CN102305315B - Operating method for making cable pass through overlong continuous oil pipe - Google Patents

Abstract

The invention discloses an operating method for making a cable pass through an overlong continuous oil pipe. A continuous oil pipe (11) is put down along a straight well, a cable (4) is put down into the continuous oil pipe (11), and the cable passes through the whole continuous oil pipe (11) by means of self weight of the cable to fall to the bottom. The cable passes through the overlong continuous oil pipe by means of the self weight of the cable, so that the process is simple and safe, and the cost is low.

Description

Operating method for making cable pass through overlong continuous oil pipe

Technical field

The present invention relates to apparatus for work or the methods such as support of International Classification of Patents patent classification F16L oil drilling pipe, cable or pillar, especially relate to the method that runs through cable in the oil gas field well testing related process technology in the overlength coiled tubing.

Background technology

The advantages such as in the known technology, the coiled tubing Well Test Technology is the new technology of promoting in oil gas field well testing field in recent years, not only can be used for the straight well test, also can be used for the horizontal well test, and it is low to have an operating cost, and the testing time is short.This technical overview is: test cable is run through and be encapsulated in the coiled tubing, the terminal connecting test instrument of coiled tubing, head end linkage record instrument; Coild tubing unit is delivered to purpose well section test downhole parameters by coiled tubing with tester.

The coiled tubing internal diameter is 19mm, and the external diameter of test cable is 12mm, surpass in the overlength coiled tubing of 3000m in length and run through test cable, and domestic Operation Tubing Aggregate manufacturing firm there is no precedent.Jiang-Han Area four machine factories once designed with pump truck and suppressed the coiled tubing that the driven plunger traction steel wire runs through horizontal positioned, recycling steel wire traction cable penetration.But when practical operation, because coiled tubing is oversize, the resistance of steel wire in pipe is too large, though through repetition test and adjustment, can only pass through at most 1300 meters.The cable penetration crawl device is abroad arranged, also be difficult to realize when coiled tubing surpasses 2000m, and expensive, and cost is very high.

In published patent application, do not find related art scheme.

Summary of the invention

The purpose of this invention is to provide and a kind of armored cable is surpassed effective operation method in 3000 meters the coiled tubing through length, utilize this method in order to carry out coiled tubing well testing test.

Goal of the invention of the present invention realizes by following technical measures: the straight down-hole of coiled tubing is put, cable is lowered to this coiled tubing, cable runs through with its deadweight to be fallen the bottom behind whole coiled tubings and realizes running through.

The invention has the beneficial effects as follows: utilize the cable self gravitation to run through the coiled tubing of overlength, process is simple, safety, and cost is lower.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention 1

Reference numeral: Operation Tubing Aggregate 1, crane 2, pulley 3, cable 4, cable car 5 continues oil pipe upper end 6, injection head 7, preventer 8, wellhead assembly 9, cable 10, coiled tubing 11, oil pipe 12 repeatedly.

The specific embodiment

Below in conjunction with the specific embodiment, further set forth the present invention.

Coiled tubing 11 straight down-holes are put, cable 4 is lowered to this coiled tubing 11 again, cable 4 runs through with its deadweight to be fallen the bottom behind whole coiled tubings 11 and realizes running through.

In the situation by the threading guiding device not, in well, be lowered to coiled tubing, the payout that lets droop from its upper end again realizes running through coiled tubing smoothly.

Embodiment 1:

Method in the present embodiment specifically comprises:

Cable 4 is launched to discharge torsion, on the neat cylinder that is wrapped in cable car 5 of rule; With the endcapped of electric welding with coiled tubing 11;

With Operation Tubing Aggregate 1 coiled tubing 11 all is lowered in the oil pipe 12 of straight well of appropriate depth, should make coiled tubing 11 vertical as far as possible, coiled tubing upper end 6 is slightly exposed injection head 7 and is kept vertically, and wellhead assembly 9 connects preventers 8 and fixing injection head 7 above well head;

With crane 2 pulley 3 is sling and to be placed coiled tubing 11 tops, the staff passes pulley 3 with cable 4 and vertically imports in the coiled tubing 11, cable 11 begins to penetrate under self gravitation after the guiding a little, utilize cable car 5 suitable control cables 4 lowering velocities, until cable 11 all is lowered in the coiled tubing 11;

Will penetrate the coiled tubing 11 of cable 4 propose, two ends are fixed and are sealed, the end joint that installs instruments;

The present invention is lowered to a bite degree of depth with Operation Tubing Aggregate 1 with coiled tubing 11 and surpasses in the straight well of coiled tubing 11 length, manually cable 4 is imported coiled tubing 11, and cable 4 runs through in the coiled tubing 11 smoothly under Action of Gravity Field.

Present embodiment utilizes cable 4 self gravitations to run through coiled tubing 11 when work, and process is simple, safety, and cost is lower.

Claims (1)

1. operating method for making cable pass through overlong continuous oil pipe, it is characterized in that: the straight down-hole of coiled tubing (11) is put, cable (4) is lowered to this coiled tubing (11), and cable runs through with its deadweight to be fallen the bottom behind whole coiled tubings (11) and realizes running through; Method specifically comprises:

1) cable (4) is launched to discharge torsion, on the neat cylinder that is wrapped in cable car (5) of rule, with the endcapped of electric welding with coiled tubing (11);

2) coiled tubing (11) all is lowered in the straight well inner sleeve (12) of appropriate depth with Operation Tubing Aggregate (1), should make coiled tubing (11) vertical as far as possible, (6) are slightly exposed injection head (7) and are kept vertical on the coiled tubing, connect the rear fixedly injection head (7) of preventer (8) at wellhead assembly (9);

3) with crane (2) pulley (3) is sling and placed coiled tubing (11) top, the staff passes pulley (3) with cable (4) and vertically imports in the coiled tubing (11), cable (4) begins to penetrate under self gravitation after the guiding a little, utilize suitably control cables (4) lowering velocity of cable car (5), until cable (4) all is lowered in the coiled tubing (11);

The coiled tubing (11) that 4) will penetrate cable (4) proposes, and two ends are fixed and sealed, the end joint that installs instruments.

Images