MX2010005797A - Coil tubing method including production tubing member with auxiliary conduit. - Google Patents

Abstract

A tubing member for use in well operations comprises a solid core extruded casing surrounding a production tubing passage arranged to receive produced fluids from a well therethrough and one or more auxiliary conduits arranged for communicate with well equipment. The casing is rectangular in cross section having a pair of opposed flat sides which can be wound onto a spool such that the flat sides are parallel to an axis of rotation of the spool. The casing material is more resilient and soft than the protection tubing, so that allowing the spool to be easily wound onto the tubing member. The unitary casing provides good protection for electrical lines, hydraulic lines and other communication lines in the conduits alongside production tubing in a low cost and easy to manufacture tubing member.

Description

METHOD OF COIL PIPING INCLUDING A PRODUCTION PIPELINE WITH AN AUXILIARY DUCT FIELD OF THE INVENTION The present invention relates to a pipe member for use in well operations, for example, for communication with or control of a deep-hole submersible pump. In addition, the present invention relates to a method for deploying a pump, for example, ESP (Electric Submersible pumps), HSP (Submersible pumps).

Hydraulics), jet pumps, or other artificial lifting equipment, in an existing live well orifice, using a continuous plastic, and / or metal umbilical pipe member, having a production passage therethrough and at least an auxiliary duct that extends through it.

BACKGROUND In the field of oil and gas production, ESP (Electric Submersible pumps) and HSP (Hydraulic Submersible Pumps) are commonly used to evacuate well-hole fluids from oil and gas wells. Submersible pumps have various sizes and capacities. The Submersible pump is normally connected to the bottom of a conventional single threaded and coupled pipe. Then, in the In the case of an ESP, when the pipe is inserted into the hole in the well, the electric wire emerges from a spool and is trapped on the side of the single pipe as it is inserted into the well bore. Hydraulic fluid lines can similarly be trapped to the joined pipe side in the case of an HSP.

The conventional ESP deployment system requires that the cable be heavily armed as it is often exposed to significant wear as it is rubbed between the housing and the pipe during deployment. This type of deployment is slow and expensive.

The documents of the following prior art illustrate several examples of pipe to be used in well operations. The patent application of E.U.A. 2003/0181085 which belong to Restarick et al., Patent of E.U.A. 3,871,734 belonging to Murtland, patent of E.U.A. 4,336,415 belonging to Walling, patent of E.U.A. 6,192,983 which belongs to Neuroth et al., Patent of E.U.A. 6,857,486 that. belongs to Chitwood et al., patent of E.U.A. 6,706,348 which belongs to Quigley et al., US patent. 6,296,066 which belongs to Terry et al., U.S. Patent No. 5,913,337 which belongs to Williams et al., U.S. Pat. 5,553,666 which belongs to Hartman, patent of E.U.A. 5,285,204 which belongs to Sas-Jawrosky and patent of E.U.A. 5,285,008 which belongs to Sas-Jaworsky and others.

In general, attempts of the prior art to include multiple conduits in a mixed pipe member requires that the conduits be formed in a spiral pattern to balance the tension in the longitudinal direction of the pipe and / or require a complex manufacturing process for forming the pipe in layers wrapped around each other. Consequently, prior art attempts to form multi-function tubing members remain costly and impractical in many situations.

SUMMARY OF THE INVENTION According to one aspect of the invention, a coil tubing method comprising: • provide a roll-up reel production line that extends in a longitudinal direction and is arranged in such a way that it receives fluids produced from a well through it; providing at least one auxiliary conduit arranged to receive an auxiliary line for communication with deep-hole well equipment; Extrude a housing material integrally around the production pipe and at least one auxiliary conduit so that the housing material forms a unitary housing surrounding the pipeline. production and at least one auxiliary duct 1 extending in the longitudinal direction of the production line; Y forming the housing material to be resilient so that the housing material has a hardness that is softer than a hardness of the production pipe. ' To provide a unit housing by locating the production pipe and auxiliary conduits therein, the pipe member can be manufactured easily and at low cost by a simple extrusion process. A solid plastic core formed by extrusion in a unitary housing that is resilient also provides good protection for power lines, hydraulic lines and other communication lines in the conduit while easily allowing the pipe member to be reel wound. By additionally arranging the unitary housing to be square in cross section, the conduits and pipe passage can be balanced between the opposite parallel sides of the square cross-section of the housing so as to balance the tension applied to the conduit and the pipe passage when the pipe is wound. pipe member on a reel. This avoids the extra cost associated with the spiral configurations required in the prior art. ' Preferably the method includes forming the housing material for: i) being more flexible and more stretchable in the longitudinal direction than the pipe and at least one auxiliary duct; ii) comprise a thermoplastic vulcanizate, or more particularly a vulcanized rubber modified polypropylene, which is continuous and free flowing; iii) has a Shore D hardness on the scale of 30 to 70 and more preferably about 50; iv) has a lower tensile strength than the production pipeline so that the tensile strength is between 98.42 kg / cm2 and 133.57 kg / cm2 and more preferably is 115.995 kg / cm2; Y v) has an elongation of approximately 40% with yield to tension.

