US3055339A - Liquid coating applicator for inner surfaces of pipe strings - Google Patents

Liquid coating applicator for inner surfaces of pipe strings Download PDF

Info

Publication number
US3055339A
US3055339A US91959A US9195961A US3055339A US 3055339 A US3055339 A US 3055339A US 91959 A US91959 A US 91959A US 9195961 A US9195961 A US 9195961A US 3055339 A US3055339 A US 3055339A
Authority
US
United States
Prior art keywords
pipe
plunger
housing
annular
housing member
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
Application number
US91959A
Inventor
Pistole Harry
James L Rike
Garland C Terrel
Delvin J Lefner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jersey Production Research Co
Original Assignee
Jersey Production Research Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jersey Production Research Co filed Critical Jersey Production Research Co
Priority to US91959A priority Critical patent/US3055339A/en
Application granted granted Critical
Publication of US3055339A publication Critical patent/US3055339A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
    • B05C7/06—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work by devices moving in contact with the work
    • B05C7/08—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work by devices moving in contact with the work for applying liquids or other fluent materials to the inside of tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/10—Pipe and tube inside

Definitions

  • This invention relates to liquid coating applicators, and more particularly to wire line apparatus for effectively and uniformly applying a coating of liquid materials to the inside of pipe strings such as are employed in oil and gas wells.
  • Pipe strings employed in the production of oil and gas from wells in the earth often are deleteriously affected by the chemical action of fluids produced therethrough.
  • Various expedients have been used to minimize damage to the pipe strings.
  • compositions of liquidmaterials have been applied to the inner surfaces of pipes for inhibiting corrosion.
  • plastic coatings to the inner surfaces of pipe strings to insulate the pipe strings from the corrosive action of the fluids.
  • the effectiveness of the corrosion inhibitor may be reduced, or the plastic coatings may be damaged during workover operations. Therefore, it is desirable to apply protective plastic or inhibitor coatings to the inner surfaces of well pipes, or to renew such coatings, while the pipes are in place in the well.
  • Prior art apparatus for this purpose is described in U.S. Patent No. 2,941,500 to .lohn G. Adams.
  • an elongated housing of such diameter as to be slidable through a pipe to be coated, and an elongated plunger rod reciprocable within the housing and in telescoping relationship therewith.
  • a plunger is provided at one end of the rod reciprocable in the housing with the rod.
  • the plunger, housing, and plunger rod form a reservoir for the coating liquid.
  • a discharge port is provided at the top end of the housing through which the iluid is ejected to the exterior of the housing, and annular sealing means are provided above and below the port.
  • the upper sealing means is adapted to be in substantially duid-tight sealing engagement with the pipe to be coated, while the lower sealing means is adapted to be in wiping frictional engagement with the pipe so that a thin coating of coating liquid is wiped on the inner surface of the pipe as the housing moves through the pipe.
  • the lower sealing means is further slidable on the housing, and spring means is provided engaging the housing and the lower sealing means so that the lower sealing means is normally biased to cover the discharge port means. As the housing moves through the pipe string, the spring is adapted to yield under the frictional force between the lower sealing means and the inner surface of the pipe so as to uncover the discharge port.
  • a passageway extending through the plunger rod and plunger to equalize pressure above and below the housing, a ilapper valve in the passageway, latch means for holding the apper valve in an open position, and means tripping the latch means when the plunger reaches the upper extremity of its range of movement to release the flapper valve and close the passageway extending through the plunger rod.
  • FIG. 1 is an elevational view, partially in cross section, of an embodiment of the invention in place in a well pipe;
  • FIG. 2 is a view of a portion of the apparatus of FIG. 1 illustrating another operative position thereof;
  • FIG. 3 is a fragmentary cross-sectional View of the piston portion of the apparatus of FIG. l.
  • a well pipe 1 which may be a tubing or casing of an oil and gas well in the earth.
