8/10/2019 Us 5865253 http://slidepdf.com/reader/full/us-5865253 1/7
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 1/7
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 2/7
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 3/7
U.S.
Patent F e b . 2 , 1 9 9 9 S h e e t 1 o f 2 5 865 253
F I G .
1
P r l o r A r t
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 4/7
5 , 8 6 5 , 2 5 3
F I G . 25
F e b .
2 , 1 9 9 9 S h e e t
2 0 f 2
F 5 .
24
U . S .
P a t e n t
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 5/7
5 , 8 6 5 , 2 5 3
1
WELLBORE OVERSHOT
BACKGROUND
OF
THE INVENTION
1 .
F i e l d
o f t h e I n v e n t i o n
The
p r e s e n t i n v e n t i o n i s
d i r e c t e d
t o W e l l b o r e
o v e r s h o t s
a n d , i n
o n e
p a r t i c u l a r a s p e c t ,
t o
o v e r s h o t s
f o r
t u b i n g .
I n
o n e
s p e c i ? c embodiment
t h e
p r e s e n t
i n v e n t i o n
i s d i r e c t e d t o
a n
o v e r s h o t f o r
e n g a g i n g a n d r e t r i e v i n g
c o l l a p s e d c o i l e d t u b
i n g .
2 .
D e s c r i p t i o n
o f R e l a t e d
A r t
The
p r i o r
a r t d i s c l o s e s a Wide v a r i e t y o f W e l l b o r e o v e r
s h o t s
f o r e n g a g i n g a n d
r e t r i e v i n g
t u b u l a r s a n d o t h e r
“ ? s h ”
u s e d
i n
a W e l l b o r e . O f t e n
i n
u s i n g c o i l e d
t u b i n g ,
t h e t u b i n g
c o l l a p s e s . T h e r e
h a s l o n g been a need f o r a n o v e r s h o t
u s e f u l
i n a W e l l b o r e t o e f f e c t i v e l y e n g a g e a n d r e t r i e v e
c o l l a p s e d
c o i l e d t u b i n g .
FIG. 1 s h oWs
a p r i o r a r t overshot 10
With
an o u t e r cover
s l e e v e
2 0 ,
a
m a n d r e l 30
d i s p o s e d s u b s t a n t i a l l y
W i t h i n
t h e
c o v e r
s l e e v e 2 0 ,
a n d
a
body
member
40
d i s p o s e d W i t h i n
t h e
cover s l e e v e 20 o p p o s i t e t h e mandrel
3 0 .
One o r
more
s e t
screWs 21 s e c u r e s t h e mandrel 30 Within t h e cover
s l e e v e
2 0 .
A o W e r end 22 o f t h e c o v e r s l e e v e
20 p r o j e c t s
d oWn beloW
a loWer end 31
o f t h e
mandrel
30
and a loWer end 41
o f
t h e
body member 4 0 .
P r e f e r a b l y
t h e l o W e r e n d 22
o f
t h e c o v e r
s l e e v e i s
s i Z e d
a n d d i s p o s e d f o r
e n c o m p a s s i n g
a
t o p
o f
c o l l a p s e d
c o i l e d
t u b i n g o r o f
a ? s h .
A
o p
e n d 32 o f
t h e
m a n d r e l 30 h a s
a
t h r e a d e d p o r t i o n
f o r
r e l e a s a b l y c o n n e c t i n g
t h e
o v e r s h o t
t o
a Work
t r i n g . The
body member
40
h a s a n
upper s h o u l d e r 42 t h a t
a b u t s
a
loWer
s h o u l d e r 33
o f t h e
m a n d r e l 3 0 . An a l i g n m e n t
p i n
1 1 e X t e n d s t h r o u g h t h e b o d y
member 40
a n d
t h e m a n d r e l 3 0 .
A l u r a l i t y o f s l i p s 6 0 a r e
e a c h m o v a b l y
d i s p o s e d
i n
a
c o r r e s p o n d i n g
s l i p
c h a n n e l 4 3
o f
t h e
b o d y
member
4 0 .
A
p r i n g
6 1
b i a s e s
e a c h
s l i p
doWn
W a r d l y .
A p o r t i o n o f e a c h s p r i n g 6 1 e X t e n d s t h r o u g h a s p r i n g
c h a n n e l
6 3
i n e a c h
s l i p
body 6 2 . The m a n d r e l 30
h a s
a n
i n n e r
W a l l
35 W i t h u p W a r d l y
d i r e c t e d
t e e t h 3 6 . Each
l i p
6 0 h a s a n
o u t e r s u r f a c e 6 4 W i t h u p W a r d l y d i r e c t e d t e e t h
6 5 .