The production line preferably comprises a metal pipe that can be wound on a cart, for example carbon steel.

In some cases, a bonding agent is applied to the production pipe before extruding the housing material around the production pipe so that the pipe member is suitable for use in higher pressure applications to prevent migration of the pipe. gas between the production pipe and the surrounding casting material.

Alternatively, the housing material can be extruded around the production pipe so that the housing material remains substantially unattached to the production pipe and so that the housing material is easily separated from the production pipe.

The other method may include inserting the unitary housing into a production well comprising a well head and handling the unitary housing of a pipe hanger at the wellhead by separating the housing material from an end portion of the production pipeline and by At least one auxiliary duct at the head of the well and connecting the pipe hanger directly to the production pipeline.

In addition, the method may further include arranging the pipe hanger to comprise a separation nut that includes two portions with respective equalizing faces arranged to be matched to one another so that the pipe and at least one auxiliary conduit are clamped between the two. equalizing faces of the two portions of the split nut in direct engagement with the equalizing faces of the two portions of the split nut after the housing material has been detached from the end portion.

When the unit housing is inserted into a production well using a roll pipe injector comprising opposing shoes to hold the unit housing therebetween the method preferably includes holding the unit housing with the opposite shoes so that the housing material is elastically compressed between the opposing shoes as the unit housing is inserted into the production well.

The cord provides the electricity to drive the pump into the housing of an ESP or hydraulic fluid to drive the pump into the housing of an HSP, as well as the production pipe to evacuate fluids and gases from the well bore via the pump.

This cord will have a square or rectangular shape consisting of multiple tubular shapes (plastic and steel) as well as, but not limited to, electrical wiring, support cables, optical fiber or chemical injection, etc. All these materials will be encapsulated in an umbilical chain.

In this system, the electric wires or hydraulic lines, as well as the production pipe, are housed within a square or rectangular umbilical pipe member. This cord is then injected into the well hole continuously with the pump at the end. This removes the need for expensive reinforcement coatings and significantly speeds up the operation.

The unit housing preferably comprises a solid core of plastic material locating the pipe passage and the auxiliary conduit in respective holes in the solid core.

The unit housing preferably comprises an extruded member.

The unit housing is preferably rectangular in cross section. The pipe passage and at least one auxiliary conduit preferably each have a central axis positioned such that the central axes are equidistant from a flat external surface of the housing in relation to one another.

When provided in combination with a spool supported for rotation about an axis of rotation, the pipe member is preferably wound on the spool so that the outer surface, in relation to which the axes are equidistant, are parallel to the axis of rotation. rotation of the spool.

The pipe passage and at least one auxiliary passage are preferably parallel to at least one flat external surface of the housing.

The pipe passage and at least one auxiliary conduit are preferably parallel to one another and separate from each other along the length of the housing.

A plastic production pipe can be provided which lines the pipe passage along the length of the housing in which the production pipeline is arranged to receive fluids produced from a well operation therethrough. Alternatively, metal production pipe can be provided by lining the pipe passage along the length of the unit housing. When provided in combination with a submersible pump that communicates the production fluids in the production pipe passage, at least one auxiliary conduit; preferably receives control lines arranged to operate the pump therethrough.

When the submersible pump comprises an electric submersible pump, said at least one auxiliary conduit preferably receives electric lines therethrough.

Alternatively, when the submersible pump comprises a submersible hydraulic pump, at least one auxiliary conduit preferably comprises a pair of auxiliary conduits communicating hydraulic fluid therethrough to control the pump.