  • An elongated housing adapted to be slidable through the pipe 1 includes a lower, substantially cylindrical housing member 26 which may be termed an enlarged housing section, an upper reduced diameter housing section 14, and a connecting annular shoulder 21 between the reduced section 14 and the enlarged section 26 for connecting together the reduced section and the enlarged section.
  • An upper closure member 7 is provided at the upper end of reduced section 14, and a lower closure member 28 is provided at the lower end of enlarged section 26.
  • Discharge port means 13? in the reduced section 14 provides iluid communication between the exterior and interior of the housing.
  • a piston or plunger 27 and an elongated tubular plunger rod 23 secured to the plunger are disposed within the housing.
  • the plunger rod 23 extends through a bore in the closure means 7 and extends thereabove.
  • the outer diameter of the plunger is slightly less than the inner diameter of the enlarged section 26, and O-rings 51 are affixed to the outer surface of the plunger to provide a iiuid seal between the plunger and the inner surface of the enlarged housing section 26.
  • O-ring 8 provides a fluid seal between the plunger rod 23 and the closure means 7.
  • By-pass ports 5 are provided in the plunger rod above the closure means 7.
  • a wireline socket 3 is axed to the upper end of plunger rod 23 to provide a connection between Wire line 2 and the plunger rod 23.
  • the housing sections 14 and 26, the connecting shoulder 21, the plunger 27, and plunger rody 23 provide a reservoir for liquid corrosion inhibitor or liquid thermosetting plastic ⁇ 25.
  • the plastic may be an epoxy resin mixed with a suitable hardening catalyst therefor and may have a Viscosity of between 5 cps. and 100,000 cps.
  • an Iannular fluidtight sealing means 9 adapted to sealingly engage the inner surface of the pipe 1 so as to Wipe the inner surface of the pipe substantially clean of Well fluid.
  • annular sleeve 17 Positioned below the discharge port 13 is an annular sleeve 17 functioning as a swab ⁇ cup carrier for swab cup 15.
  • a coil spring 19 is positioned between the lower end of sleeve 17 and shoulder 21. Spring 19 normally biases sleeve y17 and swab cup 1S upwardly so that discharge ports 13 are covered to prevent coating liquid from issuing into the annulus between the reduced section 14 and the pipe 1.
  • the spring 19 is yieldable to the frictional opposition of pipe 1 to passage of swab cup 15 through the pipe as the housing is moved upwardly as shown, so as to uncover ports 13 to per-mit coatingliquid to be ejected therethrough.
  • the ilapper valve includes a ring member or annular ange 31 having a central opening therethrough, a llapper 37 pivoted on the ring member, and a spring 35 urging the ilapper 37 to rotate so as to cover the central opening of the ring member 31.
  • the ring member 31 is axed to the plunger 27 by one or more shear pins 33 so as to control uid ow through the bore of the plunger.
  • a recess 39 is provided in the plunger 27 opening into the bore thereof.
  • a latch member 41 centrally pivoted as at 43 is positioned within the recess so that the hooked end thereof engages a catch 38 on apper 37 to hold the flapper away from the central opening of ring member 31 to permit fluid ow therethrough.
  • a coil spring 47 engages latch member 41 at the opposite end thereof from the hooked end, to hold the latch 41 in engagement with the catch 38.
  • an actuating rod ⁇ 45 extends through and above the plunger 27 from the recess 39. When plunger 27 is at the upper end of enlarged section 26, rod 45 engages the shoulder 21 to rotate catch ⁇ 41 and release the apper 37 to close the flapper valve.
  • the housing is filled with coating liquid 2S through fill plug 11, and the flapper 37 is rotated until catch 3S is engaged by latch member 41.
  • the apparatus thereupon is lowered into pipe 1 on wire line 2.
  • Swab cup sleeve 17 will cover ports 13 while the apparatus is being lowered so that the plunger 27 will remain at the bottom of enlarged housing section 26.
  • the apparatus is pulled upwardly through the tubing.
  • Apparatus for depositing a thin liquid iilm on the inner surface of a tubular pipe comprising:
  • an elongated tubular housing member having an enlarged section, a reduced section near its upper end, and a connecting annular shoulder between said reduced section and said enlarged section, said housing member being of such diameter as to be slidable through a pipe to be coated;
  • annular plunger means aixed to one end of said plunger rod, in sealing engagement with the inner wall of the enlarged section of said housing member;
  • discharge port means in said reduced section providing uid communication between the exterior and the interior of said housing member
  • said plunger means being adapted to force liquid disposed between said plunger rod and said housing member through said discharge port means as said plunger rod and said housing member are moved out of telescoping arrangement;
