring Pin (Item 7) into the lower hole on the Latch Retracting Case (Item 6). Use a ½ pin punch to ensure that the Spring Pin (Item 7) is flush in the hole.

[Audio] Stage 2 Latching assembly is completed.. 41. 

Scene 41

Latching Assembly (Stage 2) The Latching Assembly (Stage 2) is complete.

[Audio] The bearing assembly , stage 3 separates the rotating components of the inner tube assembly from the static components of the inner tube assembly.. 

Scene 42

Bearing Assembly (Stage 3) The purpose of the Bearing Assembly is to separate the rotating components of the Inner Tube Assembly from the static components of the Inner Tube Assembly. The Latching and Spearhead Assemblies must rotate with the drill string while the remainder of the Inner Tube Assembly remains non-rotational. If the entire Inner Tube Assembly were to rotate, the parts would wear prematurely and cause core blocks inside the inner tube while drilling. Use proper personal protective equipment and                     proper tools. Avoid the pinch point. Place the Spindle (Item 17) in a vice and thread a ½ inch set screw in the end of the Spindle (Item 17) using a ¼ inch Allen wrench.

[Audio] Included in the bearing assembly are the shut off valves , hanger bearing , thrust bearing and spindle bearing. Inspect the valves and bearings after each core run , and lubricate or replace as needed.. 

Scene 43

Bearing Assembly (Stage 3) Thread the Lock Nut (Item 16) onto the Spindle (Item 17) while in the vice. Be certain that the numbered side of the Lock Nut (Item 16) is facing down when threaded on the Spindle (Item 17). This is also where the inner tube adjustment is made. Flip the Spindle (Item 17) over in the vice, and alternately place the two Shut off Valves (Item 18) with the two Valve Adjusting Washers (Item 19) onto the Spindle (Item 17) in the following order: Shut Off Valve (Item 18) Valve Adjusting Washer (Item 19) Shut Off Valve (Item 18) Valve Adjusting Washer (Item 19) Place the Thrust Bearing (Item 20) on the Spindle (Item 17) so it comes to rest with the moving side down against the Valve Adjusting Washer (Item 19).

[Audio] Please note to install the open side of the hanger bearing facing up towards the threads of the spindle.. 

Scene 44

Bearing Assembly (Stage 3) Place the Spindle Bearing (Item 21) on the Spindle (Item 17). It will sit over top of the Thrust Bearing (Item 20) with the threads facing up towards the threads of the Spindle (Item 17). Install the Hanger Bearing (Item 22) on the Spindle (Item 17) with the open side of the Hanger Bearing (Item 22) facing up towards the threads of the Spindle (Item 17). Now place the Compression Spring (Item 23) onto the Spindle (Item 17) so it rests on the Hanger Bearing (Item 22).

[Audio] Do not overtighten the compression spring , as this will cause a pre load on the shut off valves. Also , please be sure to install the check ball in the open end of the inner tube cap.. 

Scene 45

Bearing Assembly (Stage 3) The Lock Nut (Item 24) is now threaded onto the Spindle (Item 17) and tightened with an adjustable wrench until it is snug against the Compression Spring (Item 23). Do NOT overtighten and compress the Compression Spring (Item 23). This will cause a “preload” on the Shut Off Valves (Item 18) and a blocked Inner Tube (Item 29) will be prematurely indicated by the water pressure. Insert the Grease Fitting or “zerk” (Item 26) into the grease fitting socket on the Inner Tube Cap (Item 25) and tighten with the appropriate size socket and ratchet. Place the Ball (Item 27) in the open end of the Inner Tube Cap (Item 25).

[Audio] The lower right image illustrates a completed bearing assembly. Stage 3.. 

Scene 46

Bearing Assembly (Stage 3) Thread the Check Valve Body (Item 28) into the Inner Tube Cap (Item 25) using an adjustable wrench and tighten until wrench tight. Place the Inner Tube Cap Assembly (Item 25) on the Spindle (Item 17) and thread it onto the Spindle Bearing (Item 21). Fill Inner Tube Cap Assembly (Item 25) with grease via the Grease Fitting “zerk” (Item 26). The Bearing Assembly (Stage 3) is complete.

[Audio] Pages 47 thru 49 detail the assembly of stages 1 ,2, and 3 for the final inner tube head assembly .. 