At least one auxiliary conduit can also receive several power supply cables therethrough to supply power or control different deep-hole equipment. Said at least one auxiliary duct can also receive fiber optic lines, lines electronic, sliding lines or capillary tubes through them. Alternatively or in addition to, at least one auxiliary conduit may comprise a pair communicating hydraulic fluid therethrough.

The auxiliary conduit may receive a plurality of auxiliary lines therethrough which are wound helically around a central axis of the auxiliary conduit.

When the auxiliary conduit comprises a plurality of auxiliary conduits spaced along a common diametrical axis of the pipe passage, the unitary housing of the pipe member is preferably wound on a spool so that the common diametrical axis of the pipe passage is oriented parallel to an axis of rotation of the spool.

Some embodiments of the invention will now be described along with the accompanying drawings in which: BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of the pipe member inserted into a well housing of a spool using a pipe injector style.

Figure 2 is an elevation view of a reel in which the pipe member is wound.

Figure 3 is a perspective view in partial section of a first embodiment of the pipe member.

Figure 4 is a sectional end view of the pipe member according to Figure 3.

Figure 5 is a perspective view in partial section of a second embodiment of the pipe member.

Figure 6 is a sectional end view of the pipe member according to Figure 5.

Figure 7 is a perspective view in partial section of a third embodiment of the pipe member.

Figure 8 is a sectional end view of the pipe member according to Figure 7.

Figure 9 is a perspective view in partial section of a fourth embodiment of the pipe member.

Figure 10 is a sectional end view of the pipe member according to Figure 9.

Figure 11 is a perspective view in partial section of a removable embodiment of the pipe member.

Figure 12 is a sectional end view of the pipe member according to Figure 11.

Figure 13 is a perspective view in partial section of a sixth embodiment of the pipe member.

Figure 14 is an extreme sectional view of the pipe member according to Figure 13.

Figure 15 is a perspective view in partial section of a seventh embodiment of the pipe member.

Figure 16 is a sectional end view of the pipe member according to Figure 15.

Figure 17 is a perspective view in partial section of an eighth embodiment of the pipe member.

Figure 18 is a sectional end view of the acupressure pipe member with Figure 17.

Figure 19 is an elevation view in partial section of a pipe coupling coupling with an end portion of the pipe member wherein the housing material has been separated from the production pipe and auxiliary conduits.

Figure 20 is a perspective view of the nut of the pipe hanger shown separate from the detached end portion of the pipe member.

In the drawings similar reference characters indicate corresponding parts in different figures.

DETAILED DESCRIPTION Referring to the appended figures, a pipe member indicated generally by the reference number 10 is illustrated. The pipe member 10 is particularly suitable for use as a pipe string, for example, an umbilical cord chain in communication with a submersible pump 12 or for other different well operations. The pipe member serves both the production pipe function and includes means for controlling the pump or other deep hole tools to which it is connected.

As shown in Figure 1, the outer housing 14 of a well hole receives the elongated pipe member extending longitudinally therethrough. In the illustrated embodiment, the pump 12 comprises a submersible pump 16 coupled to the lower end of the pipe member 10 to communicate through the pipe member to the surface. The pipe member 0 is flexible to be housed in a suitable reel 18 on the surface. The pipe member is wound off the spool 18 and a suitable guidewire 20 is guided on a pipeline injector 22 above the wellhead 21 which serves to inject the spool pipe 18 into the wellbore housing. 14. The coil tubing injector 22 comprises opposing lugs 23 which adjust the tubing member 10 therebetween to insert the tubing into the production well.

The various aspects of the pipeline member are described and illustrated herein, the aspects Common of the different modalities will be described first.

The pipe member comprises a unitary solid core housing that is integrally formed of the unitary material by an extrusion process. The plastic material, for example, polyurethane, nylon, neopentene and the like can be extruded to form a unitary solid core housing 26 of the pipe member. The housing is rectangular in cross section so as to define two pairs of external surfaces diametrically opposed and parallel levers extending in the longitudinal direction the length of the pipe member. The typical dimensions of the housing can be in the order of 2.5 to 15.24 cm by 2.5 to 15.24 cm. The flat configuration of the outer surfaces allows the winding on the spool so that one of the opposite pairs of the flat surfaces remains parallel to a spool rotation axis 27.