The i n n e r
W a l l
35
o f
t h e mandrel 30 and
a n
i n n e r
W a l l 45 o f
t h e body
member
40 de?ne a s p a c e S
i n t o
Which p a r t o f a ?sh o r
c o i l e d t u b i n g
may
p r o j e c t f o r g r i p p i n g b e t W e e n t h e
m a n d r e l
30
a n d
t h e s l i p s 6 0 . Each
l i p
6 0
h a s
a l o W e r i n c l i n e d
s u r f a c e
66
Which c o r r e s p o n d s t o
and r i d e s
on
a loWer i n c l i n e d
s u r f a c e 4 6 o f
e a c h
s l i p
c h a n n e l
4 3 o f t h e body
member
4 0 .
Each
s l i p
60 h a s a n upper
i n c l i n e d
s u r f a c e 68 Which
c o r r e
s p o n d s t o a n d r i d e s
a g a i n s t
a n u p p e r
i n c l i n e d
s u r f a c e
48
o f
t h e
s l i p c h a n n e l s 4 3 . Each
s l i p
6 0
h a s a l o W e r i n c l i n e d
s u r f a c e
80
a g a i n s t
Which
a
?sh
o r t u b i n g
may
push
o r
b e
p u s h e d
t o
p u s h
t h e s l i p
u p i n i t s
s l i p
c h a n n e l
t h e r e b y
p e r m i t t i n g t h e ?sh
o r
t u b i n g t o e n t e r i n t o t h e s p a c e
S
betWeen a s l i p
and t h e i n n e r
W a l l o f t h e
mandrel
s o
t h a t t h e
? s h o r
t u b i n g
may
b e g r i p p e d t h e r e b e t W e e n .
The
s l i p s a r e
s i Z e d s o
t h a t
t h e y c a n n o t e X i t t h e i r s l i p c h a n n e l s i n t o t h e
s p a c e S and c a n n o t f a l l o u t o f t h e o v e r s h o t . Ashoulder 6 9 o f
e a c h s l i p a b u t s a s h o u l d e r
4 9
o f
t h e
body member
o
p r e v e n t
f u r t h e r
u p W a r d
s l i p m o v e m e n t .
A
o i n t e d e n d
3 7
o f
t h e
m a n d r e l
30 a n d
a p o i n t e d e n d
47
o f t h e body member
40
f a c i l i t a t e r e c e p t i o n
o f a
?sh o r t u b i n g
W i t h i n
t h e
o v e r s h o t
and
movement o f t h e ?sh o r t u b i n g i n t o t h e s p a c e
S .
SUMMARY OF THE PRESENT INVENTION
T h e
p r e s e n t i n v e n t i o n ,
i n c e r t a i n
e m b o d i m e n t s ,
d i s c l o s e s
a n o v e r s h o t a p p a r a t u s f o r e n g a g i n g a n d
r e t r i e v i n g
t u b u l a r s .
I n
o n e
a s p e c t ,
s u c h
a n a p p a r a t u s
i s
u s e f u l W i t h c o l l a p s e d
c o i l e d
t u b i n g .
T h e p r e s e n t i n v e n t i o n ,
i n
c e r t a i n e m b o d i m e n t s , d i s c l o s e s
a n o v e r s h o t f o r e n g a g i n g a n d r e t r i e v i n g a c o l l a p s e d c o i l e d
1 5
25
35
45
55
6 5
2
t u b i n g i n
a
W e l l b o r e , t h e
o v e r s h o t h a v i n g a
body
member
W i t h
a
t o p ,
a
b o t t o m , and
a body
c h a n n e l t h e r e t h r o u g h
from
t o p t o b o t t o m ,
t h e
body member h a v i n g a t
l e a s t
o n e
s l i p
c h a m b e r , a t l e a s t o n e
s l i p
movably
d i s p o s e d
i n t h e a t l e s t o n e
s l i p c h a m b e r
o f
t h e
body member
t h e a t
l e a s t o n e
s l i p
movable on
a t
l e a s t
one
i n c l i n e d
r a i l
i n t h e
a t
l e a s t
one
s l i p
c h a m b e r
s o t h a t , upon c o n t a c t i n g
t h e
c o l l a p s e d c o i l e d
t u b i n g ,
u p W a r d movement o f