  • annular sealing means slidably fitting around said reduced section and adapted to wipingly engage the pipe to be coated, further adapted to slide longitudinally along said housing member to cover said discharge port means to prevent iluid passage therethrough;
  • a coil spring positioned between said shoulder section and said annular sealing means adapted to urge said annular sealing means into the discharge-portcovering position thereof, said coil spring being adapted to yield to the frictional force of said annular sealing means against the inner surface of said pipe as said housing member is moved through said pipe to uncover said port means;
  • annular huid-tight sealing means aiixed to said housing member above said port means for sliding, substantially fluid-tight sealing engagement with the inner wall of the pipe.
  • Apparatus for depositing a thin liquid ilm on the inner surface of a tubular pipe comprising:
  • an elongated tubular housing member having a reduced section near its upper end, an enlarged section, and a connecting annular shoulder between said reduced section and said enlarged section, said housing member being of such diameter as to be slidable through a pipe to be coated;
  • annular plunger means aixed to one end of said plunger rod, in sealing engagement with the inner wall of the enlarged section of said housing member;
  • discharge port means in said reduced section providing fluid communication between the exterior and the interior of said housing member
  • said plunger means being ⁇ adapted to force liquid disposed between said plunger rod and said housing member through said discharge port means as said plunger rod and said housing member are moved out of telescoping arrangement;
  • annular swab cup carrier in sliding t around said reduced section, adopted to slide longitudinally along said housing member to cover said discharge port means to prevent fluid passage therethrough;
  • a coil spring positioned between said shoulder section and the lower end of said swab cup carrier adapted to urge said swab cup carrier into the dischargeport-covering position thereof;
  • annular swab cup means on said swab cup carrier for wiping frictional engagement with the pipe to uncover said discharge port means against the force of said spring, said swab cup means being adapted to wipe a thin ilm of liquid on the inner surface of the pipe;
  • annular fluid-tight sealing means aixed to said housing member above said port means for sliding, substantially huid-tight sealing engagement with the inner surface of the pipe.
  • Apparatus for depositing a thin liquid film on the inner surface of a tubular pipe comprising:
  • an elongated tubular housing member having a reduced section near its upper end, an enlarged section, and a connecting annular shoulder between said reduced section and said enlarged section, said housing member being of such diameter as to be slidable through a pipe to be coated;
  • annular plunger means aixed to one end of said plunger rod, in sealing engagement with the inner wall of the enlarged section of said housing member;
  • discharge port means in said reduced section providing fluid communication between the exterior and the interior of said housing member
  • said plunger means being adapted to force liquid disposed between said plunger rod and said housing member through said vdischarge port means as said plunger rod and said housing member are moved out of telescoping arrangement;
  • annular swab cup carrier in sliding lit around said reduced section, adapted to cover said discharge port means to prevent fluid passage therethrough;
  • a coil spring positioned between said shoulder section and the lower end of said swab cup carrier adapted to urge said swab cup carrier into the dischargeyportacovering position thereof;
  • annular swab cup means on said swab cup carrier for wiping frictional engagement with the pipe to uncover said discharge port means against the opposition of said spring, said swab cup means being adapted to wipe a thin ilm of liquid on the inner surface of the pipe;
  • annular fluid-tight sealing means aiiixed to said housing member above said port means for sliding, sub- 6 stantially fluid-tight sealing engagement with the inner surface of the pipe;
  • passageway means extending through said plunger means and plunger rod and establishing continuous communication through said housing member to establish equalized .pressure above and below the housing;
  • a apper valve including an annular flange havin-g a central opening therein and a spring-biased apper pivotally supported on said annular flange adapted :to pivot over the opening of said annular flange;
  • shear pin means connecting said flange within said annu-lar plunger means