The solid core housing 26 includes a pipe passage 30 formed therein to extend in the longitudinal direction. of the pipe member parallel to the external surfaces 28 thereof. The steel or plastic production pipe 32 that is flexible enough to be wound on the spool forms a liner that aligns the pipe passage 30 to extend through the pipe. passage the length of the pipe member. The pipe passage 30 thus forms a hole in the solid core of the housing that receives the pipe 32 therein by extracting the housing around the pipe 32.

At least one auxiliary duct 34 is also formed in a respective hole extending in the longitudinal direction of the pipe member through the housing 26. A central axis of the duct 34 and a central axis of the pipe passage 30 are arranged to be located centrally equidistantly between one of the opposite pairs of the outer surfaces of the housing such that the center of the conduit and the center of the passageway 30 are equidistant from at least one external surface 28 of the housing. A diametrical line drawn between the centers of the conduit 34 and the passage 30 is parallel to one of the outer surfaces 28 of the housing. The conduit 34 and the passage 30 remain parallel to one another and the external surfaces 28 of the housing along the length thereof.

Each conduit 34 is arranged to receive respective auxiliary lines therethrough which may include power supply wires, communication lines such as optical fiber, hydraulic control lines, an electronic line, or a slidable line, for example.

The auxiliary lines of each conduit 34 and the production pipe 32 of the pipe passage 30 are oriented parallel and are separated and attracted together through the extrusion process forming the surrounding housing 26 so that the housing formed simultaneously and integrally around the the auxiliary lines and the production line 32. When there are a plurality of conduits 34 receiving auxiliary lines therethrough, the conduits 34 are located at spaced apart positions along a common diametrical axis 35 of the production pipeline passage. so that a center of each of the conduits and passages is equidistant from the two opposite faces of the housing that are parallel to the axis of rotation of the spool.

Other ducts can be provided in addition to the auxiliary duct 34 in which the center of the other ducts are not necessarily equidistant from one of the external surfaces compared to the passage of pipe 30. Providing auxiliary lines in the other ducts having a sufficient tensile strength High overcomes the problem of different tensile forces by being applied to different parts of the pipe member as it is combined and dispensed.

In a preferred embodiment, the production pipe 32 comprises a carbon steel which can be roll on a reel around which the housing material is extruded to form the unitary housing. The housing material in the preferred embodiment comprises a thermoplastic vulcanizate, more particularly a vulcanized rubber modified polypropylene, which is continuous and seamless. The housing material is arranged to be resilient so that the housing material has a force that is softer than a pipe hardness, has a tensile strength that is lower than the production pipe and is more flexible and more Stretchable in the longitudinal direction that the pipe and / or auxiliary ducts. The properties of the housing material are typically arranged to have a Shoré D hardness of about 50. In addition, the material has a tensile strength of approximately 115,995 kg / cm2 with an elongation of about 40% with tension performance. When carried out TaberTest ™ is carried out in the resulting unit housing, the housing material has an abrasion resistance that corresponds approximately to the Desgate Index 5 of ASTM D904.

When inserting the pipe member 20 into a well, the unitary housing is normally clamped between the opposing shoes 23 of the cooled pipe injector 22 so that the housing material is compressed elastically between the opposing shoes as the unit housing is inserted into the production well. This serves to transfer the transport force from the injector head of coiled tubing to the production tubing through the housing material despite the resilience of the housing material forming the unitary housing around the production tubing and auxiliary tubing. . - In some embodiments, a bonding agent is applied to the production pipe before extruding the housing material around the production pipe so that the housing material forming the unitary housing is integrally attached to the pipe throughout of the length of it. In this case, the pipe member is suitable for use in high pressure applications to prevent migration of gas between the pipe and surrounding housing material.

In alternative embodiments the housing material is extruded directly around the production line without additional bonding agent therebetween so that the housing material remains substantially unattached to the production line. In this case, the pipe member is of low production cost and the casting material can be detached more easily from The production pipeline when releasing the well head tube as described in more detail later.

By changing the time to the modes in Figures 3 to 6, a single auxiliary duct 34 is provided which has its center aligned with the center of the pipe passage 30 so that it is equidistant from one of the other surfaces 28.

According to the embodiment of Figures 3 and 4, the single conduit 34 includes a tubular liner of flexible material to allow a rigid plastic material to be wound on the reel. The tubular liner therefore forms a suitable uvular passage so that the conduit 34 can receive several with control line configurations therethrough to control the deep orifice equipment.