t h e
b o d y member r e s u l t s
i n
doWnWard movement o f t h e a t l e a s t one s l i p Which a l s o
moves t h e
a t
l e a s t
o n e s l i p
i n W a r d l y
i n
t h e
body
member
t h e r e b y i n c r e a s i n g g r i p p i n g f o r c e
o f t h e a t l e a s t o n e
s l i p
o n
t h e
c o l l a p s e d
c o i l e d t u b i n g ; s u c h a n o v e r s h o t W h e r e i n
t h e
a t
l e a s t
o n e s l i p i s tWo opposed s l i p s , a ? r s t s l i p a n d a s e c o n d
s l i p o p p o s i t e
t h e ? r s t
s l i p , e a c h s l i p i n
a
s l i p
c h a m b e r
i n
t h e
body member e a c h s l i p movably mounted o n a t
l e a s t
o n e
i n c l i n e d r a i l ; s u c h a n o v e r s h o t Wherein t h e a t l e a s t one s l i p
i s a t h i r d
s l i p a n d
a
f o u r t h s l i p o p p o s i t e t h e
t h i r d
s l i p , e a c h
i n a s l i p
c h a m b e r
i n t h e body member a n d
movably mounted
on t
l e a s t
one i n c l i n e d r a i l , t h e t h i r d and f o u r t h s l i p s l o W e r
t h a n t h e ? r s t
a n d s e c o n d s l i p s ; a n y
s u c h o v e r s h o t W i t h a
b e a r i n g b o d y c o n n e c t e d t o t h e b o d y m e m b e r , t h e b e a r i n g
body
r o t a t a b l y c o n n e c t i b l e
t o a n o t h e r member
b e t W e e n t h e
body member a n d t h e a n o t h e r member; s u c h
a n o v e r s h o t
Wherein t h e
a t
l e a s t
one
s l i p
h a s
a t o o t h e d o u t e r g r i p p i n g
s u r f a c e t o f a c i l i t a t e g r i p pi n g o f
t h e c o l l a p s e d c o i l e d
t u b i n g .
I n c e r t a i n a s p e c t s , t h e p r e s e n t i n v e n t i o n d i s c l o s e s
a n
o v e r s h o t f o r e n g a g i n g
a n d
r e t r i e v i n g
a
c o l l a p s e d c o i l e d
t u b i n g i n
a
W e l l b o r e , t h e
o v e r s h o t h a v i n g a
body
member
W i t h
a
t o p ,
a
b o t t o m , and
a body
c h a n n e l t h e r e t h r o u g h from
t o p t o
b o t t o m ,
t h e b o d y member h a v i n g f o u r s l i p c h a m b e r s ,
t W o p a i r s
o f s l i p s , o n e p a i r a b o v e
t h e
o t h e r , e a c h s l i p
m o v a b l y d i s p o s e d i n t h e s l i p c h a m b e r o f t h e b o d y m e m b e r ,
e a c h s l i p
movable o n tWo
i n c l i n e d r a i l s i n i t s s l i p
chamber
s o
t h a t ,
u p o n
c o n t a c t i n g
t h e
c o l l a p s e d c o i l e d
t u b i n g ,
u p W a r d
movement
o f t h e body member r e s u l t s
i n doWnWard move
ment o f t h e s l i p s Which a l s o moves t h e s l i p s i n W a r d l y i n t h e
b o d y
member
t h e r e b y
i n c r e a s i n g g r i p p i n g
f o r c e
o f t h e s l i p s
o n t h e
c o l l a p s e d c o i l e d
t u b i n g , a n d
e a c h
s l i p r e m o v a b l y
h e l d
i n
i t s
r e s p e c t i v e s l i p
c h a m b e r
b y a r e l e a s a b l e s t o p m e m b e r ,
a n d
e a c h s l i p h a v i n g
a
t o o t h e d o u t e r g r i p p i n g s u r f a c e
t o
f a c i l i t a t e g r i p p i n g o f t h e c o l l a p s e d c o i l e d
t u b i n g .