Description

Sept. 25 1962 H. PlsToLE ETAL LIQUID COATING APPLICATOR AFOR INNER SURFACES OF' PIPE STRINGS Filed Feb. 27, 1961 Stats This invention relates to liquid coating applicators, and more particularly to wire line apparatus for effectively and uniformly applying a coating of liquid materials to the inside of pipe strings such as are employed in oil and gas wells.
Pipe strings employed in the production of oil and gas from wells in the earth often are deleteriously affected by the chemical action of fluids produced therethrough. Various expedients have been used to minimize damage to the pipe strings. For example, compositions of liquidmaterials have been applied to the inner surfaces of pipes for inhibiting corrosion. Additionally, it is known to apply plastic coatings to the inner surfaces of pipe strings to insulate the pipe strings from the corrosive action of the fluids. During the productive life of the wells, the effectiveness of the corrosion inhibitor may be reduced, or the plastic coatings may be damaged during workover operations. Therefore, it is desirable to apply protective plastic or inhibitor coatings to the inner surfaces of well pipes, or to renew such coatings, while the pipes are in place in the well. Prior art apparatus for this purpose is described in U.S. Patent No. 2,941,500 to .lohn G. Adams.
In accordance with the teachings of the present invention, there is provided an elongated housing of such diameter as to be slidable through a pipe to be coated, and an elongated plunger rod reciprocable within the housing and in telescoping relationship therewith. A plunger is provided at one end of the rod reciprocable in the housing with the rod. The plunger, housing, and plunger rod form a reservoir for the coating liquid. A discharge port is provided at the top end of the housing through which the iluid is ejected to the exterior of the housing, and annular sealing means are provided above and below the port. The upper sealing means is adapted to be in substantially duid-tight sealing engagement with the pipe to be coated, while the lower sealing means is adapted to be in wiping frictional engagement with the pipe so that a thin coating of coating liquid is wiped on the inner surface of the pipe as the housing moves through the pipe. The lower sealing means is further slidable on the housing, and spring means is provided engaging the housing and the lower sealing means so that the lower sealing means is normally biased to cover the discharge port means. As the housing moves through the pipe string, the spring is adapted to yield under the frictional force between the lower sealing means and the inner surface of the pipe so as to uncover the discharge port.
In accordance with another aspect of the invention, there is provided a passageway extending through the plunger rod and plunger to equalize pressure above and below the housing, a ilapper valve in the passageway, latch means for holding the apper valve in an open position, and means tripping the latch means when the plunger reaches the upper extremity of its range of movement to release the flapper valve and close the passageway extending through the plunger rod. rillus, the tension in the wire line will suddenly increase when the coating liquid has been substantially entirely ejected through the discharge port means.
Objects and features of the invention not apparent from the above discussion will become evident upon consideration of the following detailed description thereof when 3,055,339 Patented Sept. 25, 1962 taken in connection with the accompanying drawing, wherein:
FIG. 1 is an elevational view, partially in cross section, of an embodiment of the invention in place in a well pipe;
FIG. 2 is a view of a portion of the apparatus of FIG. 1 illustrating another operative position thereof; and
FIG. 3 is a fragmentary cross-sectional View of the piston portion of the apparatus of FIG. l.
With reference now to FIGS. 1 and 2, there is shown a. well pipe 1, which may be a tubing or casing of an oil and gas well in the earth. An elongated housing adapted to be slidable through the pipe 1 includes a lower, substantially cylindrical housing member 26 which may be termed an enlarged housing section, an upper reduced diameter housing section 14, and a connecting annular shoulder 21 between the reduced section 14 and the enlarged section 26 for connecting together the reduced section and the enlarged section. An upper closure member 7 is provided at the upper end of reduced section 14, and a lower closure member 28 is provided at the lower end of enlarged section 26. Discharge port means 13? in the reduced section 14 provides iluid communication between the exterior and interior of the housing.