Alternatively, as shown in Figures 5 and 6, the single conduit 34 includes a plurality of communication lines extending therethrough that form a twisted or spiral post 38. The post 38 is spirally or twisted about a central axis centrally aligned with the center of the duct 34 which remains equidistant from one of the outer surfaces 28 relative to the center of the passage 30.

These modalities are particularly suitable for use in combination with an Electric Submersible Pump in wherein the communication lines comprise electrical lines in connection with the pump 16 and which are arranged to control the operation of the pump of a suitable control on the surface, at the upper end of the well housing for which the lines are in connection Communication.

In a further embodiment, a pair of conduits can be provided on the diametrically opposed sides of the pipe passage 30 so that both conduits 34 and the pipe passage 30 have a central axis that is equidistant from one of the outer surfaces 28 of the housing. rectangular cross section. Each of the plurality of conduits 34 when a pair of conduits 34 is provided can be provided with a double pole 38 of communication lines comprising electrical lines or optical fiber, etc., as described above.

In still other embodiments, the pair of conduits 34 are separated along the common diametrical axis on a common side of the production pipe. In this case, a plurality of conduits 34 may be provided in several radial spacings of the pipe passage 30 but on a common side of the pipe passage while again remaining 'equidistant between the respective centers and one of the outer surfaces 28 of the rectangular housing.

In further embodiments as described below with respect to Figures 15 to 18, a pair of conduits 34 may be placed either on one side of the production line or on diametrically opposed sides, but the conduits may instead comprise lines Auxiliary in the form of hydraulic conduits to drive hydraulic fluid through it. This configuration is particularly suitable for use with a hydraulic submersible pump so that the conduits 34 serve to communicate hydraulic fluid therethrough to drive and operate the pump while the pipe passage 30 receives the production line to communicate the fluids of production pumped back to the surface.

Turning now to Figures 7 to 10, the additional embodiments of the pipe member are illustrated in which the auxiliary conduit 34 comprises a liner thereon forming a tubular member with a defined fluid passage therethrough having a near diameter to the diameter of the production pipeline. This configuration is suitable for use with a deep-hole pump 16 of the type comprising a jet pump. In this case a pumping fluid is pumped down through an auxiliary duct 34 to collect fluids produced at the lower end of the pipe member in the pump 16 so that the carrier fluid together with the fluids produced return to the production pipe in the pipe passage of housing 26.

As shown in Figures 7 and 8, the auxiliary conduit and the pipe passage can differ in diameter so that it receives a 3.81 cm diameter plastic pipe, for example while the other receives a carbon steel pipe from 9.525 cm in diameter through it so that the production pipe and the auxiliary duct are also lined with different materials. As shown in Figures 9 and 10, the passage of production tubing that receives the tubing therein and the auxiliary conduit that receives the auxiliary line therethrough can receive pipes or tubes that extend therethrough having the Same diameter and they are formed from the same material or different material, for example metal plastic.

Turning now to Figures 11 to 14, an additional configuration of the s &p pipe member sample. In addition to the production tubing extending through the pipe passage, the unit casting is also provided with two auxiliary conduits 34 extending therethrough. In both cases one of the auxiliary lines received through the auxiliary conduits is close in diameter to the production pipe while the other auxiliary line received through a respective auxiliary conduit is quite smaller in diameter. For example, the auxiliary line smaller may have the range of 0.63 cm to 1.27 cm in diameter while the production line and another auxiliary line in its respective auxiliary conduit may be in the range of 2.54 cm to 3.81 cm in diameter. As shown in the illustrated embodiments, the minor auxiliary conduit is suitable between the production line and the larger auxiliary conduit with the centers of the conduits and the production line remaining equidistant to the two faces of the surrounding housing.

Changing more particularly to Figures 11 and 12, both the production line and the larger auxiliary line on set sides of the minor auxiliary line may be identical in diameter and may be formed of the same or different materials such as steel or plastic. Alternatively as shown in Figures 13 and 14, the auxiliary conduit that is larger and closer in size to the production pipe may still be slightly larger or slightly smaller in diameter while similarly formed of similar or different materials eg steel or steel. plastic.