I n
c e r t a i n a s p e c t s , t h e p r e s e n t i n v e n t i o n
d i s c l o s e s
a
m e t h o d f o r e n g a g i n g c o l l a p s e d
c o i l e d t u b i n g
i n a W e l l b o r e
W i t h a n o v e r s h o t ,
t h e
method i n c l u d i n g
i n t r o d u c i n g
a n
o v e r s h o t i n t o a W e l l b o r e
t o
c o n t a c t t h e
c o l l a p s e d c o i l e d
t u b i n g i n t h e W e l l b o r e , t h e
o v e r s h o t h a v i n g
a b o d y member
W i t h a t o p , a b o t t o m , and a body c h a n n e l
t h e r e t h r o u g h
from
t o p
t o
b o t t o m ,
t h e
b o d y
member
h a v i n g
t W o
s l i p
c h a m b e r s ,
t W o
s l i p s
e a c h
m o v a b l y d i s p o s e d i n e a c h s l i p c h a m b e r o f
t h e
body
member
e a c h s l i p
movable on
a n i n c l i n e d
r a i l
i n a
c o r r e s p o n d i n g s l i p
c h a m b e r s o
t h a t , u p o n c o n t a c t i n g t h e
t u b i n g ,
u p W a r d movement
o f t h e
b o d y
member
r e s u l t s i n
doWnWard movement
f
t h e s l i p s Which a l s o
moves
h e s l i p s
i n W a r d l y i n t h e b o d y m e m b e r
t h e r e b y
i n c r e a s i n g g r i p p i n g
f o r c e o f
t h e
s l i p s
o n t h e
c o l l a p s e d c o i l e d
t u b i n g ,
e n g a g i n g
t h e
t u b i n g W i t h
t h e
o v e r s h o t ,
a n d r e m o v i n g t h e
o v e r s h o t a n d
t u b i n g from t h e W e l l b o r e ; s u c h a method
Wherein
a holloW
s u b i s c o n n e c t e d t o t h e
t o p
o f
t h e
o v e r s h o t
f o r
r e c e i v i n g
a
p o r t i o n
o f
t h e
c o l l a p s e d
c o i l e d t u b i n g a n d
t h e
m e t h o d a l s o
i n c l u d i n g r e c e i v i n g
a
p o r t i o n
o f
t h e c o l l a p s e d c o i l e d t u b i n g
i n
t h e
h o l l o W s u b .
I t
i s ,
t h e r e f o r e ,
a n
o b j e c t
o f
a t
l e a s t
c e r t a i n
p r e f e r r e d
embodiments
o f t h e p r e s e n t
i n v e n t i o n
t o p r o v i d e :
NeW s e f u l , u n i q u e , e f ? c i e n t , n o n o b v i o u s
W e l l b o r e o v e r
s h o t
d e v i c e s and
methods
f o r t h e i r u s e ;
Such
a n o v e r s h o t
Which e f f e c t i v e l y e n g a g e s and
h o l d s
c o i l e d
t u b i n g ;
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 6/7
5 , 8 6 5 , 2 5 3
3
Such a n
o v e r s h o t
Which e f f e c t i v e l y e n g a g e s and
h o l d s
c r u s h e d
o r
c o l l a p s e d
c o i l e d
t u b i n g ; a n d
Such an
overshot Which has
one
o r
more
movable
s l i p s f o r
e n g a g i n g a n d
s e c u r i n g c o i l e d t u b i n g .
C e r t a i n embodiments
o f t h i s i n v e n t i o n
a r e n o t l i m i t e d
t o
a n y
p a r t i c u l a r
i n d i v i d u a l
f e a t u r e d i s c l o s e d h e r e ,
b u t i n c l u d e
c o m b i n a t i o n s
o f t h e m d i s t i n g u i s h e d
f r o m
t h e p r i o r a r t i n
t h e i r
s t r u c t u r e s
and
f u n c t i o n s . F e a t u r e s o f t h e i n v e n t i o n
have
b e e n b r o a d l y d e s c r i b e d s o t h a t t h e d e t a i l e d
d e s c r i p t i o n s
t h a t
f o l l o W may b e
b e t t e r
u n d e r s t o o d , a n d i n o r d e r t h a t
t h e
c o n t r i b u t i o n s o f t h i s i n v e n t i o n t o t h e a r t s may be b e t t e r
a p p r e c i a t e d .
T h e r e a r e ,
o f c o u r s e , a d di t i o n a l a s p e c t s
o f t h e
i n v e n t i o n d e s c r i b e d
beloW
a n d Which may e i n c l u d e d
i n
t h e
s u b j e c t
m a t t e r o f
t h e
c l a i m s
t o
t h i s
i n v e n t i o n . Those s k i l l e d
i n t h e a r t W h o h a v e t h e b e n e ? t o f
t h i s
i n v e n t i o n , i t s
t e a c h i n g s ,
a n d
s u g g e s t i o n s W i l l
a p p r e c i a t e t h a t
t h e
c o n c e p
t i o n s
o f
t h i s d i s c l o s u r e may e used a s a c r e a t i v e b a s i s f o r
d e s i g n i n g o t h e r
s t r u c t u r e s , m e t h o d s a n d s y s t e m s f o r
c a r r y i n g
o u t a n d
p r a c t i c i n g
t h e
p r e s e n t
i n v e n t i o n .
The c l a i m s o f t h i s
i n v e n t i o n a r e
t o b e
r e a d
t o i n c l u d e any l e g a l l y e q u i v a l e n t
d e v i c e s o r methods Which d o
n o t d e p a r t
from
t h e
s p i r i t a n d
s c o p e
o f
t h e
p r e s e n t
i n v e n t i o n .