A piston or plunger 27 and an elongated tubular plunger rod 23 secured to the plunger are disposed within the housing. The plunger rod 23 extends through a bore in the closure means 7 and extends thereabove. The outer diameter of the plunger is slightly less than the inner diameter of the enlarged section 26, and O-rings 51 are affixed to the outer surface of the plunger to provide a iiuid seal between the plunger and the inner surface of the enlarged housing section 26. O-ring 8 provides a fluid seal between the plunger rod 23 and the closure means 7. By-pass ports 5 are provided in the plunger rod above the closure means 7. As the housing is pulled up the pipe 1, fluid in the well pipe i1 above the housing passes through a passageway including ports 5, the bore of the plunger rod 23, and a bore in the plunger 27 (see FIG. 3), so that pressure above and below the housing is substantially equalized. A wireline socket 3 is axed to the upper end of plunger rod 23 to provide a connection between Wire line 2 and the plunger rod 23.
The housing sections 14 and 26, the connecting shoulder 21, the plunger 27, and plunger rody 23 provide a reservoir for liquid corrosion inhibitor or liquid thermosetting plastic `25. The plastic may be an epoxy resin mixed with a suitable hardening catalyst therefor and may have a Viscosity of between 5 cps. and 100,000 cps.
Axed to the top closure means 7 is an Iannular fluidtight sealing means 9 adapted to sealingly engage the inner surface of the pipe 1 so as to Wipe the inner surface of the pipe substantially clean of Well fluid.
Positioned below the discharge port 13 is an annular sleeve 17 functioning as a swab `cup carrier for swab cup 15. The swab `cup wipingly and frictionally engages the inner surface of the pipe string 1 so as to prevent free passage of coating lliquid downwardly therepast, and to wipe a thin coating of coating liquid on the inner surface of the pipe as the housing is moved through the pipe string. A coil spring 19 is positioned between the lower end of sleeve 17 and shoulder 21. Spring 19 normally biases sleeve y17 and swab cup 1S upwardly so that discharge ports 13 are covered to prevent coating liquid from issuing into the annulus between the reduced section 14 and the pipe 1. The spring 19 is yieldable to the frictional opposition of pipe 1 to passage of swab cup 15 through the pipe as the housing is moved upwardly as shown, so as to uncover ports 13 to per-mit coatingliquid to be ejected therethrough.
With reference now to FIG. 3, there is shown a flapper valve in the bore of plunger 27. The ilapper valve includes a ring member or annular ange 31 having a central opening therethrough, a llapper 37 pivoted on the ring member, and a spring 35 urging the ilapper 37 to rotate so as to cover the central opening of the ring member 31. The ring member 31 is axed to the plunger 27 by one or more shear pins 33 so as to control uid ow through the bore of the plunger.
A recess 39 is provided in the plunger 27 opening into the bore thereof. A latch member 41 centrally pivoted as at 43 is positioned within the recess so that the hooked end thereof engages a catch 38 on apper 37 to hold the flapper away from the central opening of ring member 31 to permit fluid ow therethrough. A coil spring 47 engages latch member 41 at the opposite end thereof from the hooked end, to hold the latch 41 in engagement with the catch 38. Above latch member 41 and spring 47. an actuating rod `45 extends through and above the plunger 27 from the recess 39. When plunger 27 is at the upper end of enlarged section 26, rod 45 engages the shoulder 21 to rotate catch `41 and release the apper 37 to close the flapper valve.