The pipe members shown in Figures 11 to 14 are suitable for use with a jet pump in which the larger auxiliary conduit in diameter to the production line is used to pump a carrier fluid down to collect fluids produced similarly to the embodiments of Figures 7 to 10. In this case the minor auxiliary line received in the auxiliary conduit in the center of the pipe member can be used to receive several lines of communication therethrough including electric, hydraulic or fiber optic and the like to control the additional deep hole equipment or sensors. Alternatively this pipe member configuration can provide electrical controls for an electric submersible pump through a smaller central auxiliary conduit so as to produce fluids the production pipe is pumped while the larger auxiliary conduit is used to selectively inject fluids into the pit according to be required.

Turning now to Figures 15 to 18, in an additional embodiment of the pipe member, two auxiliary conduits are provided having an auxiliary line in the form of a pipe extending therethrough that is close in diameter to the diameter of the pipeline. production. More particularly as shown in Figures 15 and 16, the two auxiliary lines are slightly larger in diameter than the production pipe located centrally between them, for example, the pipe of the auxiliary lines can be 2.54 cm in diameter while the pipeline of production is 1.9 cm in diameter with the auxiliary ducts being formed of steel while forming the pipe of production of steel or plastic. This mode is particularly suitable for use with a submersible hydraulic pump in which the fluid in two auxiliary ducts are alternately pressurized to cause a reciprocal pumping action of the hydraulic submersible pump to which they are connected which in turn pumps a fluid produced through the production pipe located centrally in the housing.

Alternatively as shown in Figures 17 and 18, the two auxiliary conduits may include pipe extending therethrough which is identical in diameter to the production pipeline so that three lined passages extend through the unitary housing that They are identical to each other This configuration is also particularly suitable for use with a submersible hydraulic pump, eg the two auxiliary lines extending through respective auxiliary conduits 34 according to a circuit with the pump 16 with which they are in communication so that the hydraulic fluid is pumped down in one of the ducts to drive the pump and return the other duct to operate the pump which in turn pumps produced fluids to the production pipe 32. The diameter of the three identical pipe passages extending through the housing in this case can be 1.9 cm or 2.54 cm in diameter for example with the three Pipe passages being formed of steel, or metal or alternatively different from the passages can be formed of different materials.

In still further embodiments, the casting of the pipe member may comprise a plurality of different types of conduits 34 in combination with the pipe passage 30 of the operating combinations of hydraulic tools and power tools and the like. Examples of various tools that can communicate with the pipe member 10 include recording tools for recording temperature or pressure, video cameras, drill motors and various directional tools. In each case, by locating several conduits 34 so that the central axes extending longitudinally therefrom are parallel and equidistant from two opposite parallel faces of the surrounding housing, the pipe member can be wound on a reel so that the tension forces in the conduits and the pipe member are substantially equal.

Turning now to Figures 19 and 20, once the pipe member 19 has been inserted into a production well, hanging from the pipeline member of the wellhead is achieved using a pipe hanger 50 comprising a nut 52 disposed for engaging a detached end portion 54 of the pipe member so that the nut it is connected directly to the production pipeline and the auxiliary conduits suspended from it. In the detached end portion 54, the housing material 26 forming the unitary housing is detached and removed from the end portion of the production pipe 32 and the auxiliary conduits 34 so as to expose the pipe and conduits.

The nut 52 of the pipe hanger 50 is a separation nut that includes two equalizing portions 56 with respective equalizing faces arranged to abut and match each other with the production line and the auxiliary conduits clamped therebetween and in direct engagement with each other. the equalizing faces of the two equalizing portions 56 after the housing material has been separated from the end portion. Each of the two equalizing portions 56 is semi-circular so that the adjacent equalizing portions form a cylindrical nut arranged to be sealed at the wellhead. The equalizing faces of the two portions abut one another along a vertical plane extending diametrically through the nut. A semicircular depression 58 expanding a full length of the nut is provided on each of the two equalizing faces of the nut in association with one another of the production pipeline and the auxiliary conduits 34. Each depression receives only a portion of a circumference of a respective one of the production pipe or auxiliary conduit that will be received therein with the other portion of the circumference being received in a corresponding depression in the equalization portion 56. When the equalizing faces are joined, the fasteners embrace the two portions 56 to directly hold the separated end portions of the production pipe and auxiliary conduits.

Since various modifications can be made to the invention as described above, and many seemingly widely different modalities thereof can be made within the spirit and scope of the claims without departing from the spirit and scope, it is intended that all the matter contained in the attached specification is interpreted as illustrative only and not in a limiting sense.