The p r e s e n t i n v e n t i o n
r e c o g n i Z e s
a n d a d d r e s s e s t h e
p r e v i o u s l y - m e n t i o n e d p r o b l e m s
a n d
l o n g - f e l t n e e d s a n d
p r o v i d e s a s o l u t i o n
t o t h o s e
p r o b l e m s
a n d
a
s a t i s f a c t o r y
m e e t i n g o f
t h o s e
n e e d s i n i t s v a r i o u s
p o s s i b l e
e m b o d i m e n t s
and e q u i v a l e n t s t h e r e o f .
To
one s k i l l e d i n t h i s
a r t
W h o h a s
t h e
b e n e ? t s o f t h i s i n v e n t i o n ’ s r e a l i Z a t i o n s ,
t e a c h i n g s ,
d i s c l o s u r e s , a n d
s u g g e s t i o n s , o t h e r
p u r po s e s a n d a d v a n t a g e s
W i l l b e
a p p r e c i a t e d f r o m
t h e f o l l o W i n g d e s c r i p t i o n o f
p r e
f e r r e d e m b o d i m e n t s ,
g i v e n
f o r
t h e
p u r p o s e
o f
d i s c l o s u r e ,
When
a k e n
i n
c o n j u n c t i o n
W i t h t h e
a c c o m p a n y i n g d r a W i n g s .
The
d e t a i l
i n
t h e s e d e s c r i p t i o n s
i s
n o t i n t e n d e d
t o
t h W a r t
t h i s
p a t e n t ’ s
o b j e c t t o c l a i m t h i s i n v e n t i o n no
m a t t e r
h o W o t h e r s
may
l a t e r
d i s g u i s e i t by v a r i a t i o n s i n f o r m o r a d d i t i o n s o f
f u r t h e r
i m p r o v e m e n t s .
DESCRIPTION OF THE
DRAWINGS
A ore
p a r t i c u l a r
d e s c r i p t i o n
o f embodiments
o f
t h e
i n v e n t i o n
b r i e ? y
s u m m a r i Z e d
a b o v e
may
b e h a d by r e f e r
ences
t o t h e embodiments
Which a r e sh oWn
i n t h e
draWings
Which f o r m a p a r t o f
t h i s
s p e c i ? c a t i o n . T h e s e d r a W i n g s
i l l u s t r a t e c e r t a i n p r e f e r r e d
embodiments
and a r e n o t t o be
u s e d t o i m p r o p e r l y l i m i t t h e s c o p e o f t h e i n v e n t i o n
Which
may
h a v e
o t h e r e q u a l l y
e f f e c t i v e
o r l e g a l l y e q u i v a l e n t
embodiments.
F I G .
1 i s a
s i d e vieW
i n c r o s s - s e c t i o n o f a p r i o r o v e r s h o t .
FIGS. 2A nd
2B r e
s i d e vieWs
i n c r o s s - s e c t i o n o f an
o v e r s h o t a c c o r d i n g
t o t h e p r e s e n t
i n v e n t i o n . F I G . 2C
s
a
t o p
c r o s s - s e c t i o n
vieW
o f
t h e o v e r s h o t
o f
F I G .
2A.
DESCRIPTION
OF EMBODIMENTS
PREFERRED
AT
THE
TIME OF FILING FOR
THIS PATENT
FIGS. 2A—2C shoW a n o v e r s h o t 100 a c c o r d i n g
t o
t h e
p r e s e n t i n v e n t i o n
W i t h a body 1 0 2 s e c u r e d W i t h p i n s
1 0 3
t o
a r o t a t a b l e
member
1 0 4 . The
member
104 s r o t a t a b l e
W i t h
r e s p e c t t o
a n u p p e r
s u b
105
on
b e a r i n g s
106
d i s p o s e d
b e t W e e n t h e
b u s h i n g
104
a n d u p p e r s u b 1 0 5 . The s u b 1 0 5
a n d
a n y
h o l l o W
t u b u l a r ( s )
a b o v e
i t
may
“ s W a l l o W ”
p a r t
o f
a
c o l l a p s e d c o i l e d t u b i n g .
A
o W e r
body 1 0 6
i s
s e c u r e d
W i t h p i n s
1 0 7
t o
t h e body
1 0 2 .