In operation, the housing is filled with coating liquid 2S through fill plug 11, and the flapper 37 is rotated until catch 3S is engaged by latch member 41. The apparatus thereupon is lowered into pipe 1 on wire line 2. Swab cup sleeve 17 will cover ports 13 while the apparatus is being lowered so that the plunger 27 will remain at the bottom of enlarged housing section 26. When the apparatus has reached either the bottom of pipe 1 or the lowest depth from which it is desired to apply the coating, the apparatus is pulled upwardly through the tubing. The frictional force between the swab cup 15 vand the inner surface of the pipe 1 immediately will move the sleeve 17 downwardly relative to the housing against the force of spring 19 to open discharge ports 13 so that coating liquid will be ejected into the annulus between the reduced housing section 14 and the pipe 1 as plunger 27 moves upwardly in housing section 26. A thin coating of coating liquid will be wiped on the inner surface of the pipe as the apparatus moves through the pipe. Should the liquid in `the enlarged section 26 become exhausted during application of the coating, as shown in FIG. 2, rod 45 will engage the shoulder Z1 to trip the latch member 41 and :close the flapper valve. Immediately the tension on the wire line 2 will increase and the operator will know that the coating liquid is exhausted. A jar on the apparatus will shear the shear pins 33 to release the flapper valve so that the apparatus may be readily retracted `from the tubing.
The invention is not necessarily to be restricted to the specic structural ydetails or arrangement of parts described above and illustrated in the drawing, as various modications thereof may be effected without departing from the spirit and scope of this invention.
The objects, features, and operation of the invention having been fully described, what we wish to claim is:
1. Apparatus for depositing a thin liquid iilm on the inner surface of a tubular pipe, comprising:
an elongated tubular housing member having an enlarged section, a reduced section near its upper end, and a connecting annular shoulder between said reduced section and said enlarged section, said housing member being of such diameter as to be slidable through a pipe to be coated;
an elongated annular plunger rod in telescoping arrangement within said housing member, said plunger rod being in sliding engagement with the end prtion of said reduced section of said housing member and extending thereabove;
annular plunger means aixed to one end of said plunger rod, in sealing engagement with the inner wall of the enlarged section of said housing member;
discharge port means in said reduced section providing uid communication between the exterior and the interior of said housing member;
said plunger means being adapted to force liquid disposed between said plunger rod and said housing member through said discharge port means as said plunger rod and said housing member are moved out of telescoping arrangement;
annular sealing means slidably fitting around said reduced section and adapted to wipingly engage the pipe to be coated, further adapted to slide longitudinally along said housing member to cover said discharge port means to prevent iluid passage therethrough;
a coil spring positioned between said shoulder section and said annular sealing means adapted to urge said annular sealing means into the discharge-portcovering position thereof, said coil spring being adapted to yield to the frictional force of said annular sealing means against the inner surface of said pipe as said housing member is moved through said pipe to uncover said port means; and
an annular huid-tight sealing means aiixed to said housing member above said port means for sliding, substantially fluid-tight sealing engagement with the inner wall of the pipe.
2. Apparatus for depositing a thin liquid ilm on the inner surface of a tubular pipe, comprising:
an elongated tubular housing member having a reduced section near its upper end, an enlarged section, and a connecting annular shoulder between said reduced section and said enlarged section, said housing member being of such diameter as to be slidable through a pipe to be coated;
an elongated annular plunger rod in telescoping arrangement within said housing member, said plunger rod being in sliding engagement with the end portion of said reduced section of said housing member and extending thereabove;
annular plunger means aixed to one end of said plunger rod, in sealing engagement with the inner wall of the enlarged section of said housing member;
discharge port means in said reduced section providing fluid communication between the exterior and the interior of said housing member;