Claims (23)

1. A method of coil tubing comprising: providing a production line that can be wound onto a reel extending in a longitudinal direction and being arranged to receive fluids produced from a well therethrough; provide at least one auxiliary conduit arranged to receive an auxiliary line for communication with the deep-hole well equipment; extruding a housing material integrally around the production pipe and at least one auxiliary pipe so that the housing material forms a unitary housing surrounding the production pipe and at least one auxiliary pipe extending in the longitudinal direction of the production pipeline; Y forming the housing material to be resilient so that the housing material has a hardness that is softer than a hardness of the production pipe.

2. - The method according to claim 1, including forming the housing material that will be more flexible and stretchable in the longitudinal direction than the production line and at least one auxiliary line.

3. - The method according to one of claims 1 or 2, including forming the casting material to comprise a thermoplastic vulcanizate that is continuous and without joints therethrough.

4. - The method according to any of claims 1 to 3, including forming the housing material to comprise a vulcanized rubber modified polypropylene that is continuous and without joints therethrough.

5. - The method according to any of claims 1 to 4, including forming the housing material to have a Shore D hardness on the scale of 30 to 70.

6. - The method according to any of claims 1 to 5, including forming the housing material to have a Shore D hardness of about 50.

7. - The method according to any of claims 1 to 6, including forming the housing material to have a lower tensile strength than the production line.

8. - The method according to any of claims 1 to 7, including forming the housing material to have a tensile strength that is between 98.42 kg / cm2 and 133.57 kg / cm2.

9. - The method according to any of claims 1 to 8, including forming the housing material to have a tensile strength of approximately 115,995 kg / cm2.

10. - The method according to any of claims 1 to 9, including forming the housing material to have an elongation of about 40% yield to tension.

11. - The method according to any of claims 1 to 10, includes forming the production line to comprise a metal that can be wound on a reel.

12. - The method according to any of claims 1 to 11, including applying a bonding agent to the production pipe before extruding the housing material around the production pipe.

13. - The method according to any of claims 1 to 12, including extruding the housing material around the production pipe so that the housing material remains substantially unattached to the production pipe and so that the housing material it can be easily detached from the production pipe and so that the housing material can be easily detached from the production pipe.

14. - The method according to any of claims 1 to 13, including inserting the unitary housing in a production well comprising a well head and hanging the unitary housing of a pipe hanger at the wellhead separating the housing material of an end portion of the production pipe and at least one auxiliary duct in the well head and connecting the pipe hanger directly to the production pipe method.

15. - The method according to claim 14, including arranging the pipe hanger to comprise a separation nut that includes two portions with respective equalization faces arranged to be equal to one another such that the pipe and at least one auxiliary conduit are clamped between the equalizing faces of the two portions of the split nut in direct engagement with the equalizing faces of the two portions of the split nut after the housing material has been separated from the end portion.

16. - The method according to any of claims 1 to 15, including inserting the unit housing in a production well using a coil tubing injector comprising opposing lugs for holding the unit housing therebetween and holding the opposite housing for securing the housing unitary between them and holding the unit housing with the opposing shoes so that the housing material is elastically compressed between the opposing shoes as the unit housing is inserted into the production well.

17. - The method according to any of claims 1 to 16, including forming the unitary housing which will be rectangular in cross section.

18. - The method according to any of claims 1 to 17, including locating a central axis of each of the production line and at least one auxiliary conduit so that the central axes are equidistant to an external flat surface of the housing in relationship with one another

19. - The method according to claim 18, including winding the unitary housing on a reel so that the flat outer surface, in relation to which the central axes are equidistant, is parallel to an axis of rotation of the reel.

20. - The method according to any of claims 1 to 19, including orienting the production line and at least one auxiliary line that will be parallel to at least one flat outer surface of the housing and separated from one another along a length of the accommodation.

21. - The method according to any of claims 1 to 20, including providing a submersible pump arranged to communicate production fluids in the production pipe passage and providing control lines that extend through at least one auxiliary conduit arranged to operate the pump.

22. - The method according to any of claims 1 to 21, including providing a plurality of auxiliary conduits, and locating the auxiliary conduits separated from one another along a common diametrical axis of the pipe passage.

23. - The method according to claim 22, including winding the unitary housing on a reel so that the common diametrical axis of the pipe passage is oriented parallel to an axis of rotation of the spool.