AdoWnWardly
x t e n d i n g l i p o r
p r o ? l e 1 0 8
o n t h e
l o W e r
body 1 0 6 f a c i l i t a t e s e n t r y
o f a ? s h
o r c o l l a p s e d t u b i n g
i n t o
a
c h a n n e l 1 0 9
t h a t e X t e n d s
t h r o u g h t h e
body 1 0 2 . F l u i d
i s
10
1 5
25
35
45
6 5
4
?oWable
t h r o u g h
t h e
o v e r s h o t
1 0 0
t h r o u g h
a
c h a n n e l
1 1 0
o f
t h e u p p e r s u b 1 0 5 ,
a
c h a n n e l
1 1 1 o f
t h e c o n n e c t o r 1 0 4 , t h e
c h a n n e l 1 0 9
o f
t h e
body 1 0 2 ,
a n d
a
c h a n n e l
1 1 2 o f
t h e
l o W e r
body
1 0 6 . The
body
1 0 2 i s g e n e r a l l y c y l i n d r i c a l
a s
a r e
t h e
v a r i o u s c h a n n e l s mentioned a b o v e .
An
u p p e r
s l i p
p a i r
1 2 0
i n c l u d e s
m o v a b l e
s l i p
members
121 and 122 Which a r e movable i n chambers 123 and 1 2 4 .
S t o p b l o c k s 1 2 5 ,
1 2 6
s e c u r e d t o
t h e
body 1 0 2 W i t h
b o l t s
o r
p i n s
1 3 8
h o l d
t h e movable
l i p members
on
i p s
o r r a i l s 130
t h a t p r o j e c t i n t o r e c e s s e s 127 on e a c h
s l i p .
LoWer s l i p
members 1 2 8 , 1 2 9 a r e l i k e t h e s l i p members 1 2 1 , 1 2 2 a n d
move
i n chambers
1 6 3 , 1 6 4 . As shoWn i n F I G . 2 C , e a c h
movable
s l i p
member
may have
a s e r r a t e d o r t o o t h e d o u t e r
s u r f a c e
140 t o
f a c i l i t a t e
g r i p p i n g
o f
a ?sh
o r
t u b i n g .
As shoWn i n F I G . 2 A , t h e m o v a b l e s l i p members 1 2 1 ,
1 2 2 , 1 2 8 , 1 2 9
a r e
i n i t i a l l y
i n a n
“ u p ”
p o s i t i o n i n t h e i r
r e s p e c t i v e c h a m b e r s .
As
t h e
o v e r s h o t
100 moves doWn a n d
e n c o u n t e r s and engages
a
?sh
o r t u b i n g ,
p a r t o f t h e ?sh
o r
t u b i n g moves up i n
t h e c h a n n e l
109 and may
mo v e i n t o
t h e
s u b 1 0 5 . Once t h e
? s h
o r
t u b i n g
i s
g r i p p e d b e t W e e n t h e p a i r s
o f
s l i p s a n d
a n
u p W a r d p u l l i s a p p l i e d
t o
t h e o v e r s h o t , t h e
body
102 may move upWardly W i t h
r e s p e c t t o t h e
?sh
o r
t u b i n g
t h e r e i n . I f
t h e
?sh o r
t u b i n g moves
doWn
W i t h
r e s p e c t
t o t h e body 1 0 2 ,
t h e movable
l i p members move doWn
W i t h
t h e ?sh o r
t u b i n g
a n d , a s t h e y
m ove
doWn t h e i r g r i p on t h e
? s h
o r
t u b i n g
i n c r e a s e s i n f o r c e
d u e
t o t h e g e n e r a l l y i n W a r d
movement o f t h e
movable
l i p
members a s t h e y
mo v e
doWn
( s e e s l i p
member
p o s i t i o n i n F I G . 2 B ) . T h e i n W a r d move
ment
o f
t h e
movable
s l i p members
i s
e f f e c t e d
b y t h e
i n c l i n a t i o n
o f
t h e l i p s o r r a i l s 1 3 0 , t h e i n c l i n a t i o n
o f
t h e s l i p
c h a m b e r s ,
a n d t h e c o r r e s p o n d i n g
i n c l i n e d
r e a r
s u r f a c e
1 7 0
o f e a c h
s l i p a n d
i n c l i n e d i n n e r s u r f a c e s
1 7 2 o f
e a c h
c h a m b e r .
I n c o n c l u s i o n , t h e r e f o r e ,
i t
i s
s e e n
t h a t
t h e p r e s e n t
i n v e n
t i o n
and t h e embodiments d i s c l o s e d he r e i n
and
t h o s e cov
e r e d by
h e
a p p e n d e d c l a i m s a r e W e l l a d a p t e d t o c a r r y o u t
t h e
o b j e c t i v e s
a n d
o b t a i n
t h e e n d s s e t
f o r t h . C e r t a i n c h a n g e s
c a n
b e made i n t h e s u b j e c t m a t t e r W i t h o u t d e p a r t i n g f r o m t h e
s p i r i t a n d
t h e
s c o p e o f t h i s i n v e n t i o n . I t i s r e a l i Z e d t h a t
c h a n g e s
a r e p o s s i b l e W i t h i n t h e s c o p e o f t h i s i n v e n t i o n
a n d
i t i s
f u r t h e r
i n t e n d e d t h a t e a c h e l e m e n t o r s t e p
r e c i t e d
i n any
o f
t h e
f o l l o W i n g c l a i m s
i s t o b e
u n d e r s t o o d
a s r e f e r r i n g t o a l l
e q u i v a l e n t e l e m e n t s o r s t e p s
The
f o l l o W i n g c l a i m s a r e
i n t e n d e d t o c o v e r t h e
i n v e n t i o n a s
b r o a d l y
a s
l e g a l l y
p o s s i b l e
i n W h a t e v e r form t may
b e u t i l i Z e d .