said plunger means being `adapted to force liquid disposed between said plunger rod and said housing member through said discharge port means as said plunger rod and said housing member are moved out of telescoping arrangement;
an annular swab cup carrier in sliding t around said reduced section, adopted to slide longitudinally along said housing member to cover said discharge port means to prevent fluid passage therethrough;
a coil spring positioned between said shoulder section and the lower end of said swab cup carrier adapted to urge said swab cup carrier into the dischargeport-covering position thereof;
annular swab cup means on said swab cup carrier for wiping frictional engagement with the pipe to uncover said discharge port means against the force of said spring, said swab cup means being adapted to wipe a thin ilm of liquid on the inner surface of the pipe; and
annular fluid-tight sealing means aixed to said housing member above said port means for sliding, substantially huid-tight sealing engagement with the inner surface of the pipe.
3. Apparatus for depositing a thin liquid film on the inner surface of a tubular pipe, comprising:
an elongated tubular housing member having a reduced section near its upper end, an enlarged section, and a connecting annular shoulder between said reduced section and said enlarged section, said housing member being of such diameter as to be slidable through a pipe to be coated;
an elongated annular plunger rod in telescoping arrangement within said housing member, said plunger rod being in sliding engagement with the end portion of said reduced section of said housing member and extending thereabove;
annular plunger means aixed to one end of said plunger rod, in sealing engagement with the inner wall of the enlarged section of said housing member;
discharge port means in said reduced section providing fluid communication between the exterior and the interior of said housing member;
said plunger means being adapted to force liquid disposed between said plunger rod and said housing member through said vdischarge port means as said plunger rod and said housing member are moved out of telescoping arrangement;
an annular swab cup carrier in sliding lit around said reduced section, adapted to cover said discharge port means to prevent fluid passage therethrough;
a coil spring positioned between said shoulder section and the lower end of said swab cup carrier adapted to urge said swab cup carrier into the dischargeyportacovering position thereof;
annular swab cup means on said swab cup carrier for wiping frictional engagement with the pipe to uncover said discharge port means against the opposition of said spring, said swab cup means being adapted to wipe a thin ilm of liquid on the inner surface of the pipe;
annular fluid-tight sealing means aiiixed to said housing member above said port means for sliding, sub- 6 stantially fluid-tight sealing engagement with the inner surface of the pipe;
passageway means extending through said plunger means and plunger rod and establishing continuous communication through said housing member to establish equalized .pressure above and below the housing;
a apper valve including an annular flange havin-g a central opening therein and a spring-biased apper pivotally supported on said annular flange adapted :to pivot over the opening of said annular flange;
shear pin means connecting said flange within said annu-lar plunger means;
a recess in said plunger means;
a latch pivotally supported in said recess;
a catch on said apper adapted to be engaged by said latch to hold said apper away from the opening of said annular ange; and
a rod extending lfrom said recess through said plunger means and engaging said latch to urge said latch out of engagement with said catch when forced against said shoulder whereby said flapper is released to cover the opening of said annular ange.
Steinnes Dec. 30, 1930 Adams June 21, 1960
US91959A 1961-02-27 1961-02-27 Liquid coating applicator for inner surfaces of pipe strings Expired - Lifetime US3055339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US91959A US3055339A (en) 1961-02-27 1961-02-27 Liquid coating applicator for inner surfaces of pipe strings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91959A US3055339A (en) 1961-02-27 1961-02-27 Liquid coating applicator for inner surfaces of pipe strings