Scene 47

Final Head Assembly The purpose of this assembly is to create the Inner Tube Head Assembly. This is one of the main components of the Wireline Core Barrel Assembly. Use proper personal protective equipment and                     proper tools. Avoid the pinch point. Insert the Spearhead Assembly (Stage 1) into the open end of the Latching Assembly (Stage 2). Drive the remaining Spring Pin (Item 7) into the appropriate hole within the Latch Retracting Case (Item 6) just enough to hold it in place.

[Audio] Next slide. 48. WIRELINE CORE BARREL ASSEMBLY & INSTRUCTIONAL MANUAL. 

Scene 48

Bearing Assembly (Stage 3) After aligning the holes in the Latching Assembly and Spearhead Assembly, finish driving the Spring Pin (Item 7) into the hole until it is flush with Latching Assembly. Place the newly assembled unit in a vice. Thread the Bearing Assembly all the way into the Latching Assembly.

[Audio] Please note the final inner tube head assembly in the lower right hand corner.. 

Scene 49

Bearing Assembly (Stage 3) Tighten the Lock Nut (Item 16) with an adjustable wrench until it is wrench tight. The Final Head Assembly is complete.

[Audio] Be careful not to distort or dent the inner tube during the assembly process of the inner tube head assembly.. 

Scene 50

Inner Tube Assembly The purpose of the Inner Tube Assembly is to serve as a transport mechanism for the core samples. When drilling, the Inner Tube Assembly houses and retains the core. During retrieval, the Inner Tube Assembly protects and transports the core. The Inner Tube Assembly is also a signaling device for the drill operator. Use proper personal protective equipment and                       proper tools. Avoid the pinch point. Secure the Inner Tube (Item 29) in a vice so it will not move. Be careful not to distort or dent the Inner Tube when securing it in the vice.

DRILLING SAFETY 101

Scene 0

I am a SE Field representative for Central Mine Equipment Company.

Tonight I will be covering set up and maintenance of a wireline core barrel.

The illustrations shown cover parts and  components of  a standard WL or Q style barrel.

I hope that this presentation will be helpful to you and your company in the future when rock coring projects arise.

avatar

I would  like to acknowledge the reference materials used for  this presentation .

We will begin with an overview of conventional and wireline core barrels from ASTM D-2113.

This is a great resource pertaining to  core drilling operations  and  coring equipment.

Core barrels generally come in 5ft or 10ft core run lengths.

Inner tube extensions are available to extend core barrels up to 20ft core run lengths.

Most rock coring operations are performed with casing and core barrels whose sizes have been standardized by the DCDMA.

ASTM D 2113 recognizes various types of conventional barrels , as well as wireline core barrels.

Two common types of core barrels are single tube and double tube barrels.

Please note the hangar bearing assembly on the double tube barrel.

Figure 3 illustrates the Christensen design NWD-4 conventional core barrel.

This barrel cannot be converted to wireline.

The NV and NV-2 are recognized by the DCDMA , and may be converted to a wireline core barrel.

The N designates the size of the barrel and the V designates its a conventional barrel.

The NV-2 cuts a 2" core with  a box  to pin thread inner tube .

core size and has a pin to pin thread  inner tube.

The   DCDMA Technical Manual  illustrates  the conversion of an NV conventional core barrel to an NWL wireline core barrel.

The WL designates the barrel is a wireline core barrel.

The DCDMA also recognizes the conversion of a NV-2 core barrel  to NWL-2 wireline core barrel.

Conversion of the NWL core barrel to NWL-3 core barrel is illustrated on page 13 .

Please note the NWL-2 core barrel cannot be converted to NWL-3.

Wireline core barrels are essentially a double tube swivel type core barrel.

D-2113 describes just a few advantages of wireline core barrels including reduction in rod handling time , increased bit life and  high core recovery .

One disadvantage of wireline core barrels are their more expensive cost versus that of a  conventional barrel.

Page 17 illustrates the standard and triple tube core sizes available

Various wireline drill rod dimensions are indicates in Table 3.

Please note their "nesting" characteristics.

Please refer to the  "hand out" illustrating parts of a wireline core barrel.

I will briefly "touch " on a few of the components and their wear characteristics.

The spearhead is the upper most component of the inner tube assembly , and acts as the connection  to the overshot when retrieving the inner tube.

The spearhead should be checked periodically  for wear at the point area.

Items 6 thru 15 describe components  that make up the latching assembly.

Latches , springs , and roll pins  should be inspected often for wear and fatigue.

Please note item 14 the landing shoulder .

The landing shoulder positions the inner tube so length adjustments can be made.