The
i n v e n t i o n c l a i m e d
h e r e i n i s neW and
n o v e l i n
a c c o r d a n c e W i t h 35 U . S . C . § 102
a n d s a t i s ? e s t h e c o n d i t i o n s f o r p a t e n t a b i l i t y i n § 1 0 2 . The
i n v e n t i o n
c l a i m e d
h e r e i n
i s
n o t
o b v i o u s
i n
a c c o r d a n c e
W i t h
3 5
U . S . C . §
1 0 3 a n d
s a t i s ? e s
t h e
c o n d i t i o n s
f o r p a t e n t a b i l i t y
i n § 1 0 3 . T h i s s p e c i ? c a t i o n
a n d
t h e c l a i m s
t h a t
f o l l o W a r e i n
a c c o r d a n c e W i t h a l l o f t h e r e q u i r e m e n t s o f 3 5 U . S . C .
§
1 1 2 .
W hat s
c l a i m e d
i s :
1 . An
o v e r s h o t f o r e n g a g i n g a n d
r e t r i e v i n g
a c o l l a p s e d
c o i l e d t u b i n g
i n a
W e l l b o r e , t h e o v e r s h o t c o m p r i s i n g
a body member W i t h a
t o p ,
a b o t t o m , and a body c h a n n e l
t h e r e t h r o u g h f r o m t o p
t o b o t t o m ,
t h e b o d y member
h a v i n g a t l e a s t
o n e
s l i p c h a m b e r ,
a t l e a s t o n e s l i p movably d i s p o s e d i n
t h e a t
l e a s t o n e s l i p
c h a m b e r
o f
t h e b o d y m e m b e r ,
t h e a t l e a s t
one s l i p
movable on a t l e a s t
one
i n c l i n e d
r a i l
i n t h e
a t
l e a s t o n e s l i p
chamber
s o
t h a t , upon
c o n t a c t i n g
t h e
c o l l a p s e d
c o i l e d t u b i n g ,
u p W a r d
movement
o f
t h e
body
member r e s u l t s i n doWnWard movement o f
t h e a t
l e a s t one s l i p Which a l s o moves t h e a t l e a s t one s l i p
i n W a r d l y i n
t h e
b o d y m e m b e r t h e r e b y i n c r e a s i n g g r i p
p i n g
f o r c e o f t h e a t
l e a s t
o n e
s l i p on h e c o l l a p s e d c o i l e d
t u b i n g .
8/10/2019 Us 5865253
http://slidepdf.com/reader/full/us-5865253 7/7
5 , 8 6 5 , 2 5 3
5
2 . The o v e r s h o t o f
c l a i m
1 wherein t h e a t
l e a s t
one l i p i s
t W o
o p p o s e d
s l i p s , a ? r s t
s l i p a n d
a
s e c o n d
s l i p
o p p o s i t e
t h e
? r s t
s l i p , e a c h s l i p
i n a
s l i p
c h a m b e r
i n
t h e
b o d y
m e m b e r ,
e a c h s l i p movably mounted
on
a t l e a s t one i n c l i n e d r a i l .
3 .
The
o v e r s h o t
o f c l a i m 2 , t h e a t
l e a s t
o n e s l i p f u r t h e r
c o m p r i s i n g
a t h i r d
s l i p
a n d
a
f o u r t h
s l i p
o p p o s i t e
t h e
t h i r d
s l i p
a n d a
f o u r t h s l i p ,
e a c h i n a
s l i p chamber i n t h e
body
member and
movably mounted
on
t
l e a s t one
i n c l i n e d r a i l ,
t h e
t h i r d
a n d
f o u r t h
s l i p s
l o W e r t h a n
t h e ? r s t a n d s e c o n d
s l i p s .
4 .
The o v e r s h o t
o f c l a i m
1
f u r t h e r c o m p r i s i n g
a
b e a r i n g b o d y c o n n e c t e d
t o
t h e b o d y m e m b e r , t h e
b e a r i n g
body r o t a t a b l y c o n n e c t i b l e t o a n o t h e r member b e t W e e n
t h e body
member a n d
t h e a n o t h e r m e m b e r .