Publications (1)

Publication Number Publication Date
US3055339A true US3055339A (en) 1962-09-25

Family

ID=22230494

Family Applications (1)

Application Number Title Priority Date Filing Date
US91959A Expired - Lifetime US3055339A (en) 1961-02-27 1961-02-27 Liquid coating applicator for inner surfaces of pipe strings

Country Status (1)

Country Link
US (1) US3055339A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211573A (en) * 1962-03-05 1965-10-12 Bonded Products Inc Plastic lining of pipe
US3387348A (en) * 1964-11-17 1968-06-11 Crompton & Knowles Corp Device for making an internally coated tubular blank
US3404623A (en) * 1966-04-12 1968-10-08 Ferranti Ltd Screen printing apparatus
US3889628A (en) * 1973-08-13 1975-06-17 Fischer Ag Georg Fluid material applicator
US4108279A (en) * 1976-10-20 1978-08-22 Thomas Industries Of Tennessee, Inc. Dispenser and method for applying lubricant or other material to the interior of a conduit
US4716053A (en) * 1986-02-26 1987-12-29 Luther Eskijian Tubing coating device and method
US4780072A (en) * 1985-02-01 1988-10-25 Burnette Robert W Apparatus for internally coating welded pipe at the weldment
US5855676A (en) * 1997-05-01 1999-01-05 Virginia Tech Intellectual Properties, Inc. Tube lining apparatus
US20180036778A1 (en) * 2016-02-01 2018-02-08 Ptt Exploration And Production Public Company Limited Systems, devices, controllers, and methods for use in the treatment of a pipeline

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787126A (en) * 1926-03-01 1930-12-30 Steinnes Johann Device for coating the interior of walls of pipes or conduits
US2941500A (en) * 1958-03-25 1960-06-21 John G Adams Inhibitor applicator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787126A (en) * 1926-03-01 1930-12-30 Steinnes Johann Device for coating the interior of walls of pipes or conduits
US2941500A (en) * 1958-03-25 1960-06-21 John G Adams Inhibitor applicator

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211573A (en) * 1962-03-05 1965-10-12 Bonded Products Inc Plastic lining of pipe
US3387348A (en) * 1964-11-17 1968-06-11 Crompton & Knowles Corp Device for making an internally coated tubular blank
US3404623A (en) * 1966-04-12 1968-10-08 Ferranti Ltd Screen printing apparatus
US3889628A (en) * 1973-08-13 1975-06-17 Fischer Ag Georg Fluid material applicator
US4108279A (en) * 1976-10-20 1978-08-22 Thomas Industries Of Tennessee, Inc. Dispenser and method for applying lubricant or other material to the interior of a conduit
US4780072A (en) * 1985-02-01 1988-10-25 Burnette Robert W Apparatus for internally coating welded pipe at the weldment
US4716053A (en) * 1986-02-26 1987-12-29 Luther Eskijian Tubing coating device and method
US5855676A (en) * 1997-05-01 1999-01-05 Virginia Tech Intellectual Properties, Inc. Tube lining apparatus
US20180036778A1 (en) * 2016-02-01 2018-02-08 Ptt Exploration And Production Public Company Limited Systems, devices, controllers, and methods for use in the treatment of a pipeline
US10780472B2 (en) * 2016-02-01 2020-09-22 Ptt Exploration And Production Public Company Limited Systems, devices, controllers, and methods for use in the treatment of a pipeline

Similar Documents

Publication Publication Date Title
US3055339A (en) Liquid coating applicator for inner surfaces of pipe strings
US5181569A (en) Pressure operated valve
US4667743A (en) Low pressure responsive tester valve with ratchet
US2990851A (en) Multiple valve and connection
US4474242A (en) Annulus pressure controlled reversing valve
US2925865A (en) Full flow packer cementing shoe
US4031955A (en) Down hole inhibitor injector
US2781852A (en) Well packer
US3003560A (en) Pump tool for reworking submarine wells
US2342884A (en) Hydraulic packer
US2852080A (en) Chemical injector for well tubing
US3338311A (en) Stage cementing collar
CN113898306A (en) In-situ self-triggering while-drilling film-forming quality-guaranteeing coring device and method
US2735498A (en) Apparatus for automatically
US4319633A (en) Drill pipe tester and safety valve
US2741313A (en) Wire line tester
US3517736A (en) Subsurface wireline system
US2941500A (en) Inhibitor applicator
US3543849A (en) Cement retainer valve for well packers
US3108024A (en) Liquid coating applicator
US2750958A (en) Drill pipe float valve
US3208788A (en) Well tools
US3650325A (en) Well bridging apparatus having a detachable setting means
US2859827A (en) Apparatus for treating wells
US2453068A (en) Apparatus for depositing material in well holes