5 . The o v e r s h o t
o f c l a i m
1 Wherein h e a t l e a s t
o n e
s l i p
h a s
a
t o o t h e d
o u t e r g r i p p i n g s u r f a c e t o f a c i l i t a t e g r i p p i n g
o f
t h e
c o l l a p s e d
c o i l e d t u b i n g .
6 .
An
o v e r s h o t f o r
e n g a g i n g
a n d
r e t r i e v i n g
a c o l l a p s e d
c o i l e d t u b i n g
i n a W e l l b o r e ,
t h e o v e r s h o t c o m p r i s i n g
a body
member W i t h
a
t o p ,
a b o t t o m , and a body c h a n n e l
t h e r e t h r o u g h f r o m t o p
t o
b o t t o m , t h e b o d y
member
h a v i n g f o u r
s l i p
c h a m b e r s ,
t W o p a i r s o f s l i p s , o n e p a i r a b o v e t h e o t h e r ,
e a c h s l i p
m o v a b l y d i s p o s e d i n t h e s l i p c h a m b e r o f t h e b o d y
member e a c h s l i p movable on tWo i n c l i n e d r a i l s
i n
i t s
s l i p
c h a m b e r
s o t h a t , u p o n c o n t a c t i n g t h e c o l l a p s e d
c o i l e d
t u b i n g , u p W a r d movement o f t h e b o d y
member
r e s u l t s
i n
doWnWard
movement o f
t h e
s l i p s
Which a l s o
moves t h e
s l i p s i n W a r d l y
i n t h e b o d y
member
t h e r e b y
i n c r e a s i n g g r i p p i n g f o r c e o f t h e s l i p s o n t h e c o l l a p s e d
c o i l e d t u b i n g , a n d
10
1 5
3O
6
e a c h
s l i p
r e m o v a b l y h e l d
i n
i t s
r e s p e c t i v e s l i p
c h a m b e r b y
a
r e l e a s a b l e s t o p member a n d e a c h s l i p
h a v i n g a
t o o t h e d o u t e r g r i p p i n g s u r f a c e t o f a c i l i t a t e g r i p p i n g
o f
t h e
c o l l a p s e d c o i l e d
t u b i n g .
7 .
A ethod f o r e n g a g i n g c o l l a p s e d c o i l e d
t u b i n g
i n a
W e l l b o r e
W i t h a n
o v e r s h o t ,
t h e method c o m p r i s i n g
i n t r o d u c i n g an overshot
i n t o a
Wellbore
t o
c o n t a c t t h e
c o l l a p s e d
c o i l e d t u b i n g i n t h e
W e l l b o r e ,
t h e
o v e r s h o t
c o m p r i s i n g
a body
member W i t h
a
t o p ,
a
b o t t o m ,
and a
b o d y c h a n n e l t h e r e t h r o u g h f r o m t o p
t o
b o t t o m , t h e
b o d y
member h a v i n g
t W o s l i p
c h a m b e r s ,
t W o
s l i p s e a c h
m o v a b l y
d i s p o s e d i n e a c h s l i p
c h a m b e r
o f t h e
b o d y
member each s l i p
movable on a n
i n c l i n e d r a i l i n a
c o r r e s p o n d i n g s l i p c h a m b e r s o t h a t , u p o n c o n t a c t i n g
t h e t u b i n g , u p W a r d movement o f t h e b o d y
member
r e s u l t s
i n
doWnWard movement
o f
t h e
s l i p s
Which a l s o
moves t h e
s l i p s i n W a r d l y
i n t h e b o d y
member
t h e r e b y
i n c r e a s i n g g r i p p i n g f o r c e o f t h e s l i p s o n t h e c o l l a p s e d
c o i l e d t u b i n g ,
e n g a g i n g
t h e
t u b i n g W i t h
t h e
o v e r s h o t , a n d
r e m o v i n g
t h e o v e r s h o t a n d t u b i n g
f r o m
t h e W e l l b o r e .
8 . The method o f c l a i m 7 Wherein a holloW s u b
i s
c o n n e c t e d
t o
t h e
t o p o f
t h e
o v e r s h o t
f o r
r e c e i v i n g a p o r t i o n
o f t h e c o l l a p s e d
c o i l e d
t u b i n g a n d
t h e
m e t h o d
f u r t h e r
c o m p r i s i n g
r e c e i v i n g a p o r t i o n o f
t h e
c o l l a p s e d c o i l e d t u b i n g i n
t h e
h o l l o W s u b .
Related Documents
